Atwood Water Heater Service

7/28/2019 Atwood Water Heater Service

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September 2003

INTRODUCTION

The 2004 ed ition o f the Atw oo d Wa ter Heate r Service Manua l is a res ource c rea ted to

help service technicians identify Atwood product by serial number, diagnose service

prob lems and efficiently a nd effec tively proces s w arra nty claims.

In 2003, Atwo od reloc a ted the S w itch, Thermosta t a nd EC O that w a s insta lled on the

ba ck of comb ina tion 6 a nd 10 ga llon G a s/Elec tric Wa ter Heate rs. A do uble sw itch is

now loc a ted inside the RV for convenience and a joint ECO a nd T-Stat is loc ated on

the g as side of the w a ter heater. This lea ves only the relay a nd hea ting element on the

backside of the water heater.

Eac h of the ma nuals within this se ries offers a ge neral overview of the product a s w ell

as more specific product information. For each product within the manual, you will

find model identification, recommended tools and equipment, a sequence of

operation, wa rnings , a nnual ma intenanc e proced ures , pa rts a nd troubles hootingguides , w arra nty proc edures, flat rate s ched ules , a nd replac ement pa rt reference

charts.

Due to the rapidly c hang ing persona l computer revolution w e ha ve plac ed

troubles hooting information in a variety of place s to ma ke sure tha t the mos t a cc urate

information is a vaila ble. The b es t pla ce to find the current informa tion a bo ut Atw oo d

products is our website: www.atwoodmobile.com. At our website brochures may be

do wnload ed, trouble s hooting guides review ed a nd the lates t information bulletins ca n

be read. In addition all Atwood Authorized Service Centers are listed on our site,

ac ces sible via an ea sy-to-use s earch system.

S ervice for all Atwo od prod ucts is hand led out of our Roc kford loc ation. S hould youhave any q uestions reg arding our prod ucts or the informa tion c onta ined in this

ma nua l simply dia l 1-800-825-4328. Be sure to have the Model a nd Serial Number whenyou call.

Atwood Service Department

Disclaimer: The data presented in this publication is obtained from the most reliable sources, and is believed to be accurate as of thedate of publication. Responsibility for typographical errors or omission of data cannot be assumed by the publishers.


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NOTES

THIS PAGE INTENTIONALLY LEFT B LANK


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TABLE OF CONTENTS

Atwood Water Heaters

Atwood Letter 1

Aftermarket Model Identification 4

Pilot Models

Ques tions 5Model Number Expla na tion /Fea tures 6

Recommended Tools &Eq uipment 7

G a s Thermos ta t C ontrols &P ilot Assemblies 8

P ilot S eq uence of Opera tion 9

P ilot &Ma in Burner 10

Trouble S hooting G uide 11

Engine Hea t Excha nge S ys tem /Afterma rket Hea ting Elements 12

Bolt-In Heating Element, Thermostat &ECO /110 VAC Trouble Shooting Wiring Sc hematic 13

Sc rew-In Heating Element, Thermosta t &ECO /110 VAC Trouble S hooting Wiring S chematic 14

Electronic Ignition Models

Ques tions 15

Model Number Expla na tion /Fea tures 16

Recommended Tools &Eq uipment 17

DS I S eq uence of Opera tion 18

Trouble S hooting G uide - Electronic Ig nition 19-20

Informa tion G uide - Intermittent Ignition 21-22

P otted Cha nnel C ircuit B oa rds /Therma l Cut Off Device /Thermos ta t 23

Wiring S chema tics 24

General Water Heater Information

Ques tions 25

Pressure Tempera ture Relie f Va lve /Water Hea ter Tank Corros ion /Atwood Clad Tank 26

Flushing Ta nk /Winterizing Ins truc tions 27

Wa ter Hea ter Terminology 28

Warranty 29

Warranty Procedures 29

Return Goods Policy (RETURN ADDRESS) 30

Flat Rate Schedule 31

Pilot Water Heater Parts Breakdown 32-34Replacement Part Reference

G10B, G10C /G610-3B, GH610-3 /G4SM /G6A-2, G6A-3, G6A-6, G6A-6P, G6A-7, G6A-7P /GC6A, GC6A-3,

G C 6A-6, G C6A-7 /G H6-3, G H6-6, G H6-7 /G C6AA-7, GC 6AA-7P / GC 6AA-8, GC 6AA-8P / G610-3,

GC 10-1, G C10-2, GC 10-2P /G C10A-2 /G C10A-2P /G 10-1, G10-1P, G10-2, G10-2P

Electronic Ignition Water Heater Parts Breakdown 35-37Replacement Part Reference

G610-3E, GH610-3E /GCH6-4E, GCH6-6E, /GC6A-7E /GC6AA-7E /GC6AA-8E /GC6AA-9E, GC6AA-10E

G 6A-2E, G6A-3E, G6A-4E, G 6A-6E, G6A-7E, G6A-8E /G 6A-3E, GH6-3E /G H6-4E, GH6-6E, G H6-7E,

GH6-8E /G CH6A-7E, GC H6A-8E, GC H6A-9E /G CH6A-10E /

GCH10A-2E, GCH10A-3E /GCH10-4E /G10-1E /GH10-2E, GH10-3E / GC10-1E, GC10-2E /GC10A-2E /

GC 10A-3E /G C10A-4E

Service Tank Kit Part Numbers 38

Marine Water Heater Parts Breakdown 39

Atwood Training Tapes and Manuals ORDER BLANK


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Aftermarket Gas Water HeatersIncludes Doors & Switches (when appropriate)

G6A-7 ----------------------------------6 gal. w/pilot

GC6AA-8 ------------------------------6 gal. combo w/pilot

GC6AA-10E ----------------------------6 gal. electronic gas combo

GCH6A-10E----------------------------6 gal. electronic gas combo w/heat exchangeG6A-8E --------------------------------6 gal. electronic

GH6-7 ----------------------------------6 gal. w/pilot, heat exchange

GH6-8E --------------------------------6 gal. electronic w/heat exchange

G10-2----------------------------------10 gal. w/pilot

GC10A-2------------------------------10 gal. combo

G10-3E--------------------------------10 gal. electronic

GC10A-4E ----------------------------10 gal. electronic combo

GCH10A-4E --------------------------10 gal. electronic combo w/heat exchange

Marine Water HeatersEHM6-4WFHX ------------------------4 gal. marine, front heat exchange & special hook-upEHM6-SMFHX ------------------------6 gal. electric marine w/heat exchange

H6-FHX --------------------------------6 gal. marine special

EHM6-ATC ----------------------------6 gal. marine, heat exchange & temp. control

EHM6-SMSS --------------------------6 gal. marine, rear heat exchange & special hook-up

EHM11-SSDHXT --------------------6 gal. marine, stainless steel dual heat exchange tube

EHM11-SMFHX --------------------11 gal. electric marine w/heat exchange

EHM11-SST--------------------------11 gal. electric, heat exchange stainless steel tank

H11-FHX------------------------------11 gal. marine special

EHPM10 ------------------------------11 gal. electric marine w/special tube

EH-20----------------------------------20 gal. electric marine w/heat exchange

E20 ------------------------------------20 gal. electric marine

M arine International Water HeatersEHM6-220-FHX ----------------------6 gal. marine, heat exchange, 220 volts

EHM6-220SST ------------------------6 gal. marine, heat exchange, 220 volts, stainless steel housing

EHM6-220-FHX ----------------------6 gal. marine, heat exchange, 220 volt, 1000 watt element

EHM11-220--------------------------11 gal. marine, heat exchange, 220 volts

EHM11-220SST --------------------11 gal. marine, heat exchange, 220 volts, stainless steel housing

EHM11-220SS-4WFHX ----------11 gal. marine, heat exchange, w/special hook-up

EHM11-220SS-IMFHX ------------11 gal. marine, heat exchange, 220 volt, 1000 watt element

EH20-220 ----------------------------20 gal. marine, heat exchange, 220 voltsE20-220 ------------------------------20 gal. marine, 220 volts

European Water HeatersEURI6A-6E ----------------------------6 gal. International Electronic 3-bar valve

EURIH6-6E ----------------------------6 gal. International Electronic w/heat exchange

EURICH6-6E --------------------------6 gal. International Electronic Combo w/heat exchange


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PILOT M ODELS

QUESTIONS

The following questions should be answered during this portion of the manual:

Are the Robertsha w a nd White Rodg ers thermosta t ga s c ontrol valves inter-cha ngea ble?

What is the minimum ga s press ure required for proper wa ter heater opera tion?

Where on the wa ter heater ga s c ontrol ca n gas press ure be tested ?

Ca n the pilot flame b e ad justed?

Wha t is minimum millivolt output of the thermoc ouple req uired for proper ga s c ontrol ope ration?

How ca n you test a thermoco uple?

How tight should the thermoco uple co nnection be a t the ga s c ontrol?

What is an E.C. O., where is it loc a ted a nd w ha t is its function?

What is a proper ma in burner a ir shutter ad justment?

What is the proper control a nd ma in burner a lignme nt?

How c an you ea sily chec k the ca libration of a c ontrol?


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Atwood 6 and 10 gallon Pilot Water HeatersAtwood water heaters are designed and approved for use only in recreation vehicles (travel trailers, 5th wheels,

moto r homes , etc .). They a re offered in two s izes : 6 and 10 ga llon c a pa cities .

TYPE OF GAS IGNITION -

This unit is ignited outs ide of the tra iler by a ma tc h, piezo ignitor or other ignition device . The w a ter

temperature is a djusta ble at the thermosta t c ontrol.

