Lennox SLP98DF090XV60C, SLP98DF110XV60C, SLP98DF090XV36C, SLP98DF090XV48C, SLP98DF070XV36B Handbook

Corp. 1030-L7

Service Literature

Revised 05-2016

SLP98DFV SERIES UNITS

SLP98DFV series units are high-efficiency downflow gas furnaces equipped with variable capacity gas valve, vari able speed combustion air inducer and variable speed in door blower motor. All models are designed for direct vent (dual pipe) venting system only. SLP98DFV units are avail able in heating capacities from 66,000 to 132,000 Btuh (19.3 to 38.6 kW) and cooling applications from 2 to 5 tons (7.0 kW to 17.5 kW). Refer to Engineering Handbook for proper sizing.

Units are factory-equipped for use with natural gas. Kits are

available for conversion to LPG operation. SLP98DFV mod

els include a SureLight

that can be used with Lennox icomfort Wi-Fi

part of a communicating comfort system. All SLP98DFV

units meet the California Nitrogen Oxides (NO

and California Seasonal Efficiency requirements.

variable capacity integrated control

thermostat as

) Standards

SLP98DFV

All specifications in this manual are subject to change. Pro cedures outlined in this manual are presented as recom mendations 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.

TABLE OF CONTENTS

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

Optional Accessories Page 3......................

Blower Data Page 4..............................

I Unit Components Page 8........................

II icomfort Wi-Fi

III Placement and Installation Page 35..............

IV Start Up Page 53..............................

V Heating System Service Checks Page 54..........

VI Typical Operating Characteristics Page 57........

VII Maintenance Page 57..........................

VIII Wiring and Sequence of Operation Page 60.....

IX Field Wiring Page 68...........................

Thermostat Page 33..............

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.

WARNING

Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at discon nect switch(es). Unit may have multiple power supplies.

CAUTION

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

Page 1

SPECIFICATIONS

Gas Heating Performance

Maximum Input - Btuh 66,000 88,000 88,000

Temperature rise range - °F 50 - 80 60 - 90 50 - 80

Gas Manifold Pressure (in. w.g.)

Nat. Gas / LPG/Propane

Minimum Input - Btuh 23,000 31,000 31,000

Temperature rise range - °F 35 - 65 35 - 65 35 - 65

Gas Manifold Pressure (in. w.g.)

Nat. Gas / LPG/Propane

High static - in. w.g. 0.8 0.8 0.8

Connections in.

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

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

Condensate Drain Trap (PVC pipe) - i.d. 3/4 3/4 3/4

with furnished 90° street elbow 3/4 slip x 3/4 Mipt 3/4 slip x 3/4 Mipt 3/4 slip x 3/4 Mipt

with eld supplied (PVC coupling) - o.d. 3/4 slip x 3/4 MPT 3/4 slip x 3/4 MPT 3/4 slip x 3/4 MPT

Indoor

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

Blower

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

Air Volume Range - cfm 410 - 1365 488 - 1385 545 - 1745

Electrical Data Voltage (Maximum Amps) 120 volts - 60 hertz - 1 phase

Blower motor full load amps 7.7 7.7 10.1

Maximum overcurrent protection 15 15 15

Shipping Data lbs. - 1 package 140 155 165

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

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

furnaces.

Model No. SLP98DF070XV36B SLP98DF090XV36C SLP98DF090XV48C

AFUE 97.5% 97.5% 97.5%

Output - Btuh 64,000 84,000 85,000

3.5 / 10.0 3.5 / 10.0 3.5 / 10.0

Output - Btuh 22,000 30,000 30,000

0.5 / 1.5 0.5 / 1.5 0.5 / 1.5

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

SPECIFICATIONS

Gas Heating Performance

Maximum Input - Btuh 88,000 110,000

Temperature rise range - °F 50 - 80 50 - 80

Gas Manifold Pressure (in. w.g.)

Nat. Gas / LPG/Propane

Minimum Input - Btuh 31,000 39,000

Temperature rise range - °F 35 - 65 35 - 65

Gas Manifold Pressure (in. w.g.)

Nat. Gas / LPG/Propane

High static - in. w.g. 0.8 0.8

Connections in.

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

Gas pipe size IPS 1/2 1/2

Condensate Drain Trap (PVC pipe) - i.d. 3/4 3/4

with furnished 90° street elbow 3/4 slip x 3/4 Mipt 3/4 slip x 3/4 Mipt

with eld supplied (PVC coupling) - o.d. 3/4 slip x 3/4 MPT 3/4 slip x 3/4 MPT

Indoor

Wheel nominal diameter x width - in. 11 x 11 11 x 11

Blower

Tons of add-on cooling 3.5 - 5 3.5 - 5

Air Volume Range - cfm 467 - 2130 575 - 2180

Electrical Data Voltage (Maximum Amps) 120 volts - 60 hertz - 1 phase

Blower motor full load amps 12.8 12.8

Maximum overcurrent protection 20 20

Shipping Data lbs. - 1 package 165 174

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

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

furnaces.

Model No. SLP98DF090XV60C SLP98DF110XV60C

AFUE 97.5% 97.5%

Output - Btuh 85,000 107,000

3.5 / 10.0 3.5 / 10.0

Output - Btuh 30,000 38,000

0.5 / 1.5 0.5 / 1.5

Motor output - hp 1 1

Page 2

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

Crawl Space Vent Drain Kit USA (Canada) 51W18 (15Z70) 51W18 (15Z70)

CONTROLS

iComfort Wi-Fi® Thermostat 10F81 10F81

Remote Outdoor Air Sensor (for dual fuel and Humiditrol®) X2658 X2658

Discharge Air Temperature Sensor 88K38 88K38

ComfortSense

Remote Outdoor Temperature Sensor

(for dual fuel and Humiditrol)

DOWNFLOW FILTER KITS

Downow Air Filter and Rack Kit 51W07 51W08

NIGHT SERVICE KITS

Night Service Kit 10U37 10U37

Universal Service Kit - Switches 89W20 89W20

TERMINATION KITS

Direct Vent Applications Only. See Installation Instructions for specic venting information.

Termination Kits Concentric US - 2 in. 71M80 69M29

Roof Termination Flashing Kit (2 ashings) 3 in. 44J41 44J41

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 conven-

tional outdoor unit.

