50M56U-801
Single Stage | Direct | HSI
Integrated Furnace Control Kit
INSTALLATION INSTRUCTIONS
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
System Lockout and Diagnostic Features ......................................................................................................................... Page 5
Troubleshooting ................................................................................................................................................................. Page 5
Definition of Terms and Timing Specifications ................................................................................................................... Page 7
DESCRIPTION
ELECTRICAL SPECIFICATIONS
CONTENTS
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:
white-rodgers.com
emersonclimate.com
PART NO. 37-7616B
37-7616A
1620
• 50M56-801 Integrated Furnace Control
• 2 Harness Assemblies
• Control Label
• Wire Ties
• Installation Instructions
Electrical Specification [@77 deg F (25 deg C)]
Input Voltage
25 VAC 60Hz
Max Input Current
.45A @ 25 VAC
Gas Valve Relay
1.5 amp 0.6 PF @ 30 VAC
Ignitor Relay
1.2 amp @ 120 VAC
Inducer Relay
2.8 amp @ 120 VAC
Circulator Relay
10 amp FLA @ 120 VAC
Circulator Relay
25 amp LRA @ 120 VAC
Humidifier Load
1.0 amp @ 24 VAC or 120 VAC
Electronic Air Cleaner
1.0 amp @ 120 VAC
Minimum current to insure flame detection
0.25 µa DC*
Maximum current for non-detection
0.1 µa DC*
Maximum allowable leakage resistance
100 M ohms
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
Natural, Manufactured, Mixed, Liquefied Petroleum, and LP Gas Air Mixtures are all approved for use.
Timing Specification
Flame Establishing Time
0.8 sec
Flame Failure Response Time
2.0 sec
*Measured with a DC microammeter in the flame probe lead
