Lennox EL296DF045XV36B, EL296DF110XV60C, EL296DF070XV48B, EL296DF090XV60C Unit Information

Service Literature

Corp. 1126-L5

Revised 01/2018

EL296DFV(X)

icomfort

EL296DFV(X) series units are 90% efficiency gas furnaces used for upflow or horizontal applications only, manufac tured with Lennox Duralok heat exchangers formed of aluminized steel. EL296DFV(X) units are available in heat ing capacities of 44,000 to 110,000 Btuh and cooling ap plications up to 5 tons. Refer to Engineering Handbook for proper sizing.

Units are factory equipped for use with natural gas. Kits are available for conversion to LPG operation. EL296DFV(X) model units are equipped with the icomfort

eLight EL296DFV(X) unit meets the California Nitrogen Oxides (NO quirements. All units use a redundant gas valve to assure safety shut-off as required by C.S.A.

All specifications in this manual are subject to change. Pro cedures outlined in this manual are presented as a recom mendation only and do not supersede or replace local or state codes. In the absence of local or state codes, the guidelines and procedures outlined in this manual (except where noted) are recommendations only and do not consti tute code.

Specifications Page 2.............................

I Unit Components Page 5........................

II Installation Page 31.............................

III Start Up Page 55..............................

IV Heating System Service Checks Page 56.........

V Typical Operating Characteristics Page 59.........

VI Maintenance Page 59..........................

VII Wiring and Sequence of Operation Page 62......

VIII Field Wiring and Jumper Settings Page 67.......

IX Program Unit Capacity Size Mode Page 71.......

X Troubleshooting Page 72........................

two-stage variable speed integrated control.

) Standards and California Seasonal Efficiency re

TABLE OF CONTENTS

- ENABLED EL296DFV(X) SERIES UNITS

enabled Sur

WARNING

Improper installation, adjustment, alteration, service or maintenance can cause property damage, person al injury or loss of life. Installation and service must be performed by a licensed professional HVAC in staller (or equivalent), service agency or the gas sup plier.

CAUTION

As with any mechanical equipment, contact with sharp sheet metal edges can result in personal in jury. Take care while handling this equipment and wear gloves and protective clothing.

Page 1

SPECIFICATIONS

Gas Heating Performance

High Fire

Temperature rise range - °F 35-65 35-65 40-70 45-75

Gas Manifold Pressure (in. w.g.)

Nat. Gas / LPG/Propane

Low Fire

Temperature rise range - °F 20 - 50 25 - 55 30 - 60 35 - 65

Gas Manifold Pressure (in. w.g.)

Nat. Gas / LPG/Propane

High static in. w.g.

Connections in.

Intake / Exhaust Pipe (PVC) 2 / 2 2 / 2 2 / 2 2 / 2

Gas pipe size IPS 1/2 1/2 1/2 1/2

Condensate Drain Trap (PVC pipe) - i.d. 1/2 1/2 1/2 1/2

with furnished 90° street elbow 1/2 slip x 1/2 Mipt 1/2 slip x 1/2 Mipt 1/2 slip x 1/2 Mipt 1/2 slip x 1/2 Mipt

with eld supplied (PVC coupling) - o.d. 1/2 slip x 1/2 NPT 1/2 slip x 1/2 NPT 1/2 slip x 1/2 NPT 1/2 slip x 1/2 NPT

Indoor

Wheel nom. diameter x width - in. 10 x 9 11 x 10 11 x 11 11 x 11

Blower

Tons of add-on cooling 2 - 3 2.5 - 4 3 - 5 3 - 5

Air Volume Range - cfm 545 - 1360 575 - 1800 890 - 2130 860 - 2180

Electrical

Data

Blower motor full load amps 7.7

Maximum overcurrent protection 15 20 20 20

Shipping Data lbs. - 1 package 131 136 164 176

Annual Fuel Utilization Efciency based on DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non-weatherized

Model No. EL296DF045XV36B EL296DF070XV48B EL296DF090XV60C EL296DF110XV60C

AFUE 96% 96% 96% 96%

Input - Btuh 44,000 66,000 88,000 110,000

Output - Btuh 43,000 64,000 85,000 106,000

3.5 / 10.0 3.5 / 10.0 3.5 / 10.0 3.5 / 10.0

Input - Btuh 29,000 43,000 57,000 72,000

Output - Btuh 28,000 42,000 56,000 70,000

1.7 / 4.9 1.7 / 4.9 1.7 / 4.9 1.7 / 4.9

Heating 0.8 0.8 0.8 0.8

Cooling 1.0 1.0 1.0 1.0

Motor output - hp 1/2 3/4 1 1

Voltage 120 volts - 60 hertz - 1 phase

10.1 12.8 12.8

NOTE - Filters and provisions for mounting are not furnished and must be eld provided.

furnaces.

INSTALLATION CLEARANCES

Sides

Rear 0 inches (0 mm)

Top/Plenum 1 inch (25 mm)

Front 0 inches (0 mm)

Front (service/alcove) 24 inches (610 mm)

Floor

NOTE - Air for combustion must conform to the methods outlined in the National Fuel Gas Code (NFPA 54/ANSI-

NOTE - In the U.S. ue sizing must conform to the methods outlined in the current National Fuel Gas Code (NFPA

Z223.1) or the National Standard of Canada CAN/CSA-B149.1 “Natural Gas and Propane Installation

54/ANSI-Z223.1) or applicable provisions of local building codes. In Canada ue sizing must conform to

Clearance for installation on combustible oor if Optional Downow Combustible Flooring Base is installed be-

tween furnace and combustible oor. Not required in add-on cooling applications if installed in accordance with

local codes or National Fuel Gas Code ANSI-Z223.1 or CAN/CGA-149.1,.2. Do not install the furnace directly on

the methods outlined in National Standard of Canada CAN/CSA-B149.1.

Allow proper clearances to accommodate condensate trap and vent pipe installation.

carpeting, tile, or other combustible materials other than wood ooring.

Code”.

Page 2

0 inches (0 mm)

Combustible

OPTIONAL ACCESSORIES - ORDER SEPARATELY

NOTE - FURNACES CANNOT BE TWINNED!

“B” Width Models “C” Width Models

CABINET ACCESSORIES

Downow Combustible Flooring Base 11M60 11M61

CONDENSATE DRAIN KITS

Condensate Drain Heat Cable 6 ft. 26K68 26K68

24 ft. 26K69 26K69

50 ft. 26K70 26K70

Heat Cable Tape Fiberglass - 1/2 in. x 66 ft. 36G53 36G53

Aluminum foil - 2 in. x 60 ft. 16P89 16P89

Crawl Space Vent Drain Kit US 51W18 51W18

Canada 51W19 51W19

CONTROLS

icomfort Touch® Communicating Thermostat 49W95 49W95

Remote Outdoor Temperature Sensor

(for dual fuel and Humiditrol®)

Discharge Temperature Sensor 88K38 88K38

ComfortSense

Remote Outdoor Temperature Sensor

7000 Thermostat Y2081 Y2081

(for dual fuel and Humiditrol)

FILTERS

Downow Filter Cabinet 51W07 51W08

No. and Size of lter - in. (2) 16 x 20 x 1 (2) 16 x 20 x 1

NIGHT SERVICE KITS

Night Service Kit 14C99 14C99

Universal Service Kit - Switches 89W20 89W20

TERMINATION KITS

See Installation Instructions for specic venting information.

Termination Kits Direct Vent Applications Only

Concentric US - 2 in. 71M80 69M29

3 in. - - - 60L46

Canada - 2 in. 44W92 44W92

3 in. - - - 44W93

Flush-Mount US - 2, 2-1/2 or 3 in. 51W11 51W11

Canada - 2, 2-1/2 or 3 in. 51W12 51W12

Wall - Close

Couple

Wall - Close

Couple WTK

Termination Kits Direct or Non-Direct vent

Roof Termination Flashing Kit - Direct or Non-Direct Vent

Wall Ring Kit 2 in. 15F74

Roof 2 in. 15F75 15F75

US - 2 in. 22G44 - - -

3 in. 44J40 44J40

Canada - 2 in. 30G28 - - -

3 in. 81J20 81J20

2 in. 44J41 44J41

(2 ashings)

VENTING

Left Side Vent Kit 2 or 3 in. 87W73 87W73

Remote Outdoor Sensor may be used with an icomfort®-enabled outdoor unit for a secondary (alternate) sensor reading. Sensor may also be used with a conventional

Remote Outdoor Temperature Sensor for ComfortSense 7000 Thermostat must be connected directly to the thermostat, Do not connect it directly to the icomfort® control.

Kits contain enough parts for two, non-direct vent installations.

