Power Options; Wiring Terminal Designations - Honeywell Pro 3000 Series Installation Instructions Manual

Power options

Keep wires in this
shaded
area
TH3110D Terminal block
shown

Wiring terminal designations

W Y G O Rc R
TH3110D
C 24 Vac common. For 2 transformer
systems, use common wire from cooling
transformer.
B Changeover valve energized in heating
R 24 Vac power from heating transformer
Rc 24 Vac power from cooling
transformer
O Changeover valve energized in cooling
G Fan relay
Y Compressor contactor
W Heat relay
Remove factory-
installed jumper only
for two-transformer
systems.
Connect C for primary AC power
(optional if batteries are installed).
B C
Insert batteries for primary
or backup power
Aux Y G O
TH3210D
C 24 Vac common
B Changeover valve energized in heating
R 24 Vac power
L Sends output when set to Em. Heat
O Changeover valve energized in cooling
G Fan relay
Y Compressor contactor
Aux Auxiliary heat relay
E Emergency heat relay
2
L R B C