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infiNET EX Thermostat (Fan Coil Unit) Crestron CHV-TSTATEX-FCU

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infiNET EX Thermostat (Fan Coil Unit): CHV-TSTATEX-FCU Operations & Installation Guide – DOC. 7206C

Dual Setpoint Auto Mode (“AU” = “d” in Setup Mode)

In dual setpoint Auto mode, separate heat and cool setpoints are used. When the

ambient temperature drops below the heat setpoint, the unit calls for heat to maintain

the heat setpoint. When the ambient temperature rises above the heat setpoint, the

unit does not call for cooling until the temperature exceeds the cool setpoint. When

the ambient temperature drops below the cool setpoint, the unit does not call for

heating until the temperature is below the heat setpoint.

When dual setpoint Auto mode has been enabled, the Auto Dead Band is used to

maintain a minimum separation between the heat and cool setpoints. If this

separation is violated by a setpoint adjustment, the other setpoint is automatically

adjusted.

For example, if the heat setpoint is at 68 degrees, the cool setpoint is at 72 degrees

and the Auto Dead Band is set to 4 degrees, if the cool setpoint is lowered to 71

degrees, the heat setpoint is automatically adjusted to 67 degrees to maintain the 4

degree Auto Dead Band separation.

In dual setpoint Auto mode, the CHV-TSTATEX-FCU display indicates whichever

setpoint is closer to the ambient temperature. Both the heat and cool setpoints can be

viewed simultaneously using a touch screen.

NOTE: When using a Dual setpoint, the CHV-TSTATEX-FCU has a 20 minute

change limiter to prevent system toggling.

Single Setpoint Auto Mode (“AU” = “S” in Setup Mode)

In single setpoint Auto mode, a single setpoint is used for regulation at all times,

regardless of whether the system is heating or cooling. The Auto Dead Band (db)

setup parameter is used to determine when to switch between heating and cooling.

For example, if the setpoint is at 70 degrees and the Auto Dead Band is set to 2

degrees, if the system is cooling, it does not start heating until the ambient

temperature drops below 68 degrees (setpoint – Auto Dead Band). Once the unit has

switched to heating, it does not resume cooling until the ambient temperature rises

above 72 degrees (setpoint + Auto Dead Band).

A larger value for the Auto Dead Band setting results in less cycling between heating

and cooling but can result in large temperature swings during the course of the day.

Smaller values for the Auto Dead Band setting results in tighter temperature

regulation but more frequent cycling between heating and cooling.

NOTE: When using a single setpoint, the CHV-TSTATEX-FCU has a 20 minute

change limiter to prevent system toggling.

Fan

The FAN button toggles the fan setting between fan AUTO, fan high (F3), fan

medium (F2) and fan low (F1). When set to AUTO, a fan call is made whenever the

system makes a cool call or when the system makes a heat call (if the DIP switch is

set to “Enabled”). When set to F3, F2 or F1 the fan always runs.

Setpoints

The setpoint is the user selectable temperature the system maintains.

The

and buttons change the current setpoint by one degree F or C.

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Crestron CHV-TSTATEX-FCU Guía de instalación Pagina 28

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