Siemens Powermite 599 Series Owner's manual

Powermite 599 Series

Technical Instructions

Document No. 155-195P25

EA 599-13

December 18, 2003

MZ Series SSB Electronic Valve

Actuator

24 Vac 3-position (Floating) Control

EA0579R2

Description

The Powermite 599 MZ Series SSB electronic valve actuator requires a 24 Vac supply

floating control signal to provide three-position 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 and steam

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 may occur if you do not follow procedure

as specified.

Siemens Building Technologies, Inc.

Technical Instructions Powermite 599 MZ Series SSB Electronic Valve Actuator

Document No. 155-195P25 24 Vac 3-position Control

December 18, 2003

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

EA0643R1

Figure 1. Conduit Connector.

ASY97 Conduit connector

quantity one (1).

Service Kits

GY1 Y2

EA0581R1

EA0859R1

Figure 2. Terminal Plug and block cover.

ASY99 Terminal plug and terminal block

cover for SSB81U

quantity one (1).

3mm

EAO808R1

Figure 3. Visual Position Kit.

4 224 5611 8 Visual Position Kit to

replace one indicator and two gears.

(Previous version)

ASY98 Replacement screw and nut for use on the conduit connector or the terminal

connector, quantity one each.

Page 2 Siemens Building Technologies, Inc.

Powermite 599 MZ Series SSB Electronic Valve Actuator Technical Instructions

24 Vac 3-position Control Document No. 155-195P25

December 18, 2003

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

EA0849R2

Figure 4. Mounting Position.

Mount the actuator in one of the allowable positions shown in Figure 4.

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.

NEUT

EARTH GROUND

ISOLATING CLASS 2

TRANSFORMER FOR

24Vac POWER

120Vac

Vac

EA0585R1

Figure 5. Terminal Connections of the SSB81U.

Siemens Building Technologies, Inc. Page 3

Technical Instructions Powermite 599 MZ Series SSB Electronic Valve Actuator

Document No. 155-195P25 24 Vac 3-position Control

December 18, 2003

Wiring, Continued

Table 1. Terminal Connections.

Standard

Symbol

Function Terminal

Connection

1 Supply (SP) G

6 Control signal: Outward

movement of the actuator

output shaft

7 Control signal: Inward

movement of the actuator

output shaft

WARNING:

Terminal connection "G" is Common, not ground.

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.

EA0587R3

Figure 6.

Note:

When knob is turned

counterclockwise (A), the

spindle is retracted.

When knob is turned

clockwise (B), the spindle

is extended

Page 4 Siemens Building Technologies, Inc.

Powermite 599 MZ Series SSB Electronic Valve Actuator Technical Instructions

24 Vac 3-position Control Document No. 155-195P25

December 18, 2003

Start-Up Check the wiring and the position indication.

EA0588R3

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.

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.

EA0589R2

1-7/8

(48)

3-1/4

(83)

3-7/8

(98)

3-1/8

(79)

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. Other product or company names mentioned herein may be the trademarks of their respective owners. ©

2003 Siemens Building Technologies, Inc.

Siemens Building Technologies, Inc.

1000 Deerfield Parkway

Buffalo Grove, IL 60089-4513

Your feedback is important to us. If you have comments

about this document, please send them to

[email protected]

U.S.A.

Document No. 155-195P25

Printed in the U.S.A.

Page 5

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