Lennox HP40, Installation Instructions Manual

Page: 4 / 16

Page 4
Electrical
Wiring must conform with current local codes. An applica-
tion diagram is included in this instruction and in the indoor
unit instructions.
Refer to the unit rating plate, located on the control box cov-
er, for minimum circuit ampacity and maximum fuse size.
1 − Provide line voltage power supply to the unit from a
properly sized disconnect switch. The disconnect
switch should be located so that it is easily accessible
and within sight of the unit.
2 − Route the power and ground wires from the discon-
nect switch to the unit. The electrical openings are
provided under the control box cover. See the unit di-
mensions illustration on page 2.
3 − Remove the control box cover and connect the power
wiring to the contactor. Connect ground wire to ground
lug.
4 − Install the room thermostat (ordered separately) in
the conditioned area. Place the thermostat where it
will not be affected by sunlight, drafts, or vibration. Do
not install the thermostat on an outside wall. The most
desirable position for the thermostat is near the cen-
ter of the conditioned area and approximately 1.5 m
from the floor.
5 − Route 24VAC control wires from the thermostat to the
indoor unit and from the indoor unit to the defrost con-
trol terminals in the outdoor unit as shown in figure 4.
FIELD WIRING DIAGRAM FOR HP40 UNIT
W2
C
W1
G
O
Y1
S1 THERMOSTAT
1
LOW VOLTAGE
FIELD INSTALLED
1
EMERGENCY HEAT RELAY (USED ONLY
IF OUTDOOR THERMOSTAT IS USED)
FIELD PROVIDED AND INSTALLED NEAR
INDOOR UNIT 24VAC 5VA MAX NEC
CLASS 2.
2
NOTE−ALL REMAINING WIRES FACTORY INSTALLED
3
HP40
LOW VOLTAGE
TERMINAL
CONNECTIONS
THERMOSTAT HEAT ANTICIPATION SET-
TING .4 AMP ELECTRIC HEAT FOR THER-
MOSTATS WITH ADJUSTABLE ANTICI-
PATORS.
IF OUTDOOR THERMOSTAT IS USED, RE-
MOVE JUMPER BETWEEN TERMINALS R"
AND W2."
R
Y2
E
COMMON
BEIGE (ELECTRIC HEA
T)
ORANGE
YELLOW (COMPRESSOR)
RED (POWER)
TB1 TERMINAL STRIP
(INDOOR UNIT CONTROL BOX)
C
G
W1
W2
W3
R
S23
EM HEA
T
RELA
Y
K26
OUTDOOR
THERMOSTAT
(IF USED)
2
3
R
C
O
W1
Y1
REVERSINNG V
A
LV
E
FIGURE 4