Electrical Connections - Lennox Elite XC13 Installation Instructions Manual

Electrical Connections

In the United States, 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).
TRANSFORMER − 24VAC
Use the transformer provided with the furnace or coil blower
for low-voltage control power (24 − 40VAC minimum)
NOTE − The addition of accessories to the system could
exceed the 40VAC
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
field-provided transformer will need to be installed in the
system.
1
CIRCUIT SIZING AND DISCONNECT SWITCH
MAIN FUSE
BOX/BREAKER
DISCONNECT
SWITCH
Refer to the unit nameplate for minimum circuit ampacity amperage
minimum, and maximum fuse or circuit breaker fusible (HACR per
NEC). Install power wiring and properly sized disconnect switch.
NOTE − Units are approved for use only with copper conductors.
Ground unit at disconnect switch or to an earth ground.
3
INSTALL THERMOSTAT
THERMOSTAT
5 FEET
(1.5M)
Install room thermostat (ordered separately) on an inside wall
approximately in the center of the conditioned area and 5 feet (1.5m)
from the floor. It should not be installed on an outside wall or where it
can be affected by sunlight, drafts or vibrations.
506120−01 03/10
power requirement
capacity, a
PANEL
of the
larger
HIGH VOLTAGE POWER SUPPLY
2
CONNECTIONS
GROUND
NOTE − Any excess high voltage field wiring should be trimmed and
secured away from any low voltage field wiring.
NOTE − To facilitate a conduit, a cutout is located in the bottom of the
control box. Connect conduit to the control box using a proper conduit
fitting.
4 CONTROL WIRING
NOTE − 24VAC, CLASS II CIRCUIT
CONNECTIONS ARE MADE IN THE
CONTROL BOX.
YELLOW
(Y1)
BLACK
(COM)
Install low voltage wiring from outdoor to indoor unit and from
thermostat to indoor unit as illustrated.
NOTE − See figure 30 for additional furnace and blower coil
application diagrams.
Page 18
WARNING
Electric Shock Hazard. Can cause
injury or death.
Line voltage is
components on units with single-pole
contactors, even when unit is not in
operation!
Unit may have
supplies. Disconnect
electric power supplies
opening access panel.
Unit must be grounded in accordance
with national and local codes.
G
OUTDOOR
UNIT
CONTROL BOX
L1
L2
CONDUIT
CUTOUT
CONDUIT
INDOOR UNIT
R
OUTDOOR UNIT
CONTROL BOX
W
COOLING
Y
BLOWER
G
COMMON
C
present at all
multiple power
all remote
before
THERMOSTAT
POWER
R
HEAT
W1
Y
INDOOR
G
C