Bryant 367AAN User Manual

installation, start-up,
and operating instructions

LOW-BOY
OIL FURNACE

NOTE: Read the entire instruction manual before starting the
installation.
This symbol → indicates a change since last issue.

INDEX

Page

SAFETY CONSIDERATIONS..................................................1-3

Dimensional Drawing...............................................................2

Minimum Clearance to Combustibles......................................3

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

LOCATION....................................................................................3

General......................................................................................3

Location Relative to Cooling Equipment ................................3

AIR FOR COMBUSTION AND VENTILATION...................3-5

General...................................................................................3-4

Unconfined Space.....................................................................4

Confined Space......................................................................4-5

DUCT WORK RECOMMENDATIONS......................................5

VENTING ......................................................................................5

Vent System Inspection............................................................5

Masonry Chimneys...................................................................5

Factory-Built Chimneys............................................................5

OIL BURNER................................................................................5

OIL CONNECTIONS....................................................................6

BAROMETRIC DRAFT CONTROL ...........................................6

ELECTRICAL CONNECTIONS............................................6-7-8

115-v Wiring.............................................................................6

24-v Wiring...............................................................................6

Accessories................................................................................6

Wiring Diagram.................................................................... 7-8

FILTERS ........................................................................................6

START-UP, ADJUSTMENT, AND SAFETY CHECK......6-9-10

Operational Checkout ...............................................................6

Combustion Check ................................................................6-9

Fan Adjustment Check .............................................................9

Limit Control Check...............................................................10

For Year-Round Air Conditioning.........................................10

Heating....................................................................................10

Cooling....................................................................................10

Constant Blower Switch.........................................................10

MAINTENANCE.........................................................................10

General....................................................................................10

Oil Burner ...............................................................................10

Heat Exchanger and Flue Pipe..........................................10-11

Blower Removal .....................................................................11

367AAN

Series A

Cancels: II 367A-105-1 II 367A-105-2

1-98

A96280

Fig. 1—367AAN Low-Boy Oil Furnace

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.

WARNING: For use with grade 1 or 2 Fuel Oil. 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.

—1—

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

20"20"20"

B

VENT 
CONN

21 1⁄4″

10"

3"

D

C

A

E

→DIMENSIONS (IN.)

UNIT

SIZE

036105 21-1/4 53-3/4 31-1/2 26-1/2 20 20 5
060120 21-1/4 60-5/32 34-3/4 28-11/32 22 24 6

Width Depth Height

UNIT DIMENSIONS

AB C D E

FLUE

HEIGHT

RETURN

OPENING

SUPPLY

OPENING

VENT

CONN

Fig. 2—Dimensional Drawing

A98009

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
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 these 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.

INTRODUCTION

→

The model 367AAN Furnaces are available in 2 sizes. Each size
unit can be fired at 3 different rates by a simple nozzle change.
Unit 036105 covers input ranges from 91,000 to 105,000 Btuh,
unit 060120 covers input ranges from 119,000 to 154,000 Btuh.

This furnace is a Low-Boy unit. It may be operated only in the
upflow configuration.

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.

.

—2—

→TABLE 1—MINIMUM CLEARANCES TO

COMBUSTIBLE MATERIALS (IN.)

UNIT APPLICATION LOW-BOY

Furnace 1

Sides

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

Back Service Clearance 19

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 9

Front 8

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

dimensions as required.

1

2

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 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.

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 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.

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.

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
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.

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.

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.

—3—

2. Sooting.

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

4. Air band or air shutter settings more open than normal.

5. Lockouts on start-up.

The requirements for combustion and ventilation air depend upon
whether the furnace is located in a CONFINED or UNCONFINED
space.

II. UNCONFINED SPACE

An unconfined space must have at least 50 cu ft for each 1000
Btuh of total input for all the appliances (such as furnaces, clothes
dryers, water heaters, etc.) in the space.

