Siemens Powermite 599 Series Manuale del proprietario

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.

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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