Sterling EV - Manual (Page 10)

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ELECTRICAL CONNECTIONS
Do not use any tools (i.e. screwdriver,
pliers, etc.) across the terminals to check for power.
Use a voltmeter.
USE COPPER CONDUCTORS ONLY!
UNIT TERMINALS ARE NOT DESIGNED TO ACCEPT
OTHER TYPES OF CONDUCTORS. Failure to do so
may cause damage to the equipment.
It is recommended that the electrical power to each
unit be provided by a separate, fused, and permanently
live electrical circuit. A disconnect switch of suitable
electrical rating for each unit should be placed as close
to the controls as possible. Each unit must be electrically
grounded in accordance with the latest edition of the
National Electrical Code, ANSI/NFPA No. 70-1996, or
CSA Standard C22.1. Sample wiring connections are
depicted in Figures 9 & 10.
NOTICE: Consult the factory before making any
changes to factory wiring.
OPTIONAL FILL AND DRAIN KIT: Optional Evaporative
Cooler Fill and Drain Kit consists of two motorized valves,
installed in the building, and piped and wired to the roof.
The kit eliminates the need to go to the roof to fi ll or drain
the cooler for seasonal changeover, and automatically
maintains the water level. See sample Figure 10. Refer
to the kit's instruction.
GROUNDING: Install a ground wire to suitable ground
according to local codes.
HAZARDOUS VOLTAGE!
DISCONNECT ALL ELECTRIC
POWER INCLUDING REMOTE
DISCONNECTS BEFORE
SERVICING. Failure to
disconnect power before
servicing can cause severe
personal injury or death.
Refer to the unit data plate to determine the supply
voltage.
Do not service before disconnecting
power or there could be a potential for an electrical
shock hazard.
The motor name-plate and electrical rating on the
transformer should be checked before energizing the
unit electrical system. All external wiring must conform
to ANSI/NFPA No. 70-1996, National Electrical Code
(or the latest edition of) and applicable local codes; in
Canada, to the Canadian Electrical Code, Part 1 CSA
Standard C22.1
“Dashed” lines represent either fi eld wiring (by others) or
optional equipment. Refer to optional items (shown on wir-
ing diagram included with unit) - these will be hard wired.
Do not jumper factory wiring.
Mis-wiring of safety circuits may result in fi re
or death.
NOTICE: For all wiring connections, refer to the
wiring diagram shipped with the unit (either affi xed
to the side jacket or enclosed in the unit’s installation
instruction envelope). Should any original wire
supplied with the unit have to be replaced, it must be
replaced with wiring material having a temperature
rating of at least 105°C.