Optional for service diagnostics.

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

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

NOTE - Termination Kits 44W92, 44W93, 30G28, 51W12, 81J20 and Crawl Space Vent Drain Kit 15Z70 are certied to ULC S636 standard for use in Canada only.

7000 Thermostat Y0349 Y0349

X2658 X2658

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

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

US - 2 in. 22G44 - - -

3 in. 44J40 44J40

Canada - 2 in. 30G28 - - -

3 in. 81J20 81J20

Roof 2 in. 15F75 15F75

Wall Ring Kit 2 in. 15F74 15F74

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.

GAS HEAT ACCESSORIES

Input High Altitude

Pressure Switch Kit

7501 - 10,000 ft. 0 - 10,000 ft. 0 - 10,000 ft.

All Models 93W75 65W77 70W87

Natural Gas to

LPG/Propane Kit

Page 3

LPG/Propane to

Natural Gas Kit

BLOWER DATA

SLP98DF070V36B BLOWER PERFORMANCE (less lter)

HEATING BLOWER PERFORMANCE

Heating Adjust CFM Selections

35% 40% 50% 60% 70% 80% 90% 100%

Increase (+15%) Heat CFM 495 543 639 735 830 926 1022 1118

Increase (+7.5%) Heat CFM 473 516 604 691 778 866 953 1041

Default Heat CFM 450 489 568 647 726 805 884 963

Decrease (-7.5% ) Heat CFM 430 467 540 614 687 761 834 908

Decrease (-15% ) Heat CFM 410 444 512 580 649 717 785 853

COOLING BLOWER PERFORMANCE

Cooling Adjust CFM

Selections

First Stage Cool Speed - cfm Second Stage Cool Speed - cfm

Low Medium-

Low

Increase (+10%) Cool CFM 625 785 890 995 910 1075 1230 1365

Default Cool CFM 575 710 830 890 845 960 1125 1265

Decrease (-10%) Cool CFM 520 615 710 820 755 885 985 1150

Heating Input Range and Blower Volume - CFM

Blower Speed Selections

Medium

High

(Default)

Low Medium-

Low

Medium

High

(Default)

SLP98DF090V36C BLOWER PERFORMANCE (less lter)

HEATING BLOWER PERFORMANCE

Heating Adjust CFM Selections

35% 40% 50% 60% 70% 80% 90% 100%

Heating Input Range and Blower Volume - CFM

Increase (+15%) Heat CFM 710 756 848 940 1033 1125 1217 1309

Increase (+7.5%) Heat CFM 670 713 799 885 971 1057 1143 1230

Default Heat CFM 629 669 749 829 910 990 1070 1150

Decrease (-7.5% ) Heat CFM 559 599 681 763 845 927 1009 1091

Decrease (-15% ) Heat CFM 488 530 614 697 781 865 948 1032

COOLING BLOWER PERFORMANCE

Cooling Adjust CFM

Selections

First Stage Cool Speed - cfm Second Stage Cool Speed - cfm

Low Medium-

Low

Medium

High

Blower Speed Selections

High

Low Medium-

(Default)

Low

Medium

High

(Default)

Increase (+10%) Cool CFM 610 770 900 1035 920 1080 1215 1385

Default Cool CFM 545 690 805 920 835 1000 1135 1255

Decrease (-10%) Cool CFM 465 620 720 810 750 890 1025 1145

The effect of static pressure is included in air volumes shown. The following control congurations are available. See Installation Instructions for details and DIP switch settings.

Heat Modes Available (Heating Blower Performance Table):

Single stage thermostat:

- 35%, 70%, 100% input (three-stage) with time delays in-between Two-stage thermostat:

- Variable Rate Capacity Mode - furnace automatically adjusts ring rate based on rst- and second-stage cycle times

- W1 demand at 70% input, W2 demand at 100% input. No delay between stages icomfort Touch™ Communicating Thermostat:

- Variable Rate Capacity Mode - furnace automatically adjusts ring rate based on rst- and second-stage cycle times

- 35%, 60%, 80%, 100% (four-stage) with time delays in-between

Cool Mode Available (Cooling Blower Performance table):

First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position. Continuous Fan speeds are approximately 28%, 38%, 70% and 100% (DIP switch selectable) of the same second-stage COOL speed position minimum 250 cfm.

Lennox Harmony III™ Zoning System Applications - Minimum blower speed is 250 cfm.

Page 4

BLOWER DATA

SLP98DF090V48C BLOWER PERFORMANCE (less lter)

HEATING BLOWER PERFORMANCE

Heating Adjust CFM Selections

35% 40% 50% 60% 70% 80% 90% 100%

Increase (+15%) Heat CFM 723 790 925 1060 1195 1329 1464 1599

Increase (+7.5%) Heat CFM 690 752 878 1004 1129 1255 1381 1507

Default Heat CFM 656 714 831 948 1064 1181 1297 1414

Decrease (-7.5% ) Heat CFM 601 654 761 867 974 1081 1188 1295

Decrease (-15% ) Heat CFM 545 593 690 787 884 981 1078 1175

COOLING BLOWER PERFORMANCE

Cooling Adjust CFM

Selections

First Stage Cool Speed - cfm Second Stage Cool Speed - cfm

Low Medium-

Low

Increase (+10%) Cool CFM 775 940 1100 1255 1120 1340 1535 1745

Default Cool CFM 690 875 975 1135 1000 1220 1425 1625

Decrease (-10%) Cool CFM 635 755 915 1025 920 1100 1270 1470

Heating Input Range and Blower Volume - CFM

Blower Speed Selections

Medium

High

(Default)

Low Medium-

Low

Medium

High

(Default)

SLP98DF090V60C BLOWER PERFORMANCE (less lter)

HEATING BLOWER PERFORMANCE

Heating Adjust CFM Selections

35% 40% 50% 60% 70% 80% 90% 100%

Heating Input Range and Blower Volume - CFM

Increase (+15%) Heat CFM 653 728 877 1027 1176 1326 1475 1625

Increase (+7.5%) Heat CFM 603 673 813 953 1092 1232 1372 1512

Default Heat CFM 553 618 748 878 1009 1139 1269 1399

Decrease (-7.5% ) Heat CFM 510 570 690 811 931 1051 1171 1292

Decrease (-15% ) Heat CFM 467 522 632 743 853 963 1074 1184

COOLING BLOWER PERFORMANCE

Cooling Adjust CFM

Selections

First Stage Cool Speed - cfm Second Stage Cool Speed - cfm

Low Medium-

Low

Medium

High

Blower Speed Selections

High

Low Medium-

(Default)

Low

Medium

High

(Default)

Increase (+10%) Cool CFM 1110 1265 1395 1600 1600 1750 1965 2130

Default Cool CFM 1000 1145 1275 1445 1445 1625 1805 1975

Decrease (-10%) Cool CFM 885 1060 1145 1265 1265 1445 1645 1805

The effect of static pressure is included in air volumes shown. The following control congurations are available. See Installation Instructions for details and DIP switch settings.

