3
This equipment must be installed and wired in accordance
with regulations of the National Board of Fire Under-
writers, National Electrical Code, and local governing bodies.
The following recommendations are not intended to
supplant any requirements of federal, state, or local codes
having jurisdiction. Authorities having jurisdiction should be
consulted before installations are made. Local codes may
require additional safety controls and/or interlocks.
All installations in airplane hangers must be in accordance
with current ANSI/NFPA No. 409. All installations in public
garages must be in accordance with the current Standard
for Parking Garages, NFPA No. 88A, or the Standard for
Repair Garages, NFPA No. 88B, and with CAN/CGA B149
Installation Codes.
CAUTION: Do not install heating system in
corrosive or flammable atmospheres! Premature
failure of, or severe damage to the unit will result!
CAUTION: Heating system must not be installed
in locations where air for combustion would contain
chlorinated, halogenated or acidic vapors. If located
in such an environment, premature failure of the
unit will occur!
A. Handling the Equipment
The Direct Gas-Fired unit has been designed for rigging
and handling through the use of special lifting lugs installed
on the ends of each unit. As explained previously, the basic
unit is designed for shipping in one piece where shipping
limitations allow. Some optional accessories may require
field mounting.
When unloading and setting the unit, use the lifting lugs
provided or move the equipment on rollers. Hooks, jacks
or chains must not be used around the casing, main control
panel or exterior mounted controls.
During transit, unloading and setting of the unit, bolts and
nuts may have become loosened, particularly in the pillow
block ball bearing assemblies in the fan section. It is
recommended that all nuts and set screws be tightened.
Turn fan shaft by hand to make certain that blower does
not rub against blower housing, and that bearing set screws
are tight.
Open the cover on the electrical control box located on
the unit. Inspect all wire terminals and wiring terminations
to ensure that all connections are tight.
If this unit is not installed immediately, cover all openings
that might be exposed to the weather. Rotate fan monthly.
B. Locating the Unit
Prior to locating the unit, authorities having jurisdiction
should be consulted before installations are made. Approval
permits should be checked against the unit received.
Recirculation of room air is not permitted. All air must be
ducted from the outdoors.
If in doubt regarding the application of this appliance,
consult the factory.
Locate the unit exactly level. Special attention should be
given to the duct, electrical, and fuel connection points.
Install duct work with adequate flexible connections to
isolate vibrations from the duct work. All duct work should
have taped or caulked seams. Duct work should be
properly sized so as not to inhibit airflow. This information
should be cross-checked with the position of support
beams and stand pipes to insure that clearance dimensions
coincide with those of the unit. The minimum clearance to
combustible material must be maintained as listed in Table 1.
On outdoor curb mounted installations, flash and seal roof
curb to prevent leakage. The cross section of factory
provided curb is formed to accept wood nailing strip and
insulation provided by others.
C. Location of Accessories
Where applicable, standard or optional accessories will
be placed inside the fan section of the unit for shipment,
and must be removed and installed by the mechanical or
electrical contractor.
Field provided discharge or inlet dampers must be
equipped with an end switch and interlocked to insure
maximum design opening before starting and running
circuits may be energized.
Field constructed intake accessories should be properly
designed to minimize the entry of rain and snow.
Adequate building relief must be provided, so as to not
over-pressurize the building, when the heater is operating at
its rated capacity. This can be accomplished by taking into
account, through standard engineering methods, the struc-
ture’s designed infiltration rate, by providing properly sized
relief openings, by interlocking a powered exhaust system,
or by a combination of these methods.
SECTION III - INSTALLATION
Table 1
Minimum clearance to combustible material and access
clearance (consult local codes and regulations)
Clearances to Combustible Material
Vertical Units
Horizontal Units
Front*
36 inches
36 inches
Rear
6 inches
6 inches
Right
6 inches
6 inches
Left
6 inches
6 inches
Top
12 inches
12 inches
Floor Zero
6
inches
* Consider control side as front of unit.
