Rheem OBF Series Installation Instructions Manual

92-22876-27-00

INSTALLATION INSTRUCTIONS

FOR (-)OBF UPFLOW OIL FIRED FURNACES

IMPORTANT: Do not use a power-

robbing electronic thermostat with
this furnace. Use only mechanical
thermostats or battery powered
electronic thermostats.

U.L. recognized fuel gas and CO (carbon monoxide) detectors are recommended in
all applications, and their installation should be in accordance with the
manufacturer’s recommendations and/or local laws, rules, regulations, or customs.

ISO 9001:2000

— Do not store or use gasoline or other flammable vapors and liquids, or other
combustible materials in the vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL FUEL OIL VAPORS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your building.

• Immediately call your fuel oil supplier from a neighbor’s phone. Follow the fuel
oil supplier’s instructions.

• If you cannot reach your fuel oil supplier, call the fire department.

• Do not return to your home until authorized by the fuel oil supplier or
fire department.
— DO NOT RELY ON SMELL ALONE TO DETECT LEAKS. DUE TO VARIOUS
FACTORS, YOU MAY NOT BE ABLE TO SMELL FUEL GASES.

• U.L. recognized fuel gas and CO detectors are recommended in all applications,
and their installation should be in accordance with the manufacturer’s
recommendations and/or local laws, rules, regulations, or customs
— Improper installation, adjustment, alteration, service or maintenance can cause
injury, property damage or death. Refer to this manual. Installation and service must
be performed by a qualified installer, service agency or the fuel oil supplier.

2

IMPORTANT: TO ENSURE PROPER INSTALLATION AND OPERATION OF
THIS PRODUCT, COMPLETELY READ ALL INSTRUCTIONS PRIOR TO
ATTEMPTING TO ASSEMBLE, INSTALL, OPERATE, MAINTAIN OR REPAIR
THIS PRODUCT. ADDITIONALLY, UPON UNPACKING OF FURNACE,
INSPECT ALL PARTS FOR DAMAGE PRIOR TO INSTALLATION AND START
UP.

CONTENTS

SAFETY RULES...................................................................................................3

LOCATION REQUIREMENTS AND CONSIDERATIONS ...................................4

GENERAL INFORMATION ..................................................................................4

Dimensions and Clearances .............................................................................4

Blower Performance Data.................................................................................5

Oil Furnace Specifications ................................................................................5

Selecting Nozzle Size .......................................................................................6

INSTALLATION INSTRUCTIONS........................................................................7

Requirements....................................................................................................7

Location ............................................................................................................7

Combustion Air Supply..........................................................................................7

Circulating Air Supply........................................................................................9

Flue and Chimney Exhaust...............................................................................9

Chimney Size Recommendations.....................................................................9

Venting..............................................................................................................9

Barometric Draft Control .................................................................................10

Oil Burner / Primary Control............................................................................10

Tank and Oil LInes..........................................................................................11

Electric Wiring .................................................................................................11

Thermostat......................................................................................................11

Typical Installation Diagrams ..........................................................................12

Heat Anticipator Settings ................................................................................13

OPERATING INSTRUCTIONS...........................................................................13

Lighting Instructions ........................................................................................13

FURNACE ADJUSTMENT .................................................................................14

Burner Adjustment ..........................................................................................14

Oil Pump/Pump Bleeding and Checking Pump Pressure ...............................16

Electrode Adjustment......................................................................................17

Air Volume Adjustments..................................................................................17

Fan/Limit Control.............................................................................................19

MAINTENANCE..................................................................................................20

Burner Maintenance........................................................................................20

Lubrication ......................................................................................................20

Air Filter...........................................................................................................20

Draft Problems/Troubleshooting .....................................................................21

Oil Burner Data ...............................................................................................22

Troubleshooting ..............................................................................................23

Furnace Adjustment Check Sheet ..................................................................27