NOTE - The curved exhaust pipe furnished with the Left Side Vent Kit counts as one additional 2 in. diameter 90° elbow. When using 3 in. diameter pipe, the furnished

curved exhaust pipe and eld provided ttings to transition from 2 in. to 3 in. count as 20 feet of equivalent pipe on all units.

NOTE - Termination Kits 44W92, 44W93, 30G28, 51W12, 51W19, 81J20 are certied to ULC S636 standard for use in Canada only.

Optional for service diagnostics.

Cleanable polyurethane, frame-type lter.

outdoor unit.

Non-direct vent only.

X2658 X2658

15F74

Page 3

CONTROL BOX

(Includes integrated control,

transformer and door switch)

EL296DFV PARTS IDENTIFICATION

VARIABLE SPEED MOTOR

(hidden)

BAG ASSEMBLY (shipping location)

COMBUSTION AIR INDUCER

OUTER

ACCESS

PANEL

COMBUSTION AIR INDUCER

PRESSURE SWITCH

BURNER BOX ASSEMBLY

(includes sensor, rollout switches and ignitor)

GAS VALVE

FIGURE 1

COLD END HEADER BOX

PRIMARY LIMIT

BLOWER DECK

DuralokPlus

HEAT EXCHANGER

ASSEMBLY

Page 4

I-UNIT COMPONENTS

EL296DFV(X) unit components are shown in figure 1. The gas valve, combustion air inducer and burners can be ac cessed by removing the access panel. Electrical compo nents are in the control box (figure 2) found in the blower section.

CAUTION

Electrostatic discharge can affect elec tronic components. Take precautions to neutralize electrostatic charge by touching your hand and tools to metal prior to handling the control.

A- Control Box

1. Control Transformer (T1)

A transformer located in the control box provides power to the low voltage section of the unit. Transformers on all models are rated 40VA with a 120V primary and a 24V sec ondary.

2. Door Interlock Switch (S51)

A door interlock switch rated 14A at 125VAC is wired in se ries with line voltage. When the inner blower access panel is removed the unit will shut down.

CONTROL BOX EL296DFV

Transformer

Circuit Breaker

Interlock Switch

SureLight

3. Circuit Breaker (CB8)

A 24V circuit breaker is also located in the control box. The switch provides overcurrent protection to the trans former (T1). The breaker is rated 3A at 32V. If the current exceeds this limit the breaker will trip and all unit opera tion will shutdown. The breaker can be manually reset by pressing the button on the face. See figure 3.

Integrated Control

FIGURE 2

CIRCUIT BREAKER CB8

PRESS TO RESET

FIGURE 3

WARNING

Shock hazard. Disconnect power before servicing. Integrated

control is not field repairable. If control is inoper able, simply replace entire control.

Can cause injury or death. Unsafe operation will re sult if repair is attempted.

4. Integrated Control (A92)

Units are equipped with the icomfort two-stage, variable speed integrated control. This control is used with the icomfort Touch® thermostat as part of a communicating comfort system. The control can also oper ate with a non-communicating conventional single or twostage thermostat. The system consists of a ignition / blow er control (figures 4 and 5) with control pin designations in tables 1, 2 and 3 and ignitor (figure 13). The control and ignitor work in combination to ensure furnace ignition and ignitor durability. The control provides gas ignition, safety checks and indoor blower control with two-stage gas heat ing. The furnace combustion air inducer, gas valve and in door blower are controlled in response to various system inputs such as thermostat signal, pressure and limit switch signal and flame signal. The control features a seven-seg ment LED display, indicating furnace status (including in door blower) and error codes. The LED flashes in single digits. For example using table 5 under LIMIT CODE, an “E” followed by “2” followed by “5” followed by “0”, the limit switch circuit is open. The control also has two unpowered (dry) 1/4” contacts for a humidifier and a 120 volt accessory terminal. Both rated at (1) one amp each.

Electronic Ignition

At the beginning of the heat cycle the integrated control monitors the first stage and second stage combustion air inducer prove switch. The control will not begin the heating cycle if the first stage prove switch is closed (by-passed). Likewise the integrated control will not begin the second stage heating cycle if the second stage prove switch is closed, and will remain in first stage heat. However, if the second stage prove switch closes during the first stage heat pre-purge, the control will allow second stage heat. Once the first stage prove switch is determined to be open, the combustion air inducer is energized on low (first stage) heat speed. When the differential in the prove switch is great enough, the prove switch closes and a 15-second pre-purge begins.

NOTE - During abnormal conditions such as low supply voltage or low outdoor temperatures and the low fire pres sure switch does not close, the combustion air inducer will switch to high fire. After a 15 second pre-purge the high fire pressure switch will close and the unit will begin operation on high fire. After 10 to 20 seconds of high fire operation the unit will switch to low fire

After the 15-second pre-purge period, the SureLight ignitor warms up for 20 seconds after which the gas valve opens for a 4-second trial for ignition. The ignitor remains ener gized during the trial until flame is sensed. If ignition is not

enabled SureLight

Page 5

proved during the 4-second period, the control will try four more times with an inter purge and warm-up time between trials of 35 seconds. After a total of five trials for ignition (in cluding the initial trial), the control goes into WatchguardFlame Failure mode. After a 60-minute reset period, the control will begin the ignition sequence again.

Two Stage Operation / Thermostat Selection DIP Switch

The control can be utilized in two modes: SINGLE-STAGE thermostat or TWO-STAGE thermostat. The thermostat selection is made using a DIP switch and must be posi tioned for the particular application. DIP switch 1, labeled T”STAT HEAT STAGE is factory-set in the OFF position for use with a two-stage thermostat. Move the DIP switch to ON for use with a single stage thermostat. While in the single-stage thermostat mode, the burners will always fire on first-stage heat. The combustion air inducer will operate on low speed and indoor blower will operate on low heat speed. The unit will switch to second stage heat after a "recognition period". DIP switch 2, labeled SECOND STAGE DELAY, is factory set in the OFF position for a 7 minute recognition period. The switch can be moved to the ON position for a 12 minute recognition period, after which time the unit will switch to secondstage heat. While in the two-stage thermostat mode, the burners will fire on firststage heat. The combustion air inducer will operate on low speed and indoor blower will operate on low heat speed. The unit will switch to second-stage heat on call from the indoor thermostat. If there is a simultaneous call for first and second stage heat, the unit will fire an first stage heat and switch to second stage heat after 30 seconds of opera tion. See Sequence of Operation flow charts in the back of this manual for more detail.

TABLE 1

SureLight

PIN # Function

Control 5 Pin Terminal Designation

1 Ignitor

2 Combustion Air Inducer High Speed

3 Combustion Air Inducer Low Speed

4 Combustion Air Inducer Neutral

5 Ignitor Neutral

TABLE 2

SureLight

Control 12 Pin Terminal Designation

PIN # Function

1 Gas Valve Second Stage

2 Second Stage Prove Switch

3 Rollout Switch In

4 Ground

5 24V Hot

6 Primary Limit In

7 Gas Valve First Stage

8 Gas Valve Common

9 24V Neutral

10 Ground

11 Rollout Switch Out

12 First Stage Prove Switch

TABLE 3

Control 6 Pin Terminal Designation

SureLight

PIN # Function

1 Data Input From Motor

2 Common

3 Not Used

4 Data Output To Motor

5 5 Volt Bias Supply

6 Not Used

Page 6

HUM

LINE 1

7 SEGMENT LED

FLAME SENSE

DIAGNOSTIC

PUSH BUTTON

DIP SWITCHES

INTEGRATED CONTROL

ACC

HS/ CAI

INDOOR

BLOWER

CONNECTOR

NEUTRAL

OUTDOOR AIR

SENSOR

TERMINALS

DISCHARGE AIR

SENSOR

TERMINALS

TB83

icomfort

COMMUNICATING

OUTDOOR

EQUIPMENT

TB84

icomfort

COMMUNICATING

INDOOR

THERMOSTAT

I + I -CRI + I -

TB83 icomfort Communicating Outdoor Equipment

R = 24VAC I + = DATA HIGH CONNECTION I - = DATA LOW CONNECTION C = 24VAXC COMMON

TB84 icomfort Communicating Indoor Thermostat

R = 24VAC I + = DATA HIGH CONNECTION I - = DATA LOW CONNECTION C = 24VAXC COMMON

1/4” QUICK CONNECT TERMINALS

HUM = UNPOWERED NORMALLY OPEN (DRY) CONTACTS

XMFR = 120 VAC OUTPUT TO TRANSFORMER

LI = 120 VAC INPUT TO CONTROL

ACC = 120 VAC OUTPUT TO OPTIONAL ACCESSORY

NEUTRALS = 120 VAC NEUTRAL

W1 W2 GY2Y1

NON-COMMUNICATING

24V TERMINALS

12 PIN LOW

VOLTAGE

CONNECTOR

W915 Y1 TO Y2

2 STAGE COMPR

W951 R TO O HEAT PUMP

W914 R TO DS

DEHUM OR

RDHLODS

HARMONY

THERMOSTAT CONNECTIONS (TB1)

