Carrier OBMAAB User manual

Installation Instructions
NOTE: Read the entire instruction manual before starting the
installation.
NOTE: Please retain these instructions with the furnace after
installation for future reference.
SAFETY CONSIDERATIONS
FURNACE RELIABILITY HAZARD
Improper installation or misapplication of furnace may
require excessive servicing or cause premature component
failure.
Application of this furnace should be indoors with special
attention given to vent sizing and material combustion air
requirements, gas input rate. air temperature rise. unit
leveling, and unit sizing.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS ......................... 1
INTRODUCTION ................................... 3
LOCATION ........................................ 3
CONFIGURATIONS ................................. 3
INSTALLATION .................................... 5
START-UR ADJUSTMENT AND SAFETY CHECKOUT . . 17
CARE AND MAINTENANCE ........................ 19
Installing and servicing heating equipment can be hazardous due to
gas and electrical components. Only trained and qualified
personnel should install, repail; or service heating equipment.
Untrained personnel can perform basic maintenance functions such
as cleaning and replacing air filters. All other operations must be
performed by trained service personnel. When working on heating
equipment, observe precautions in literature, on tags, and on labels
attached to or shipped with unit and other safety precautions that
may apply.
These instructions cover the minimum requirements and conform
to existing national standards and safety codes. In some instances,
these instructions exceed certain local codes and ordinances.
especially those that may not have kept up with changing
residential construction practices. We require these instructions as a
minimum for a safe installation.
Fig. 1 - OBMAA Multipoise Oil Furnace
A07162
Wear safety glasses and work gloves. Have a fire extinguisher
available during start-up and adjustment procedures and service
calls.
Recognize safety information. This is the safety-alert symbol £t_.
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 may result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability, or
operation.

la.75 _
_76.s r_
18,00
o
41.50
(!054.1mm}
VUE AVANT
FRONT VEW
19.00¸¸
482.6 ram)
1
*OUVERTURE CONDUIT/DUCT OPENING
INSTALLATION HORIZONTALE AVEC BASE RETOUR DE PLANCHER IFRB 1011
HORIZONTAL INSTALLATION WITH FLOOR RETURN BASE (FRB I011
46.50" "19.eo_
i...................
20-25 o _ ' _9.00
(514,4 ram) © . ! ram)
VUE AVANT FRB 101 j VUE DESSOUS
FRONT VIEW BOTTOM VIEW
* OUVERTURE CONDUIT/DUCT OPENING
Fig. 2 - Dimensional Drawing
A07649
FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury,
death, and/or property damage.
These instructions are intended to be used by qualified
personnel who have been trained in installing this type of
furnace.
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal injury,
death, and/or property damage.
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.
For use with grade 1 or 2 fuel oil. Do not use gasoline,
crankcase oil, or any oil containing gasoline!
Never burn garbage or paper in the heating system and never
leave rags, paper, or any flammable items around the unit.
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 ELECTRIC CODE
CSA B139: INSTALLATION CODE FOR OIL BURNING
EQUIPMENT
CSA C22.1: CANADIAN ELECTRICAL (:ODE
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.
This furnace is designed for continuous return-air minimum
temperature of 60"F/16°C db. Return-air temperature must not
exceed 80CF/27°C db. Failure to follow these return-air limits
may affect reliability of heat exchangers, motors and controls. (See
Fig. 3.)
MAX80 °F / 27 C
MIN60°F /16 C
Fig. 3 - Return-Air Temperature
A06745

INTRODUCTION
The OBMAA furnace is capable of 3 heat/airflow combinations
by a simple nozzle change. Inputs of 70.000, 84000, and 98,000
BTUH are possible.
This furnace is a multipoise unit. It may be installed in the upflow,
downflow, or horizontal configuration.
PERSONAL INJURY AND UNIT DAMAGE HAZARD
Failure to follow this caution may result in personal injury,
equipment damage or improper operation.
This oil furnace may be used for construction heat provided
that:
-The furnace is permanently installed with all electrical
wiring, piping, venting and ducting installed according to
these installation instructions. A return air duct is provided,
sealed to the furnace casing, and terminated outside the space
containing the furnace. This prevents a negative pressure
condition as created by the circulating air blower, causing a
flame roll-out and/or drawing combustion products into the
structure.
-The furnace is controlled by a thermostat. It may not be "hot
wired" to provide heat continuously to the structure without
thermostatic control.
-Clean outside air is provided for combustion. This is to
minimize the corrosive effects of adhesives, sealers and other
construction materials. It also prevents the entrainment of
drywall dust into combustion air, which can cause fouling and
plugging of furnace components.
-The temperature of the return air to the furnace is maintained
between 60"F (15°C) and 80°F (27°C) with no evening
setback or shutdown. The use of the furnace while the
structure is under construction is deemed to be intermittent
operation per our installation instructions.
-The air temperature rise is within the rated rise range on the
furnace rating plate, and the firing rate has been set to the
nameplate value.
-The filters used to clean the circulating air during the
construction process must be either changed or thoroughly
cleaned prior to occupancy.
-The furnace, ductwork and filters are cleaned, as necessary, to
remove drywall dust and construction debris from all HVAC
system components after construction is completed.
-After construction is complete, verify furnace operating
conditions including ignition, input rate, temperature rise, and
venting, according to the manufacturer's instructions.
The furnace is shipped in the upflow configuration and instructions
on how to change to other positions are included in this manual. 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.
LOCATION
General
This furnace is approved for reduced clearances to combustible
construction, therefore, it may be installed in a closet or similar
enclosure. Since this unit may be installed in an upflow,
counterflow, or horizontal position, 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 and must not slope toward the front.
ELECTRICAL SHOCK OR UNIT DAMAGE HAZARD
Failure to follow this warning could result in personal injury,
death and/or property damage.
This furnace is not watertight 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 damage.
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal injury,
death and/or property damage.
For attic installation, it is important to keep insulation 12 in.
(304.8 ram) or more away from any furnace openings. Some
types of insulating materials may be combustibles.
In a basement, or when installed on floor (as in a crawlspace), it is
recommended that unit be installed on a concrete pad that is 1 - 2
in. (25.4 - 50.8 mm)thick.
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.CONFIGURATIONS
Upflow Installation
The return air opening may be located on either side of the furnace.
Care should be taken not to damage the wires inside while cutting
the opening. Install the filter rack supplied with the unit according
to the instructions provided with it. It is also recommended to
install the blower door before handling or moving the unit. In
cases where the return air enters through the base of the furnace,
the floor return base (KLADC0301098) must be used.
t t t
WARM AIR
AIR CHAUD
©
Filter rack 20" x 20" ]
508mm x 508mm 1
AIR RETURN
RETOUR D'A_R
floorC°mbustible ]
A07643
Fig. 4- Upflow Configuration
Downflow Installation
When the furnace is installed in the downflow position on a
combustible floor, the clearances from combustibles must be
adhered to. The downflow base KLASB0701098 can be used to
ensure these clearances. Refer to Fig. 5 and the installation
instructions provided with the base.
In cases where the return air enters through the furnace bottom
inlet, the floor return base KLADC0301098 must be used.

