What are VAV Zone Controllers?
An i-Vu® Open Control System offers 2 VAV Zone Controllers, the VAV Zone Single Duct controller (#OPN-VAVB1)
and the VAV Zone Fan Terminal controller (#OPN-VAVB3), to control zone temperature using single duct or fan
powered terminals in a Variable Air Volume (VAV
®
) application. Although a VAV Zone Controller can be included in
a VVT system, this manual focuses mainly on its usage in VAV applications.
The VAV Zone Controller has a built-in actuator and maintains zone temperature by operating the terminal fan and
regulating the flow of conditioned air into the space. Buildings with diverse loading conditions can be supported by
controlling the local terminal's supplemental heat. The VAV Zone Controller provides dedicated control functions
for single duct, parallel fan box terminals and series fan box terminals with modulating heat, up to 2 stages of
ducted heat, or combination baseboard and ducted heat.
The following illustration shows the VAV Zone Controller in a typical i-Vu Open Control System.
VVT Zone
(OPN-VVTZC)
VVT Zone
(OPN-VVTZC)
VVT Zone
(OPN-VVTZC)
VVT Zone
(OPN-VVTZC)
MANUAL ON
WARMER
Occupied
INFO
COOLER
F
MANUAL ON
WARMER
Occupied
INFO
COOLER
F
MANUAL ON
WARMER
Occupied
INFO
COOLER
F
MANUAL ON
WARMER
Occupied
INFO
COOLER
F
UC Open
Introduction
VAV Zone Controllers
1