WIRING DIAGRAMS ..........................................................................................28

INSTALLER: HANG THESE INSTRUCTIONS

ADJACENT TO FURNACE

HOMEOWNER: KEEP THESE INSTRUCTIONS

FOR FUTURE REFERENCE

3

DO NOT USE THIS FURNACE IF ANY
PART HAS BEEN UNDER WATER. A
FLOOD-DAMAGED FURNACE IS
EXTREMELY DANGEROUS.
ATTEMPTS TO USE THE FURNACE
CAN RESULT IN FIRE OR
EXPLOSION. A QUALIFIED SERVICE
AGENCY SHOULD BE CONTACTED
TO INSPECT THE FURNACE AND TO
REPLACE ALL GAS CONTROLS,
CONTROL SYSTEMS PARTS,
ELECTRICAL PARTS THAT HAVE
BEEN WET OR THE FURNACE, IF
DEEMED NECESSARY.

THIS FURNACE IS DESIGN
CERTIFIED TO OPERATE ON #2
FUEL OIL. DO NOT ATTEMPT TO
CONVERT THIS FURNACE TO
BURN NATURAL GAS OR LP GAS.
FAILURE TO FOLLOW THIS
WARNING CAN CAUSE A FIRE OR
EXPLOSION RESULTING IN
PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH.

1. Do not install this furnace in a
mobile home, trailer or
recreational vehicle.

2. Keep area around furnace free
and clear of combustible materials
including gasoline and other
flammable vapors and liquids.

3. Do not use furnace area for
storage purposes or as a broom
closet.

4. This furnace must be vented
through a good chimney to carry
combustion products outdoors as
described under the VENTING
INSTALLATION section of this
manual.

5. Provide adequate ventilation to the
furnace area.

6. IMPORTANT: Make sure supply
and return air ducts are sealed to
the furnace casing. These ducts
must be entirely separated from
area supplying combustion and
ventilation air.

7. Disconnect electrical power before
servicing appliance.

8. Install this furnace only in a
location and position as specified
in the general information section
of these instructions. Provide
adequate combustion and
ventilation air to the furnace space
as specified in the venting section
of these instructions.

9. Provide adequate combustion and
ventilation air to the furnace space
as specified in venting section of
these instructions.

10. Combustion products must be
discharged outdoors. Connect this
furnace to an approved vent
system only, as specified in the
venting section of these
instructions.

11. Always install furnace to operate
within the furnace’s intended
temperature-rise range with a duct
system which has an external
static pressure within the
allowable range, as specified in
general information section of
these instructions. See furnace
rating plate.

12. When a furnace is installed so that
supply ducts carry air circulated by
the furnace to areas outside the
space containing the furnace, the
return air shall also be handled by
duct(s) sealed to the furnace
casing and terminating outside the
space containing the furnace.

13. The furnace is not to be used for
temporary heating of buildings or
structures under construction.

Important: All Rheem products meet
current Federal OSHA Guidelines for
safety. California Proposition 65
warnings are required for certain
products, which are not covered by the
OSHA standards.

California's Proposition 65 requires
warnings for products sold in California
that contain, or produce, any of over
600 listed chemicals known to the State
of California to cause cancer or birth
defects such as fiberglass insulation,
lead in brass, and combustion products
from natural gas.

All “new equipment” shipped for sale in
California will have labels stating that
the product contains and/or produces
Proposition 65 chemicals. Although we
have not changed our processes,
having the same label on all our
products facilitates manufacturing and
shipping. We cannot always know
“when, or if” products will be sold in the
California market.

You may receive inquiries from
customers about chemicals found in, or
produced by, some of our heating and
air-conditioning equipment, or found in
natural gas used with some of our
products. Listed below are those
chemicals and substances commonly
associated with similar equipment in
our industry and other manufacturers.

• Glass Wool (Fiberglass) Insulation

• Carbon Monoxide (CO)

• Formaldehyde

• Benzene

More details are available at the
Websites for OSHA (Occupational
Safety and Health Administration), at
www.osha.gov

and the State of
California's OEHHA (Office of
Environmental Health Hazard
Assessment), at www.oehha.org.
Consumer education is important since
the chemicals and substances on the
list are found in our daily lives. Most
consumers are aware that products
present safety and health risks, when
improperly used, handled and
maintained.

