Installation Instructions

Document No. 546-14407

August 14, 2013

Page 2 of 6 Siemens Industry, Inc.

Figure 1. LCM-OAVS with BTU Compensation, HW Reheat and Two Fast Dampers (One Exhaust, One Supply).

Installation Instructions

NOTE: Follow all safety regulations and local codes

when installing this equipment.

1. Using the mounting rail as a template (Figure

1), mark the screw holes where you will install

the LCM-OAVS.

2. Do one of the following:

• If using self-tapping screws, fasten the

mounting rail using a drill and hex nut bit.

• If not using self-tapping screws, drill two 1/8-

inch (3 mm) pilot holes, then fasten the

mounting rail with No. 6 or No. 8 screws.

3. With the ESD wrist strap attached to your wrist

and a good earth ground, remove the controller

from the anti-static bag and snap it securely into

place on the mounting rail.

4. If the LCM-OAVS will be used with a field panel,

disconnect the field level network (FLN) trunk

from the field panel.

5. Wire the FLN trunk to the LCM-OAVS (Figure 2).

After all controllers are connected to the FLN,

reconnect the FLN trunk to the field panel.

Figure 2. FLN Trunk Wiring.

6. If the LCM-OAVS requires Offboard Air

Modules, install them now following the

Installation Instructions (550-819).

7. Connect the point wiring. See Wiring Diagrams.

CAUTION:

DO Wiring – Each DO provides a

Normally Open (NO) terminal and a

Common (C) terminal. To reduce noise

and the potential for ground loops, both

connections of a 24 Vac load must be

wired directly to the DO terminals on the

controller board.

CAUTION:

The LCM-OAVS DOs control 24 Vac

loads only. The maximum rating is 12 VA

for each DO. Use an interposing 220V

relay module for VA requirements higher