For Example:

→MINIMUM FLOOR AREA FOR UNCONFINED SPACE

367AAN FURNACE

INPUT BTUH

70,000 467

91,000 607
105,000 700
119,000 793
140,000 933
154,000 1026

MINIMUM SQ FT WITH

7-1/2 FT CEILING

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

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.

III. CONFINED SPACE

A confined space has a volume of less than 50 cu ft per 1000 Btuh
of the total input rating for all appliances installed in that space.

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.

For Example:

→

367AAN FURNACE

INPUT BTUH

70,000-105,000 16 8

119,000-154,000 20 10

LENGTH

(IN.)

HEIGHT

(IN.)

NOTE: 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.

The size of the openings depends upon whether the air comes from
outside of the structure or an unconfined space inside the structure.

A. All Air from Inside the Structure

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.

For Example:

→COMBUSTION AIR FROM UNCONFINED SPACE

367AAN FURNACE

INPUT BTUH

70,000 100

91,000 100
105,000 105
119,000 119
140,000 140
154,000 154

FREE AREA PER

OPENING

(SQ IN.)

B. All Air from Outside of Structure

If outside air is supplied to a confined space, then the 2 openings
must be equal and located as above.

1. If combustion air is taken through a permanent opening
directly communicating with the outdoors, the opening shall
have a minimum free area of 1 sq in. per 4000 Btuh of total
input rating for all equipment in the enclosure.

2. If combustion air is taken from outdoors through vertical
ducts, the openings and ducts MUST have at least 1 sq in.
of free area per 4000 Btuh of the total input for all
equipment within the confined space.

For Example:

→COMBUSTION AIR FROM OUTDOORS THROUGH

VERTICAL DUCTS

367AAN FURNACE

INPUT BTUH

70,000 17.5 5

91,000 22.8 6
105,000 26.3 6
119,000 29.8 6
140,000 35.0 6
154,000 38.5 6

FREE AREA PER

OPENING

(SQ IN.)

ROUND PIPE

(IN. DIAM)

3. If combustion air is taken from outdoors through horizontal
ducts, the openings and ducts MUST have at least 1 sq in.
of free area per 2000 Btuh of the total input for all
equipment within the confined space.

—4—

For Example:

→COMBUSTION AIR FROM OUTDOORS THROUGH

HORIZONTAL DUCTS

367AAN FURNACE

INPUT BTUH

70,000 35.0 7

91,000 45.5 8
105,000 52.5 9
119,000 59.5 9
140,000 70.0 10
154,000 77.0 10

FREE AREA PER OPENING

(SQ IN.)

ROUND PIPE

(IN. DIAM)

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.

DUCT WORK RECOMMENDATIONS

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.

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

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 front opening
provided at discharge end of furnace. The return-air duct work
should be attached to flanged rear opening of furnace. See Fig. 2
for dimensions of these openings.

NOTE: The back (blower access opening) should not be used for
return air.

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.

VENTING

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. 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 CHIMNEYS

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.

3. Never reduce pipe size below the outlet size of furnace.
(See Fig. 2.)

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.

OIL BURNER

This furnace is supplied with a high-pressure atomizing retention
head-type burner (for use with grade 1 or 2 fuel oil). The mounting
flange is fixed to burner air tube and no adjustment is required for
insertion length.

—5—

→TABLE 2—ELECTRICAL DATA

UNIT
SIZE

036105 115—60—1 132 104 12.2 14 26 15
060120 115—60—1 132 104 15.7 14 26 20

* Permissible limits of voltage range at which unit will operate satisfactorily.
† Length shown is as measured 1 way along wire path between unit and service panel for maximum 2 percent voltage drop.
‡ Time-delay fuse is recommended.

VOLTS—
HERTZ—

PHASE

OIL CONNECTIONS

OPERATING

VOLTAGE RANGE

Max* Min*

MAX
UNIT

AMPS

MIN

WIRE

GAGE

MAX WIRE

LENGTH (FT)†

FILTERS

Complete instructions for installing fuel oil piping can be found in
oil burner Installation Instructions included with furnace.

