Install Instructions

ManualsBrandsWhite Rodgers ManualsHeating SuppliesIntegrated Intelligent Valve Retrofit Kit

50I56D-905

Intelligent Gas Valve Retrot Kit For

ICP & Lennox Brand Systems

INSTALLATION INSTRUCTIONS

PARTS INCLUDED

• 50I56-905 120V HSI IP Furnace Control Board

• 1 - Main CONTROL Harness (0115-0339)

• 1 - Gas VALVE Harness (0115-0336)

• 1 - Ignitor/Inducer C Harness (0115-0256)

• 1 - 791Q-905KT1 120V Ignitor + Flame Sensor Kit

for Pilot Assembly

• 1 - 36G33-905 IP Gas Valve

The 50I56D-905 Retrot Kit is an aftermarket service solution for popular ICP and Lennox brand furnaces using SV9500,

SV9501 and SV9502 Intelligent Valves and Fan Timer Control boards. Upgrades system from 24V to 120V hot surface pilot

ignition and utilizes reliable standard IP gas valve. For single stage furnaces with PSC inducer and blower motors.

DESCRIPTION

SPECIFICATIONS

Failure to comply with the following warnings could result

in personal injury or property damage.

• Installation should be done by a qualied heating and

air conditioning contractor or licensed electrician.

• All wiring must conform to local and national electrical

codes and ordinances.

• Following installation or replacement, follow

manufacturer’s recommended installation/service

instructions to ensure proper operation.

FIRE HAZARD

• Do not exceed the specied voltage.

• Protect control from direct contact with water (dripping,

spraying, rain, etc.).

• If the control has been in direct contact with water,

replace the control.

• Label all wires before disconnection when servicing

controls. Wiring errors can cause improper and

dangerous operation.

• Route and secure wiring away from ame.

SHOCK HAZARD

• Disconnect electric power before servicing.

• Ensure proper earth grounding of appliance.

• Ensure proper connection of line neutral and line hot

wires.

EXPLOSION HAZARD

• Shut off main gas to appliance until installation is

complete.

WARNING

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE

INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL

INJURY AND/OR PROPERTY DAMAGE.

emerson.com/white-rodgers

PART NO. 37-7838001

2105

• 4 - 1” Sheet Metal Mounting Screws

• 4 - Wire Ties

• 2 - 1/4” Female Crimp-on Spades

• 2 - 7/8” Sheet Metal Wire Grommets

• Unit Retrot Label

• Installation Instructions

• Troubleshooting Label on Control Cover

ELECTRICAL RATINGS:

Input Low Voltage: 25 VAC, 60 Hz

Input Line Voltage: 120 VAC, 60 Hz

Max. Input Current: .45A @ 25 VAC

Flame Current Requirements:

Minimum current to insure ame detection: 0.25 µa DC*

Maximum current for non-detection: 0.1 µa DC

Maximum allowable leakage resistance: 100 M ohms

*Measuring with a DC voltmeter (1VDC = µA)

Relay Contact Ratings:

Inducer Output: 2.2 FLA @ 120 VAC

3.5 LRA

Blower Output: 14.5 FLA @ 120 VAC

25 LRA

Gas Valve Output: 1.5A @ 25 VAC 0.6 pf

Ignitor Output: 6.0A @ 120 VAC (resistive)

Hum and EAC Load: 1.0A @ 120 VAC

OPERATING TEMPERATURE RANGE:

-40° to 176°F (-40° to 80°C)

HUMIDITY RANGE:

5 to 95% relative humidity (non-condensing

GASES APPROVED: Natural, Manufactured, Mixed,

Liquid Petroleum, and LP Gas Air Mixtures.

Summary of content (8 pages)

PAGE 1
50I56D-905 Intelligent Gas Valve Retrofit Kit For ICP & Lennox Brand Systems INSTALLATION INSTRUCTIONS FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND/OR PROPERTY DAMAGE.
PAGE 2
INSTALLATION REMOVE PARTS TO PREPARE FOR RETROFIT STEP DETAILS Warning: Disconnect unit electrical & gas supply 1 Remove access panels 2 Take pictures before removing any wiring 3 Label existing wiring as necessary 4 Disconnect both 4-pin plugs and pilot tubing, remove gas valve & discard 5 Disconnect pilot assembly. Remove 24V HSI ignitor + sensor & clip from assembly. 6 Unwire fan timer, remove & discard NOTE on removal step 5: discard existing 24V ignitor + sensor and clip.
PAGE 3
INSTALLATION RETROFIT NEW PARTS INTO FURNACE STEP DETAILS 8 Connect Ignitor hot (IGN) and neutral (IGN N) from EXTENSION harness to C harness leads 2 & 4, see control board label 9 Connect Inducer hot (IND) and neutral (IND N) to C harness leads 1 & 3, see control board label Plug main CONTROL harness into control board 12-pin connector E22, see page 4 • 10 NOTE C HARNESS / 0115-0256 STEPS: 7, 8, 9 Inducer New Control Board Route blue PS pressure switch wire from control board to burner area • C
PAGE 4
INSTALLATION CONTROL BOARD LESS COVER FINISH INSTALLATION AND TEST UNIT STEP DETAILS 15 Connect line voltage hot to LINE-H, then connect LINE NEUTRAL 16 Connect transformer hot to XFMR-H, then connect transformer neutral to LINE NEUTRAL 17 Connect blower leads • Cool speed to COOL-H • Heat speed to LO HEAT-H • Unused leads on PARK, PARK • Neutral to LINE NEUTRAL 18 Connect thermostat wires to screw terminal block 19 Verify dipswitch setting using cover label and DIPSWITCHES section below 20 Op
PAGE 5
SPECIAL REPLACEMENT INSTRUCTIONS Armstrong MV* / High Limit Wiring 1. Remove the double red wire/single spade from limit 2. Clip off the single spade terminal 3. Strip both red wires and crimp on provided ¼” female spade terminals to each wire 4. Plug the red wire from the control board wiring (9-pin plug between the burner and blower sections of furnace) back onto the limit 5.
PAGE 6
WIRING DIAGRAMS TYPICAL ICP BRANDS & DUCANE WIRING (MV connected through 12 x 6 C harness) 6
PAGE 7
WIRING DIAGRAMS TYPICAL LENNOX/ARMSTRONG BRANDS WIRING (MV connected from 12 pin to 4 pin VALVE harness) 7
PAGE 8
TIMINGS & WIRING DESIGNATORS Wiring Designator Conversions 50I56-905 Timings Pre-purge 15 sec Ignitor Warm-up (turned on simultaneously with pilot) 0 sec Flame Failure Response 2 sec max Trial for Ignition 90 sec Post-purge 5 sec Energize Main Valve after Pilot Proven 2.