The VAV application configures a minimum supply air flow in the temperature control dead zone. The function can be configured individually for all room operating mode.

Description

Name

Default value

Minimum supply air for comfort

1: Off
2:Minimum ventilation
3:Demand-controlled ventilation
4:Minimum ventilation & demand-controlled ventilation

CmfCnf

4:Minimum ventilation & demand-controlled ventilation

Minimum supply air for pre-comfort

PcfCnf

3:Demand-controlled ventilation

Minimum supply air for economy

EcoCnf

1: Off

Minimum supply air for protection

PrtCnf

1: Off

Minimum air volume flow for all room operating modes is also configured.

Description

Name

Default value

Supply air VAV minimum air volume flow for ventilation

VavSuAflMinVnt

0 [m3/h]
0.00 [l/s]

Sequence with
modulating heating valve

Y

Output signal

 

TR

Room temperature

SpH

Effective heating setpoint

 

SpC

Effective cooling setpoint

YH

Heating valve

 

YC

Cooling valve

VavSuAirFlMaxH

Maximum air volume flow for heating

 

VavSuAirFlMaxC

Supply air VAV maximum air volume flow for heating

VavSuAirFlMinH

Supply air VAV minimum air volume flow for heating

 

VavSuAirFlMinC

Minimum air volume flow for cooling

VAV volume flow

 

 

 

Figure: Serial control sequence for a VAV application with modulating heating valve

Sequence with
2-stage heating valve

 

Y

Output signal

 

TR

Room temperature

VAV volume flow

 

SpH

Effective heating setpoint

YH1

First stage electric heating coil

 

YH2

Second stage electric heating coil

VavSuAirFlMaxH

Maximum air volume flow for heating

 

VavSuAirFlMinH

Supply air VAV minimum air volume flow for heating

Figure: Serial control sequence for a VAV application with 2-stage heating valve