THX9321/9421 Prestige
®
IAQ and RF EIM
3
69-2490—05
MCR29241
MCR32386
Install thermostat
1
•
THX9421:
Mount the thermostat and wire to C and R terminals of the
Equipment Interface Module (EIM), or to a separate 24 volt transformer (not
provided).
•
THX9321:
Install and wire as above if using EIM. If not, see pages 13-15.
See pages 10-17 for detailed wiring guidelines
MCR32387
MCR32389A
R
C
Y
Y2
G
W
O/
B
W2
AUX1
W3
AUX2
A L/A
Strip 1/4” insulation, then insert wires as shown.
Install Equipment Interface Module (if used)
2
[If no EIM is used, skip to Section 3.]
Use screws & anchors as appropriate for the mounting surface. Mount the EIM
near the HVAC equipment, or on the equipment itself.
MCR32388
NOTE: If you install more than one thermostat and
EIM, the EIMs must be at least 2 feet apart.
If you are installing discharge and return air
sensors, refer to the mounting instructions in
the Alerts and Delta T Diagnostics Installation
Instructions packed with the Prestige IAQ 2.0 kit.
When the THX9321 thermostat is used with the EIM, the relays in the thermostat do not function.
