Honeywell TH8320R1003 Installation Manual page 24

®
VISIONPRO 8000 WITH REDLINK™
ISU Installer Setup
Number Name
215 Run Backup Heat No
with Primary
Yes
216 Backup Heat Fan Equip Controls Fan
Tstat Controls Fan
217 Backup Heat None
Stage 2
U1
218 Backup Heat Type
Electric
Gas/Oil
219 External Fossil
No
Fuel Kit
Yes
68-0312—03
Table 2. Installer Setup (ISU) Table. (Continued)
Settings Default
No
Tstat Controls
Fan
Default varies
based on
previous
selections
Electric
No
24
Residential,
Commercial Requires
or Both EIM
Both No This ISU is only displayed when ISU 201
Heating Equipment is Other.
When ISU 201 Heating Equipment is Other,
you can select how the Backup Heat operates.
The thermostat can be setup to keep the
primary heat source on when it calls for
Backup Heat or the thermostat can be setup to
turn off the primary heat source when it calls
for Backup Heat.
When ISU 201 Heating Equipment is Radiant
Heat, the thermostat keeps the Radiant Heat
on when it calls for Backup Heat.
Both No This ISU is only displayed for conventional
systems when ISU 212 Backup Heat Type is
Electric.
Backup Heat Fan Operation automatically
defaults to Equip Controls Fan when ISU 212
Backup Heat Type is Gas/Oil.
Both No TH8321 Thermostat Only:
This ISU is only displayed on the TH8321
thermostat when it is wired directly to the
equipment (Equipment Interface Module is
NOT used).
The thermostat can support up to 2 backup
heat stages for heat pump applications. When
there are 2 backup heat stages, backup heat
stage 2 must be wired to U1.
U1 is a normally open dry contact when
configured for a stage of Heat. U1 requires
power from a system transformer or a
separate transformer.
Both No This ISU is only displayed when ISU 201
Heating Equipment is Air to Air Heat Pump,
Geothermal or Geothermal Radiant and there
is at least one stage of backup heat.
See "Heat Pump and Backup Heat Operation"
beginning on page 78.
Both No This ISU is only displayed when ISU 201
Heating Equipment is Air to Air Heat Pump,
Geothermal or Geothermal Radiant and ISU
218 Backup Heat Type is Gas/Oil.
Notes