Bryant 362AAN User Manual

installation, start-up,
and operating instructions

LOW-BOY
OIL-FIRED FURNACE

Cancels: II 362A-75-1 II 362A-105-1

362AAN

Series B

8-96

NOTE: Read the entire instruction manual before starting the
installation.

This symbol → indicates a change since the last issue.
Index Page

SAFETY CONSIDERATIONS..................................................1-2

Minimum Clearance to Combustibles......................................2

INTRODUCTION..........................................................................2

LOCATION ................................................................................2-3

Air for Combustion and Ventilation.....................................2-3

Duct Work Recommendations..................................................3

VENTING INSTRUCTIONS........................................................4

Pre-Installation Vent System Inspection..................................4

Masonry Chimney.....................................................................4

Factory-Built Chimneys............................................................4

Horizontal Venting....................................................................4

OIL BURNER................................................................................4

OIL CONNECTIONS....................................................................4

BAROMETRIC DRAFT CONTROL ...........................................4

ELECTRICAL................................................................................5

FILTERS ........................................................................................5

OPERATIONAL CHECKOUT..................................................5-6

Start-Up.....................................................................................5

Recommended Installation Practices and

Combustion Check...........................................................5-6

Fan Adjustment Check .............................................................6

Limit Control Check.................................................................6

For Year-Round Air Conditioning...........................................6

Heating......................................................................................6

Cooling......................................................................................6

Constant Blower Switch...........................................................6

MAINTENANCE......................................................................6-11

General......................................................................................6

Oil Burner..............................................................................6-7

Heat Exchanger and Flue Pipe..............................................7-8

Blower Oiling and Removal.....................................................8

Keeping Filters Clean...............................................................8

Airflow Data .............................................................................8

Dimensional Drawing...............................................................9

Barometric Damper Locations................................................10

Wiring Diagram......................................................................11

USER’S INFORMATION...........................................................12

Here’s How Your Heating System Works ............................12

Preparing Your Furnace For Operation .................................12

Lighting Your Furnace ...........................................................12

Turning Off Your Furnace .....................................................12

SAFETY CONSIDERATIONS

FOR YOUR SAFETY

DO NOT STORE OR USE GASOLINE OR
OTHER FLAMMABLE VAPORS AND LIQ­UIDS IN THE VICINITY OF THIS OR ANY
OTHER APPLIANCE.

DO NOT ATTEMPT TO START THE BURNER
WHEN EXCESS OIL HAS ACCUMULATED,
WHEN THE FURNACE IS FULL OF VAPOR,
OR WHEN THE COMBUSTION CHAMBER IS
VERY HOT.

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WARNING: For use with grade 2 Fuel Oil maximum.
Do not use Gasoline, Crankcase Oil, or any Oil contain­ing Gasoline! Failure to follow this warning could lead to
sooting, fire, explosion, and/or severe bodily harm.

CAUTION: Never burn garbage or paper in the heating
system and never leave rags, paper, or any flammable
items around the unit.

CAUTION: These instructions are intended to be used
by qualified personnel who have been trained in installing
this type of furnace. Installation of this furnace by an
unqualified person may lead to equipment damage and/or
a hazardous condition which may lead to bodily harm.

All local and national code requirements governing installation of
oil burning equipment, wiring, and flue connections must be
followed. Some of the codes (issued by the Canadian Standards
Association, the National Fire Protection Agency, and/or the
American National Standards Institute) that may be applicable are:

ANSI/NFPA 31 INSTALLATION OF OIL BURNING

EQUIPMENT

ANSI/NFPA 211 CHIMNEYS, FIREPLACES, VENTS,

AND SOLID FUEL BURNING
APPLIANCES

ANSI/NFPA 90B WARM AIR HEATING AND AIR

CONDITIONING SYSTEMS

—1—

ANSI/NFPA 70 NATIONAL ELECTRICAL CODE
CSA B139 INSTALLATION CODE FOR

OIL BURNING EQUIPMENT

CSA C22.1 CANADIAN ELECTRICAL CODE

Only the latest issues of above codes should be used, and are
available from either The National Fire Protection Agency, Bat­terymarch Park, Quincy, MA 02269 or The Canadian Standards
Association, 178 Rexdale Blvd., Rexdale, Ontario M9W 1R3

Recognize safety information. This is the safety-alert symbol
When you see this symbol on the furnace and in instructions or
manuals, be alert to the potential for personal injury.