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.

WARNING: Never operate unit without a filter or with
filter access door removed. Failure to adhere to this
warning could lead to a hazardous condition which could
lead to equipment damage and bodily harm.

An oil filter should be used with all oil burners and should be
installed as close to burner as possible.

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.

ELECTRICAL CONNECTIONS

WARNING: The unit cabinet must have an uninter-

rupted or unbroken electrical ground to minimize per­sonal injury if an electrical fault should occur. A green

An internal filter rack is provided as standard equipment with
furnace and is located in blower compartment. A sufficient
clearance should be provided for air filter access. Refer to Table 3
for filter rack flange dimensions for return air duct.

→TABLE 3—FILTER SIZE (IN.) AND QUANTITY

UNIT

AIR FILTER

SIZE

036105 (2)12X20 20X20 20X20
060120 (2)16X20 22X20 24X20

SIZE

RETURN OPENING

SIZE

ground screw is provided in control box for this connec­tion.

START-UP, ADJUSTMENT, AND SAFETY CHECKOUT

I. OPERATIONAL CHECKOUT

MAX FUSE OR

CKT BKR AMPS‡

SUPPLY OPENING

SIZE

I. 115-V WIRING

Before proceeding with electrical connections, make certain that
voltage, frequency, and phase correspond to that specified on unit
rating plate. Also, check to be sure that service provided by utility
is sufficient to handle load imposed by this equipment. Refer to
rating plate or Table 2 for equipment electrical specifications.

Make all electrical connections in accordance with National
Electrical Code (NEC) ANSI/NFPA 70-1996 and any local codes
or ordinances that might apply. For Canadian installations, all
electrical connections must be made in accordance with Canadian
Electrical Code CSA C22.1 or subauthorities having jurisdiction.

CAUTION: Do not connect aluminum wire between
disconnect switch and furnace. Use only copper wire.

The control system depends on correct polarity of power supply.

→

Connect HOT wire (H) and NEUTRAL wire (N) as shown in Fig.
3 or Fig. 4.

→

A separate line voltage supply MUST be used with a fused
disconnect switch or circuit breaker between main power panel
and unit. (See Fig. 3 or Fig. 4.)

Metallic conduit (where required/used) may terminate at side panel
of unit. It is not necessary to extend conduit inside unit from side
panel to control box.

→

When replacing any original furnace wiring, use only 105°C No.
14 AWG copper wire.

II. 24-V WIRING

→

Instructions for wiring thermostat (field supplied) are packed in
thermostat box. Make thermostat connections as shown in Fig. 3 or
Fig. 4 at 24-v terminal board on primary relay.

III. ACCESSORIES

When installing optional accessories to this appliance, follow
manufacturer’s Installation Instructions included with accessory.
Other than wiring for thermostat, wire with a minimum of type "T"
insulation (63°F rise) must be used for accessories.

WARNING: DO NOT TAMPER WITH UNIT OR
CONTROLS—CALL YOUR SERVICE TECHNICIAN.

Installation of furnace is now complete. Run through the following
checkout and ensure each item has been performed.

1. Correct nozzle size has been selected for desired input rate.

2. Blower wheel support is removed.

3. Electrical wiring is completed according to Fig. 3 or Fig. 4.

4. Blower access door is secured in place.

5. Valve on oil supply line is open.

6. RESET BUTTON on primary control is pushed down.

7. Flame observation door and 2 cleanout access doors located
at front of unit are closed.

8. Thermostat is set for heating mode and set above room
temperature.

If all of the above items have been performed, set main electrical
switch to ON position and burner should start. When burner starts,
proceed to Combustion Check section.

II. COMBUSTION CHECK

In order to obtain optimum performance from oil burner, the
following setup procedures must be followed:

1. A test kit to measure smoke, stack draft, over-fire draft,

, and stack temperatures MUST be used in order to

CO

2

obtain proper air band setting. Although all of the above
measurements are required for optimum setup and effi­ciency data, the most important readings that must be taken
are smoke number, over-fire draft, and stack draft.

