HC

Configuring Unit Ventilator H/C Stages

Use the Unit Ventilator H/C Stages page to set the minimum on/off times, Cycles/ hour, recovery ramps of a Unit Vent application for heating and cooling stages.

Purpose

Define heating and cooling (h/c) stage parameters, including minimum on and off times.

Mode

Off-line or On-line

Procedure

  1. Click the HcStageParameter button on the left pane to open the H/C Stage Parameters Configuration page.
  2. Enter information into available fields.
  3. Click Commit to save the settings or Reset to revert to the last saved settings.
  4. Click Next to display the Zone Operations Configuration page or Back to display the Economizer Configuration page.

Fields

Name Definition
Min On/Off
  • Min_heat_on enables minimum on/off times.
  • Min_heat_off replaces set minimum on/off times with a 30-second default.
  • Min_cool_on enables minimum on/off times.
  • Min_cool_off replaces set minimum on/off times with a 30-second default.
Cycles/Hour Cycles per hour (cph). Enter value from 2 through 12. For example, cph for conventional heating stage one is normally 3 cph. Consult your hardware installation guide for recommended values.
OaTemp LockOut OA temperature lockout. OA temperature values below the cooling lockout setting disables the cooling stages. OA temperature values above the heating lockout setting disable the heating stages.
Ramp Recovery ramp (degrees per hour). Enter value from 2 through 20 for cooling or 3 through 20 for heating
Fan Run-On Time Enter amount of time (from 0 to 120 seconds) the fan will continue to run after the last stage of heating or cooling has switched off.

This value is only applicable during unoccupied times, and during occupied times if the Fan Control field is set to Auto_Fan.

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