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THX9321 PRESTIGE
®
2.0 AND THX9421 PRESTIGE
®
IAQ 2.0 WITH EIM
111 68-0311—01
Fig. 222. Wood stove-fired hot water fan coil with forced air
furnace backup heat.
Fig. 223. Hot water radiant heat with backup heat (single
zone application).
W
W2
W3
W
Y
G
R
C
CONFIGURE THE THERMOSTAT TO ENERGIZE THE FAN
WITH A CALL FOR HEAT.
THE THERMOSTAT WILL ENERGIZE ONLY THE FAN WITH
A CALL FOR STAGE 1 HEAT. IF THE WOOD STOVE IS HOT,
HEAT COMES FROM THE FAN COIL. IF THE WOOD STOVE
IS COLD, ONLY THE FAN RUNS. THE THERMOSTAT WILL
UPSTAGE TO THE FURNACE AS NEEDED TO MAINTAIN
THE TEMPERATURE.
L
TO THERMOSTAT
THERMOSTAT/EIM
CONV
FURNACE
M31482
1
2
1
2
W
W2
W3
W
Y
G
R
C
THE BOILER IS CONTROLLING THE CIRCULATOR PUMP
IN THIS DIAGRAM.
L
TO THERMOSTAT
THERMOSTAT/EIM
CONV
FURNACE
M31483
1
1
BOILER
T
T
RELAY
3
1