GAMA PO8LAA User manual

NOTE: Read the entire instruction manual before starting the installation.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS.....................................................................................................................................................................................2
INTRODUCTION..........................................................................................................................................................................................................2
LOCATION ...................................................................................................................................................................................................................3
AIR FOR COMBUSTION AND VENTILATION ................................................................................................................................................3
DUCT WORK RECOMMENDATIONS................................................................................................................................................................4
INSTALLATION...........................................................................................................................................................................................................4
VENTING INSTRUCTIONS ..................................................................................................................................................................................4
PRE-INSTALLATION VENT SYSTEM INSPECTION.......................................................................................................................................5
MASONRY CHIMNEY ..........................................................................................................................................................................................5
HORIZONTAL VENTING......................................................................................................................................................................................5
OIL BURNER..........................................................................................................................................................................................................6
OIL CONNECTIONS..............................................................................................................................................................................................6
BAROMETRIC DRAFT CONTROL......................................................................................................................................................................6
ELECTRICAL..........................................................................................................................................................................................................6
FILTERS...................................................................................................................................................................................................................6
OPERATIONAL CHECKOUT.....................................................................................................................................................................................6
START-UP ...............................................................................................................................................................................................................6
RECOMMENDED INSTALLATION PRACTICES AND COMBUSTION CHECK.........................................................................................7
FAN ADJUSTMENT CHECK................................................................................................................................................................................7
LIMIT CONTROL CHECK....................................................................................................................................................................................7
FOR YEAR-ROUND AIR CONDITIONING........................................................................................................................................................7
HEATING.................................................................................................................................................................................................................7
COOLING ................................................................................................................................................................................................................8
CONSTANT BLOWER SWITCH..........................................................................................................................................................................8
CARE AND MAINTENANCE ....................................................................................................................................................................................8
GENERAL................................................................................................................................................................................................................8
OIL BURNER..........................................................................................................................................................................................................8
HEAT EXCHANGER AND FLUE PIPE...............................................................................................................................................................9
BLOWER OILING AND REMOVAL .................................................................................................................................................................11
KEEPING FILTERS CLEAN................................................................................................................................................................................11
ama
Installation Manual
PO8LAA
Low-Boy Oil Furnace
Form: IM-P08L-03 Cancels: NEW Printed in U.S.A. 7–00 Catalog No. 63PO-8LI

SAFETY CONSIDERATIONS
WARNING: 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 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 sever bodily harm.
CAUTION: Never burn garbage or paper in the heating system. 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
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, or 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 that could result in personal injury or death.
CAUTION is used to identify unsafe practices which would result in personal injury or product or property damage.
INTRODUCTION
The model PO8LAA furnaces are available in sizes 105,000 Btuh 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.
Table 1–Minimum Clearances to Combustible Materials (in.)
UNIT APPLICATION LOW-BOY
Sides Furnace 0
Supply Plenum and Warm-Air duct within 6ft. of Furnace 1
Back 0
Top Furnace Casing or Plenum 2
Horizontal Warm-Air Duct within 6ft. of Furnace 2
Bottom 0*
Flue Pipe Horizontally or Below Pipe 4
Vertically Above Pipe 8
Front 8
*Floor my be combustible
Adequate service clearance should be provided over and above these dimensions as required.
—2—

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 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 the 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.
PROCEDURE 1—AIR FOR COMBUSTION AND VENTILATION
WARNING: Installation of this furnace in an areas 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.
This furnace should be installed in a location in which facilities for ventilation permit satisfactory combustion for 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 requirements.
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.
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 gasses. 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 takes away from air volume.
Many new buildings and homes (and older ones that have been weatherized) MUST be considered as being tight of 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. Weather-stripping 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.
Furnace sizes listed in Table 2 may be installed in a closet or enclosure. Installer must provide 2 ventilation openings, with OPEN AREA as
dimensioned in Table 2, for combustion air. The openings should be located about 6 in. from top and bottom of enclosure at front of furnace.
For example:
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.
—3—

