153B0801

Installation, Operation andMaintenance Manual

O4MD Oil Fired Downflow /Horizontal Warm Air Furnace

ALL INSTALLATIONS MUST MEET ALLLOCAL, PROVINCIAL/STATE, AND

FEDERAL CODES WHICH MAYDIFFER FROM THIS MANUAL

Read this complete manual before beginninginstallation. These instructions must be keptwith the furnace for future reference.

FOR YOUR SAFETY:Do not store or use gasoline or other flammable liquids or

vapors in the vicinity of this, or any other appliance.

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Table of Contents

1. Introduction..........................................................................................................................................................42. Heat Loss..............................................................................................................................................................43. Location of Unit ...................................................................................................................................................44. Air Conditioning Applications ............................................................................................................................65. Combustion Air....................................................................................................................................................66. Chimney Venting .................................................................................................................................................77. Barometric Damper Control ...............................................................................................................................78. Fan and Limit Control .........................................................................................................................................79. Electrical Connections........................................................................................................................................810. Humidifier ...........................................................................................................................................................811. Oil Piping Installation........................................................................................................................................812. Oil Filter ..............................................................................................................................................................913. Oil Burner Nozzles.............................................................................................................................................914. Combustion Chamber ........................................................................................................................................915. Burner Electrodes............................................................................................................................................1016. Oil Burner Primary Control .............................................................................................................................1017. Oil Burner Set-Up ............................................................................................................................................1018. Circulating Air Blower .....................................................................................................................................1119. Initial Start Up ..................................................................................................................................................1220. Sequence of Operation ...................................................................................................................................1321. Final Check Out ...............................................................................................................................................1322. Operating Instructions ....................................................................................................................................1323. Maintenance and Service................................................................................................................................13Wiring Diagram: O4MD-091A-12-F Series Oil Furnace ......................................................................................21Wiring Diagram: O4MD-140A-16-F Series Oil Furnace ......................................................................................22Wiring Diagram: Continuous Low Speed Fan Operation Modification (Typical). Error! Bookmark not defined.Wiring Diagram: Alternate Thermostat Wiring Methods ...................................................................................24Troubleshooting .....................................................................................................................................................25Homeowner’s reference guide ..............................................................................................................................29Memo to Installer ....................................................................................................................................................29

153B08014

1. INTRODUCTION

Please read these instructions completely and carefullybefore installing and operating the furnace.

The furnace must be installed and set up by a qualifiedcontractor

MODEL O4MD-091A-12-F

Model O4MD-091A-12-F is an oil fired forced air multi-positional furnace, with a nominal output capacity rangeof 60,000 BTU/Hr. to 90,000 BTU/Hr. The O4MD-091A-12-F furnace may be installed in the down-flow position,as well as both horizontal positions.

MODEL O4MD-140A-16-F

Model O4MD-140A-16-F is an oil fired forced air multi-positional furnace, with a nominal output capacity rangeof 91,000 BTU/Hr. to 128,000 BTU/Hr. The O4MD-140A-16-F furnace may be installed in the down-flow position,as well as both horizontal positions.

The O4MD-091A-12-F model is CSA listed, (NRTL/C) foruse with No. 1 (Stove) and No. 2 (Furnace) Oil. Pleaserefer to the tables in Appendix A for performance anddimensional data.

The Model O4MD-140A-16-F furnace is listed with theCanadian Standards Association, (CSA), and the EnergyTesting Laboratory of Maine, (ETLM), for use with No. 1(Stove) and No. 2 (Furnace) Oil. Please refer to thetables in the appendix for performance and dimensionaldata.

DO NOT USE GASOLINE, CRANK CASEOIL, OR ANY OIL CONTAINING GASOLINE.

The installation of the furnace and related equipmentshall be installed in accordance with the regulations ofNFPA No. 31, Installation of Oil Burning Equipment, aswell as in accordance with local codes.

In Canada, the installation of the furnace and relatedequipment shall be installed in accordance with theregulations of CAN/CSA-B139, Installation Code For OilBurning Equipment, as well as in accordance with localcodes.

When installation or application questions arise,regulations prescribed in the National Codes and LocalRegulations take precedence over the generalinstructions provided with this installation manual. Whenin doubt, please consult your local authorities.

All models are shipped assembled and pre-wired. Thefurnace should be carefully inspected for damage whenbeing unpacked.

2. HEAT LOSS

The maximum hourly heat loss for each heated spaceshall be calculated in accordance with the proceduresdescribed in Manual J. titled, "Load Calculation"published by the Air Conditioning Contractors of America,or method suitable for local conditions or prescribed bylocal codes. The calculation results obtained should be insubstantial agreement with, and not less than thoseobtained using the procedure described in Manual J.

In Canada, the maximum hourly heat loss for eachheated space shall be calculated in accordance with theprocedures described in the manuals of the Heating,Refrigeration and Air Conditioning Institute of Canada(HRAI), or by method suitable for local conditions.

3. LOCATION OF UNITThe furnace should be located such that the flueconnection to the chimney is short, direct and consists ofas few elbows as possible. When possible, the unitshould be centralized with respect to the supply andreturn air ductwork. A central location minimizes the trunkduct sizing. All models may be installed on combustiblefloors.

Minimum installation clearances are listed in Table 2.

Sub-bases, for downflow installations are available for theO4MD-091A-12-F and O4MD-140A-16-F series furnaces:

O4MD-091A-12-F: Order Part No. 29018.

O4MD-140A-16-F: Order Part No. 006000073.

IMPORTANT:SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE

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Table 2: Clearances

Model: O4MD-091A-12-FClearance to Combustibles

LocationDownflow Horizontal

Top 0 in. 6 in.Bottom 0 in. * 1 in.S/A Plenum 1 in. 1 in.Rear 1 in. 1 in.Sides 1 in. 1 in.Front 6 in. *** 24 in.Flue Pipe 18 in. ** 18 in. **Enclosure Closet - - -

Model: O4MD-140A-16-FClearance to Combustibles

LocationDownflow Horizontal

Top 0” 3 in.Bottom 1 in. * 1 in.S/A Plenum 1 in. 3 in.Rear 1 in. 1 in.Sides 1 in. 0 in.Front 16 in. *** 24 in.Flue Pipe 9 in. 9 in.Enclosure Closet AlcoveHorizontal Ductwithin 6’ of unit 1 in. 1 in.

* Use sub-base.

** In Canada - 9 inches.

*** The above recommended installation clearances donot take into consideration the clearances necessary toreplace the air filter or perform other routinemaintenance. 24 inches minimum recommended forservicing.

