FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.
Description ........................................................................................................................................................................ Page 1
Electrical Specifications .................................................................................................................................................... Page 1
Installation ......................................................................................................................................................................... Page 2
Wiring Diagram ................................................................................................................................................................. Page 3
Operation .......................................................................................................................................................................... Page 4
Troubleshooting ................................................................................................................................................................. Page 5
Definition of Terms and Timing Specifications ................................................................................................................... Page 7
The 50M56U-801 kit is a HSI Integrated Furnace Control designed
to replace virtually all 120V Lennox HSI single stage furnace
controls using a PSC blower motor. It employs a microprocessor
to continually monitor, analyze, and control the proper operation
of the gas burner, inducer, and fan. The Kit contains:
Input Voltage
Max Input Current
Gas Valve Relay
Ignitor Relay
Inducer Relay
Circulator Relay
Circulator Relay
Humidifier Load
Electronic Air Cleaner
Minimum current to insure flame detection
Maximum current for non-detection
Maximum allowable leakage resistance
Natural, Manufactured, Mixed, Liquefied Petroleum, and LP Gas Air Mixtures are all approved for use.
Flame Establishing Time
Flame Failure Response Time
*Measured with a DC microammeter in the flame probe lead
• 50M56-801 Integrated Furnace Control
• 2 Harness Assemblies
• Control Label
• Wire Ties
• Installation Instructions
Electrical Specification [@77 deg F (25 deg C)]
Operating Temperature Range
-40° to 175°F (-40° to 80°C)
HUMIDITY RANGE:
5% to 93% relative humidity (non-condensing)
MOUNTING
Surface mount standoffs
Gases Approved
Timing Specification
white-rodgers.com
emersonclimate.com
50M56U-801
Single Stage | Direct | HSI
Integrated Furnace Control Kit
INSTALLATION INSTRUCTIONS
ELECTRICAL SPECIFICATIONS
25 VAC 60Hz
.45A @ 25 VAC
1.5 amp 0.6 PF @ 30 VAC
1.2 amp @ 120 VAC
2.8 amp @ 120 VAC
10 amp FLA @ 120 VAC
25 amp LRA @ 120 VAC
1.0 amp @ 24 VAC or 120 VAC
1.0 amp @ 120 VAC
0.25 µa DC*
0.1 µa DC*
100 M ohms
0.8 sec
2.0 sec
CONTENTS
DESCRIPTION
PART NO. 37-7616B
37-7616A
1620