Understand the signal words DANGER, WARNING, and CAU­TION. These words are used with the safety-alert symbol. DAN­GER identifies the most serious hazards which will result in severe
personal injury or death. WARNING signifies a hazard which
could result in personal injury or death. CAUTION is used to
identify unsafe practices which would result in minor personal
injury or product and property damage.

TABLE 1—MINIMUM CLEARANCES TO COMBUSTIBLE

MATERIALS (IN.)

UNIT APPLICATION LOW-BOY

Furnace 0

Sides

Supply Plenum and Warm-Air Duct Within 6 ft
of Furnace

Back 0

Furnace Casing or Plenum 2

Top

Horizontal Warm-Air Duct Within 6 ft of
Furnace

Bottom 0*

Horizontally or Below Pipe 4

Flue
Pipe

Vertically Above Pipe 8

Front 8

* Floor may be combustible.
NOTE: Adequate service clearance should be provided over and above these
dimensions as required.

INTRODUCTION

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The model 362AAN Furnaces are available in sizes 105,000
through 155,000 Btuh input capacities.

The furnace is shipped as a packaged unit, complete with burner
and controls. It requires a line voltage (115 vac) connection to
control box, a thermostat hook-up as shown on wiring diagram, oil
line connection(s), adequate duct work, and connection to a
properly sized vent.

The air handling capacity of this furnace is designed for cooling
airflow. Refer to Table 5 for expected airflows at various external
duct static pressures.

LOCATION

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 com­ponents 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.

In a basement or when installed on the floor, it is recommended
that unit be installed on a concrete pad that is 1- to 2-in. thick.

On dirt floors, furnace may be installed on concrete blocks. Place
blocks under all 4 corners and under center of furnace. Center

.

block 22 in. from back of furnace forward.
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.

I. AIR FOR COMBUSTION AND VENTILATION

WARNING: Installation of this furnace in an area where

it will receive contaminated combustion air must be
avoided. Such contamination would include the follow­ing: ammonia, chlorine, hydrogen sulfide, halogenated
hydrocarbons, carbon tetrachloride, cleaning solvents,
hydrochloric acid, water softening chemicals, and similar

1

chemicals. Failure to follow this warning will lead to
premature rusting of heat exchanger and possible prema­ture furnace failure and/or vent failure which could result
in fire hazard and/or bodily harm.

2

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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.

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In unconfined spaces in buildings of conventional frame, brick, or
stone construction, infiltration MAY be adequate to provide air for
combustion, ventilation, and dilution of flue gases. This determi­nation must be made on an individual installation basis and must
take into consideration the overall volume of unconfined space, the
number of windows and ventilation openings, the number of doors
to the outside, internal doors which can close off unconfined space,
and overall tightness of building construction. Consideration must
also be given to the amount of storage items (furniture, boxes, etc.)
within the unconfined space which take away from the air volume.

Many new buildings and homes (and older ones that have been
weatherized) MUST BE considered as being of tight construction,
therefore, infiltration will not be sufficient to supply necessary air
for combustion and ventilation.

A building can be considered as being of tight construction when:

1. Walls and ceilings exposed to outside atmosphere have a
continuous water vapor retarder with a rating of 1 perm or
less with openings gasketed or sealed, and/or

2. Weatherstripping has been added on operable windows and
doors, and/or

—2—

3. Caulking or sealants are applied to areas such as joints
around window and door frames; between sole plates and
floors; between wall-ceiling joints; between wall panels; at
penetrations for plumbing, electrical, and fuel lines; and at
other openings.

If combustion and ventilation air must be supplied to an uncon­fined space from outside, an opening with a FREE AREA of not
less than 1 sq in. per 1000 Btuh of total input of all appliances
within unconfined space (but not less than 100 sq in.) must be
provided. This opening must be located such that it can not be
blocked at any time.

When furnace is installed in a closet or enclosure, 2 ventilation
openings, with OPEN AREA as dimensioned in example below
are required for combustion air. The openings should be located
about 6 in. from top and bottom of enclosure at front of furnace.

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For Example:

UNIT
SIZE

036105 18 9
048125 20 10
060155 20 10

LENGTH

(IN.)

HEIGHT

(IN.)

For a confined space, where air is taken from an interior space, 2
permanent openings of equal area are required. One opening must
be within 12 in. of ceiling and the other within 12 in. of floor. Each
opening must have a free area of at least 1 sq in. per 1000 Btuh of
total input rating but not less than 100 sq in.