DS = DEHUMIDIFICATION SIGNAL W2 = HEAT DEMAND FROM 2ND STAGE T/STAT W1 = HEAT DEMAND FROM 1ST STAGE T/STAT

R = CLASS 2 VOLTAGE TO THERMOSTAT

G = MANUAL FAN FROM T'STAT

C = THERMOSTAT SIGNAL GROUND CONNECTED TO TRANSFORMER GRD (TR) & CHASIS GROUND (GRD)

Y1 = THERMOSTAT 1ST STAGE COOL SIGNAL

Y2 = THERMOSTAT 2ND STAGE COOL SIGNAL

O = THERMOSTAT SIGNAL TO HEAT PUMP

DH = DEHUMIDIFICATION OUTPUT COMMUNICATING

L = USE ONLY WITH A COMMUNICATING THERMOSTAT

AND A NON-COMMUNICATING OUTDOOR UNIT

REVERSING VALVE

THERMOSTAT ONLY

FIGURE 4

Page 7

THERMOSTAT SELECTION

TWO STAGE

THERMOSTAT

1−STAGE

THERMOSTAT

(TIMED STAGING)

−SEE SW #2

HEATING BLOWER−OFF DELAY

90 SECOND

HTG BLOWER

OFF DELAY

60 SECOND

HTG BLOWER

OFF DELAY

120 SECOND

HTG BLOWER

OFF DELAY

180 SECOND

HTG BLOWER

OFF DELAY

−BLOWER ON DELAY − 30 SEC. FIXED

HEATING MODE BLOWER SPEED

+ 24%

+ 18%

+ 12%

INCREASE AIR HTG CFM

+ 6%

FACTORY

DEFAULT

− 6%

− 12%

DECREASE AIR HTG CFM

− 18%

121415

INTEGRATED CONTROL CONFIGURATION GUIDE

2ND STAGE HEAT ON DELAY

INDOOR EQUIPMENT

HEAT PUMP LINK

(JUMPERS R to O)

7 MIN

UPSTAGE

DELAY

12 MIN

UPSTAGE

DELAY

FLAME

SENSE

123456

S4S3

911

OUTDOOR

SENSOR

DISCHARGE

AIR SENSOR

I+ I−

OUTDOOR EQUIPMENT

DIAGNOSTIC

PUSH BUTTON

RI+ I− CRI+ I− C

1−STG COMPRESSOR

W915

2 STAGE

COMPR

DO NOT CUT

2−STG COMPRESSOR

W915

2 STAGE

COMPR

CUT LINK

2−STAGE

COMPRESSOR LINK

(JUMPERS Y1 to Y2)

W915

CLG BLOWER SPEED ADJUSTMENT

HUM

W1W2 G Y2 Y1 C C DH L O DSR

HEAT PUMP UNIT

DEFAULT

ACC

W2GY2

ON−BOARD LINK

OPTION SELECTION

A/C UNIT

W951

HEAT PUMP

DO NOT CUT

W951

HEAT PUMP

CUT LINK

W951

+ 10%

− 10%

DIAGNOSTIC

LED

SureLight

HSI/CAI

IGN

CAI2

110

4 7

SELECTION

NO HARMONY ZONING

NO SIGNATURESTAT

W/ DS CONNECTION

DO NOT CUT

W914

DEHUM

HARMONY

HARMONY ZONING

SIGNATURESTAT W/

DS CONNECTION

CUT LINK

W914

DEHUM

HARMONY

DEHUMIDIFICATION−

HARMONY LINK

(JUMPERS R to DS)

CAI1

CUT FOR

OPTION

W915

2 STAGE

COMPR

W951 HEAT

PUMP

W914 DEHUM

HARMONY

W914

P79

CONTINUOUS FAN MODE BLOWER SPEED

NEUTRALS

MEDIUM−LOW

SPEED

(38%)

MEDIUM−HIGH

SPEED

(70%)

LOW

SPEED

(28%)

HIGH SPEED (100%)

COOLING MODE BLOWER SPEED

HIGH

SPEED

MEDIUM−HIGH

SPEED

MEDIUM−LOW

SPEED

LOW

SPEED

COOLING MODE BLOWER RAMPING

OPTION A

OFF−50%−82%−

100%−50%−OFF

OPTION B

OFF−82%−100%−OFF

OPTION C

OFF−100%−100%−OFF

OPTION D

OFF−100%−OFF

−CUT ON−BOARD LINK (SOLDER TRACE) COMPLETELY THROUGH

BOTH LAYERS ON THE CONTROL BOARD

−LINKS CUT IN ERROR −INSTALL A JUMPER ON THE APPROPRIATE

TERMINALS ON THE TERMINAL STRIP

−PROTECTIVE PLASTIC FILM ON DIP SWITCHES MAY BE

REMOVED FOR EASE IN SETTING OF DIP SW.

* FACTORY DEFAULT

FIGURE 5

Page 8

TABLE 4

Integrated Control Diagnostic Modes

Display Action (when button released)

No change (idle)* Remain in idle mode

Solid “E” Enter diagnostic recall mode

Solid “F” Enter flame signal mode

Solid “P” (variable speed only) Program unit capacity/size (Unit Code)

__ Two horizontal bars __

Soft disable

* No change implies the display will continue to show whatever is currently being displayed for normal operation (blinking decimal, active error code, heat state, etc..)

Diagnostic LED (Figure 4)

The seven-segment diagnostic LED displays operating status, target airflow, error codes and other information. The table beginning on Page 10 lists diagnostic LED codes.

Diagnostic Push Button (Figure 4)

The diagnostic push button is located adjacent to the seven-segment diagnostic LED. This button is used to en able the Error Code Recall “E” mode, the Flame Signal “F” mode and “P” the Program Unit Capacity/Size mode. Press the button and hold it to cycle through a menu of options. Every five seconds a new menu item will be displayed. When the button is released, the displayed item will be se lected. Once all items in the menu have been displayed, the menu resumes from the beginning until the button is re

Program Unit Capacity/Size Mode

After the “P” is selected (by releasing the push button) the integrated control will start flashing the “P” on display for 90 seconds. If push button is pressed again and held during that time, the control will start to display characters corre sponding to different variable speed furnace models for 3 seconds each. While the wanted character-model is dis played push button has to be released. Selected option will flash display for 10 seconds and during that time push but ton has to be pressed and held for 5 seconds. Once control accepts new setting it will store data in non-volatile memory and reset itself. If 10 seconds expires or push button is held less than 5 seconds, control will exit field test mode and go into idle without changing programming the unit size.

leased.

Error Code Recall Mode

Select ”E” from the menu to access the most recent 10 error codes. Select “c” from the Error Code Recall menu to clear all error codes. Button must be pressed a second time while “c” is flashing to confirm command to delete codes. Press the button until a solid “≡” is displayed to exit the Error Code Recall mode.

Flame Signal Mode

Select ”F” from the menu to access the flame signal mode. The integrated control will display the flame current on seven-segment LED in in micro amps (uA).

Soft Disable

Soft disabling is when thermostat finds a device on the BUS that it does not recognize and the thermostat sends a the device a message to be in soft disabling mode until proper ly configured. Two horizontal bars will display.

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

1- Confirm proper wiring between all devices (thermo stat, damper control module, indoor and outdoor).

2- Cycle power to the control that is displaying the soft disable code.

Flame signal mode is exited after any of the following:

 Power is reset  Pressing and holding push button until 3 horizontal

lines “≡” are displayed

 10 minutes after entering the flame sense mode.

3- Put the room thermostat through set up.

4- Go to setup / system devices / thermostat / edit / then push reset.

5- Go to setup / system devices / thermostat / edit / then push resetAll.

Page 9

TABLE 5

Integrated Diagnostic Codes/Status of Equipment

Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover

Idle mode (Decimal blinks at 1 Hertz -- 0.5 second ON, 0.5 second OFF).

Cubic feet per minute (cfm) setting for indoor blower (1 second ON, 0.5 second OFF) / cfm setting for current mode displayed.

Cooling stage (1 second ON, 0.5 second OFF) / 1 or 2 displayed / Pause / cfm setting displayed / Pause / Repeat codes).

Dehumidification mode (1 second ON) / 1 second OFF) / cfm setting dis played / Pause / Repeat Codes).

Heat pump stage (1 second ON, 0.5 second OFF) / % of input rate dis played / Pause / cfm setting / Pause / Repeat codes.

Gas Heat Stage (1 second ON, 0.5 second OFF) / 1 or 2 displayed / Pause / cfm setting displayed / Pause / Repeat codes. Blinking during ignition.

