Start−Up Procedure; Testing Charge - Lennox Elite XC13 Installation Instructions Manual

Start−Up Procedure
Use the following procedure prior to starting up the unit for
the first time.
1. Rotate fan to check for binding.
2. Inspect all factory− and field−installed wiring for loose
connections.
3. Open the liquid line and suction line service valves to
release the refrigerant charge (contained in outdoor
unit) into the system.
4. Replace the stem caps and secure finger tight, then
tighten an additional one-sixth (1/6) of a turn as
illustrated in figure 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
Testing Charge Procedure
A Close manifold gauge set valves and connect the center hose to an upright cylinder of HFC−410A.
B Connect the manifold gauge set's low pressure side to the suction line service port.
C Connect the manifold gauge set's high pressure side to the liquid line service port.
D Position temperature sensor on liquid line near liquid line service port.
TEMPERATURE
SENSOR
D
QC RESTRICTOR
FITTING
A
REFRIGERANT
TANK
CHARGING SYSTEM
Figure 32. Connecting Gauge Set for Testing and Charging
have consulted the power company and the voltage
condition has been corrected.
If unit is equipped with a crankcase heater and the
outdoor ambient air is 50ºF (10ºC) or below, it should
be energized 24 hours before unit start−up to
prevent compressor damage as a result of slugging.
6. Set the thermostat for a cooling demand. Turn on
power to the indoor blower 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 nameplate.
8. Check system for sufficient refrigerate using the
procedures outlined in Charging System on page .
MANIFOLD
GAUGE SET
TO SUCTION
SERVICE VALVE
TEMPERATURE SENSOR
(LIQUID LINE)
Page 21
IMPORTANT
B
OUTDOOR UNIT
C
TO LIQUID
LINE SERVICE
VALVE
XC13 SERIES