Table1-Minimum Clearances to Combustible Materials (in. /mm)
LOCATION UPFLOW
SIDES Furnace I 1 /25.4
Plenum and Warm-Air Duct within 6 ft. (1.8 M) of Furnace 1 2 /50.8
BOTTOM Furnace z 0
BACK Furnace (Opposite side of the Burner) t 3 /78.2
Plenum or Horizontal Warm-Air Duct within 6 ft. (1.8 M) of 2 /50.8
TOP Furnace 2
Furnace :_ N/A
FLUE PIPE Around Flue Pipe 9 /228.6
FRONT Furnace (Burner Bide) I 18 /457.2
1, These are horizontal dimensions
2, These are vertical dimensions
3, This dimension can be obtained by using Horizontal Flow Base # KLASB0801098
4, This dimension can be obtained by using Downflow Base # KLASB0701098
HORIZONTAL
N/A
1/25.4
1/25.4'j
1/25.4
2/50.8
2/50.8
9/228.6
18 /457.2
DOWN
1/25.4
2/50.8
2/50.84
3/78.2
2/50.8
N/A
9/228.6
18 /457.2
AIR RETURN
RETOUR D'AIR
L
--ILl I WARM AIR
t' Ti
Filter rack 20" x 20"
(508mm x 508mm)
Floor Return Base
KLADC0301 098
Downflow Base
KLASB0701098
A07644
Fig. 5-Downflow Configuration
Horizontal Installation
When installed in a horizontal position, furnace may be suspended
by using an angle iron frame, as long as total weight of both
furnace and frame are allowed far in support calculations. (Other
methods of suspending are acceptable.)
When the furnace is installed in the horizontal position, either
suspended or on a combustible floor with a choice of right or left
discharge, the clearances from combustible material must be
adhered to. If the unit is installed on a combustible floor, the
horizontal subbase (KLASB0801098) can be used to ensure these
clearances. Refer to Fig. 6 and the instructions supplied with the
base. In cases where the return air enters through the furnace base
panel, the floor return base (KLADC0301098) must be used.
WARM AIR
AIR CHAUD
Figure 4
i Floor Return Base KLADC0301098 i
_ aupe_ I X,_
f "
Her zonta F oor Filter rack 20" x 20"
BaseKLASB0801098[I (508mmxS08mm) I
AIRRETURN
RETOUR D'AIR
Fig. 6- Horizontal Configuration
A07645
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.
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.
[;NIT DAMAGE HAZARD
Failure to follow this caution may reduce the life of this unit.
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. Heat exchanger failure due to
improper installation may not be covered by warranty.

INSTALLATION
Step 1 -- Ductwork Recommendations
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury or
death.
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.
UNIT MAY NOT OPERATE
Failure to follow this caution may result in intermittent unit
operation.
I 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. Ductwork 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 ductwork should be attached to flanged front opening
provided at discharge end of furnace. The return-air ductwork
should be attached to flanged rear opening of furnace. See Fig. 2
for dimensions of these openings.
NOTE: The Nower access opening should not be used for return
air.
The following recommendations should be followed when
installing ductwork:
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 non-combustible 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. (3.0 M) (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.
Step 2 -- Air for Combustion and Ventilation
CARBON MONOXIDE, FIRE HAZARD
Failure to follow this warning could result in personal injury,
death and/or property damage.
Do not block combustion-air openings in the furnace. Any
blockage could result in improper combustion.
CARBON MONOXIDE, UNIT RELIABILITY HAZARD
Failure to folk_w this warning could result in personal injury,
death and/or property damage.
Comply with NFPA 31 (U.S.) and CSA B139 (Canada
standards for the installation of Oil Burning equipment and
applicable provisions of local building codes to provide
combustion and ventilation air.
Contaminated Combustion Air
Installations in certain areas or types of structures vail increase the
exposure to chemicals or halogens that may harm the furnace.
These conditions will require that only outside air be used for
combustion.
The following areas or types of structures may contain or be
exposed to certain substances, potentially requiring outside air for
combustion:
a. Commercial buildings
b. Buildings with indoor pools
c. Furnaces installed near chemical storage areas
Exposure to the following substances:
a. Permanent wave chemicals for hair
b. Chlorinated waxes and cleaners
c. Chlorine based swimming pool chemicals
d. Water softening chemicals
e. De-icing salts or chemicals
f. Carbon tetrachloride
g. Halogen type refrigerants
h. Cleaning solvents (such as perchloroethylene)
i. Printing inks, paint removers, varnishes, etc.
j. Hydrochloric acid
k. Solvent based glue
1. Antistatic fabric softeners for clothes dryers
m. Acid based masonry cleaning materials
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
or B139.)
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.
2. Sooting.
3. Melted oil burner igniter/relay control.