Defrost mode.

Discharge Air Temperature

E 105

Device communication problem - No other devices on RS BUS (Commu nication system).

E 110

Low line voltage. Line Voltage Low (Voltage lower than nameplate

E 111

Line voltage polarity reversed. Reverse line power voltage wiring. System resumes

E 112

Ground not detected System shuts down. Provide proper earth ground.

E 113

High line voltage. Line Voltage High (Voltage higher than nameplate

E 114

Line voltage frequency out-of-range. No 60 Hertz Power. Check voltage and line power

E 115

Low 24V - Control will restart if the error recovers. 24-Volt Power Low (Range is 18 to 30 volts). Check

E 116

High 24V. 24 Volt Power High (Range is 18 to 30 volts). Check

E 117

Poor ground detected (Warning only) Provide proper grounding for unit. Check for proper

E 120

Unresponsive device. Communication only. Usually caused by delay in outdoor unit responding

Equipment is unable to communicate. Indicates numerous message errors. In most cases errors are related to electrical noise. Make sure high voltage power is separated from RSBus. Check for miswired and/or loose connections between the stat, indoor unit and outdoor unit. Check for a high volt age source of noise close to the system. Fault clears after communication is restored.

rating). Check power line voltage and correct. Alarm clears 5 seconds after fault recovered.

normal operation 5 seconds after fault recovered.

System resumes normal operation 5 seconds after fault recovered.

rating). Provide power voltage within proper range. System resumes normal operation 5 seconds after fault recovered.

frequency. Correct voltage and frequency problems. System resumes normal operation 5 seconds after fault recovered.

and correct voltage. Check for additional power-rob bing equipment connected to system. May require installation of larger VA transformer to be installed in furnace / air handler. Clears after fault recovered.

and correct voltage. Check for proper line voltage (120V, 240V, etc.) to equipment. Clears when con trol senses proper voltage.

earth ground to the system. Warning only will clear 30 seconds after fault recovered.

to indoor unit poling. Recycle power. Check all wir ing connections. Cleared after unresponsive device responds to any inquiry.

Page 10

TABLE 5 Continued

Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover

E 124

Active communicating thermostat signal missing for more than 3 min utes.

E 125

Control failed self-check, internal error, failed hardware. Will restart if error recovers. Integrated control not communicating. Covers hardware errors (flame sense circuit faults, pin shorts, etc.).

E 126

Control internal communication problem. Hardware problem on the control. Cycle power on

E 131

Corrupted control parameters (Verify configuration of system). Communi cating only.

E 180

Outdoor air temperature sensor failure. Only shown if shorted or out-ofrange.

E 200

Hard lockout - Rollout circuit open or previously open. Correct cause of rollout trip, or replace flame rollout

E 201

Indoor blower communication failure - Unable to communicate with blow er motor.

E 202

Indoor blower motor mis-match - Indoor motor horsepower does not match unit capacity. See Page 71.

E 203

Appliance capacity / size is NOT programmed. Invalid unit codes refer to configuration flow chart. See Page 71.

E 204

Gas valve mis-wired. Check gas valve operation and wiring. Clears when

E 205

Gas valve control relay contact shorted. Check wiring on control and gas valve. If wiring is

Equipment lost communication with the thermostat. Check four wiring connections, ohm wires and cycle power at the thermostat. Alert stops all services and waits for heartbeat message from thermostat (sub net controller). Cleared after valid thermostat (sub net controller) message is received.

Hardware problem on the control. Cycle power on control. Replace if problem prevents service and is persistent. Critical alert. Cleared 300 seconds after fault recovered.

control. Replace if problem prevents service and is persistent. Cleared 300 seconds after fault recov ered.

Reconfigure the system. Replace control if heating or cooling is not available. Only applicable in the communicating mode, not in startup. Exit from Com missioning and Execute 'Set Factory Default mode'. Control will still operate on default parameter set tings.

Compare outdoor sensor resistance to temperature/ resistance charts in unit installation instructions. Replace sensor pack if necessary. At beginning of (any) configuration, furnace or air handler control will sense outdoor air and discharge air temperature sensor(s). If detected (reading in range), appropri ate feature will be set as 'installed' and that could be seen in 'About' screen. In normal operation after control recognizes sensors, alarm will be sent if valid temperature reading is lost. To get rid of set ting and alarm, redo configuration and make sure that temperature sensor is marked as 'not installed' in Indoor Unit 'About' screen. When Indoor unit con trol is replaced, thermostat will 'tell' new control if temperature sensor is in system or not. Clears 30 seconds after fault recovered.

switch. Test furnace operation. Cleared after fault recovered.

Indoor blower communication failure (including pow er outage). Lost communication with indoor blower motor. Possible causes: motor not powered, loose wiring. Problem may be on control or motor side. Cleared after fault recovered.

Incorrect appliance capacity code selected. Check for proper configuring under: Unit Size Codes for Furnace/Air Handler on configuration guide or in installation instructions. Cleared after the correct match is detected following a reset. (Remove ther mostat from system while applying power and re programming.)

No appliance capacity code selected. Check for proper configuring under: Unit Size Codes for Fur nace on configuration guide or in installation instruc tions. Critical Alert. Cleared after valid unit code is read following a reset. (Remove thermostat from system while applying power and reprogramming.)

repaired.

correct, replace control.

Page 11

TABLE 5 Continued

Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover

E 206

Gas valve second-stage relay failure Furnace will operate on 1st stage for remainder of

the heating demand. Will clear after fault recovered. If unable to operate 2nd stage, replace control.

E 207

Hot surface ignitor sensed open - Refer to troubleshooting. See Page 72. Measure resistance of hot surface ignitor. Replace if

open or not within specified range found in IOM. Resumes normal operation after fault is cleared.

E 223

Low pressure switch failed open. Check pressure (inches w.c.) of low pressure switch

closing on heat call. Measure operating pressure (inches w.c.). Inspect vent and combustion air in ducer for correct operation and restriction. Re sumes normal operation after fault is cleared

E 224

Low pressure switch failed closed - Refer to troubleshooting. See Page 72.

E 225

High pressure switch failed open - Refer to troubleshooting. See Page 72.

E 226

High pressure switch failed closed - Refer to troubleshooting. See Page 72.

E 227

Low pressure switch open during trial for ignition or run mode. Refer to troubleshooting. See Page 72.

E 228

Combustion air inducer calibration failure Unable to perform pressure switch calibration.

E 229

Ignition on High Fire - Information Only Code is displayed if 1) low pressure switch fails to

E 240

Low flame current - Run mode - Refer to troubleshooting. See Page 72. Check micro-amperes of flame sensor using control

E 241

Flame sensed out of sequence - Flame still present. Shut off gas. Check for gas valve leak. Replace, if

E 250

Limit switch circuit open - Refer to troubleshooting. See Page 72 Check for proper firing rate on furnace. Ensure

E 252

Discharge air temperature too high (gas heat only). Check temperature rise, air flow and input rate.

E 270

Soft lockout - Exceeded maximum number of retries. No flame current sensed.

Check operation of low pressure switch to see if it is stuck closed on heat call longer than 150 seconds. Measure operating pressure (inches w.c.). Inspect vent and combustion air inducer for correct opera tion and restriction. Resumes normal operation after fault is cleared.

Check pressure (inches w.c.) of high pressure switch closing on heat call. Measure operating pres sure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction. Re sumes normal operation after fault is cleared.

Check operation of high pressure switch closing on heat call. Measure operating pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction. Resumes normal opera tion after fault is cleared.

Check pressure (inches w.c.) of low pressure switch closing on heat call. Measure operating pressure (inches w.c.). Inspect vent and combustion air in ducer for correct operation and restriction. Re sumes normal operation after fault is cleared.

Check vent system and pressure switch wiring con nections. Resumes normal operation after fault is cleared.

close, then furnace will switch to high speed inducer to close both low and high pressure switches, then furnace lights on high fire, or 2) if continuous fan is active, furnace lights on high fire for 60 seconds to improve heat exchanger warm up time.

diagnostics or field-installed mode. Clean or replace sensor. Measure voltage of neutral to ground to ensure good unit ground. Alert clears after current heat call has been completed.

necessary. Alert clears when fault is recovered.

there is no blockage in heater. Check for proper air flow. If limit not closed within 3 minutes, unit will go into 1-hour soft lockout. Resumes normal operation after fault is cleared.

Cleared when heat call is finished.

Check for proper gas flow. Ensure that ignitor is lighting burner. Check flame sensor current. Clears when heat call finishes successfully.

Page 12

TABLE 5 Continued

Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover

E 271

Soft lockout - Exceeded maximum number of retries. Last retry failed due to the pressure switch opening.

E 272

Soft lockout - Exceeded maximum number of recycles. Last recycle due to the pressure switch opening.

