Siemens 941 User manual

Installation Instructions

Document No. 546-00085

December 8, 2011

CE Compliant Fume Hood Controller —

Application 941 and 942

Item No. 546-00085. Rev. CA Page 1 of 7

Figure 1. CE Compliant Fume Hood

Controller(Standard enclosure).

Figure 2. CE Compliant Fume Hood Controller

(Otherenclosure).

Control Applications

941 and 942

Product Description

The Fume Hood Controller Board (Figure 1 and

Figure 2) is the main termination board for the Fume

Hood Controller. The board comes with a ferrite filter

to suppress electrical emissions from the 8-

conductor cable. The ferrite filter must be installed to

meet FCC requirements and CE compliance

Product Numbers

546-00705

CE Compliant Fume Hood Controller

— Application 941 and 942 with cover

and mounting rail

546-00705E

CE Compliant Fume Hood Controller

— Application 941 and 942 with FHC

enclosure

NOTE:

Keep the controller board in its static

proof bag until you are ready to install.

Warning/Caution Notation

WARNING

Personal injury/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.

Expected Installation Times

23 minutes.

Required Tools and Materials

•Smallflat-blade screwdriver

Prerequisites

•Fume Hood Controller Enclosure is mounted

and wiring has been roughed-in.

•Operator Display Panel is installed and

cable pulled to location of controller.

Document No. 546-00085

Installation Instructions

December 8, 2011

Page 2 of 7Siemens Industry, Inc.

Instructions

1. If the Fume Hood Controller will be used with a

ﬁeld panel, then disconnect the Field Level

Network (FLN) trunk from the ﬁeld panel.

2. Place the ESD wrist strap on your wrist and

attach it to a good earth ground.

3. Carefully remove the controller board from the

anti-static bag.

4. To mount the controller, do one of the following:

•Center the controller board over the

mounting posts in the bottom of the

controller enclosure (Figure 1). Insert the

corner holes of the board onto the mounting

posts. Press ﬁrmly on the board to snap it

securely into place. Repeat for all

controllers.

•Secure the mounting rail inside the

enclosure at the controller’s desired

location and snap it into place on the

mounting rail (Figure 2). Repeat for all

controllers.

5. After installing all controller boards, verify that

power is OFF. Connect a certiﬁed 24 Vac Class

II power source to the Fume Hood Controller,

see Figure 3.

NOTE:

To meet CE requirements, the

enclosuremust be grounded.

Figure 3. Power Trunk Wiring.

6. Connect the FLN trunk wiring as shown in

Figure 4.

7. After all controllers are connected to the FLN

reconnect the FLN trunk to the ﬁeld panel.

CAUTION

Do not connect an earth ground

to the FLN trunk shield terminal.

The earth ground should be

connected only at the field panel

to prevent ground loop currents.

Figure 4. FLN Trunk Wiring.

8. Connect the point wiring for the appropriate

Fume Hood Controller application as shown in

Figure 7 and Figure 8. The wiring for sashes is

shown in Figure 9 through Figure 14. Red/Signal

and Black/Common polarity must be maintained

on all sash sensors. Terminate both connections

of a 24 Vac load directly to the controller board.

The 24 Vac “H” terminal is switched through a

triac to the NO terminations when the associated

DO is energized.

CAUTION

The Fume Hood Controller DOs

control 24 Vac loads only. The

maximum rating is 12 VA for

each DO. For higher ratings an

interposing relay must be used.

9. Follow the instructions in Figure 5.

CAUTION

Ferrite filter(s) must be installed

on the Operator Display Panel

(ODP) cable. If not, the controller

is not FCC and CE compliant.

Document No. 546-00085

Installation Instructions

December 8, 2011

Siemens Industry, Inc. Page 3 of 7

Figure 5. Installing a Ferrite Filter.

10. Plug the Operator Display Panel cable into the

Operator Display Panel Communication port on

the controller board (Figure 6 and Figure 7).

NOTE:

The ferrite filter must be installed on the

cable inside the enclosure to meet FCC

and CE requirements (Figure 6).

Figure 6. Ferrite Filter Installed.

The installation is complete.

Document No. 546-00085

Installation Instructions

December 8, 2011

Page 4 of 7 Siemens Industry, Inc.

Figure 7. Fume Hood Controller with Damper Wiring (Application 941).

Document No. 546-00085

Installation Instructions

December 8, 2011

Siemens Industry, Inc. Page 5 of 7

Figure 8. Fume Hood Controller with Venturi Air Valve Wiring (Application 942).

Document No. 546-00085

Installation Instructions

December 8, 2011

Page 6 of 7Siemens Industry, Inc.

NOTE:

The wiring shown is based on wiring

sashes from the left side. When wiring

sashes from the right, the wiring is

reversed. The sash closest to the

connector is wired to Red and Black.

The sash farthest from the connector is

wired to White and Black.

Figure 9. Single Vertical Sash Configuration.

Figure 10.Two Horizontal Sash Configuration.

Figure 11.Four Horizontal Sash Configuration.

Figure 12.Two Horizontal/One Vertical Sash

Configuration.

Figure 13. Four Horizontal/One Vertical Sash

Configuration.

Document No. 546-00085

Installation Instructions

December 8, 2011

Information in this document is based on specifications believed correct at the time of publication. The right is reserved to make changes as

design improvements are introduced. APOGEE and Insight are registered trademarks of Siemens Industry, Inc. Other product or company

Siemens Industry, Inc.

Building Technologies Division

1000 Deerfield Parkway

Buffalo Grove, IL 60089-4513

U.S.A

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.546-00085

Printed in the USA

Page 7 of 7

Figure 14. 2 Verticals and up to 8 Horizontals, Walk-in Sash Configuration Wiring Diagram.

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