2016 Lennox Industries Inc. iHarmony Dallas, Texas, USA · 2017. 10. 17. · HP heat demand with the demanded rate equal to the current rate 25%. (i.e. the switch opens during a 90%

�2016 Lennox Industries Inc.Dallas, Texas, USA

CONTROLSKITS AND ACCESSORIES

507132-02 9/2016Supersedes11/2015

iHarmony® Zoning System

Installation Instructions for the iHarmony® Zoning System (10C16)

WARNINGImproper installation, adjustment, alteration, service ormaintenance can cause property damage, personal injuryor loss of life.

Installation and service must be performed by a licensedprofessional HVAC installer (or equivalent) or serviceagency.

TABLE OF CONTENTS

Shipping and Packaging 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Required Items Sold Separately 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Zoning Components 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hardware Installation and Setup 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iComfort® Wi-Fi Thermostat — Installer Zoning Control Settings 9. . . .

iComfort Wi-Fi Thermostat — User Zoning Control User Settings 11. . . .

iComfort® S30 Smart Thermostat — Zoning Control Settings 13. . . . . . .

iComfort® S30 Smart Thermostat — Smart Hub Zoning Control Settings 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iComfort S30 Smart Thermostat — Zoning Control User Settings 14. . . .

Minimum CFM for iHarmony® Zoning System with Variable Speed Blower Motors 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Zoning Sequence of Operations 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Humidity Control 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Zoning Parameters 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Soft Disable and Zoning Alert Codes 17. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Shipping and Packaging

Kit (10C16) consists of the following:

1 - Damper control module assembly

1 - Discharge air temperature sensor (88K3801)

1 - Screwdriver for use with In-Zone thermostats

4 - Screws (#6-20 x ⅜, Philips pan head type 25)

1 - Freeze-stat jumper (pre-installed on damper control)

1 - Warranty sheet

General

The damper control module is compatible with both theiComfort Wi-Fi® thermostat (10F81) or (88W58) withsoftware version 2.13 or higher or S30 thermostat (12U67)and:

� iComfort® variable speed or variable capacity(modulating) indoor and two-stage or variable capacity(modulating) outdoor units.

� iComfort® variable speed indoor unit andcommunicating or non-communicating (conventional)

single-stage outdoor unit (two zones maximumsupported).

� iComfort® variable speed indoor unit andcommunicating or non-communicating (conventional)two-stage outdoor unit (four zones maximumsupported).

NOTE: See table 8 for a list of Lennox variable speed indoor

units.

Required Items Sold Separately

The following items are also required for the iHarmony®

Zone System to operate:

1. In-zone thermostats (catalog number 10C17) — arerequired for zones 2 through 4. Zone 1 is controlled bythe iComfort® series thermostat.

2. Zone damper transformer (see table 1) for correct size.

3. Zone dampers — recommended zone dampers arespring-open and power-close but you may also usepower-open and spring-close, or power-open andpower-close. Modulating dampers are not supported.

4. Optional freezestat (see table 3 on page 5 for availablefreezestats based on tubing sizes).

5. Fasteners to install the damper control module.

6. Heat Pump Applications Only: HFC-410A pressureswitch (27W13) and valve depressor tee (87071) arerequired.

IMPORTANTHeat Pump Systems Only: Do not use jumper for pressureswitch terminals at the damper control module. Systemwill not function properly without pressure switch installed.

Zone Damper Transformer

The zone dampers are powered by a field−provided 24VACtransformer. Zone dampers require 6 to 12VA eachdepending on zone damper used. The zone dampertransformer must have an adequate VA rating to serve allcomponents (see recommendations in table 1).

The damper control module and three inzone thermostatsrequire a total of 6VA to operate.

Table 1. Zone Damper Transformer Selection Chart

CatalogNumber

Size Description VA LOAD =

10P17 40VA

120/208/240VAC,24VAC

Damper VA x number ofdampers + 6VA (dampercontrol module + 3 inzonethermostats) = dampertransformer VA requirement.

10P87 50VA

12P61 75VA

83P74 _ Electrical Box (4‐in. square)

507132-02

Zoning Components

TRANSFORMER PHASING

The indoor unit and zone damper transformers must be inphase since both are connected to the damper control module.Follow the instructions below for phasing both transformers.

1. Connect the damper control module INDOOR R and C to the indoor unit R and C.

2. Connect the external 24VAC transformer to the damper control module DMPR XFMR R and C terminals.

3. Measure voltage between the damper control module INDOOR R and DPMR XFMR R terminals.

> Inphase voltage will be less than 10VAC.

> Outofphase voltage will be greater than 40VAC. If voltage is greater than 40VAC, swap external 24VACtransformer (DMPR XFMR R and C) wires.

Ci−i+RCi−i+RINDOOR

DMPRXFMR

SYS

XFMR

iComfort�-enabledFurnace or Air

Handler

Ci−i+R

External 24VACTransformer

R

Damper ControlModule

Volt Meter

TSTAT

C

R CDMPRXFMR

Figure 1. Confirming Correct Transformer Phasing (Polarity)

DAMPERS

See table 1 to determine the minimum damper transformer VA requirements based on the number of zones being installed.If extended zone dampers are used then see figure 2 for damper, transformer and zone relay wiring requirements.

Refer to the iHarmony® zoning system Product Specification for ordering dampers and other various components.

Once the damper control module has been installed and the system energized, the damper control module will automatically populate the thermostat commissioning screens. All zone CFM settings will be selected from commissioningscreens for continuous blower and both heating / cooling blower operations. Testing CFMs for each or all zones mayalso be performed.

1. The extended damper transformer will only supply power to extended dampers and relay contacts.

2. The system transformer powers the relay coils (0.4VA each).

3. Combined load of damper transformer (see table 1) and add 0.4VA per zone relay to determine the minimumdamper transformer VA requirements. Total VA requirements should not exceed 60VA.

MAINPOWER

MAINPOWER

NOTE 1: Connections illustrated here are for the Lennox recommended springopen/powerclose dampers. Theconnections would be different for other dampers.

NOTE 2: Use Lennox Part 56L68 for zone relays 1 through 4.

DAMPER TRANSFORMER – POWERS DAMPER CONTROL MODULE,INZONE THERMOSTATS, DAMPERS, AND EXTENDED ZONE RELAYS.

Figure 2. Damper and Extended Damper Wiring Diagram

507132-02

coil

FURNACEFRONTVIEW

1/2 the width

of theplenum

� When possible, position the sensor some distance away from the coil rather than in the immediate coil area.

The Discharge Air Temperature Sensor should be located at least 19 inches above the air handler unit and 10

inches above cooling coil with a furnace. Locate the tip of the sensor 1/2 the depth of the plenum, and centeredover the discharge airflow, sidetoside in the discharge plenum

� Fasten the sensor bracket to the plenum with two self‐ tapping sheet metal screws.

� Connect wires to DATS on damper control module, NOT on the AHC or IFC.

10 (254)

AIR HANDLERSIDE VIEW

ECBElectric

HeatStrips

NOTE: FOR UNITS WITH HUMIDITROL—Discharge air sensor temperature (DATS) MUST be located on the output side of the EDA (ifused; see Humiditrol Zoning Accessory Installation 505,337M)

PLENUM

SENSORMOUNTING

DETAIL

19(486)

Damper Control Module

Figure 3. Discharge Air Temperature Sensor installation (Typical Upflow Furnace)

DISCHARGE AIR TEMPERATURE SENSOR (DATS)

The included discharge air temperature sensor (88K38)monitors the supply air. Figure 4 shows the discharge airtemperature sensor. This electronic sensor's probe isinserted into the discharge air plenum (see figure 3 on page4) to gather air temperature data for the zone controlmodule.

