| Вид документа | Прикладна нотатка |
|---|---|
| Виробник | JCI |
| Код документа | va-7150-incremental-reheat-control-application-note |
| Група обладнання | VA-7150 Incremental Reheat Control |
| Сторінок | 2 |
| Мова документа | англійська |
| Розмір файлу | 0.1 МБ |
Текст документа
FANs 977, 125, 1628.3
Application Note 7150
Issue Date 0395
APPLICATION NOTE
VA-7150 Incremental Reheat Control
This application for the VA-7150 Series Electric Valve VA-7150 VA-7150
Actuator provides control for reheat operations. This 1 2 3 1 2 3
may also include baseboard heat. It is for use with
on-off/floating controllers. Obtain the system diagrams
for controller installation to verify proper terminals for Com B0 B0 24 VAC B0 B0
each actuator. UNT, VAV,
DX-9100
or AHU
Terminal Function
1 Common Figure 2: Incremental Wiring
2 Down
3 Up
Reheat
Coil
Energizing Terminals Actuator Coupler
1-2 Extends VA-7150
Room Sensing
1-3 Retracts
UNT, VAV,
Providing 24 VAC to terminals 1 and 2 will cause the AHU, or DX-9100
actuator drive screw to extend, pushing the valve stem
down. Providing 24 VAC to terminals 1 and 3 will VA-7150
cause the actuator drive screw to retract, pulling the
valve stem up.
Reheat Baseboard Heat
Coil
Figure 3: Parallel Operation,
Sensor One Controller and Two Actuators
VA-7150
UNT, VAV,
AHU, or
DX-9100
Com B0 B0
Figure 1: Typical Incremental Control Reheat
Configuration
© 1995 Johnson Controls, Inc. 1
Part No. 34-636-518
Code No. LIT-977316
VA-7150 VA-7150
IMPORTANT: ● Do not mix VA-8020 or VA-8050
actuators with VA-7150 actuators
1 2 3 1 2 3 in this application.
Com ● Two position operation is not
UNT, VAV, recommended unless a means is
AHU, or B0
provided to disconnect power to
DX-9100
B0 the actuator at the ends of
stroke. End stop limiting results
Figure 4: One Controller, Two Actuator Wiring in maximum life of the actuator.
● It is not recommended to mix
valves with different stroke
lengths because of variations in
time to stroke.
For application at conditions beyond these specifications, consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for
damages resulting from misapplication or misuse of its products.
Controls Group
507 E. Michigan Street
P.O. Box 423
Milwaukee, WI 53201 Printed in U.S.A.
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