M-Series Technical Manual
13
Cambridge Engineering, Inc.
INSTALLATION INSTRUCTIONS
HORIZONTAL MOUNT - OUTDOOR PAD MOUNT CONFIGURATION
m
WARNING:
Due to the size and weight of this equipment, it
is recommended 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 for accessibility to the
equipment for service and maintenance functions.
IMPORTANT
To minimize snow and rain ingestion, position the
heater 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.
IMPORTANT
For model M140 heaters, refer to the “Field Assembly
Instructions” worksheets included with this manual for
detailed heater assembly directions.
1. Prepare the wall for installation. (See pages 14-15
for wall opening dimensions for your specific
heater.)
IMPORTANT
Accurate measurements are critical and will affect in-
stallation process.
2. Assemble and secure the support structure per the
structural engineer’s recommendations.
IMPORTANT
The support structure should be installed such that the
heater will sit level.
3. Use a crane or comparable lifting device to raise and
position the equipment. Block the heater where
necessary. Use a spreader bar to prevent damage and
connect slings to the lifting brackets.
IMPORTANT
Cambridge Engineering recommends mounting the
heater a minimum of 24" off the mounting surface in
areas where snow accumulation could impact heater
operation.
4. Caulk all joints of the heater’s accessories installed
in the field. Use a clear or gray latex based polyure-
thane caulking to prevent water leaks.
5. Install the discharge duct through the wall opening.
6. Install fiberglass insulation in the gaps between the
wall opening and discharge duct. Apply enough
insulation material to accommodate the full thick-
ness of the wall.
7. Install finish trim pieces (by others) to the top, sides
and bottom of the discharge duct on both the inside
and 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 discharge duct and outside
wall surface. Make certain this is a continuous bead and
that it runs the entire width of the duct. Caulk all other
exposed joints.
9. Install the discharge plenum, where used, by screw-
ing the plenum to the discharge duct. Install hanging
rods from the ceiling supports to the plenum’s sup-
port brackets.