DOWNFLOW INSTALLATION

The furnace has been assembled for installation in thedown-flow position. If the furnace is to be installed in thedown-flow position on a combustible floor, use theappropriate sub-base.

Maintain all other clearances to combustibles as outlinedin Table 1. Suggestion; as a measure to prevent fuel oilfrom accumulating in locations other than the fire pot, ascould be the case in the event of nozzle drip, install thefurnace with an approximate 2 degree slope from the oilburner casing towards the fire pot. Use shims made ofnoncombustible material.

HORIZONTAL INSTALLATIONAlthough the furnace is assembled and shipped ready forinstallation in the down-flow position, the furnace may beinstalled in either of the horizontal positions; warm airdischarging left or warm air discharging right by followingthese steps:

O4MD-091A-12-F Model:1. Rotate the furnace 90° to the desired position.2. Remove the three nut and washer sets fastening the

oil burner assembly to the furnace. Rotate the oilburner assembly to be in the upright position.(Ignition transformer and primary control relay controlshould be on top).

3. Re-align the oil burner assembly to the combustionchamber (fire-pot), then secure into place with thethree nut and washer sets.

4. Ensure that the limit control is in the upper position.See Fig. 6, page 16.

TABLE 1.: GENERAL SPECIFICATIONSBECKETT AF BURNER

FURNACEINPUTUSGPH

OUTPUTBTU/HR.

NOZZLE(Delavan) BURNERMODEL

BURNERHEAD

AIR FILTER

0.50 60,000 0.50 / 60°A0.65 78,000 0.65 / 60°A

AF76BO F0O4MD-091A-12-F

0.75 90,000 0.75 / 60°A AF76XN F320 X 20 X 1

0.75 91,000 0.75 / 80°A0.85 101,000 0.85 / 80°A1.00 117,000 1.00 / 60°A

AF76XN F3O4MD-140A-16-F

1.10 128,000 1.10 / 70°A AF76YB F6

20 X 20 X 1

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O4MD-140A-16-F Model:

1. Rotate the furnace 90° to the desired position.

2. Remove the three nut and washer sets fastening theoil burner assembly to the furnace. Rotate the oilburner assembly to be in the upright position.(Ignition transformer and primary control relay controlshould be on top).

3. Re-align the oil burner assembly to the combustionchamber (fire-pot), then secure into place with thethree nut and washer sets.

4. Remove the cover from the flue collar.5. Remove the screws securing the flue collar to the

furnace, then rotate the flue collar 90°, such that theventing attaches to the top.

6. Secure the flue collar to the furnace, then reinstall theflue collar cover.

NON-SUSPENDED INSTALLATIONMaintain clearances to combustibles as outlined in Table1. Installation on a combustible floor requires a clearanceof 1 inch. This can be done by using noncombustiblematerials such as one inch thick channel iron or similarmaterial. The furnace must be supported in such a wayas to not allow twisting or sagging of the cabinet.Suggestion; as a measure to prevent fuel oil fromaccumulating in locations other than the fire pot, as couldbe the case in the event of nozzle drip, install the furnacewith an approximate 2 degree slope from the oil burnercasing towards the fire pot. Use shims made ofnoncombustible material.

SUSPENDED INSTALLATIONO4MD-091A-12-F: Maintain clearances to combustiblesas outlined in Table 1. The recommended method tosuspend the furnace is to fabricate a cradle with angleiron, 2” slotted angle, or steel channel and 3/8” threadedrod. The threaded rod should be located external to thefurnace. The furnace must be supported in such a way asto not allow twisting or sagging of the cabinet. Positionthe cradle so as to not interfere with accessing the burnerand blower compartments. Suggestion; as a measure toprevent fuel oil from accumulating in locations other thanthe fire pot, as could be the case in the event of nozzledrip, install the furnace with an approximate 2 degreeslope from the oil burner casing towards the fire pot.

O4MD-140A-16-F: Maintain clearances to combustiblesas outlined in Table 1. Remove the four circular knock-outs on the top panel, and similarly, the four circularknock-outs on the bottom panel. The removed knock-outs allow 3/8 inch treaded road to be inserted throughthe interior of the furnace. Use care when inserting rods,since the foil backed insulation can be easily ripped andtorn away from the panel surfaces. Secure the furnacewith 2 inch minimum slotted angle or equivalent, as

shown in Figure 4, page 15. The furnace must besupported in such a way as to not allow twisting orsagging of the cabinet. Suggestion; as a measure toprevent fuel oil from accumulating in locations other thanthe fire pot, as could be the case in the event of nozzledrip, install the furnace with an approximate 2 degreeslope from the oil burner casing towards the fire pot.

4. AIR CONDITIONING APPLICATIONS

If the furnace is used in conjunction with air conditioning,the furnace shall be installed in parallel with or upstreamfrom the evaporator coil to avoid condensation in the heatexchanger. In a parallel installation, the dampers or aircontrolling means must prevent chilled air from enteringthe furnace. If the dampers are manually operated, theremust be a means of control to prevent the operation ofeither system unless the dampers are in the full heat orfull cool position. The air heated by the furnace shall notpass through a refrigeration unit unless the unit isspecifically approved for such service.

IMPORTANT: DO NOT INSTALL AN AIRCONDITIONING EVAPORATOR COIL IN THE RETURNAIR PLENUM.

The blower speed must be checked and adjusted tocompensate for the pressure drop caused by theevaporator coil. Refer to Appendix B for recommendedwiring and electrical connections of the air conditioningcontrols.

5. COMBUSTION AIRIf the furnace is installed in a closet or utility room, twoopenings must be provided connecting to a well-ventilated space (full basement, living room or other roomopening thereto, but not a bedroom or bathroom). Oneopening shall be located above the level of the upper ventopening and one opening below the combustion air inletopening in the front of the furnace. Each opening shallhave a minimum free area of 1½ square inches per 1,000Btu/h of total input rating of all appliances installed in theroom.For furnaces located in buildings of unusually tightconstruction, such as those with high quality weatherstripping, caulking, windows and doors, or storm sashedwindows, or where basement windows are well sealed, apermanent opening communicating with a well ventilatedattic or with the outdoors shall be provided, using a duct ifnecessary. The duct opening shall have a free area of 1½square inches per 1,000 Btu/h of total input rating of allappliances to be installed. When a furnace is installed ina full basement, infiltration is normally adequate toprovide air for combustion and draft operation. Furnacerooms under 700 ft³ (65m³) should automatically betreated as confined space.

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The Model CAS-2B-90E Furnace Boot manufactured byField Controls, Inc. may be used with the furnace toobtain combustion air directly from outdoors. Use of thisdevice does not alter the need for ventilation air;however, it does provide a good direct source ofcombustion air and is connected directly to the oil burner.

