Cambridge Air Solutions
6
SA-Series Technical Manual
INSTALLATION INSTRUCTIONS
ROOF TOP 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 minimize snow and rain ingestion, position the
heater inlet opposite the prevailing winds.
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. Prepare roof penetration to the dimensions below.
Prepare gas and electric penetrations.
IMPORTANT
Accurate measurements are critical and will affect
the installation process.
2. Secure the mounting curb and mounting
stands per the structural engineer and roof
manufacturer’s recommendations.
IMPORTANT
The roof curb and mounting stands should be
installed so that the heater will mount level.
Cambridge recommends mounting the heater 24"
off the roof surface in areas where snow
accumulation could impact heater operations.
3. Lower the discharge duct through the mounting
curb and the roof opening and secure the
counterflashing to the mounting curb.
4. 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.
WARNING:
Do not attach lifting means to heater accessories.
Make connections to heater only.
IMPORTANT
Inlet accessories may be attached on the ground or
on the roof depending on the method chosen by the
installer.
5. Using the adjustable mounting stand, lower the
heater inlet slightly (1/8" below level) so that any
ingested moisture will drain out of the heater and
onto the roof surface.
6. Caulk all the joints between the heater and the
accessories with silicone caulk to prevent water
leaks.
7. Seal all roof penetrations to prevent roof leaks.
8. Install the directional elbows. Consult the job
layout for the orientation of the elbows.
Weight
A
B
Roof Opening
Model
L
W
SA250
265 lbs.
48.25”
21.17”
8.5"
16"
SA350
550 lbs.
65.5”
25.5”
13"
25"