If outside air is supplied to a confined space, then the 2 openings
must be equal and located as above. The free area of each must be:

1. One sq in. per 4000 Btuh of total input rating when air is
directly communicated from outdoors.

2. One sq in. per 4000 Btuh of total input rating when air is
brought in through vertical ducts.

3. One sq in. per 2000 Btuh of total input rating when air is
transferred through horizontal ducts.

When ducts are used to supply air, they must be of the same cross
sectional area as free area of openings to which they connect.

The minimum dimension of rectangular air ducts must not be less
than 3 in.

In calculating free area, consideration shall be given to blocking
effect of louvers, grilles, or screens protecting openings. Screens
used shall not be smaller than 1/4-in. mesh and shall be readily
accessible for cleaning. If free area through a design of louver or
grille is known, it shall be used in calculating size design and free
area specified. If design and free area are not known, it may be
assumed that wood louvers have 20 percent free area and metal
louvers and grilles have 60 percent free area. Louvers shall be
fixed in open position or interlocked with furnace so they open
automatically at furnace start-up and remain open during furnace
operation.

WARNING: Do not block combustion-air openings in
the furnace. Any blockage will result in improper com­bustion which may result in a fire hazard and/or cause
bodily harm.

5. Lockouts on start-up.

II. DUCT WORK RECOMMENDATIONS

The proper sizing of warm air ducts is necessary to ensure
satisfactory furnace operation. Duct work should be in accordance
with the latest editions of NFPA-90A (Installation of Air Condi­tioning and Ventilating Systems) and NFPA-90B (Warm Air
Heating and Air Conditioning Systems) or Canadian equivalent.

The supply duct work should be attached to flanged opening
provided at discharge end of furnace. See Fig. 5 for dimensions of
this opening.

The following recommendations should be followed when install­ing duct work:

1. Install locking-type dampers in all branches of individual
ducts to balance out system. Dampers should be adjusted to
impose proper static at outlet of furnace.

2. A flexible duct connector of noncombustible material
should be installed at unit on both supply- and return-air
systems. In applications where extremely quiet operation is
necessary, the first 10 ft (if possible) of supply and return
ducts should be internally lined with acoustical material.

3. In cases where return-air grille is located close to fan inlet,
there should be at least one 90° air turn between fan inlet
and grille. Further reduction in sound level can be accom­plished by installing acoustical air turning vanes or lining
duct as described in item 2 above.

4. When a single air grille is used, duct between grille and
furnace must be the same size as return opening in furnace.

CAUTION: Return-air grilles and warm air registers
MUST not be obstructed.

WARNING: When supply ducts carry air circulated by
furnace to areas outside spaces containing furnace, return
air MUST also be handled by a duct sealed to furnace
casing and terminating outside space containing furnace.
Incorrect duct work termination and sealing will create a
hazardous condition which could lead to bodily harm.

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 dis­charge side of furnace. Under no circumstances should
airflow be such that cooled, conditioned air can pass over
furnace heat exchanger. This will cause condensation in
heat exchanger and possible failure of heat exchanger
which could lead to a fire hazard and/or a hazardous
condition which may lead to bodily harm. Heat exchanger
failure due to improper installation may not be covered by
warranty.

The lack of a proper amount of combustion air can lead to serious

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furnace operational problems. Some of these problems are:

1. Excessive oil burner after drip and oil fumes.

2. Sooting.

3. Melted oil burner couplings and/or ignitor/relay control.

4. A condition where air band or air shutter settings must be
more open than normal to achieve proper combustion.

2. In parallel airflow applications, dampers must be provided
to direct air over furnace heat exchanger when heat is
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.

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VENTING INSTRUCTIONS

Venting of furnace should be to the outside and in accordance with
local codes or requirements of local utility.

OIL-FIRED APPLIANCES SHALL BE CONNECTED TO
FLUES HAVING SUFFICIENT DRAFT AT ALL TIMES TO
ENSURE SAFE AND PROPER OPERATION OF APPLIANCE.

For additional venting information, refer to ANSI/NFPA 211
Chimney, Fireplaces, Vents, and Solid Fuel Burning Appliances
and/or CSA B139 Installation Code.

This furnace is certified for use with Type "L" vent (maximum flue
gas temperature 575°F).

I. PRE-INSTALLATION VENT SYSTEM INSPECTION

Before furnace is installed, it is highly recommended that any
existing vent system be completely inspected.