6. CHIMNEY VENTINGThe flue pipe should be as short as possible withhorizontal pipes sloping upward toward the chimney at arate of one-quarter inch to the foot. The flue pipe shouldnot be smaller in cross sectional area than the flue collaron the furnace. The flue pipe should connect to thechimney such that the flue pipe extends into, andterminates flush with the inside surface of the chimneyliner. Seal the joint between the pipe and the lining. Thechimney outlet should be at least two feet above thehighest point of a peaked roof. All unused chimneyopenings should be closed. Chimneys must conform tolocal, provincial or state codes, or in the absence of localregulations, to the requirements of the National BuildingCode.NOTE: THE FURNACE IS APPROVED FOR USE WITH

L-VENT.

THE FURNACE MUST BE CONNECTED TO A FLUEHAVING SUFFICIENT DRAFT AT ALL TIMES TOENSURE SAFE AND PROPER OPERATION OF THEAPPLIANCE.

The flue pipe must not pass through any floor or ceiling,but may pass through a wall where suitable fire protectionprovisions have been installed. Refer to the latest editionof NFPA 31 for regulations governing the installation of oilburning equipment. In Canada, refer to the latest editionof CAN/CSA B-139 for rules governing the installation ofoil burning equipment.

7. BAROMETRIC DAMPER CONTROLThis device is used in conjunction with conventionalchimney venting. This control (or draft regulator)automatically maintains a constant negative pressure inthe furnace to obtain maximum efficiency. It ensures thatproper pressures are not exceeded. If the chimney doesnot develop sufficient draft, the draft control cannotfunction properly. The draft regulator, must be installedwithin the same room or enclosure as the furnace, andshould not interfere with the combustion air supply to theburner. The control should normally be located aminimum of 3 pipe diameters from the furnace breechingand installed in accordance to the instructions suppliedwith the regulator. The flue outlet pressure (measuredbetween the furnace and draft regulator) should be set to- 0.02 in. w.c.

8. FAN AND LIMIT CONTROLThe L4064W fan / limit control is a thermally activatedcontrol. There are two active components to the control.The “fan on” function is actuated by a heater wrappedbimetallic lever. The internal heater coil is activatedwhenever the oil burner is operating, resulting in the startup of the blower motor within 30 seconds of the ignitioncycle. This is a non-adjustable setting. The secondcomponent is a helical bi-metal sensing elementenclosed in a metal guard. This controls the “fan off”function and high limit cut off function. This controlprovides a delay between the burner ignition and blowerstart-up to eliminate excessive flow of cold air when theblower activates. Blower shutdown is also delayed toremove any residual heat from the heat exchanger andimprove the annual efficiency of the furnace. “Fan off”settings of 90º F to 100º F (32º C to 37ºC) will usually besatisfactory. In a normal cycle, the “fan on” adjustmenthas little if any effect on the L4064W model control. If theblower starts for brief periods after a burner cycle, thecondition can usually be eliminated by increasing thedifferential between the “fan on” and “fan off” settings.

If after 1 minute, the blower has not come on, inspectionand / or repair of the fan / limit control wiring, orreplacement of the fan / limit control may be necessary.

The limit switch performs a safety function and breakspower to the oil burner primary control, which shuts offthe burner if the furnace over-heats. The limit control isthermally operated and automatically resets. The limitcontrol is factory installed, pre-set and is not adjustable.Limit setting for O4MD-091A-12-F: 250°F. Limit Settingfor O4MD-140A-16-F: 220°F.

FAN/LIMIT CONTROL LOCATION IS CRITICAL INTHE O4MD-091A-12-F HORIZONTAL POSITIONS.TO OPERATE EFFECTIVELY AS A HIGH LIMITCONTROL, THE CONTROL MUST BE INSTALLEDIN THE UPPER POSITION. See Figure 6, page 16.

The limit control and fan control are incorporated in thesame housing and are operated by the same thermalelement. Ensure, prior to installation, that the fan / limitprobe is not in contact with the heat exchanger.

The O4MD-091A-12-F Series furnace is equipped with a160°F auxiliary limit control located in the blowercompartment.

The O4MD-140A-16-F Series furnace is equipped withtwo auxiliary limit controls that are both automatic resettypes. One is a 200°F disc limit located behind thejunction box cover. The other is a 130°F. disc limitlocated on the blower fan housing.

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IMPORTANT: THE O4MD-140A-16-F AUXILLIARYLIMIT (200°F.) POSITIONING IS IMPORTANT. THEDISC SIDE FACES THE HEAT EXCHANGER.

9. ELECTRICAL CONNECTIONSThe O4MD-091A-12-F furnace is listed by the CanadianStandards Association under the NRTL (North American)Standard.

The O4MD-140A-16-F furnace is listed by the CanadianStandards Association (CSA) and by the Energy TestingLaboratory of Maine (ETLM).

Both models are factory wired and require minimal fieldwiring. In the United States, the wiring must be inaccordance with the National Fire Protection AssociationNFPA-70, National Electrical Code, and with local codesand regulations. In Canada, all field wiring shouldconform to CAN/CSA C22.1 Canadian Electrical Code,Part 1, and by local codes, where they prevail.

The furnace should be wired to a separate and dedicatedcircuit in the main electrical panel; however, accessoryequipment such as electronic air cleaners and humidifiersmay be included on the furnace circuit. Although asuitably located circuit breaker can be used as a serviceswitch, a separate service switch is advisable. Theservice switch is necessary if reaching the circuit breakerinvolves becoming close to the furnace, or if the furnaceis located between the circuit breaker and the means ofentry to the furnace room. The furnace switch (serviceswitch) should be clearly marked, installed in an easilyaccessible area between the furnace and furnace roomentry, and be located in such a manner to reduce thelikelihood that it would be mistaken as a light switch orsimilar device.

The power requirement for all models is: 120 VAC, singlephase, 60 Hz., 12A.

Accessories requiring 120 VAC power sources such aselectronic air cleaners and humidifier transformers maybe powered from the furnace circuit, but should havetheir own controls. Do not use the direct drive motorconnections as a power source, since there is a high riskof damaging the accessories by exposure to high voltagefrom the auto-generating windings of the direct drivemotor.Thermostat wiring connections and air conditioningcontactor low voltage connections are shown in the wiringdiagrams. Some micro-electronic thermostats requireadditional controls and wiring. Refer to the thermostatmanufacturer's instructions.

