Honeywell Home THX9321 Prestige 2.0 Manual page 34

®
THX9321 PRESTIGE 2.0 AND THX9421 PRESTIGE
ISU Installer Setup
Number Name
Comfort
3080, Staging Control -
3090 Backup Heat 2.0° F to 15.5° F from setpoint (in
0.5° F increments)
Differential Stage 2
Off
3110 Backup Heat
(30, 45, 60, 75, 90) minutes
Upstage Timer
(2, 3, 4, 5, 6, 8, 10, 12, 14, 16)
hours
Auto, 15, 30, 45, 60, 75, 90, 105,
3110 Backup Heat Holdoff
120 minutes
Timer
Off
3120 Outdoor
Temperature -15° F to 60° F (in 5° F
increments)
Lockouts:
Compressor Lockout
/ Balance Point
68-0311—08
®
IAQ WITH EIM
Table 4. Installer Setup (ISU) Table. (Continued)
Settings Default
Comfort
Off
Auto
Off
(See Notes)
34
Residential,
Commercial Requires
or Both EIM
Both No ISU 3010 Temperature Control Options must
be set to Advanced to view or adjust Backup
Heat Differential Stage 2.
This ISU is only displayed if there are 2 backup
heat stages.
The indoor temperature must drop to the
selected differential setting before the
thermostat will turn on backup heat stage 2.
For example, if backup heat stage 2 is set to 2°
F (1.0° C), the indoor temperature must be 2° F
(1.0° C) away from the setpoint before backup
heat stage 2 turns on. When set to Comfort, the
thermostat will use backup heat stage 2 as
needed to keep the indoor temperature within
1° F (0.5° C) degree of the setpoint.
Both No The Backup Heat Upstage Timer starts when
the highest stage of the previous heating
equipment type turns on. Backup heat will be
used (if needed) when the timer expires. See
"Backup Heat Upstage Timer" beginning on
page 97.
This ISU is only displayed when Backup Heat
Differential Stage 1 is set to 2 F or higher (ISU
3080, 3090).
Both Yes The Backup Heat Holdoff Timer starts when the
highest stage of the previous heating
equipment type turns on. Backup heat will be
used (if needed) when the timer expires. See
"Backup Heat Holdoff Timer" on page 97.
This ISU is only displayed when upstage timer is
set to 30 minutes or longer."
Both No ISU 3120 Compressor Lockout / Balance Point
requires an outdoor sensor.
Default is 40 F if ISU 2010 Heating Equipment
Type is Air to Air Heat Pump and ISU 2180
Backup Type is gas or oil forced air.
Default is Off if ISU 2010 Heating Equipment
Type is Air to Air Heat Pump and ISU 2180
Backup Type is electric forced air.
Default is Off if ISU 2010 Heating Equipment
Type is Geothermal Heat Pump or Geothermal
Radiant Heat.
Compressor Lockout / Balance Point is
optional for any type of heat pump (Air to Air
Heat Pump, Geothermal Heat Pump or
Geothermal Radiant Heat).
See "Heat Pump with Outdoor Temperature
Lockouts" beginning on page 98.
Notes