Electrical Connections - Lennox Elite Series XP13 Units Installation Instructions Manual

Electrical
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.
1. Install line voltage power supply to unit from a properly
sized unit disconnect switch.
2. Ground the unit at the unit disconnect switch or to
earth ground.
NOTE − To facilitate conduit, a hole is provided in the
bottom of the control box. Connect conduit to the control
box using a proper conduit fitting.
WARNING
Electric Shock Hazard. Can cause
injury
grounded in accordance with national
and local codes.
Line voltage
components when unit is not in
operation on units with single-pole
contactors. Disconnect all remote
electric
opening access panel. Unit may have
multiple power supplies.
Wire run length
less than 100' (30m)
more than 100' (30m)
NOTE − Units are approved for use only with copper
conductors. Refer to figure 29 for high voltage field wiring
diagram. (A complete unit wiring diagram is located inside
the unit control box cover.)
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. It
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. See figures 30 and
31. ( 24V, Class II circuit connections are made in the
low voltage junction box.)
NOTE − For proper voltages, select thermostat wire gauge
per the following chart:
or death. Unit must
is present
power supplies
AWG # Insulation type
18
color−coded, temperature
º
rating 35 C minimum
16
WARNING! − ELECTRIC SHOCK HAZARD. Can cause INJU-
RY 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.
THERMOSTAT
R
C
W1
be
at all
G
O
before
Y1
Figure 30. Outdoor and Blower Unit Thermostat
THERMOSTAT
R
24V POWER
C
COMMON
E
EMERGENCY
W1
1ST-STAGE
AUXILIARY
G
INDOOR BLOWER
O
REVERSING VALVE
Y1
COMPRESSOR
Figure 31. Outdoor and Blower Unit Thermostat
Designations (with emergency heat)
Page 17
Figure 29. Typical Field Wiring
INDOOR UNIT
R
24V POWER
C
COMMON
W1
1ST-STAGE
AUXILIARY
W2
HEAT
W3
G
INDOOR BLOWER
REVERSING VALVE
COMPRESSOR
(SOME CONNECTIONS MAY NOT APPLY. REFER
TO SPECIFIC THERMOSTAT AND INDOOR UNIT.)
Designations
INDOOR UNIT
R
24V POWER
C
COMMON
HEAT
W1
1ST-STAGE
AUXILIARY
W2
HEAT
HEAT
W3
G
(SOME CONNECTIONS MAY NOT APPLY. REFER TO
SPECIFIC THERMOSTAT AND INDOOR UNIT.)
OUTDOOR UNIT
R
24V POWER
C
COMMON
W1
1ST-STAGE
AUXILIARY
HEAT
O
Y1
OUTDOOR UNIT
R
C
EMERGENCY
HEAT RELAY
OUTDOOR
THERMOSTAT
W1
O
Y1
XP13 SERIES