Wiring - Honeywell Digital Round T8775A Product Data

T8775A,C THE DIGITAL ROUND
4. Tap the provided wall anchors into the drilled holes until
they are flush with the wall.
5. Pull the thermostat wires through the wiring hole on the
wallplate and reposition the wallplate over the wall
anchors.
6. Attach the wallplate to the wall with the screws pro-
vided.
7. After wiring the wallplate, plug the hole to prevent drafts
from affecting the thermostat; see Wiring section.

WIRING

IMPORTANT
Use 18-gauge wire to wire the T8775A,C
Thermostats.
All wiring must comply with local electrical codes and
ordinances. Disconnect the power supply to prevent electrical
shock or equipment damage.
NOTE: To ensure proper mounting of thermostat, restrict all
wiring to the shaded area. See Fig. 5.
WIRING
HOLE
Fig. 5. Restrict T8775 wiring to shaded area.
The shape of the terminals permits insertion of straight or
wraparound wiring connections; either method is acceptable.
See Fig. 6.
Fig. 6. T8775 wiring connections.
68-0279
™
NON-PROGRAMMABLE THERMOSTATS
MOUNTING
HOLES
RESTRICT WIRING
TO SHADED AREA
M19680
FOR STRAIGHT INSERTION
STRIP 5/16 IN. (8 MM).
FOR WRAPAROUND
INSERTION STRIP
7/16 IN. (11 MM).
M19496
Refer to Fig. 7 through 11 for typical wiring diagrams.
1
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
Fig. 7. Typical hookup of T8775A in a heat-only system.
1
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
2 FACTORY INSTALLED JUMPER.
Fig. 8. Typical hookup of T8775C in heat-only system with
2
R
1
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS
AND OVERLOAD PROTECTION AS REQUIRED.
2 FACTORY INSTALLED JUMPER.
Fig. 9. Typical hookup of T8775C in heat-cool system with
4
R
W
HEATING
RELAY OR
VALVE COIL
M19513
O
B
Rc
2
G
Y
R
W
HEATING
FAN
RELAY OR
RELAY
VALVE COIL
M19514
fan.
O
B
Rc
G
Y
W
HEATING COMPRESSOR
RELAY OR CONTACTOR
VALVE COIL
single transformer.
FAN
RELAY
M19515