EXPLANATION OF MODEL NUMBER:

Pilot Models

G C H 6 AA - 7 P

P ilot Relig ht

Version

Type of hea ting element

(G C _ A - _ = bo lt on, G C _ A A-_ = s crew in)

Gallon capacity (6 or 10)

Engine Heat Exchange

Combination gas and 110 VAC electric

Propane Ga s

NOTE: When replac ing the e lement o n a co mbination ga s/110 VAC unit, a lw a ys chec k the ba ckof the hea ter for the type o f element it has . It will either be a bo lt-on or sc rew -in

element. They a re no interchang ea ble.

FEATURES All units operate on propane gas.

A hea t excha nge o ption is a vaila ble for motor homes. The wa ter heater tank must ha ve fac tory eq uipped

heat excha nge tubes welded on it a lrea dy. They ca nnot be a dde d later. A new wa ter heater tank with this

option is the only way to obtain this feature. Skin mounting allows the water heater to be hooked up with plumbing and electrical before the sidewall is

erected.

The ta nk has a clad aluminum lining tha t protects a ga inst c orrosion and does not need to be repla ced on

a yearly or more frequent basis like anode rods do. A more detailed explanation of cladding is found in the

ba ck of this ma nua l.

95% of all servicing can be done on the outside of the water heater. 110 VAC heating components are the

exception since they are located on the back of the water heater inside the trailer.

A flush flange is a vaila ble for all mod els. This ma kes the a cc es s do or flush w ith the trailer sidew a ll.

There a re multiple prote ct ion fea tures in the form of a press ure-temp era ture relief va lve, a limit sw itc h in

the gas thermostat and an externally sealed combustion chamber.

On combina tion wa ter heaters, the ga s mod e a nd the 110 VAC hea ting mode c an be o pera ted a t the same

time since each mode has its own thermostat.

Both the six and ten gallon units have the lightest weight in the industry.

On a ll tra ilers purcha se d a fter J une 1, 1997 Atw ood Limited Wa rra nty is for a period of tw o ye a rs. This

includes all rea sona ble la bor cha rges .

We ha ve 650+ S ervice Centers throughout the United S tates .


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Recommended Tools and Equipment

U-Tube Manometer - This is the mo st a cc ura te d evice for meas uring g a s p ress ure. If you use a dial-typema nometer, it should be ca librated period ica lly w ith this type o f ma nometer.

Thermostat Wrench - This tool a llow s for eas ier and sa fer remova l of the ga s thermos tat control. Ana djusta ble version for d ifferent size co ntrols is a vailab le through mo st RV distributors o r you ma y fa brica te o ne

from a ngle iron. We do not reco mmend using a pipe w rench b eca use it may da mag e the co ntrol caus ing it to

go out of ca libration.

Multi-meter - This is the m os t versa tile me ter and will tes t AC vo lta ge a nd c ontinuity. A co ntinuity tes t ca n beused to test for a blown E.C.O. on a g as control.

Magnet Assembly Thermocouple Tester - This a ss embly ca n be o bta ined a t an electronics or hardw a re sto reThis s a me a ss embly ca n also b e removed from a Rob ertshaw co ntrol. It will verify if a thermoco uple is go od .

For tes ting, s crew a thermoc ouple into the tes ter, hea t the thermocouple for 25 se co nds and then press the

plunger do wn. If the plunger pops up in les s tha t 25 seco nds , the thermocouple is fa ulty.

Common Hand Tools - 1/8 a nd 1/4 nut drivers, open e nd w renches , flat blad e a nd P hillips sc rew drivers.

Leak Test Solution - A solution that bubbles when applied to gas fittings or connections showing when a gasleak is present.

THERMOSTAT WRENCH

76543210

1234567

Manometerconnection

Correctwa terlevel

Fill here

U-TUBE M ANOMETERwith 1/8 pipe nipple

M ULTI-M ETER TO TESTAC VOLTAGE AND CONTINUITY

MAGNET ASSEMBLY TO TESTTHERMOCOUPLE


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Gas Thermostat Controls and Pilot Assemblies

Only tw o ma kes of ga s c ontrols ha ve been used on our pilot mod el water heaters. They a re the Robertsha w

Unitrol a nd White Rod ge r (formerly J a de or ITT).

The Ro be rtsha w c ontrol ca me in tw o d ifferent s izes of g a s inlets: 3/8inverted fla re and 3/8 N.P.T. The

inverted inlet c ontrol is no longer a va ila ble. Therefore, the w a ter hea ter ga s line c onnec tion w ill ha ve to be

mod ified to 3/8 N.P.T. in order to us e the c urrent R ob ertsha w c ontrol.

The White R od ge r co ntrol is the va lve w e a re using o n a ll prod uct ion to da y. Formerly it had a 3/8N.P.T.

inlet. Now it is only a va ila ble w ith a 1/4inlet. This improvem ent e limina tes the a da pter fitting into the c ontrol

a llow ing the use o f only a s ingle 45 de g ree elbow (3/8fla re x 1/4N.P.T.). If yo u a re replac ing a current 1/4

inlet mo de l control w ith a ea rlier mod el 3/8inlet c ontrol you ma y ha ve in stoc k, the a da pter fitting tha t

mates the control and elbow fitting is still available.

Although the controls appear quite different in size, the White Rodger and Robertshaw control are

intercha nge a ble. Their ma nifolds w ill bo th line up w ith the b urner tube prope rly.

Bo th controls have a port to test ga s press ure through the va lve. This ca n be ac complished by removing the

co ver sc rew a nd inserting a 1/8 pipe nipple. After atta ching your ma nomete r hose to this fitting, the

ma nometer s hould reg iste r 10 W.C . through the valve w hile it is opera ting.

There a re tw o m a in pilot a ss emb lies that you w ill encounter in the field.

The first is a n ea rlier mode l Robertsha w pilot a ss emb ly w ith a 1/4pilot g a s line tha t mounted on the left

side of the ma in burner.

The c urrent pilot is the J a de a ss emb ly w ith a 1/8pilot g a s line a nd it mounts on the right s ide of the ma in

burner.

The Rob ertsha w pilot is no long er ava ila ble and the J a de pilot must b e sub st ituted. When insta lling a J a de

a ss embly in pla ce of a Robertshaw as semb ly, if there is not a loca tion on the right s ide of the ma in burner to

mount the J a de pilot, a new burner that ha s the proper mounting holes w ill ha ve to b e purcha sed .

Note: The size of the ga s line do es not ha ve

any affect on the size of the pilot flame. Only

the gas pressure and pilot orifice regulate the

height of the pilot flame.

ROBERTSHAW UNITROL

3/8 Inverted inlet3/8 N.P.T. outlet(no longer available)

3/8 N.P.T. inlet3/8 N.P.T. outlet

WHITE RODGERS (JADE, ITT)

3/8 N.P.T. outlet(no longer available)

1/4 N.P.T. inlet3/8 N.P.T. outlet(replaces all Robertshaw

and J ade controls)

JADE ROBERTSHAW(obsolete, replace with J ade)


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Pilot Sequence of Operation

PILOT OPERATION

Gas Pressure 11 W.C. to control is necessary. Set with two gas appliances running.

Gas Control supplies gas to pilot orifice when control ON/OFF pilot knob is held at pilot position.

Pilot Orifice meters gas to heat thermocouple. Flame should be high enough to engulf thethermocouple.

Thermocouple generates millivoltage to the gas controls magnet assembly.

Magnet when it receives 12 millivolts or more it allows gas to flow freely to pilot withoutholding pilot knob.

E.C.O. passes millivolts through the gas control and back to thermocouple. Tripspermanently open if water temperature exceeds 190F.

MAIN BURNER OPERATION

Gas Control supplies gas to main burner when control knob is set to ON position and thetemperature lever is set to desired temperature after pilot is lit.

Ma in Burner Orifice meters gas through burner tube.

Ma in Burner pilot ignites gas when it reaches end of this tube. Flame height adjusted by sliding airshutter. Ideal setting is 1/4 way open (.20 ). Flam e s hould b e prima rily blue w itha tra ce of yellow.

Temperature Knob setting of knob determines burner cycle and water temperature. Temperature range is70F - 140F.

Pilot Flame

Thermocouple

ON/OFF Pilot Knob

Air Shutter

ONE SHOTE.C.O. 1 90 Gas Inlet

11" W.C.Pressure

JADE CONTROL SYSTEM

Temperature Lever

Pilot Orifice (i nside)


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Pilot and Main Burner

Pilot AdjustmentOnly the gas pressure, gas valve and the pilot orifice regulate the height of the pilot flame. Early model gas

co ntrols ha ve a pilot a djustm ent s crew, b ut this sc rew has very little effect on the p ilot. The pilot

a djustme nt has bee n removed from the c urrent White Rod ge r control. The fla me s hould b e high eno ugh to

engulf the thermoco uple a t a ll times . A pilot flame a ny larger co uld blow the E.C .O. in the g a s co ntrol. This

is typically the result of enlarging the pilot orifice hole with a pin or similar item. For further correctivemeasures, refer to the trouble-shooting guide.

M ain Burner AdjustmentThe g a s press ure, a ir shutter clea nliness of the burner tube a nd o rifice regula te the ma in burner fla me. The

main burner flame should be mainly blue with a trace of yellow and fairly quiet. If it is not, adjust the gas

press ure to 11 W.C. , ens ure tha t the ma in burner air shutter is 1/4 w a y op en a nd verify tha t the ma in

burner flame spreader is square to the end of the main burner. For further corrective measures, refer to the

trouble-shooting g uide .