The thermostat should be located approximately 5 feetabove the floor, on an inside wall where there is goodnatural air circulation, and where the thermostat will beexposed to average room temperatures. Avoid locations

where the thermostat will be exposed to cold drafts, heatfrom nearby lamps and appliances, exposure to sunlight,heat from inside wall warm air stacks, etc.

For thermostats with heat anticipators, the heatanticipator should be adjusted to the amperage draw ofthe heating control circuit as measured between the "R"and "W" terminals of the thermostat. To reduce the riskof damaging the heat anticipator, do not measure thiscurrent with the thermostat connected to the circuit. Todetermine the heating circuit amperage draw:1. Note and disconnect the wires from the “R” and “W”

thermostat terminals.2. Connect an ammeter between the two disconnected

wires from the thermostat.3. Note the amperage reading.4. Re-connect the thermostat wires. If the thermostat is

serving a combination heating and air conditioningsystem, pay particular attention to polarity.

5. When the thermostat is reconnected and re-plumbed, adjust the heat anticipator setting to matchthe observed amperage reading.

10. HUMIDIFIERA humidifier is an optional accessory available throughmost heating supplies outlets. Installation should becarried out in accordance with the humidifiermanufacturer's installation instructions. Water or waterdroplets from the humidifier should not be allowed tocome into contact with the furnace heat exchanger. Donot use direct drive motor connections as a source ofpower for 120 VAC humidifiers and humidifiertransformers.

11. OIL PIPING INSTALLATIONThe entire fuel system should be installed in accordancewith the requirement of NFPA No. 31 and local codes andregulations.

In Canada, the entire fuel system should be installed inaccordance with the requirements of CAN/CSA B-139,and local regulations. Use only approved fuel oil tankspiping, fittings and oil filters.

Ensure that all fittings used in a copper oil line system arehigh quality flare fittings. Do not use compression fittings.

Do not use Teflon tape on any oil line fittings.

Pressurized or gravity feed installations must not exceed10 PSIG on the inlet line or the return line at the pump. Apressure greater than 10 PSIG may cause damage to theshaft seal. A pressure-regulating device approved for usewith oil piping systems should be used if the height of thefuel oil exceeds 11½ feet above the oil burner.

153B08019

The furnace may be installed with a one-pipe system withgravity feed or lift. The maximum allowable lift on a singleline system is 8 feet. Lift should be measured from thebottom (outlet) of the tank, to the inlet of the burner.Sizing a single line system is complex because of thedifficulty estimating the pressure drop through eachfitting, bend and component in the line. In general, keepsingle line systems short as possible. If the furnace is tobe installed in a suspended position, a two-pipe systemmay be the better alternative. 2-stage oil pumps may beused with both single line and two line systems. 2-stagepumps are available from your HVAC wholesaler. Thefollowing chart shows the allowable line lengths(horizontal + vertical) for single and two stage oil pumps.All distances are in feet.

Copper Tubing Oil Line LengthsSingle Stage 2-Stage

Lift �” O.D.Tubing

�” O.D.Tubing

�” O.D.Tubing

�” O.D.Tubing

0 53 100 68 1001 49 100 65 1002 45 100 63 1003 41 100 60 1004 37 100 58 1005 33 100 55 1006 29 100 53 1007 25 99 50 1008 21 83 48 1009 17 68 45 10010 13 52 42 10012 - - - - - - 37 10014 - - - - - - 32 10016 - - - - - - 27 10018 - - - - - - 22 88

In retrofit applications, where an existing oil line system isin place, a vacuum check will help determine whether a2-stage oil pump is necessary. The vacuum in a systemfeaturing a single stage oil pump should not exceed 6”Hg. The vacuum in a system featuring a 2-stage oil pumpshould not exceed 15” Hg. (inches of mercury).

NOTE: Two-pipe oil line systems require the installationof the bypass plug in the oil pump. Consult pumpmanufacturer’s instructions

For additional information, see the installation informationsheet affixed to the oil burner.

12. OIL FILTERAll fuel systems should include an oil filter between thefuel oil storage tank and the oil burner. For best results,install the oil filter as close to the burner as possible.When using an oil burner nozzle smaller than 0.65 U.S.gallons per hour, install an additional 7 to 10 micron filteras close as possible to the oil burner. For further detailsof the oil supply tank and piping requirements, pleaserefer to the instructions and illustrations in the oil burnerand oil pump instructions shipped with the furnace.

13. OIL BURNER NOZZLESThe O4MD-091A-12-F furnace is certified for multiplefiring rates, ranging nominally from 60,000 to 90,000Btu/hr.The O4MD-140A-16-F furnace is certified for multiplefiring rates, ranging nominally from 90,000 to 130,000BTU/hr. By manipulating the oil burner nozzle, flameretention head, and temperature rise, the furnace may befired at an ideal rate for a wide range of structures.

Note: A conversion kit, Part No. 36000069 is available toconvert the O4MD-091A-12-F, 60 – 80 MBH model to theO4MD-091A-12-F, 90 MBH model. The O4MD-091A-12-F 90 MBH kit includes the 0.75 USGPH nozzle, 2¾-inchstatic plate and F3 burner head.

Note: A conversion kit, Part No. 00600050 is available toconvert the O4MD-140A-16-F 90 –120 MBH to anO4MD-140A-16-F 130 MBH. The O4MD-140A-16-F 130MBH kit includes the 1.10 USGPH nozzle and F6 burnerhead.

MODEL NOZZLE HEAD

O4MD-091A-12-F (060) 0.50 / 60°A F0O4MD-091A-12-F (080) 0.65 / 60°A F0O4MD-091A-12-F (090) 0.75 / 60°A F3

O4MD-140A-16-F (090) 0.75 / 80° A F3O4MD-140A-16-F (100) 0.85 / 80° A F3O4MD-140A-16-F (120) 1.00 / 60° A F3O4MD-140A-16-F (130) 1.10 / 70° A F6

14. COMBUSTION CHAMBERThis furnace is equipped with an efficient cerafeltcombustion chamber. It is held in place by a retainingbracket. Check the alignment of the combustion chamberbefore firing. It is possible for the combustion chamber toshift if subjected to rough handling during transit.

The cerafelt combustion chamber is quite soft initially.After firing, it becomes very brittle. Be sure to do all

153B080110

alignment and positioning adjustments before the firstfiring.

BEFORE OPERATING THE FURNACE CHECKBURNER ALIGNMENT WITH COMBUSTIONCHAMBER. THE END CONE OF THE AIR TUBEMUST BE CENTRED TO THE ACCOMODATINGRING PROVIDED IN THE DESIGN OF THECOMBUSTION CHAMBER. ADJUST ASNECESSARY.

