White Rodgers 50A55-843 User Manual

Also see for 50A55-843: Installation instructions

Contents

2SPECIFICATIONSELECTRICAL RATINGS [@ 77°F (25°C)]:Input Voltage: 25 VAC 50/60 HzMax. Input Current @ 25 VAC: 0.45 ampRelay Load Ratings:Valve Relay: 1.5 amp @ 25 VAC 50/60 Hz 0.6 pfIgnitor Relay: 6.0 amp @ 120 VAC 50/60 Hz(resistive)Inducer Relay: 2.2 FLA–3.5 LRA @ 120 VACCirculator Relay: 14.5 FLA–25.0 LRA @ 120 VACFlame Current Requirements:Minimum current to insure flame detection: 1 μa DC*Maximum current for non-detection: 0.1 μa DC*Maximum allowable leakage resistance: 100 M ohms*Measured with a DC microammeter in the flame probe leadOPERATING TEMPERATURE RANGE:-40° to 175°F (-40° to 80°C)HUMIDITY RANGE:5% to 93% relative humidity (non-condensing)MOUNTING:Surface mount multipoiseTiming Specs: (@ 60 Hz**)maximumFlame Establishing Time: 0.8 secFlame Failure Response Time: 2.0 sec** At 50 Hz, all timing specifications should be increased by20%Gases Approved: Natural, Manufactured, Mixed, LiquifiedPetroleum, and LP Gas Air Mixtures are all approved for use.TIMING SPECIFICATIONS(All times are in seconds, unless noted otherwise)PRE-PURGEINITIAL IGNITOR WARM-UP(1st 64 attempts)MINIMUM IGNITOR WARM-UPMAXIMUM IGNITOR WARM-UPIGNITION ACTIVATIONPERIODTRIAL FOR IGNITIONPERIODRETRIESVALVE SEQUENCE PERIODINTERPURGEPOST-PURGELOCKOUT TIMEHEAT DELAY-TO-FAN-ON*HEAT DELAY-TO-FAN-OFF*COOL DELAY-TO-FAN-ONCOOL DELAY-TO-FAN-OFF*AUTO RESETHUMIDIFIERELECTRONIC AIR CLEANER3017521142 times12601530030, 4560/90/120/180545, 9060 minutesYESYES50A55-843* These times will vary depending onoption switch position. The control isfactory-set at 30 seconds heat delay-to-fan-on, 180 seconds heat delay-to-fan-off and 45 seconds cool delay-to-fan-off. See OPERATION section forfurther information.