2. The proper smoke number has been established by engi­neering tests to be between 0 and 1. This degree of smoke
emission is commonly referred to as a "trace" of smoke. It
is recommended to use a Bacharach true spot smoke test set
or equivalent.

—6—

N3

L2(N)

N6

HI

ELECTRONIC

AIR CLEANER

COOL (BLUE)

K2

EAC

GND

115 VAC 10 60Hz POWER SUPPLY

(FUSED DISCONNECT ON HOT LEG)

L1(H)

S2

JUMPER

*

CMH

HEAT

K1

LO

ML

K2

BLOWER

CIRCULATION

(BLACK)

(RED)

UNUSED MOT. LEAD

L1 L2

CONT

CN6-1 CN6-2 CN6-4

K1

CN6-9

OIL PRIM

CONTROL

CN6-7

LIMIT

(2)

CN6-4

BURNER

MOTOR &

TRANSFO.

CN6-8

HUMIDIFIER

HUM N7

1

THERMOSTAT

2

3

A98060

Y

R

W

LIMIT SENSE

24VAC

120VAC

TRANSFO.

S3 N4

CX

C

G

BLOWER

K1 K2

CIRCULATION

K3

PRIM

CONTROL

ST9103A ELECTR. FAN TIMER

CN6-6

CN6-3

T1

T2

PRIMARY

CMH

HI

HEAT

COOL (BLUE)

BLOWER

CIRCULATION

LO

ML

(RED)

CONT

UNUSED MOT. LEAD

(BLACK)

CML

HI

MH

HEAT

COOL (BLUE)

BLOWER

CIRCULATION

LO

(RED)

CONT

UNUSED MOT. LEAD

(BLACK)

2

CAPACITOR

LO

ML

1

GND

FAN
CIRCULATING

CAPACITOR

WHITE

BLACK

WHITE

HI

MH

120 VAC POWER SUPPLY

L1 (H)

L2 (N)

120 VAC 24 VAC

FUSE

BLACK

BLACK

FAN
CIRCULATING

H

U

M

ST9103

R99G001

45

1233

UNUSED

C

CONSTANT LOW SPEED SWITCH

TRANSFO.

VIOLET

MOTOR/

BURNER

TRANSFORMER

WHITE

BLACK

WHITE

7

6

N

T

E

A

H

L

C

O

O

T

CON

E

A

C

2

S

LEADS

BLACK

X

ST9103

R99G001

H

U

45

1233

UNUSED

HUM

BLACK

M

N

S

LEADS

IS 115V

TERMINAL

RED

BLUE

LIMIT

CONTROL

WHITE

RED

C

7

6

T

E

A

H

L

C

O

O

T

CON

E

A

C

2

3

⁄2 TO

1

CAPACITOR

FAN
CIRCULATING

ML

HI

MH

F

F

O

ON

12

GWRYC

OIL PRIMARY

CONTROL

LO

OIL INPUT : 0.65 USGPH

COOLING CAPACITY : 2

3 TONS MAX.

T

L1TL2

YELLOW

BLUE

RED

BLACK

WHITE

ORANGE

*JUMPER

HUM TERMINAL IS 115V

H

ST9103

R99G001

45

WHITE

1233

BLACK

UNUSED

WHITE

C

CONSTANT LOW SPEED SWITCH

CAD CELL

U

M

N

S

LEADS

7

6

H

C

CON

E

2

E

O

A

A

O

C

T

L

T

HUM

IS 115V

TERMINAL

RED

BLUE

BLACK

OIL INPUT : 0.50 USGPH

COOLING CAPACITY : 2 TONS

Fig. 3—Wiring Diagram For 036105

LO

ML

MH

C

HI

RED

CONSTANT LOW SPEED SWITCH

BLACK

BLUE

G

THERMOSTAT

JUMPER: USE JUMPER ONLY WHEN THE COOLING

STANDARD HEAT / COOL WIRING DIAGRAM

WITH ST9103 ELECTRONIC FAN TIMER

OIL INPUT : 0.75 USGPH

COOLING CAPACITY; 3 TONS MAX.