Figure 4. Discharge Air Temperature Sensor (DATS)

IMPORTANTIf the DAT sensor has failed, shorted or not installed, iHarmony will only operate in central mode. This mode is alsoindicated by the DCM central mode LED being on. Thereis no notification by the thermostat for this issue.

Table 2. DATS Temperature / Resistance Chart

°C °F

Sensor(ohm)

VDC(Volts) °C °F

Sensor(ohm)

VDC(Volts)

-6.6 20 46,134 1.5129 46.2 115 4,169 0.3041

-3.9 25 39,869 1.4245 49 120 3,749 0.2768

-1.1 30 34,520 1.3354 51.8 125 3,368 0.2515

1.7 35 29,936 1.2465 54.5 130 3,037 0.2291

4.4 40 26,104 1.1611 57.3 135 2,750 0.2092

7.2 45 22,764 1.0765 60 140 2,489 0.1909

10.1 50 19,842 0.9932 62.8 145 2,250 0.1738

12.8 55 17,406 0.9159 65.7 150 2,033 0.1581

15.6 60 15,294 0.8422 68.5 155 1,847 0.1445

18.4 65 13,442 0.7717 71.3 160 1,678 0.1320

21.2 70 11,849 0.7061 73.9 165 1,536 0.1214

23.9 75 10,501 0.6465 76.8 170 1,397 0.1109

26.7 80 9,282 0.5892 79.7 175 1,272 0.1014

29.5 85 8,233 0.5369 82.2 180 1,170 0.0935

32.3 90 7,322 0.4891 85.1 185 1,070 0.0858

35 95 6,523 0.4452 87.8 190 982 0.0789

37.8 100 5,819 0.4050 90.8 195 895 0.0722

40.6 105 5,193 0.3678 93.4 200 829 0.0671

43.4 110 4,654 0.3347

PRESSURE SWITCH

(required for heat pump applications)

NOTE: Outdoor unit (heat pump) will not operate if pressure

switch is not installed)

A field-provided HFC-410A pressure switch (catalognumber 27W13) is required for applications with a Lennoxheat pump. This switch protects the system in the event ahigh pressure condition occurs in the outdoor unit duringheating mode. The switch operates in tandem with thefactory installed high pressure switch, but connects to theiHarmony control instead. The switch is an auto-reset typethat opens at 550 psig and closes at 425 psig.

NOTE: If a pressure switch is factory installed in the outdoor

unit, do not remove the switch or switch wires.

The damper control module pressure switch may also befastened directly to the vapor valve service port using afield-provided tee adapter. This line becomes the dischargeline in heat pump heating mode. Recommend using pressureswitch valve tee adaptor (catalog number 87071).

Other conditions:

� Pressure switch status is used only for the heat pump

heating and does not have any affect on non-zonedemands.

� Heat pump will stop after the pressure switch status

remains open for 60 seconds.

HIGH PRESSURESWITCH (27W13)

NEW SERVICEPORT

CAUTION - High Pressure Switch must be installed on open side oftee first to prevent refrigerant loss.

Pressure switch 27W13 should be installed near Air Handler or IndoorCoil. If installed at outdoor unit, a separate 2-wire conductor must beused for communicating outdoor systems.

VALVE DEPRESSORTEE (LENNOX 87071)

Figure 5. Tee and Vapor Line High Pressure Switch

Staged Heat Pump Units

Should the pressure switch open during heat pump heatingsecond stage operation:

� iComfort® thermostat will downstage the heat pump

from second stage to first stage heating operation inorder to bring the system pressure down to a point

where the switch closes again.

� If the unit is already running in first stage when the

pressure switch opens, the unit will shut off.

� If the switch closes within 60 seconds, then the

iComfort® series thermostat may send demand for

second stage HP if needed.

� If the switch does not close within 60 seconds, the

iComfort® thermostat stops heat pump heating andsatisfies the heating demand with backup heat (backup

heat is either electric or gas) regardless of the ambienttemperature being above the high balance point.

The heat pump is used again on the next call provided thepressure switch has closed; otherwise backup heat is usedon subsequent heating calls until the pressure switchcloses.

MODULATING HEAT PUMP UNIT (XP20 AND XP25)

If the pressure switch opens during heat pump heatingoperation:

� iComfort® series thermostat will respond by sending a

HP heat demand with the demanded rate equal to thecurrent rate 25%. (i.e. the switch opens during a 90%

heating demand,

� iComfort® thermostat then sends a demand for 9025 =

65%) If new calculated rate is below the minimum for theunit, minimum demand is sent.

� If the switch closes within 60 seconds, then the

iComfort® series thermostat may send change thedemand for the HP as determined by the DATS.

� If the switch does not close within 60 seconds, the

iComfort® series thermostat stops HP heating and

satisfies the heating demand with backup heat (backupheat is either electric or gas) regardless of the ambient

temperature being above the hi balance point.

The heat pump is used again on the next call provided thepressure switch has closed; otherwise backup heat is usedon subsequent heating calls until the pressure switchcloses.

FREEZESTAT (OPTIONAL)

This optional component is only required if there is a smallzone with little airflow which is causing the indoor coil tofreeze up. However, normal return air temperature shouldprevent this from occurring. The addition of the freezestatwill provide for added protection.

NOTE: The damper control module comes from the factory

with a insertion bridge installed on the freezestat terminals

(see figure 8). Do not remove unless a freezestat is

connected. Outdoor unit will not operate if insertion bridge is

removed (missing) and no freezestat is installed.

The table below lists available freezestats for use with thedamper control module.

Table 3. Available Freezestats

CatalogNumber

PipingSize Description

93G35 ⅜” Opens at 29°F, and closes at 58°F

50A93 ⅝” Opens at 36°F, and closes at 58°F

Suggested Freezestat Installation Method

The following is the recommended method for installation ofthe freezestat for connection to the damper control module.

1. A freezestat, sized per table 3 and ordered separately,can be installed. Install the freezestat on one of thecopper lines between the last hairpins and the suctionmanifold (see figure 6) of the indoor coil.

2. The freezestat senses the line temperature and cyclesthe compressor off when the line temperature fails

507132-02

below its setpoint. The freezestat will open and close aslisted in table 3.

3. Connect freezestat wires to the freezestat terminals onthe damper control module after removing the factoryinstalled bridge (see figure 8).

CLIPCOPPERLINE

EXPANSIONVALVE

FREEZESTAT

SUCTIONMANIFOLD

LIQUID LINE

LAST HAIRPINS

COPPER LINES

Figure 6. Typical Freezestat Installation (Indoor Coil)

Hardware Installation and Setup

DAMPER CONTROL MODULE JUMPER SETTINGS,LEDS AND CONNECTIONS

Use the following procedure to install the damper controlmodule. For information concerning connections see table 4on page 7.

1. Remove the module cover.

2. Install the damper control module near the indoor unitusing provided fasteners.

NOTE: DO NOT install damper control module assembly toindoor unit or equipment that could induce vibration to themodule. Install assembly on flat surface away from indoorunit to minimize vibration. Securing assembly to a wall studis desirable.

NOTE: By relocating the jumper to system terminals youcan shift the VA load from the damper transformer to the

system transformer if needed.

3. Use the default jumper setting for using an external24VAC transformer (DMPR XFMR). Connect the

external 24VAC transformer wires to terminals DMPRXFMR R and C (see figure 8).

