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These controls incorporate system fault analysis for quick gas flow shut-off, coupled with automatic ignition retry upon sensing a fault correction. Signals interpreted during continual surveillance of the thermostat and flame sensing element initiate automatic ignition of the burner, sensing of the flame, and system shut-off during normal operation. TRANE APPLICATION - Installer MUST read page 3 “Mounting and Wiring” PRECAUTIONS Installation should be done by a qualified heating and air conditioning contractor or licensed electrician. If in doubt about whether your wiring is millivolt, line, or low voltage, have it inspected by a qualified heating and air conditioning contractor or licensed electrician. Do not exceed the specification ratings. All wiring must conform to local and national electrical codes and ordinances. This control is a precision instrument, and should be handled carefully. Rough handling or distorting components could cause the control to malfunction. Following installation or replacement, follow manufacturer’s recommended installation/service instructions to ensure proper operation. WARNING Failure to comply with the following warnings could result in personal injury or property damage. FIRE HAZARD • Do not exceed the specified voltage. • Protect the control from direct contact with water (dripping, spraying, rain, etc.). • If the control has been in direct contact with water, replace the control. • Label all wires before disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. • Route and secure wiring away from flame. SHOCK HAZARD • Disconnect electric power before servicing . • Ensure proper earth grounding of appliance. • Ensure proper connection of line neutral and line hot wires. EXPLOSION HAZARD • Shut off main gas to appliance until installation is complete. CAUTION Do not short out terminals on gas valve or primary control. Short or incorrect wiring may damage the thermostat. CONTENTS Description ........................................................ 1 Precautions ....................................................... 1 Specifications .................................................... 2 Installation ......................................................... 3 Mounting & Wiring Operation .......................................................... 6 Mounting Hole Template .................................... 8 White-Rodgers is a division PART NO. 37-6265G of Emerson Electric Co. Replaces 37-6265F SPECIFICATIONS 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: 6.0 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 Flame Current Requirements: Minimum current to insure flame detection: 1 .a DC* Maximum current for non-detection: 0.1 .a DC* Maximum allowable leakage resistance: 100 M ohms *Measured with a DC microammeter in the flame probe lead OPERATING TEMPERATURE RANGE: -40° to 175°F (-40° to 80°C) HUMIDITY RANGE: 5% to 93% relative humidity (non-condensing) MOUNTING: Surface mount multipoise Timing Specs: (@ 60 Hz**) maximum Flame Establishing Time: 0.8 sec Flame Failure Response Time: 2.0 sec ** At 50 Hz, all timing specifications should be increased by 20% Gases Approved: Natural, Manufactured, Mixed, Liquified Petroleum, and LP Gas Air Mixtures are all approved for use. TIMING SPECIFICATIONS (All times are in seconds, unless noted otherwise) 50A55-843 PRE-PURGE 30 INITIAL IGNITOR WARM-UP (1st 64 attempts) 17 MINIMUM IGNITOR WARMUP 5 MAXIMUM IGNITOR WARMUP 21 IGNITION ACTIVATION PERIOD 1 TRIAL FOR IGNITION PERIOD 4 RETRIES 2 times VALVE SEQUENCE PERIOD 12 INTERPURGE 60 POST-PURGE 15 LOCKOUT TIME 300 HEAT DELAY-TO-FAN-ON* 30, 45 HEAT DELAY-TO-FAN-OFF* 60/90/ 120/180 COOL DELAY-TO-FAN-ON 5 COOL DELAY-TO-FAN-OFF* 45, 90 AUTO RESET 60 minutes HUMIDIFIER YES ELECTRONIC AIR CLEANER YES * These times will vary depending on option switch position. The control is factory-set at 30 seconds heat delay- to-fan-on, 180 seconds heat delay-tofan- off and 45 seconds cool delay-tofan- off. See OPERATION section for further information. INSTALLATION MOUNTING AND WIRING WARNING CAUTION FIRE HAZARD • Do not exceed the specified voltage. • Replace existing control with exact model and dash number. • Protect the control from direct contact with water (dripping, spraying, rain, etc.). • Label all wires before disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. • Route and secure wiring away from flame. SHOCK HAZARD • Disconnect electric power before servicing . • Ensure proper earth grounding of appliance. • Ensure proper connection of line neutral and line hot wires. EXPLOSION HAZARD • Shut off main gas to appliance until installation is complete. Do not short out terminals on gas valve...