Main Burner AlignmentThe ma nifold a nd ma in burner sho uld b e a s perfectly aligned a s po ss ible. In other w ords, the g a s va lve

sho uld b e rotated a t the sa me a ngle as the ma in burner tube. If it is not, rota te the ga s c ontrol a nd/or the

orifice holder so that the orifice disperses gas straight down the center of the burner tube. If the valve must

be ba cked off any, check for wa ter lea ks at the coupling the c ontrol screws into before you operate the

wa ter heater.

Pilot Flame

Thermocouple

On/Off Pilot Knob

Air Shutter

Temperature Lever

Flame Spreader

Burner Tube

GasValve

OrificeHolder

MainBurnerTub

e

(orientation found in water heater)


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Guides are only intended for use on Atwood products by service technicians who have successfully completed

Atwood training. This guide s hould be use d in conjunction with the app ropriate Instruction Manua l provide d w ith theprod uct and any a pplica ble Industry stand ards. This is not intended to be a c omplete list. P lea se d irect q uestions

co ncerning s ervice of Atwoo d products to 800-825-4328 before proceeding.

CAUSE SOLUTION

PILOT OUTAGEGas pressure incorrect --------------------------Set pressure to a minimum of 11 W.C. with two or more appliances runningBlocked U tube --------------------------------Remove obstructionImproper main burner alignment --------------Re-align main burner and main burner orifice holder and gas valveImproper air adjustment ------------------------Adjust main burner air shutter approximately 1/4 openWeak thermocouple------------------------------Replace thermocouplePoor pilot flame ----------------------------------Clean or replace pilot orificeWeak gas control magnet ----------------------Replace gas controlDefective E.C.O. in control ----------------------Replace gas control and check the pilot flame. It should be high enough to engulf

the thermocouple at all times.PILOT OUTAGE WHEN BUTTON OR KNOB IS RELEASED

Thermocouple not hot --------------------------Hold button or knob for 30 seconds before releasingThermocouple loose ----------------------------Tighten connection at gas controlWeak thermocouple------------------------------Replace thermocoupleWeak gas control magnet ----------------------Replace gas controlDefective E.C.O. in control ----------------------Replace gas control

MAIN BURNER WILL NOT IGNITEBlocked main burner orifice --------------------Clean or replace orificeMain burner flame spreader mis-alignment --Square flame spreader to end of main burnerBlocked main burner ----------------------------Remove blockageImproper air adjustment ------------------------Adjust main burner air shutter approximately 1/4 openBlocked U tube --------------------------------Remove blockageGas control out of calibration ------------------Replace gas control

ERRATIC M AIN BURNER FLAMEImproper gas pressure--------------------------Set inlet pressure to a minimum of 11 W.C. with two or more appliances runningImproper air adjustment ------------------------Adjust main burner air shutter approximately 1/4 openPartial blockage of main burner ----------------Remove blockagePartial blockage of main burner orifice--------Clean or replace orificeFlame spreader misaligned----------------------Re-align spreader or replace main burnerBlockage in U tube ----------------------------Remove blockagePoor gas supply----------------------------------Replace gas supplyExhaust grille blocked --------------------------Remove blockageImproper main burner alignment --------------Re-align main burner, main burner orifice holder and gas valve

SMOKING AND SOOTINGGas pressure incorrect --------------------------Set pressure to a minimum of 11 W.C. with two or more appliances runningPoor gas supply----------------------------------Replace gas supply

Improper pilot flame ----------------------------Clean or replace pilot orificeImproper air adjustment ------------------------Adjust main burner air shutter approximately 1/4 openFlame spreader mis-aligned --------------------Re-align or replace main burnerBlocked main burner ----------------------------Remove blockageImproper main burner alignment --------------Re-align main burner, main burner orifice holder and gas valveBlocked U tube --------------------------------Remove blockage

INSUFFICIENT WATER TEMPERATURETemperature selector out of place--------------Re-set to desired positionBypass levers improperly positioned ----------Reposition leversImproper air adjustment ------------------------Adjust main burner air shutter approximately 1/4 way openPartial main burner blockage ------------------Remove blockageImproper main burner adjustment ------------Re-align main burner and main burner orifice holderFlame spreader mis-aligned --------------------Re-align or replace main burnerBlocked U tube --------------------------------Remove blockage

Pilot Water Heater

TROUBLE SHOOTIN G GUIDE

Effec tive: 5/26/98


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Engine Heat Exchange System

The engine hea t excha nge s yste m a llow s a moto r home to hea t the w a ter while traveling. This c onvenient

option allows you to arrive at your destination with hot water. Operating a pilot or electronic water heater on

ga s w hile in trans it is a da ngerous pra ctice.

This s ystem c onsists o f a U-sha ped a luminum tube tha t is a ttac hed to the o utside o f the tank with welds. S AE

hoses are attached to both ends of this tube and are spliced into the engine coolant system.

When the engine is running, the hot coolant flows past the tank through this tube and by means of heat

trans fer through the w elds, hea ting the w a ter. The des ign of this sys tem w ill not a llow the w a ter to rea ch a

bo iling p oint. It will typica lly hea t the w a ter to a bo ut 130 F. in ab out 2-3 hours of d riving.

Customer supplied SAE 053 A type"E" hose clamp

or evuivalent

Heat Exchanger Tubes

Annualar Grove

Heat ExchangerTubes

Coolant System Hose(5/8" dia. SAE 20R3or equivalent)

Customersupplied tee

Temperatures produce d by these heating elements

ca n exc eed the 190F. limit of t he EC O on pilot m od el

ga s c ontrol va lves. This g a s c ontrol valve conta ins a

one-shot ECO. When this ECO blows, the control is

completely non-functional and must be replaced.

THIS WILL BE A NON-WARRANTABLE SITUATION.

When Aftermarket hea ting e lements a re inserted

into the drain plug, customers are more prone not

to flush their tanks. Not flushing the ta nk

a cc elerates tank corrosion on b oth our pilot a nd

electronic ignition water heaters creating a situation

where the tank may have to b e replac ed. THIS WILL

BE A NON-WARRANTABLE SITUATION.

Aftermarket Heating Elements

WARNINGEXPLOSION / BURN INJURY

Aftermarket hea ting elements ca n la ck critica l sa fety controls.

Use of these devices ca n lea d to a n out of control heating of wa ter tank and a

ca tas trophic w et side explosion.

YOU DO NOT NEED AN AFTERMARKET HEATING ELEMENT ON AN ATWOOD WATER HEATER. THE USE OF AFTERMARKET HEATINGELEMENT DEVICES MAY ALSO RESULT IN DAMAGE TO COMPONENTS OR WATER HEATER. Atwoods w ritten wa rranty s tates

- failure or damage resulting from any alteration to our water heater is the owners responsibility. ANY

ALTERATION, LIKE THE ADDITION OF AN AFTERMARKET HEATING ELEMENT DEVICE, WILL VOID THE WARRANTY.


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Ground

Switch

Element

Fixed Thermostat

Manual ResetHigh TemperatureLimit Switch

( 3 )-GREEN

( 1 )-BLACK BLACK

( 2 )-WHITE BLACK

Hot Lead

Ground Lead

Common Lead

Early mo de l wa ter hea ters w ith 110 VAC hea ting

capacity used a bolt-on heating element and a one

piece thermos ta t/E.C.O..

This 110 VAC sy ste m ha s a n a djusta ble rec ta ngular

thermosta t that is surfac e mounted to the inner tank

a nd reta ined b y a ste el clip. The tempe rature settings

a re HI, MEDIUM, a nd LOW. If the thermos ta t is

ma king unobs tructed conta ct with the aluminum tank

and it is set to the HI position, it should heat the water

to 130 F. It w ill take longer to heat a tank of wa ter on

electric than gas.

The hea ting e lement w a s cha nged in 1996 from

1500W to 1400W bringing the amperage draw down

to 12.7 amps and allowing more cushion for the

15 amp circuit breaker that is normally placed in line.

This c hange ad ds a few minutes to the hea ting time.

There a re 110 VAC a fterma rket c onvers ion kits b eing

offered by distributors in w hich the hea ting e lement is

screwed into the tank where the drain plug is located.

We d o no t offer suc h a kit. Our kit includes the ta nk

with the 110 VAC components already installed in it.

In the case where the 110VAC portion of the water

heater is not heating water, the following diagnostic

steps a nd repa irs should b e investiga ted:

Turn POWER OFF to the appliance beforeremoving junction box cover.

Perform the following steps with POWER ON towater heater.

1. Verify switch-A is in ON position.

2. Insure there is 110VAC to the unit (mea sure

voltage across the black and white lead to the

a pplia nce with P OWER ON). If none, tra ce w iring

back and make appropriate wire repair.

Perform the following steps with POWER OFF towater heater.

3. ECO Re-set B utton-D should b e depress ed.

4. Check for continuity betw een sc rew-B and sc rew -

C of thermos ta t. If none, replac e thermosta t.

5. If w a ter is insufficiently hot, chec k ECO /

Thermos ta t-E is o n high.

6. Verify a g ood wire co nnection betw een thermosta t

sc rew -C a nd hea ting element sc rew-G . Co rrect if

necessary.

7. There should b e c ontinuity b etw een hea ting

element screw -G a nd sc rew -F. If none, element is

ba d a nd s hould b e repla ced . Do not over-tighten

self-tapping screws when installing new element.

8. Check for continuity between element screw-G

and flange of element. If there is, element has

shorted. Element should be replaced.

9. Verify ground c onnec tion.

NOTE: Heating element can be operated on an emptytank for a limited period of time before it self destructs.

BOLT-INHeating Element, Thermostat & ECO

110VAC Trouble-ShootingWiring Schematic

Temperature

Adjustment Dial

ECORe-Set

Button

UP


14/40

14

Current produc tion w a ter hea ters w ith the 110 VAC

heating option use a screw-in heating element, asepa rate pre-set thermostat and a sepa rate ECO.