4. Verify that the ZONE ID jumper is set to Zone 1-4 only.

NOTE: In-zone thermostats control zones 2, 3 and 4. TheiComfort® series thermostat will always control zone 1.

5. Connect wiring from iComfort®enabled indoor unit to todamper control module RSBus terminals markedINDOOR, R, I+, I and C (see figure 8).

IMPORTANT: Do not use the terminals marked TSTAT. onthe damper control. The iComfort® series thermostat mustbe connected directly to the indoor unit terminals.

6. Connect in-zone thermostats from zones 2, 3 and 4 asneeded to terminals PWR, D+, D- and C (see figure 8).

NOTE: In-zone thermostats are 12VDC devices thatare powered by the damper control module.

7. Connect zone dampers to proper terminals. Damperscan be power-open / spring-close, power-close /spring-open, or power-open / power-close type.Connect to NC or NO and DCOM, depending on type ofdamper being employed. Power-closed / spring-open isthe recommend damper and would be connected to NOand DCOM.

8. See table 4 for required and optional device connectionsto various terminals

9. LEDs — See table 5 for complete descriptions forvarious LED functions.

10. Fuse —The control has a 3 amp fuse.

11. Error Codes—The damper control module stores NOerror codes; all codes are sent directly to thermostat.For a list of errors that are sent to the thermostat, seetable 11 on page 18.

ICOMFORT INDOOR CONTROL LINK SETTINGS

When using the iHarmony® zoning system with a iComfortIndoor unit and non-iComfort (24VAC) outdoor unit allapplicable control links illustrated in figure 7 should beconfigured as indicated. Failure to cut or not cut only therequired links will result in the system being inoperable.

ICOMFORT® INDOOR CONTROLSLINKS

Y1 - Y2 TWO-STAGE COMPR (CUTONLY FOR TWO-STAGE AIRCONDITIONER SYSTEMS)

DS TO R DEHUM OR HARMONY (CUTONLY FOR AUX DEHUM OR HARMONYIII)

O - R HEAT PUMP (CUT ONLY IF 24VACHEAT PUMP IS INSTALLED)

Figure 7. Cutting Indoor Unit iComfort Control Links(Air Handler and Integrated Furnace Controls)

Table 4. Damper Control Connections, Insertion Bridge and Jumpers

Damper Control Label Description

TSTAT

C

Do not use these terminals. Connect the iComfort series thermostat directly to the indoor unit terminals. See figure 8 onpage 8 for wiring.

i+

I-

R

INDOOR (Connection to iComfort furnace or air handler)

C RSBus 24VAC common

i+ RSBus data positive

I- RSBus data negative

R RSBus 24VAC power

DMPR XFMR / SYSXFMR

Use factory default position.

DMPR XFMRConnect zone damper 24VAC transformer wires to terminals DMPR R and XFMR C (see figure 8). Factory default isDMPR XFMR.

GSENSE

Connect the IAQ device requiring blower operation to the indoor unit control G terminal as illustrated inthe wiring diagrams located in the applicable iComfort Series Thermostat Installer Guide.

Place a wire jumper between the indoor unit G and damper control module G sense terminals. This willallow the damper control module to adjust the indoor blower CFM from continuous blower speed to thecorrect zone heating or cooling blower speed when any zone has a demand for heating or cooling.

24VAC 24VAC power (NOT USED)

FREEZESTAT

SENSE From the factory, an insertion bridge is installed between these two terminals. If a freezestat is to beused, remove insertion bridge and replace with connections to freezestat. See table 3 on page 5 forordering freezestat. NOTE: If jumper is missing and no freezestat is installed the outdoor unit willnot operate.24VAC

PRESSURE S/WSENSE A HFC-410A pressure switch (catalog number 27W13) is required for applications with a Lennox heat

pump. This switch acts as a guard in case of high head pressures during first- and second-stage heating.The switch opens at 550 psig (3965 kPa) and closes (resets) at 425 psig (3102 kPa).24VAC

DATSSENSE Terminals for the included discharge air temperature sensor (DATS). See figure 3 for installation require

ments.24VAC

ZONE 5 (not used),ZONE 2/6, ZONE 3/7

and ZONE 4/8

(NOTE: ONLY ZONES2, 3 and 4) are used.)

PWR In-Zone Thermostat 12VDC power.

D+ In-Zone Thermostat data positive

D- In-Zone Thermostat data negative

C In-Zone Thermostat 12VDC common

DAMPER 1/5, DAMPER2/6, DAMPER 3/7 and

DAMPER 4/8

NC Normally closed.

NO Normally opened.

DCOM Common

ZONE 1 - 4 / 5 - 8 The factory default for this jumper is 1-4. Do not set jumper to 5-8, which is not in use at this time.

Table 5. LEDs

LED IndicatorLabel/Name Color

Description

DMPR1, 2, 3, 4Damper position LED. Illuminated when damper is power closed. LED will remain ON as as long as the damper is power-closed.

CNTRL Red Illuminated when system zoning is OFF.

STATUS Green

This green LED should blink at 1Hz, 50% duty cycle as a ”heartbeat” indicating that the device is operating normally.

During device soft disable state, this LED will blink 3 seconds ON and 1 second OFF. See page 9 forfurther details.

RSBUS COMM Green RSBus activity. Active communications with external device (iComfort™-enabled external device).

IN-ZONETHERMOSTAT COMM

Green Active communication with in-zone thermostats.

PS Red Illuminate when pressure switch is open (high pressure detected).

507132-02

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Figure 8. Damper Control Jumpers and Connections

iComfort® Wi-Fi Thermostat — Installer Zoning Control Settings

ZONING CONTROL PARAMETERS FOR IHARMONY®

ZONING SYSTEM

Refer to the iComfort Wi-Fi® Thermostat Installer's SystemSetup Guide to navigate to the system devices list. Use thefollowing procedure to configure available parameters forthe damper control module primary parameters.

Use arrows (see figure 9) to select a device from the “systemdevices” list; then use the about button to view informationabout communicating devices (information about otherdevices is not available).

system devices

To adjust a setting,highlight it, thenpress Edit

furnace

aboutSystem

Furnace

Thermostat

2 Stage HP Unit

Zoning Control

Reset All

edit

Figure 9. Select Zoning Control

system devices To adjust a setting,highlight it, thenpress Edit

furnace

aboutSystem

Furnace

Thermostat

2 Stage HP Unit

Power (120VAC) Humidifier

Zoning Control

reset All

edit

Furnace

Equipment Name

Zone 2 Temp Reading Calibration




1

current value:

edit

Zone 2 Temp ReadingCalibration

set-to

1cancelsave

C

E

F

reset

9:39 am January 23, 2012

A

B

D

Range is -5 to 5Default is 0, inc: 1

Figure 10. Adjusting System Devices > ZoningControl Parameters for iHarmony® zoning system

Use back to return to the previous screen or next to go on. Acomplete list of parameters, their defaults and settingranges is listed in figure 10.

1. In the “system devices” screen, use the arrows (A) tohighlight Zoning Control and press edit (B).

2. Touch one of the listed options (C) to select for example“Zone 2 Temp Reading Calibration”. Press edit (D) tocontinue.

3. Use up or down arrows (E) to change the value.

4. Press save (F). Change other red settings (if present)using a similar process.

After completing the settings press the back button tocontinue. On the “system devices” screen, continue bypressing the next button.

Table 6. Adjustable Parameters for iHarmony® ZoningSystem)

ParameterName

Default Min. Max. Incr.ParameterDescription

Zone 2through 4Temp ReadingCalibration

0ºF -5ºF 5ºF 1ºF

Recalibrating thein-zone thermostattemperature reading.

