69-1591–1
3
ELECTRONIC HEAT PUMP THERMOSTAT
Pub. No. 11-HD28D2-1
Fig. 4. Correct wiring technique.
Mounting Thermostat
1. Engage tabs at the top of the thermostat and
wallplate. See Fig. 5.
2. Press lower edge of case to close and latch.
M4826
FOR WRAPAROUND
INSERTION STRIP
7/16 IN. (11 MM).
FOR STRAIGHT
INSERTION STRIP
5/16 IN. (8 MM).
WIRING
All wiring must comply with local electrical codes and
ordinances. Refer to Fig. 3 for typical hookup. A letter code
is located near each terminal for identification.
COMPRESSOR
CONTACTOR 2
M20273A
W
L1
L2
FAN
SWITCHOVER
VALVE
Y1
Y2
X2
THERMOSTAT
B
R
O
COMPRESSOR
CONTACTOR 1
EM. HT.
RELAY
TRANSFORMER
OT
OT
OUTDOOR
TEMPERATURE
SENSOR
TAYSENS100A
G
F
DEFROST
CONTROLLER
1
1
2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2 FEATURE NOT AVAILABLE ON ALL SYSTEMS.
3 USE OUTDOOR TEMPERATURE SENSOR TAYSENS200A AND CONFIGURE
INSTALLER SETUP NUMBERS 24 TO 1.
3
AUX.
HEAT
RELAY
BLUE
YELLOW
BROWN
GREEN
ORANGE
BLACK
WHITE
RED
Fig. 3. Typical hookup in heat pump system with emergency heat relay.
CAUTION
Electrical Shock or Equipment Damage Hazard.
Can shock individuals or short equipment
circuitry.
Disconnect power supply before installation.
1. Loosen the terminal screws on the wallplate and
connect the system wires. See Fig. 4.
IMPORTANT
Use 18 gauge, color-coded thermostat cable for
proper wiring.
2. Securely tighten each terminal screw.
3. Push excess wire back into the hole.
4. Plug the hole with nonflammable insulation to
prevent drafts from affecting the thermostat.
Fig. 5. Mounting thermostat on wallplate.
NOTE:
To remove the thermostat from the wall, first
pull out at the bottom of the thermostat; then
remove top.
M6798A
B.
PRESS LOWER EDGE OF CASE TO LATCH.
A.
ENGAGE TABS AT TOP OF THERMOSTAT AND WALLPLATE.