The combustion chamber should be inspected fordamage or carbon build up whenever the oil burner isremoved for repairs or routine maintenance.

15. BURNER ELECTRODESCorrect positioning of the electrode tips with respect toeach other, to the fuel oil nozzle, and to the rest of theburners is essential for smooth light ups and properoperation.

The electrode tips should be adjusted to a gap of 5/32”,1/16” ahead of the nozzle, 5/16” above the centerline ofthe nozzle.

NOTE: Older literature specifies 7/16” above centerline;use new specification; 5/16” above centerline.

The “Z” dimension is 1-1/8” (see oil burner instructionsinsert in documents envelope).

The electrode porcelains should be free of cracks, theelectrode tips should be tapered and free of burrs, andthe contact rods must be clean and be in firm contactwith the ignition transformer or igniter contact springs.

16. OIL BURNER PRIMARY CONTROLThe furnace is equipped with a Honeywell R8184Nprimary combustion control, sometimes referred to as theburner relay or burner protector relay. It uses a lightsensing device (cad cell) located in the burner housing, tomonitor and control combustion. Over time, dust orcombustion residuals can build up on the lens of the cadcell impairing its response to the flame. The cad cellshould be checked for cleanliness and proper alignmentif the primary control frequently shuts down combustion.

17. OIL BURNER SET-UPThe burner air supply is adjusted to maintain the fuel toair ratio to obtain ideal combustion conditions. A lack ofair causes "soft" and "sooty" flames, resulting in sootbuild-up throughout the heat exchanger passages.

Excess combustion air causes a bright roaring fire andhigh stack temperatures resulting in poor fuel efficiency.

PREPARATIONS:Drill a ¼” test port in the venting, ideally at least 2 fluepipe diameters away from the furnace breeching, ifventing horizontally from the furnace, or from the fluepipe elbow if venting vertically before reaching thefurnace. (See Figures 1 and 2).

Figure 1: Test port location for smoke test -horizontal.

Courtesy of R. W. Beckett Corporation.

Figure 2: Test port location for smoke test - vertical.

Courtesy of R. W. Beckett Corporation

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Note A: Locate hole at least 6 inches on the furnace sideof the draft control.

Note B: Ideally, hole should be at least 12 inches frombreeching or elbow.

Before starting the burner, check the burner alignmentwith the combustion chamber (fire pot), check that thecorrect nozzle is tightened into place, and that the burnerelectrodes are properly positioned.

PROCEDURE:

Start the burner and allow it to run at least ten minutes.Set the air shutter to give a good flame visually. Thecombustion air supply to the fire is controlled bymanipulating the air shutter on the left side of the burner,and, if necessary, the bulk air band. To adjust, loosen thebolt on the movable shutter. Move the shutter graduallyuntil a good flame (visually) has been achieved. Re-snugthe bolt.

Check the initial draft setting as the furnace warms up.The draft may be measured at the test port.

Check the oil pump pressure, normally, 100 PSIG.

After reaching steady state, take a smoke test. If notindicating a trace, set the combustion air controls toprovide a trace.

Typically, the CO2 reading will range between 11.5% to13.5%.

After the air adjustments have been completed, and theair shutter or air adjustment plate has been secured, takeanother smoke test to ensure that the values have notchanged.

The maximum combustion efficiency based on flue gashigh CO2 content generally lies between a No. 1 and No.2 smoke spot on the Bacharach Scale. This is not theoptimum setting; however, because dust will inevitablybuild up on the air moving components of the oil burnerassembly. This will result in decreased air supply with thepotential result of soot building up in the flue gaspassageways of the heat exchanger. Soot behaves as aninsulator and impairs good heat transfer. Stacktemperature will increase, and the overall efficiency willdecrease. As a means of avoiding this problem, thesmoke should be held at a trace.

SMOKE TEST NOTE:

If oily or yellow smoke spots are found on the smoke testfilter paper, it is usually a sign of unburned fuel. Thisindicates poor combustion. This type of problem may becaused by excess draft, excess air, or contaminated fuel.Do not ignore this indicator.

STACK TEMPERATURE:Stack temperature will vary depending on fuel input,circulating air blower speed, and burner set up, etc. Ingeneral, stack temperature should range between 350°Fto 450°F, but could be as high as 550°F, assuming thatthe combustion air is approximately room temperature(65°F - 70°F). In general, lower stack temperatureindicates greater efficiency; however, excessively lowstack temperature can lead to condensation forming inthe chimney and / or venting. Sulphur and similarcontaminants in the fuel oil will mix with condensation toform acids. Acids and resultant chemical salts will causerapid deterioration of the chimney and ventingcomponents, and may attack the furnace.

If the flue gases are below the range, it may benecessary to slow down the blower fan. If the flue gasesare above the range, the blower fan may requirespeeding up. Stack temperature varies directly with thesystem temperature rise. System temperature rise is thedifference between the furnace outlet temperature andfurnace inlet temperature as measured in the vicinity ofthe connection between the plenum take-offs and thetrunk ducts. Typical temperature rise values rangebetween 65°F and 90°F.

If the venting from the furnace to the chimney is long, orexposed to cold ambient temperatures, consider using L-Vent to reduce stack loss.

18. CIRCULATING AIR BLOWERThe furnace is equipped with direct drive blower system.Direct drive blower speed adjustments are not normallyrequired in properly sized extended plenum ductsystems. The motor RPM and air CFM delivery will varyautomatically to accommodate conditions within the usualrange of external static pressures typical of residentialduct systems. Under-sized duct systems may require ahigher blower speed to obtain a reasonable systemtemperature rise. Some older duct systems were notdesigned to provide static pressure. They typically featurespecial reducing fittings at each branch run and lackblock ends on the trunk ducts. These systems mayrequire modification to provide some resistance to theairflow to prevent over- amping of the direct drive blowermotor. Selecting a lower blower speed may correct thisproblem.

Direct drive blower speeds are adjusted by changing the"hot" wires to the motor winding connections. Pleaserefer to wiring diagrams in Appendix B or the wiringdiagram label affixed to the furnace.

THE NEUTRAL WIRE (normally the white wire) ISNEVER MOVED TO ADJUST THE BLOWER SPEED.

153B080112

It is possible and acceptable to use a single blower speedfor both heating and cooling modes. The simplestmethod to connect the wiring from both modes is to use a"piggy-back connector" accommodating both wires on asingle motor tap. It is also acceptable to connect theselected motor speed with a pigtail joined to both heatingand cooling speed wires with a wire nut. As a safetyprecaution against accidental disconnection of the wiresby vibration, secure the wire nut and wires with a fewwraps of electricians tape.

