Cambridge Engineering, Inc.
16
M-Series Technical Manual
INSTALLATION INSTRUCTIONS
HORIZONTAL MOUNT - THRU WALL CONFIGURATION
m
WARNING:
Due to the size and weight of this equipment, it is
recommended that the heater support structure be
reviewed and approved by a qualified structural engi-
neer before installing this equipment.
IMPORTANT
Before proceeding with the installation, verify the fea-
sibility of the location selected with respect to acces-
sibility to the equipment for service and maintenance
functions.
IMPORTANT
To minimize snow and rain ingestion, position the heat-
er inlet opposite the prevailing wind.
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CAUTION:
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 contami-
nants to be drawn into the heater. Consult local
codes for applicable building code provisions for
ventilation air.
1. Prepare the wall for installation. (See pages 17-18 for
wall opening dimensions for your specific heater.)
IMPORTANT
Accurate measurements are critical and will affect the
installation process.
2. Install heater support rods per the structural engi-
neer’s recommendations.
3. Use a crane or comparable lifting device to raise and
position equipment. Block the heater where neces-
sary. Use a spreader bar to prevent damage and con-
nect slings to the lifting brackets.
IMPORTANT
Cambridge Engineering recommends mounting the
heater’s rainhood a minimum of 24" off the ground or
other surfaces.
4. Apply washers and double lock nuts to secure equip-
ment on hanging rods. Note: The discharge end of
the heater should be raised slightly (1/8
"
above level)
to allow ingested moisture to drain from the heater.
5. Apply shims at the bottom of the rainhood to take up
slack in the opening, leaving a small joint between
the top of the heater and the wall.
6. Install fiberglass insulation in the gaps between the
wall opening and the inlet collar. Apply enough
material to accommodate the full thickness of the
wall.
7. Install finish trim pieces (by others) to the top, sides
and bottom of the inlet collar on both the inside and
the outside wall surfaces.
8. Apply a bead of latex based polyurethane caulk that
best matches the color of the exterior wall surface
of the facility and/or the color of the heater accessories
at the joint between the top inlet collar and outside wall
surface. Make certain this is a continuous bead and
that it runs the entire width of the collar. Caulk all other
exposed joints.
9. Install the discharge plenum, where used, by screw-
ing the plenum to the heater or to the discharge duct,
as applicable. Install hanging rods from the ceiling
supports to the plenum’s support brackets.