For any chimney or vent, this should include the following:

1. Inspection for any deterioration in chimney or vent. If
deterioration is discovered, chimney must be repaired or
vent must be replaced.

2. Inspection to ascertain that vent system is clear and free of
obstructions. Any blockage must be cleared before install­ing furnace.

3. Cleaning chimney or vent if previously used for venting a
solid fuel burning appliance or fireplace.

4. Confirming that all unused chimney or vent connections are
properly sealed.

5. Verification that chimney is properly lined and sized per the
applicable codes. (Refer to list of codes in Safety Consid­erations section.)

II. MASONRY CHIMNEY

This furnace can be vented into an existing masonry chimney. This
furnace must not be vented into a chimney servicing a solid fuel
burning appliance. Before venting furnace into a chimney, the
chimney MUST be checked for deterioration and repaired if
necessary. The chimney must be properly lined and sized per local
or national codes.

If furnace is vented into a common chimney, the chimney must be
of sufficient area to accommodate the total flue products of all
appliances vented into chimney.

The following requirements are provided for a safe venting
system:

1. Be sure that chimney flue is clear of any dirt or debris.

2. Be sure that chimney is not servicing an open fireplace.

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3. Never reduce pipe size below minimum certified furnace
pipe size as shown in Table 2.

TABLE 2—MINIMUM CERTIFIED FURNACE PIPE SIZE

(IN.)

UNIT SIZE MINIMUM PIPE DIAMETER

036105 5
048125 5
060155 6

4. All pipe should be supported using proper clamps and/or
straps. These supports should be at least every 4 ft.

5. All horizontal runs of pipe should have at least 1/4-in. per
ft of upward slope.

6. All runs of pipe should be as short as possible with as few
turns as possible.

7. Seams should be tightly joined and checked for leaks.

8. The flue pipe must not extend into chimney but be flush
with inside wall.

9. The chimney must extend 3 ft above highest point where it
passes through the roof of a building and at least 2 ft higher
than any portion of a building within a horizontal distance
of 10 ft. It shall also be extended at least 5 ft above highest
connected equipment flue collar.

10. Check local codes for any variance.

III. FACTORY-BUILT CHIMNEYS

Listed factory-built chimneys may be used. Refer to chimney
manufacturer’s instructions for proper installation.

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IV. HORIZONTAL VENTING

This furnace may be vented horizontally through an outside wall
when installed with 1 of the following auxiliary inducer blowers:

Tjernlund Products, Inc. Model SS1 (SS1C required in Canada)
available from: Tjernlund Products, Inc.

1601 Ninth Street
White Bear Lake, MN 55110-6795
[phone]

or

Fields Controls Model SWGII-5
(with a CK-60 or CK-61 control kit)

available from: Fields Controls Company

2308 Airport Road
Kinston, NC 28051
[phone]

NOTE: In both cases, the 24-v wiring schematic included with
inducer is the recommended wiring setup.

The use of either inducer can create a negative pressure in the area
where furnace is located if the proper combustion-air openings are
not available. This negative pressure can lead to excessive heat
being retained in heat exchanger, coking, and fumes. Refer to
NFPA-31 Section 1.5 for proper combustion-air requirements.

CAUTION: USE METALLIC VENT PIPE ONLY!
PLASTIC VENTING MATERIALS ARE PROHIB­ITED!

OIL BURNER

This furnace is supplied with a high-pressure atomizing retention
head type burner (for use with not heavier than grade 2 Fuel Oil).
The air tube length, from face of mounting plate to extreme face of
end cone, should be as shown in Table 3.

→ TABLE 3—OIL BURNER AIR TUBE LENGTH

UNIT SIZE LENGTH (IN.)

036105 5
048125 5
060155 7

OIL CONNECTIONS

Complete instructions for installation of fuel oil piping will be
found in oil burner Installation Instructions included with furnace.

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Oil line entry holes are provided in side panels. Two holes are
provided in each location so that a 2-pipe system may be used if
desired.

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A properly sized oil filter should be used with all oil burners and
should be installed as close to burner as possible. For a 2-pipe
system, a minimum capacity of 25 gph is needed.

BAROMETRIC DRAFT CONTROL

The barometric draft control shipped with furnace MUST be used
with furnace to ensure proper operation. Instructions for installing
control are packed with control. Refer to Fig. 6 for suggested
locations.

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