SAFETY RULES

WARNING

!

WARNING

!

4

HELPFUL INFORMATION

The following national standards will
help you in making this installation.
Current editions of these standards
should be obtained from:

American National Standards Institute
1430 Broadway
New York, NY 10018

National Electric Code
ANSI/NFPA No. 70

National Fire Protection Association,

Inc.
Batterymarch Park
Quincy, MA 02269

Installation of Oil Burning

Equipment

NFPA No. 31

Installation of Air Conditioning and

Ventilating Systems

NFPA No. 90A

Warm Air Heating and Air
Conditioning Systems
NFPA No. 90B

Standard for Chimneys, Fireplaces,
Vents, and Solid Fuel-Burning
Appliances NFPA No. 211

LOCATION REQUIREMENTS AND CONSIDERATIONS

GENERAL INFORMATION

FIGURE 1

DIMENSIONS AND
CLEARANCES TO COMBUSTIBLES

a0965

RETURN

AIR

TOP VIEW

SUPPLY

RIGHT SIDE VIEW

OPTIONAL RETURN

BOTTOM DETAIL

RETURN

FRONT VIEW

LEFT SIDE VIEW

MODEL

HEATING

CAPACITY

LEFT
SIDE

RIGHT

SIDE

BACK FRONT TOP F

FLUE

G

ABCDEF

DIMENSIONS REDUCED CLEARANCES (IN.)

-067 56.000
21 19

1

⁄2 46 5 181⁄2 333⁄4 11 1 8 348

67.200
84000

-112 95200 24

1

⁄2 23 46 5 22 333⁄4 11 1 8 348

112000

-150 134400
28 26

1

⁄2 49 7 251⁄2 361⁄4 11 1 8 348

151200

SUPPLY

AIR

5

TABLE 1

BLOWER PERFORMANCE DATA

TABLE 2

UPFLOW OIL FURNACE SPECIFICATIONS

MODEL

NUMBER

HEATING

CAPACITY

(BTU/H)

[KW]

BLOWER

SIZE

MOTORHPBLOWER

SPEED

CFM AIR DELIVER

E.S.P. INCHES WATER COLUMN

0.5 0.4 0.3 0.2

NOZZLE

SIZES

(GPH)

HEATING

SPEED

COOLING

SPEED

56000 HIGH 1140 1190 1230 1260

-067

[16.41KW]

10 X 7 1/4

MED-HIGH 15 940 955 970

0.5 MED-LOW HIGH

67200 MED-LOW 795 835 870 885

[19.69KW] LOW 600 620 635 645

0.65 MED-HIGH HIGH

84000

[24.62KW] HIGH 1500 1575 1645 1705

0.75 LOW HIGH

-112

95200

10 X 10 1/2

MED-HIGH 1375 1430 1480 1530

0.85 MED-LOW HIGH

[27.90KW] MED-LOW 1230 1260 1285 1300

112000 LOW 1040 1065 1080 1090

1.00 MED-HIGH HIGH

[32.83KW]

134400 HIGH 2070 2110 2145 2175

-150

[39.38KW]

11 X 10 3/4

MED-HIGH 1715 1745 1760 1770

1.20 MED-HIGH HIGH

151200 MED-LOW 1375 1400 1435 1450

[44.30KW] LOW 1045 1055 1070 1090

1.35 HIGH HIGH

MODEL

NUMBER

-067 -112 -150

56000 [16.41KW]

84000 [24.62KW]

134400 [39.38 KW]

HEATING CAPACITY (BTU/H) [KW] 95200 [27.90KW]

67200 [19.69KW]

112000 [32.83KW]

151200 [44.30KW]

BLOWER MOTOR DRIVE DIRECT DIRECT DIRECT

BLOWER DIA. x WIDTH 10 x 7 10 x 10 11 x 10

MOTOR H.P. (NO. OF SPEEDS) 1/4 (4) 1/2 (4) 3/4 (4)