4.Airbandorairturbulatorsettingsmoreopenthannormal.
5.Lockoutsonstart-up.
Therequirementsforcombustionandventilationairdepend
uponwhetherfurnaceis locatedin a CONFINEDor
UNCONFINEDspace.
UnconfinedSpace
An unconfined space must have at least 50 cu ft for each 1,000
BTUH of total input for all the appliances (such as furnaces,
clothes dryers, water heaters, etc.) in the space.
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. (Refer to Table 2.)
Table 2-Minimum Floor Area For Unconfined Space
FURNACE MINIMUM SQ FTWITH
INPUT BTUH 7-1/2 FT CEILING
70,000 467
84,000 560
98,000 654
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.
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 caulking or sealants are applied to areas such
as joints around windows 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 5,000 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 cannot
be blocked at any time.
Confined Space
A confined space has a volume of less than 50 cu ft per 1,000
BTUH of the total input rating for all appliances installed in that
space.
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 louver or
grille is known, it shall be used in calculating size and free area
specified. If design and free area are not known, it may be assumed
that wood louvers have 20% free area and metal louvers and grilles
have 60% 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.
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.
WARM AIR
AIR CHAUD
457.2mEm
=--_ F--_ T 6"
t 8"
j203.2mm
-q i i ',
...... 4
.......... q
@203;_3m
_ 457-2r_1 I j_ 152.4mm
A07642
Fig. 7 - Ventilation Air Openings in a Closet Door
The openings should be located in front of the furnace,
approximately 6 in. (152.4 mm) above the floor and 6in. (152.4
mm) below the ceiling. Refer to Fig. 6 for minimum dimensions
required and location of the openings.
All Air From Outside of Structure
If outside air is supplied to aconfined space, then the 2 openings
must be equal and located as above.
1. If combustion air is taken through apermanent opening
directly communicating with the outdoors, the opening shall
have a minimum free area of 1 sq in. per 4.000 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 4,000 BTUH of the total input for all
equipment within the confined space. (See Fig. 8 and 9.)
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 2,000 BTUH of the total input for all
equipment within the confined space. (See Fig. 10.)
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. (76.2 mm).

TheOutletairductandInletairductmusthavefreeareaofnotlessthan1square
inchper4000BTUHbasedonthetotalinputratingofallappliancesinthespace.
Thetotalfreeareaortheventilationlouversmusthaveafreeareaofnotlessthan1
squareinchper5000BTUHbasedonthetotalinputratingofallappliancesinthe
space.
Fig.8 = Combustion Air Taken From Outdoors Through Vertical Ducts
(without louvers in foundation)
....... Chimney
A06463
Ventilation louvers for
unheated crawlspace
The Outlet air duct and Inlet air duct must have a free area of not less than 1 square
inch per 4000 BTUH based on the total input rating of all appliances in the space.
The total free area or the ventilation louvers must have a free area of not less than 1
square inch per 5000 BTUH based on the total input rating of all applinaces in the
space.
Fig. 9 -('ombustion Air Taken From Outdoors Through Vertical Ducts
(with crawlspace louvers)
A06464

The Outlet air duct and Inlet air duct must have a free area of not less than 1 square
inch per 2000 BTUH based on the total input rating of all appliances in the space.
Fig. 10 - Combustion Air Taken From Outdoors Through Horizontal Ducts
A06465
I!/
The top opening and the bottom opening must each be 8 in.x 18 in.
(203.2mm x 457.2mm) when a furnace is installed.
Fig. 11 - Flee Area Openings
A06466
Step 3 -- 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 Burnin_ Appliances
and/or CSA B139 Installation Code.
This furnace is certified for use with Type "L" vent (maximum flue
gas temperature 575°F/302°C).
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.)