Heat Modes Available (Heating Blower Performance Table):

Single stage thermostat:

- 35%, 70%, 100% input (three-stage) with time delays in-between Two-stage thermostat:

- Variable Rate Capacity Mode - furnace automatically adjusts ring rate based on rst- and second-stage cycle times

- W1 demand at 70% input, W2 demand at 100% input. No delay between stages icomfort Touch™ Communicating Thermostat:

- Variable Rate Capacity Mode - furnace automatically adjusts ring rate based on rst- and second-stage cycle times

- 35%, 60%, 80%, 100% (four-stage) with time delays in-between

Cool Mode Available (Cooling Blower Performance table):

Lennox Harmony III™ Zoning System Applications - Minimum blower speed is 380 cfm (SLP98DF090V48C) and 450 cfm (SLP98DF090V60C).

Page 5

BLOWER DATA

SLP98DF110V60C BLOWER PERFORMANCE (less lter)

HEATING BLOWER PERFORMANCE

Heating Adjust CFM Selections

35% 40% 50% 60% 70% 80% 90% 100%

Increase (+15%) Heat CFM 811 906 1096 1286 1475 1665 1855 2045

Increase (+7.5%) Heat CFM 744 835 1017 1199 1380 1562 1744 1926

Default Heat CFM 677 764 938 1112 1285 1459 1633 1807

Decrease (-7.5% ) Heat CFM 626 707 869 1031 1193 1355 1517 1679

Decrease (-15% ) Heat CFM 575 650 800 950 1101 1251 1401 1551

COOLING BLOWER PERFORMANCE

Cooling Adjust CFM

Selections

First Stage Cool Speed - cfm Second Stage Cool Speed - cfm

Low Medium-

Low

Increase (+10%) Cool CFM 1090 1260 1395 1580 1580 1790 1990 2180

Default Cool CFM 965 1125 1285 1440 1440 1625 1845 2000

Decrease (-10%) Cool CFM 860 1030 1125 1270 1270 1470 1655 1845

The effect of static pressure is included in air volumes shown. The following control congurations are available. See Installation Instructions for details and DIP switch settings.

Heat Modes Available (Heating Blower Performance Table):

Single stage thermostat:

- 35%, 70%, 100% input (three-stage) with time delays in-between Two-stage thermostat:

- Variable Rate Capacity Mode - furnace automatically adjusts ring rate based on rst- and second-stage cycle times

- W1 demand at 70% input, W2 demand at 100% input. No delay between stages icomfort Touch™ Communicating Thermostat:

- Variable Rate Capacity Mode - furnace automatically adjusts ring rate based on rst- and second-stage cycle times

- 35%, 60%, 80%, 100% (four-stage) with time delays in-between

Cool Mode Available (Cooling Blower Performance table):

Lennox Harmony III™ Zoning System Applications - Minimum blower speed is 450 cfm.

Heating Input Range and Blower Volume - CFM

Blower Speed Selections

Medium

High

(Default)

Low Medium-

Low

Medium

High

(Default)

Page 6

CONTROL BOX

(includes variable capacity

integrated control,

transformer, circuit breaker

and door switch)

BLOWER

ACCESS

PANEL

SLP98DFV PARTS ARRANGEMENT

BLOWER ASSEMBLY

(Variable Speed Blower

Motor Is Hidden)

BAG ASSEMBLY

ACCESS PANEL

COMBUSTION AIR INDUCER

GAS VALVE

PRIMARY LIMIT

BURNER BOX ASSEMBLY

FIGURE 1

Page 7

I-UNIT COMPONENTS

SLP98DFV unit components are shown in figure 1. The gas valve, combustion air inducer and burners can be accessed by removing the access panel. Electrical components are in the control box (figure 2) found in the blower compartment.

CAUTION

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

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 shut down. The breaker can be manually reset by pressing the button on the face. See figure 3.

CIRCUIT BREAKER CB8

PRESS TO RESET

FIGURE 3

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 mod els are rated 40VA with a 120V primary and a 24V secon dary.

2. Interlock Switch (S51)

An interlock switch rated 14A at 125VAC is wired in series with line voltage. When the inner blower access panel is re moved the unit will shut down.

CONTROL BOX SLP98DFV

SURELIGHT®

DOOR

INTERLOCK

SWITCH

INTEGRATED

CONTROL

CIRCUIT BREAKER

FIGURE 2

TRANSFORMER

WARNING

Shock hazard. Disconnect power before servicing.

Integrated control is not field repairable. If control is inoperable, simply replace entire control.

