8
9
920-138-02 (3-04)
920-138-02 (3-04)
MODEL
Flange outward
MODEL
Flange inward
OES/OHS18&24
36.9
OES/OHS18&24
33.9
OES/OHS30&36
41.9
OES/OHS30&36
38.9
OES/OHS42,48&60
43.9
OES/OHS42,48&60
40.8
MOUNTING THE UNIT
Mounting Information
Two holes must be cut in the wall for the supply and return air
openings. (See Figures 7 and 8)
On wood frame walls, the wall may need to be reinforced in
order to hold up to the weight of the unit.
Concrete block walls must be thoroughly inspected to insure
that they can handle the unit weight.
It is the installer's responsibility to insure that hardware used
for mountng of unit is correct for wall material.
New Installation
OES/OHS units are affixed to the wall by way of three
mounting brackets. The bottom bracket supports the majority
of the weight load, and the side brackets hold the unit in place
(See Figures 6 and 7).
Friedrich recommends a 1 inch clearance to combustible
material for the first 3 feet of duct attached to the outlet air
frame.
1.
Locate and mark lag bolt locations and bottom
mounting bracket location. (See Figure 8)
2.
Mount bottom mounting bracket.
3.
Connect the side mounting brackets to the rear
corner posts of the unit. Brackets may be mounted
with flanges outward or inward. See Figure 6
for dimensions for new installation. Friedrich
recommends installing the brackets outward.
4.
Connect the rain flashing to the back flange of the
unit top by using screws in the top panel. Top rain
flashing is shipped secured to the back of the unit.
(See Figure 9)
5.
Position the unit in the opening and secure to the
wall with 5/16 inch lag bolts; use 7/8 inch diameter
flat washers on the lag bolts.
6.
Secure the rain flashing to the exterior wall and caulk
across the entire length of the top. (See Figure 9)
7.
On side by side installations, maintain a minimum
of 20 inches clearance on both sides to allow
access to heat strips and to allow proper airflow
out of the outdoor coil. Additional clearance may
be required to meet local or national codes.
Replacement Installation
Friedrich mounting brackets are removable and can be
mounted in two ways to ensure the bracket holes are in line
with the studs. (See Figure 6)
When doing a replacement project measure the space
between the studs, then look at the chart below, which gives
the space between mounting brackets for all chassis sizes.
Decide in which position the brackets should be mounted
to best match the stud spacing. If the unit is to be installed
with the brackets facing outwards, (Figure 6) first mount the
brackets onto the unit and then secure to the wall. If the unit
is to be installed with the brackets facing inwards (Figure
6), first mount brackets to the wall, then position the unit up
against the wall and secure brackets to the unit.
Flanges Inward
Mount flanges to wall first
Flange Inward
Flanges Outward
Mount flanges to chassis first
Flange Outward
Figure 6
Mounting Options
Summary of Contents for OES Series
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