E 273

Soft lockout - Exceeded maximum number of recycles. Last recycle due to flame failure.

E 274

Soft lockout - Exceeded maximum number of recycles. Last recycle failed due to the limit circuit opening or limit remained open longer than 3 minutes.

E 275

Soft lockout - Flame sensed out of sequence. Flame signal is gone. Shut off gas. Check for gas valve leak. 1-hour soft

E 276

Watchguard calibration failure. Unable to perform pressure switch calibration.

E 290

Ignitor circuit fault - Failed ignitor or triggering circuitry. Measure resistance of hot surface ignitor. Replace if

E 291

Heat air flow restricted below the minimum. Check for dirty filter and air flow restriction. Check

E 292

Indoor blower motor unable to start due to obstructed wheel, seized bearings.

E 294

Combustion air inducer over current. Check combustion blower bearings, wiring and

E 295

Indoor blower motor temperature is too high. Indoor blower motor over temperature (motor

E 310

Discharge error temperature sensor failure. Only shown if shorted or out of range.

E 311

Heat rate reduced to match indoor blower air flow. Warning Only. Furnace blower in cutback mode due

Check operation of low pressure switch to see if it is stuck closed on heat call. Check pressure (inches w.c.) of high pressure switch closing on heat call. Measure operating pressure (inches w.c.). Inspect vent and combustion air inducer for correct opera tion and restriction. Clears when heat call finishes successfully.

Check micro-amperes of flame sensor using control diagnostics or field-installed mode. Clean or replace sensor. Measure voltage of neutral to ground to ensure good unit ground. Clears when heat call finishes successfully.

Shut down system. 1-hour soft lockout. Check firing rate and air flow. Check for blockage. Clears when heat call finishes successfully.

lockout. Clears when flame has been proven stable.

Check vent system and pressure switch wiring con nections. 1-hour soft lockout. Clears when calibra tion has finished successfully.

open or not within specifications. 1-hour soft lock out. Clears when flame has been proven stable.

blower performance. 1-hour soft lockout. Cleared when heat call finishes successfully.

Indoor blower motor unable to start (seized bear ing, stuck wheel, etc.). Replace motor or wheel if assembly does not operate or meet performance standards. 1-hour soft lockout. Clears after circula tor successfully starts.

amps. Replace if does not operate or does not meet performance standards. Clears after inducer current is sensed to be in-range after the ignition following the soft lockout or reset.

tripped on internal protector). Check motor bearings and amps. Replace if necessary. Cleared after blower demand is satisfied.

Compare outdoor sensor resistance to temperature/ resistance charts in installation instructions. Re place sensor if necessary. Cleared in Communicat ing mode: 30 seconds after fault recovered. In NonCommunicating mode: Cleared after the current heat call is completed.

to restricted airflow. Reduce firing rate every 60 seconds to match available CFM. Check filter and duct system. To clear, replace filter if needed or re pair/add duct. 2-stage controls will reduce firing rate

stage. Clears when heat call finishes success

to 1 fully.

Page 13

TABLE 5 Continued

Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover

E 312

E 313

E 331

E 334

E 347

E 348

E 349

E 370

E 400

E 401

E 402

E 403

E 404

E 405

Restricted air flow in cooling or continuous fan mode is lower than cfm setting.

Indoor or outdoor unit capacity mismatch. Communication only. Incorrect indoor/outdoor capacity code selected.

Global network connection - Communication link problem. For Future Use.

Relay “Y1” stuck on interated control. Replace integrated control.

No 24 Volt output on Y1 of ”integrated control” with non communicating outdoor unit.

No 24 Volt output on Y2 of ”integrated control” with non?communicating outdoor unit.

No 24 Volts between R & O on ”integrated control” with non communi cating outdoor unit (Dual fuel module required for heat pump applica tion).

Interlock switch sensed open for 2 minutes. Control sees the loss of 24VAC for 2 minutes .Ter

LSOM - Compressor internal overload tripped. Thermostat demand Y1 is present; but, compressor

LSOM Compressor long run cycle or low system pressure. Compressor ran more than 18 hours to satisfy a

LSOM - Outdoor unit system pressure trip. Discharge or suction pressure out-of-limits, or com

LSOM - Compressor short-cycling. .(Running less than 4 minutes). Out door unit pressure trip

LSOM - Compressor rotor locked. Compressor short-cycling. (Running less than 4 minutes).

LSOM - Compressor open circuit. Compressor circuit open (due to power disconnec

Warning Only. Restricted airflow - Indoor blower is running at a reduced CFM (Cutback Mode - The variable speed motor has pre-set speed and torque limiters to protect the motor from damage caused by operating outside of design parameters (0 to 0.8” W.C.. total external static pressure). Check filter and duct system. To clear, replace filter if needed or repair/add duct. Cleared after the current service demand is satisfied.

Check for proper configuring in installation instruc tions. Alarm is just a warning. The system will oper ate, but might not meet efficiency and capacity pa rameters. Alarm will clear when commissioning is exited. Cleared after commissioning is complete.

Operation stopped. Y1 relay / Stage 1 failed. (Pilot relay contacts did not close or the relay coil did not energize; no input back to IFC chip). Critical Alert. Cleared after reset and Y1 input sensed.

Y2 relay / Stage 2 failed. (Pilot relay contacts did not close or the relay coil did not energize; no input back to IFC chip). Critical Alert. Cleared after reset and Y1 input sensed.

Configuration link R to O needs to be restored. Re place link or hard-wire. Applicable in non communi cating mode. Critical Alert.

minate all services and wait for interlock switch to close. The alarm will clear when 24VAC is continu ously sensed on DS terminal for a minimum of 10 seconds or on a power reset.

is not running. Check power to outdoor unit. Clears the error after current is sensed in both RUN and START sensors for at least 2 seconds, or after ser vice is removed, or after power reset.

single thermostat demand. Critical Alert. Clears the error after 30 consecutive normal run cycles or power reset. Also monitors low pressure switch trips.

pressor overloaded. Clears the error after 4 consec utive normal compressor run cycles.

Compressor runs less than 3 minutes to satisfy a thermostat demand. Clears the error after 4 consec utive normal run cycles or power reset.

Compressor rotor locked up due to run capacitor short, bearings are seized, excessive liquid refriger ant, etc. Clears the error after 4 consecutive normal run cycles or after power reset.

tion, open fuse, etc.) Clears the error after 1 normal compressor run cycle.

Page 14

TABLE 5 Continued

Code Diagnostic Codes/Status of Equipment Action Required to Clear and Recover

E 406

E 407

E 408

E 409

LSOM - Compressor open start circuit. Required amount of current is not passing through

Start current transformer. Clears the error after cur rent is sensed in START sensor, or after power re set.

LSOM - Compressor open run circuit. Required amount of current is not passing through

Run current transformer. Clears the error after cur rent is sensed in RUN sensor, or 1 normal compres sor run cycle, or after power reset.

LSOM - Compressor contactor is welded. Compressor runs continuously. Clears the error

after 1 normal compressor run cycle or after power reset.

LSOM - Compressor low voltage. Secondary voltage is below 18VAC. After 10 min

utes, operation is discontinued. Clears the code after voltage is higher than 20 VAC for 2 seconds or after power reset.

DIP Switch Settings

NOTE - All icomfortt settings are set at the icomfort Wi-Fi thermostat. See icomfortt installation instruction. In icom fortt communication system all DIP switch and clippable link settings are ignored. For conventional thermostats pro ceed with DIP switch and clippable link settings as outlined in the following.

Heating Operation DIP Switch Settings Switch 1 -- Thermostat Selection -- This unit may be

used with either a single-stage or two-stage thermostat. The thermostat selection is made using a DIP switch which must be properly positioned for the particular application. The DIP switch is factory-positioned for use with a twostage thermostat. If a single-stage thermostat is to be used, the DIP switch must be repositioned.

Select “OFF” for two-stage heating operation con

trolled by a two-stage heating thermostat (factory set ting);

b - Select “ON” for two-stage heating operation con

trolled by a single-stage heating thermostat. This set ting provides a timed delay before second-stage heat is initiated.

Switch 2 -- Second Stage Delay (Used with SingleStage Thermostat Only) -- This switch is used to deter

mine the second stage on delay when a single-stage ther mostat is being used. The switch is factory-set in the OFF position, which provides a 7-minute delay before secondstage heat is initiated. If the switch is toggled to the ON position, it will provide a 12-minute delay before secondstage heat is initiated. This switch is only activated when the thermostat selector jumper is positioned for SINGLEstage thermostat use.