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

4. Integrated Control (A92)

SLP98DFV units are equipped with the Lennox SureLight variable-capacity integrated control. This control can be used with the icomfort Wi-Fi municating comfort system. The control can also operate with a conventional single or two-stage thermostat. The system consists of an ignition / blower control (figures 4 and

5) with control pin designations in tables 1, 2 and ignitor. The control provides gas ignition, safety checks and indoor blower control with variable capacity rate gas heating. The furnace combustion air inducer, gas valve and indoor blow er 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-segment LED display, indicating furnace status (including indoor blower) and error codes. The LED flashes in single digits. For exam ple using table 14 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 120 volt accessory terminals (used for a humidifier and electronic air cleaner) rated at (1) one amp each.

thermostat as part of a com

Page 8

Electronic Ignition

At the beginning of the heat cycle the SureLight

integrated control monitors the low fire combustion air inducer pres sure switch. The control will not begin the heating cycle if the low fire pressure switch is closed (by-passed). Likewise the control will not begin the high fire heating cycle if the high fire pressure switch is closed, and will remain in low fire heat. However, if the high fire pressure switch closes during the low fire heat pre-purge, the control will allow high fire heat. Once the low fire pressure switch is determined to be open, the combustion air inducer is energized on ignition speed. When the differential in the pressure switch is great enough, the pressure switch closes and a 15-second pre-purge be gins. If the switch is not proven within 2-1/2 minutes, the in ducer is de-energized and the control will initiate vent cal ibration. If the vent calibration is unsuccessful the control goes into a 5 minute delay. The control will attempt vent cal ibration 3 more times before going into a 1 hour soft lockout. After the 15 second pre-purge period the SureLight ignitor warms up for 20 seconds. The gas valve then opens for a 4-second trial for ignition. The ignitor stays energized dur ing this trial until flame is sensed. If ignition is not proven during the 4-second trial for ignition, 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.

Thermostat Selection Modes

See table 3 for DIP switch settings

The control can be made to operate in three modes: vari able capacity, three-stage timed or two-stage. The variable capacity and two-stage modes are only operational with a two-stage thermostat. The thermostat selection is made us ing DIP switches one and / or two (figure 4) and must be positioned for the particular application.

Three- Stage Timed Operation

Using a single-stage thermostat the system will operate in a three stage timed mode. Upon a call for heat and a success ful ignition, the combustion air inducer will operate at 35% and the indoor blower will adjust to the appropriate cfm. Af ter a field selectable 7 or 12 minute delay period, the induc er RPM will increase and the unit will operate at 70%. The indoor blower will adjust to the appropriate cfm. After a fac tory set non-adjustable 10 minute delay expires the furnace will increase rate to 100%. The indoor blower will adjust to the appropriate cfm.

Two-Stage Operation

The system will also operate in conventional two-stage mode. While in two-stage mode, the furnace will fire on low fire (70% rate). The combustion air inducer will operate at 70% and the indoor blower will adjust to the appropriate cfm. The unit will switch to high fire on a W2 call from the thermostat. After a 30 second recognition period (during which the integrated control will receive a continuous W2 call) expires the furnace will increase to 100% rate. The in ducer will increase to 100% speed and the indoor blower will adjust to appropriate cfm. If there is a simultaneous call for first and second stage heat, the unit will fire on first stage heat and switch to second stage heat after 30 seconds of operation.

TABLE 1

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

Variable Capacity

Using a two-stage thermostat the system will operate in a variable capacity sequence mode. In this mode, the control will vary the firing rate anywhere between 35% and 100% of full capacity. The indoor blower will be automatically ad justed accordingly to provide the appropriate airflow at any rate. On the initial call for low fire, the furnace will operate at 35% and will remain there until the heat call is satisfied or a call for high fire is initiated. If there is a call for high fire the rate will increase by 10% if the current rate is above 60%. However if the current rate is below 60% the rate will in crease to 70%. After this initial rate increase to 70% capac ity, the furnace will increase rate by 10% every 5 minutes while a high fire heat call is present. If the high fire heat call is satisfied but the low fire heat call is still present, the furnace will remain at the current firing rate until the demand is satis fied or another call for high fire is initiated.

Page 9

TABLE 2

SureLight Control 12 Pin Terminal Designation

PIN # Function

1 Not used

2 High Fire Pressure Switch

3 Rollout In

4 Ground

5 24V Hot

6 Primary Limit In

7 Gas Valve

8 Gas Valve Common

9 24V Neutral

10 Ground

11 Primary Limit Switch Out

12 Low Fire Pressure Switch

COMBUSTION

AIR INDUCER

CONNECTOR

FLAME SENSE

DIAGNOSTIC

PUSH BUTTON

DIP SWITCHES

NEUTRAL

TERMINALS

IGNITOR

CONNECTOR

LINE VOLTAGE

HUM

EAC

TERMINALS

ON-BOARD

LINKS

OUTDOOR AIR

SENSOR

TERMINALS

DISCHARGE AIR

SENSOR

FACTORY TEST

HEADER PINS.

FACTORY USE ONLY.

TB83 OUTDOOR

TB84 INDOOR

TERMINALS

RS-BUS LINK (TB82, future use)

I+ = DATA HIGH CONNECTION I - = DATA LOW CONNECTION

RS-BUS OUTDOOR (TB83)

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

RS-BUS INDOOR (TB84)

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

7-SEGMENT

DIAGNOSTIC LED

INDOOR

BLOWER

CONNECTOR

W915 Y1 TO Y2

W951 R TO O

W915

W951

W914

W914 R TO DS

L - use only with

communicating T'stat and

non-communicating outdoor

unit.

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

REVERSING VALVE

1/4” QUICK CONNECT TERMINALS

HUM = 120 VAC OUTPUT TO HUMIDIFIER XMFR = 120 VAC OUTPUT TO TRANSFORMER

LI = 120 VAC INPUT TO CONTROL

CIRC = 120 VAC OUTPUT TO CIRCULATING BLOWER

EAC = 120 VAC OUTPUT TO ELECTRICAL AIR CLEANER

NEUTRALS = 120 VAC NEUTRAL

H = 24V HUMIDIFIER OUTPUT. DO NOT CONNECT TO COM

FORTSENSE

L = USE ONLY WITH A COMMUNICATING THERMOSTAT AND

A NON-COMMUNICATING OUTDOOR UNIT

DH = DEHUMIDIFICATION OUTPUT

COMMUNICATING THERMOSTAT ONLY

FIGURE 4

Page 10

THERMOSTAT

SLP98DFV INTEGRATED CONTROL CONFIGURATION GUIDE

FIGURE 5

Page 11

Thermostat Selection Switch Settings

TABLE 3

Operation

Variable Capacity Heat

Thermostat Switch 1 Switch 2 Switch 3

Two-Stage Off On Off

(35% to 100%)

Three-Stage Heat (35%, 70%, 100%)

Single-Stage On Off 2nd stage delay

OFF = 7 minutes

ON = 12 minutes

3rd stage delay

10 minutes fixed

Two-Stage Heat (W1 70%, W2 100%) Two-Stage Off Off Off

NOTE - When the SLP98DFV is used with an icomfort

communicating thermostat, all indoor blower

Wi-Fi speed selections and DIP switch settings are made by the communicating thermostat.

