CAUTION |
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TO AVOID PROPERTY DAMAGE OR PERSONAL INJURY DUE TO FIRE, USE ONLY COPPER CONDUCTORS.
CAUTION
LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING
CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER AND
DANGEROUS OPERATION. VERIFY PROPER OPERATION AFTER
SERVICING.
NOTE: A
Ensure the data plate is not covered by the
•Some disconnect switches are not fused. Protect the power leads at the point of distribution in accordance with the unit’s data plate.
•The unit must be electrically grounded in accordance with local codes or, in the absence of local codes, with the latest edition of the National Electrical Code
•Connect power wiring to the Single Point Power block. This terminal block is located within the main control box.
FAILURE OF UNIT DUE TO OPERATION ON IMPROPER LINE VOLTAGE OR WITH EXCESSIVE PHASE UNBALANCE CONSTITUTES PRODUCT ABUSE AND WILL VOID YOUR WARRANTY AND MAY CAUSE SEVERE DAMAGE TO THE UNIT ELECTRICAL COMPONENTS.
Areas Without Convenience Outlet
It is recommended that an independent 115V power source be brought to the vicinity of the roof top unit for portable lights and tools used by the service mechanic.
UNITS INSTALLED ON ROOF TOPS
Main power and low voltage wiring may enter the unit through the side or through the roof curb. Install conduit connectors at the desired entrance locations. External connectors must be weatherproof. All holes in the unit base must be sealed (including those around conduit nuts) to prevent water leak- age into building. All required conduit and fittings are to be field supplied.
Supply voltage to roof top unit must not vary by more than 10% of the value indicated on the unit’s data plate. Phase voltage unbalance must not exceed 2%. Contact your local power company for correction of improper voltage or phase unbalance.
Line voltage connects
to middle contactor 
on 460v and 575v
Gas Packs
Power Block (Coolers &
230V Gas Packs Only)
Line voltage connects to power block on Coolers and the 230v Gas Packs
Field wiring enters from this direction
Ground
Lug
Low Voltage |
Terminal Strip |
Thermostat wiring for all units connect to low voltage strip
ELECTRICAL ENTRANCE LOCATIONS
Unit is equipped with Single Point Power Block and Low Volt- age Block.
LOW VOLTAGE CONTROL WIRING
1.A 24V thermostat must be installed for unit operation. It may be purchased with the unit or field
2.Locate thermostat or remote sensor in the conditioned space where it will sense average temperature. Do not locate the device where it may be directly exposed to supply air, sunlight or other sources of heat. Follow installation instructions packaged with the thermostat.
POWER AND LOW VOLTAGE BLOCK LOCATIONS
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