IMPORTANT
Use a thermocouple or thermistor electronic vacuum gauge that is calibrated in microns. Use an instrument capable of accurately measuring down to 50 microns.
WARNING
Danger of Equipment Damage. Avoid deep vacuum operation. Do not use compressors to evacuate a system. Extremely low vacuums can cause internal arcing and compressor failure. Damage caused by deep vacuum operation will void warranty.
Evacuating the system of non−condensables is critical for proper operation of the unit. Non−condensables are defined as any gas that will not condense under
temperatures and pressures present during operation of an air conditioning system. Non−condensables and water suction combine with refrigerant to produce substances that corrode copper piping and compressor parts.
Electrical
In the U.S.A., wiring must conform with current local codes and the current National Electric Code (NEC). In Canada, wiring must conform with current local codes and the current Canadian Electrical Code (CEC).
Refer to the furnace or air handler installation instructions for additional wiring application diagrams and refer to unit nameplate for minimum circuit ampacity and maximum overcurrent protection size.
24VAC TRANSFORMER
Use the transformer provided with the furnace or air handler for
SIZE CIRCUIT AND INSTALL DISCONNECT
1ReferSWITCHto the unit nameplate for minimum circuit ampacity, and maximum fuse or circuit breaker (HACR per NEC). Install power wiring and properly sized disconnect switch.
MAIN FUSE
BOX/BREAKER
PANEL
DISCONNECT
SWITCH
2INSTALL THERMOSTAT
Install room thermostat (ordered separately) on an inside wall approximately in the center of the conditioned area and 5 feet (1.5m) from the floor. It should not be installed on an outside wall or where it can be affected by sunlight or drafts.
THERMOSTAT
5FEET (1.5M)
NOTE Units are approved for use only with copper conductors. Ground unit at disconnect switch or to an earth ground.
NOTE 24VAC, Class II circuit connections are made in the control panel.
3UNIT LOW VOLTAGE CONNECTIONS
C
WIRE NUTS
BLACK 
YELLOW
CUTOUT WITH
AGROMMET
24V CONTROL WIRES B
HIGH VOLTAGE FIELD WIRING
FACTORY WIRING
LOW VOLTAGE (24V) FIELD WIRING
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| WIRE RUN LENGTH | AWG# INSULATION TYPE |
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| LESS THAN 100’ (30 METERS) | 18 | TEMPERATURE RATING |
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| MORE THAN 100’ (30 METERS) | 16 | 35ºC MINIMUM. |
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ARun 24VAC control wires through cutout with grommet. B Run 24VAC control wires through wire tie.
C Make 24VAC control wire connections using field provided wire nuts.
D Tighten wire tie to security 24V control wiring.
NOTE − FOR PROPER VOLTAGES, SELECT THERMOSTAT WIRE (CONTROL WIRES) GAUGE PER TABLE ABOVE.
NOTE − WIRE TIE PROVIDES LOW VOLTAGE WIRE STRAIN RELIEF AND TO MAINTAIN SEPARATION OF FIELD INSTALLED LOW AND HIGH VOLTAGE CIRCUITS.
NOTE − DO NOT BUNDLE ANY EXCESS 24VAC CONTROL WIRES INSIDE CONTROL BOX.
DTIGHTEN WIRE TIE
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XC14 SERIES