Heating Operation DIP Switch Settings -- Figure 4

Switch 1 -- Thermostat Selection -- This unit may be used

with either a single-stage or two-stage thermostat. The ther mostat 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 two-stage thermo stat. If a single-stage thermostat is to be used, the DIP switch must be repositioned. See table 3.

NOTE - All DIP switches are factory shipped in the “OFF” position.

Switch 2 -- Operating Mode with Two-Stage Thermostat

-- If a two-stage thermostat is used, the furnace can operate

in either variable-capacity or conventional two-stage mode. When variable-capacity mode is selected, the firing rate of the unit is varied to maximize comfort. Conventional twostage mode is the factory default setting. See table 3.

Switch 3 -- Second-Stage Heat On Delay -- If a singlestage thermostat is used, the integrated control can be used to energize second-stage heat after either 7 minutes or 12 minutes of first-stage heat operation. See table 3.

Switches 4 and 5 -- Blower-Off Delay -- The blower-on delay of 45 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 4 and 5 on the integrated control. The unit is shipped from the facto ry with a blower-off delay of 90 seconds. The blower off delay affects comfort and is adjustable to satisfy individual applications. Adjust the blower off delay to achieve a supply air temperature between 90° and 110°F at the exact mo ment that the blower is de-energized. Longer off delay set tings provide lower supply air temperatures; shorter set tings provide higher supply air temperatures. Table 4 pro vides the blower off timings that will result from different switch settings.

Blower Off Delay Switch Settings

Blower Off Delay

(Seconds)

60 Off On

90 (factory) Off Off

120 On Off 180 On On

Indoor Blower Operation DIP Switch Settings Switches 6 and 7 -- Continuous Indoor Fan Operation -Blower Speed - Switches 6 and 7 are used to select blower

motor speeds during continuous indoor blower operation. The unit is shipped from the factory with DIP switches posi tioned for medium low (2) speed during continuous indoor blower operation. The table below provides the continuous blower speeds that will result from various switch settings. Refer to blower tables at the front of this manual for corre sponding cfm values.

Continuous Indoor Fan

Speed

1 - Low (28%) Off On

2 - Medium Low

(38%)

(Factory)

3 - Medium High

(70%)

4 - High (100%) On On

Switches 8 and 9 -- Cooling Mode Blower Speed --

Switches 8 and 9 are used to select cooling blower motor speed. The unit is shipped from the factory with the DIP switches positioned for high speed (4) indoor blower motor operation during the cooling mode. The table below pro vides the cooling mode blower speeds that will result from different switch settings. Refer to blower tables at the front of this manual for corresponding cfm values.

Cooling Mode Blower Speeds

Speed

1 - Low On On

2 - Medium Low Off On

3 - Medium High On Off

4 - High (Factory) Off Off

TABLE 4

Switch 4 Switch 5

TABLE 5

Switch 6 Switch 7

Off Off

On Off

TABLE 6

Switch 8 Switch 9

Page 12

Switches 10 and 11 -- Cooling Mode Blower Speed Ad justment -- Switches 10 and 11 are used to select blower

speed adjustment settings. The unit is shipped from the fac tory with the DIP switches positioned for NORMAL (no) ad justment. The DIP switches may be positioned to adjust the blower speed by +10% or -10% to better suit the application. The table below provides blower speed adjustments that will result from different switch settings. Refer to blower tables at the front of this manual for corresponding cfm val ues. With switches 10 and 11 set to ON, motor will bypass ramping profiles and all delays and immediately upon a call for cool, run at COOLING speed selected. LED will continue to operate as normal. This mode is used to check motor op eration.

TABLE 7

Blower Speed Adjustment

Adjustment

Switch 10 Switch 11

+10% (approx.) On Off

NORMAL (Factory) Off Off

-10% (approx.) Off On MOTOR TEST On On

Ramping Option A (Factory Selection)

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

utes.

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

motor runs at 100% until demand is satisfied.

D 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

COOLING 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, mo tor runs at 100% until demand is satisfied.

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

OFF

7 1/2 MIN

82%CFM

COOLING DEMAND

100% CFM

OFF

Switches 12 and 13 -- Cooling Mode Blower Speed Ramping -- Switches 12 and 13 are used to select cooling

mode blower speed ramping options. Blower speed ramp ing may be used to enhance dehumidification performance. The switches are factory set at option A which has the great est effect on blower motor performance. Table 8 provides the cooling mode blower speed ramping options that will re sult from different switch settings. The cooling mode blower speed ramping options are detailed below.

TABLE 8

Cooling Mode Blower Speed Ramping

Ramping Option

Switch 12 Switch 13

A (Factory) Off Off

B On Off C Off On D On On

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

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

COOLING DEMAND

OFFOFF

Page 13

Low Heat Blower Speeds

TABLE 9

Thermostat

Demand

Blower

Speed

Adjust

ments

DIP SWITCH SETTINGS

14 15 16

+15% On Off On

Low Heat (R to W1)

+7.5% On Off Off

Normal Off Off Off

-7.5% On On Off

-15% On On On

Switches 14 through19 -- Heating Mode Blower Speed

-- Switches 14 through 19 are used to select heating mode

blower motor speeds. These switches are factory set at the OFF position which provides 100 % of normal speed during HIGH HEAT demand, 70% of normal speed during MIDRANGE HEAT demand and 35% of normal speed during LOW HEAT demand. Switches 14, 15 and 16 are used to adjust the LOW FIRE blower motor speed. Switches 17, 18 and 19 are used to adjust the HIGH FIRE blower motor speed. Figure 6 and tables 9 and 10 provides the heating mode blower speeds that will result from different switch settings. Figure 6 indicates the effect the DIP switch set tings (tables 20 &21 above) have upon the heating airflow at various furnace firing rates. Refer to blower tables at the front of this manual for corre sponding cfm values.