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 1/4in. mesh and shall be readily accessible for cleaning. If free area through a design of louver or grille is know, it shall be used
in calculating size design and free area specified. If design and free areas 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.
The lack of 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.
2. Sooting.
3. Melted oil burner couplings and/or ignitor/relay control.
4. A condition where air band or air shutter settings must be open more than normal to achieve proper combustion.
5. Lockouts on start-up.
PROCEDURE 2—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 ad Air Conditioning Systems) or
Canadian equivilent.
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 neccessary, 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 fire harzard 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 adaquate 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.
INSTALLATION
PROCEDURE 1—VENTING INSTRUCTIONS
Venting of furnace should be to the outside and in accordance with local codes or requirements of local utility.
—4—

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).
PROCEDURE 2—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. Clearing 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).
PROCEDURE 3—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.
3. Never reduce pipe size below minimum certified furnace pipe size shown in Table 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 the 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 the highest connected equipment flue collar.
10. Check local codes for any variance.
PROCEDURE 4—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
(312) 426–2993
or
Fields Controls Model SWGII-5 (with a CK-60 or CK-61 timer) available from:
Fields Controls Company
2308 Airport Road
Kinston, NC. 28051
(919) 522–3031
NOTE: In both cases, the 24–v wiring schematic included with the 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!
Table 2–Minimum Certified Furnace Pipe Size
UNIT SIZE MINIMUM PIPE DIAMETER (IN.)
036105 5
048125 5
060155 6
—5—

PROCEDURE 5—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.
PROCEDURE 6—OIL CONNECTIONS
Complete instructions for installation of fuel oil piping will 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.
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.
PROCEDURE 7—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.
PROCEDURE 8—ELECTRICAL
The appliance must be installed in accordance with current ANSI/NFPA 70 (National Electric Code), CSA C22.1 (Canadian Electrical Code Part
1), and/or local codes.
The control system depends on correct polarity of power supply. Connect HOT wire (H) and NEUTRAL wire (N) as shown in Fig. 7.
A separate line voltage supply MUST be used with a fused disconnect switch or HACR-type circuit breaker between main power panel and unit.
(See Fig. 7.) Disconnecting means must be within sight of furnace.
WARNING: The unit cabinet must have an uninterrupted or unbroken electrical ground to minimize personal injury if
an electrical fault should occur. A green ground screw is provided in control box for this connection.
Use only copper wire for 115–v supply service to unit.
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. 16 AWG copper wire.
Instructions for wiring thermostat (field supplied) are packed in thermostat box. Make thermostat connections as shown in Fig. 7 at 24–v terminal
board on control box.
When installing optional accessories to this appliance, follow manufacturers installation instructions included with the accessory. Other than wiring
for thermostat, wire with a minimum of type “T” insulation (63°F rise) must be used for accessories.
Two 1/4 in. quick-connect terminals marked EAC and N5 are provided for electronic air cleaner (EAC) connection. (See Fig. 7.) These terminals
are energized with 115v (0.5 amp maximum) during blower motor operation.
Two 1/4 in. quick-connect terminal marked HUM and N6 are provided for 115–v humidifier connection. (See Fig. 7.) These terminals are
energized with 115v (0.5 amp maximum) during any call for heat.
PROCEDURE 9—FILTERS
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 internal filter is provided as standard equipment with furnace. Refer to Maintanance Section, Step 5–Keeping Filters Clean for filter cleaning
information.
OPERATIONAL CHECKOUT
DO NOT START BURNER UNLESS BLOWER ACCESS PANEL IS SECURED IN PLACE.
Install of furnace is now complete and operational checkout may be performed.
PROCEDURE 1—START-UP
1. Check wiring against wiring diagram shown in Fig. 7.
2. Open valve on oil supply line.
3. Reset primary control.
4. Set thermostat above room temperature.
5. Set main electrical switch to ON position. Burner should start.
DO NOT TAMPER WITH UNIT OR CONTROLS — CALL YOUR SERVICE TECHNICIAN.
Table 3–Oil Burner Air Tube Length
UNIT SIZE LENGTH (IN.)
036105 5
048125 5
060155 7
—6—

