Typical Control Wiring - Lennox T-Class TPA090S4S Installation Instructions Manual

1 CIRCUIT SIZING AND DISCONNECT SWITCH
MAIN FUSE
BOX/BREAKER
PANEL
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.
5
TYPICAL UNIT LOW VOLTAGE CONNECTIONS
K1 CONTACTOR
CONTROL BOX
B
ROUTE THROUGH WIRE TIES
D
TIGHTEN WIRE TIES
A
RIGHT CUTOUT
WIRE NUTS
C
LOW VOLTAGE CONTROL
WIRING
HIGH VOLTAGE WIRING
EARTH GROUND CONNECTION
2 TYPICAL HIGH VOLTAGE POWER SUPPLY
CONNECTIONS
4

TYPICAL CONTROL WIRING

TPA HEAT
PUMP
R
C1
W1
W2
C
Install low voltage wiring from outdoor to indoor unit and from
thermostat to indoor unit as illustrated.
WIRE RUN LENGTH
LESS THAN 100' (30 METERS)
MORE THAN 100' (30 METERS)
A Run control wires through right cutout.
B Run control wires through wire ties.
C Make control wire connections using field
provided wire nuts.
connections requirements.
D Tighten wire tie to secure 24V low voltage
control wiring.
NOTE — FOR PROPER VOLTAGES, SELECT THERMOSTAT WIRE (CONTROL
WIRES) GAUGE PER TABLE ABOVE.
NOTE — WIRE TIE PROVIDES LOW VOLTAGE WIRE STRAIN RELIEF AND TO MAINTAIN
SEPARATION OF FIELD INSTALLED LOW AND HIGH VOLTAGE CIRCUITS.
NOTE — DO NOT BUNDLE ANY EXCESS 24VAC CONTROL WIRES INSIDE
CONTROL BOX.
Page 6
CONTROL BOX
USE THE LEFT CUTOUT TO ROUTE
HIGH VOLTAGE WIRING TO THE K1
CONTACTOR ON THE TPA 090S AND
120S MODELS.
K1 CONTACTOR
GROUND LUG
LEFT CUTOUT
NOTE — ANY EXCESS HIGH VOLTAGE
FIELD WIRING SHOULD BE TRIMMED
AND SECURED AWAY FROM ANY LOW
VOLTAGE FIELD WIRING.
HIGH VOLTAGE WIRING
CONNECT EARTH GROUND TO
GROUND LUG
TAA AIR
A2
HANDER
THERMOSTAT
RO R
S1
S2
C1 Y1
W
W1
W2
W2
C C
AWG# INSULATION TYPE
18 TEMPERATURE RATING
16 35ºC MINIMUM.
See figure 3 for
RT2 REMOTE
SENSOR