Thermostat

Demand

High Heat

(R to

W1 & W2)

High Heat Blower Speeds

TABLE 10

Blower

Speed

Adjust

ments

DIP SWITCH SETTINGS

17 18 19

+15% On Off On

+7.5% On Off Off

Normal

Off Off Off

-7.5% On On Off

-15% On On On

Increasing

Airflow

+15% +7.5%

Nominal

-7.5%

-15%

Airflow Determination

S Identify blower speed adjustment points at low and high fire S Airflow will lie on straight line between these two points and will fall within

the shaded area as shown EXAMPLE -7.5% at low fire +7.5% at high fire

Low Fire

Dip Switches

14, 15, 16

35%

50%

60%

70%

RATE (%)

FIGURE 6

80%

Dip Switches

90%

High Fire

17, 18, 19

+15%

+7.5%

Nominal

-7.5%

-15%

100%

Page 14

On-Board Link W914 DS to R (Figure 4)

On-board link W914, is a clippable connection between ter minals DS and R on the integrated control. W914 must be cut when the furnace is installed with either the Harmony IIIt zone control or a thermostat which features humidity control. If the link is left intact the PWM signal from the Har mony III control will be blocked and also lead to control dam age. Refer to table 15 for operation sequence in applica tions including SLP98DFV, a thermostat which features hu midity control and a single-speed outdoor unit. Table 16 gives the operation sequence in applications with a twospeed outdoor unit.

On-Board Link W951 R to O (Figure 4)

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 gized eliminating the HEAT MODE in the heat pump.

On-Board Link W915 Y1 to Y2 (Figure 4)

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 link is not cut the outdoor unit will operate in second-stage cooling only.

Diagnostic LED (Figure 4)

The seven-segment diagnostic LED displays operating sta tus, target airflow, error codes and other information. Table 14 lists diagnostic LED codes.

Diagnostic Push Button (Figure 4)

The diagnostic push button is located adjacent to the sevensegment diagnostic LED. This button is used to enable the Error Code Recall mode and the Field Test 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 selected. Once all items in the menu have been displayed, the menu re sumes from the beginning until the button is released.

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.

Field Test Mode

Use the diagnostic push button to scroll through the menu as described above. Release the button when the LED flashes “-” to select the Field Test mode.

While in the Field Test mode the technician can: D Initiate furnace ignition and move to and hold low-fire

rate by applying a R to W1 jumper.

D Initiate furnace ignition sequence and move to and hold

high-fire rate by applying a jumper from R to W1 and W2.

D Initiate furnace ignition sequence and move to and hold

mid-fire rate by applying a jumper to R and W2.

D Apply then remove the jumper from R to W1 and W2 to

change the firing rate from low fire to mid fire and high fire.

D A vent calibration sequence can be initiated even if a

thermostat signal is not present. Press and hold the push button until a solid “C” is displayed. Release the button and calibration will begin. The furnace will per form the high-fire and low-fire pressure switch calibra tions and display “CAL”. After calibration, the LED will return to the flashing “-” display.

During Field Test mode operation, all safety switches are still in the circuit (they are not by-passed) and indoor blower performance and timings will match DIP switch selections. Current furnace firing rate, indoor blower CFM and flame signal will be displayed. To exit the Field Test mode, press and hold the button. The menu will resume from the begin ning. A The integrated control will automatically exit the Field Test mode after 45 minutes of operation.

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 properly configured. Two horizontal bars will display.

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

o, cycle the main power to exit the Field Test mode.

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.

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 15

TABLE 11

Idle Menu Options

These options are displayed on the menu when the button is pressed during normal operation

DISPLAY

No change (idle) remain in idle mode

Solid “E” enter diagnostic mode

Solid “-” enter field test mode

NOTE - No change implies the display will continue to show whatever is currently being displayed for normal operation

Field Test Menu Options

These options are displayed when the button is used in Field Test Mode

DISPLAY

No change (blinking “-”) remain in field test mode

Solid “-” exit field test mode

Solid “c” start pressure switch calibration

Field Test Menu Options

These options are displayed when the button is used in diagnostic recall mode

ACTION (when button released)

TABLE 12

ACTION (when button released)

TABLE 13

DISPLAY

No change (displaying error history) remain in diagnostic recall mode

Solid (3 horizontal bars) exit diagnostic recall mode

Solid “c” clear error history

Once the button is released to clear the error history a blinking “c” will be shown on the display for up to 10 seconds. During this time the user must press and release the button one additional time to confirm the action of deleting the error history. Once the error history is deleted it cannot be recovered.

ACTION (when button released)

Page 16

Configuring Unit Size Codes

Power-Up - Number displayed represents by integrated control unit size code (furnace model

and capacity). If three horizontal bars are displayed followed by continuous E203, furnace control does not recognize unit size code. Configure per the following:

To enter Field Test Mode: push and hold button next to 7-segment LED display until solid dash symbol appears. Release button.

If alarm is present, furnace control will display error code. If alarm is not present solid dash starts blinking on 7-segment LED display.

Yes

−

Furnace control in IDLE mode

No heating, cooling or indoor fan

operation)

Turn room thermostat to OFF

UNIT SIZE

CODE

FURNACE MODEL

SLP98DFV070-36B

SLP98DFV-090-36C

SLP98DFV-090-48C

SLP98DFV-090-60C

SLP98DFV-110-60C

Push and hold button until the solid P symbol is displayed on the 7-segment LED. Release button. This mode allows the user to select a unit size code number that matches the furnace model size and capacity.

IMPORTANT: Field replacement controls may need to be manually configured to validate furnace unit size code.

Solid P starts blinking on 7-Segment LED

Push and hold button. Integrated control will display unit size code number for each furnace model for five seconds.

When the correct unit size code is displayed, release button. Selected code will flash for 10-second period. During that period, hold push button until code stops blinking (disappear for 2 seconds). Integrated control will store code in memory and will automatically exit Field Test Mode and reset. (If second period expires or push button is held less than five seconds, control will automatically exit Field Test Mode and go into IDLE mode without storing unit size code. If this happens, programming function must be repeated).