PROCEDURE 2—RECOMMENDED INSTALLATION PRACTICES AND COMBUSTION CHECK
In order to obtain optimum performance from oil burner, the following setup procedures must be followed:
1. A test kit (Bacharach No. 5022 kit or equivalent) to measure smoke, stack draft, over-fire CO
2
, and stack temperatures MUST be used in
order to 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.
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
10 minutes, and stack draft should be measured and set between —0.025 and —0.035 in. wc. The draft should be checked with a Bacharach
MZF draft gauge or equivalent.
4. The over-fire draft, which is taken through hole provided in observation door, is a measurement necessary to determine if there is blockage
between oil burner and flue outlet.
There should be a pressure drop of between 0.005 and 0.015 in. wc through furnace. This would set the range of the over-fire draft between —0.01
and —0.03 in. wc. A reading above —0.01in. wc. (for example, +0.1in. wc) would indicate that furnace is in an extremely high-pressure condition
in primary section. This condition may be caused by excessive combustion air due to air band being open too wide, or a lack of flue draft (chimney
effect), or some other blockage, such as soot, in secondary section of heat exchanger.
5. The CO
2
and stack temperature instruments enable you to 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 lowing firing rate burners. The use
of a low pressure drop oil filter such as General Filter, Inc. model # 1A-25A or equivalent is recommended. It is critical that oil capacity
be equivalent or greater that fuel pump gear capacity. For a 2–pipe system, this is 25 gph.
7. The oil pressure regulator is factory set to give nozzle oil pressures of 100 psig. The firing rate noted on nameplate may be obtained with
“standard” nozzles by adjusting pump pressure as noted in Table 4 or on label on furnace.
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.
d. If purging takes longer than 30 seconds 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.
PROCEDURE 3—FAN ADJUSTMENT CHECK
This furnace is equipped with a 3–speed direct drive motor to deliver a temperature rise (between return and supply plenums) within range specified
on rating plate at external duct static pressure noted on rating plate.
CAUTION: 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 caution could lead
to sever furnace damage.
Adjust fan speed so that temperature rise is within range specified on rating plate. Consult wiring diagram for speed changes on direct-drive motor.
To adjust fan off time, set DIP switches on control board to obtain desired timing (see Fig. 1).
PROCEDURE 4—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.
PROCEDURE 5—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.
PROCEDURE 6—HEATING
The blower speed is factory set to deliver required airflow at normal duct static pressure.
Table 4–Burner, Nozzle, and Pump Pressure Chart
UNIT SIZE FIRING RATE GAL/HR (US) PUMP PRESSURE (PSIG) BECKETT OIL BURNER
Model Nozzle
036105 0.76 103 AFG 0.75 gph/70° Hollow
048125 0.90 100 AFG 0.90 gph/70° Hollow
060155 1.12 104 AFG 1.10 gph/70° Hollow
—7—