The s crew -in hea ting element is rated a t 1400 wa tts

just like the bolt-on element. It is an incalloy element

and can be run for a limited amount of time in a dry

tank without shorting out.

C AUTION: If the he a ting element is a llowe d t o run

with a dry tank, allow the tank to cool down for 2-3

hours before adding water. Adding water before

the tank cools sufficiently could collapse the tank.

The thermosta t and EC O are pre-set s urfac e-mounted

disc s. The thermostat is s et at 140 F and is the samethermosta t used on the ga s side of the electronic

ignition w a ter heate rs. The ECO is a ba ckup

thermostat and will trip if the thermostat fails and the

wa ter temperature exceeds 170 F.

When the 110VAC portion of the water heater is not

heating wa ter, the follow ing d iag nostic steps andrepairs should be investigated:

Turn POWER OFF to the appliance before removing

junction box cover.

Perform the following steps with POWER ON towater heater.

1. Verify s w itc h is in ON po s ition.

2. Insure there is 110VAC to the unit (mea sure

voltage across the black and white lead to the

appliance with POWER ON). If none, trace wiring

back and make appropriate wire repair.

Perform the following steps with POWER OFF towater heater.3. Manual reset ECO high limit switch-A should be

depressed . C heck for continuity betw een

TERMINAL B and TERMINAL C of ECO.

4. Check for continuity between TERMINAL D and

TERMINAL E of thermostat. If there is none, replace

thermostat.

5. If water is insufficiently hot, insure thermostat is

flush with tank.

6. Verify a g ood w ire c onnec tion be tw een ECO

TERMINAL-C a nd hea ting element TERMINAL-F.

Co rrect if neces sa ry.

7. Check for continuity between heating element

TERMINAL-F and TERMINAL-G. If none, element is bad

and should be replaced. Do not over-tighten self-

tapping screws when installing new element.

8. There s hould NOT BE CONTINUITY betw een element

screw-G and flange of element. If there is, element

has shorted. Element should b e repla ced .

9. Verify g round c onne ct ion.

NOTE: Heating element ca n be operated on an emptytank for a limited period of time before it self destructs.

Ground

Switch

Element

Fixed Thermostat

Manual ResetHigh TemperatureLimit Switch

( 3 )-GREEN

( 1 )-BLACK BLACK

( 2 )-WHITE BLACK

Hot Lead

Ground Lead

Common Lead

SCREW-INHeating Elem ent, Thermostat & ECO

110VAC Trouble-ShootingWiring Schematic

UP

G C DF B E

A


15/40

15

ELECTRONIC IGNITION MODELS

QUESTIONS


What is minimum ga s press ure for proper w a ter heater operation?

Where on the ga s s olenoid valve ca n ga s pressure be tested ?

What is the minimum volta ge nee ded for opera tion?

Wha t is the prope r w iring hoo k-up for the w a ter hea ter circ uitry?

C a n the Circuit B oa rd Tes ter be use d on both Fenwa l a nd Cha nnel circuit bo a rds ?

How c an the C ircuit Boa rd Tester be used to chec k a " flying lea d" circuit boa rd?

What co nditions c a n ca use tra cks on the bac k of the circuit boa rd to blow?

What is a proper ma in burner a ir shutter a djustm ent?

Wha t is the function of the thermal cut-off?


16/40

16

Atwood 6 and 10 gallon Electronic Ignition Water HeatersAtwood water heaters are designed and approved for use only in recreation vehicles (travel trailers, 5th wheels,

moto r homes , etc .). They a re offered in two s izes : 6 and 10 ga llon c a pa cities .

TYPE OF GAS IGNITION -

This unit is ignited ins ide of the trailer by a remote ON/OFF sw itch. The wa ter tempera ture is preset a t 140 F.

EXPLANATION OF MODEL NUMBER:

Electronic ModelsG C H 6 A - 9 E

Elec tronic Ignition

Version

Type of hea ting element

(G C _ A - _ _ = bolt on, G C _ A A-_ _ = s c rew in)

Gallon capacity (6 or 10)

Engine heat excha nge

Co mbination ga s a nd 110VAC electric

Propane Ga s

NOTE: When replac ing the e lement o n a co mbination ga s/110 VAC unit, a lw a ys chec k the ba ckof the hea ter for the type o f element it has . It will either be a bo lt-on or sc rew -in

element. They a re not interchang ea ble.

FEATURES All units operate on propane gas.

A pre-se t thermosta t se t for 140 F. An afterma rket retro-fit a djusta ble thermos ta t is a vaila ble and

ad justable from 110 to 150 F.

A heat excha nge o ption is a vaila ble. The w a ter heater tank must have fa ctory eq uipped hea t excha nge

tubes w elded on it a lrea dy. They ca nnot be a dd ed late r. A new w a ter heater ta nk w ith this fea ture must b e

insta lled to use the hea t excha nger.

Skin mounting allows the water heater to be hooked up with plumbing and electrical before the sidewall is

erected.

This hea ter has a co mpa rab le, if not s uperior, a node type protec tion for the ta nk. The ta nk is m a nufac tured

with a c lad aluminum lining tha t protects a ga inst c orrosion but does not need to b e replac ed yea rly a s a n

anode rod. A more detailed explanation of cladding is found in the back of this manual.

95% of a ll se rvicing is do ne on the o utside of the w a ter heate r. 110 VAC hea ting c ompo nents a re the

exception. Since they are located on the back of the water heater inside the trailer.

A flush fla nge is a vaila ble for all mod els. This m a kes the a cc es s do or flush w ith the s idew a ll.

There a re multiple prote ct ion fea tures in the form of a press ure-temp era ture relief va lve, a limit sw itc h in

the gas thermostat and an externally sealed combustion chamber.

Both the six and ten gallon units have the lightest weight in the industry.

On a ll tra ilers purcha se d a fter J une 1, 1997 the Atw ood Limited Wa rra nty is for a period of tw o ye a rs. This

includes all rea sona ble la bor cha rges .

We ha ve 700+ S ervice Centers throughout the United S tates .


17/40

17

Recommended Tools and Equipment

U-Tube Manometer - This is the mo st a cc ura te d evice for meas uring g a s p ress ure. If you use a dial-typema nometer, it should be ca librated period ica lly w ith this type o f ma nometer.

Multi-meter - This is the m os t versa tile me ter and will tes t co ntinuity a nd 12VDC . Thes e tes ts w ill a llow one toverify voltag e problems or faulty co mponents. The entire e lectronic sys tem c an be teste d with this meter.

Circuit Board Tester - The tes ter is c a pa ble of testing a ny of the circuit bo a rds (Fenwa l a nd C hannel mode ls)that we have used on our water heaters. It is a simple table top device that will diagnose the following items on

a circuit boa rd: pow er circuit, s ense circuit, s pa rk ge neration a nd the lock-out mode. For use on c ircuit boa rds

with a flying lea d co nnection, splice a wire into the b la ck w ire o f the tes ter harness with a 1/4 male terminal on

the free end .

Common Hand Tools - 1/8 a nd 1/4 nut drivers, open e nd w renches , flat blad e a nd P hillips sc rew drivers.

Leak Test Solution - A solution that bubbles when applied to gas fittings or connections showing where a gasleak is present.

7654

32101234567

Manometerconnection

Correctwa terlevel

Fill here

MULTI-M ETER TO TESTCONTINUITY & VOLTAGE

U-TUBE M ANOM ETERwith 1/8 pipe nipple

CIRCUIT BOARD TESTERMPD 32779


18/40

18

DSI Sequence of Operation

Gas Supply 11 W.C to solenoid valve is necessary

12VDC Battery Voltage source to water heateror filtered sideof Convertor

ON/OFF Switch It supplies 12VDC to water heater

Thermal Cut-Off A one shot heat sensing fuse thats normally closed and sends power to the thermostat.When tripped by excessive heat (190F), (i.e. blocked burner or flue tube) it cuts power to

the circuit board and shuts down ignition.

Thermostat A normally closed non-adjustable temperature switch that sends current to the circuitboard. It opens when the water temperature reaches approximately 140F.

Circuit Board The next step is the direct spark ignition system. For a period of 6-8 seconds the circuitboard will send voltage to both the gas solenoid valve and the electrodes. If ignition doesnot occur, the board goes into a lock-out condition and the non-ignition light illuminated atthe ON/OFF switch.

E.C.O.A normally closed safety temperature switch thatsends voltage to solenoid valve. The switch opens ifthe water temperature exceeds 180F.

Gas ValveThe dual solenoid valve that opens and sends gas toelectrodes when a minimum of 10.5 VDC is applied to it.

ElectrodesCreates a spark to ignite gas. If the electrodes do notsense a flame in 6-8 seconds, a signal is sent to theboard to shut the gas valve down and the system goesinto safety lock-out.

NOTE: If this situation exists, the ON/OFF switch must beturned off and back on again.


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Guides are only intended for use on Atwood products by service technicians who have successfully completed

Atwood training. This guide s hould be used in co njunction with the a ppropria te Instruction Manua l provide d w ith the

product and any a pplica ble Industry stand ards. This is not intended to be a c omplete list. P lea se direc t ques tions

co ncerning s ervice of Atwo od products to 800-825-4328 before proceeding.