−

. If

−

Verify that the selected unit size code is correct and stored in non-volatile memory by cycling the 24 volt power to the furnace control. (At 24 volt power-up of the furnace control, the 7-segment LED will display a unit size code three horizontal bars display, board does not recognize unit size code function must be repeated)

. Programming

FINISHED

Page 17

TABLE 14

LED 7 Segment Status / Error Code

Press the diagnostic push button and hold it to cycle through a menu of options. Every five seconds a new menu item will be displayed. Release the button when the desired mode is displayed. When a solid ”P” is displayed, the furnace capacity/ size is programmed. When the solid “E” is displayed, the control enters the Error Code Recall mode. Error Code Recall mode menu options: No change (display ing error history) remains in Error Code Recall mode; solid “b” exits Error Code Recall mode; and solid “c” clears the error history. Must press button while flashing “c” is displayed to clear error codes. When the solid “-” is displayed, the control enters the Field Test mode. Field Test mode menu options: Solid “C” starts pressure switch calibration; blinking “-” exits Field Test mode.

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 displayed / Pause / Repeat Codes).

Variable Capacity Heat (1 second ON, 0.5 second OFF) / % of input rate displayed / Pause/ cfm setting / Pause/ Repeat codes.

Heat Stage (1 second ON, 0.5 second OFF) / 1 or 2 displayed / Pause / cfm set ting displayed / Pause / Repeat codes.

Defrost mode.

Discharge air temperature

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 properly configured. Two horizontal bars will display.

E 105

Device communication problem - No other devices on BUS (Communication system).

E 110

Low line voltage. Line Voltage low (Voltage lower than nameplate rating)

E 113

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

E 114

Line voltage frequency out-of-range. No 60 hertz power (Check voltage and frequency).

E 115

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

E 120

Unresponsive device. Usually caused by delay in outdoor unit responding to

E 124

Active communicating thermostat signal missing for more than 3 minutes. Equipment lost communication with the thermostat. Check

E 125

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

E 126

Failed internal control communication between microcontrollers. Hardware problem on the control board. Cycle power on

E 131

Corrupted control parameters (Verify configuration of system). Reconfigure the system. Replace board if service (heating

E 180

Outdoor air sensor failure - NO error if disconnected. Only shown if shorted or out-of-range.

E 200

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

E 201

Indoor blower communication failure - Unable to communicate with blower motor. Indoor blower communication failure including power

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

Equipment is unable to communicate. Check for mis wire and loose connections and check for a high voltage source of noise close to the system. (welder etc.).

Check voltage.

indoor unit poling recycle power, check wiring.

connections and cycle power on the thermostat.

Hardware problem on the control board. Cycle power on control. Replace if problem prevents service and is persistent.

control. Replace if problem prevents service and is persistent.

/cooling) is unavailable.

Compare outdoor sensor resistance to temperature resistance charts in installation instructions. Replace if necessary.

switch and test furnace operation.

outage.

Page 18

Integrated Control Diagnostic Codes (continued)

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

E 202

E 203

E 204

E 205

E 207

E 223

E 224

E 225

E 226

E 227

E 228

E 240

E 241

E 250

E 252

E 270

E 271

E 272

E 273

E 274

E 275

E 276

E 290

E 291

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

Appliance capacity / size is NOT programmed. Invalid unit codes refer to configuration flow chart in installation instructions.

Gas valve mis-wired. Check operation of gas valve.

Gas valve control relay contact shorted. Check operation of gas valve.

Hot surface ignitor sensed open - Refer to troubleshooting in installation instruction.

Low pressure switch failed open - Refer to troubleshooting in installation instruction.

Low pressure switch failed closed - Refer to troubleshooting in installation instruction.

High pressure switch failed open - Refer to troubleshooting in installation instruction.

High pressure switch failed closed - Refer to troubleshooting in installation instruction.

Low pressure switch open during trial for ignition or run mode. Refer to trouble shooting in installation instruction.

Unable to perform successful pressure switch calibration. Retry after 300 seconds. Error counter cleared when exit

Low flame current - Run mode - Refer to troubleshooting in installation instruction.

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

Limit switch circuit open - Refer to troubleshooting in installation instruction. Check why limit is tripping, overfired, low air flow.

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

Soft lockout - Exceeded maximum number of retries. No flame current sensed. Check for gas flow, ignitor lighting burner, flame sensor

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

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

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

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

Soft lockout - Flame sensed out of sequence from code 241 fault. Flame signal is gone.

Soft lockout - Exceeded maximum number of calibration retries. See E 228.

Ignitor circuit fault - Failed ignitor or triggering circuitry. See E 207.

Restricted air flow - Cubic feet per minute is lower than what is needed for minimum firing rate.

Incorrect furnace size code selected. Check unit size codes on configuration guide or in installation instructions.

No furnace size code selected. Check unit size codes on configuration guide or in installation instructions.

Measure resistance of Hot Surface Ignitor, replace if open or not within specification.

Check inches of water column pressure during operation of low pressure switch on heat call, measure inches of water column of operating pressure, inspect vent and combustion air inducer for correct operation and restric tion.

Check low pressure switch for closed contacts, measure inches of water column of operating pressure, inspect vent and combustion air inducer for correct operation and re striction.

Check inches of water column pressure of high pressure switch on heat call, measure inches of water column of operating pressure, inspect vent and combustion air inducer for correct operation and restriction.

Check high pressure switch for closed contacts, measure inches of water column of operating pressure, inspect vent and combustion air inducer for correct operation and restriction.

ing lockout, unable to perform pressure switch calibration. Check vent system and pressure switch wiring connections.

Check micro amperes of flame sensor, clean or replace sensor. Measure voltage of neutral to ground for good unit ground.

current.

See E 223.

See E 223 and E 225.

See E 240.

See E 250.

See E 241.

Check for dirty filter, unit air flow restriction, blower performance.

Page 19

Integrated Control Diagnostic Codes (continued)

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

E 292

E 294

E 295

E 310

E 311

E 312

E 313

E 331

E 347

E 348

E 349

E 401

E 402

E 403

E 404

E 405

E 406

E 407

E 408

E 409

Indoor blower motor unable to start - Seized bearings, stuck wheel, etc. Indoor blower motor unable to start (seized

Combustion air inducer motor amp draw is too high. Check combustion blower bearings, wiring , amperes,

bearing, stuck wheel, etc), replace motor or wheel if assembly does not operate or meet performance.

replace if it does not operate or meet performance.

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

tripped on internal protector), Check motor bear ings, amperes. Replace if necessary.

Discharge error sensor failure - No error if disconnected. Only shown if shorted or out-of-range.

Heat rate reduced to match indoor blower air flow. Replace filter or repair duct restriction.

