Start−Up, Testing And Charging Procedures - Lennox Elite XC16 Installation Instructions Manual

WIRING CONNECTIONS
1. Install line voltage power supply to unit from a properly
sized disconnect switch. Any excess high voltage field
wiring should be trimmed or secured away from the
low voltage field wiring as illustrated in figure 2.
WIRE TIES
GROMMET
Figure 2. Separating High/Low Voltage
(Typical Field Wiring)
NOTE − To facilitate conduit, a hole is located in the
bottom of the control box.
WARNING! − ELECTRIC SHOCK HAZARD. CAN CAUSE INJURY OR DEATH.
UNIT MUST BE GROUNDED IN ACCORDANCE WITH NATIONAL AND
LOCAL CODES.
NOTE − FOR USE WITH COPPER CONDUCTORS ONLY. REFER TO UNIT
RATING PLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM
OVER-CURRENT PROTECTION SIZE.
NOTE − HARD START KIT (INCLUDES OPTIONAL COMPONENTS SHOWN)
IS REQUIRED IN APPLICATIONS WHERE SUPPLY VOLTAGE IS LESS THAN
230 VOLTS.
Figure 3. Typical Field Wiring Diagram
2. Ground unit at unit disconnect switch or to an earth
ground.
3. Connect conduit to the unit using provided conduit
bushing.
NOTE − Units are approved for use only with copper
conductors. 24VAC, Class II circuit connections are
made in the low voltage junction box. See figure 3 for
field wiring and figure 1 on page 15 for typical wiring. A
complete unit wiring diagram is located inside the unit
control box cover.
4. Install room thermostat (ordered separately) on an
inside wall approximately in the center of the
conditioned area and 5 feet (1.5 m) from the floor. It
should not be installed on an outside wall or where it
can be affected by sunlight, drafts or vibrations.
5. For proper voltages, select thermostat wire gauge per
the following chart:
506101−01 07/09
Wire run length
less than 100' (30m)
more than 100' (30m)
6. Install low−voltage wiring from outdoor to indoor unit
and from thermostat to indoor unit.
7. Do not bundle any excess 24V control wire inside
HIGH VOLTAGE
FIELD WIRING
control box. Run control wire through installed wire tie
LOW VOLTAGE
and tighten wire tie to provided low voltage strain relief
FIELD WIRING
and to maintain separation of field installed low and
FACTORY
WIRING
high voltage circuits as illustrated in figure 2 on page
16.
Start−Up, Testing and Charging
Procedures
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.
GROUND
2. Inspect all factory− and field−installed wiring for loose
connections.
3. After evacuation is complete, 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.
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
230 / 60 / 1
have consulted the power company and the voltage
condition has been corrected.
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 by using the
procedures listed under this section.
SETTING UP TO CHECK CHARGE
1. Close manifold gauge set valves. Connect the center
manifold hose to an upright cylinder of HFC−410A.
2. Connect the manifold gauge set to the unit's service
ports as illustrated in figure 27.
D
D
INDOOR COIL AIRFLOW CHECK
Check indoor coil airflow using the Delta−T (
as illustration in figure 28.
DETERMINING CHARGE METHOD
To determine the correct charging method, use the
illustration in figure 29.
Page 16
Table 1. Wire Run Lengths
AWG #
18
16
IMPORTANT
low pressure gauge to suction line service port.
high pressure gauge to liquid line service port.
Insulation type
color−coded, temperature
º
rating 35 C minimum
DT)
process