AND HEATING SPEEDS ARE SAME

*

WY R

—7—

N3

L2(N)

N6

HI

MH

ELECTRONIC

AIR CLEANER

COOL

K2

EAC

GND

115 VAC 10 60Hz POWER SUPPLY

(FUSED DISCONNECT ON HOT LEG)

L1(H)

S2

BLOWER

CIRCULATION

C

LO

ML

HEAT

K2

UNUSED MOT. LEAD

K1

CONT

K1

L1 L2

CN6-1 CN6-2 CN6-4

CN6-9

OIL PRIM

CONTROL

CN6-7

LIMIT(S)

CN6-4

BURNER

MOTOR &

TRANSFO.

CN6-8

HUMIDIFIER

HUM N7

1

THERMOSTAT

2

3

A98061

Y

R

W

LIMIT SENSE

TRANS

24VAC

120VAC

S3 N4

CX

C

G

BLOWER

K1 K2

CIRCULATION

K3

PRIM

CONTROL

ST9103A ELECTR. FAN TIMER

CN6-6

CN6-3

T1

T2

PRIMARY

HI

COOL

BLOWER

CIRCULATION

CMH

LO

ML

HEAT

UNUSED MOT. LEAD

CONT

HI

COOL

C

MH

HEAT

BLOWER

CIRCULATION

LO

ML

CONT

UNUSED MOT. LEAD

* JUMPER

2

CAPACITOR

LO

1

GND

CAPACITOR

FAN
CIRCULATING

FUSE

WHITE

BLACK

WHITE

C

HI

ML

MH

120 VAC POWER SUPPLY

L2 (N)

BLACK

TRANS

120 VAC 24 VAC

BLACK

L1 (H)

FAN
CIRCULATING

H

U

M

7

6

N

ST9103

R99G001

45

E

H

C

O

CON

1233

E

2

S

LEADS

UNUSED

CONSTANT LOW SPEED SWITCH

VIOLET

MOTOR/

BURNER

WHITE

BLACK

WHITE

ST9103

TRANSFORMER

R99G001

45

1233

UNUSED

A

O

A

C

BLACK

H

T

L

T

X

U

M

HUM

TERMINAL

BLUE

BLACK

LIMIT

CONTROL

WHITE

C

7

6

N

E

H

C

O

CON

E

A

2

S

LEADS

3

IS 115V

CAPACITOR

FAN
CIRCULATING

BLACK

T

L1TL2

WHITE

LO

F

ORANGE

RED

OIL INPUT : 1.00 USGPH

COOLING CAPACITY : 4 TO 5

TONS MAX.

YELLOW

BLUE

RED

RED

T

A

L

O

T

C

HUM TERMINAL IS 115V

WHITE

BLACK

WHITE

HI

ML

MH

F

O

OIL PRIMARY

CONTROL

ON

12

GWRYC

H

U

M

N

ST9103

R99G001

45

1233

S

LEADS

UNUSED

C

RED

CONSTANT LOW SPEED SWITCH

CAD CELL

7

6

E

H

C

O

CON

E

2

A

A

O

C

T

L

T

HUM

IS 115V

TERMINAL

BLUE

BLACK

* JUMPER

OIL INPUT : 1.10 USGPH

COOLING CAPACITY : 5 TONS

Fig. 4—Wiring Diagram for 060120

LO

ML

MH

C

HI

CONSTANT LOW SPEED SWITCH

BLACK

BLUE

RED

G

THERMOSTAT

JUMPER: USE JUMPER ONLY WHEN THE COOLING

STANDARD HEAT / COOL WIRING DIAGRAM

WITH ST9103 ELECTRONIC FAN TIMER

OIL INPUT : 0.85 USGPH

COOLING CAPACITY; 4 TONS MAX.

