Supply Air Temperature reset in CCP Delivered VAV

Issue:

Supply Air Temperature reset in CCP Delivered VAV

Resolution:

From VAV-SVU01A-EN

Supply Air Setpoint Reset

 

The supply air temperature setpoint can be reset based on zone temperature, return air temperature, or outdoor air temperature. The reset type can be  selected and enabled, and the operating parameters can be set through the  operator display or PC software. During setup a reset setpoint and reset amount  are provided by the operator.  Reset from zone air. If the zone air temperature falls below the reset setpoint,  supply air setpoint reset begins. As the zone air temperature falls below the reset  setpoint by 3F (fixed), the supply air temperature increases by the reset amount  entered by the operator (5F default).  Reset from return air. If the return air temperature falls below the reset setpoint,  supply air setpoint reset begins. As the return air temperature falls below the reset setpoint by 3F (fixed), the supply air temperature increases by the reset amount entered by the operator (5F default).

Reset from outdoor air. If the outdoor air temperature falls below the reset setpoint, supply air setpoint reset begins. As the outdoor air temperature falls below the reset setpoint by 20F (fixed), the supply air temperature increases by the reset amount entered by the operator (5F default).

Reset from return air. If the return air temperature falls below the reset setpoint, supply air setpoint reset begins. As the return air temperature falls below the reset setpoint by 3F (fixed), the supply air temperature increases by the reset amount entered by the operator (5F default).

Reset from outdoor air. If the outdoor air temperature falls below the reset setpoint, supply air setpoint reset begins. As the outdoor air temperature falls below the reset setpoint by 20F (fixed), the supply air temperature increases by the reset amount entered by the operator (5F default).

If Zone is selected, the Supply Air Reset Setpoint is the temperature which the zone must go below for the reset to begin. We think the zone it uses is the same as the morning/daytime warmup zone. Zone 1 or the zone set up in the PC software.

 

Other Question/Problem/Cause Statements:

• Supply air reset in CCP Delivered VAV
• He has questions on Supply Air Reset setup for Delivered VAV in the new CCP III (Varitrac III).

Facts:

• VARITRAC III CENTRAL CONTROL PANEL (CCP)
• VariTrac III Central Control Panel (CCP)

Original wave: wave35666