Crestron CHV-RTS User Manual download pdf (Page 27)

Crestron CHV-TSTATEX infiNET EX™ Thermostat

Operation

System Mode

The MODE button on the CHV-TSTATEX will cycle the unit through all available

system modes in the following order: Off, Heat, Emergency Heat (for heat pump and

dual-fuel systems), Cool and Auto (if enabled in Setup).

The system mode will change upon release of the MODE button and the selected

mode will become operational five seconds after the mode has been entered.

Off Mode

In Off mode, all HVAC systems are disabled.

Heat Mode

In Heat mode, the thermostat uses the heating system to maintain the setpoint

temperature.

AUX Heat Mode

In Aux Heat mode, the thermostat uses only the auxiliary heat output on heat pump

or dual-fuel systems to maintain the setpoint temperature.

NOTE: Aux Heat mode can only be accessed when heat/cool type has been set to

“Heat pump” or “Dual-Fuel Heat pump”. This setting can be useful when the heat

pump is being serviced or when there is an unexpected problem with it. The display

will flash the “flame” icon when the system is in Aux Heat mode.

Cool Mode

In Cool mode, the thermostat uses the cooling system to maintain the setpoint

temperature.

Auto Mode

In Auto mode, the thermostat allows the system to switch between Heat and Cool

automatically as needed to maintain the setpoint temperature. By default, the

CHV-TSTATEX has been configured with Auto mode disabled, meaning it is not

available from the thermostat itself or via another interface such as a touch screen.

In order to enable Auto mode, you must enter Setup mode and change the “AU”

setting from “--” to either “d” (dual setpoint) or “S” (single setpoint). Refer to “Setup

Mode” which starts on page 19 for details.

Once Auto mode has been enabled, you can access it from the CHV-TSTATEX

controls as follows:

1. Press the MODE button until both the flame

and snowflake icons

appear in the display. This indicates Auto mode is now active.

2. Use the

and buttons to adjust the setpoint. Actual operation will

depend on whether you are using single or dual setpoints.

a. In dual setpoint Auto mode, the first press of the

or buttons (or

second press if the first press simply turned on the backlight) will cause

either the flame

or snowflake icon to flash rapidly. This

Operations & Installation Guide – DOC. 6989A infiNET EX™ Thermostat: CHV-TSTATEX • 23

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Crestron CHV-RTS User Manual Page 27

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