Honeywell THX9321 Prestige 2.0 Product Data page 57

ISU Installer Setup
Number Name
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.
9050 A/C with Low
Speed Fan Setup
Hot Gas Bypass
Setup
Note: Installer
Setup Name varies
depending on the
dehumidification
equipment
installed.
9070 Dehumidification -
Overcooling Limit
Table 4. Installer Setup (ISU) Table. (Continued)
Settings
None
U1
U2
U3
Normally Closed
Normally Open
0°, 1°, 2°, 3° F
®
THX9321 PRESTIGE 2.0 AND THX9421 PRESTIGE
Residential,
Commercial
Default or Both
Thermostat Both
defaults to the
next unused
universal
terminal (U1,
U2, U3).
Defaults to Both
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
3° F Residential
57
Requires
EIM Notes
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.
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
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.
®
IAQ WITH EIM
68-0311—02