White Rodgers 50A55-285 manual

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Table of contents for the manual

  • Page 1

    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.). • If the control has been in direct contact with water, replace the control. • Label all wires before disconnection when servic- ing controls[...]

  • Page 2

    2 SPECIFICA TIONS 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 Curr[...]

  • Page 3

    3 INST ALLA TION MOUNTING AND WIRING All wiring should be installed according to local and national electrical codes and ordinances. The control must be secured to an area that will experience a minimum of vibration and remain below the maximum ambient temperature rating of 175 ° F. The control is approved for mini- mum ambient temperatures of -40[...]

  • Page 4

    4 TH TR MV MV GND FP HLO HLI PS C R G W Y EAC N HUM N XFMR N LINE N CIR N IGN IND HUM EAC XFMR LINE PARK PARK HEAT COOL IGNITOR Y W G R THERMOSTAT GAS VALVE HIGH LIMIT (N. C.) ROLLOUT (N. C.) AUX. HIGH LIMIT (N. C.) PRESSURE SWITCH (N. O.) FLAME SENSOR PROBE COMPRESSOR CONTACTOR ELECTRONIC AIR CLEANER HUMIDIFIER INDUCER CIRCULATOR BLOWER 50A55 24 V[...]

  • Page 5

    5 50A55 TERMINAL TERMINAL TYPE SYSTEM COMPONENT CONNECTION TYPICAL SYSTEM WIRING TABLE * maximum recommended flame probe wire length is 36 inches. W G R Y C MV (2 terminals) TR TH RO1 RO2 FP PS HLI HLO GND (unused terminal) IND IGN COOL HEAT PARK (2 terminals) LINE XFMR EAC (optional) HUM (optional) CIR N LINE N XFMR N EAC N (optional) HUM N (optio[...]

  • Page 6

    6 OPERA TION OPTION SWITCHES The option switches on the 50A55-285 control are used to determine the length of the heat delay-to-fan-off periods. The following table shows the time periods that will result from the various switch positions. HEA T MODE In a typical system, a call for heat is initiated by closing the thermostat contacts. This starts t[...]

  • Page 7

    7 SYSTEM LOCKOUT AND DIAGNOSTIC FEA TURES SYSTEM LOCKOUT FEATURES When system lockout occurs, the gas valve is de-energized, the circulator blower is energized at heat speed, and, if flame is sensed, the inducer blower is energized. The diagnostic indica- tor light will flash or glow continuously to indicate system status. (System lockout will neve[...]

  • Page 8

    MOUNTING HOLE TEMPLA TE FOR MOUNTING HOLE LOCA TIONS 4.172 ± .007 (2 plcs.) 6.402 ± .010 (2 plcs.) Refer to page 3 of the installation instructions for proper installation. MOUNTING HOLE TEMPLA TE[...]