CAUSE SOLUTION

WAT ER HEAT ER L OCK OUT - SPARK PRESENT BUT NO GAS

Gas pressure incorrect ------------------------------------------Set inlet pressure at a minimum 11 W.C. with two or more gasappliances running

Low voltage--------------------------------------------------------Correct power supply - 10.5 VDC minimumBlocked main burner tube --------------------------------------Clean burner tube

Blocked main burner orifice ------------------------------------Clean or replace orificeLoose wires on E.C.O.--------------------------------------------Secure wire connectionsLoose wire connections on solenoid valve --------------------Secure wire connectionsLoose valve wire on wiring harness ----------------------------Repair wire on edge connector or replace wiring circuit board harnessDefective E.C.O. --------------------------------------------------Replace E.C.O.Defective circuit board--------------------------------------------Replace circuit boardDefective solenoid valve------------------------------------------Replace coils or solenoid valveNo gas to solenoid valve ----------------------------------------Correct gas supplyDirty connector on circuit board --------------------------------Clean edge connector

WAT ER HEAT ER L OCK OUT - GAS PRESENT BUT NO SPARK

High tension lead wire loose ------------------------------------Secure wire connection on circuit boardElectrodes loosely attached to main burner ------------------Secure electrodes to main burnerImproper electrode gapping ------------------------------------Re-position spark gap to 1/8 and into path of flameDirty electrodes --------------------------------------------------Clean electrodesWires loose in electrode porcelain------------------------------Replace electrodesCracked porcelain on electrode----------------------------------Replace electrodesDefective circuit board--------------------------------------------Replace circuit board

WAT ER HEAT ER L OCK OUT - GAS AND SPARK PRESENT

Gas pressure incorrect ------------------------------------------Set inlet pressure at a minimum 11 W.C. with two or more gasappliances running

Low voltage--------------------------------------------------------Correct power supply - 10.5 VDC minimumPoor electrical ground--------------------------------------------Secure electrical groundElectrodes out of flame pattern --------------------------------Re-adjust electrodesElectrodes sparking to screw fastening burner to flue tube Adjust electrodes away from screwDirty electrodes --------------------------------------------------Clean electrodes

Partial obstruction in main burner ------------------------------Clean main burnerPartially obstructed main burner orifice------------------------Clean main burner orifice or replaceImproper air adjustment ----------------------------------------Adjust main burner air shutter approximately 1/4 openFlame spreader on main burner out of adjustment ----------Adjust flame spreader so that it is square to the end burner tube out

of alignment of the main burnerManifold not aligned with main burner ------------------------Re-align solenoid valve with main burnerPartially opening solenoid valve --------------------------------Replace solenoid valve

Defective circuit board--------------------------------------------Replace circuit board

Electronic Ignition Water He ater

TROUBLE SHOOTING GUID E

Effe c tive : 5/26/98

continued


20/40

20

Electronic Ignition Water Heater (continued) Effe c tive : 5/26/98

CAUSE SOLUTION

EXCESSIVE OR INSUFFICIENT WATER TEMPERATURES

By-pass kit valves not set properly ----------------------------Place valves in proper positionThermostat not seated against tank----------------------------Reseat thermostatDefective thermostat----------------------------------------------Replace thermostat

ERRATIC BURNER FLAME OR SOOTING

Low gas pressure ------------------------------------------------Set inlet pressure at a minimum 11 W.C. with two or more gasappliances running

Poor gas supply --------------------------------------------------Replace gas supplyImproper air adjustment ----------------------------------------Adjust main burner air shutter approximately 1/4 way open. Flame

should be mainly blue and quiet.Poor main burner alignment ------------------------------------Adjust valve and main burner alignmentMisaligned burner flame spreader ------------------------------Align flame spreader so it is square with end of burner tube.Blocked burner orifice--------------------------------------------Clean orifice. DO NOT enlarge orificeObstructed main burner------------------------------------------Clean main burnerObstructed U tube----------------------------------------------Clean U tubeObstructed exhaust grille ----------------------------------------Remove obstruction

NO SPARK AND NO GAS

No voltage --------------------------------------------------------Correct power supply - minimum 10.5 VDCDirty edge connector on circuit board--------------------------Clean edge connectorDefective thermal cut-off ----------------------------------------Replace thermal cut-offDefective ON/OFF switch ----------------------------------------Replace switchDefective circuit board--------------------------------------------Replace circuit boardDefective thermostat----------------------------------------------Replace thermostat


21/40

21

Guides are only intended for use on Atwood products by service technicians who have

successfully completed Atwood training. This guide s hould be use d in co njunction w ith

the a ppropriate Instruction Manual provided with the product and any app lica ble Industry

S tanda rds . This is not intended to be a c omplete list. P lea se d irect q uestions conc erning

service of Atwoo d products to 800-825-4328 before proceeding.

1. CHECK ALL OF THE WIRE CONNECTIONS.

P oor or corrod ed w ire c onnec tions ca use mo st o f the intermittent problems in wa ter heaters. You

sho uld g o through a nd pull a ll of the w ires off any s pa de co nnections. Then rec onnec t them a nd

ensure the co nnections a re tight a nd c orros ion free.

We w a nt to po int out two co nnections often o verlooked.

First, check the (green) ground wire of the circuit board. This w ire s crews do w n under

the circuit board mounting screw. If that screw for the board is loose, you may not have asecure ground.

Second, check the four wire edge connector going into the circuit board. Remove thecircuit boa rd . Ta ke a penc il eras er and clea n the ma rks o ff the c onne c tion of the c irc uit

board. Reconnect the four wire edge connector onto the circuit board and then immediately

remove it. Look at the edge connection of the board. You need to see four good scratches

in the co nnection. If you do not s ee four scratc hes, then you w ill need to repair the ed ge

connector or replace the wire harness.

2. CHECK THE INTEGRITY AND POSITION OF THE SPARK PROBE ASSEMBLY.

The ga p betw een the spa rking probe a nd the ground probe sho uld b e

1/8 inc h. The probe s s hould be c lea n a nd free of cra cks , fla king a nd

corrosion. Position the probes so that they are in the path of the gasflow. Cracks in the ceramic insulator can also be the source of an

intermittent p rob lem. To c hec k for cra c ks ins ert a fiber wa sh er or any

other type o f insula tion ma teria l in the 1/8 g a p b etw een the rod s.

Remove the ga s valve from the circuit a nd turn the unit on. If you s ee

a spa rk jumping from the ce ra mic to the g round rod or brac ket,

replace the spark probe.

3. CHECK THE ALIGNMENT OF THE MAIN BURNER TO THE ORIFICE.

P os ition the ma in burner tube (A) so that the g a s co ming o ut

of the orifice (B) is going straight down the middle of the

burner tube. If the a lignment is off, the ga s w ill bounc e d ow n

the tube w hich w ill a lter the g a s flow onc e it rea ches thespark. Manually shift the valve (C) with your hands to achieve

this alignment.

4. CHECK THE ALIGNMENT OF THE FLAME SPREADER ON THE BURNER TUBE.

At the end of the burner tube there is a dime-shaped deflector

disk. This disk sprea ds the fla me o ut for proper hea t d ist ribution.

Alig n the fla me s prea de r (A) so tha t it is pa rallel to the end of the

tube and positioned in the center of the end of the tube. If the

flame spreader is out of position, it could divert the gas away

from the spark and cause intermittent ignition.

INTERM ITTENT IGNITION

Electroni c Igni tion Water Heater

INFORMATION GUIDE

Effe c tive : 8/21/00

continued

1/8"

C B A

A

1/4 open


22/40

22

Intermittent Ignition Water Hea ter (continued) Effe c tive : 8/21/00

5. CHECK THE AIR ADJ USTMENT.

The burner tube ha s a n a djusta ble air shutter on it a t the end whe re it goe s over the orifice .

P os ition the a ir shutter so tha t it is 1/4 of the w a y open. We a re looking for a b lue fla me w ith

small traces of yellow in the flame. If the flame is fairly quiet then it is adjusted correctly.

6. CHECK THE CLEANLINESS OF THE ORIFICE.

The orifice is the hex hea d b ra ss fitting tha t is sc rew ed onto the bras s ma nifold of the va lve. You

will have access to this part once the burner has been removed. Remove the brass orifice andclean with isopropyl alcohol. NEVER enlarge the size of the orifice.

7. CHECK FOR OBSTRUCTIONS IN THE MAIN BURNER TUBE.

The c lea nliness of this tub e is very important. S pide r w ebs , so ot a nd o ther debris c a n

a cc umula te, ca using problems w ith ga s flow do wn the tube. We rec ommend cleaning the burner

tube w ith a b rush a nd not c ompress ed a ir. Co mpres se d a ir ma y not fully remove the ob struction.

8. CHECK THE CLEANLINESS OF THE FLUE TUBE.

The flue tube is the 2-1/2 inc h diame ter tube tha t sta rts a t the bo ttom rig ht co rner of the w a ter

hea ter (whe re the ma in burner fla me enters) a nd c omes out the top left. This tube c a n bec ome

bloc ked b y de bris like inse ct ne s ts o r so ot. To c lea n remo ve the me ta l flue bo x in the top left

co rner of the w a ter heater. To fa cilita te c lea ning unfold a wire ha nger, w ra p a ra g a round the enda nd use this to s wa b out the tube.

9. CHECK THE VOLTAGE TO THE VALVE.

Make sure tha t the volta ge to the g a s s olenoid valve is b etw een 10.5 a nd 13.5 volts DC . Volta ge

drops c a n occ ur a t almost a ny comp onent. Turn on ano ther twe lve volt ap plia nces w hen you

chec k the volta ge s o tha t you ca n see ho w the c onverter is w orking w ith a load . The volta ge

itself can be intermittent. With linear converters the 12 VDC varies depending on the 115 VAC.

If the 115 VAC is high then the 12 VDC will be high, and if the 115 VAC is low then the 12 VDC

w ill be low. If the po we r to the w a ter heate r is co nnecte d to the unfiltered side o f the c onverter,

move it to the filtered side.

