Honeywell TH5110D ユーザーズマニュアル

3

69-1712—1

All wiring must comply with local electrical codes and 
ordinances. Refer to Table 2 for descriptions of terminal 
designations.  See Fig. 6-13 for wiring diagrams for 
specific equipment applications.

Electrical Hazard.
Can cause electrical shock or equipment 
damage.
Disconnect power before wiring.

1. Loosen the screw terminals that are used for the 

application. Insert the wires into the terminal block 
and tighten each screw terminal. See Fig. 4.

2. Push excess wire back into the wall opening and 

restrict wires to the shaded area.  See Fig. 5.

3. Plug the wall opening with nonflammable insulation 

to prevent drafts from affecting the thermostat.

NOTES:

1.

When used in a single-transformer system, leave metal jumper in place between Rc and R. If used on a 
two-transformer system, remove metal jumper between Rc and R.

2.

Common wire is optional when thermostat is used with batteries.

3.

If thermostat is configured for a heat pump in the Installer Setup, configure changeover valve 
for cool (O-factory setting) or heat (B).

G

O/B W

Y

C

R

M22141

R

C

G

W/O/B

Y

R

RC

WALLPLATE

SCREW TERMINALS

TERMINAL BLOCK

WIRES

LETTER

DESIGNATIONS

WALLPLATE

M22142

SHADED AREA

WIRE

G

 W

Y

C

R

Rc

WALL OPENING

(O/B)

Rc (see Note 1)

Power for cooling—connect to secondary side of cooling system transformer

R (see Note 1)

Power for heating—connect to secondary side of heating system transformer

Y

Compressor contactor

C (see Note 2)

Common wire from secondary side of cooling system transformer

O/B W (see Note 3)

Heat relay or changeover valve terminal for heat pumps

G

Fan  relay