Switches 3 and 4 -- Blower-Off Delay -- The blower-on delay of 30 seconds is not adjustable. The blower-off delay (time that the blower operates after the heating demand has been satisfied) can be adjusted by moving switches 3 and 4 on the integrated control. The unit is shipped from the factory with a blower-off delay of 90 seconds. The blower

off delay affects comfort and is adjustable to satisfy individ

ual applications. Adjust the blower off delay to achieve a supply air temperature between 90° and 110°F at the exact moment that the blower is de-energized. Longer off delay settings provide lower supply air temperatures; shorter set tings provide higher supply air temperatures.Table 6 pro vides the blower off timings that will result from different switch settings.

TABLE 6

Blower Off Delay Switch Settings

Blower Off Delay

(Seconds)

Switch 3 Switch 4

60 On Off

90 (Factory) Off Off

120 Off On 180 On On

Indoor Blower Operation DIP Switch Settings Switches 5 and 6 -- Cooling Mode Blower Speed -- The

unit is shipped from the factory with the dip switches posi tioned for high speed (4) indoor blower motor operation during the cooling mode. Table 7 provides the cooling mode blower speeds that will result from different switch settings. Switches 5 and 6 set the blower cfm for secondstage cool. The integrated control automatically ramps down to 70% of the second-stage cfm for first-stage cfm. Refer to tables for corresponding cfm values.

TABLE 7

Cooling Mode Blower Speeds

Speed

Switch 5 Switch 6

Low On On

Medium Low Off On

Medium High On Off

High (Factory) Off Off

Switches 7 and 8 -- Cooling Blower Speed Adjustment

-- The unit is shipped from the factory with the dip switches

positioned for NORMAL (no) adjustment. The dip switches may be positioned to adjust the blower speed by +10% or

Page 15

-10% to better suit the application. Table 8 below provides blower speed adjustments that will result from different switch settings. Refer to tables for corresponding cfm val ues.

TABLE 8

Cooling Blower Speed Adjustment

Adjustment

Switch 7 Switch 8

+10% (approx.) On Off Factory Default Off Off

-10% (approx.) Off On

Switches 9 and 10 -- Cooling Mode Blower Speed Ramping -- Blower speed ramping may be used to en

hance dehumidification performance. The switches are factory set at option A which has the greatest effect on dehumidification performance. Table 9 provides the cooling mode blower speed ramping options that will result from different switch settings. The cooling mode blower speed ramping options are detailed below.

NOTE - In heat pump mode blower operation defaults to option c.

TABLE 9

Cooling Mode Blower Speed Ramping

Ramping Option

Switch 9 Switch 10

A (Factory) Off Off

B Off On C On Off D On On

Ramping Option A (Factory Selection)

 Motor runs at 50% for 30 seconds.  Motor then runs at 82% for approximately 7-1/2 minu

tes.

 If demand has not been satisfied after 7-1/2 minutes,

motor runs at 100% until demand is satisfied.

 Once demand is met, motor runs at 50% for 30 sec

onds then ramps down to stop.

OFF

1/2 MIN 50% CFM

7 1/2 MIN 82% CFM

COMPRESSOR DEMAND

100% CFM

1/2 MIN 50% CFM

OFF

Ramping Option B

 Motor runs at 82% for approximately 7-1/2 minutes. If

demand has not been satisfied after 7-1/2 minutes, motor runs at 100% until demand is satisfied.

 Once demand is met, motor ramps down to stop.

OFF

7 1/2 MIN

82%CFM

COMPRESSOR DEMAND

100% CFM

OFF

Ramping Option C

 Motor runs at 100% until demand is satisfied.

 Once demand is met, motor runs at 100% for 45 sec

onds then ramps down to stop.

OFF

100% CFM

COMPRESSOR

DEMAND

100% CFM

45 SEC.

OFF

Ramping Option D

 Motor runs at 100% until demand is satisfied.

 Once demand is met, motor ramps down to stop.

100% CFM

COMPRESSOR

DEMAND

OFFOFF

Switches 11, 12 and 13 -- Heating Mode Blower Speed --

The switches are factory set to the OFF position which pro vides factory default heat speed. Refer to table 10 for switches 11, 12 and 13 that provided the corresponding in creases or decrease to both high and low heat demand.

TABLE 10

Heating Mode Blower Speeds

Heat Speed

Switch11Switch12Switch

Increase 24% On On On

Increase 18% On On Off

Increase 12% On Off On

Increase 6% On Off Off

Factory Default Off Off Off

Decrease 6% Off Off On

Decrease 12% Off On Off

Decrease18% Off On On

Switches 14 and 15 -- Continuous Blower Speed --

Table 11 provides continuous blower speed adjustments that will result from different switch settings.

TABLE 11

Continuous Blower Speed

Continuous

Blower Speed

Switch 14 Switch 15

28% of High Cool Speed Off On

38% of High Cool Speed

(Factory)

Off Off

70% of High Cool Speed On Off

100% of High Cool Speed On On

Page 16

BLOWER DATA

EL296DF045XV36B BLOWER PERFORMANCE (less lter)

BOTTOM RETURN AIR

0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range

HEATING

Heating Speed

DIP Switch

Settings

+24% 910 1150

+18% 855 1095

+12% 820 1040

+6% 770 990

Factory Default 745 935

–6% 700 880

–12% 665 820

–18% 635 755

Cooling Speed

DIP Switch

Settings

Low Medium-Low Medium-High

+ 640 755 850 975 895 1050 1210 1360

Factory Default 580 695 780 880 805 965 1105 1250

– 545 645 720 795 735 865 1000 1130

Cooling and heating speeds are based on a combination of DIP switch settings on the furnace control. Refer to Installation Instructions for specic DIP Switch Set-

NOTES - The effect of static pressure is included in air volumes shown.

First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position.

Continuous Fan Only speed is selectable at 28%, 38%, 70% and 100% of the selected second stage cooling speed - minimum 250 cfm.

First Stage Heating Speed - cfm Second Stage Heating Speed - cfm

COOLING

First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm

High Low Medium-Low Medium-High

First stage HEAT is approximately 91% of the same second stage HEAT.

Lennox Harmony III™ Zone Control Applications - Minimum blower speed is 250 cfm.

tings.

Factory default setting.

High

EL296DF045XV36B BLOWER MOTOR WATTS (COOLING)

Cooling Speed

DIP Switch

Settings

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

Motor Watts @ Various External Static Pressures - in. wg.

+ Setting

Low 28 44 60 77 93 11 2 128 144 158 59 77 97 121 138 160 182 197 216 241 256

Cooling

Speed

Med-low 47 67 88 105 121 138 161 179 201 131 154 177 202 228 250 277 299 320 344 370

Med-High 69 91 11 3 132 160 183 204 220 246 199 215 248 275 308 340 360 390 407 431 445

High 100 11 7 153 172 192 215 240 260 286 292 313 363 379 419 452 488 5 11 526 523 524

Factory Default

Low 17 34 52 65 82 97 121 132 148 61 79 98 125

Cooling

Speed

Med-low 35 50 70 85 105 125 140 155 175 99 11 5 148 167 188 211 236 256 279 303 317

Med-High 54 72 95 113 131 148 173 189 210 147 170 197 223 252 278 301 330 355 373 398

High 74 96 11 8 141 168 190 212 233 252 216 229 258 303 325 356 390 410 426 448 465

– Setting

Low 17 31 49 61 75 91 107 123 136 46 64 82 101 115 134 155 174 196 205 221

Cooling

Speed

Med-low 28 45 61 77 93 11 2 129 144 159 72 92 114 133 160 184 204 221 247 263 282

Med-High 40 57 77 93 11 2 130 148 165 186 11 2 130 161 183 205 226 252 272

High 57 76 97 119 136 156 179 195 214 155 174 207 235 265 292 3 11 343 370 386 414

141 164 185 201 219 246 259

294 319 341

Page 17

BLOWER DATA

EL296DF070XV48B BLOWER PERFORMANCE (less lter)

BOTTOM RETURN AIR

0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range

HEATING

Heating Speed

DIP Switch

Settings

+24% 1085 1635

+18% 1030 1525

+12% 950 1450

+6% 910 1365

Factory Default 850 1310

–6% 790 1225

–12% 740 1135

–18% 680 1060

Cooling Speed

DIP Switch

Settings

Low Medium-Low Medium-High

+ 740 915 1055 1255 1110 1340 1575 1800

Factory Default 660 820 940 1120 995 1230 1420 1650

– 575 735 850 995 880 1085 1290 1460

Cooling and heating speeds are based on a combination of DIP switch settings on the furnace control. Refer to Installation Instructions for specic DIP Switch Set-

NOTES - The effect of static pressure is included in air volumes shown.

First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position.

Continuous Fan Only speed is selectable at 28%, 38%, 70% and 100% of the selected second stage cooling speed - minimum 380 cfm.

First Stage Heating Speed - cfm Second Stage Heating Speed - cfm

COOLING

First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm

High Low Medium-Low Medium-High

First stage HEAT is approximately 91% of the same second stage HEAT.

