Cambridge Air Solutions
8
SA-Series Technical Manual
INSTALLATION INSTRUCTIONS
THRU WALL MOUNTING
WARNING:
It is recommended the heater mounting structure
be reviewed and approved by a qualified structural
engineer and the roof manufacturer before
installing this equipment.
IMPORTANT
Before proceeding with the installation, verify the
feasibility of the location selected with respect
to accessibility to the equipment for service and
maintenance functions.
IMPORTANT
To prevent contaminated air from being drawn
into the heater, install the heater’s inlet at least 10
feet from any building exhaust, process exhaust,
sewer stacks, or other sources that would allow
contaminants to be drawn into the heater. Consult
local codes for additional references.
1. For square duct - prepare wall penetration for
inlet collar to the dimensions below.
For round duct - prepare wall penetration to
accommodate the inlet duct (by others).
2. For square duct - Connect the inlet collar and the
rain hood to the unit prior to lifting the heater in
place.
For round duct - Attach the inlet duct to the rain
hood. Lift the rain hood and inlet duct into place
and attach to the wall.
3. Install hanging rods to adequate ceiling supports
and align with the hanging brackets on the unit.
Locate the hanging rods so that the weep holes
provided in the rain hood are located a minimum
of 3" beyond the outside wall surface.
4. Install the hanging brackets on the heater.
5. Use a forklift or comparable lifting device to
raise and position the heater. Take precautions
to prevent equipment damage (dents and/or
scratches) when the heater is being lifted into
position.
6. Use washers and double lock nuts to secure the
unit on the hanging rods.
7. For round duct - Attach the inlet duct to the
inlet transition.
IMPORTANT
The discharge end of the heater should be raised
slightly (1/8" above level) to slope the rain hood so
any ingested moisture will run outside the building.
8. Install fiberglass insulation in the gaps around
the wall opening. Apply enough material to
accommodate the full thickness of the wall.
9. Install finish trim pieces (by others) to the top,
sides and bottom of the wall opening on both the
inside and outside wall surfaces.
10. Apply silicone caulk at the joint between the top
of the rain hood and the outside wall surface.
Make certain this is a continuous bead and that it
runs the entire width of the rain hood. Caulk all
other exposed joints.
11. Install the directional elbows. Consult the job
layout for the orientation of the elbows.
Weight
Hanging Rods
Wall Opening
Model
Qty.
Size
A
B
H
W
SA250
220 lbs.
4
3/8" dia.
53"
23.16"
23"
23"
SA350
550 lbs.
4
3/8" dia.
58"
33.25"
25"
27.5"
