Honeywell PRESTIGE THX9321 - Manual (Page 135)

THX9321 PRESTIGE ® 2.0 AND THX9421 PRESTIGE ® IAQ WITH EIM
135 68-0311—02
WIRING
See Table 13 for Equipment Interface Module terminal descriptions and Table 14 for thermostat terminal descriptions.
* Remove jumpers when separate transformers are used.
† See “Wiring IAQ Equipment or a Heat/Cool Stage to the Universal Terminals” beginning on page 149 or “Wiring IAQ Equipment or
a Heat/Cool Stage to the Universal Terminals” beginning on page 149.
‡ See “Dry Contact Alerts” beginning on page 95 for wiring Dry Contact Devices to display alerts.
Table 13. Equipment Interface Module Terminal Designation Descriptions.
Conventional System Heat Pump
Terminal Description Terminal Description
C Common wire from 24 VAC transformer. C Common wire from 24 VAC transformer.
R* Power wire from 24 VAC transformer. R Power wire from 24 VAC transformer.
RH* Heating power RH Heating power
RC* Cooling power RC Cooling power
W Heat Stage 1 O/B Changeover valve for heat pumps
W2 Heat Stage 2 AUX 1 Backup Heat Stage 1/Emergency Heat Stage 1
W3 Heat Stage 3 AUX 2 Backup Heat Stage 2/Emergency Heat Stage 2
Y Compressor Stage 1 Y Compressor Stage 1
Y2 Compressor Stage 2 Y2 Compressor Stage 2
G Fan Relay G Fan Relay
A Connect to Economizer Module or Lighting Panel
(TOD).
L/A Connect to Compressor Monitor, Zone Panel,
Economizer Module or Lighting Panel (TOD).
U1 / U1 †
U2 / U2 †
U3 / U3 †
Universal relay for humidification,
dehumidification, ventilation, or a stage of
heating/cooling. U terminals are dry contacts that
require power.
U1 / U1 †
U2 / U2 †
U3 / U3 †
Universal relay for humidification,
dehumidification, ventilation, or a stage of
heating/cooling. U terminals are dry contacts that
require power.
S1 / S1 ‡
S2 / S2 ‡
S3 / S3 ‡
S4 / S4 ‡
Universal input for a wired indoor sensor, outdoor
sensor, discharge sensor, return sensor, dry
contact device for alerts or dry contact device for
remote setback.
S1 / S1 ‡
S2 / S2 ‡
S3 / S3 ‡
S4 / S4 ‡
Universal input for a wired indoor sensor, outdoor
sensor, discharge sensor, return sensor, dry
contact device for alerts or dry contact device for
remote setback.
A
B
C
D
Connect to THM4000R1000 Wireless Adapter for
extended wireless range.
A
B
C
D
Connect to THM4000R1000 Wireless Adapter for
extended wireless range.