CARBONMONOXIDEPOISONINGHAZARD
Failuretofollowthiswarningcouldresultinpersonalinjury
ordeath.
Thefollowingstepsshallbefollowedforeachappliance
connectedtotheventingsystembeingplacedintooperation,
whileallotherappliancesconnectedtotheventingsystemare
notinoperation:
1.Sealanyunusedopeningsinventingsystem.
2.Inspecttheventingsystemforpropersizeandhorizontal
pitch,asrequiredintheNFPA31,InstallationofOilBurning
EquipmentandtheCanadianStandardB140.4OilFiredWarm
Air Furnaces.Determinethatthereis noblockageor
restriction,leakage,corrosionandotherdeficiencieswhich
couldcauseanunsafecondition.
3.As faraspractical,closeallbuildingdoorsandwindows
andalldoorsbetweenthespaceinwhichtheappliance(s)
connectedtotheventingsystemarelocatedandotherspaces
ofthebuilding.
4.(?losefireplacedampers.
5.Turnonclothesdryersandanyappliancenotconnectedto
theventingsystem.Turnonanyexhaustfans,suchasrange
hoodsandbathroomexhausts,sotheyareoperatingat
maximumspeed.Donotoperateasummerexhaustfan.
6.Followthelightinginstructions.Placetheappliancebeing
inspectedintooperation.Adjustthethermostatsoapplianceis
operatingcontinuously.
7.Testforspillagefromdraft-hoodequippedappliancesatthe
draft-hoodreliefopeningafter5minutesofmainburner
operation.Usetheflameofamatchorcandle.
8.If improperventingisobservedduringanyoftheabove
tests,theventingsystemmustbecorrectedinaccordancewith
theNFPA31,InstallationofOilBurningEquipmentandthe
CanadianStandardB140.4OilFiredWarmAirFurnaces.
9.Afterithasbeendeterminedthateachapplianceconnected
totheventingsystemproperlyventswhentestedasoutlined
above,returndoors,windows,exhaustfans,fireplacedampers,
andanyothergas-firedburningappliancetotheirprevious
conditionsofuse.
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.
4. All pipe should be supported using proper clamps and/or
straps. These supports should be at least every 4 ft. (1.2 M)
5. All horizontal runs of pipe should have at least 1/4 in. (6.35
mm) 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. (.91 M) above highest point
where it passes through the roof of a building and at least 2
ft. (.6 M) higher than any portion of a building within a
horizontal distance of 10 ft. (3 M). It shall also be extended
at least 5 ft. (1.5 M) above highest connected equipment
flue collar.
10. Check local codes for any variance.
Step 4 -- Factory-Built Chimneys
Listed factory-built chimneys may be used. Refer to chimney
manufacturer's instructions for proper installation.
Step 5 -- 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.
Step 6 -- Blocked Vent Shut-Off (BVSO) For
Chimney Venting
All oil furnaces installed in Canada must have a Blocked Vent
Shut-Off.
Refer to Fig. 13-14 and the installation instructions supplied with
the Blocked Vent Shut-Off for installation and wiring procedures.
The Blocked Vent Shut-Off must be installed in the flue between 2
in and 12 in. (304.8 mm) from the furnace outlet and between the
furnace outlet and draft regulator. (See Fig. 13.)
FIRE, CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury,
death and/or property damage.
DO NOT reset the device or restart the furnace unless the
cause of the interruption has been identified and corrected by
a qualified agency. Ensure that the Blocked Vent Shut-Off
has been cleaned by a qualified agency before placing into
service. Annual inspection and cleaning of the Blocked Vent
Shut-Off by a qualified agency is required.

EQUIPMENT GROUND
GROUND SCREW
= @
BVSO LIMtT
120VAC (LI(HOT)
FROM
APPLIANCE _ L2(NUETRAL)
f....
I
{
/
I BURNER JUNCTION BOX
I
/
BLACK
WHITE
VIOLET
BLUE
ORANGE
YELLOW
YELLOW
L1
AO----
L2 A O-----
VALVE PRIMARY
CONTROL
IGNITION
T O -m-
MOTOR T O-----
CAD CELL
CAD CELL
- - TO REMOTE LOW VOLTAGE AC
ALARM CIRCUIT (OFF LINED)
--ON DELETED MODELS
24 VAC
THERMOSTAT
Fig. 12 - Honeywell R7184P - Beckett Burner
A06402
FIRE, CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury,
death and/or property damage.
The Blocked Vent Shut-Off MUST be inspected and
maintained annually by a qualified agency.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Disconnect electrical power supply to the furnace before
wiring the Blocked Vent Shut-Off.
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and
wear appropriate protective clothing, safety glasses, and
gloves when handling parts and servicing furnaces.
FIRE, CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury,
death and/or property damage.
Do not dent or scratch the surface of the thermal switch. The
thermal switch MUST be replaced if it is damaged.
Step 7 -- Oil Burner (Also refer to the burner
manufacturer's instructions.)
This furnace is supplied with a high-pressure atomizing retention
head-type burner (for use with grade 1 or 2 Fuel Oil). The burner
comes equipped with a .5GPH nozzle. However, if another size or
a replacement nozzle is required, use the manufacturer's
recommended spray angle and type as shown in Technical
Specifications. Always select nozzle sizes by working back from
the desired flow rate at operating pressure and not the nozzle
marking. For detailed instructions on changing nozzles, refer to
instructions provided with oil burner. The oil pump is set to
operate on a single line system. To operate on a two-line system
the by-pass plug must be installed. Refer to instructions provided
with burner.
Installation
1. Remove nuts from mounting flange.
2. Position the mounting gasket between the mounting flange
and the burner mounting plate.
3. Align the holes in the burner mounting plate with the studs
on the mounting flange and bolt securely in place.
NOTE: Regardless of orientation of furnace, burner should
always be installed in the upright position.
4. Make the electrical connections.
5. Complete oil line connections.
Oil Pressure Regulator
The oil pressure regulator is factory set to give oil pressure of 145
psig for an input of 84,000 Btuh. Other firing rates noted on
nameplate may be obtained using the nozzles and pump pressures
indicated in Table 4. An adjustment screw and connection for a
pressure gauge are located on the oil pump for necessary
adjustments. Refer to instructions supplied with burner for
adjustment procedure.
10

