Installation guide

infiNET EX Thermostat Crestron CHV-TSTATEX
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infiNET EX Thermostat: CHV-TSTATEX Operations & Installation Guide – DOC. 6989C
either the flame or snowflake icon to flash rapidly. This
indicates which setpoint is adjusted by subsequent presses of the
or
buttons. To adjust or view the alternate setpoint, press the MODE
button while the icon is flashing. This causes the alternate icon to flash
and now the
and buttons adjust that setpoint. The flashing icon
times out after 5 seconds of no button activity.
b. In single setpoint Auto mode, use the buttons to adjust the setpoint as
usual.
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 display indicates whichever
setpoint is closer to the ambient temperature. Both the heat and cool setpoints can be
viewed simultaneously using a touch screen.
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 result in tighter temperature
regulation but more frequent cycling between heating and cooling.
NOTE: When using a single setpoint, the CHV-TSTATEX has a 20 minute change
limiter to prevent system toggling. Changing the setpoint resets the 20 minute change
limiter.
Fan
The FAN button toggles the fan setting between fan AUTO and fan ON. When set to
AUTO, a fan call is made whenever the system makes a cool call or when the system