Siemens Flowrite 599 Series User manual

Installation Instructions
Document No. 129-701
May 22, 2017
599 Series Zone Valves
STA/STP Thermic Actuators
2-Position or PWM Control
Item Number 129-701, Rev. BA Page 1 of 2
Product Description
24 Vac/Vdc Zone Valve Thermic Actuator with a
maximum stroke of 0.18-inch (4.5 mm).
Contents
•One actuator with cable
•One bayonet nut
Product Numbers
STA73U Normally Closed
STP73U Normally Open
Warning/Caution Notations
WARNING:
Personal injury or loss of life
may occur if you do not follow
the procedures as specified.
CAUTION:
Equipment damage, or loss of
data may occur if you do not
follow the procedures as
specified.
Required Tools
No tools are required to mount the actuator to the
valve. Best results are achieved by hand tightening.
Expected Installation Time
15 minutes
CAUTION:
When selecting a heating or cooling on/off
zone valve that must be closed for long
periods of time or an entire season, use a
Normally Closed actuator (such as the
STA73U Actuator) for new or replacement
applications.
If the valve needs to be open for extended
periods of time or an entire season, use a
Normally Open actuator (such as the
STP73U Actuator) for new or replacement
applications.
STP Actuators should not be used on hot
water systems that remain operational all
year long or where actuators are continually
commanded closed during the summer.
Installation
Installing the Actuator
WARNING:
Do not connect power until after the actuator
is mounted to the valve.
Figure 1. Acceptable Mounting Positions.
NOTE: Actuators may be installed in any position
(360°).
1. Remove the black actuator support ring (AL50)
from the top of the valve. Discard the ring; it is
no longer needed.
2. Screw the bayonet nut (included with actuator)
onto valve bonnet as tightly as possible, by
hand. See Figure 2
CAUTION:
Do not use any tools such as pliers, pipe
wrenches, or vice grips to tighten the nut.
Doing so will damage the bayonet nut, and
the actuator will not be able to properly
mount to the valve.
Figure 2.

Document No. 129-701
Installation Instructions
May 22, 2017
Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and
models as design improvements are introduced. Product or company names mentioned herein may be the trademarks of their respective
owners. © 2017 Siemens Industry, Inc.
Siemens Industry, Inc.
Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089
USA
+ 1 847-215-1000
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Document No. 129-701
Printed in the USA
Page 2 of 2
3. Place the actuator on the bayonet nut connected
to the valve and twist the gray actuator bayonet
ring (at the bottom of the actuator) clockwise
until it clicks twice on the bayonet nut. See
Figure 3.
Figure 3.
The actuator is now properly attached to the valve.
Removing the Actuator
WARNING:
Disconnect the actuator from the power
supply before beginning.
1. Wait at least six minutes until the actuator has
cooled down.
2. Twist the gray actuator bayonet ring counter-
clockwise to the end position. It will click twice
before it gets to the end position.
3. Lift the actuator off the valve body and bayonet
nut.
Dismounting the actuator according to these
instructions will automatically set the actuator back
to the original factory setting.
NOTE: Occasionally, the bayonet nut will come off
the valve with the actuator when removing
the actuator. If the bayonet nut starts to
unscrew from the valve bonnet, twist the
actuator bayonet ring clockwise as tightly
as possible by hand to secure the bayonet
nut to the valve. Then, repeat steps 1
through 3 in Removing the Actuator.
If the bayonet nut continues to unscrew
from the valve body, completely unscrew
the connected actuator and bayonet nut
from the valve. To reuse the actuator, the
actuator stem must be reset to the original
factory setting position. To reset the stem,
turn the actuator upside down, press down
the actuator stem, and simultaneously
twist the gray bayonet ring counter-
clockwise until it latches into place,
resetting the actuator to the original
factory-setting position. The bayonet nut
can now be removed from the actuator.
Wiring
NOTE: G: positive
G0: neutral
Figure 4. Wiring Diagram.
Dimensions
Figure 5. Dimensions in Inches (mm).