AND HEATING SPEEDS ARE SAME

*

WY R

—8—

3. In order to ensure proper draft through furnace, a baromet­ric draft regulator (supplied with furnace) must be installed
as close to outlet of furnace as possible.

In order for this device to function properly, barometric
damper must be mounted with hinge pins horizontal and
face of damper vertical. (See instructions included with
damper.) The draft regulator should be adjusted after
furnace has been firing for at least 5 minutes, and set
between -0.025 and -0.035 in. wc. (See Table 4.)

4. The over-fire draft, which is taken through observation door
(located in center line above burner in front panel of
furnace), is a measurement necessary to determine if there
is a blockage between oil burner and flue outlet.

There should be a total pressure drop of between 0.020 and

0.05 in. wc through furnace as shown in Table 4. The
over-fire draft must be set within the range shown in Table

4.

→TABLE 4—FURNACE DRAFT CONDITIONS

(IN. WC)

FURNACE

INPUT

(BTUH)

70,000 -0.025 0.010 0.020 to 0.035

91,000 -0.025 0.020 0.030 to 0.045
105,000 -0.025 0.025 0.035 to 0.050
119,000 -0.025 0.025 0.035 to 0.050
140,000 -0.025 0.025 0.035 to 0.050
154,000 -0.025 0.025 0.035 to 0.050

FLUE

DRAFT

MINIMUM

OVER-FIRE

DRAFT

MAXIMUM

TOTAL RESTRICTION

THROUGH

HEAT EXCHANGER

A reading outside the range shown in Table 4 (for example
+0.1 in. wc) would indicate that furnace is in an extremely
high-pressure condition in primary section. This condition
may be caused by any of the following problems:

a. Excessive combustion air due to air band being too wide

open.

b. A lack of flue draft (chimney effect) or some other

blockage, such as soot, in secondary section of heat

exchanger.
c. Use of an oversized nozzle input.
d. Pump pressure over 105 psig.

5. The CO

and stack temperature instruments enable you to

2

obtain data required to determine thermal efficiency of
furnace.

6. An oil filter should be installed as close to burner as
possible with ALL oil burners and is essential on lower
firing rate burners. We recommend the use of a low
pressure drop oil filter such as the General Filter, Inc. model
#1A-25A or equivalent.

7. The oil pressure regulator is factory set to give nozzle oil
pressures of 100 psig. The firing rates noted on nameplate
may be obtained using nozzles listed in Table 5.

8. On a new installation, air entrapped in oil line leading from
tank to nozzle must be thoroughly purged in order to
prevent excessive after drip. The oil pump is provided with
a special fitting which allows purging of any air between
tank and oil pump. The proper procedure for performing
this operation is as follows:

a. Place a piece of clear plastic 1/4 in. diameter tubing over

purge fitting on oil pump.

b. Start oil burner, then open purge fitting and allow burner

to run until purge tube is completely free of air bubbles.

c. Tighten purge fitting. Allow oil to run to nozzle and fire

burner.

→TABLE 5—BURNER INPUT AND NOZZLE SIZE

(AT 100 PSIG PUMP PRESSURE)

FURNACE

INPUT

(BTUH)

70,000 0.50 AFG-F3

91,000 0.65 AFG-F3

105,000 0.75 AFG-F3

119,000 0.85 AFG-F3

140,000 1.00 AFG-F3

154,000 1.10 AFG-F6*

* Requires field supplied and replacement burner firing head.

FIRING

RATE

GAL/HR (US)

BECKETT OIL BURNER

Model Nozzle

0.50 gph
70-W

0.65 gph
70-W

0.75 gph

70-B

0.85 gph

70-B

1.00 gph
70-W

1.10 gph
70-W

d. If purging takes longer than 15 sec and no flame has

been established, burner stops. Push reset button on top
of primary control to restart burner.

e. For detailed information on operation of primary control,

refer to instructions included with furnace.

