Min/max control by the VAV Compact Controller - Basic Documentation - GDB181.1E/BA - GDB181.1EMBA - GLB181.1E/BA

VAV Compact Controller BACnet MS/TP G..B181.1E/BA

Product Family
OpenAir
Product Group
Damper actuators
Content Language
English
Content Type
Technical Documentation > Basic Documentation
Product Version
Status
Valid
Date
2021-10-26
Document No
A6V10631864_en--_g
Download ID
A6V10695831
Stock No.
S55499-D168
S55499-D169
S55499-D506
Product No.
GDB181.1E/BA
GDB181.1EMBA
GLB181.1E/BA

When setting the minimum / maximum air volume flow in the VAV Compact Controller, the supervisory controller must be set to Vmin= 0% und Vmax = 100 %. With this setting, the supervisory controller reference signal for both the supply air and extract air controller is the same. Thus, supply air / extract air control with a single reference signal is possible.

Setting example B1

VAV ratio control 1 : 1

Supply air Extract air
Vmin Vmax Vmin Vmax
Supervisory controller 0 % 100 % 0 % 100 %
VAV compact controller 20 % 80 % 20 % 80 %

Reference signal: Ysupply_air = Yextract_air = 25 %

Result: Vsupply_air = Vextract_air = 35 %

Setting example B2

VAV ratio control, 20 % constant excess supply air volume flow (positive pressure in the room)

Supply air Extract air
Vmin Vmax Vmin Vmax
Supervisory controller 0 % 100 % 0 % 100 %
VAV Compact Controller 20 % 80 % 0 % 60 %

Reference signal: Ysupply_air = Yextract_air = 25 %

Result: Vsupply_air = 35 %, Vextract_air = 15 %

Setting example B3

VAV ratio control, 20 % constant excess extract air volume flow (negative pressure in the room)

Supply air Extract air
Vmin Vmax Vmin Vmax
Supervisory controller 0 % 100 % 0 % 100 %
VAV Compact Controller 20 % 80 % 40 % 60 %

Reference signal: Ysupply_air = Yextract_air = 25 %

Result: Vsupply_air = 35 %, Vsupply_air = 55 %