WIDTH 21 24

1

⁄2 28

DEPTH 28

3

⁄4 283⁄4 283⁄4

HEIGHT 46 46 49

FILTER RACK RXGF- Z16B Z16B Z16B

HEATING EXT. STATIC PRESSURE 2 2 2

MAX. EXTERNAL STATIC PRESSURE .5 .5 .5

TEMPERATURE RISE RANGE F 40-70 50-80 60-90

BLOWER MOTOR FULL LOAD AMPS 5.7 8.7 11.0

TOTAL CURRENT 7.5 14.1 16.1

MINIMUM CIRCUIT AMPACITY 11.6 16.3 18.8

FLUE SIZE—DIA. 5" 5" 7"

AIR DELIVERY (HEATING/COOLING) 915/1140 1375/1500 1715/2070

AIR FILTER SIZE (QTY.) (1) 16 x 25 x 1 (1) 16 x 25 x 1 (1) 16 x 25 x 1

APPROX. SHIP WT. (LBS.) 160 198 207

6

TABLE 3

UPFLOW HEATING CAPACITY

FIGURE 2

TYPICAL RATING PLATE INFORMATION

SELECTING NOZZLE SIZE

All furnaces are capable of firing at
multiple rates (see Table 3). The
furnaces are shipped with the highest
heat output rate nozzle installed.
Smaller nozzles are included in the
parts bag, shipped with the furnace.
Select the appropriate nozzle by
determining the load requirements of
the house and comparing it to the Net
Input (see Table 3). If the load is
greater than the Net Input for the
nozzle, select the next highest nozzle
size. Use Table 1 to select the
appropriate flow speed for the nozzle
size selected.

NOZZLE CHANGES/INPUT RATE
DETERMINATION SHOULD ONLY
BE MADE BY A QUALIFIED
SERVICE TECHNICIAN.

CAUTION

!

FIGURE 3

THIS FURNACE WAS INSTALLED WITH
A NOZZLE HAVING A FIRING RATE OF
.50

GALLONS PER HOUR AND AN

INPUT RATING OF 70,000 BTUH.

92-100538-01A-00

THIS FURNACE WAS INSTALLED WITH
A NOZZLE HAVING A FIRING RATE OF
.60 GALLONS PER HOUR AND AN
INPUT RATING OF 84,000 BTUH.

92-100538-01B-00

THIS FURNACE WAS INSTALLED WITH
A NOZZLE HAVING A FIRING RATE OF
.75

GALLONS PER HOUR AND AN

INPUT RATING OF 105,000

BTUH.

92-100538-01C-00

THIS FURNACE WAS INSTALLED WITH
A NOZZLE HAVING A FIRING RATE OF
.85 GALLONS PER HOUR AND AN
INPUT RATING OF 119,000 BTUH.

92-100538-01D-00

THIS FURNACE WAS INSTALLED WITH
A NOZZLE HAVING A FIRING RATE OF

1.00 GALLONS PER HOUR AND AN
INPUT RATING OF 140,000 BTUH.

92-100538-01E-00

THIS FURNACE WAS INSTALLED WITH
A NOZZLE HAVING A FIRING RATE OF

1.20 GALLONS PER HOUR AND AN
INPUT RATING OF 168,000 BTUH.

92-100538-01F-00

THIS FURNACE WAS INSTALLED WITH
A NOZZLE HAVING A FIRING RATE OF

1.35

GALLONS PER HOUR AND AN

INPUT RATING OF 189,000 BTUH.

92-100538-01G-00

INSTRUCTIONS:

PEEL OFF APPROPRIATE LABEL AND APPLY
ADJACENT TO FURNACE RATING LABEL. FIRING
RATE AND INPUT RATING ON LABEL MUST
AGREE WITH THE ACTUAL FIRING RATE AND
INPUT RATING OF THE FURNACE AS INSTALLED.

DISCARD REMAINING LABELS.

92-100538-01-00

NOTE:

When installing the furnace, be sure to
mark the appropriate firing rate/nozzle
size on the rating label (see Figure 2)
by scratching the surface off of the
appropriate square. The appropriate
label from sheet 92-100538-01 (see
Figure 3) must also be applied near the
rating plate.