DO NOT CONNECT POWER LEADS BETWEENMOTOR SPEEDS. THE NEUTRAL WIRE MUSTALWAYS BE CONNECTED TO THE MOTOR'SDESIGNATED NEUTRAL TERMINAL.

If the joining of the blower speed wiring is done in thefurnace junction box or control box, tape off both ends ofthe unused wire.

DISCONNECT THE POWER SUPPLY TO THEFURNACE BEFORE OPENING THE BLOWERACCESS DOOR TO SERVICE THE AIR FILTER, FANAND MOTOR. FAILURE TO SHUT OFF POWERCOULD ALLOW THE BLOWER TO STARTUNEXPECTEDLY, CREATING A RISK OF DEATHOR PERSONAL INJURY.

Do not use the blower speed wires as a source ofpower to accessories as electronic air cleaners andhumidifier transformers. The unused motor tapsauto-generate sufficiently high voltages to damageaccessory equipment.

DO NOT START THE BURNER OR BLOWER FANUNLESS THE BLOWER ACCESS DOOR ISSECURELY IN PLACE.

19. INITIAL START UPOnce the furnace flue pipe, electrical and oil lineconnections have been made, use the followinginstructions to set up the furnace:

1. Shut off the electrical power to the furnace.2. Install an oil pressure gauge to the pressure port on

the oil pump. (Refer to the oil pump specificationsheet included with the burner instructions).

3. Restore electrical power to the furnace.

4. Start the furnace and bleed all air from the fuel oillines.

5. Close the purge valve and fire the unit.6. Follow the procedures outlined in 17. – Oil Burner Set

Up, (page 10).

7. Check the system temperature rise with a pair of ductthermometers. The temperature rise is the differencebetween the return air temperature measured at apoint near the return air inlet, and the supply airtemperature measured near the furnace outlet. Thesystem temperature rise will typically range between65°F and 95°F. If the temperature rise is too high, theairflow must be increased. If the temperature rise istoo low, the fan should be slowed down.

8. Turn off the oil burner. Observing the ductthermometer in the supply air stream, note thetemperature at which the blower fan stops. The fanadjustments are made by manipulating the FAN ONand FAN OFF levers. EXAMPLE: If the "FAN OFF"setting is observed to be 100°F, and the actual "fanoff" temperature as indicated by the ductthermometer is 110°F, the "FAN OFF" setting on thefan / limit control can be reset to 90° (one notchclockwise), to cause an actual fan shutdown at100°F. Normally, the 'FAN ON" setting is set to beapproximately 30° higher than the "FAN OFF" setting.Some downflow applications require a greaterdifference; 40° - 50°F.

9. To check the operation of the limit switch, shut offpower to the furnace. Temporarily remove the neutralwire from the direct drive blower motor. Restore theelectrical power to the furnace and set the thermostatabove room temperature. After three or four minutesof burner operation, the limit control should turn theburner off. Progress towards a high limit shut downcan be monitored by watching the dial on the fan /limit control. When the limit function test is complete,first, shut off electrical power to the furnace, replacethe neutral wire to the blower fan motor, then restorepower. The blower fan will start up immediately.Once the temperature has dropped, the oil burner willresume and continue until the thermostat is satisfied.Restore the thermostat setting to a comfortabletemperature.

10. Set the thermostat heat anticipator to 0.3 A, or followthe procedure outlined in 9. Electrical Connections,(page 8).

NOTE: THE FURNACE SHOULD BE RUN THROUGHAT LEAST THREE FULL CYCLES BEFORELEAVING THE INSTALLATION, TO ENSURETHAT ALL CONTROLS ARE OPERATINGPROPERLY AND AS EXPECTED.

153B080113

20. SEQUENCE OF OPERATION

1. Room temperature drops, the thermostat calls forheat.

2. The oil burner starts, ignition begins.3. The cad cell detects light from combustion,

disconnects the primary control safety circuit,allowing combustion to continue.

4. The bi-metallic element in the fan/limit control startsthe fan within 30 seconds.

5. The furnace continues to operate and will eventuallyreach "steady state", the point at which the systemtemperature stabilizes. (The furnace does notbecome any warmer).

6. Room temperature rises; the thermostat is satisfied,and the thermostat heating contacts open.

7. The oil burner stops.8. The furnace temperature cools causing the fan

control contacts to open; the circulating fan stops.

9. The furnace remains idle until the next call for heat.

21. FINAL CHECK OUTEnsure that all safety devices and electrical componentshave been set for normal operation. Ensure that allelectrical connections are tight and that the wiring issecure.The furnace should be operated for a minimum of 15minutes to reach steady state conditions before finetuning combustion. The warm up time is ideal for testingthe oil pump pressure.Re-sample the flue gas for draft, [Bacharach] smoke,CO2 or O2 content, and temperature. If the results aresatisfactory, make note of them and leave them with thefurnace. They constitute a baseline that may be helpfulfor future diagnostics.

22. OPERATING INSTRUCTIONSBefore Lighting1. Open all supply and return air registers and grilles.2. Open all valves in oil pipes.3. Turn on electric power supply

To Light Unit

1. Set the thermostat above room temperature to callfor heat. The burner starts.

2. After a short period of time, as the furnace warms,the circulating fan starts.

3. Set the thermostat below room temperature. The oilburner stops.

4. The air circulation blower continues to run until thefurnace cools.

To Shut Down Unit

1. Set the thermostat to the lowest possiblesetting.

2. Set the manual switch (if installed) in theElectrical Power Supply Line to "OFF".

NOTE: IF THE FURNACE IS TO BE SHUT DOWN FORAN EXTENDED PERIOD OF TIME, CLOSETHE OIL SUPPLY VALVE TO THE BURNER.

IF THE FURNACE FAILS TO IGNITE, CHECKTHE OIL TANK FUEL GAUGE. IF THE FUELGAUGE SHOWS THAT OIL IS PRESENT,PRESS THE RESET BUTTON ONCE ONLY. IFTHE BURNER FAILS TO IGNITE, CONTACTYOUR SERVICE CONTRACTOR.

ALL FURNACE CONTROLS ARE SENSITIVEAND SHOULD NOT BE SUBJECTED TOTAMPERING. IF PROBLEMS PERSIST, CALLYOUR SERVICE CONTRACTOR.

23. MAINTENANCE AND SERVICEA: Routine Maintenance By Home Owner

Other than remembering to arrange for the annualprofessional servicing of the furnace by the service orinstallation contractor, the most important routine serviceperformed by the homeowner is to maintain the air filteror filters. A dirty filter can cause the furnace to over-heat,fail to maintain indoor temperature during cold weather,increase fuel consumption and cause component failure.The furnace filter(s) should be inspected, cleaned orreplaced monthly. The furnace is factory equipped with asemi-permanent type filter. If the filter is damaged,replace with filters of the same size and type.