\
O O
\
o o
Fig. 13 -BVSO Placement
©
7
A07877
11

DNS-1099 Rev.A
Fig. 14 - BVSO Wiring
A07878
12

BURNER CON'IROL BOX
FACTORY_RED
Diagram B
Riello
Fig. 15 -Wiring Diagram for Riello Burner
A06403
Air and Turbulator Settings
Before starting the burner for the first time, adjust the air and
turbulator settings to those listed in this manual. Upon startup,
final adjustments will be required.
Step 8 -- Oil Connections
Complete instructions for installing fuel oil piping can be found in
oil burner Installation Instructions included with the burner.
An oil filter should be used with all oil burners and should be
installed as close to burner as possible. We recommend the use of
a low-pressure drop oil filter such as the General Filter Inc. model
#1A-25A or equivalent.
UNIT COMPONENT HAZARD
Failure to follow this caution may result in unit component
damage.
This burner is shipped with the oil pump set to operate on a
single line system. To operate on a two-line system the
by-pass plug must be installed. Do not operate a single line
system with the by-pass plug installed. Operating a single line
system with the by-pass plug installed will result in damage to
the pump shaft seal. Pump pressure must be set at time of
burner start-up. A pressure gauge must be attached to the
PRESSURE PORT for pressure readings. Two PIPE
CONNECTORS are supplied with the burner for connection
of lines to burner pipe connectors. On units equipped with
Riello burners, all pump port threads are British Parallel
Thread design. Direct connection of NPT threads to the pump
will damage the pump body. Riello manometers and vacuum
gauges do not require any adapters, and can be safely
connected to the pump ports. An NPT (metric) adapter (Part
No. N05F017) must be used when connecting other gauge
models.
OIL TANK
PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in personal
injury or death.
Use only approved heating type oil in this furnace. DO
NOT USE waste oil. used motor oil, gasoline or kerosene.
UNIT OPERATION HAZARD
Failure to follow this caution may result in improper unit
operation.
When a 0.75 USGPH or smaller nozzle is used. a 10 micron
or finer filter, must be installed on the oil supply line to the
furnace inside the building where the unit is located. This is
a requirement in order for the heat exchanger warranty to
remain in force.
Check your local codes for the installation of the oil tank and
accessories.
At the beginning of each heating season or once a year, check the
complete oil distribution system for leaks.
Ensure that the tank is full of clean oil. Use No.1 or No.2 Heating
Oil (ASTM D396 U.S.) or in Canada, use No.1 or No.2 Furnace
Oil.
A manual shut-off valve and an oil filter shall be installed in
sequence from tank to burner. Be sure that the oil line is clean
before connecting to the burner. The oil line should be protected to
eliminate any possible damage. The fuel pump may be installed
with gravity feed or lift. The maximum allowable lift for a single
pipe installation is 8 ft. (2.4 M) Follow the pump instructions to
determine the size of pipe needed in relation to the rise or to the
horizontal distance.
ELECTRICAL CONNECTIONS
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
The unit cabinet must have an uninterrupted or unbroken
electrical ground. A green ground screw is provided in
control box for this connection.
l15-V Wiring
Before proceeding with electrical connections, make certain that
voltage, frequency, and phase correspond to that specified on unit
rating plate. AIso, check to be sure that service provided by utility
is sufficient to handle load imposed by this equipment. Refer to
rating plate or Table 3 for equipment electrical specifications.
Make all electrical connections in accordance with National
Electrical Code (NEC) ANSI/NFPA 70-2008 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 sub-authorities having jurisdiction.
13

Thecontrolsystemdependsoncorrectpolarityofpowersupply.
ConnectHOTwire(H)andNEUTRALwire(N)asshowninFig.
14.
FIREHAZARD
Failure to follow this warning could result in personal injury,
death, or property damage.
Do not connect aluminum wire between disconnect switch and
furnace. Use only copper wire.
A separate line voltage supply MUST be used with a fused
disconnect switch or circuit breaker between main power panel and
unit. (See Fig. 14.)
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 furnace wiring, use wire of same gauge and
temperature resistance rating as original wiring.
24-V Wiring
A thermostat must be installed to control the temperature of the
area to be heated. Instructions for wiring thermostat (field
supplied) are packed in thermostat box. Make thermostat
connections as shown in Fig. 16 at 24-v terminal board on
electronic control board. Also refer to wiring diagrams provided
with the heating/air conditioning unit, and to Fig. 17.
FOURNAISE AU
MAZOUT CLIMATISEUR
THERMOSTAT OIL FURNACE A_R CONDITIONER
DNS-I076 RevB
A07648
Fig. 16 -Thermostat Wiring
electronic board. It supplies 120 VAC electric power when the
burner is in operation.
A 24 VAC signal can also be supplied from the W and C terminals
on the blower electronic board to activate a switching relay.
Also refer to the instructions supplied with the accessory.
Electronic Air Cleaner (EAC)
The EAC terminal on the electronic board supplies 120 VAC when
the blower is operating in the heating or air conditioning mode.
This signal can be used to activate an electronic air cleaner that is
not equipped with an air flow switch. If the cleaner is equipped
with an air flow switch, the S terminal on the electronic board can
be used to provide a constant supply of 120 VAC. Also refer to the
instructions supplied with the accessory.
Air Conditioner (or Heat Pump)
An air conditioning coil may be installed on the supply air side
ONLY.
A clearance of 6 in. (152.4 mm) is required between the bottom of
the coil drain pan and the top of the heat exchanger. If a heat pump
is installed, a "dual energy" thermostat, or other control is required,
in order to prevent the simultaneous operation of the furnace and
the heat pump. It also prevents a direct transition from heating by
way of the heat pump to heating with oil. Refer to the thermostat
instructions or those of another control used for the proper wiring.
CARBON MONOXIDE HAZARD
Failure to follow this warning could result in personal injury
or death.
Install the evaporator coil on the supply side of the furnace
ducting ONLY.
An evaporator coil installed on the return air side of the
ducting can cause condensation to form inside the heat
exchanger, resulting in heat exchanger failure. This in turn,
can result in death, bodily injury and /or property damage.
If a coil blower compartment is used. install air tight, motorized
and automatic air dampers. Cold air coming from the coil and
passing across the furnace can cause condensation and shorten the
life of the heat exchanger.
ACCESSORIES
When installing optional accessories to this appliance, follow
manufacturer's installation instructions included with accessory.
Other than wiring for thermostat, wire with aminimum of type "T"
insulation (63_'F/17°C rise) must be used for accessories.
Installation of Accessories
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Turn OFF electrical power at the fuse box or service panel
before making any electrical connections and ensure a
proper ground connection is made before connecting line
voltage.
FIRE, CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
Never operate unit without a filter or with filter access door
removed.
Filters
An external filter support is provided and as standard equipment
with this furnace, and is shipped in the blower compartment of this
furnace. Refer to Fig. 4-6 and installation instructions provided
with filter support. A sufficient clearance should be provided for
air filter access. Refer to Technical Specifications for filter size and
filter rack flange dimensions for return air duct.
Humidifier (HUM)
The 120 VAC HUM terminal on the electronic board of the blower
is tied directly to terminal 8 of the 9-terminal connector of the
14

