548267-YIM-C-0211
12
Unitary Products Group
Control Wiring
1.
Run low voltage control circuit wires through the “fingered”
snap bushing into the low voltage compartment.
2.
Run low voltage control circuit wires through the fingered
snap bushing to the low voltage terminal wire. Refer to
Figure 11 diagram to connect the low voltage control wiring
to the units low voltage connections.
3.
If using auxiliary electric heat, refer to the wiring
instructions provided with the heating kit.
Figure 10: Unit Component Location
Figure 11: Thermostat Wiring
Wall Thermostat Installation
General recommendations for the location of the thermostat are
as follows:
The proper location of the room thermostat is most important to
insure that it will provide a comfortable home temperature.
Observe the following general rules when selecting a location:
1.
Locate thermostat about 5 feet above floor.
2.
Install on a partitioning wall, not on an outside wall.
3.
Never expose it to direct light from lamps, sun, fireplaces,
etc.
4.
Avoid locations close to doors that lead outside, to
windows or to adjoining outside walls.
5.
Avoid locations close to radiators, warm air registers, or in
the direct path of heat or cold air from them.
6.
Make sure that there are no pipes or ductwork in that part
of the wall chosen for thermostat location.
7.
Never locate it in a room that is warmer or cooler than the
rest of the home, such as a kitchen or hallway.
8.
The living or dining room is normally a good location
provided there is no cooking range or refrigerator on the
opposite side of wall.
Make final check of complete electrical system for correct
wiring. Check for any possible loose connections.
Defrost
Board
Run
Capacitor
Start Relay
(Optional)
Transformer
Contactor
Ground Lug
Low Voltage Box
Start Capacitor
(Optional)
Components
for Optional
Heater Kit
W1 or 66
CC
W
C or B
X or L
R
O
G
Y
E
R
L
X
W2
B
THERMOSTAT
Y
BLOWER SPEED
TAP
O
PKG.
HEAT
PUMP
ORG
YEL
RED
PUR
BRN
BRN
WHT
R
U
P
D
E
R
L
E
Y
G
R
O
GRN
GRN
WHT
If installing this heat pump system in conjunction with a
gas furnace, a baffle must be installed in the furnace to
prevent cold air from being discharged around the heat
exchanger. This could damage the heat exchanger and
cause asphxiation. A sheet metal plate may be inserted
in the supply outlet duct of the furnace to serve as a
baffle.
Advise the homeowner that the baffle plate
must be removed before attempting to operate the
interior furnace.
A thermostat interlock system must be provided to
prevent simultaneous operation of any furnace with the
heat pump. If a furnace will be in the home, a separate
furnace thermostat must be used and an interlock switch
(See Figure 12) must be installed in both thermostat
circuits, insuring only one thermostat can be operated at
a time. This switch must break the control circuit of any
furnace used.