During the routine service, inspect the general conditionof the furnace watching for signs of oil leaks in the vicinityof the oil burner, soot forming on any external part of thefurnace, soot forming around the joints in the vent pipe,etc. If any of these conditions are present, please adviceyour service or installation contractor.

153B080114

Annual Service By Contractor

THE COMBUSTION CHAMBER (FIREPOT) ISFRAGILE. USE CARE WHEN INSPECTING ANDCLEANING THIS AREA.

The heat exchanger should be inspected periodically andcleaned if necessary. if cleaning is necessary, SHUTOFF POWER TO THE FURNACE and remove theburner. Using a stiff brush with a wire handle, brush offscale and soot from inside the drum and flue pipe. Toclean the radiator, remove the round covers on the innerfront panel to gain access to the cleaning ports. Whenthis procedure is done for the first time, carefully cut awaythe insulation covering the opening with a sharp knife.Loosen the nuts on the radiator clean-outs. DO NOTREMOVE THE NUTS. Remove the covers carefully toavoid tearing the gaskets. A wire brush can be used toloosen dirt and debris on the inside surfaces of theradiator. Clean out all accumulated dirt, soot and debriswith a wire handled brush and an industrial vacuumcleaner. Before replacing the clean-out covers, inspectthe gaskets. If the gaskets are broken, remove theremnants and replace with new gaskets. Snug thecleanout covers. DO NOT OVER-TORQUE THE CLEAN-OUT NUTS. Replace the inner front panel clean-outcovers.

NOTE: A radiator clean-out assembly inadvertentlydropped into the interior of the furnace can usually beeasily retrieved with a magnet on a wire handle or with amagnet tied to a string.

Both the direct drive blower motor and oil burner motorare factory sealed. They do not require annual lubrication.

Inspect the blower fan. Clean if necessary.

Oil Burner Maintenance: Follow the instructions of the oilburner manufacturer. (See oil burner manufacturer'sinstructions supplied with furnace). It is advisable tochange the oil burner nozzle and oil filter on an annualbasis.

The venting system should be cleaned and inspected forsigns of deterioration. Replace pitted or perforated ventpipe and fittings. The barometric damper should openand close freely.

All electrical connections should be checked to ensuretight connections. Safety controls such as the high limitcontrols should be tested for functionality. The fan controlshould be checked to ensure that the "fan off" functioncontinues to stop the blower fan at temperatures between90°F to 100°F.

DO NOT ATTEMPT TO START THE BURNERWHEN EXCESS OIL HAS ACCUMULATED,WHEN THE FURNACE IS FULL OF VAPOUR,OR WHEN THE COMBUSTION CHAMBER ISVERY HOT. NEVER BURN GARBAGE ORPAPER IN THE FURNACE, AND NEVER LEAVEPAPER OR RAGS AROUND THE UNIT.

153B080115

Figure 3: O4MD-140A-16-F Sub-Base Assembly

Figure 4: Typical O4MD-140A-16-F Horizontal / Suspended Unit

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153B080125

Appendix CTROUBLESHOOTING

Problem Possible Cause Remedy

Thermostat not calling forheat.

Check thermostat and adjust. Also, check thermostatfor accuracy; if it is a mercury switch type, it might be offlevel.

No power to furnace.

Check furnace switch, main electrical panel furnacefuse or circuit breaker. Also look for any other handoperated switch, such as an old poorly located furnaceswitch that was not removed during furnacereplacement.

Thermostat faulty.

Check reset button on protector relay. Removethermostat wires from protector relay terminals T1-T2.Place a jumper across T1-T2. If furnace starts, replacethermostat, thermostat sub-base (if equipped), or both.

Protector relay faulty.

Check reset button on protector relay. Removethermostat wires from protector relay terminals T1-T2.Check for 24v across T1-T2. If no voltage is present,check for 115v to protector relay. If 115v is present,replace protector relay.

Photo Cell wiring shortedor room light leaking intophoto cell compartment

Check cad cell wiring for short circuits. Also, check forroom light leaking into cad cell compartment. Repairlight leak if necessary.

Furnace will not start.

Open safety switch.Check for open limit or auxiliary limit, open door switch(if equipped). Also, check internal wiring connections;loose connectors, etc.

No fuel oil.Check fuel oil supply. Check that all hand operated fueloil valves are in the open position. Fill oil storage tank ifnecessary.

Clogged nozzle. Replace nozzle with high quality replacement. Userating plate or Tables in Appendix A as a guide.Clogged oil filter. Replace oil tank filter or in-line filter if used.

Low oil pump pressure.

Connect pressure gauge to oil pump. Adjust pumppressure, or replace oil pump if necessary. Ensure thaterratic pressure readings are not caused by defectivefuel oil line.

Air getting into fuel oillines, or fuel oil line dirty,clogged, or in somemanner defective.

Check fuel oil lines. Replace any compression fittingsfound with high quality flared fittings. Check for anysigns of oil leaks. Any oil leak is a potential source of airor contaminants.

Furnace will not startwithout first pushingprotector relay resetbutton.(Happens on frequentbasis)

Defective burner motor. Check burner motor. If burner motor is cutting out onover-load, determine why. Replace if necessary.

Furnace starts, butcuts out requiringmanually resettingthe oil protector resetbutton.

Photo Cell (Cad Cell)defective.

If cad cell is dirty, clean it. (Determine why cad cell isgetting dirty). If cad cell is poorly aimed, realign it.NOTE: The cad cell should have a resistance of 100KΩ in absence of light; a maximum of 1500 Ω in thepresence of light. Ensure that room light is not leakinginto the cad cell compartment.

153B080126

Problem Possible Cause Remedy

Faulty L4064W heaterwiring.

Ensure that the wires from the L4064W fan/limit controlare connected to T2 and F2 on the R8184N primarycontrol.

No fuel oil.Check fuel oil supply. Check that all hand operated fueloil valves are in the open position. Fill oil storage tank ifnecessary.

Clogged nozzle. Replace nozzle with high quality replacement. Userating plate or Tables in Appendix A as a guide.Clogged oil filter. Replace oil tank filter or in-line filter if used.

Low oil pump pressure.

Connect pressure gauge to oil pump. Adjust pumppressure, or replace oil pump if necessary. Ensure thaterratic pressure readings are not caused by defectivefuel oil line.

Air getting into fuel oillines, or fuel oil line dirty,clogged, or in somemanner defective.