Table 3 -Technical Specifications
MODEL OBM098SD (1/3 HP PSC)
RATING AND PERFORMANCE
Firing rate (USGPH) 0.5 0.6 0.7
Input (BTU/h) 70,000 84,000 98,000
Heating temperature rise (Degree. F /C) 55-85°F (13-29°C)
Flue draft (inch of w.c.) -0.06 to -0.025
Overfire pressure (inch of w.c.) -0.035 to +0.010
BECKETT BURNER; MODEL NX
Head type 6 -Slot
Nozzle (DeIavan) 0.40 - 60A 0.50 - 60A 0.60 - 60A
Pump pressure (PSIG) 155 145 135
Head/Air setting 0.5 1.5 2.5
Heating capacity (BTU/h) 59,200 70,400 80,800
AFUE % 84 83.9 81.6
RIELLO BURNER; MODEL 40-F3
Nozzle (Delavan) 0.40 - 70A 0.50 - 70A 0.60 - 70A
Pump pressure (PSIG) 155 145 135
Combustion air adjustment (turbulator/damper) 0 /1.5 0 /2.5 1 /3.5
Heating capacity (BTU/h) 59,200 70,100 80,600
AFUE % (with air inlet damper) 84.3 83.9 83.5
ELECTRICAL SYSTEM
Volts - Hertz -Phase 115 - 60 -1
Operating voltage range (volts) 104 - 132
Rated current (Amps) 12.2
Minimum ampacity for wire sizing (Amps) 13.7
Max. fuse size (Amps) 15
Control transformer (VA) 40
External control power available Heating (VA) 40
Cooling (VA) 30
BLOWER DATA (side air return)
Heating blower speed at 0.25" W.C. SP MED-LOW MED-HIGH HIGH
Air flow at 0.25" W.C. SP (CFM) 860 1025 1165
Air flow at 0.50" W.C. SP (CFM) 795 925 1050
Motor (HP) /number of speeds 1/3 HP /4 Speeds
Blower wheel size (diameter x width) 10" X 8"
GENERAL INFORMATION 16.875" x 20 1/6" x 40 3/4" /
Overall dimensions (width x depth x height) 428.6 x 512.2 x 1035.1 mm
Supply air opening 16" x 19" /406.4 x 482.6 mm
Return air opening 19" x 19" /482.6 x 482.6 mm
Filter size 20" x 20" /508 x 508 mm
Shipping weight Lbs/Kg 125 / 57
Air conditioning, maximum output (tons) 3
15

"-4
I
5:
BOARD #BT9105
3N BL_C_%V_NT
,I_GR (MANDATORY
LI (H) 115 VAC FOR
L2 (N) poWER SUPPLY CANADA ONLY)
.... _N Rs)i_ 3 F45
* E I I _
o L o..o,, o t_ .... =
L B.... \([um el RE[ __ _
BLU_1J_ RE_
WHITE _
_ AA ORANGE
G c _ z_
CN _
CONSTAN7 LOW ML z ._ ORANGEWIREON: OILFIRED
SPEEB SNTCM -- _ MOTORWIREOR, BURNER
REDMH _Lo___E_Eg_'
BLUE HI CAPACITOR FOR BURNERQ1RING
DIAGRAM,REFERTOBURNER
WHITE C LABELS ANB INSTRUCTIONS
BOARD #1158
STANDARD HEAT /COOL WIRING DIAGRAM WITH ELECTRONIC FAN TIMER WHEN HEATING & COOLING SPEEDS ARE THE SAME
REMOVE JUMPER AND CONNECT RED WIRE TO THE "HEAT" TERMINAL WHEN DIFFERENT HEATING & COOLING BLOWER SPEEDS
ARE REQUIRED (REFER TO INSTRUCTION MANUAL ALSO)
USE ONLY COPPER WIRE
FOR HUMIDIFIER, REMOVE THE DUMMY TERMINAL MARKED HUM*
FOR ELECTRONIC AIR CLEANER, REMOVE THE DUMMY TERMINAL MARKED EAC.
DNS 1077 Rev.B
BOARD #ST9105
DELAY OFF DIP SWITCHSETTINGS
LI H 11S VAC lph/ BOHZ.pOWERSUPPLY L2 N
_( ....................... ) L_
_ GR,I_<_ N_
K2 COOL
JUMPER
_[]_CN69 CN6 I CN6_]C[_N7_[]_2 CN6 4
BLOCKED VENT SHUT CN74
OFF_............ _2__÷
CANADA ONLY) CN67_ ] CN7 2
N_
CN6[_ Y
_ BOARD #1158
ON AND OFF DELAYS ARE
INDEPENDENT FROM EACH OTHER
OTHER COMBINATIONS ARE POSSIBLE
_9 Re_

