MAIN POWER
LOW VOLTAGE |
BLOCK |
LOW VOLTAGE
ENTRANCE POWER THRU
THE CURB
CONTROL BOX
WARNING
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 condenser end or through the roof curb. Install conduit connectors at the desired entrance locations. External con- nectors must be weatherproof. All holes in the unit base must be sealed (including those around conduit nuts) to prevent water leakage 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.
HIGH VOLTAGE ENTRANCE (REMOVE PLUG)
| 12 3/8” |
| 30 1/4”* |
| 1:4 |
* (6 Ton - 34 1/4”) | LOW VOLTAGE ENTRANCE |
|
RETURN |
| |
|
| 3.5 DIA. |
SUPPLY | POWER THRU |
|
THE CURB |
| |
| 41/2” | |
|
| |
| 47 1/2” | 7 1/2” |
|
|
ELECTRICAL ENTRANCE AND THRU CURB
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.
3.Use #18 AWG wire for 24V control wiring runs not exceeding 75 feet. Use #16 AWG wire for 24V control wiring runs not exceeding 125 feet. Use #14 AWG wire for 24V control wiring runs not exceeding 200 feet. Low voltage wiring may be National Electrical Code (NEC) Class 2 where permitted by local codes.
4.Route thermostat wires from
NOTE:
TERMINAL | THERMOSTAT |
Red | R (24V) |
Green | G (Fan) |
Orange | O (Rev. Valve) |
White | W1 (Heat, 2nd)* |
Brown | W2 (Heat 3rd)* |
Yellow | Y (Cool) |
C (Blue) | C (Common) |
*Optional field installed heat connections
CPC/H 036 THROUGH 072
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