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XC16 SERIES
HIGH PRESSURE
SWITCH (S4)
LOW PRESSURE
SWITCH (S87)
CRANKCASE
THERMOSTAT
(S40)
CRANKCASE
HEATER (HR1)
COMPRES-
SOR (B1)
DUAL RUN CAPACI-
TOR (C12)
FAN MOTOR (B4)
CONTACTOR
K1
GROUND
LUG
Figure 14. 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
17.
2. Evacuate the system using procedure outlined on
page 18.
3. Use nitrogen to break the vacuum and install a new
filter drier in the system.
4. Evacuate the system again using procedure outlined
on page 18.
5. Weigh in refrigerant using procedure outlined in figure
18.
6. Monitor the system to determine the amount of
moisture remaining in the oil. It may be necessary to
replace the filter drier several times to achieve the
required dryness level. If system dryness is not
verified, the compressor will fail in the future.
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. Rotate fan to check for binding.
2. Inspect all factory− and field−installed wiring for loose
connections.
3. After evacuation is complete, open both the liquid and
vapor line service valves 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 1.
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.