PROCEDURE 7—COOLING
The blower speed may be field adjusted to deliver required airflow for cooling application (see Table 5).
PROCEDURE 8—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 side of control box may be used
to turn off constant speed.
CARE AND MAINTENANCE
WARNING: The ability to properly perform maintenance 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 the electrical supply power is off before servicing.
PROCEDURE 1—GENERAL
In order to keep furnace in good operating condition and to maintain it’s warranty, furnace MUST be serviced on an annual basis. This servicing
includes a nozzle change, burner inspection, 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 cleaning and vacuuming of heat exchanger tubes and possibly 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 air filter(s). 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.
PROCEDURE 2—OIL BURNER
Contact your service technician for service.
Lubricate burner motor with SAE 10 oil. Once each year, pour 2 teaspoons of oil slowly into each oil cup.
To maintain proper performance, oil nozzle MUST be replace once a year.
Fig. 1–Fan Off Time DIP Switch Settings (Black Box Represents Switch Position)
A95115
12
60 Sec 12 90 Sec
DELAY OFF DIP SWITCH SETTINGS
12 1212
120 Sec 12 150 Sec
Table 5–Airflow Data (CFM)
UNIT SIZE BLOWER SPEED EXTERNAL STATIC PRESSURE IN. WC
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
036105 High 1795 1735 1675 1605 1550 1485 1425 1350 1275 1220 Medium 1365 1335 1305 1275 1255 1215 1155 1105 1050 985
Low 995 965 945 925 900 870 825 775 725 670
048125 High 1905 1845 1770 1695 1630 1565 1490 1425 1325 1220 Medium 1750 1675 1620 1560 1500 1440 1370 1305 1235 1130
Low 1390 1350 1305 1260 1220 1180 1120 1060 985 880
060155 High 2025 1960 1905 1850 1800 1665 1575 1500 1415 1315 Medium 1885 1825 1760 1705 1640 1565 1500 1430 1350 1265
Low 1555 1490 1445 1410 1350 1280 1230 1155 1085 1005
1. Airflow values in cubic ft. per minute (CFM) rounded to nearest 5 CFM.
2. Data taken without filters in place.
—8—

The procedure for nozzle installation and/or replacement is outlined in Oil Burner Instruction Manual which came with the furnace. For ease of
maintenance the oiling procedure for burner motor, as outline in burner manual, should be performed at the same time.
After replacement of nozzle, burner should be adjusted in accordance with Combustion Check section of the instruction.
PROCEDURE 3—HEAT EXCHANGER AND FLUE PIPE
Ordinarily, it is not necessary to clean heat exchanger or flue pipe every year; however, it is NECESSARY to have your service technician check
unit before each heating season to determine whether cleaning or replacement of parts is required.
A. Cleaning Secondary Heat Exchanger Tubes and Flue Pipe Only
1. Turn off all oil and electrical supplies upstream of furnace.
CAUTION: If furnace has been in operation, some surfaces may be hot. Allow time for unit to cool down.
2. Disconnect flue pipe and remove flue elbow.
3. For access to cleanout ports, remove blower door and filter. The 2 cleanout ports are located in the blower compartment. They protrude
through the partition and are located on the left and right of flue pipe.
4. Unscrew wing clamp nuts and remove cleanout port covers. This allows access to the tubes. (See Fig. 2.)
5. Clean secondary tubes and flue pipe with a stiff brush and vacuum cleaner.
6. Before reinstalling cleanout port covers, the gasket on each cover MUST be replaced. Use cleanout port gasket kit part no. 20196201.
7. Reinstall covers and tighten in place making sure that covers are properly seated over ports and gasketed has sealed opening. (See Fig. 3.)
WARNING: Failure to replace cleanout port cover gaskets, failure to properly seat covers over ports, and/or failure to
securely tighten wing nuts could lead to flue gas leakage. This could lead to furnace damage, oil fumes, sooting, and severe
bodily harm.
8. Reconnect flue pipe.
9. Reinstall filter and blower door.
10. Turn on power to unit and readjust burner for proper operation. Inspect cleanout ports and flue connection to make sure there are no leaks.
B. Cleaning Both Primary and Secondary Heat Exchangers
If a more thorough cleaning is required (both primary and secondary heat exchanger sections), the following steps should be performed:
1. Turn off all oil and electrical supplies upstream of furnace.
CAUTION: If furnace has been in operation, some surfaces may be hot. Allow time for unit to cool down.
2. Remove blower door.
3. Disconnect flue pipe.
4. Remove outside flue collar.
5. Remove top rear panel.
NOTE: Blower removal as described in Maintenance Section, Procedure 4–Blower Oiling and Removal may be desired for easier access when
cleaning with duct work attached.
6. Remove inside collar on flue pipe.
Fig. 2–Removing Cleanout Port Covers
A96310
CLEANOUT
PORTS
CLEANOUT
PORT COVER
& CLAMP
ASSEMBLY
BLOWER
DOOR
—9—

