Minimum Clearance To Combustibles; Location; General; Location Relative To Cooling Equipment - Bryant LOW-BOY 367AAN Installation And Operating Instructions Manual

TABLE 1—MINIMUM CLEARANCES TO
COMBUSTIBLE MATERIALS (IN.)
UNIT APPLICATION
Furnace
Sides
Supply Plenum and Warm-Air Duct Within 6 ft
of Furnace
Back Service Clearance
Furnace Casing or Plenum
Top
Horizontal Warm-Air Duct Within 6 ft of
Furnace
Bottom*
Horizontally or Below Pipe
Flue
Pipe
Vertically Above Pipe
Front
* Floor may be combustible.
NOTE: Adequate service clearance should be provided over and above these
dimensions as required.
The air handling capacity of this furnace is designed for cooling
airflow. Refer to Table 7 for expected airflows at various external
duct static pressures.

LOCATION

I. GENERAL
WARNING: This furnace is not water tight and is not
designed for outdoor installation. This furnace shall be
installed in such a manner as to protect electrical com-
ponents from water. Outdoor installation would lead to a
hazardous electrical condition and to premature furnace
failure.
WARNING: Do not use this furnace as a construction
heater. Use of this furnace as a construction heater
exposes furnace to abnormal conditions, contaminated
combustion air, and lack of air filters. Failure to follow
this warning can lead to premature furnace failure and/or
vent failure which could result in a fire hazard and/or
bodily harm.
This furnace is approved for reduced clearances to combustible
construction, therefore, it may be installed in a closet or similar
enclosure. It may be located in a basement or on the same level as
area to be heated. In any case, unit should always be installed level.
The required minimum clearances for this furnace are specified in
Table 1.
The furnace should be located as close as possible to chimney or
vent in order to keep vent connections short and direct. The
furnace should also be located as near as possible to center of air
distribution system.
II. LOCATION RELATIVE TO COOLING EQUIPMENT
When installing furnace with cooling equipment for year-round
operation, the following recommendations must be followed for
series or parallel airflow:
1. In series airflow applications, coil is mounted after furnace
in an enclosure in supply-air stream. The furnace blower is
used for both heating and cooling airflow.
WARNING: The coil MUST be installed on air dis-
charge side of furnace. Under no circumstances should
LOW-BOY
airflow be such that cooled, conditioned air can pass over
1
furnace heat exchanger. This will cause condensation in
heat exchanger and possible failure of heat exchanger
1
which could lead to a fire hazard and/or a hazardous
19
condition which may lead to bodily harm. Heat exchanger
2
failure due to improper installation may not be covered by
warranty.
2
0
4
2. In parallel airflow applications, dampers must be provided
9
to direct air over furnace heat exchanger when heat is
8
desired and over cooling coil when cooling is desired.
IMPORTANT: The dampers should be adequate to prevent
cooled air from entering furnace. If manually operated, dampers
must be equipped with a means to prevent operation of either
cooling unit or furnace unless damper is in full cool or heat
position.
WARNING: Installation of this furnace in an area where
it will receive contaminated combustion air must be
avoided. Such contamination would include the follow-
ing: ammonia, chlorine, hydrogen sulfide, halogenated
hydrocarbons, carbon tetrachloride, cleaning solvents,
hydrochloric acid, water softening chemicals, and similar
chemicals. Failure to follow this warning will lead to
premature rusting of heat exchanger and possible prema-
ture furnace failure and/or vent failure which could result
in fire hazard and/or bodily harm.
WARNING: Do not block combustion-air openings in
the furnace. Any blockage will result in improper com-
bustion which may result in a fire hazard and/or cause
bodily harm.
I. GENERAL
This furnace should be installed in a location in which facilities for
ventilation permit satisfactory combustion of oil, proper venting,
and maintenance of ambient temperature at safe limits under
normal conditions of use. The location should not interfere with
proper circulation of air within the confined space. (See NFPA-31,
Section 1.5.)
In addition to air needed for combustion, process air shall be
provided as required for: cooling of equipment or material,
controlling dew point, heating, drying, oxidation or dilution, safety
exhaust, and odor control.
In addition to air needed for combustion, air shall be supplied for
ventilation, including all air required for comfort and proper
working conditions for personnel.
The barometric draft regulator (included with furnace) shall be
installed in same room or enclosure as furnace in such a manner as
to prevent any difference in pressure between regulator and
combustion-air supply.
Air requirements for operation of exhaust fans, kitchen ventilation
systems, clothes dryers, and fireplaces shall be considered in
determining the adequacy of a space to provide combustion-air
requirements.
The lack of a proper amount of combustion air can lead to serious
furnace operational problems. Some of these problems are:
1. Excessive oil burner after drip and oil fumes.
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AIR FOR COMBUSTION AND VENTILATION