The 50A55-743 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. signals interpreted during continual surveillance of the thermostat and flame sensing element initiate automatic ignition of the burner, sensing of the flame, and system shutoff during normal operation. these controls incorporate system fault analysis for quick gas flow shutoff , coupled with automatic ignition retry upon sensing a fault correction. it is designed as a replacement for the following controls.
WHITE-RODGERS™ Replacement Integrated Furnace Control, 25 VAC, 0.45 A, 5 to 93% RH Humidity Rating, Surface Mounting, -40 to 176 deg F, 5-7/8 in H x 4-3/8 in W x 1-1/4 in D
Amperage Rating0.45 A
Dimensions5-7/8 in H x 4-3/8 in W x 1-1/4 in D
Humidity Rating5 to 93% RH
Mounting TypeSurface
Temperature Rating-40 to 176 deg F
Voltage Rating25 VAC
Twinning connection
Fused to protect low voltage system transformers
120 VAC igniter output
120 VAC humidifier output
120 VAC electronic air cleaner output
120 VAC two speed PSC circulator output
5 A fuse protection
Furnace status LED
Heat fan OFF delay (dipswitch selectable)
1.5 A valve relay
6 A igniter relay
2.2 A full load - 3.5 A locked rotor inducer relay
14.5 A full load - 25 A locked rotor circulator relay