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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.
UNIT START−UP
1. Rotate fan to check for binding.
2. Inspect all factory− and field−installed wiring for loose
connections.
3. Verify that the manifold gauge set is connected as
illustrated in figure 17. Use a temperature sensor
positioned near the liquid line service port as illustrated
in figure 17 which will be required later when using the
subcooling method for optimizing the system
refrigerant charge.
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
Figure 15. Typical Factory Wiring
6. Open both the liquid and vapor line service valves to
7. Use figure 16 to determine next step in system
DELIVERED VOID OF CHARGE
Page 21
have consulted with the power company and the
voltage condition has been corrected.
release the refrigerant charge contained in outdoor
unit into the system.
preparation.
OPEN BOTH VAPOR AND LIQUID SERVICE
VALVE STEMS TO RELEASE
REFRIGERANT FROM OUTDOOR UNIT TO
SYSTEM.
REFRIGERANT
NO
PRESENT
GO TO SERVICE AND WEIGH
IN REFRIGERANT CHARGE
FOR OUTDOOR UNITS
ON PAGE 22.
Figure 16. Outdoor Unit Factory Charge
YES
GO TO OPTIMIZING SYSTEM
REFRIGERANT CHARGE ON
PAGE 24.
XP13 SERIES
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