MODEL

NUMBER

DELAVAN

NOZZLE

SIZES

DEL-O-FLO

NOZZLE

SIZES

GROSS

INPUT

(BTUH)

NET

INPUT

(BTUH)

AFUE

(ISOLATED

COMBUSTION)

70,000 58,000 82.9%

-067 — (.50, .65) - 70°B
84,000 67,000 80.8%

105,000 86,100 82.0%

-112 (1.0) -70°B (.75, .85) - 70°B 119,000 96,900 81.4%

140,000 112,000 80.0%

-150 (1.2, 1.35) - 70°B —

168,000 136,000 81.0%

189,000 154,000 81.5%

7

REQUIREMENTS

IMPROPER INSTALLATION,
ADJUSTMENT, ALTERATION,
SERVICE OR MAINTENANCE CAN
CAUSE PROPERTY DAMAGE,
INJURY OR DEATH. CONSULT A
QUALIFIED INSTALLER OR
SERVICE AGENCY FOR SERVICE
AND ASSISTANCE.

The furnace should be installed in
accordance with the latest editions of
the NFPA 31 booklet, “Installation of
Oil Burning Equipment,” the NFPA 90B
booklet, “Warm Air Heating and Air
Conditioning Systems” the NFPA 90A
booklet, “Installation of Venting and Air
Conditioning Systems” and the NFPA
211 booklet “Standard for Chimneys,
Fireplaces, Vents, and Solid Fuel­Burning Appliances” published by the
National Fire Protection Association,
Batterymarch Park, Quincy, MA 02269.

THIS FURNACE IS DESIGN
CERTIFIED TO OPERATE ON #2
FUEL OIL. DO NOT ATTEMPT TO
CONVERT THIS FURNACE TO
BURN NATURAL GAS OR LP GAS.
FAILURE TO FOLLOW THIS
WARNING CAN CAUSE A FIRE OR
EXPLOSION RESULTING IN
PROPERTY DAMAGE, PERSONAL
INJURY OR DEATH.

LOCATION

THIS FURNACE IS NOT APPROVED
FOR INSTALLATION IN A MOBILE
HOME. DO NOT INSTALL THIS
FURNACE IN A MOBILE HOME.
INSTALLATION IN A MOBILE HOME
COULD CAUSE FIRE, PROPERTY
DAMAGE AND PERSONAL INJURY
OR DEATH.

Locate furnace as close to chimney as
practical, giving considerations to duct
trunk lines and accessibility of oil
burner, controls, blower and filter. For
basement installation, if there is no
level concrete floor or if water may be
encountered, a level concrete base
should be provided. Allow a minimum
of twenty-four inches at front of furnace
for servicing oil burner and controls.
Fire protection clearances are printed
in figure 1 and on the rating plate of the
furnace.

An oil-fired furnace installed in a
residential garage must be located or
protected to avoid physical damage by
vehicles.

This furnace is approved for installation
indoors only. Do not install unit
outdoors.

COMBUSTIBLE MATERIAL MUST
NOT BE PLACED ON OR AGAINST
THE FURNACE JACKET. THE AREA
AROUND THE FURNACE MUST BE
KEPT CLEAR AND FREE OF ALL
COMBUSTIBLE MATERIAL
INCLUDING GASOLINE AND OTHER
FLAMMABLE VAPOR OR LIQUIDS.
THE HOMEOWNER SHOULD BE
CAUTIONED THAT THE FURNACE
AREA MUST NOT BE USED AS A
BROOM CLOSET OR FOR ANY
OTHER STORAGE PURPOSES.
COMBUSTIBLE MATERIAL PLACED
AGAINST FURNACE JACKET COULD
CAUSE FIRE, PROPERTY DAMAGE,
PERSONAL INJURY OR DEATH.

COMBUSTION AIR SUPPLY

THIS FURNACE MUST BE PROVIDED
WITH ENOUGH FRESH AIR FOR
PROPER COMBUSTION AND
VENTILATION OF FLUE GASES.
SOME HOMES MAY REQUIRE THAT
OUTSIDE AIR BE SUPPLIED TO THE
FURNACE AREA. FAILURE TO
PROVIDE ENOUGH FRESH AIR CAN
CAUSE DEATH FROM CARBON
MONOXIDE POISONING.

