Carrying Less Works Best
Universal
Nitride Integrated
Ignition System
White-Rodgers
50A65-843
The 50A65-843 Universal Nitride Integrated Ignition module is an automatic ignition control that
employs a microprocessor that continually monitors, analyzes, and controls the proper operation of
the gas burner, inducer, and fan. The 50A65-843 is unique because it incorporates our patented
adaptive algorithm routine that uses an 80V nitride ignitor to ensure the most effective ignitor
temperature, increasing the life expectancy of the ignitor. This one module will replace all of the
50A65-XXX integrated ignition nitride modules that have been manufactured by White-Rodgers.
The Universal Module has an extensive cross reference for replacement and includes additional
jumper wires, additional wiring harness, a jumper for Trane applications and a 3/16” terminal for
Lennox (only). The module also has terminals for powering a humidifier and an air cleaner.
FEATURES
• Extensive OEM Cross Reference
• Diagnostic LED
• Additional jumpers to extend the length of the con-
nections
SPECIFICATIONS
Electrical Rating [at 77°F (25°C)]:
Input Voltage ............................... 25 VAC, 50/60 Hz
Max. Input Current (@25 VAC) ................. 0.45 amp
Relay Load Ratings:
Valve Relay ........... 1.5 A @ 25 VAC, 50/60 Hz, 0.6f
Ignitor Relay . 2.0 A @ 120 VAC, 50/60 Hz (resistive)
Operating Temperature: .... -40 to 175°F (-48 to 80°C)
Humidity Range: ....................................... 5% to 93%
APPLICATIONS
Typical Applications:
Gas fired forced air furnaces
with integrated furnace control module and a
nitride ignitor
R-4152
50A65-XXX to 50A56-843 Cross Reference/Timing Chart
W/R Part Number
Customer
Part Number
50A65-120
Lennox
56L8401
10M9301
32M8801
15
4
4
20
15
5
250
45
0, 90,
120,180
0
0
Yes
Yes
20
4 times
N/A
50A65-143
Thermo Prod.
50A65-143
50A65-288
Amana
50A65-288
50A65-474,
-475
Trane
D341213P01
D341396P01
0
4
4
12
60
5
300
45
60, 90,
120,180
2
0,80
Yes
Yes
20
2 times
Yes
Universal
50A65-843
W/R
Standard
Pre Purge
Trial for Ignition
Ignition Activation Period
Valve Sequence
Interpurge
Post Purge
Lockout
Heat Delay to Fan on
Heat Delay to Fan Off
Cool Delay to Fan On
Cool Delay to Fan Off
Air Cleaner
Humidifier
Initial Warm-up
Retries
Twin
30
4
4
12
60
5
300
15, 30,
45, 60
60, 90,
120,180
0
90
Yes
Yes
20
2 times
N/A
0
4
4
12
60
15
300
30
60, 90,
120,180
5
45
Yes
Yes
20
2 times
N/A
30
4
4
12
60
15
300
30, 45
60, 90,
120,180
5
45,90
Yes
Yes
20
2 times
N/A
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a service mark of Emerson Electric Co.
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