Install Thermostat - Honeywell PRESTIGE THX9321 System Installation Manual

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.
When used with the EIM, the relays in the thermostat do not function.
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.
NOTE: If you install more than one thermostat and
EIM, the EIMs must be at least 2 feet apart.
69-2490_B.indd 3
MCR29241
MCR32386
See pages 10-17 for detailed wiring guidelines
MCR32388
THX9321/9421 Prestige
Strip 1/4" insulation, then insert wires as shown.
If installing a discharge/return air sensor, it must
be located between the IAQ equipment and the
heating/cooling equipment. The sensors must be
in air that is mixed well (away from a-coil/heat
exchanger). See page 7.
3
IAQ and RF EIM
®
MCR32387
MCR32389
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