Preva Installation/Service Manual, 00-02-1577, Revision E01
30
Installing the Control Unit on a Dual Wood Stud Wall
Wall Plate
Mounting Holes
The mounting template [30-S0003] is a guide for locating where to drill the holes
used to mount the wall plate to the wall. Carefully placing the mounting template
for two stud mount installations on the wall will help ensure correct installation
of the mounting plate and, hence, the Control Unit.
1. Using a stud finder, locate the center of the studs on which the wall plate
will be mounted.
2. Place the mounting template for the two stud mount on the wall with the
lower mounting holes 102 cm (40 in.) above the floor.
3. Place a level parallel to the vertical lines on the mounting template and
adjust the mounting template until it is plumb.
4. Tape the mounting template to the wall.
5. Using an awl or other sharp object, punch through the mounting template to
mark the location of the mounting holes.
6. Drill 5/32” pilot holes (for common pine studs) at the marked locations.
7. Remove the mounting template from the wall and save for future use.
Plate (30-A2042)
In the dual wood wall stud installation, the Control Unit is bolted to a wall plate
that has been installed on two wood studs. The wall plate, shown in Figure 16, is
packaged separately from the Preva.
1. Select the 3/8” x 3” long lag screws [30-H0006] and washers [30-H0008].
2. Put the lag screws and washers through the mounting holes on the wall
plate and loosely tighten. Be sure that the power wire extends through the
opening in the wall plate.
3. Level the wall plate.
4. Tighten the lag screws to 2.0 to 2.5 kg-m (14–18 ft-lb).
Do not over-tighten the lag screws. Over-tightening the lag
screws will damage the wooden stud and reduce the holding
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