Lennox International Inc LENNOX Elite Series XP13 Units HEAT PUMPS Unit Start−Up, Unit START−UP

Figure 15. Typical Factory Wiring

Unit Start−Up

have consulted with the power company and the voltage condition has been corrected.

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

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 16 to determine next step in system preparation.

OPEN BOTH VAPOR AND LIQUID SERVICE
	VALVE STEMS TO RELEASE
REFRIGERANT FROM OUTDOOR UNIT TO
	SYSTEM.
NO	PRESENT	YES
GO TO SERVICE AND WEIGH
IN REFRIGERANT CHARGE		GO TO OPTIMIZING SYSTEM
FOR OUTDOOR UNITS		REFRIGERANT CHARGE ON
DELIVERED VOID OF CHARGE		PAGE 24.
ON PAGE 22.

Figure 16. Outdoor Unit Factory Charge

Page 21

XP13 SERIES