10. CHECK THE GAS PRESSURE OF THE RV.Make sure the gas pressure of the RV is checked with preferably the furnace and the range on

to s imula te a loa d. The pres sure should b e 11 inch w a ter column under loa d. B es ide s g a s

pres sure being a t the proper level there a re othe r stra nge things that ca n ha ppen inside ga s lines

that ca use intermittent prob lems . We ha ve se en oil build up in a ga s line tha t mea nt there w a s

good pressure to one appliance but not the correct pressure to another appliance. Moisture

could also build up in the gas line that would freeze and partially block the line. Intermittent

pres sure from the reg ula tor of the bo ttles is still a nother area that sho uld be investiga ted.

11. INTERMITTENT CIRCUIT BOARD.

If you have gone through all of the above checks and the intermittent problem is still occurring,

only then c heck the c ircuit bo a rd. Ensure the c ircuit boa rd is c lea n a nd reas ona bly moisture free

before you change it.

There a re tw o ma jor points tha t s hould have sto od out to you from this list.

First, the majority of intermittent ignition problems on Atwood electronic ignition water heaters

can be corrected by cleaning certain components or making simple adjustments.

S ec ond , ignition p rob lems ca n be found in other compo nents than the c ircuit boa rd. The c ircuit

bo a rd is not the end a ll s olution to ignition problems . This minds et developed a num be r of yea rs

a g o w ith the introd uction of the first c irc uit bo a rds tha t w ere not very relia ble. Weve lea rned a lot

since t hen. Tec hnolog y ha s p rog res s ed ma king to da ys circ uit bo a rds very relia ble. The c irc uit

boa rd c an o nly do wha t the other compo nents of the wa ter heater allow it to d o.


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23

* * POTTED CHANNEL CIRCUIT BOARDSAtwo od **potted circuit boa rds ca n be te sted using a

multi-meter. This tes t mus t be p erformed w ith the

circuit board removed, and the meter set to the ohmssc a le. This w ill chec k the co ntinuity of a ll tra cks on

the harness c onnection of the bo ard.

The following steps should be used to test each track.

A. Cross leads of meter to ensure it is registeringcontinuity.

B. TO TEST POWER TRACK:Place negative lead of the multi-meter to ground (greenwire) track of edge connection and positive lead of themulti-meter to top power (brown wire) track of edgeconnection. If no continuity, board is defective. *Atwooddoes not warranty this installation related failure.

C. TO TEST LAMP TRACK:Place negative lead of the multi-meter to ground (greenwire) track of edge connection and positive lead of themulti-meter to lamp (blue wire) track of edgeconnection. If no continuity, this indicates blown lamptrack. Circuit board will still fire unit but lamp light willnot come on. This is caused by a short in the blue wirebetween the unit and the switch. Wiring must becorrected before the board is replaced. *Atwood doesnot warranty this installation related failure.

D. TO TEST VALVE TRACK:Place negative lead of the multi-meter to ground (greenwire) track of edge connection and positive lead of the

multi-meter to valve (red wire) track of edge connection.If no continuity, this indicates a blown valve track. If the valve wire is shorting under the flue box Atwood will warranty the board.

If the E.C.O. terminals are contacting the drawn pan Atwood will warranty the board only if the innertank of the water heater was installed flush on thefloor of the coach.

If the inner tank of the water heater does not restflush against the floor of the coach *Atwood doesnot warranty this installation related failure.

* Installation related failures on circuit boards are theresponsibility of the coach manufacturer.

** Non potted circuit boards can be checked by turning theboard over and visually inspecting each track for a burnmark or break in the track itself. A burn mark or brokentrack indicates the board is blown. Depending on whichtrack is blown determines whether it is covered underAtwoods warranty as stated in section B, C and D.

THERMAL CUT-OFF DEVICECurrent Atwood direct ignition water heaters are equipped

with a thermal cut-off device. This device is located on theincoming power wire and is connected to the thermostat. Thethermal cut-off is designed to permanently break circuit andshut down the water heater before excessive heat can causedamage due to obstructions in the main burner tube or fluetube caused by spiders or mud wasps. These obstructionscan cause the main burner flame to burn outside the mainburner tube. When the flame or the heat from the flamecontacts the thermal cut-off, the circuit will open.

If there is no heat damage to the thermal cut-off, and if it isdetermined defective, Atwood will cover the replacement ofthis device under warranty. We will allow .25 hour at your

Atwood approved warranty rate. If there is heat damage thedevice performed its safety feature and no warranty labor willbe allowed. Any obstructions should be removed, alignmentchecked and gas pressure taken before a new thermal cut-offis installed.

Note: When replacing a thermal cut-off, also examine the grillin the access door while the door is in the closedposition. The wide aluminum band of the grill shouldbe at the bottom. If it is at the top, this condition maytrap exhaust heat and possibly also cause thermal cut-off to trip. To correct, remove the grill from the doorand snap back in place with the wide aluminum band at

the bottom.

THERMOSTATThe thermostat on this water heater is pre-set at 140 F. Thewater heater will cycle off when the water temperaturereaches 140 F. and will generally take 20-25 minutes toreach this temperature. It will cycle back on when the watertemperature cools down to approximately 115 F. In the latterpart of the heating cycle though, it is very common for thepressure-temperature relief valve to weep. Refer to the pagecovering weeping relief valves to remedy this situation.

If a customer is dissatisfied with the temperature of the

water, first check the water temperature with a cookingthermometer and verifying that the initial cycle is within thetime noted above. If not, an adjustable thermostat may bepurchased allowing the water temperatures to be adjustedfrom 110 - 150 F. It fits in place of the original thermostat.


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Water Heater Wiring Schematics

Gas SolenoidValves

ECOSwitch

Non-IgnitionLight

Fixed TemperatureControl Therm ostat

RemoteSwitch

12 volt DC

Spark & Sense

Thermal Cut-Off

RED

RED

BLUE

BROWN

GREEN

GREEN

BROWN BROWN

GREEN

( 6 ) ( 4 )

( 3 ) ( 2 )

GREEN

BLUE

(6)(4)(3)(2)

BATTERY

REMOTE

SWITCH

BROWN

Do t t e d l i n e s a r e w i r e d b y c u s t ome r

When servicing controls, label all wires prior to disconnection.

Wiring errors can cause personal injury or property damage.

Verify proper op eration a fter servicing.

CAUTION

Wiring Schematic G 6A-7E, G H6-7E,G C6A-7E, G CH6-7E, G C6AA-7E,

G 6A-8E, G H6-8E, G C6AA-8E,

G CH6AA-8E, G CH6A-9E

Va lve

Re d

Re d

Re d

White

Circuit

Board

Brown

Brown

Blue

Green

Re d

Sparker

Battery

123

456

Wire Connection

Wiring Schematic G 6A-3E,G6A-4E, G H6-3E, G H6-4E,

GC H6-4E, G 6A-6E, GC H6-6E,

GH6-6E Wat er Heate rs

(Front Mount ECO a nd

Thermos tat Models).

EC O TSTAT

Wiring SchematicG 6A-2E, G 6A-3E, G H6-4E,

G H6-3E Wat er Heate rs

(Rea r Mount ECO a nd

Thermos ta t Mode ls).

Va lveWhite

Green

Re d

Brown Blue

Circuit

Board Orange

Sparker

WhiteGround

Battery

WhiteNon-ignition

Light

J unction Bo x on Ba ck of Unit

Wire Connection

REM OTE

SWITCH


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25

GENERAL INFORMATION

QUESTIONS


What causes the pressure-temperature relief valve to weep when unit is in heating cycle?

How can weeping pressure-temperature relief valves be reduced or eliminated?

What are the proper draining procedures to help reduce lime deposits and extend tank life?

Will a ta nk split for a ny other reas on b es ide s freezing?

What functions do the retaining rings se rve when repla cing a n inner tank?

What a re the most c ommon w a ys to w interize a tank?


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PRESSURE-TEMPERATURE RELIEF VALVEWeeping or dripping of a pressure-temperature relief valve while the water heater is running DOES NOT mean it isdefective. This is normal expansion of water as it is heated in the closed water system of a recreation vehicle. TheAtwood water heater tank is designed with an internal air gap at the top of the tank to reduce the possibility of weepingand dripping. In time, the expanding water will absorb this air. To replace the air follow these steps:

Step 1: Turn off water heater

Step 2: Turn off incoming water supply

Step 3: Open the closest hot water faucet in the coach

Step 4: Pull handle of pressure-temperature relief valve straight out and allow water to flow until it stops.

Step 5: Allow pressure-temperature relief valve to snap shut, turn on water supply and close faucet.

WATER HEATER TANK CORROSIONPinhole leaks from galvanic corrosion may cause the water heater tank to fail.

Microscopic particles of metals (like iron and copper) suspended in water, set up a reaction inside the water heater thatis not unlike the principle on which an automotive battery operates. The aluminum tank is the anode and the metals inthe water serve as the cathode. Consequently, the aluminum gradually sacrifices itself and aluminum particles are carriedaway with the water flow.

A white scaly material (aluminum oxide) often is formed around the points where the heaviest action is taking place andheat accelerates the process. Severity of the problem varies considerably in different locales depending on the metal andmineral content of the water. White deposits inside the water heater tank are usually from water impurities that havesettled out.

Periodic flushing of the water heater tank under pressure is recommended to slow down this process. For flushing

instructions see your owners manual or contact Atwood for a copy of our recommended procedure.

ATWOOD CLAD TANKThe Atwood water heater tank is constructed of a core of high strength aluminum. The interior of the tank consists of a15% thickness of type 7072 aluminum (pure aluminum and zinc) that is fused to the core during the rolling process.This material protects the tank from the affects of heavy metals and salts found in waters throughout the country. It isanodic to these heavy metals and acts much like an anode in a steel glass lined tank except it will last much longer.There is also no need to replace an anode on a yearly basis.

