THX9321 PRESTIGE
®
2.0 AND THX9421 PRESTIGE
®
IAQ WITH EIM
137
68-0311—02
Fig. 317. Inserting wires in thermostat terminal block.
Fig. 318. Inserting wires in EIM terminal block
IMPORTANT
Use 18–22 gauge thermostat wire.
Table 15. Wiring Diagrams by System Type.
System Type
Wiring Diagram
Reference
Standard Heat/Cool
Heat Pump with Auxiliary Heat
Geothermal radiant heat
Heat pump system with one transformer
2-heat / 2-cool conventional system with
one transformer
Heat pump system with two transformers 324
Geothermal radiant heat, geothermal
forced-air and backup heat with one
transformer
Heat pump with oil forced air backup.
Geothermal radiant heat with geothermal
forced air and backup heat using separate
transformer for the radiant heat
Wood stove-fired hot water fan coil with
forced air furnace backup heat
Hot water radiant heat with backup heat
(single zone application)
Hot water radiant heat with backup forced
air heat. Zoned with forced air zone panel
and zone valves
Hot water radiant heat with backup forced
air heat. Zoned with forced air zone panel
and hot water panel.
Hot water fan coil with forced air furnace
backup heat.
Wood stove with heat pump and backup
electric strips. (For applications in which
the thermostat only needs to run the
blower fan when stove is hot).
IAQ Equipment
Wired Remote Sensors
Table 16. Zoning Diagrams by System Type.
System Type
Wiring Diagram
Reference
Prestige IAQ thermostats with an HZ432
zone panel and no IAQ control
Prestige IAQ controlling one zone with an
HZ432 zone panel and a TrueSTEAM
humidifier
Ventilation with zoning
Prestige IAQ with an HZ432 zone panel
and a TrueDRY dehumidifier
Wallplate
R
C
Y
Y2
G
W
O/B
W2
AUX1
W3
AUX2
A L/A