White-Rodgers 21D83M-843 Surelite Ignition Board, Hot Surface Ignition, Lennox

White-Rodgers 21D83M-843 Surelite Ignition Control Board Replacement. The kit includes the 50A66-843 which is an automatic gas interrupted ignition control that employs a microprocessor to continually monitor, analyze, and control the proper operation of the gas burner, inducer, and fan. These controls incorporate system fault analysis for quick gas flow shut-off, coupled with automatic ignition retry upon sensing a fault correction.

Replaces 97L48, 97L4801, 24L85, 24L8501, 56L83, 56L8301, 63K89, 63K8901, 83M00, 83M001.
Also replaces 69M08, 69M0801, 32M88, 32M8801, 10M93, 10M9301, 56L84, 56L8401, 12L69 & 12L6901, LB-109531A.

Includes Kit includes:
1 – 50A66-843 ignition control board
1 – Wiring harness (9-pin to 12-pin)
1 – Wiring harness (4-pin to 6-pin)
1 – Mounting panel
4 – Stand-off fasteners
1 – Circuit breaker
1 – 4" blue wire
2 – Wiring diagrams

ELECTRICAL RATINGS [@ 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 amp @ 25 VAC 50/60 Hz 0.6 pf
Ignitor Relay: 2.0 amp @ 120 VAC 50/60 Hz (resistive),
Inducer Relay: 2.2 FLA-3.5 LRA @ 120 VAC
Circulator Relay: 14.5 FLA-25.0 LRA @ 120 VAC.

OPERATING TEMPERATURE RANGE:
-40° to 175°F (-40° to 80°C).

HUMIDITY RANGE:
5% to 93% relative humidity (non-condensing).

Timing Specs: (@ 60 Hz**)
Flame Establishing Time: 0.8 sec Max.
Flame Failure Response Time: 2.0 sec Max.
**At 50 Hz, all timing specifications should be increased by 20%.
For More Info See Installation Instructions PDF Below.