Specification
Lennox Single Stage HSI Integrated Furnace Control for PSC Blower Motors
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SPECIFICATIONS:
Electrical Ratings: [@ 77°F (25°C)]
Input Voltage .............................................. 25 VAC 60 Hz
Max. Input Current: 45A @ 25 VAC
Humidier Load ............... 1.0 amp @ 24 VAC or 120 VAC
Electronic Air Cleaner....................... 1.0 amp @ 120 VAC
Flame Current Requirements:
Min. current to ensure ame detection ......... 0.25 μA DC*
Max. current for non-detection ..................... 0.25 μA DC*
Max. allowable leakage resistance .............. 100 M Ohms
*Measured with a DC microammeter in the ame probe lead
Operating Temp Range: -40° to 175°F (-40 to 80°C)
Humidity Range: 5% to 93% relative humidity (non-
condensing)
Dimensions: 5.9"W x 4.95"H x .797"D
Agency Approvals: CSA - USA / Canada, UL Recognized
Lennox, Armstrong,
AirEase, Concord,
Ducane, Aire-Flo
100973-01*
100973-02*
1012-83-9673A
1012-967
1012-968
1012-969*
1012-969A*
1012-977A
103085-01
103085-02
103085-03
103098-01
1195-83-100A
1195-100
12L4201
17W70*
50A55-120
56L8501
56W19
CROSS REFERENCES:
81W03 56W19 94W83 74W03
White-Rodgers
50M56U-801
Ignitor / Inducer
Connections
Sockets Pins Pins Sockets
2 harnesses cover
all combinations
Main
Harness Connections
Pins Pins Pins Sockets
Flame Sense
dedicated
3/16” spade
in main
harness
in main
harness
dedicated
3/16” spade
both options
Timings (sec)
Heat On 45 30 30 30 30/45
Heat Off 60/90/120/180 60/90/120/180 60/90/120/180 60/90/120/180 60/90/120/180
Cool On 0 1 2 2 2
Cool Off 0 60 60 45 45/60
Fan Speeds
Heat Heat Heat Heat Heat
Cool Cool Cool Cool Cool
— Fan Fan Fan Fan
Stand-off Locations
Ignitor Voltage
95V
(Replace w/ HotRod)
120V 120V 120V 120V
©2022 Emerson Electric Co. • White-Rodgers and Emerson are trademarks of Emerson Electric Co. All rights reserved • Customer Service or Technical Help: 888-725-9797 • Emerson.com/White-Rodgers
R-5567 (5/22)
74W03
75M1701*
78M1701*
78M4701*
80M2701
81W03*
81W11
94W83
R47582-001
OEM COMPARISON:
*Requires 120V Ignitor (21D64-2)
Replace multiple OEM controls with the 50M56U-801
1 Year Limited Warranty
Note: Also replaces 56L85.