Install Thermostat; Install Optional Equipment Interface Module (Eim) - Honeywell Home Prestige TH9321 System Installation Manual

1

Install thermostat

• 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.
When the THX9321 thermostat is used with the EIM, the relays in the thermostat do not function.
2
Install Equipment Interface Module (if used)
[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.
NOTE: If you install more than one thermostat and
EIM, the EIMs must be at least 2 feet apart.
See pages 10-17 for detailed wiring guidelines
MCR32388
THX9321/9421 Prestige
MCR29241
MCR32386
Strip 1/4" insulation, then insert wires as shown.
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.
3
IAQ and RF EIM
®
MCR32387
MCR32389A
69-2490—07