7. Remove top partition.
8. Place field-fabricated cardboard on metal tray beneath collector box to prevent debris form entering blower compartment..
9. Remove flue collector box from secondary heat exchanger tube flnge. This exposes inside surfaces of secondary tubes of heat exchanger..
10. Clean secondary tubes and flue pipe with a stiff brush and vacuum cleaner..
11. Remove louvered door.
12. Disconnect limit control wires.
13. Disconnect oil line and remove oil burner from furnace.
14. Remove observation door and collar on observation tube..
15. Remove intermediate panel. Care must be taken not to bend or damage limit control..
CAUTION: Never use incendiary type cleaners (smoke sticks) for cleaning!
WARNING: For all heat exchanger plates that have been removed, the gaskets MUST be replaced. Failure to replace
gaskets could lead to heat exchanger leakage, sooting, and a hazardous condition which could lead to bodily harm.
16. Loosen to hand tightness the 3 nuts labeled “A” in Fig. 4. Remove screws labeled “B” in Fig. 4. Slide combustion chamber forward out
of heat exchanger. Be careful not to bump combustion chamber as it becomes brittle after having been fired..
17. Use a stiff brush and vacuum cleaner to clean inside of primary drum..
18. Before reassembly, heat exchanger and combustion chamber should be inspected to determine if replacement is required. After cleaning,
place combustion chamber back into primary drum and secure with “B” screws. Ensure that cover plate gasket is in place before tightening
screws. Care must be taken not to damage combustion chamber. The “B” screws should be tightened to 35–45 lb.in..
19. Tighten “A” nuts to 30 lb.-in. of torque (firm, but not overly tight).
20. Replace intermediate panel, observation tube collar, observation door, limit wiring, and oil burner.
21. Replace collector box on secondary tube flange, ensuring proper placement of gasket. Tighten screws to 35–45 lb.in. of torque.
22. Replace top partition, inside collar on flue pipe, top rear panel, outside flue collar, and blower door.
23. Reconnect flue pipe and oil line(s).
Fig. 3–Reinstalling Cleanout Port Covers
A96311
FLUE BOX
PARTITION
PANEL
CLEANOUT
PORT COVER
WING
CLAMP
NUT
CLEANOUT
COVER
GASKET
CLEANOUT
COVER
CLAMP
BRACKET
INSULATION
Fig. 4–Removing Combustion Chamber
A96398
A
B
—10—

24. Readjust burner for proper operation. Check limit operation as outlined in Operational Checkout, Procedure 4–Limit Control Check section.
PROCEDURE 4—BLOWER OILING AND REMOVAL
Periodic oiling of blower motor may be necessary. Check for instructions on inside of blower access panel.
If it is ever necessary to remove blower from furnace:
1. Turn off electrical power to furnace.
2. Remove blower door.
3. Remove screws securing blower legs to blower rails mounted on bottom panel of furnace.
4. Slide blower forward on rails toward front of unit until motor wire connections at terminal block on motor can easily be reached and
disconnected.
5. Disconnect motor wires at terminal block on motor.
6. Remove blower from unit..
7. Reverse items 1 through 6 to reinstall blower. Refer to wiring diagram (Fig. 7) of this instruction or diagram located on inside of louvered
door to properly rewire unit.
PROCEDURE 5—KEEPING FILTERS CLEAN
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.
As a homeowner, keeping filters clean is your most important responsibility. A dirty filter reduces efficiency of your system, causes erratic
performance of controls, and could result in damage to motor or heating equipment.
1. Inspect filters at regular intervals depending on dirt conditions. For new homes, check filters every week for 4 consecutive weeks. In all
cases, inspect filters at least every 3 to 4 weeks when system is in constant operation. Replace or clean filter at least at beginning of each
season (heating or cooling) and thereafter as needed.
2. If the permanent filter supplied with filter rack becomes dirty, it can be cleaned with cold water and soap.
Be sure that filter is thoroughly dry before installing back into furnace.
—11—