SYSTEM PARAMETERS FOR IHARMONY® ZONINGSYSTEM

Refer to the iComfort Wi-Fi® Installer's System Setup Guideto navigate to the system devices list.

Use arrows (see figure 11) to select a device from the“system devices” list; then use the about button to viewinformation about communicating devices (informationabout other devices is not available).

system devices

To adjust a setting,highlight it, thenpress Edit

furnace

aboutSystem

Furnace

Thermostat

2 Stage HP Unit

Zoning Control

Reset All

edit

Figure 11. Select Zoning Control

A complete list of defaults and ranges are listed in figure 10.

1. In the system devices screen, use the arrows (A) tohighlight System and press edit (B).

2. Touch one of the options (C) to select for exampleZoning Target Supply Air Temp for Cooling. Pressedit (D) to continue.

3. Use up or down arrows (E) to change the value.

4. Press save (F). Change other red settings (if present)using a similar process.

system devices To adjust a setting,highlight it, thenpress Edit

furnace

aboutSystem

Furnace

Thermostat

2 Stage HP Unit

Zoning Control

reset All

edit

Furnace

Equipment Name

Zoning Target Supply Air Temp C

Zoning Target Supply Air Temp fo

Zoning Target Supply Air Temper

Zoning Target Supply Air Temper

Zoning Supply Air Temp Limit for

Zoning Supply Air Temp Limit for

HP heating lockout time

Zoning Target Supply Air Temp C

1

current value:

edit

Zoning Target Supply AirTemp for Cooling

set-to

52cancelsave

C

E

F

reset

9:39 am January 23, 2012

A B

D

Range is 50 to 60Default is 50, inc: 1

Figure 12. Adjusting System Devices > SystemParameters for iHarmony® zoning system

507132-02

After completing the settings press the back button tocontinue. On the system devices screen, continue bypressing the next button.

TO EDIT AND TEST AIRFLOW PER ZONE

Use the following procedure to edit and begin test procedureairflow per each zone. The three values listed in figure 13were set in the previous section. However, adjustments canbe made on the Edit and Test Air Flow per Zone screenalso.

NOTE: If the total CFM from calling zones is less than theminimum CFM that the unit will deliver (see table 8), theminimum system CFM will be delivered, not the designCFM.

System Devices > SystemParameter Names

Edit and Test Airflow ScreenParameter Names

Zones 1 - 4 Continuous BlowerCFM

Blower Circulation Airflow

Zones 1 - 4 Cooling CFM Cooling Airflow

Zones 1 - 4 Heating CFM Heating Airflow

1. Select the desired radio button option - BlowerCirculation Airflow, Cooling Airflow or HeatingAirflow (A).

2. Adjust airflow for a specific zone by pressing on thedesired zone (B). Total maximum airflow for all zones inthis example is a combined1250 CFM. Minimum CFMper zone is 50 and maximum is 1250.

3. Adjust airflow by using the up or down arrow to changethe CFM (C).

4. Press start (D) to begin operation for that specific zone.

5. Repeat procedure to configure all applicable zones.

6. Press save (E).

After setting zoning CFMs the next button will appear and letyou proceed to the system testing screen.

Refer to the iComfort Wi-Fi® Thermostat Installer's SystemSetup Guide to proceed with system tests.

9:39 am January 23, 2012

select one

Blower Circulation Airflow

Cooling Airflow

Heating Airflow

Edit and Test Airflow per Zone

Maximum Airflow 1250 CFM

Assigned Airflow 1250 CFM

Zone 1 Zone 2 Zone 3 Zone 4

50 400 400 150

start start start start

stop all save cancel next

B

C

D

E F

All airflows must be selected and verified

A

Sum of airflowselectedbelow.

Maximum airflowavailable for

selected mode atleft of screen.

Figure 13. Editing Zone CFMs

RECORDING AIRFLOW INFORMATION

Use the following table to record each zone's airflow value:

Table 7. Recording Airflow Values

Parameter Zone 1 Zone 2 Zone 3 Zone 4

Continuous CirculationAirflow

Cooling Airflow

Heating Airflow

iComfort Wi-Fi Thermostat — User Zoning ControlUser Settings

When a zone control system has been installed and enabledby the installer, the homeowner has the option to controltemperature or set away mode for each enabled zone.Touch the zone location button as shown below to displaythe AVAILABLE ZONES screen.

indoor temperature

indoor humidity is 41%

fan isOFF

fan isAUTO

cool-to

set temp

75

heat to

72

heator

cool

fan isAUTO

outdoortemperature

80

system is cooling

forecastHi 85Lo 60

20% chance of rain

9:39 am January 23, 2012Wi-Fi

enteraway

Zone 1 ?

Figure 14 shows the AVAILABLE ZONES screen. Thisscreen displays the current temperature, as well as theheating / cooling settings for each zone.

RENAMING ZONES

Touch the zone number of the zone you wish to rename. Anon-screen keyboard will appear to allow you to rename aspecific zone. Touch the save button when you are through.

AVAILABLE ZONES

fan isOFF

fan isAUTO

Den

75

Press any zone button to make this thermostat contr0l that zone.

72

9:39 am January 23, 2012

70

Living Room

7572

70

Zone 3

7572

70

Zone 3

7572

70

Wi-Fi ?Zone 1

Figure 14. Home Screen - Selecting Available ZonesScreen

ADJUSTING ZONE TEMPERATURES

Touch the current temperature reading of any zone that youwish to adjust. This will trigger the appearance of thetemperature adjustment screen. Make desired adjustmentsfor the particular zone as outlined beginning on page 14.

AVAILABLE ZONES

fan isOFF

fan isAUTO

Den

75


72

9:39 am January 23, 2012Wi-Fi ?

70

Living Room

7572

70

Master Bed

7572

70

Zone 3

7572

70

Figure 15. Selecting Available Zones

use arrowsto change

temperature

?

touchcool-tobutton

indoor temperature


fan isOFF

fan isAUTO

cool-to

set temp

75

heat to

70

heator

cool

fan isAUTO

system is cooling

cool-to

set temp

75

coolonly

fan isAUTO

alternatecool-only button

layout

(modebutton)

9:39 am January 23, 2012Wi-Fi ?Living Room

enter

Figure 16. Adjusting Temperature

USING UNIQUE INDIVIDUAL ZONE PROGRAMMINGTEMPERATURES

If you wish to use preset temperature programing forindividual zones then use the following procedure:

1. Give each active zone a unique name as exampled inRENAMING ZONES (kitchen, living, bedroom, etc.).

2. From the Home Screen, select the System Modebutton.

indoor temperature


fan isOFF

fan isAUTO

cool-to

set temp

75

heat to

72

heator

cool

fan isAUTO

outdoortemperature

80

system is cooling

forecastHi 85Lo 60

20% chance of rain

9:39 am January 23, 2012Wi-Fi

enteraway

Zone 1 ?

Figure 17. Selecting System Mode

3. Touch programs and the touch edit programs.

use arrowsto change

temperature

?

touchcool-tobutton

indoor temperature


fan isOFF

fan isAUTO

cool-to

set temp

78

heat to

70

heator

cool

fan isAUTO

system is waiting

cool only

heat only

heat or cool

off

emerg. heat

programs

summer

winter

spring/fall

save energy

custom

edit programs

manual

(modebutton)

9:39 am January 23, 2012Wi-Fi ?Zone 1

Figure 18. Turning on the Program

4. From the EDIT PROGRAMS screen, press and holdeach program list under the select programs columnand rename that program to match the zone namesused in step 1 using the on-screen keyboard. Repeatthis step for each active zone in the system.

