Instruction/ maintenance manual of the product 50A55-843 White Rodgers
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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 servic- ing controls.
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.
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.
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 IGN N IND N HUM EAC XFMR LINE PARK PARK HEAT COOL IGNITOR Y W G R THERMOSTAT GAS VALVE HIGH LIMIT (N.
5 50A55 TERMINAL TERMINAL TYPE SYSTEM COMPONENT CONNECTION TYPICAL SYSTEM WIRING TABLE W G R Y C TWIN* MV (2 terminals) TR TH RO1 RO2 FP PS HLI HLO GND (unused terminal) IND IGN IND N IGN N COOL HEAT .
6 OPERA TION OPTION SWITCHES The option switches on the 50A55-843 control are used to determine the length of the cool delay-to-fan-off, heat delay-to- fan-on and heat delay-to-fan-off periods. The following table shows the time periods that will result from the various switch positions.
7 TWINNING INTERF A CE If the control has six screw terminals, one of which is designated TWIN , the control is equipped with a single wire twinning interface. If twinning is used, either control will process a call for heat, cool or fan as described above.
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.
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