START-UP, ADJUSTMENT, AND SAFETY
CHECKOUT
Step 1 -- Operational Checkout
Installation of furnace is now complete. Perform the following
checkout procedures.
1. Correct nozzle size has been selected for desired input rate.
2. Preliminary air adjustments on the burner comply with the
technical specifications of this manual.
3. The blower speed adjustments fnr heating and cooling are
appropriate and according to the technical specifications of
this manual.
4. Electrical wiring is completed according to Fig. 17.
5. Blower rail locking screw is tightened, and
6. Blower access door is secured in place.
7. Valve on oil supply line is open.
8. RESET BUTTON on primary control is pushed in or reset.
9. The Blocked Vent Shut-off (BVSO) is installed (if applic-
able) according to instructions provided.
10. Thermostat is set fnr 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.
Purging Oil Line
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:
1. Place a piece of clear plastic 1/4-in. diameter tubing over
purge fitting on oil pump.
2. Start oil burner, then open purge fitting and allow burner to
run until purge tube is completely free of air bubbles.
3. Tighten purge fitting. Allow oil to run to nozzle and the
burner.
4. If purging takes longer than 15 sec and no flanm has been
established, burner stops. Push reset button on front of
primary control to restart burner.
Operating Sequence - Oil Heating Mode
1. The W-R contact closes.
2. The burner motor starts up to pc-purge the combustion
chamber for a period of 10 to 15 seconds. During that time
a spark is established on the electrodes.
3. The solenoid valve opens and a flame is established.
Shortly after, the electrodes cease to spark.
4. The blower runs up to full speed. The delay depends on the
adjustment that were made on the electronic board, which
controls the blower motor. Refer to Supply Air Adjustment
section, as well as the CFM Table 6 for more details.
5. When the call for heat is satisfied, the solenoid valve closes,
the burner motor stops and the flame goes out.
6. The blower stops shortly after the burner. The delay de-
pends on the adjustments that were made on the electronic
board that controls the blower. Refer to Supply Air Adjust-
ment Sections as well as the CFM table for more details.
NOTE: A detailed operating sequence of the oil burner is outlined
in the instructions provided with the burner.
Step 2 -- 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.
CO2, oil-pump pressure, 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 nmst
be taken are smoke number, over-fire draft, stack draft, and
oil pump pressure.
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.
a. Pierce a test hole in the smoke pipe. near the furnace
breach. Insert the smoke test probe into the hole.
b. Starting with a 0 smoke reading, gradually reduce the
burner air setting until just a trace of smoke results. (#1
on the Bacharach Scale).
c. Take a CO 2 sample at the same test location where the
#1 smoke reading was taken and make note of it.
d. Adjust the burner air setting to obtain a CO 2 reading
1% lower than the reading associated with the #1
smoke.
This method of adjusting the burner will result in clean
combustion and ensure the proper functioning of the
system.
3. In order to ensure proper draft through furnace, a barometric
draft regulator (supplied with furnace) must be installed. In
order for this device to function properly, barometric damp-
er 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 min., and set between -0.025 and
-0.060 in. wc.
4. The over-fire draft, which is taken through the observation
port (located above burner), is a measurement necessary to
determine if there is a blockage between oil burner and flue
outlet.
The over-fire draft must be set within the range shown in
the Technical Specifications.
A reading outside the range would indicate that furnace is in
an extremely high-pressure condition in primary section.
This condition may be caused by any of the following prob-
lems:
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 the values listed in Table 4.
FURNACE
INPUT
(BTUH)
70,000
84,000
98,000
Table 4-Burner Input and Nozzle Size
FIRING RATE DELAVAN NOZZLE
GAL/HR (US)* RIELLO 40-F3 BECKETT NX
0.50 0.40- 70A 0.40- 60A
0.60 0.50 - 70A 0.50 - 60A
0.70 0.60 - 70A 0.60 - 60A
PUMP
PRESSURE
(PSIG)
155
145
135
* For rating purposes only.
5. The (:02 and stack-temperature instruments enable you to
obtain data required to determine thermal efficiency of
furnace.
17