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NOTE: In a four zone system, only four uniqueprograms can be used.

EDIT PROGRAMS

summer

selectprograms

summerprogram will follow these settings on mon-fri

winter

spring fall

save energy

custom

06:00 am 78 70 AUTO

selectdays

time cool-to heat-to fan mode

85 6208:00 am AUTO

82 6210:00 pm AUTO

all 7 days

05:00 pm

changedays

press and hold any time to enable or disable for the time period

restore

press/holdprogrambutton torename

9:39 am January 23, 2012 ?Wi-Fi

85 6208:00 am AUTO

Zone 1

Figure 19. EDIT PROGRAMS Screen

5. Adjust individual program time and cool-to, heat-toand fan mode as desired. When done, touch the savebutton.

EDIT PROGRAMS

den

selectprograms

summerprogram will follow these settings on mon-fri

kitchen

Bedroom 1

Bedroom 2

custom

06:00 am 78 70 AUTO

selectdays

time cool-to heat-to fan mode

85 6208:00 am AUTO

82 6210:00 pm AUTO

all 7 days

05:00 pm

changedays

press and hold any time to enable or disable for the time period

save

press/holdprogrambutton torename

9:39 am January 23, 2012 ?Wi-Fi

85 6208:00 am AUTO

den

Figure 20. Adjusting PROGRAM Settings

6. From the Home Screen, select the desire zone, andthen touch the System mode. Example: If the zoneselected in called Den, then select program Den.

use arrowsto change

temperature

?

touchcool-tobutton

indoor temperature


fan isOFF

fan isAUTO

cool-to

set temp

78

heat to

70

heator

cool

fan isAUTO

system is waiting

cool only

heat only

heat or cool

off

emerg. heat

programs

den

living room

bedroom 1

bedroom 2

custom

edit programs

manual

(modebutton)

9:39 am January 23, 2012Wi-Fi ?den

Figure 21. Selecting System Mode

SETTING AWAY MODE PER ZONE

AVAILABLE ZONES

fan isOFF

fan isAUTO

Den

75


72


70

Living Room

7585

62

Master Bed

7585

62

Zone 3

7572

70

Zone 1

Figure 22. Home Screen - Selecting Away Mode forIndividual Zones

The Zone 1 thermostat becomes the system masterthermostat. If the Zone 1 thermostat is set for Away Mode(on the Home Screen), the away mode is enabled for thewhole system (all zones) until canceled.

If zones 2, 3, or 4 are set for Away Mode on the HomeScreen, the Away Mode icon appears at the lower-right ofeach zone button on the AVAILABLE ZONES screen.

CANCELLING AWAY MODE

To adjust the Away mode zone temperature setting or tocancel Away mode for a specific zone, enter the HomeScreen, select the desired zone and touch the Cancel Awayicon located in the upper right-hand corner of the screen.

indoor temperature

cool-to

set temp

82

heat to

60 use arrows to changetemperature


cancelaway

this zone in AWAY mode, use cancel to exit AWAY mode.

Zone 1

Figure 23. Adjusting Temperature or Canceling AwayMode with Program Running (Away Mode)

HOW TO DISABLE ZONING

From the Home screen, select the right arrow to proceed tothe FEATURES screen. Select zone settings and thenselect zoning is ON. This will toggle zoning to OFF. Oncedisabled, zoning information disappears from the status baralong the bottom of the home screen. When zoning hasbeen disabled, the master thermostat controls the entiresystem in single comfort mode.

NOTE: When Zoning is disabled, the in-zone thermostats

are also disabled; however, each of the zone thermostats

continues to display the current temperature for that zone.

The iComfort® logo is also displayed to indicate that zoning

is off.

iComfort® S30 Smart Thermostat — Zoning ControlSettings

After completing the installation of the iHarmony Zoningsystem. Power up the system. From the HD display, use thefollowing procedure to customize the zoning configuration.

1. From the Home screen, press the Menu icon in theupper right-hand corner of the screen.

2. Press settings.

3. Press iHarmony zoning to rename each zone. Eitherpre-defined or custom names can be used.

4. The first line is zoning. Options are ON and OFF. Bydefault zoning is ON.

5. Select the specific zone to rename. Use the enter zonename field to rename the zone. Repeat to proceduresto rename any other zones if desired.

6. Once renaming zones is completed, press advancedsettings.

7. Press view dealer control center.

8. A warning message will appear indicating “intended foruse by qualified Lennox equipment installers only“.Press proceed to continue.

9. Press equipment.

10. Press Zoning Control and modified any of theavailable parameters for zoning control.

ABOUT

This provides information on unit code, language supported,equipment type name, control software revision, controlmodel number, control serial number, control hardwarerevision, protocol revision number, device product level,24VAC average power consumption, 24VAC peak powerconsumption, compatible devices list, application codememory size, micro-controller part number, max number ofzones, supported damper types, number of damperpositions, zone temp sensor 1, zone temp sensor 2, zonetemp sensor 3 and zone temp sensor 4.

EQUIPMENT NAME

A unique name can be assigned to this component. Namecan be up to 29 characters. Name can consist of letters,numbers, special characters and spaces.

ZONES 1 THROUGH 4 TEMP READING CALIBRATION

Allows adjustment to temperature reading displayed onzone thermostat.

RESET ZONING CONTROL

Any installer modifications under the zoning control tab willbe reset back to the factory defaults if the reset zoningcontrol option is used.

iComfort® S30 Smart Thermostat — Smart HubZoning Control Settings

1. From the dealer control center, press equipment

2. Press smart hub..

3. Located and modified any setting related to zoning. Seebelow for list of parameters available for modification.

iComfort® S30 Zoning Control Settings under Smart

Hub

ZONING GAS HEATING DAT COOLDOWN TARGET

At the end of a gas cycle, the Heat Blower Off-Delay may notbe long enough to completely cool the heat exchanger. Thismay result in a primary limit trip then, or at the beginning ofthe next heat demand. This parameter allows the blower torun after a gas heat call ends until the discharge airtemperature sensor (DATS) cools to the temperature set inthe parameter. If the temperature is set too low this willcause the temperature in the room to overshoot.

Range is 80 to 90°F. Default is 85°F. Adjustments are inincrements of 1°F.

ZONING ANTICIPATED DISCHARGE AIRTEMPERATURE ADJUSTMENT

This parameter setting compensates for a rapid change ofthe discharge air temperature due to fast changingconditions. It examines the change in the discharge airtemperature for the previous 2 minutes and extrapolates orlooks forward by the number of seconds set in the parameterand uses this as the DATS value for staging. This parametersetting helps prevent limit trip/frozen coil from occurring.

Range is 0 to 120 seconds. Default is 60 seconds.Adjustments are in increments of 5 seconds.

ZONING TARGET SUPPLY AIR TEMP FOR COOLING

In cooling mode, this setting sets the target discharge airtemperature.


ZONING TARGET SUPPLY AIR TEMP FOR HPHEATING

In heat pump heating mode, this setting sets the targetdischarge air temperature.


ZONING SUPPLY AIR TEMP LIMIT FOR COOLING

In cooling mode, this setting sets the discharge airtemperature low limit. Below this temperature, the cooling isturned off.


ZONING SUPPLY AIR TEMP LIMIT FOR GAS /ELECTRIC HEATING

In heating mode, this setting sets the target discharge airtemperature.


