Wiring - Honeywell Prestige 2.0 THX9421 Manual

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THX9321 PRESTIGE 2.0 AND THX9421 PRESTIGE

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
†
U3 / U3
that require power.
‡ Universal input for a wired indoor sensor,
S1 / S1
outdoor sensor, discharge sensor, return
‡
S2 / S2
sensor, dry contact device for alerts or dry
‡
S3 / S3
contact device for remote setback.
‡
S4 / S4
A Connect to THM4000R1000 Wireless Adapter
B for 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 152 or "Wiring IAQ
Equipment or a Heat/Cool Stage to the Universal Terminals" beginning on page 152.
‡
See "Dry Contact Alerts" beginning on page 94 for wiring Dry Contact Devices to display alerts.
68-0311—07
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IAQ WITH EIM
Description
138
Heat Pump
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
†
U3 / U3
that require power.
‡ Universal input for a wired indoor sensor,
S1 / S1
outdoor sensor, discharge sensor, return
‡
S2 / S2
sensor, dry contact device for alerts or dry
‡
S3 / S3
contact device for remote setback.
‡
S4 / S4
A Connect to THM4000R1000 Wireless Adapter
B for extended wireless range.
C
D
Description