Wiring Connections - Lennox Elite Series Installation Instructions Manual

7, Shut off the dry nitrogen cylinder and remove the
manifold gauge hose from the cylinder. Open the
manifold gauge valves to release the dry nitrogen from
the line set and indoor unit,
8, Reconnect the manifold gauge to the vacuum pump,
turn the pump on, and continue to evacuate the line set
and indoor unit until the absolute pressure does not
rise above 500 microns (29.9 inches of mercury) within
a 20-minute period after shutting off the vacuum pump
and closing the manifold gauge valves.
9, When the absolute pressure requirement above has
been met, disconnect the manifold hose from the
vacuum pump and connect it to an upright cylinder d
HFC-410A refrigerant, Open the manifold gauge valve
1 to 2 psig in order to release the vacuum in the line set
and indoor unit,
10. Close manifold gauge valves and shut off the
HFC-410A cylinder and remove the manifold gauge
set,
If the system is void of refrigerant, clean the system using
the procedure described below,
1, Use nitrogen to pressurize the system and check for
leaks. Repair all leaks,
2, Evacuate the system to remove as much of the
moisture as possible,
3. Use nitrogen to break the vacuum and install a new
filter drier in the system.
4, Evacuate the system again. Then, weigh the
appropriate amount of HFC-410A refrigerant as listed
on unit nameplate into the system.
5, Monitor the system to determine the amount of
moisture remaining in the oil. It may be necessary to
replace the filter drier several times to achieve the
required dryness level. If system dryness is not
verified, the compressor will fail in the future.
In the U,S.A., wiring must conform with current local codes
and the current National Electric Code (NEC). In Canada,
wiring must conform with current local codes and the current
Canadian Electrical Code (CEC),
Refer to the furnace or blower coil installation instructions
for additional wiring application diagrams and refer to unit
nameplate for minimum circuit ampacity and maximum
overcurrent protection size,
230VAC SUPPLY VOLTAGE
The XP16 outdoor unit is rated for 230VAC applications
only, A hard-start kit is required for applications where the
supply voltage is less than 230VAC,
24VAC TRANSFORMER
Use the transformer provided with the furnace or coil
blower for low-voltage control power (24VAC - 40 VA
minimum)
NOTE - The addition of accessories to the system could
exceed the 40 VA power requirement of the
factory-provided transformer, Measure the system's
current and voltage after installation is complete to
determine transformer loading. If loading exceeds the
factory-provided transformer capacity, a larger
field-provided transformer will need to be installed in the
system.
_WARNING
WIRING CONNECTIONS
1, Install line voltage power supply to unit from a properly
sized disconnect switch.
2, Ground unit at unit disconnect switch or to an earth
ground.
NOTE - Connect conduit to the unit using a proper conduit
fitting. Units are approved for use only with copper
conductors. See figure 28 for high voltage field wiring
diagram. A complete unit wiring diagram is located on the
back side of the unit's access panel.
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208 =
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LINE VOLTAGE
FIELD INSTALLED
z_ NOTE-
FOR USE WITH COPPER CONDUCTORS ONLY, REFER TO UNIT RATING PLATE FOR
MINZMUM CZRCUIT AMPACITY AN0 MAXIMUM 0VER-CURRENT PROTECTION SIZE
Figure 28. Outdoor Unit Typical Field Wiring
NOTE - For proper voltages, select thermostat wire
gauge per the following chart:
Table 3. Wire Run Length
Wire run length AWG # Insulation type
less than 100' (30m) 18 color-coded, temperature
more than 100' (30m) 16 rating 35°C minimum
3, 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,
NOTE -Thermostat should not be installed on an outside
wall or where it can be effected by sunlight, drafts or
vibrations,
4. Install low voltage wiring from outdoor to indoor unit
and from thermostat to indoor unit (figures 29 and 30),
NOTE - 24VAC, Class II circuit connections are made in
the low voltage junction box,
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