507132-02

HP HEATING LOCKOUT TIME

The HP could not get a zone to progress 0.5°F towards theset point in 120 minutes (Code 40 - Minor alert). System willswitch to secondary heat source. (Electric heat or furnace indual fuel applications). Transition back to Heat Pump normaloperation when termination setting times out.

Range is 60 to 240 minutes. Default is 120 minutes.Adjustments are in increments of 30 minutes.

ZONING MINIMUM ZONE RUN TIME

Range is 90 to 600 seconds. Default is 120 seconds.Adjustments are in increments of 30 seconds.

ZONE 1 THROUGH 4 FIRST STAGE DIFFERENTIAL

Differential is the temperature between when first stage willcycle ON and cycle OFF. (Example: Zone 1 HD Display isset at 70°F with a 1.0°F differential. Cooling Demand -cooling will cycle ON when the room temperature reaches70.5°F and cycle OFF when the room temperature is69.5°F)

Range is 0.5 to 3°F. Default is 1°F. Adjustments are inincrements of 1°F.

NOTE: For XC/XP 25 differentials are ignored.

ZONE 1 THROUGH 4 CONTINUOUS BLOWER CFM

Minimum and maximum CFM will be dependent on systemcomponent configurations. These parameter values areautomatically adjusted to the specific hardwareconfiguration. See iHarmony® zoning system installationinstruction for minimum CFMs for specific indoor units.

Zones requesting the fan ON are only allowed while no otherzone demand is present. The iComfort® S30 will sum all thezone continuous blower CFM requirements and send thecommand only after positioning the dampers and waiting forthe damper close delay period to expire (30 seconds)Continuous blower demands are the lowest prioritydemands, all other conditioning demands will over-ride thecontinuous blower demand.

Range is 5 to maximum of indoor unit. Default is dependenton tonnage of indoor unit. Adjustments are in increments of5 CFM.

iComfort S30 Smart Thermostat — Zoning ControlUser Settings

For information on how to CFMs for each zone, refer to theiComfort S30 Smart Thermostat Setup and InstallationGuide.

1. From the home screen, touch the menu icon (threebars) in the upper right-hand corner of the screen.

2. Touch settings.

3. Touch iHarmony zoning from the list.

4. Zoning and be set to on or off from the iHarmony zoningscreen.

5. Each zone can be rename also from the same screen.

Minimum CFM for iHarmony® Zoning System with

Variable Speed Blower Motors

The table 8 list minimum indoor unit CFMs for use with thedamper control module.

Table 8. Minimum CFM

Unit Model Number CFM(minimum)

**G71MPP-36B-070 250

**G71MPP-36C-090 250

**G71MPP-60C-090 450

**G71MPP-60C-110 450

**G71MPP-60D-135 450

**SLP98xx070V36B 1/2HP motor 250

**SLP98xx090V36C 1/2HP motor 250

**SLP98xx090V48C 3/4HP motor 380

**SLP98xx090V60C 1HP motor 450

**SLP98xx110V60C 1HP motor 450

**SLP98UH135V60D 1HP motor 450

SL280xxV 3-ton 250

SL280xxV 4- & 5-ton 450

EL296xxV 2 & 3-ton 250

EL296xxV 4-ton 380

EL296xxV 5-ton 450

CBX32MV-018/024 250

CBX32MV-024/030 Rev 06 250

CBX32MV-036 Rev 06 250

CBX32MV-048, -060, -068 Rev 06 450

**CBX40UHV-024, -030 250

**CBX40UHV-036 380

**CBX40UHV-042, -048, -060 450

* A 3% duty cycle corresponds to the minimum CFM, and a 97%duty cycle corresponds to the maximum CFM.

** On G71MPP & SLP98 Furnaces and CBX40UHV and CBX32MVrevision 06 Air Handlers, listed values in the table correspond to

0% duty cycle of the iHarmony® zoning system control signal.

Zoning Sequence of Operations

When power is first applied, the green Status LED will flash,indicating that the damper control control is functioningnormally. When the control is first powered on, there is a 5minute minimum time delay during which only the fan outputwill respond.

HEATING / COOLING CHANGEOVER

The following is an example of how the system operatesduring a heating / cooling changeover.

When the system is satisfying a call from zone 1 for heatingand receives a call for cooling from zone 2, the following willoccur:

� Then system will continue to fulfill the demand from

zone 1 until satisfied, or a maximum time of 20 minutes

has occurred.

� If after 20 minutes the system is still operating based on

satisfying the heating demand from zone 1, the system

will terminate that demand.

� The system will then shut system down for five (5)

minutes. This will allow for system temperatures andoperating pressures to stabilize.

� After a five 5 minute delay the system will begin

operations to satisfied the cooling demand from zone 2.

The system will continue to operate in this matter each time itreceives a zone call that is opposite of the current mode ofoperation (heating or cooling).

DAMPER OPERATION

Cooling Operation Conventional Heat/Cool and HeatPump Systems

When a zone thermostat makes a demand for cooling, thezone damper opens and the cooling equipment beginsoperating.

Cooling demand is terminated when:

1. All zone demands for cooling are terminated.

2. The demand has exceeded the heat/cool changeovertime limit (20minutes) while a heat demand exists.

When cooling demand is terminated, a 5 minute minimumoff time delay is initiated.

Second stage cooling is energized when the discharge airtemperature is 7°F higher than the set point of the coolingstaging temperature settings.

Heating Operation Conventional Heat/Cool and HeatPump Systems

When a zone thermostat makes a demand for heating, thezone damper opens and heating equipment beginsoperating. Heating demand is terminated when:

1. All zone demands for heating are terminated.

2. The demand has exceeded the heat/cool changeovertime limit (20minutes) while a cooling demand exists.

When heating demand is terminated, a 5minute minimumoff time delay is initiated.

Second-stage heating is energized if the discharge airtemperature is lower than the set point of the heating stagingtemperature set point.

DUAL-FUEL OPERATION

NOTE: Only iComfort®enabled communicating heat pump

outdoor units may be used with a dual-fuel system.

When both a gas furnace and a heat pump are present onthe system, the thermostat uses the balance points todetermine which source to use for heating.

When the outdoor temperature is above the low balancepoint, the heat pump is always attempted first before usingthe gas furnace.

In order to use the gas furnace as a primary heating source(not defrost tempering) when the outdoor temperature isbetween the high and low balance points, the followingconditions must occur:

� Heat pump must be used for a minimum of 30 minutes.

� Temperature in the zone not increase by more than

0.5°F

� Heat pump has not gone into defrost in the 30 minute

period

If any single-zone satisfies the specified conditions, the heatpump will stop and the gas furnace is used to satisfy all heatcalls for the next duration of the parameter heat pumplockout time. After the heat pump lock out has expired, theheat pump is again used as the primary heat source on thenext call after the equipment has stopped.

Emergency Heat Operation Heat Pump Systems

When the iComfort series thermostat emergency heat isenabled the unit will satisfy all heating demand with eithergas or electric backup heat. When the Emergency Heatsetting is OFF, the heat pump is used to satisfy heatingdemands.

Humidity Control

Refer to either the iComfort Wi-Fi or iComfort S30installation and setup guide for more information on humiditycontrol settings and operating modes. Note there is nocapability to control humidity (humidification ordehumidification) per individual zone. Various humiditycontrol modes would be applicable to the entire home.

