VISIONPRO® 8000 SMART THERMOSTAT
13
33-00096—04
215
Run Backup Heat
with Primary
No
Yes
No
Both
This ISU is only displayed when ISU 200 Heating
Equipment is Other.
When ISU 200 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 200 Heating Equipment is Radiant Heat,
the thermostat keeps the Radiant Heat on when it
calls for Backup Heat.
216
Backup Heat Fan
Equip Controls Fan
Tstat Controls Fan
Tstat Controls Fan
Both
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.
217
Backup Heat Stage
2
None
U1
Default varies based
on previous selections
Both
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.
218
Backup Heat Type
Electric
Gas/Oil
Electric
Both
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 55.
219
External Fossil Fuel
Kit
No
Yes
No
Both
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.
222
Economizer fault
“FDD”
No
Yes
No
Commercial
If your code requires that the thermostat display an
alert when the economizer is sending a fault code,
select “Yes”. When this is done, the economizer will
need to be wired as shown in Fig. 229 on page 87.
222
Economizer Wiring
T-stat terminal U1
T-stat terminal U1
Commercial
Only shown if “economizer fault FDD” is set to yes.
This setting is to inform installer only. It is not
adjustable. See economizer with fault wiring, Fig.
229 on page 87.
Table 2. Installer Setup (ISU) Table. (Continued)
ISU
Number
Installer Setup
Name
Settings
Default
Residential,
Commercial
or Both
Notes
