White-Rodgers WR 50A55-3797 CONTROL FURNACE 120V

The 50A55-3797 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.

For Trane Single Stage HSI Controls

Flash Code Diagnostics

• Fused to protect low voltage system transformers
• 120 VAC ignitor output
• 120 VAC humidifier output
• 120 VAC electronic air cleaner output
• 120 VAC 2-speed PSC circulator output
• 5 A fuse protection
• Furnace status LED
• Heat fan off delay (dipswitch selectable)
• -40 to 176 deg F
• 5 to 93 percent relative humidity
• 1.5 A valve relay
• 6 A ignitor relay
• 2.2 FLA to 3.5 LRA inducer relay
• 14.5 FLA to 25 LRA circulator relay
• 1 uA DC min current
• 0.10 uA DC max current
• 100 M ohm leakage resistance
• Maximum timing specification
• 0.8 sec flame establishing
• 2 sec flame failure response

CSA Certified