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Setup and Configuration
19
ViewStat Color Communicating Thermostat User Guide
Thermostat Setup Screen
The Thermostat Setup screens (FIG. 16) enable you to set temperature differentials between the heating
and cooling setpoints. On this screen, you can also set the balance point if you have a single or dual stage
heat pump system. You can use the navigation buttons to move through the highlighted options. The
Mode/Select button selects the highlighted item. You can then use the navigation buttons to change the
setting of the highlighted option.
Pressing Mode/Select again highlights the next available option. The following table lists the options on
the Thermostat Setup screen:
FIG. 16 Thermostat Setup screens
Thermostat Setup Screen Options
First Stage Diff Enables you to set the 1st stage temperature differential. Differentials set the
tightness of the temperature control to eliminate large temperature swings and
prevent the HVAC system from operating too often. Normally the second stage
of heat is for auxiliary or emergency heat. Energy Star recommends that a
programmable thermostat be capable of maintaining room temperature swings
within ± 2°F of the set point temperature. You can choose from 0.5°F, 1.0°F,
and 2.0°F (or 0.25°C, 0.5°C, 1.0°C). The default value is 0.5°F (0.25°C).
Second Stage Diff Enables you to set the 2nd stage temperature differential. You can choose from
1.0°F, 2.0°F, 3.0°F, 4.0°F, 5.0°F, and 6.0°F (or 0.5°C, 1.0°C, 1.5°C, 2.0°C,
2.5°C, 3.0°C). The default value is 2.0°F (1.0°C).
Deadband The Deadband is the temperature difference between the heating and cooling
setpoints. The Deadband configuration enforces a minimum separation
between the two setpoints which determine when auto changeover between
HVAC heating and cooling mode will occur. You can choose from 2.0°F, 3.0°F,
4.0°F, and 5.0°F. The default Deadband is 4.0°F.
Temperature Offset The temperature offset enables you to customize the temperature shown on
the display. You can set the temperature offset in 1° increments. The default
temperature offset is 0.
Balance Point Balance Point configuration enables you to adjust a low or high balance point
to limit auxiliary heat pump operation according to the current outdoor
temperature. The compressor terminals will not be energized when the outdoor
temperature is below the balance point. This does not affect Emergency Heat
operation. This option is only valid if the thermostat has been configured to
operate as a heat pump. The default Balance Point is 30°F. This option is only
available if your thermostat is configured to operate as a heat pump.
Exit Returns you to the Advanced Setup screen.