Step 3-- Supply Air Adjustment Check
FIRE HAZARD AND UNIT RELIABILITY
Failure to follow this warning could result in personal
injury, death and/or property damage.
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.
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.
The supply air must be adjusted based on heating /air conditioning
output and the stable pressure of the duct system. For the desired
air flow, refer to Table 5 as well as the air flow tables based on
static pressure in Table 6.
Table 5 - Speed Selection
FURNACE
APPLICATION
HEATING
A/C
HEATING INPUT
OR A/C OUTPUT
0.50 USGPH
0.60 USGPH
0.70 USGPH
2.0 Tons
2.5 Tons
3.0 Tons
RECOMMENDED
BLOWER SPEED
Med - Low
Med-High
High
Med- Low
Med-High
High
To effect the adjustment, the RED and BLUE wires can be changed
on the motor. Also, refer to the position of the wires on the
electronic board of the unit and consult the wiring diagrams.
If the heating and air conditioning speeds are the santo, the RED
wire must be moved to "UNUSED LEADS" on the electronic
board and the jumper provided with the BLUE wire must be used
between the "HEAT" and "COOL" terminals.
The blower start/stop delays can be adjusted by positioning the
DIP switches on the electronic board as shown in the following
figures:
DELAY OFF DIP SWITCH SETTINGS
60 See 90 See 120 See t50 See
Honeywell Control Board
120 Sec i 6 M_n 90 See i' 4 MIn
a.OWERO.lBLO_RO_ IBLO_R ON BLOV_ZR OF_
DELAY IDELAy DFJ.Ay IDELAY
BO See 2 Win 30 S_c '1 Min
BLOWER ON BLOWER OFF BLOWER ON BLOV4_R Of}
oE.Yt oELA,LAYI o AY
ON AND OFF DELAYS ARE
iNDEPENDENT FROM EACH OTHER,
OTHER COMBINATIONS ARE POSSIBLE.
UTEC Control Board
Fig. 18 - Fan Off Time Dip Switch Settings
("X" Represents Switch Position)
A06462
Supply Air Temperature Rise Test
1. Operate the burner for at least 10 minutes.
2. Measure the air temperature in the return air plenum.
3. Measuring the air temperature in the largest trunk coming
off the supply air plenum, just outside the range of radiant
heat from the heat exchanger. 12" (304.8 mm) from the ple-
num of the main take-off is usually sufficient.
4. The temperature rise is calculated by subtracting the return
air temperature from the supply air temperature
5. If the temperature rise exceeds the temperature specified in
Table 3, change to the next higher blower speed tap, until
the temperature rise falls to the target or below. If the exces-
sive temperature rise cannot be reduced by increasing fan
speed, investigate for ductwork obstructions, dirty or im-
proper air filter, overfiring caused by excessive pump pres-
sure or improper nozzle sizing.
Step 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.
External Static Pressure ("W.C.)
Speed
High
Meal-High
Med- Low
Low
Table 6 - Air Flow -CFM
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
1250 1205 1170 1115 1070 1010 93.5 825 605
1110 1075 1025 990 945 895 825 715 560
885 880 880 865 815 760 710 615 470
675 680 690 680 665 640 565 480 390
18

CARE AND MAINTENANCE
ELECTRICAL SHOCK, FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal injury,
death and/or property damage.
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.
Step 3-- 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:
BURN HAZARD
Failure to follow this caution may result in personal injury.
If furnace has been in operation, some surfaces may be
hot. Allow time for unit to cool down.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before performing any service functions, unless operations
specifically require power to be on, make sure all utilities
are turned off upstream of appliance.
Step 1 -- 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 clean-out
ports, and a visual inspection of combustion chamber when burner
is removed.
1. Turn off all oil and electrical supplies upstream of furnace.
2. Disconnect flue pipe.
3. Remove flue collar panel located at the rear of furnace.
4. Remove baffle from heat exchanger.
5. Disconnect oil line and remove oil burner from furnace.
6. Clean primary and secondary heat exchanger with stiff
brush and vacuum cleaner.
7. Before re-assembly, the heat exchanger and combustion
chamber should be inspected to determine if replacement is
required.
8. After cleaning, replace baffle, flue collar plate, and oil burn-
er. Reconnect flue pipe and oil line.
9. Re-adjust burner for proper operation.
Step 4- Blocked Vent Shut-Off (BVSO) Cleaning
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal
injury or death.
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 or sooting.
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.
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.
NOTE: ALWAYS KEEP MAIN OIL VALVE TURNED OFF IF
BURNER IS SHUT DOWN FOR AN EXTENDED PERIOD OF
TIME.
Step 2-- Oil Burner
Cleanin_ of the Burner Head
Once annually, remove the retention head and electrodes from the
drawer assembly and remove all foreign matter. Also, extremity of
the burner tube should be inspected and cleaned if necessa W.
For optimum performance, oil-burner nozzle should be replaced
once a year.
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.
FIRE, CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
Do not dent or scratch the surface of the thermal switch.
The thermal switch MUST be replaced if it is damaged.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect electrical power supply to the furnace before
wiring the Blocked Vent Shut-Off.
FIRE, CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury,
death and/or property damage.
The Blocked Vent Shut-Off MUST be inspected and
maintained annually by a qualified agency.
For continuous safe operation, the Blocked Vent Shut-off device
(BVSO) must be inspected and maintained annually by a qualified
service technician.
1. Disconnect power to the appliance.
19

2.RemovethetwoscrewsholdingontheBVSOassembly
cover.
3.Removethecover.
4.Removethetwoscrewsholdingthecontrolboxtotheheat
transfertubeassembly.Slidingthecontrolboxintheap-
propriatedirectionwillunlockitfromtheheattransfertube
assembly.
5.Carefullyremoveanybuild-upfromthethermalswitchsur-
face.
6.Cleanandremoveanybuild-uporobstructioninsidethe
heattransfertube.
7.Re-mount,lockandfastenthecontrolboxwiththetwo
screwsremovedinStep4.
8.Re-attachtheassemblycoverwiththescrewsremovedin
Step2.
9.Re-establishpowertotheunit.
Step5-- Blower Removal
To remove blower from furnace:
1. Turn off all oil and electrical supplies upstream of furnace.
2. Remove blower door.
3. Remove blower retaining screw (on blower shelf).
4. Remove cover from control box and disconnect thermostat
and power wires from the board.
5. Slide blower forward on rails toward front of unit.
6. Reverse items 1 through 5 to re-install blower. Refer to
wiring diagram (Fig. 17) of these instructions or diagram
located on inside of blower door to properly rewire unit.
Copyright 2007 CAC /BDP • 7310 W. Morris St. • indianapolis, iN 46231 Printed in U.SA Edition Date: 10/07
Manufacturer reserves the right to change_ at any time_ specifications and designs without notice and without obligations.
Catalog No: IM-O980BM-01
Replaces: NEW
2O