Wiring; Equipment Interface Module Terminal Designation Descriptions - Honeywell THX9321 Prestige 2.0 Product Data

WIRING

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