Unit Start−Up - Lennox Elite XP16−024−230 Installation Instructions Manual

Figure 18. Typical Factory Wiring Diagram (No Field Modifications)
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 21. Use a temperature sensor
positioned near the liquid line service port as illustrated
in figure 21 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
have consulted with the power company and the
voltage condition has been corrected.
6. Open both the liquid and vapor line service valves to
release the refrigerant charge contained in outdoor
unit into the system.
7. Use figure 19 to determine next step in system
preparation.
OPEN BOTH VAPOR AND LIQUID SERVICE
VALVE STEMS TO RELEASE
REFRIGERANT FROM OUTDOOR UNIT TO
NO
GO TO SERVICE AND WEIGH
IN REFRIGERANT CHARGE
FOR OUTDOOR UNITS
DELIVERED VOID OF CHARGE
ON PAGE 24.
Figure 19. Outdoor Unit Factory Charge
Page 23
SYSTEM.
REFRIGERANT
YES
PRESENT
GO TO OPTIMIZING SYSTEM
REFRIGERANT CHARGE ON
PAGE 26.
XP16 SERIES