Lennox Harmony III™ Zone Control Applications - Minimum blower speed is 380 cfm.

tings.

Factory default setting.

High

EL296DF070XV48B BLOWER MOTOR WATTS (COOLING)

Cooling Speed

DIP Switch

Settings

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

Motor Watts @ Various External Static Pressures - in. wg.

+ Setting

Low 68 88 109 132 154 178 199 213 238 144 169 208 244 270 310 343 378 401 432 457

Cooling

Speed

Med-low 93 120 147 172 198 220 254 274 304 257 276 326 370 398 437 470 492 531 558 598

Med-High 120 152 180 220 254 281 318 344 380 390 428 472 526 574 611 659 706 745 788 820

High 214 237 284 324 352 390 424 456 474 627 604 663 721 775 825 869 908 915 881 864

Factory Default

Low 35 54 74 92 109 129 147 163 191 104 137 162 189

Cooling

Speed

Med-low 75 100 115 140 165 190 210 230 255 188 203 250 297 327 374 399 432 454 486 513

Med-High 99 129 159 179 209 236 270 293 329 304 340 376 418 450 495 533 567 613 637 674

High 157 184 232 264 285 335 365 406 419 454 469 537 589 634 669 724 770 818 833 840

– Setting

Low 27 49 63 73 98 11 6 135 155 168 86 111 135 162 186 206 236 257 283 306 339

Cooling

Speed

Med-low 67 87 109 132 154 177 199 212 238 129 156 187 226 258 288 325 353 385 409 441

Med-High 82 105 127 153 176 196 223 243 269 226 244 290 335 364 402 435 465

High 107 141 164 195 224 263 282 321 347 329 375 403 444 481 526 570 612 656 680 718

219 254 278 312 341 369 400

485 516 556

Page 18

BLOWER DATA

EL296DF090XV60C BLOWER PERFORMANCE (less lter)

BOTTOM RETURN AIR

0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range

HEATING

Heating Speed

DIP Switch

Settings

+24% 1425 1895

+18% 1355 1825

+12% 1280 1740

+6% 1215 1660

Factory Default 1160 1575

–6% 1055 1455

–12% 1010 1365

–18% 950 1265

Cooling Speed

DIP Switch

Settings

Low Medium-Low Medium-High

+ 1115 1265 1400 1600 1600 1750 1970 2130

Factory Default 1005 1150 1275 1450 1450 1630 1810 1975

– 890 1065 1150 1270 1270 1450 1645 1810

Cooling and heating speeds are based on a combination of DIP switch settings on the furnace control. Refer to Installation Instructions for specic DIP Switch Set-

NOTES - The effect of static pressure is included in air volumes shown.

First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position.

Continuous Fan Only speed is selectable at 28%, 38%, 70% and 100% of the selected second stage cooling speed - minimum 450 cfm.

First Stage Heating Speed - cfm Second Stage Heating Speed - cfm

COOLING

First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm

High Low Medium-Low Medium-High

First stage HEAT is approximately 91% of the same second stage HEAT.

Lennox Harmony III™ Zone Control Applications - Minimum blower speed is 450 cfm.

tings.

Factory default setting.

High

EL296DF090XV60C BLOWER MOTOR WATTS (COOLING)

Cooling Speed

DIP Switch

Settings

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

Motor Watts @ Various External Static Pressures - in. wg.

+ Setting

Low 79 108 144 162 207 242 262 293 323 275 299 366 399 449 483 532 584 605 644 680

Cooling

Speed

Med-low 120 156 187 233 261 279 329 368 401 387 409 471 521 562 606 650 688 716 762 800

Med-High 155 202 235 293 317 369 407 453 502 547 577 622 667 744 795 835 872 910 950 963

High 268 299 366 399 449 483 532 584 605 780 775 8 11 898 942 994 1048 1071 1082 1080 1073

Factory Default

Low 56 86 111 140 170 200 232 259 282 186 219 270 308

Cooling

Speed

Med-low 93 11 8 152 195 223 254 283 306 344 278 304 365 420 450 510 544 592 640 665 698

Med-High 123 161 201 228 260 310 341 381 416 446 475 528 582 616 662 686 747 780 823 855

High 182 219 270 308 361 390 431 489 517 576 603 654 704 756 809 871 902 939 972 975

– Setting

Low 48 69 101 120 152 175 201 218 249 11 8 155 181 232 259 299 340 376 402 438 476

Cooling

Speed

Med-low 65 94 123 150 185 220 250 278 296 177 205 267 304 353 390 430 486 515 563 587

Med-High 93 118 152 195 223 254 283 306 344 301 322 392 439 468 531 568 599

High 116 155 181 232 259 299 340 376 402 446 475 528 582 616 662 686 747 780 823 855

361 390 431 489 517 555 590

647 678 721

Page 19

BLOWER DATA

EL296DF110XV60C BLOWER PERFORMANCE (less lter)

BOTTOM RETURN AIR

0 through 0.8 in. w.g. (Heating) and 0 through 1.0 in. w.g. (Cooling) External Static Pressure Range

HEATING

Heating Speed

DIP Switch

Settings

+24% 1535 2015

+18% 1445 1935

+12% 1370 1855

+6% 1300 1760

Factory Default 1220 1645

–6% 1135 1545

–12% 1070 1420

–18% 1000 1335

Cooling Speed

DIP Switch

Settings

Low Medium-Low Medium-High

+ 1095 1265 1395 1585 1585 1790 1990 2180

Factory Default 965 1130 1285 1440 1440 1630 1845 2005

– 860 1035 1130 1275 1275 1475 1655 1845

Cooling and heating speeds are based on a combination of DIP switch settings on the furnace control. Refer to Installation Instructions for specic DIP Switch Set-

NOTES - The effect of static pressure is included in air volumes shown.

First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position.

Continuous Fan Only speed is selectable at 28%, 38%, 70% and 100% of the selected second stage cooling speed - minimum 450 cfm.

First Stage Heating Speed - cfm Second Stage Heating Speed - cfm

COOLING

First Stage Cooling Speed - cfm Second Stage Cooling Speed - cfm

High Low Medium-Low Medium-High

First stage HEAT is approximately 91% of the same second stage HEAT.

Lennox Harmony III™ Zone Control Applications - Minimum blower speed is 450 cfm.

tings.

Factory default setting.

High

EL296DF110XV60C BLOWER MOTOR WATTS (COOLING)

Cooling Speed

DIP Switch

Settings

First Stage Second Stage

0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0

Motor Watts @ Various External Static Pressures - in. wg.

+ Setting

Low 71 99 147 166 202 240 271 302 337 248 280 333 374 429 469 511 548 594 619 677

Cooling

Speed

Med-low 127 159 198 225 256 301 325 365 390 409 427 496 531 587 632 665 721 742 781 805

Med-High 162 204 242 287 316 371 408 446 487 563 589 651 703 755 808 860 888 932 970 1007

High 243 280 333 374 429 469 511 548 594 866 850 915 963 1020 1056 1091 1127 1141 1136 1131

Factory Default

Low 57 88 117 140 165 196 232 259 283 167 214 244 291

Cooling

Speed

Med-low 77 11 2 147 172 209 250 283 317 345 275 321 348 418 447 505 546 597 632 668 716

Med-High 122 154 199 230 268 300 331 373 411 461 493 547 572 628 666 703 745 777 819 860

High 167 214 244 291 331 380 405 467 497 601 626 688 730 787 823 880 924 963 994 1011

– Setting

Low 44 67 99 11 5 144 167 197 215 245 126 165 201 232 262 305 334 373 417 451 479

Cooling

Speed

Med-low 66 97 123 153 186 216 247 275 303 187 219 272 308 360 391 432 479 514 559 588

Med-High 77 112 147 172 209 250 283 317 345 308 341 390 430 490 528 569 617

High 127 165 201 232 262 305 334 373 417 461 493 547 572 628 666 703 745 777 819 860

331 380 405 467 497 539 583

640 691 724

Page 20

On-Board Links

Note: In icomfortt systems with a conventional outdoor unit (non-communicating), the on-board clippable links must be set to properly configure the system.

damage. Refer to table 12 for operation sequence in ap plications including EL296DFV, a thermostat which fea tures humidity control and a single-speed outdoor unit. Table 13 gives the operation sequence in applications with a two-speed outdoor unit.

On-Board Link W951 Heat Pump (R to O)

WARNING

Carefully review all configuration information pro vided. Failure to properly set DIP switches, jumpers and on-board links can result in improper operation!

