Honeywell PRESTIGE THX9321 - Manual (Page 57)

THX9321 PRESTIGE ® 2.0 AND THX9421 PRESTIGE ® IAQ WITH EIM
57 68-0311—02
9040 What Terminals are
Wired to A/C with
Low Speed Fan?
What Terminals are
Wired to Hot Gas
Bypass?
What Terminals are
Wired to the
Dehumidifier?
What Terminals are
Wired to the Whole
House
Dehumidifier?
Note: Installer
Setup Name varies
depending on the
dehumidification
equipment
installed.
None
U1
U2
U3 Thermostat
defaults to the
next unused
universal
terminal (U1,
U2, U3).
Both No Number of Universal Outputs:
THX9321 Thermostat: U1 and U2 terminals
Equipment Interface Module (EIM): U1, U2
and U3 terminals
U1, U2, U3 are dry contacts that require
power. See “Wiring IAQ Equipment or a
Heat/Cool Stage to the Universal
Terminals” beginning on page 149.
9050 A/C with Low
Speed Fan Setup
Hot Gas Bypass
Setup
Note: Installer
Setup Name varies
depending on the
dehumidification
equipment
installed.
Normally Closed
Normally Open Defaults to
Normally
Closed when
ISU 9000
Dehumidificati
on Equipment
is A/C with Low
Speed Fan
Defaults to
Normally Open
when ISU 9000
Dehumidificati
on Equipment
is Hot Gas
Bypass
Both No Choose an option appropriate for the type
of equipment installed.
Normally Open: U1, U2 or U3 will normally
be open and will close when the thermostat
calls for dehumidification.
Normally Closed: U1, U2 or U3 will
normally be closed and will open when the
thermostat calls for dehumidification.
Number of Universal Outputs:
THX9321 Thermostat: U1 and U2 terminals
Equipment Interface Module (EIM): U1, U2
and U3 terminals
9070 Dehumidification -
Overcooling Limit
0°, 1°, 2°, 3° F 3° F Residential No This ISU is only displayed when ISU 9000
Dehumidification Equipment is set to A/C
with Low Speed Fan or A/C with High
Speed Fan.
The thermostat uses the cooling system to
reduce humidity by lowering the
temperature up to 3° F below the current
cool setpoint until the desired humidity
level is reached.
The thermostat keeps the temperature
below the cooling setpoint until the desired
humidity level is reached.
0° F is only an option when ISU 9000
Dehumidification Equipment is set to A/C
with Low Speed Fan.
Table 4. Installer Setup (ISU) Table. (Continued)
ISU
Number
Installer Setup
Name Settings Default
Residential,
Commercial
or Both
Requires
EIM Notes