Instruction/ maintenance manual of the product 50M56U-843 White Rodgers
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P A GE 3 CONT AINS WIRING HARNESS AND BLO WER CONNECTION INSTRUCTIONS FOR ALL APPLICA TIONS AND IMPORT ANT OEM REPLA CEMENT INSTRUCTION FOR: ● TRANE / AMERICAN ST AND ARD ● RHEEM / RUUD ● BR Y ANT / CARRIER / D A Y & NIGHT / P A YNE INST ALLER MUST READ www .
2 SPECIFICA TIONS MOUNTING AND WIRING All wiring should be installed by a qualified heating and air conditioning contractor or licensed electrician, according to local and national electrical codes and ordinances.
3 INST ALLER MUST READ FOR PROPER INST ALLA TION • Wiringhar nessesandaUniversal21D64-2ignitorare included in this package . Refer to the enclosed “Cross Ref erenceandHarnessApplicationChar t”(P ar tNumber 37-7077) f or harness selection and ignitor application inf ormation.
4 WIRING DIA GRAM TH TR MV HI MV COM MV LO GND HLO HLI PSO PSI C R G W Y Y W G R THERMOSTAT 2 STAGE GAS VALVE HIGH LIMIT (N. C.) ROLLOUT (N. C.) AUX. HIGH LIMIT (N.
5 50M56 TERMINAL TERMINAL TYPE SYSTEM COMPONENT CONNECTION TYPICAL SYSTEM WIRING TABLE † Maximum recommended flame probe wire length is 36 inches. low v oltage ther mostat W ter minal (or equiv alen.
6 OPERA TION OPTION SWITCHES The option switches on the 50M56U-843 control are used to determine the length of the heat dela y-to-fan-off per iod, the mode of operation, and the 2nd stage dela y per iod. The f ollowing illustration shows the options and the selections of the switch positions.
7 OPERA TION DIA GNOSTIC FEA TURES The 50M56U-843 control continuously monitors its own operation and the operation of the system. If a failure occurs, the LED will indicate a f ailure code as shown on page 8.
8 www .white-rodgers.com www .emersonclimate.com White-Rodgers is a division of Emerson Electric Co. The Emerson logo is a trademark and service mar k of Emerson Electric Co.
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