Cambridge Engineering, Inc.
2
M-Series Technical Manual
HAZARD SUMMARY
The following safety precautions apply to the installa-
tion, operation, and maintenance of the equipment
described by this technical manual.
m
WARNING:
Any unauthorized modification of this equipment
shall void the warranty.
m
WARNING:
Only qualified personnel should attempt instal-
lation, service, and repair of this equipment. Use
extreme caution and observe safety regulations at
all times.
m
WARNING:
Recirculation of room air is not permitted.
Adequate building relief shall be provided so as to not
over-pressurize the building when the make-up air heat-
ing system is operating at its rated capacity. It should be
noted that this can be accomplished by taking into
account, through standard engineering methods, the
structure’s designed infiltration rate, by providing prop-
erly sized relief openings, by interlocking a powered
exhaust system, or by a combination of these methods.
If the failure or malfunction of this heater creates a haz-
ard to other fuel burning equipment in the building (e.g.
when the heater is providing the make-up air to a boiler
room), the heater is to be interlocked to open inlet air
dampers or other such devices.
If the heater is installed such that an inlet duct is uti-
lized, the duct system must be purged with at least four
air changes prior to an ignition attempt.
IMPORTANT
Installation in Aircraft Hangars
Refer to the Standard for Aircraft Hangars, ANSI/
NFPA 409, for specific information on the installation
requirements for these heaters in airplane hangars.
IMPORTANT
Installation in Parking Garages
Refer to the Standard for Parking Structures, ANSI/
NFPA 88A, or the Standard for Repair Garages, ANSI/
NFPA 88B, for specific information on the installation
requirements for these heaters in public garages.
If in doubt regarding installation or application,
contact Cambridge Engineering Customer Service
Group at 800-473-4569 during the hours of 8:00 a.m.
to 5:00 p.m. Central Time, Monday through Friday.
Hazard Identification
Warnings and Cautions appear at appropriate sections throughout this manual. Read these carefully.
m
WARNING:
Indicates a potentially hazardous situation which could result in
death or serious injury.
m
CAUTION:
Indicates a potentially hazardous situation which may result in
minor or moderate injury. It may also be used to alert against
unsafe practices.
CAUTION:
Indicates a situation that may result in accidents with equipment or
property damage only.
