A rooftop packaged unit receives one hundred twenty volt single-phase power through a typical disconnect switch and interfaces with low voltage control wiring connected to a programmable electronic room thermostat. A smoke detector relay ties into the power supply to provide global shutdown capability during an alarm event.
DISCONNECT (TYP.) E E M M M T 120V. 1PH N P SD RELAY RELAY SD CARRIER 33CONNECTSTAT43 ELECTRONIC PROGRAMMABLE ROOM THERMOSTAT WITH 4 HR. ROOFTOP PACKAGED UNIT LOW VOLTAGE CONTROL WIRING
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