FORM 100.10-NOM2
31
YORK INTERNATIONAL
TYPICAL ELECTRIC HEATER WIRING DIAGRAM
LD02466
CAUTION:
EXTERNAL MULTISTEP THERMOSTAT OR STEP CONTROLLERS MUST BE WIRED SO
THAT THE HEATER STAGES ARE TURNED ON SEQUENTIALLY STARTING WITH STAGES 1, 2, 3 . . .
AND TURNED OFF SEQUENTIALLY IN THE REVERSE ORDER; i.e. . . . 3, 2, 1.
NOTES:
1. FOR SUPPLY CONNECTIONS, USE MIN AWG COPPER CONDUCTORS
SUITABLE FOR AT LEAST 78°C (167°F).
2. SUPPLY VOLTAGE , PHASE , CONTROL VOLTAGE .
3. FIELD TERMINALS SUITABLE FOR USE WITH AWG COPPER CONDUC-
TORS ONLY.
4. THIS HEATER REQUIRES 1 SUPPLY CIRCUIT OF KW.
5. CONTROL CIRCUIT WIRING TO BE N.E.C. CLASS 1.
POWER: (FACTORY WIRED)
POWER: (FIELD WIRED)
CONTROL (FACTORY WIRED)
CONTROL (FIELD WIRED)
FIG. 35 –
TYPICAL ELECTRIC HEATER
2
