STEP 4 -- ELECTRICAL (CONTINUED) -- High Voltage and Field Control Wiring
The following illustration provide an example of control wiring connections when using standard thermostat.
ROUTING HIGH VOLTAGE, GROUND AND CONTROL WIRING
HIGH VOLTAGE / GROUND WIRES
FIELD CONTROL WIRING
Any excess high voltage field wiring should be trimmed and secured away from any low voltage field wiring. To facilitate a conduit, a cutout is located in the bottom of the control panel. Connect conduit to the control panel using a proper conduit fitting.
NOTE — Wire tie provides low voltage control wire strain relief and maintains separation of
NOTE — For proper voltages, select thermostat wire (control wires) gauge per table above.
NOTE — Do not bundle any excess 24VAC control wires inside control panel.
Install low voltage wiring from outdoor to indoor unit and from thermostat to indoor unit as illustrated.
ARun 24VAC control wires through hole with grommet and secure with provided wire tie.
THERMOSTAT | INDOOR UNIT | |
| POWER | |
R | R | |
| HEAT | |
W1 | W | |
| ||
| YELLOW | |
Y | COOLING | |
Y | ||
| ||
G | INDOOR BLOWER | |
G | ||
| BLACK | |
| COMMON | |
C | C |
OUTDOOR UNIT
Y1
C
BMake 24VAC thermostat wire connections. Locate the two wires from the contactor and make connection using
S Yellow to Y1
S Black to C (common)
| WIRE RUN LENGTH | AWG# INSULATION TYPE |
| |
| LESS THAN 100' (30 METERS) | 18 | TEMPERATURE RATING | |
| MORE THAN 100' (30 METERS) | 16 | 35ºC MINIMUM. | |
STEP 5 -- UNIT START-UP
FIGURE 14
8.Recheck voltage while the unit is running. Power must be within range shown on the unit nameplate.
IMPORTANT
If unit is equipped with a crankcase heater, it should be energized 24 hours before unit
1.Rotate fan to check for binding.
2.Inspect all factory- and
3.After evacuation is complete, open the liquid line and suction line service valve stems to release the refrigerant charge (contained in outdoor unit) into the system.
4.Replace the stem caps and tighten to the value listed in table 3.
5.Check voltage supply at the disconnect switch. The voltage must be within the range listed on the unit's nameplate. If not, do not start the equipment until you have consulted with the power company and the voltage condition has been corrected.
6.Connect manifold gauge set for testing and charging using figure NO TAG as a guideline.
7.Set the thermostat for a cooling demand. Turn on power to the indoor indoor unit and close the outdoor unit disconnect switch to start the unit.
9.Check system for sufficient refrigerate using the procedures outlined in under System Refrigerant.
OPERATING MANIFOLD GAUGE SET AND SERVICE VALVES
The liquid and vapor line service valves are used for removing refrigerant, flushing, leak testing, evacuating, checking charge and charging.
Each valve is equipped with a service port which has a
Torque Requirements
When servicing or repairing heating, ventilating, and air conditioning components, ensure the fasteners are appropriately tightened. Table 3 lists torque values for fasteners.
IMPORTANT
To prevent stripping of the various caps used, the appropriately sized wrench should be used and fitted snugly over the cap before tightening.
When servicing or repairing HVAC components, ensure the fasteners are appropriately tightened. Table 3 provides torque values for fasteners.
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