After all the setup procedures mentioned above have been com­pleted, the burner should be allowed to operate and an inspection
mirror should be used to observe the flame pattern at tip of nozzle.
Any irregularities such as burning to 1 side or pulsating flame
patterns should be corrected by changing nozzle.

III. FAN ADJUSTMENT CHECK

This furnace is equipped with a 4-speed direct-drive motor to
deliver a temperature rise within range specified on rating plate,
between return and supply plenums, at external duct static pressure
noted on rating plate.

WARNING: When operating furnace in heating mode,
static pressure and temperature rise (supply-air tempera­ture minus return-air temperature) must be within those
limits specified on rating label. Failure to follow this
warning could lead to severe furnace damage.

Adjust fan speed ACCORDING TO OIL INPUT SELECTED so
that temperature rise is within rise range specified on rating plate.
(See Table 6.) Consult wiring diagram for speed changes on
direct-drive motor.

→TABLE 6—SPEED SELECTION

UNIT

SIZE

036105/

060120

→

To adjust fan off time, set DIP switches on control board to obtain

FURNACE

INPUT

(BTUH)

70,000/119,000 Med-Low
91,000/140,000 Med-High

105,000/154,000 High

RECOMMENDED

BLOWER

SPEED

desired timing. (See Fig. 5.)

12

60 Sec

DELAY OFF DIP SWITCH SETTINGS

12

12 1212

90 Sec

120 Sec

12

150 Sec

→Fig. 5—Fan Off Time DIP Switch Settings

(Black Box Represents Switch Position)

A95115

—9—

IV. LIMIT CONTROL CHECK

After furnace has been in operation for at least 15 minutes, restrict
return-air supply by blocking filters or closing return registers and
allow furnace to shut down on high limit. The burner should shut
off, and main blower should continue to run.

Remove restriction, and burner should come back on in a few
minutes.

V. FOR YEAR-ROUND AIR CONDITIONING

This furnace is designed for use in conjunction with cooling
equipment to provide year-round air conditioning. The blower has
been sized for both heating and cooling, however, fan motor speed
may need to be changed to obtain necessary cooling airflow.

VI. HEATING

The blower speed is factory set to deliver required airflow at
normal duct static pressure.

VII. COOLING

The blower speed may be field adjusted to deliver required airflow
for cooling application. (See Table 7.)

VIII. CONSTANT BLOWER SWITCH

This furnace is equipped with a constant low-speed blower option.
Whenever room thermostat is not calling for heating or cooling,
blower runs on low speed in order to provide air circulation. If
constant blower option is not desired, the rocker switch on top of
cabinet may be used to turn off constant speed.

MAINTENANCE

WARNING: The ability to properly perform mainte-

nance on this equipment requires certain expertise, me­chanical skills, tools, and equipment. If you do not
possess these, do not attempt to perform any maintenance
on this equipment other than those procedures recom­mended in the User’s Manual. FAILURE TO FOLLOW
THIS WARNING COULD RESULT IN POSSIBLE
DAMAGE TO THIS EQUIPMENT, SERIOUS PER­SONAL INJURY, OR DEATH.

WARNING: Before performing any service functions,
unless operations specifically require power to be on,
make sure all utilities are turned off upstream of appli­ance. Failure to comply with this warning will cause a fire
hazard and/or bodily harm.

WARNING: To avoid personal injury, make sure elec­trical supply power is off before servicing. Failure to
follow this warning could lead to electrical shock, fire, or
death.

I. GENERAL

In order to keep this furnace in good operating condition and to
maintain its warranty, the furnace MUST be serviced on an annual
basis. This servicing includes a nozzle change, a burner inspection,
a visual check of tube passages through flue outlet and cleanout
ports, and a visual inspection of combustion chamber when burner
is removed.

Depending on above inspection, service could also include a
cleaning and vacuuming of heat exchanger tubes and possibly the
heat exchanger drum section.

Removal of any heat exchanger components which are sealed by
gaskets requires replacement of gasket.

