Honeywell PRESTIGE THX9321 - Manual (Page 34)

THX9321 PRESTIGE ® 2.0 AND THX9421 PRESTIGE ® IAQ WITH EIM
68-0311—02 34
3080,
3090
Staging Control -
Backup Heat
Differential Stage 1
Note: “Stage 1" is
not displayed if
there is only 1
stage of Backup
Heat.
Comfort
2.0° F to 15.0° F from setpoint (in
0.5° F increments)
Comfort Both No A backup heat differential can be set on any
system that has more than one heating
equipment type.
See “Backup Heat Differential (Droop)”
beginning on page 98.
The Comfort setting is only available on
systems when the Backup Heat Type is
Allowed to Run with the Primary Heat (Heat
Pump). For example, Heat Pumps with
Electric Forced Air Backup Heat.
The Comfort setting is NOT available for
Dual Fuel systems. For example, Heat
Pumps with Gas Forced Air.
3080,
3090
Staging Control -
Backup Heat
Differential Stage 2
Comfort
2.0° F to 15.5° F from setpoint (in
0.5° F increments)
Comfort 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.
3110 Backup Heat
Upstage Timer
Off
(30, 45, 60, 75, 90) minutes
(2, 3, 4, 5, 6, 8, 10, 12, 14, 16)
hours
Off 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 99.
This ISU is only displayed when Backup
Heat Differential Stage 1 is set to 2 F or
higher (ISU 3080, 3090).
Table 4. Installer Setup (ISU) Table. (Continued)
ISU
Number
Installer Setup
Name Settings Default
Residential,
Commercial
or Both
Requires
EIM Notes