Installation Instructions

Document No. 546-14402
Installation Instructions
December 8, 2011
Page 2 of 6 Siemens Industry, Inc.
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: The FHC, the averaging module, any 0
to 10 Vdc actuator used by the LRC,
and the LRC cannot share a single
power trunk. The preferred
configuration for shared power trunks is
one trunk for the averaging module and
FHC and another trunk for the
actuator(s) and LRC. The Lab Controls
Electronic Actuator Assemblies can be
on the same power trunk as the FHC or
LRC or can be on a separate
transformer.
NOTE: To meet CE requirements, the
enclosure must 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 6. The wiring for vertical sashes is shown
in Figure 8 through Figure 11. The wiring for
horizontal and combination sashes is shown in
Figure 12 through Figure 15. Red/Signal and
Black/Common polarity must be maintained on
all sash sensors. Terminate any unused sash
sensor wires to the sash shield, TB4 pin 12.
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.
Figure 5. Installing a Ferrite Filter.