Check fuel oil lines. Replace any compression fittingsfound with high quality flared fittings. Check for anysigns of oil leaks. Any oil leak is a potential source of airor contaminants.

Defective burner motor. Check burner motor. If burner motor is cutting out onover-load, determine why. Replace if necessary.Water or contaminants inoil.

Drain fuel oil storage tank, replace fuel oil. (Consult withfuel oil supplier).

Frozen oil line. Gently warm oil line. Insulate oil line. (Outdoor pipingsize may require increased diameter).

Furnace starts, butcuts out requiringmanually resettingthe oil protector resetbutton.…continued

Wrong primary control.

Ensure that the primary control (Protector Relay) is anR8184N. Substitutes such as the R8184G do not havesufficient capacity to operate both the safety circuit andfan circuit.

Electrodes out ofadjustment or defective.

Check electrode settings. Check electrodes for dirtbuild-up or cracks in porcelain.

Poor transformer highvoltage connections ordefective transformer.

Check contacts between transformer and electrodes. IfOK, replace transformer.

Fuel oil filter clogged. Replace fuel oil storage tank filter and / or fuel oil in-linefilter.

Defective oil pump. Check burner motor / fuel oil pump coupling. Check oilpump pressure. Replace fuel oil pump if necessary.

Oil burner sputteringat nozzle

Fuel oil line partiallyclogged or contains air.

Bleed air from oil line. If problem persists, replace oilline.

System temperature risetoo high.

System temperature rise should not exceed 85°F.Check for clogged air filters. Check blower fan forexcess dirt build-up or debris. Speed up blower fan ifnecessary.

Excessive fuel oilconsumption.

Blower fan control out ofadjustment, (fan stopstoo soon).

Check fan control settings. The fan control is adjustedwith a duct thermometer in the supply air plenum take-off or first few inches of the supply air trunk duct. The "fan off" setting should be 90° - 100°F. Once set, the"fan on" setting is normally adjusted 25° - 30°F higherthan the "fan off" setting.

153B080127

Problem Possible Cause Remedy

Fuel oil leak. Check fuel oil line for leaks. Repair or replace ifnecessary.

Stack temperature toohigh.

Check stack temperature. Stack temperatures willnormally range from 350° to 450°F. Check draftregulator. Draft should be set to 0.02 in. w.c.

Excessive fuel oilconsumption.…continued

Thermostat improperlyadjusted or in poorlocation.

Check thermostat heat anticipator setting againstmeasured amperage draw. Increase heat anticipatorsetting if necessary. If the thermostat is beinginfluenced by drafts, sunlight, duct work, etc., relocateto more suitable location.

Insufficient combustionair adjustment at oilburner, or improper draftpressure.

Adjust the oil burner combustion air shutter and draftregulator to gain the highest CO2 possible with aBacharach trace smoke.Too much smoke.

Heat exchanger partiallyclogged.

Check for soot build-up in heat exchanger fluepassages, especially in the outer radiator.

Poor alignment betweenoil burner blast tube andfire pot.

Check alignment. blast tube should be centered withfire pot burner opening. Oil burner head should be ¼inch back from the inside surface of the fire pot.

Flame impingementcaused by Incorrectnozzle angle.

Check nozzle size and angle. (See Appendix A). Checkdistance from head to inside surface of the fire pot.

Incorrect electrodesettings. Check the electrode settings and “Z” dimension.

Soot building up onair tube (end coning).

Defective fire-pot Check fire-pot. Repair or replace.Air flow blocked or dirtyair filter. Clean or replace air filter.

Thermostat adjustmentsor location.

Check thermostat heat anticipator setting againstmeasured amperage draw. Increase heat anticipatorsetting if necessary. If the thermostat is beinginfluenced by drafts, sunlight, duct work, etc., relocateto more suitable location.

Insufficient air flow.

Check all dampers. Open closed dampers includingregisters in unused rooms. Check system temperaturerise. If temperature rise is too high, speed up blowerfan.

Defective high limitcontrol.

Test high limit function of all limit switches. Use a ductthermometer to assess accuracy of limit control. Checkfor obstructions to airflow around limit switch bi-metalelements. Replace control if necessary.

Under-sized nozzle. Check nozzle. If problem is not caused by air flowproblems, use larger nozzle, if permitted by rating plate.Blower fan motorstopping intermittently onoverload.

Check blower fan motor amperage draw. Check motorventilation ports, clean if necessary. Replace motor ifnecessary.

Furnace will notwarm home todesired temperature

Burner motor stoppingintermittently on overload. Check burner motor. Replace if necessary.

Home does not heatevenly

Improper distribution ofheat.

This is not likely to be a furnace problem. Balance ductsystem.

153B080128

Problem Possible Cause RemedyAirflow blocked or dirty airfilter. Clean or replace air filter.

Supply airtemperature too hot.

Insufficient airflow.

Check all dampers. Open closed dampers includingregisters in unused rooms. Check system temperaturerise. If temperature rise is too high, speed up blowerfan.

Excess airflow. Check system temperature rise. Slow down blower fanif necessary.Supply airtemperature too cool.

Excessive duct losses. Check supply air ductwork. Seal leaky joints andseams. Insulate ductwork if necessary.

Fan control "fan on"setting too low.

No adjustments available for L4064W fan / limitcontrol). Register air deflectors may help.

Supply airtemperature too coolduring first momentsof furnace cycle. Excessive duct losses. Check supply air ductwork. Seal leaky joints andseams. Insulate ductwork if necessary.

NOTES

153B0801

HOMEOWNER’S REFERENCE GUIDE

Model No. If different from Installation Contractor:

Serial No. Service Tech

Date Installed Telephone No.

Installer After Hours No.

Contact

Address Fuel Supplier

Contact

Telephone No.

Postal Code After Hours No.

Telephone No.

After Hours No.

MEMO TO INSTALLER

Please ensure that the homeowner is informedand understands:

1. where the circuit breaker or fuse is located inthe main electrical panel.

2. where the furnace switch is located, and theswitch "on" and "off" positions if not obvious.

3. where the oil shut-off valve from the oilstorage tank is located.

4. how to operate the thermostat, and otherrelated accessories.

5. how to operate the manual reset button on theprimary control, and especially when not topush the reset button.

6. how and where to visually inspect the ventingsystem for leaks or other problems.

7. how to inspect, clean and replace the air filter,and other homeowner maintenanceprocedures.

8. who to call for emergency service and routineannual service.

9. the terms and conditions of themanufacturer's warranty and the contractor'swarranty.

153B0801

153B0801

St. Louis MO 153B0801