507132-02

Zoning Parameters

Table 9. Adjustable System Parameters for iHarmony® Zoning System)Parameter Name: Default Min. Max. Incr. Dependency Parameter Description

Zoning Gas heating DATCool down Target

100°F 80°F 110°F 1°FDamper controlmodule, Furnace

At the end of a gas heat cycle, the Heat BlowerOffDelay may not be long enough to completely coolthe heat exchanger. This may result in a primary limit tripthen, or at the beginning of the next heat demand. Thisparameter allows the blower to run after a gas heat callends until the discharge air temperature sensor (DATS)cools to the temperature set in the parameter. If the temperature is set too low this will cause the temperature inthe room to overshoot.

Zoning AnticipatedDischarge AirTemperature Adjustment

60 secs 0 secs 120 secs 10 secsDamper controlmodule, DATS

This parameter setting compensates for a rapid changeof the discharge air temperature due to fast changingconditions. It examines the change in the discharge airtemperature for the previous 2 minutes and extrapolatesor looks forward by the number of seconds set in theparameter and uses this as the DATS value for staging.This parameter setting helps prevent limit trips/frozencoils from occurring.

Zoning Target Supply AirTemp for Cooling

50ºF 50ºF 60ºF 1°FDamper controlmodule

In cooling mode, this setting sets the target discharge airtemperature.

Zoning Target Supply AirTemp for Gas/ElectricHeating

100ºF 100ºF 130ºF 5°F

Damper controlmodule, Furnaceor air handlerelectric heatsection

In heating mode, this setting sets the target dischargeair temperature.

Zoning Target Supply AirTemp for HP Heating

90ºF 85ºF 110ºF 1°FDamper controlmodule, heat pump

In heat pump heating mode, this setting sets the targetdischarge air temperature.

Zoning Supply Air TempLimit for Cooling

40ºF 35ºF 45ºF 2°F

Damper controlmodule and compressor cooling operation

In cooling mode, this setting sets the discharge air temperature low limit. Below this temperature, the cooling isturned off.

Zoning Supply Air TempLimit for Gas/ElectricHeating

140ºF 140ºF 160ºF 5°F

Damper controlmodule, Furnaceor air handlerelectric heatsection

In heating mode, this setting sets the discharge air temperature high limit. Above this temperature the heating isturned off.

Zone 1 First StageDifferential

1.0ºF 0.5ºF 3.0ºF 0.5ºF

Damper controlmodule

Differential is the temperature difference between whenfirst stage will cycle ON and cycle OFF. (Example: Zone1 thermostat is set at 70°F with a 1.0°F differential.Cooling Demand Cooling will cycle ON when the roomtemperature reaches 70.5°F and cycle OFF when theroom temperature is 69.5°F.)


1.0ºF 0.5ºF 3.0ºF 0.5ºF


1.0ºF 0.5ºF 3.0ºF 0.5ºF


1.0ºF 0.5ºF 3.0ºF 0.5ºF

Table 10. Adjustable System Parameters for iHarmony® Zoning System (Configuration Dependent)Parameter Name: Default Min. Max. Incr. Dependency Parameter Description

Zone 1 ContinuousBlower CFM

Dependent onhardware

configuration

Minimum andmaximum CFM willbe dependent on

system componentconfigurations.

These parametervalues are

automaticallyadjusted to the

specific hardwareconfiguration. (seetable 8 on page 14for minimum CFMsfor specific indoor

units.

5 CFMDampercontrol module

Zones requesting the fan on are only allowed while noother zone demand is present. The thermostat will sumall the zone continuous blower CFM requirements andsend the command only after positioning the dampersand waiting for the damper close delay period to expire. Continuous blower demands are the lowest priority demands, all other conditioning demands will override the continuous blower demand.




Zone 1 Cooling CFM

Target cooling CFM for a specific zone.Zone 2 Cooling CFM

Zone 3 Cooling CFM

Zone 4 Cooling CFM

Zone 1 Heating CFM

Target heating CFM for a specific zone.Zone 2 Heating CFM

Zone 3 Heating CFM

Zone 4 Heating CFM

Soft Disable and Zoning Alert Codes

SOFT DISABLE

Soft disabling is when iComfort® series thermostat finds an

unknown control (indoor or outdoor unit control, iHarmony® zoning

system or Equipment Interface Module (EIM) on the system

communication bus. The room thermostat sends the unknown

control a message to go into soft disable mode until properly

configured.

The iComfort® series thermostat will not show anycode for a soft disabled control. When soft disablingoccurs only the control that has been disabled willdisplay the blinking LED status. In this case, the controlblinks three seconds OFF and one second ON.

Steps to follow if the damper control module is displaying thesoft disable code

1. Confirm proper wiring between all devices (thermostat,damper control module, indoor and outdoor).

2. Cycle power to the control that is displaying the softdisable code.

iComfort Wi-Fi

1. Go to setup / system devices/ thermostat / edit/ pushreset.

2. Go to setup / system devices / thermostat / edit /push resetAll.

iComfort S30 Smart Thermostat

1. From the home screen select menu / settings /advanced settings / view dealer control center /equipment / thermostat and scroll down to resetThermostat.

2. From the home screen select menu / settings /advanced settings / view dealer control center /equipment / reset and scroll down to reset HVACequipment.

507132-02

ALERT CODES

Table 11. Alarm/Fault Name

The following alarms are sent by the damper control module to the iComfort series thermostat. All alarms and faults are

stored in the thermostat only.

iComfort Alert Codes andTroubleshootingDCM = iHarmony® zoning system Damper Control Module

Critical alerts are displayed on thermostat home screen, homeowner alertbutton, and in the Installer alert button. Minor and Moderate alerts are found onlyin the Installer alert button

� Critical means that a service call may be required to get the system running.

� Minor is information only, helps Lennox interpret test results and understand

complicated behavior.

� Moderate means that the system will likely recover on its own, no action

necessary.

Communication System: When communication controls are operating in acommunication system, all jumper and link setting (see figure 7 on page 6) oncontrols are ignored. Jumper and link settings are treated as defaults and wouldonly be active if the system was converted to a non-communicating system.

AlertCode

PriorityAffectedEquipment

Alert Text Possible Cause Corrective actions How to clear alert

105 Moderate DCM

Damper controlmodule has lostcommunication withthe rest of thesystem.

NOTE: DCM isautomatically placedin non-zoning mode

Poor electricalconnections on DCM,thermostat, indoor oroutdoor unit.

Electrical noise due tohigh voltage powermixed withcommunication wiring.

Check for poor or looselow voltage orcommunication wiring.Check for high voltagesources of noise close tothe low voltage wiring.Generally, this is aself-recoverable error.

The DCM will reset whencommunication is restored along with automatically clearing thealert code.

114Moderate /Critical

Furnace,Air Handler,DCM andEIM

There is a frequency/ distortion problemwith the power to the(furnace, air handler,DCM or EIM).

NOTE: The prioritystatus will advancefrom moderate tocritical after ten (10)minutes.

This alert code mayindicate transformeroverloading.

1) Check the voltageand line power frequency.

2) If system is runningon backup power,check for generatoroperating frequency.

3) Correct voltage andfrequency problems.

System resumes normaloperation 5 secondsafter fault recovered.


Furnace,Air Handler,DCM andEIM

The 24VAC to asystem component(furnace, air-handlerDCM or EIM) hasdetected lower thanthe required range of18 to 30VAC.

NOTE: The prioritystatus will advancefrom moderate tocritical after ten (10)minutes.

24VAC low power(Operating range is 18to 30 volts).

1) Check and correctvoltage.

2) Check for additionalpower-robbingequipmentconnected tosystem.

3) This alarm/codemay require theinstallation of anadditional or largerVA transformer.