Fig. 5–Dimensional Drawing
Dimensions (In.)
UNIT SIZE UNIT DIMENSIONS DUCT SUPPLY
OPENING FLUE DIAMETER RETURN DUCT
Width Depth Height
ABCD E F GH
036105 22 52 33 20 17-1/4 6 25-1/4 18
048125 22 57 33 20 22-1/4 6 30-1/4 18
060155 22 57 33 20 22-1/4 6 30-1/4 18
A96309
INSULATION
INTERMEDIATE
PANEL
FILTER
B
A
G
D
ELECTRICAL
CONNECTIONS
OIL INLET
F
12 1⁄16″EH
1″
INSULATION
PARTITION
PANEL
SUPPLY
DUCT
CLEAN-OUT PORTS
RETURN
DUCT
1″
3″
C
—12—

Fig. 6–Barometric Damper Locations
A95117
FIG. A
FIG. G
FIG. D
FIG. L
FIG. B FIG. C
FIG. J
FIG. H
FIG. K
POOR
WRONG
WRONG WRONG
WRONG
WRONG
BAROMETRIC DAMPER LOCATIONS
GOOD LOCATIONS
BAD LOCATIONS
—13—

INDOOR
BLOWER
MOTOR BR
BR
CAP
T
GND
LINE V
24 V
LINE V
24 V
BK
BL
BR
GR
OR
RD
RD/BK
VI
WH
YL
F
T
CAP
AL
L
GND
BLACK
BLUE
BROWN
GREEN
ORANGE
RED
RED/BLACK STRIPE
VIOLET
WHITE
YELLOW
LOW SPEED FAN SWITCH
TRANSFORMER
STARTING CAPACITOR
AUXILARY LIMIT
LIMIT
GROUND
LEGEND
PRINTED CIRCUIT
BOARD WIRING
FACTORY WIRING
FIELD WIRING
ORANGE WIRE NUT
GROUND
= TERMINAL PROVIDED
= TERMINAL NOT PROVIDED
WIRE NUT CONNECTIONS
FACTORY WIRING
UNUSED
MOTOR
LEADS
B
U
R
N
E
R
1
1
1
4
7
233
X
H
U
M
C
45
6
N
7
S
2E
A
C
C
O
N
T
C
O
O
L
H
E
A
T
H
M
L
C
F
12
2 1 3
5 4 6
8 7 9
1
2
12
60 Sec.
12
90 Sec.
DELAY OFF DIP SWITCH SETTINGS
12 1212
120 Sec.
12
150 Sec.
L1(H)
N3
S2
K2
K2
K1
K1
N2
N2
L1
0
L2(N)
LOW SPEED HEAT
CONNECTION
MEDIUM SPEED
HEAT CONNECTION
GND
COOL HIGH
LOW
MED
HIGH
MED
LOW
HEAT
HEAT
CONSTANT
COOL
CN6-9 CN6-1
C
LIMIT
CN6-6CN6-3
S1 N1
X
N4S3
CN6-2
CN6-7
CN6-8 BURNER
MOTOR
PRIMARY
ACCESSORY
120VAC
24VAC
LIMIT SENSE
OIL ELECTRONIC FAN TIMER
GND
TRANSFORMER
CN6-4
CONSTANT LOW SPEED
FAN SWITCH
LOW SPEED
FAN SWITCH
UNUSED MOTOR LEAD
L2
UNUSED MOTOR LEAD
CIRCULATION BLOWER
CIRCULATION
BLOWER
CIRCULATION
BLOWER
K1, K2
CONTROL
K3 TSTAT
R
W
Y
G
C
T1 T2
PRIMARY
115 VAC 1ø 60HZ POWER SUPPLY
(FUSED DISCONNECT ON HOT LEG)
