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ManualsBrandsSiemens ManualsShort Stroke (BC3)Pressure Independent Control SSD Series Electronic Valve Actuators

Pressure Independent

Control Series

Technical Instructions

Document No. 155-773

May 8, 2019

SSD Electronic Valve Actuators

Floating or 0 to 10 Vdc Control

Spring Return

Non-Spring Return

Siemens Industry, Inc.

Description

Pressure Independent Control Series SSD Electronic Valve Actuators require a 24 Vac

power supply and receive a floating control signal (SSD81…) or a proportional 0 to

10 Vdc signal (SSD61…) to control a valve. The 0 to 10V SSD61U actuator also

accepts a 24 Vdc power supply.

These actuators are designed to work with 1/2- to 1-1/4-inch Pressure Independent

Control Series Valves with a 1/10-inch (2.5 mm), 1/5-inch (5 mm), or 7/32-inch (5.5 mm)

stroke and a threaded valve bonnet that fits the actuator.

Features

• Nominal force >56 lbs (250 N)

• Automatic stroke calibration on the SSD61…

• UL listed for plenum installation

• Reduced power consumption in holding position

• Direct coupled installation without tools (hand-tightened)

• Manual override

• Visual position indication

Application

For use in heating and cooling HVAC applications with Pressure Independent Control

valves. They can be used in chilled/hot water applications or in water-glycol solutions up

to 50% in closed loop systems. The Spring Return SSDx1.5U Series actuators accept

plenum cable or 3/8-inch flex conduit connections.

Product Numbers

Table 1.

Product Number

Description

Operating Mode

Actuator Prefix Code

SSD81U

Floating

Fail-in-place

230

SSD61U

0 to 10 Vdc

Fail-in-place

231

SSD81.5U

Floating

Fail-safe

232

SSD61.5U

0 to 10 Vdc

Fail-safe

233

Summary of content (8 pages)

PAGE 1
Technical Instructions Document No. 155-773 May 8, 2019 Pressure Independent Control Series SSD Electronic Valve Actuators Floating or 0 to 10 Vdc Control Spring Return Description Non-Spring Return Pressure Independent Control Series SSD Electronic Valve Actuators require a 24 Vac power supply and receive a floating control signal (SSD81…) or a proportional 0 to 10 Vdc signal (SSD61…) to control a valve. The 0 to 10V SSD61U actuator also accepts a 24 Vdc power supply.
PAGE 2
Technical Instructions Document No. 155-773 May 8, 2019 Ordering Information Pressure Independent Control SSD Series Electronic Valve Actuators To order a complete valve plus actuator assembly from the factory, combine the actuator prefix code with the suffix of the valve product number. To order an actuator only, use the product number. Specifications Power supply SSD81U Frequency Operating voltage Vdc 24 Vac 20% 50/60 Hz — Power consumption Normal operation At ultra cap load 0.8 VA max. — 2.
PAGE 3
Pressure Independent Control SSD Series Electronic Valve Actuators Technical Instructions Document No. 155-773 May 8, 2019 Accessories ASY97 Conduit connector (quantity one). For SSD61U and SSD81U only. Figure 1. Conduit Connector. Terminal block cover and terminal plug (quantity: one each). For SSD61U and SSD81U only. Figure 2. Terminal Block Cover and. Plug • ASY99 SSD81U actuator floating control. • ASY100 SSD61U actuator 0 to 10 Vdc control.
PAGE 4
Technical Instructions Document No. 155-773 May 8, 2019 Pressure Independent Control SSD Series Electronic Valve Actuators Operation, Continued A 24 Vac control signal to terminal Y1 extends the actuator shaft proportionately to the length of time the signal is applied. SSD81U A 24 Vac control signal to terminal Y2 retracts the actuator shaft proportionately to the length of time the signal is applied.
PAGE 5
Pressure Independent Control SSD Series Electronic Valve Actuators Operation, SSDx1.5U Continued Technical Instructions Document No. 155-773 May 8, 2019 • At power-up (t0), a capacitor must charge to its maximum capacity (Max, tc). This will take a maximum of 180 sec, during which time no actuator movement occurs. • Once the capacitor is fully charged (tc), normal actuator operation occurs.
PAGE 6
Technical Instructions Document No. 155-773 May 8, 2019 Manual Override Pressure Independent Control SSD Series Electronic Valve Actuators The actuator can be driven manually to any position between 0 and 1 with a 3 mm hex wrench. The control signal from the controller, however, will take priority over any manual position. For manual positioning (without power), insert the 3 mm hex wrench in the center of the position indicator. See Figure 7.
PAGE 7
Pressure Independent Control SSD Series Electronic Valve Actuators Technical Instructions Document No. 155-773 May 8, 2019 Wiring, Continued Figure 10. SSD81.5U Neutral Switching Spring Return. Figure 11. SSD81.5U Hot Switching Spring Return for Non-Triac Driven Controllers. Figure 12. SSD81.51U Hot Switching Spring Return for Triac Driven Controllers (TEC, DXR, Others). CAUTION: Terminals must be properly wired for correct function and full life of the actuator. NOTE: SSD81.
PAGE 8
Technical Instructions Document No. 155-773 May 8, 2019 Troubleshooting Pressure Independent Control SSD Series Electronic Valve Actuators Check Wiring for proper connections. If the actuator does not provide full flow or full close-off, check that the actuator is properly attached to the valve. If not: 1. Turn the power off. 2. Manually retract output shaft with 3mm wrench to zero position. 3. Tighten the bonnet ring onto the valve completely. 4. Power up.