4) If system is runningon backup power,check for generatoroperatingfrequency..

System resumes normaloperation 5 secondsafter fault recovered.

120 Moderate

Thermostat,furnace, airhandler,outdoorunit,equipmentinterface orDCM

There is a delay inthe system component responding tothe system.

� Typically this alertcode does notcause anyoperationalissues and willclear on its own.

� This alert code isusually causedby a delay in theoutdoor unitresponding to thethermostat.

Check all wiringconnections.

Automatically clears afteran unresponsive systemcomponent (device)responds to any inquiry.

AlertCode



124 Critical

Thermostat,Furnace,Air Handler,OutdoorUnit, EIMand DCM

The thermostat haslost communicationwith a systemcomponent for morethan 3 minutes.

NOTE: The DCM willbe placed innon-zoning modeuntil issue isresolved

Check the wiringconnections, ohmwires and cycle power.

The alarm stops allassociated systemoperations and waits for aheartbeat message fromthe system componentthat is notcommunicating.

The alert code isautomatically clearedafter communication isre-established with thespecific systemcomponent.

NOTE: As of July 10,2014, email notificationsare disabled tohomeowner and dealerfor Alert Code 124.

This alert code will stillappear in thermostat,control, consumer anddealer portals.

Email notification willcontinue to be disableduntil the issue iscorrected and tested.

131 Critical

Thermostat,Furnace,Air Handler,OutdoorUnit, EIMand DCM

A system component(thermostat, furnace,air-handler outdoorunit, DCM or EIM)control parametersare corrupted.

Control parameters arecorrupted.

Reconfigure the system.Replace the control ifheating or cooling is notavailable.

Recycle the power.

132 CriticalAir Handlerand DCM

The device's controlsoftware iscorrupted.

Control software iscorrupted.

Recycle power. If failurere-occurs, replace thecontrol. System reset isrequired to recover.

Recycle 24VAC power toreset.

250 ModerateFurnace andDCM

The furnace primarylimit switch is open.

NOTE: If limit switchis not closed withingthree minutes, the unitwill go into a 60minute soft lockout(WatchGuard mode)

1. Low supply air due toplugged or restrictionin system (example:dirty air filter or blockage in duct work)

2. Limit trips will placethe iHarmony® zoning system into non-zone mode.

1. Check for high gas pressure

2. Check for proper airflow.

NOTE: Refer to S&A NoteACC-14-01 - iHarmony®

and SLP98 - InsufficientZone Heating and AlarmCode 250 Issues for corrective actions.

Automatically clears whena heat call ends successfully.

NOTE: If this issue occurred on an iHarmony®

zoning system, the fieldwill need to manually activate the zoning.

310 Moderate

Furnaceand AirHandleronly

There is a dischargeair temperaturesensor issue.

NOTE: If DATsensor has failed ornot installed,iHarmony willoperate in centralmode. This is alsoindicated by theDCM central modeLED being on. Alertcode 310 will notappear for thisspecific issue.

Open, shorted or out oftemperature sensorrange.

Compare discharge temperature sensor resistance to temperature/resistance charts in installation instructions. Replacesensor if necessary.

NOTE: Confirm there isno short or open circuitsin the iComfort thermostatconnections to any of theother components in the

communication system.

Automatically clears 30seconds after conditionis detected as recovered

or after system restart.


DCM

Low voltage supplyis < 18VAC. Systemwill be put in nonzoning mode(Central mode)during this condition.

NOTE: Advancesfrom moderate tocritical after ten (10)minutes. System willremain in non zoningmode (Central mode)for 5 minutes afteralarm clears.

Low main power oroverloaded secondarytransformer.

Check main power andtransformer loading.

To clear, recycle 24VACpower to indoor unit andDCM.

507132-02

AlertCode



532 Moderate DCM

Compressor iscycled off due tooperating pressuresat or above 550 psigon pressure switch27W13. Zonesystem reverts tosingle zone mode.Pressure switchrests at 425 psig.

Dirty filter or restrictedducting or coils. Insufficient air volume delivered to zone.

Check for sufficient air tozones and proper operation of zone dampers.Check for dirty or restricted indoor and outdoorcoils. Confirm high pressure switch is connectedinto iHarmony DamperControl Module.

Zoning will be restoredonce the automatic resethigh pressure switchcloses.


Zone 1TempSensor

Zone X TemperatureSensor Problem.Invalid temperaturereading.

NOTE: Advancesfrom moderate tocritical after ten (10)minutes.

Conditions aroundzone thermostat isaffecting temperaturecontrol. Open or shortsensor detected.

Check temperature atzone thermostat. Checkconditions around zonethermostat for ambientconditions that could affect temperature control.

Example:Cool air blowingon thermostat)

System is restored 30seconds after fault is recovered.


Zone 2TempSensor


Zone 3TempSensor


Zone 4TempSensor

/ColorImageDict > /JPEG2000ColorACSImageDict > /JPEG2000ColorImageDict > /AntiAliasGrayImages false /CropGrayImages true /GrayImageMinResolution 300 /GrayImageMinResolutionPolicy /OK /DownsampleGrayImages true /GrayImageDownsampleType /Bicubic /GrayImageResolution 300 /GrayImageDepth -1 /GrayImageMinDownsampleDepth 2 /GrayImageDownsampleThreshold 1.50000 /EncodeGrayImages true /GrayImageFilter /DCTEncode /AutoFilterGrayImages true /GrayImageAutoFilterStrategy /JPEG /GrayACSImageDict > /GrayImageDict > /JPEG2000GrayACSImageDict > /JPEG2000GrayImageDict > /AntiAliasMonoImages false /CropMonoImages true /MonoImageMinResolution 1200 /MonoImageMinResolutionPolicy /OK /DownsampleMonoImages true /MonoImageDownsampleType /Bicubic /MonoImageResolution 1200 /MonoImageDepth -1 /MonoImageDownsampleThreshold 1.50000 /EncodeMonoImages true /MonoImageFilter /CCITTFaxEncode /MonoImageDict > /AllowPSXObjects false /CheckCompliance [ /None ] /PDFX1aCheck false /PDFX3Check false /PDFXCompliantPDFOnly false /PDFXNoTrimBoxError true /PDFXTrimBoxToMediaBoxOffset [ 0.00000 0.00000 0.00000 0.00000 ] /PDFXSetBleedBoxToMediaBox true /PDFXBleedBoxToTrimBoxOffset [ 0.00000 0.00000 0.00000 0.00000 ] /PDFXOutputIntentProfile () /PDFXOutputConditionIdentifier () /PDFXOutputCondition () /PDFXRegistryName () /PDFXTrapped /False

/CreateJDFFile false /Description > /Namespace [ (Adobe) (Common) (1.0) ] /OtherNamespaces [ > /FormElements false /GenerateStructure false /IncludeBookmarks false /IncludeHyperlinks false /IncludeInteractive false /IncludeLayers false /IncludeProfiles false /MultimediaHandling /UseObjectSettings /Namespace [ (Adobe) (CreativeSuite) (2.0) ] /PDFXOutputIntentProfileSelector /DocumentCMYK /PreserveEditing true /UntaggedCMYKHandling /LeaveUntagged /UntaggedRGBHandling /UseDocumentProfile /UseDocumentBleed false >> ]>> setdistillerparams> setpagedevice

Documents

2016 Lennox Industries Inc. iHarmony Dallas, Texas, USA · 2017. 10. 17. · HP heat demand with the demanded rate equal to the current rate 25%. (i.e. the switch opens during a 90%