Siemens Powermite 599 Series Owner's manual
Powermite 599 Series
Technical Instructions
Document No. 155-195P25
EA 599-13
January 12, 2018
MZ Series SSB
Electronic Valve Actuator
24 Vac Floating Control
Siemens Industry, Inc.
Description The Powermite 599 MZ Series SSB electronic valve actuator requires a 24 Vac supply
floating control signal to provide floating control. This actuator is designed to work with
Powermite 599 MZ Series zone control valves with a 7/32-inch (5.5 mm) stroke and a
threaded valve bonnet that fits the actuator.
Features •UL listed for plenum installations
•Direct-coupled installation without tools
•Manual override
•Visual position indication
Application For use in heating and cooling HVAC applications with Powermite 599 MZ Series
valves that need 45 lb. (200N) nominal force. They can be used in liquid service
applications.
Product Number SSB81U Actuator prefix code 254
Ordering
Information To order a complete valve plus actuator assembly from the factory, combine the
actuator prefix code with the suffix of the valve product number. See Technical Bulletin
TB 252 (155-307P25) for selection procedures.
To order an actuator only, use the product number.
Warning/Caution Notations
WARNING: Personal injury or loss of life may occur if you do not perform
a procedure as specified.
CAUTION: Equipment damage or loss of data may occur if you do not
follow a procedure as specified.
Technical Instructions Powermite 599 MZ Series SSB Electronic Valve Actuator
Document No. 155-195P25 24 Vac Floating Control
January 12, 2018
Page 2 Siemens Industry, Inc.
Specifications
Power supply Operating voltage 24 Vac ±20%
Frequency 50/60 Hz
Power consumption 0.8 VA
Function Running time
60 Hz 150 seconds
50 Hz 180 seconds
Nominal stroke 7/32-inch (5.5 mm)
Nominal force 45 lbs. (200N)
Agency certification UL listed to UL873
cUL certified to Canadian Standard
C22.2 No. 24-93
Ambient conditions Ambient temperature
Operation 34°F to 122°F (1°C to 50°C)
Transport and storage -13°F to 158°F (-25°C to 70°C)
Miscellaneous Medium temperature 34°F to 230°F (1°C to 110°C)
Dimensions See Figure 8
Weight 9 oz. (0.25 kg)
Accessory
Figure 1. Conduit Connector.
ASY97 Conduit connector
quantity one (1).
Service Kits
Figure 2. Terminal Plug and Block
Cover.
ASY99 Terminal plug and terminal block
cover for SSB81U
quantity one (1).
ASY98 Replacement screw and nut for use on the conduit connector or the terminal
connector, quantity one each.
Powermite 599 MZ Series SSB Electronic Valve Actuator Technical Instructions
24 Vac Floating Control Document No. 155-195P25
January 12, 2018
Siemens Industry, Inc. Page 3
Operation A 24 Vac control signal to the Y1 extends the actuator output shaft.
A 24 Vac control signal to the Y2 retracts the actuator output shaft.
The stroke travel is proportional to the length of time the signal is applied. With no
control voltage or in the event of a power failure, the actuator maintains its last
position.
NOTE: Do not attempt to operate an actuator if it is not attached to a valve. In this
situation, the actuator will only respond to a signal on terminal Y1, and drive
to the full stroke position. It will then hold at the full stroke position.
Only by attaching the actuator to a valve, or by manually depressing the
actuator stem to engage an internal micro-switch, will the actuator respond to
a signal on terminal Y2.
Mounting and
Installation
Figure 3. Mounting Position.
Mount the actuator in one of the allowable positions shown in Figure 3.
When mounting the actuator in a plenum, the proper cable must be attached to meet
local codes.
Allow 8 inches (200 mm) above the actuator and 8 inches (200 mm) behind the cable
for service.
Installation Instructions are included with the actuator.
Wiring Do not use autotransformers. Use earth ground isolating step-down Class 2 power
supplies.
Determine supply transformer rating by summing total VA of all actuators used.
It is recommended that one transformer power no more than 10 actuators.
See Table 1 for terminal connections.
NOTE: Can be wired either neutral or hot switched.
Technical Instructions Powermite 599 MZ Series SSB Electronic Valve Actuator
Document No. 155-195P25 24 Vac Floating Control
January 12, 2018
Page 4 Siemens Industry, Inc.
Wiring, Continued
Y2 Retracts actuator shaft
Y1 Extends actuator shaft
G Neutral
Figure 4. SSB81U Hot Switching
Non-Spring Return
Y2 Retracts actuator shaft
Y1 Extends actuator shaft
G System potential (hot)
Figure 5. SSB81U Neutral Switching
Non-Spring Return.
Manual Override For manual positioning, turn the manual override knob in the center of the position
indicator. See Figure 6. Turn clockwise to move the output shaft outward.
The actuator will maintain its position until power is provided or restored.
Figure 6.
Note:
When knob is turned
counterclockwise (A), the
spindle is retracted.
When knob is turned
clockwise (B), the
spindle is extended
Powermite 599 MZ Series SSB Electronic Valve Actuator Technical Instructions
24 Vac Floating Control Document No. 155-195P25
January 12, 2018
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.
© 2018 Siemens Industry, Inc.
Siemens Industry, Inc.
Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089
USA
+ 1 847-215-1000
Your feedback is important to us. If you have comments
about this document, please send them to
sbt_technical.editor.us.sbt@siemens.com
Document No. 155-195P25
Printed in the USA
Page 5
Start-Up Check the wiring and the position indication.
Position indicator at 0
(Output shaft is retracted) Position indicator at 1
(Output shaft is extended)
Figure 7. Position Indicator.
Troubleshooting Check Wiring for proper connections.
Service Kits See Accessory and Service Kits for available accessory and service parts.
If the actuator is inoperative, replace the unit.
Disposal The device is considered electrical and electronic equipment for disposal in
terms of the applicable European Directive and may not be disposed of as
domestic garbage.
•Dispose of the device through channels provided for this purpose.
•Comply with all local and currently applicable laws and regulations.
Dimensions
Figure 8. Dimensions of the SSB Actuator. Dimensions Shown in Inches (Millimeters).
Service envelope Minimum access space recommended:
8 inches (200 mm) above the actuator and beside the terminal plug.
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