(1) MAKE FIELD POWER SUPPLY CONNECTIONS TO BLACK AND WHITE WIRES CAPPED
WITH ORANGE WIRE NUTS.
(2) WARNING--- UNIT MUST BE GROUNDED. WIRING MUST CONFORM TO N.E.C. AND
LOCAL CODES. IN CANADA WIRING MUST CONFORM TO CURRENT CSA 22.1 CANADIAN
ELECTRICAL CODE PART 1 AND/OR LOCAL CODES.
(3) IF ANY OF THE ORIGINAL WIRE AS SUPPLIED WITH THE FURNACE MUST BE REPLACED,
IT MUST BE REPLACED WITH WIRING MATERIAL HAVING A TEMPERATURE RATING OF
AT LEAST 105°C AND BE A MINIMUM OF 16 GA. AWG COPPER STRAND WIRE. USE
COPPER WIRE ONLY FOR FIELD WIRING.
(4) CONNECT REQUIRED MOTOR LEAD TO HEAT TERMINAL ON CIRCUIT BOARD TO DELIVER
A TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE.
(5) SET THE HEAT ANTICIPATOR ON THE THERMOSTAT AT .2 AMPS.
(6) FOR ELECTRICAL LOAD AMPERES, BRANCH CIRCUIT AMPACITY AND MAXIMUM FUSE
SIZE SEE FURNACE MODEL LABEL.
(7) HUM TERMINAL IS 115V.
HML
C
INDOOR
BLOWER
MOTOR
LOW SPEED HEAT
CONNECTION DETAIL
BR
BR
CAP
UNUSED
MOTOR
LEADS
B
U
R
N
E
R
1
12334
S
2
E
A
C
C
O
N
T
C
O
O
L
H
E
A
T
F
1 2 3 4
RD
RD
RD/BK
WH
BKBLYL
RD
RD
L
FIXED COOL
ANTICIPATOR
ADJUSTABLE
HEATING
ANTICIPATOR
TEMP
FALL
TYPICAL THERMOSTAT
COOL
OFF FAN
AUTO ON
HEAT
W
R1 W1 Y1
GW R Y C I
YRG
DELAY OFF
SELECTION
DIP SWITCH
DELAY OFF
SELECT
CN6
VI
BK
BURNER
MOTOR
WH
WH
CN6
WH
OR YL BLBK
L1 L2 ORANGE
FLAME DETECT
ENLARGED TOP VIEW
CAD CELL
(BLACK)(WHITE)
INTERUPTED OIL PRIMARY CONTROL
T1 T2
BK
OR
COOLING
CONTACTOR
(IN AIR
CONDITIONER,
IF USED)
WH
BK L1 (H)
L2 (N)
GND
BL
YL
WH
- - -
- - -
- - -
- - -
- - -
- - -
1 2 3 4
BK
WH RD RD
YL
BL
Honeywell
NOTES:
POWER SUPPLY
115 VAC /1Ø 60 HZ
(FUSED DISCONNECT ON HOT LEG)
MEDIUM SPEED
HEAT CONNECTION
ST9103
N5
ELECTRONIC AIR
CLEANER
(OPTIONAL)
EAC
HUM N6
HUMIDIFIER
(OPTIONAL)
SEE
NOTE 7
FACTORY SET
HEATING SPEED
105-- MED (M)
125-- MED (M)
155-- HIGH (H)
A96380
Fig. 7−Wiring Diagram
—14—

—15—

© 2000 CAC/BDP P.O. Box 70, Indianapolis, IN 46206 impo8l03 —16— Catalog No. 63PO-8LI