VISIONPRO
®
8000 WITH WI-FI
®
33-00096—01 18
308,
309
Backup Heat
Droop Stage 2
Comfort
2.0° F to 15.5° F from setpoint
(in 0.5° F increments)
Comfort Both ISU 301 Control Options must be set to
Advanced to view or adjust Backup Heat Droop
Stage 2.
This ISU is only displayed if there are 2 backup
heat stages.
The indoor temperature must drop to the
selected droop 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.
311 Upstage Timer for
Backup Heat
Off
(30, 45, 60, 75, 90) minutes
(2, 3, 4, 5, 6, 8, 10, 12, 14, 16)
hours
Off Both 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 55.
This ISU is only displayed when Backup Heat
Droop Stage 1 is set to 2 F or higher (ISU 308,
309).
312 Outdoor Lockout
Heat Pump
(Balance Point)
Off
5° F to 60° F (in 5° F increments)
Off
(See Notes)
Both ISU 312 Heat Pump Outdoor Lockout requires
an outdoor sensor.
Default is 40 F if ISU 201 Heating Equipment is
Air to Air Heat Pump and ISU 218 Backup Heat
Type is Gas/Oil.
Default is Off if ISU 201 Heating Equipment is
Air to Air Heat Pump and ISU 218 Backup Heat
Type is Electric.
Default is Off if ISU 201 Heating Equipment is
Geothermal or Geothermal Radiant.
Heat Pump Outdoor Lockout 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 56.
312 Outdoor Lockout
Backup Heat
Off
5° F to 65° F (in 5° F increments)
Off Both ISU 312 Backup Heat Outdoor Temperature
Lockout requires an outdoor sensor.
This ISU is only displayed if ISU 201 Heating
Equipment is Air to Air Heat Pump, Geothermal
or Geothermal Radiant and ISU 219 External
fossil fuel kit is set to No.
See “Heat pump with outdoor temperature
lockouts” beginning on page 56.
Table 2. Installer Setup (ISU) Table. (Continued)
ISU
Number
Installer Setup
Name Settings Default
Residential,
Commercial
or Both Notes
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