Flushing the tank on a regular basis has been found to be helpful in insuring the best performance of your water haterand adding to the useful life of the tank. For flushing instructions see your owners manual or contact Atwood for a copyof our recommended procedures.

Air Expansion Pocket

Relief Valve

125/150 psi210

Hot Water Outlet

Cold Water Inlet1/2" N.P.T.Drain Plug


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FLUSHING YOUR WATER HEATER TO REMOVETHE ROTTEN EGG ODOR

1. Turn off your main wa ter supply. Drain you wa ter

hea ter tank. Reinstall drain plug. Remove thepress ure-tempe rature relief va lve. With a funnel

use 4 pa rts w hite vinega r to two pa rts w a ter. (In a

6 ga llon ta nk that w ould b e 4 ga llons vinega r to 2

ga llons wa ter).

2. C ycle the wa ter heate r, letting it run unde r norma l

operation 4-5 times. At no time do you remove the

vinega r from the ta nk Once this has b een

co mpleted , remove the d rain plug a nd d rain the

water heater.

3. After thoroughly draining the tank, to remove the

se diment, flush the w ate r heater.

If you elect to use air press ure, it may be a ppliedeither through the inlet or outlet on the rear of the

tank or applied through the pressure-temperature

relief valve. Remove the pressure-temperature

relief valve and insert your air pressure through

the p res sure-tempera ture relief va lve c oupling . In

either cas e, w ith the drain valve o pen, the a ir

pressure will force the remaining water out of the

unit.

If air pressure is unavailable, your unit can be

flushed with fres h wa ter. Fresh wa ter should b e

pumped into the ta nk either with the o nboa rd

pump or external wa ter pres sure. External

press ure ma y b e hos ed into the unit either

through the inlet or outlet found on the rear of the

ta nk or the pres sure-tempera ture relief va lve

coupling loc ate d on the front o f the unit.

Continue this flushing process for approximately

five minutes allowing ample time for the fresh

wa ter to ag itate the stag nant wa ter on the

bottom of the tank and forcing the deposits

through the d rain op ening.

4. Upon completion of the steps above, replace the

drain plug and the pressure-temperature relief

valve.

5. Refill tank with fres h wa ter that c onta ins no

sulphur.

The Atwo od wa ter heater is d esigned for use in a

Rec rea tion Vehicle. If you use your vehicle freq uently

or for long period s o f time, flushing the w ate r heater

se veral times a yea r will prolong the life of the storag e

tank.

WINTERIZING INSTRUCTIONS

1. Turn off your main water supply, that is, your pump oryour water hook up source.

2. Drain your water heater inner tank. Upon doing so, youwill note that, due to the location of the drain plug,approximately two quarts of water will remain in thebottom of the tank. This water contains most of theharmful corrosive particles. If while draining the unit, younote that it is flowing sporadically or trickling, instead offlowing steadily, we recommend one of two things. Youshould first open your relief valve to allow air into the

tank and secondly, take a small gauge wire or coathanger device and prod through the drain opening toeliminate any obstructions.

3. After thoroughly draining the tank, you should then flushit with air pressure or fresh water. If you elect to use airpressure, it may be applied either through the inlet oroutlet on the rear of the tank. It may also be appliedthrough the relief valve part. In this case, it will benecessary to first remove the relief valve support flange.In either case, with the drain valve open, the air pressurewill force the remaining water, along with the corrosiveparticles, out of the unit. However, if air pressure isunavailable, your unit can be flushed with fresh water.

Fresh water should be pumped into the tank either withthe assistance of the on-board pump or with theassistance of external water either through the inlet oroutlet found on the rear or the relief valve couplinglocated on the front of the unit. Continue this flushingprocess for approximately five minutes allowing ampletime for the fresh water to agitate the stagnant water onthe bottom of the tank and thus forcing the depositsthrough the drain opening.

4. Upon completion of the steps above, replace the drainplug and the pressure-temperature relief valve.

5. After this procedure, there will be approximately two

quarts of water left at the bottom of the inner tank.Should this water freeze it will not cause any splitting ofthe tank.


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Terminology Definition

AGA American Gas Association

Access Door hinged cover on outside of waterheater

By Pass Kit a combination of hoses and valvesthat can aid in the winterization of

the water heaterCGA Canadian Gas Association

Calibration the condition determining whetherthe thermostat is registeringtemperatures properly

Cam-Loc Fastener a door securing device

Circuit Board an electronic panel that controls thespark, solenoid valve and sensesthe main burner flame

Drawn Pan metal pan attached to the waterheater tank and fastened to coach

sidewall to isolate combustion tooutside of coach

DSI direct spark ignition a.k.a.electronic ignition

E.C.O. (energy cut off) high temperature re-set shut offdevice

Electrolysis electro chemical corrosive processthat can cause pinholes in tanks

Fenwal Tester a diagnostic circuit board analyzer

Flame Spreader a round deflective piece found atthe combustion end of main burner.

Flue Box a chamber that separates air intakeand exhaust

Flue Tube combustion and water heatingsurface area on inside of tank

Flying Lead flame sensing wire that issometimes found hard wired tocircuit board

Front of Water Hea ter access door side of water heater

Gas Solenoid Valve a 12 volt DC device that turns on oroff the flow of gas

Immersion Element an AC electrical heating coil that isimmersed directly into water

Inverted Flare type of connection using doubleflare fitting and tube nut

Inner Tank patented, designed vessel for

heating water

Jade Knob Clip a horse shoe retainer clip on mainshaft of J ade Gas thermostat thatallows for proper moving ofON/OFF knob and shaft

Terminology Definition

Main Burner a gas and air mixing tube

Main Burner Air Shutter the slotted sleeve on tube thatallows for gas and air adjustment

Main Burner Orifice a precision drilled fitting thatregulates the BTU's of

combustion

N.P.T. (Nat'l Pipe Thread) a plumbing measurement standard

Pilot Assembly A gas tube, orifice & thermocouple

Pilot Orifice a precision drilled thimble shapedcomponent that meters gas flowto pilot

Pilot Relight Ignition Module 12 volt electronic panel thatprovides spark ignition and flamesense to maintain pilot flame

Pressure-Temperature a pressure and temperature safety

Relief Valve device used on water heatingvessels.

Ring and Gasket retaining fiber & metal rings thatsecure combustion pan to tank

Sight Glass burner flame viewing port onaccess door

Spark Probe Assembly a spark electrode & flame sensing

Thermal Cut-Off heat sensing diode that cutspower to circuit board if a flamebacks out of the burner tube orflue tube normally caused by an

obstruction in these areas

Thermostat (gas) a temperature sensitive device forturning on and off the flow of gas(T-stat)

Thermostat (120 volt AC) a surface mount temperaturesensitive device that turns on/offheating element

Thermostat (12 Volt DC) a surface mount temperaturesensitive device that turns on/offthe voltage to the circuit board

Thermocouple a device, when heated, generatesmillivolts of electricity

UL Underwriters Laboratories

"U" Tube also referred to as a flue tube onsome water heater models

Winterization process of preparing a waterheater for cold winter storage

WATER HEATER TERMINOLOGY


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ATWOOD WATER HEATERLIMITED WARRANTY

Atwoo d Mobile P roducts w arrants to the o riginal owner and s ubject

to the below mentioned conditions, that this product will be free ofdefects in ma terial or workmanship for a pe riod of two years fromthe original da te of purcha se. Atwo od s liab ility hereunder is limited

to the replac ement of the product, repair of the product, orreplac ement of the product with a reconditioned product at thedisc retion of the ma nufac turer. This wa rranty is void if the prod uct

has been da maged by a ccident , unreaso nable use , neglect ,

tampering or other ca uses not a rising from d efects in ma terialwo rkma nship. This wa rran ty extends to the origina l ow ner of the

product only and is subject to the following conditions:

1. For a period o f two yea rs from the da te of purcha se, Atwood w illreplace the complete water heater if the inner tank leaks due tocorrosion. This wa rranty includes reasona ble labor cha rges

required to replace the complete water heater.2. For two years from the da te of purchase, Atwood will repair or

repla ce a ny pa rt defec tive in material or workmans hip. This

wa rranty includes reasona ble lab or charges , required to removeand replac e the pa rt. Service c alls to customers loca tion a re notcons idered pa rt of these c harges a nd a re, therefore, the

responsibility of the owner.3. This wa rran ty does no t cover the follow ing items c lass ified a s

normal maintenanc e:

a . adjustment o f g as pressureb. cleaning or replac ement of burner orifice

c . c leaning or adjustment of burner tubed. cleaning or ad justment of f luee. cleaning or a djustment of pilot a nd thermoco uplef. ad justment of press ure-temperature relief valve

4. In the event of a warranty claim, the owner must contact, inadvance, either a certified Atwood Service Center or theAtwood Service Department. Warranty claim service must be

performed at a certified Atwood Service Center (a list will beprovided at no charge) or as approved by the Consumer ServiceDepartment, Atwood Mobile Products, 4750 Hiawatha Drive,Rockford, IL 61103-1298 USA. Phone: (815-877-5700).5. Return parts (or wa ter heater) must be s hipped to Atwo od

Prepaid. Credit for shipping costs will be included with the

wa rranty c laim. The defec tive pa rts (or wa ter heater) bec ome theproperty of Atwoo d Mobile P roducts a nd must b e returned to theCons umer Service Department, Atwood Mobile P roducts, 4750

Hia wa tha Drive, Ro ckford, IL 61103-1298 USA.

