FHD-UL

FIELD WIRING DIAGRAMS — TYPICAL ELECTRIC DEFROST — 208/230/1/60 — (1) UNIT COOLER (TIMER ONLY) IIMPORTANT WIRING NOTES - INSTALLER PLEASE READ CAREFULLY! Sub-circuit fusing or service disconnect switches are not shown but may be required as per the NEC and / or local codes. It is the responsibility of the installing contractor to interpret and comply with all applicable electrical codes. Field install an 18 GA jumper wire between terminals 3 & 4 on terminal block TB2 for continuous low speed fan operation (870 RPM). Fan motors will operate continuously on high speed without jumper wire installed (11100 RPM). See page 20 for op- tional two speed fan relay control wiring if required. The defrost time clock and block out relay are typically located in the system condensing unit. All unit cooler power should feed from this unit. Make sure that the heater amp draw does not exceed the defrost timer contact rating (typically 40 resistive amps for an 8145-20 or equivalent timer). Also be sure the wire gauge size is adequate to carry the total amp load required. Factory installed jumper — remove if using a heater contactor. The room thermostat and liquid line solenoid valve are shown as field installed but may be factory mounted in the unit cooler. Make sure the solenoid holding coil is wired for the correct control voltage (115 or 230). # < + * **