CVAHU Inputs

Description

To select the wall module type, voltage and resistive inputs for a CVAHU application.

Purpose

Enter all inputs to be wired to the CVAHU.

Mode

Off-line or On-line

Procedure

  1. Click the Inputs button on the left pane to open the Input Configuration page.
  2. Enter information into available fields.
  3. Select Space Temp sensor type.
  4. Select the optional Digital and Analog Inputs.
  5. Click Commit to save the settings or Reset to revert to the last saved settings.
  6. Click Next to display the Equipment Control Configuration page or Back to display the Ouput Configuration page.

Fields           

Name Definition
Space Temp Space Temp sensor type. Select one of the following options:
  • Wall Module
  • LCD WallModule (physical sensor)
  • NetworkOnly (network sensor signal)

Note

The LCD wall module is supported by the following versions of CVAHU:

  • CVAHU Model A- v1.02.14
  • CVAHU Model C – v2.01.103
  • CVAHU Model B Enhanced – v2.01.103
Wall Module You cannot modify this option as it is read-only. Supports the following types:
  • Sensor Only
  • Sensor Setpoint
  • Sensor Bypass
  • Sensor Setpoint Bypass

See the table below for further details.
Optional Digital Inputs You can configure digital inputs. The W7750A can be configured with a maximum of two digital inputs. The W7750B, W7750B Enhanced, and the W7750C, can be configured with all four digital inputs. CoilfreezeStat is available on W7750B Enhanced and W7750C only.

Configure one of the following as an optional digital point:

  • OccSensor
  • OccTimeclock
  • ProofAirFlow
  • EconEnable
  • IaqOverride
  • SmokeMonitor
  • DirtyFilter
  • Shutdown
  • WindowOpen
  • MonitorSw
  • ScheduleMaster
  • Dehumidify
  • Unused DI
Optional Analog Inputs You can configure both resistive and voltage type analog inputs. The W7750A, has one resistive analog input that can be configured. The W7750B, W7750B Enhanced, and W7750C have two resistive and two voltage inputs that can be configured. The W7750B Enhanced and W7750C supports the OutdoorTemp20KNTC sensor type.

Configure one of the following as a Resistive optional analog point:

  • DschgTempPT3000
  • OutdoorTempPT3000
  • RtnTempPT3000
  • DschgTemp20KNTC
  • OutdoorTemp20KNTC
  • RtnTemp20KNTC
  • Unused RAI

Configure one of the following as a Voltage/current optional analog point:

  • Rtn HumidityC7600C
  • RtnEnthalpy
  • OdHumidityC7600C
  • OdEnthalpy
  • FilterPress
  • SpaceCO2
  • MonitorSensor
  • Rtn HumidityH7621
  • Rtn HumidityC7600B
  • OdHumidityH7621
  • OdHumidityC7600B
  • Unused VAI

Note

  1. The RtnHumidityH7621/31 and OdHumidityH7621/31 humidity sensors for voltage inputs are supported by CVAHUs of model type CVAHU B Enhanced and CVAHU C whose versions are 2.01.103 and above.
  2. The other humidity sensor models H7620 and H7630 work fine when CVAHU is configured to use the existing C7600C humidity sensors.
  3. The DischTemp20KNTC sensor can be used to report valid temepratures upto 180 deg F. This is applicable for CVAHU B Enhanced and CVAHU C models whose versions are 2.01.103 and above. This is applicable to CVAHU Model A also whose version is 2.01.13 and above.

The wall module configuration affects the Use Wall Module (under Zone Option page) and Over Ride Priority (under Miscellaneous Parameters page). The possible values of Use Wall Module and Over Ride Priority is given in the following table:

  Use Wall Module as
Setpoint in Zone Option page		 Use Override Priority
in Miscellaneous Parameter page
 Meaning
Sensor Only


No None Use Wall module as Sensor only
Sensor Setpoint Yes None Use Wall module as Sensor as well as get set point.
Sensor Bypass No Normal

Bypass

 Use Wall module as Sensor as well as for bypass.
Sensor Setpoint Bypass Yes Normal

Bypass

 Use Wall module as Sensor and get the set point as well as for bypass

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