6. This wa rranty ap plies on ly if the unit is ins ta lled a cc ording to theinstallation instructions provided and complies with local and statecodes.

7. The wa rran ty period o n replac ement pa rts (or wa ter heater) is theunused portion of the original warranty period.

8. Da ma ge o r failure resulting from misus e (including failure to seek

proper repair service), misapplication, alterations, water damage,or freezing are the ow ners respo nsibility.

9. Atwoo d does not as sume responsibility for any loss of use of

vehicle, loss of time, inconvenience, expense for gasoline,telephone, travel, lodg ing, loss or da mag e to p ersonal propertyor revenues. S ome s tates do not a llow the exclusion o r limitation

of incidental or conseq uential da mag es, s o the a bove limitationsor exclusions may not a pply to you.

10. Any implied wa rranties a re limited to tw o (2) years. So me s tates

do not allow limitations on how long an implied warranty lasts, sothe a bove limitation ma y not a pply to you. This w arranty g ives

you specific legal rights and you may also have other rights whichvary from sta te to s tate.

11. Replac ement parts (components or ta nks) purcha sed outside ofthe original wa ter heater wa rra nty ca rry a 90 da y wa rra nty. This

includes the part at no charge and reasonable labor charges torepla ce it.

This Atwo od hea ter is des igned for use in recreational vehicles for the

purpose of hea ting wa ter as stated in the data plate a ttached to thewa ter heater. Any other use, unless authorized in writing b y the AtwoodEngineering Depa rtment, voids this wa rranty.

Warranty ProceduresAtwood water heater, furnace, range, hardware or detectorwarranties can be submitted in one of two ways.

If you are already set up with an owner care program with anOEM, you should submit the faulty part and claim throughtheir system.

To submit a claim directly through Atwood the followinginformation is required:

1. Owners Name and Address.

2. Date of Purchase - obtain from copy of original bill of sale.

3. Model and Serial Number - The model and serial number,which is located on every water heater, furnace and rangeis required on all Atwood appliance claims.

4. Manufacturer, Model, Year and VIN # of RV.

5. Work Performed - Describe in detail findings of existingproblem and corrective measure taken.

6. Return Parts - A MUST RETURN parts list is attached.Failure to return parts listed will result in denial of your

warranty claim.7. Return Good Number - a Return Goods Number (RGN)

must accompany all returned parts. This number may beobtained by calling the Atwood Mobile Products ServiceDepartment at 1-800-825-4328. The RGN must be clearlymarked on the outside of each carton. Failure to do so willresult in your shipment being refused at our receivingdepartment.

8. Return Freight - Atwood does not accept C.O.D.shipments. Freight to return parts to Atwood should beindicated on your claim or repair order and you will bereimbursed.

9. Travel Time - Because our warranty is based on thecustomers ability to present the unit for service, and in anattempt to maintain our low cost products, reimbursementfor mileage, service calls and travel time WILL NOT BEALLOWED.

10. Payment for Warranty Service - All parts are replaced atno charge, freight prepaid upon our inspection. Labor, onnet 30 accounts is paid by credit memo within 30 days ofreceipt of parts.

11. Flat Rate Schedule - A reasonable flat rate schedule forwarranty repairs has been set for each Atwood productand/or parts. Should unusual circumstances take you

beyond the standard time allowance, you must have priorapproval by contacting the Atwood Mobile ProductsService Department at 1-800-825-4328, and press option5 after the recording.


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Return Goods PolicyEffective August 7, 1995, all Atwood defective returns will no longerbe repaired at the warehouses and returned to customers. Defectivereturns will be shipped back to the respective manufacturing facilityfor problem cause analysis within 30 days of sales. Full credit will beissued if the cause analysis determines Atwood is responsible. If thecause analysis determines the customer is responsible, partial or nocredit will be issued.

Warranty Returns - the warranty policy, must return policy andapproved labor rates provide the framework for warranty returns byproduct line.

Non-Defective Returns - A restocking fee of 20% will be chargedfor handling of overstock returns or standard stock items orderedincorrectly by the customer providing the product is received inresalable condition. Product that has been specifically designed ata customers request is non-returnable. Obsolete or out datedproduct will not be accepted for credit.

Shipping Dam age - Once the product has been accepted at its finaldestination it is the customers responsibility to file a damage claimwith the carrier.

Follow Warranty Procedures for Atwood returns.

Return PartsWhen returning parts, there are three divisions responsible forspecific product and their claims. Prior to returning parts, a ReturnGoods Number (RGN) must be obtained by calling the AtwoodMobile Product Service Department at 800-825-4328.

Shipping - Reasonable shipping charges are reimbursed ondefective and warranty parts if the analysis determines Atwood isresponsible for the disposition. All products not shipped via Atwoodtrucks should be shipped prepaid via UPS ground unless negotiatedat the time the RGN is given. No collect shipments will be accepted.

Packaging -The RGN must be identified on each container & allpacking information. Product returned must be properly packagedto prevent shipping damage. Full credit will not be issued onproduct sent back on an open skid or improperly packaged.Additional product boxes are available upon request.

Submit claims to the correct division. Failure to do so makes claimprocessing a more difficult and lengthy process delaying payment of yourclaims. Together we can maintain a speedy and efficient warranty program.

WATER HEATERS//HARDWARE (jacks, couplers, 5th wheel & braking systems)

Atwood Mobile Products4750 Hiawatha DriveRockford, IL 60013

Must Return Parts ListUnder Atwoods Warranty Administration Program we require,with the return of warranty claims, the specific parts noted below.Failure to accompany your claims with these parts will result inthe non-shipment of a replacement part, or the non-processingof the appropriate credit until such time as the part is received byAtwood.

Before returning the part, a RGN (Re turn Goods Number) must beobtained. This number can be acquired for all products exceptseating, by calling the Atwood Mobile Products ServiceDepartment at 1-800-825-4328. To obtain RGNs for seatingcomponents, please call 1-219-522-7891. Without this RGNappearing on the outside of the shipping carton, the shipmentwill be refused at our receiving department.

FURNACE

All parts

HARDWARECouplersJ acksActuatorsMaster cylindersShock absorbersFoundation brakesPower jacksPower jack motorsAll 5th Wheel items

RANGE & OVENSRegulatorsOven thermostatsSafety pilot valvesBurner valvesManifoldsTop pilot valves12v ignition moduleBurners w/ignitionelectrodeComplete ranges (BY

APPROVAL ONLY)

SEATING COMPONENTS

All parts

WATER HEATERComplete water heatersInner tanksGas thermostat valvesCircuit boardsGas solenoid valvesElectric thermostatsHeating elementsPilot assemblies

Spark probe assembliesE.C.O. & T-stat kitsThermal cut-offsPressure-TemperatureRelief

Valves

FOR EFFICIENT PROCESSING OF CLAIM1. Call for a RGN number.2. Fill Warranty Service Report form out completely.3. Using tape or a tag mark the returning part with the

RGN #.4. Package part including the Warranty Service Report in

the box.5. On the outside of the package clearly mark the RGN

number.

6. Return part to the correct Division of Atwood MobileProducts.

FURNACE/LP DETECTORS

Atwood Mobile ProductsSalt Lake City Operations1874 South Pioneer RoadSalt Lake City, UT 84104

CO DETECTOR

KIDDE Safety (1-800-880-6788)1394 South Third StreetMebane, NC 27302

RANGE/COOK TOPS/DROP- INS/SOL-A-VENTSAtwood Mobile ProductsWedgewood Operations6320 Kelly Willis RoadGreenbrier, TN 37073


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J une 17, 2003

Flat RateSchedule

Water Heaters

TIME ALLOWANCE SCHEDULE in hours

Replacement of: Standard Pilot Electronic IgnitionModel Model

Access Door........................................................................................................ .30 .......................................................................................... .30 ......................................................

Circuit Board .................................................................................................... N/A .......................................................................................... .50 ......................................................

Co mplete Wa ter Hea ter ........................................................ 1.50 ...................................................................................... 1.75 * ..................................................

Dra in Va lve or P lug ................................................................................ .30 .......................................................................................... .30 * ..................................................

Elec tric On-Off S w itch..................................................................

.50..........................................................................................

.50 *..................................................

Heating Element .................................................................................... 1.00 ...................................................................................... 1.00 * ..................................................

Inne r Ta nk ............................................................................................................ 2.00 ...................................................................................... 2.30 ......................................................

Main Burner.......................................................................................................... .50 .......................................................................................... .50 ....................................................

On-Off Light Wa ll Sw itc h ...................................................... N/A .......................................................................................... .75 ......................................................

Pilot Assembly ............................................................................................ .50 ........................................................................................ N/A ......................................................

P ilot Ignitor Mod ule ............................................................................ .50 ........................................................................................ N/A ......................................................

P ress ure-Temp. Relief Va lve ............................................ .50 .......................................................................................... .50 * ..................................................

Relay .......................................................................................................................................................................................................................................... .50 * ..................................................

S oleno id Va lve .............................................................................................. N/A .......................................................................................... .50 ......................................................

Spark &Probe Assembly ...................................................... N/A .......................................................................................... .50 ......................................................

Therma l Cut Off ........................................................................................ N/A .......................................................................................... .30 ......................................................

Thermos ta t &E.C.O. ...................................................................... N/A .......................................................................................... .50 * ..................................................

Thermo sta t-electric .............................................................................. .50 .......................................................................................... .50 ......................................................

Thermos ta t-ga s ...................................................................................... 1.00 ........................................................................................ N/A ......................................................

* ind ica tes time a llow ed for Elec tric/Marine units

Note: All fla t rates include diag nos tic time a nd w hen a pplica ble,gas leak test.


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6 &10 gal.

Documents

Atwood Water Heater Service