Honeywell TH8320R1003 Vision Pro 8000 Product Data page 22

®
VISIONPRO 8000 WITH REDLINK™
ISU Installer Setup
Number Name
209 Cool Stage 4 None
U1
U2
U3
210 Heat Stage 3 None
U1
U2
U3
211 Fan Control in No Fan
Heat
Equip Controls Fan
Tstat Controls Fan
212 Backup Heat Type
None
Electric
Gas/Oil
213 Backup Heat 0 - 2
Stages
214 Backup Heat Stg 2 None
U1
68-0312—01
Table 2. Installer Setup (ISU) Table. (Continued)
Settings Default
Default varies
based on
previous
selections
Default varies
based on
previous
selections
Equip Controls
Fan
None
1
Default varies
based on
previous
selections
22
Residential,
Commercial Requires
or Both EIM
Commercial Yes Cool Stage 4 is only available if ISU 101 is
Commercial.
Cool Stage 4 must be wired to a universal
terminal (U1, U2 or U3).
U1, U2 and U3 are normally open dry contacts
when configured for a stage of Cool. U1, U2
and U3 require power from a system
transformer or a separate transformer.
U2 and U3 are only available on the
Equipment Interface Module (EIM).
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).
Heat Stage 3 must be wired to a universal
terminal (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 No Fan is only displayed when ISU 201
Heating Equipment is Other.
Both No This ISU is only displayed when ISU 201
Heating Equipment is Radiant Heat or Other.
When ISU 201 Heating Equipment is Radiant
Heat, the thermostat keeps the Radiant Heat
on when it calls for Backup Heat.
When ISU 201 Heating Equipment is Other,
you can select how the backup operates. See
ISU 215.
Both No This ISU is only displayed when a backup heat
source is selected at ISU 212 Backup Heat
Type.
Maximum of 2 Backup Heat stages.
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 3
conventional heat stages. When there are a
total of 3 conventional heat stages, the last
stage of heat 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.
Notes