Adequate facilities for combustion and
ventilation must be provided in
accordance with section number 1-5,
“Air for Combustion and Ventilation,” of
the

Standard for Installation of Oil

Burning Equipment, NFPA No. 31

, latest
edition or other applicable provisions of
local building codes. The flow of com­bustion air to the furnace area must not
be obstructed.

Important: Air for combustion and
ventilation must not come from a
corrosive atmosphere. Any failure due
to corrosive elements in the atmosphere
is excluded from warranty coverage.
Combustion air must be free of acid­forming chemicals such as sulphur,
fluorine and chlorine. These elements
are found in aerosol sprays, detergents,
bleaches, cleaning solvents, air
fresheners, paint and varnish removers,
refrigerants and many other commercial
and household products. Vapors from
these products when burned in a flame
form acidic compounds and are highly
corrosive when they condense.

When appliances are installed within a
confined space and combustion air is
taken from within the heated space, the
air supply must be through two
permanent openings of equal area, one
located within 12 inches of the ceiling
and one within 12 inches of the floor
(see figure 4). Refer to the rating plate
label on the furnace for information on
the minimum free area of these two
openings.

When appliances are installed in an
unconfined space in a building of con­ventional frame, brick or stone
construction, infiltration normally is
adequate to provide for combustion
ventilation and draft control dilution. If
the unconfined space is within a
building of unusually tight construction,
a supply of combustion, ventilation and
draft control dilution air must be
obtained from outdoors or spaces freely
connected to the outdoors. Under these
conditions a permanent opening or
openings having a total free area of not
less than 1 sq. in. per 5,000 BTUH of
total input rating of all appliances shall
be provided. This code is found in

NFPA 31, Standard for Installation of
Oil Burning Equipment

. Other State,
Provincial, and Local codes may apply,
check with local inspectors.

When appliances are installed in a
confined space within a building of
unusually tight construction, air for
combustion must be obtained from
outdoors or from spaces or ducts freely
drawing from the outdoors. Under these

INSTALLATION INSTRUCTIONS

WARNING

!

WARNING

!

WARNING

!

WARNING

!

FIGURE 4

OPENINGS FOR CONFINED SPACES

WARNING

!

8

conditions, two openings of
approximately equal area (one located
near the top and one located near the
bottom of the enclosure) must be
provided each with a total free area of not
less than 1 square inch per 4,000 BTU’s /
Hr. of total input rating of all appliances in
the enclosure (see figure 5).

If horizontal ducts are used, each
opening shall have a free area of not
less than 1 sq. in. per 2,000 BTUH of
total input of all appliances in the
enclosure (see figure 6).

Appliances installed in confined
spaces may be installed with ventilation
air from inside the building and
combustion air from outdoors. Consult
state and local codes and the

NFPA
No. 31, Standard for Installation of Oil
Burning Equipment

for specific details

(see figure 7 for an example).

Appliances installed in confined
spaces with all required air coming
from the outdoors may also get inlet
air from continuously ventilated crawl
spaces and outlet air to a ventilated
attic (see figure 8).

"NFPA 31, Standard for Installation of
Oil Burning Equipment"

defines
"confined space" and "unconfined
space" as follows.

Confined Space - Any space whose
volume is less than 50 cu. ft. per 1,000
BTUH of the aggregate input rating of
all fuel-burning appliances installed
therein.

Unconfined Space - Any space whose
volume is equal to or greater than 50
cu. ft. per 1,000 BTUH of the aggregate
input rating of all fuel-burning
appliances installed therein. Rooms
connecting directly with the space in
which the appliances are located by
means of openings that have no doors

or closures, unless fully louvered, shall
be considered part of the unconfined
space.

When determining if the furnace is
located in a confined or unconfined
space it is important to realize that
some buildings are so tight that normal
infiltration does not meet air
requirements for proper combustion or
venting and outside air must be
introduced.