WARNING: Failure to replace any heat exchanger gas­kets with new gaskets when any heat exchanger plates or
covers are removed could lead to heat exchanger leakage,
sooting, and/or a hazardous condition capable of causing
bodily harm.

This furnace should never be operated without an air filter.
Disposable filters should be replaced at least once a year. If
equipped to provide cooling, filters should be replaced a minimum
of twice a year. Permanent filters should be cleaned at least twice
a year.

ALWAYS KEEP MAIN OIL VALVE TURNED OFF IF
BURNER IS SHUT DOWN FOR AN EXTENDED PERIOD OF
TIME.

II. OIL BURNER

For optimum performance, oil burner nozzle should be replaced
once a year. Contact your service technician if you are unsure of
this procedure.

The procedure for nozzle installation and/or replacement is out­lined in oil burner instruction manual which came with furnace.

After replacement of nozzle, burner should be adjusted in accor­dance with Combustion Check section of this instruction.

III. HEAT EXCHANGER AND FLUE PIPE

Ordinarily, it is not necessary to clean heat exchanger or flue pipe
every year, but it is necessary to have your service technician
check unit before each heating season to determine whether
cleaning or replacement of parts is required.

If cleaning is necessary, the following steps should be performed:

→TABLE 7—AIRFLOW DATA (CFM)

UNIT
SIZE

036105

060120

NOTES: 1. Airflow values in cubic ft per minute (CFM) rounded to nearest 5 CFM.

2. Data taken with filters in place.

BLOWER

SPEED

High 1425 1350 1305 1250 1170 1030 925 805

Med-High 1130 1045 1000 950 885 820 745 670

Med-Low 840 810 770 740 685 635 580 500

Low 725 730 740 745 730 715 690 665

High 2080 2041 1965 1864 1702 1576 1474 1336

Med-High 1892 1859 1770 1675 1550 1449 1330 1217

Med-Low 1556 1475 1394 1318 1211 1134 1051 938

Low 1221 1164 1081 998 926 855 782 653

0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

EXTERNAL STATIC PRESSURE IN. WC

—10—

1. Turn off all oil and electrical supplies upstream of furnace.

9. Readjust burner for proper operation.

CAUTION: If furnace has been in operation, some
surfaces may be hot. Allow time for unit to cool down.

2. Disconnect flue pipe.

3. Remove flue collar panel located in rear part of furnace.

4. Remove flue silencer from secondary heat exchanger.

5. Disconnect oil line and remove oil burner from furnace.

6. Clean primary and secondary heat exchangers with a stiff
brush and vacuum cleaner.

7. Before reassembly, heat exchanger/combustion chamber
should be inspected to determine if replacement is required.

8. After cleaning, replace flue silencer, flue collar, and oil
burner.

IV. BLOWER REMOVAL

To remove blower from furnace:

1. Turn off all oil and electrical supplies upstream of furnace.

2. Remove blower access door.

3. Remove air filters.

4. Remove blower retaining wing nuts.

5. Slide blower on rails toward rear of unit.

6. Reverse items 1 through 5 to reinstall blower. Refer to

→

wiring diagram (Fig. 3 or Fig. 4) of these instructions or
diagram located on inside of blower door to properly rewire
unit.

—11—

SERVICE TRAINING

Packaged Service Training programs are an excellent way to increase your
knowledge of the equipment discussed in this manual, including:
 • Unit Familiarization • Maintenance
 • Installation Overview • Operating Sequence
A large selection of product, theory, and skills programs is available, using popular
video-based formats and materials. All include video and/or slides, plus companion
book.

Classroom Service Training plus "hands-on" the products in our labs can mean
increased confidence that really pays dividends in faster troubleshooting, fewer
callbacks. Course descriptions and schedules are in our catalog.


CALL FOR FREE CATALOG 1-800-962-9212



[ ] Packaged Service Training [ ] Classroom Service Training

A94328

© 1998 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231

—12—

Printed in U.S.A. 367a1052 Catalog No. 5336-700