On-board link W951 is a clippable connection between ter minals R and O on the integrated control. W951 must be cut when the furnace is installed in applications which include a heat pump unit and a thermostat which features dual fuel use. If the link is left intact, terminal “O” will remain ener

On-Board Link W914 Dehum or Harmony (R to DS)

On-board link W914, is a clippable connection between ter minals R and DS on the integrated control. W914 must be cut when the furnace is installed with either the Harmony III zone control or a thermostat which features humidity control. If the link is left intact the PMW signal from the Har mony III control will be blocked and also lead to control

gized eliminating the HEAT MODE in the heat pump.

On-Board Link W915 2 Stage Compr (Y1 to Y2)

On-board link W915 is a clippable connection between ter minals Y1 and Y2 on the integrated control. W915 must be cut if two-stage cooling will be used. If the Y1 to Y2 link is not cut the outdoor unit will operate in second-stage cool ing only.

TABLE 12

OPERATING SEQUENCE

EL296DFV, Non-Communicating Thermostat with Humidity Control Feature and Single-Speed Outdoor Unit

OPERATING SEQUENCE

System

Condition

NO CALL FOR DEHUMIDIFICATION

Normal Operation 1 On On On Acceptable

BASIC MODE (only active on a Y1 thermostat demand)

Normal Operation 1 On On On Acceptable

Dehumidification

Call

PRECISION MODE (operates independent of a Y1 thermostat demand)

Normal Operation 1 On On On Acceptable

Dehumidification

call

Dehumidification

call ONLY

Step

Jumpers at indoor unit with a single stage outdoor unit With Condensing unit - Cut W914 (R to DS) on SureLight With Heat Pump - Cut W914 (R to DS) & W951 (R to O) on SureLight

Thermostat Demand Relative Humidity

Y1 O G

2 On On On Demand 0 VAC High 70%*

2 On On On Demand

1 On On On Demand

SYSTEM DEMAND SYSTEM RESPONSE

Status D

VAC

Compressor

High 100%

High 70%*

control

Blower

(COOL)

control

CFM

Comments

Compressor and indoor blower follow thermostat demand

ComfortSense® 7000 thermostat energizes Y1 and de-energizes D on a call for de-humidification

Dehumidification mode begins when humidity is greater than set point

ComfortSense thermostat maintain room humidity setpoint by allowing the room space to maintain a cooler room thermostat setpoint**

7000

will try to

Use Dave Lennox ComfortSense® 7000 thermostat Y2081 4 heat / 2 cool for this application *Dehumidification blower speed is 70% of COOL speed for all units . **In Precision mode, ComfortSense

7000 thermostat will maintain room temperature up to 2 °F (1.2°C) cooler than room setting.

Page 21

TABLE 13

OPERATING SEQUENCE

EL296DFV, Non-Communicating Thermostat with Humidity Control Feature and Two-Speed Outdoor Unit

OPERATING

SEQUENCE

SYSTEM DEMAND SYSTEM RESPONSE

Thermostat Demand Relative Humidity

System

Condition

Ste

Y1 Y2 O G

W1W

Status D

NO CALL FOR DEHUMIDIFICATION

Normal Opera

tion - Y1

Normal Opera

tion - Y2

1 On On On Acceptable

2 On On On On Acceptable

VAC

ROOM THERMOSTAT CALLS FOR FIRST STAGE COOLING

BASIC MODE (only active on a Y1 thermostat demand)

Normal Opera

tion

Dehumidification

Call

1 On On On Acceptable

2 On On On On Demand

VAC

PRECISION MODE (operates independent of a Y1 thermostat demand)

Normal Opera

tion

Dehumidification

call

Dehumidification

call ONLY

1 On On On Acceptable

2 On On On On Demand

1 On On On On Demand

VAC

ROOM THERMOSTAT CALLS FOR FIRST AND SECOND STAGE COOLING

BASIC MODE (only active on a Y1 thermostat demand)

Normal Opera

tion

Dehumidification

Call

1 On On On On Acceptable

2 On On On On Demand

VAC

PRECISION MODE (operates independent of a Y1 thermostat demand)

Normal Opera

tion

Dehumidification

call

1 On On On Acceptable

2 On On On On Demand

VAC

Compressor

Low 70%*

High 100%

Low 70%*

High 70%**

Low 70%*

High 70%**

High 100%

High 70%**

Low 70%*

High 70%**

Blower

CFM

(COOL)

Comments

Compressor and indoor blower follow thermostat demand

ComfortSense

7000 thermostat energizes Y2 and de-energizes D on a call for de-humidification

Dehumidification mode begins when humidity is greater than set point

ComfortSense® 7000 thermostat will try to maintain room humidity setpoint by allowing the room space to maintain a cooler room thermostat setpoint***

ComfortSense® 7000 thermostat energizes Y2 and de-energizes D on a call for de-humidification

Dehumidification mode begins when humidity is greater than set point

Dehumidification

call ONLY

1 On On On On Demand

VAC

Jumpers at indoor unit with a two stage outdoor unit Cut factory jumper from Y1 to Y2 or cut W915 (Y1 to Y2) With Condensing unit - Cut W914 (R to DS) on SureLight

control

With Heat Pump - Cut W914 (R to DS) & W951 (R to O) on SureLight

Use Dave Lennox ComfortSense® 7000 thermostat Y2081 4 heat / 2 cool for this application. *Normal operation first stage cooling blower speed is 70% COOL speed. **Dehumidification blower speed is, reduced to 70% of COOL. ***In Precision mode, ComfortSense

7000 thermostat will maintain room temperature up to 2 °F (1.2°C) cooler than room setting.

Page 22

High 70%**

control

ComfortSense® 7000 thermostat will try to maintain room humidity setpoint by allowing the room space to maintain a cooler room thermostat setpoint***

B- Indoor Blower Motor

Power Choke

(4 and 5 Ton Only)

To Remove Blower From Unit: Remove access panels,

Control box, Bolts and Wiring Jackplugs.

Blower Motor

(B3)

Then Slide Out Front of Unit.

FIGURE 6

WARNING

During blower operation, the ECM motor emits ener gy that may interfere with pacemaker operation. In terference is reduced by both the sheet metal cabinet and distance.

The motor communicates with the integrated control via a 2-way serial connection. The motor receives all necessary functional parameters from the integrated control and does not rely on a factory program like traditional variable speed motors. EL296DFV units use a three‐phase, electronically controlled D.C. brushless motor (controller converts single phase a.c. to three phase D.C.), with a permanent‐magnet‐ type rotor (figure 7). Because this motor has a permanent magnet rotor it does not need brushes like conventional D.C. motors. The stator windings are split into three poles which are electri cally connected to the controller. This arrangement allows motor windings to turn on and off in sequence by the con troller.

IMPORTANT

Earlier ECM motors used on other Lennox furnace models are not interchangeable with motors used on the EL296 furnace line.

A solid‐state controller is permanently attached to the motor. The controller is primarily an A.C. to D.C. con verter. Converted D.C. power is used to drive the motor. The controller contains a microprocessor which moni tors varying conditions inside the motor (such as motor workload).

BLOWER MOTOR COMPONENTS

STATOR

(WINDINGS)

BEARING

ROTOR

FIGURE 7

The controller uses sensing devices to sense what position the rotor is in at any given time. By sensing the position of the rotor and then switching the motor windings on and off in se quence, the rotor shaft turns the blower.

All EL296DFV blower motors use single phase power. An external run capacitor is not used. The motor uses permanently lubricated ball‐type bearings.

Internal Operation

The motor is controlled via serial communication between the integrated control on the furnace and the controller at tached to the motor shell. The messages sent back and forth between the two controls serve to communicate rota tional direction, demand, motor size, current draw, torque, and rpm, among other variables.

Motor rpm is continually adjusted internally to maintain constant static pressure against the blower wheel. The control ler monitors the static work load on the motor and motor amp‐ draw to determine the amount of rpm adjustment. Blower rpm may be adjusted any amount in order to maintain a constant cfm as shown in Blower Ratings Tables. The cfm remains rel atively stable over a broad range of static pressure. Since the blower constantly adjusts rpm to maintain a specified cfm, mo tor rpm is not rated. Hence, the terms “cool speed”, “heat speed ” or “speed tap” in this manual, on the unit wiring dia gram and on blower B3, refer to blower cfm regardless of mo tor rpm.

Initial Power Up

When line voltage is applied to B3, there will be a large inrush of power lasting less than 1/4 second. This inrush charges a bank of DC filter capacitors inside the controller. If the discon nect switch is bounced when the disconnect is closed, the dis connect contacts may become welded. Try not to bounce the disconnect switch when applying power to the unit.

Page 23

+ 53 hidden pages

Lennox EL296DF045XV36B, EL296DF110XV60C, EL296DF070XV48B, EL296DF090XV60C Unit Information

Specifications and Main Features

Frequently Asked Questions

User Manual

SPECIFICATIONS

Integrated Control Diagnostic Modes

DIP Switch Settings

BLOWER DATA