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Figure 15. Typical Factory Wiring Diagram
Servicing Units Delivered Void of Charge
If the outdoor unit is void of refrigerant, clean the system
using the procedure described below.
1. Leak check system using procedure outlined on page
14.
2. Evacuate the system using procedure outlined on
page 15.
3. Use nitrogen to break the vacuum and install a new
filter drier in the system.
4. Evacuate the system again using procedure outlined
5. Weigh in refrigerant using procedure outlined under
Unit Start-Up
IMPORTANT
If unit is equipped with a crankcase heater, it should be
energized 24 hours before unit start-up to prevent
compressor damage as a result of slugging.
1. Check that fan rotates freely.
2. Inspect all factory- and field-installed wiring for loose
connections.
3. Open the liquid line and suction line service valve
stems (
Operating Service Valves
on page 3) to
release the refrigerant charge (contained in outdoor
unit) into the system.
4. Replace the valve stem caps and tighten as specified
in
Operating Service Valves
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. 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.
7. Recheck voltage while the unit is running. Power must
be within range shown on the unit nameplate.
8. Check system for sufficient refrigerate using the
procedures outlined in under
System Refrigerant
.
System Refrigerant
This section outlines procedures for:
1. Checking and adjusting indoor airflow as
recommended in figure 18.
2. Determine the best method for adding or removing