Discharge air temperature(DATS) out of range, code is activated during ”Field test mode”.

Furnace blower in cutback mode due to restricted airflow. Check filter and ductwork. To clear replace filter if needed or repair/ add ductwork.

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

Restricted airflow - Indoor blower is running at a reduced cubic feet per minute (Cutback Mode) The variable speed motor has pre-set speed and torque limiters to protect the motor from damage caused by operating out of its designed parameters (0 to 0.8 inches water column total external static pressure). Check filter and ductwork. To clear re place filter if needed or repair/ add ductwork.

Indoor or outdoor unit capacity mismatch. Incorrect Indoor /outdoor capacity code selected.

Check for proper configuration in installation instruc tions. Alarm is just a warning. The system operation is not impacted at all and alarm would clear when Commissioning is exited.

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

No 24 Volt output on Y1 to C with non-communicating outdoor unit. Y1 relay / Stage 1 failed (Pilot relay contacts did not

close or the relay coil did not energize).

No 24 Volt output on Y2 to C with non-communicating outdoor unit. Y2 relay / Stage 2 failed (Pilot relay contacts did not

close or the relay coil did not energize).

No 24 Volts between R & O with non-communicating outdoor unit (Dual fuel module required for heat pump application).

Configuration link R to O needs to be cut on control board.

LSOM - Compressor ran more than 18 hours in air conditioning mode. Compressor protector is open. Check for high head

pressure, check compressor supply voltage. Out door unit power disconnect is open , compressor circuit breaker or fuse(s) is open, broken wire or connector is not making contact. Low or high pres sure switch open if present in the system. Compres sor contactor has failed to close.

LSOM - Outdoor unit system pressure trip. Compressor ran over 18 hours in air conditioning

mode.

LSOM - Compressor short-cycling (Running less than 4 minutes). Outdoor unit pressure trip. Check dirty coil, fan mo

tor, refrigerant charge.

LSOM - Compressor rotor locked. Compressor short cycling (Running less than 4 min

utes).

LSOM - Compressor open circuit. Check capacitor, wiring, hard start kit , replace com

pressor.

LSOM - Compressor open start circuit. Check compressor for hot (cool down) , check pres

LSOM - Compressor open run circuit.

sures, fan motor etc. Replace compressor if unable to get circuit to close and compressor to operate.

LSOM - Compressor contactor is welded.

LSOM - Compressor low voltage. Replace contactor.

Page 20

TABLE 15

OPERATING SEQUENCE

SLP98DFV and Single-Stage Outdoor Unit

OPERATING

SEQUENCE

SYSTEM DEMAND SYSTEM RESPONSE

Demand Relative Humidity

System

Condition

Step

1st

stage

O G Status D*

NO CALL FOR DEHUMIDIFICATION

Normal Operation 1 On On On Acceptable

VAC

BASIC MODE (only active on a Y1 thermostat demand)

Normal Operation 1 On On On Acceptable

Dehumidification

Call

2 On On On Demand

VAC

PRECISION MODE (operates independent of a Y1 thermostat demand)

Normal Operation 1 On On On Acceptable

Dehumidification

call

Dehumidification

call ONLY

2 On On On Demand

1 On On On Demand

VAC

On-board links 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 control. *ComfortSense

7000 thermostat ony

Compressor

High 100%

High 70%

High 100%

High 70%

control;

Blower

CFM

(COOL)

Comments

Compressor and indoor blower follow thermostat demand

Thermostat energizes Y1 and de-energizes D on a call for de-humidification

Dehumidification mode begins when humidity is greater than set point

Thermostat will keep out door unit energized after cooling temperature set point has been reached in order to maintain room humidity setpoint.

Page 21

TABLE 16

OPERATING SEQUENCE

SLP98DFV and Two-Stage Outdoor Unit

OPERATING

SEQUENCE

SYSTEM DEMAND SYSTEM RESPONSE

Demand Relative Humidity

System

Condition

Step

1st

stage

2nd

stage

Status D*

NO CALL FOR DEHUMIDIFICATION

Normal Operation -

1 On On

2 On

Acceptable

VAC

ROOM THERMOSTAT CALLS FOR FIRST STAGE COOLING

BASIC MODE (only active on a Y1 thermostat demand)

Normal Operation 1 On On

Dehumidification

Call

2 On

Acceptable

Demand

VAC

PRECISION MODE (operates independent of a Y1 thermostat demand)

Normal Operation 1 On On

Dehumidification

call

Dehumidification

call ONLY

2 On

1 On

Acceptable

Demand

VAC

ROOM THERMOSTAT CALLS FOR FIRST AND SECOND STAGE COOLING

BASIC MODE (only active on a Y1 thermostat demand)

Normal Operation 1 On

Dehumidification

Call

2 On

Acceptable

Demand

VAC

PRECISION MODE (operates independent of a Y1 thermostat demand)

Normal Operation 1 On On

Dehumidification

call

2 On

Acceptable

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

Thermostat energizes 2nd stage and de-ener gizes D on a call for dehumidification

Dehumidification mode begins when humidity is greater than set point

Thermostat will keep out door unit energized after cooling temperature set point has been reached in order to maintain room humidity setpoint.*

Thermostat energizes 2nd stage and de-ener gizes D on a call for dehumidification

Dehumidification mode begins when humidity is greater than set point

Dehumidification

call ONLY

1 On

Demand

On-board links at indoor unit with a two-stage outdoor unit: Cut factory link from Y1 to Y2 or cut W915 (Y1 to Y2) on SureLight grated control. With Condensing unit - Cut W914 (R to DS) on SureLight

VAC

High 70%

integrated control; With Heat Pump - Cut W914 (R to DS) & W951 (R to O) on SureLight integrated control. *ComfortSense

7000 thermostat only

Page 22

inte

Thermostat will keep out door unit energized after cooling temperature set point has been reached in order to maintain room humidity setpoint.

+ 49 hidden pages

Lennox SLP98DF090XV60C, SLP98DF110XV60C, SLP98DF090XV36C, SLP98DF090XV48C, SLP98DF070XV36B Handbook

Specifications and Main Features

Frequently Asked Questions

User Manual

SPECIFICATIONS

BLOWER DATA

Configuring Unit Size Codes