Important: All applicable codes must
be followed when providing air to the
confined space.

FIGURE 5

ALL AIR FROM VENTILATED ATTIC

FIGURE 6

DIRECTLY CONNECTING HORIZONTAL
DUCTS TO OUTDOORS

FIGURE 7

INSIDE VENTILATION AIR, OUTSIDE
COMBUSTION AIR

FIGURE 8

OUTSIDE AIR FROM ATTIC AND CRAWL SPACE

9

CIRCULATING AIR SUPPLY

Plenum chambers and air ducts must
be installed in accordance with the
Standard for the Installation of Air
Conditioning and Ventilating Systems,
NFPA No. 90A, or the Standard for the
Installation of Warm Air Heating and
Air Conditioning Systems, NFPA No.
90B.

The circulating air supply may be
taken: (1) exclusively from return air
ducts from several rooms, or (2)
combined with outside air. When
outside air is utilized, the system
should be designed and adjusted such
that the temperature of the combined
return air to the furnace will not be
below 50°F during the heating season.
When using a combination of outside
air and return air, be sure the ducts are
so designed and a diverting damper so
installed that the volume of circulating
air entering the furnace cannot be
reduced or restricted below that which
would normally enter through the
circulating air intake of the furnace.

When the furnace is installed so that
the supply ducts carry air circulated by
the furnace to areas outside the space
containing the furnace, the return air
shall be handled by a duct or ducts
sealed to the furnace casing and
terminated outside the space
containing the furnace.

IF THERE IS NO COMPLETE
RETURN AIR DUCT SYSTEM, THE
RETURN AIR CONNECTION MUST
RUN FULL SIZE TO A LOCATION
OUTSIDE THE UTILITY ROOM OR
SPACE HOUSING THE FURNACE
TO PREVENT A NEGATIVE
PRESSURE ON THE VENTING
SYSTEMS. A NEGATIVE PRESSURE
CAN DRAW PRODUCTS OF
COMBUSTION INTO CIRCULATING
AIR.

NEVER ALLOW THE PRODUCTS OF
COMBUSTION OR THE FLUE
PRODUCTS TO ENTER THE RETURN
AIR DUCTWORK OR THE
CIRCULATING AIR SUPPLY. ALL
RETURN DUCTWORK MUST BE
ADEQUATELY SEALED AND
SECURED TO THE FURNACE WITH
SHEET METAL SCREWS, AND
JOINTS TAPED. ALL OTHER DUCT
JOINTS MUST BE SECURED WITH
APPROVED CONNECTIONS AND
SEALED AIRTIGHT.

FAILURE TO PREVENT PRODUCTS
OF COMBUSTION FROM BEING
CIRCULATED INTO THE LIVING
SPACE CAN CREATE SOOT
DAMAGE, SMOKE, ODORS OR
CARBON MONOXIDE POISONING.

IMPORTANT: One of the most

common causes of trouble in forced air
heating systems is insufficient return
air to the furnace. The return air
system should be approximately equal
to or greater than the area of the warm
air discharge. CONSULT LOCAL
CODES FOR SPECIAL
REQUIREMENTS.

DO NOT, UNDER ANY
CIRCUMSTANCES, CONNECT
RETURN OR SUPPLY DUCTWORK
TO OR FROM ANY OTHER HEAT
PRODUCING DEVICE SUCH AS A
FIREPLACE INSERT, STOVE, ETC.
DOING SO MAY RESULT IN FIRE,
CARBON MONOXIDE POISONING,
EXPLOSION, PERSONAL INJURY,
PROPERTY DAMAGE OR DEATH.

Install the cold air return to terminate
through the floor under the furnace. A
direct connection should be made to
the bottom of the furnace. For
installations where return air ducts
cannot be run under the floor, return air
may be taken from the sides by cutting
the furnace casing and installing the
appropriate accessory.

NOTE: Where the maximum air flow is
1800 CFM or more, both sides or the
bottom must be used for return air.

When a cooling coil is used in
conjunction with the furnace, it must be
installed downstream of the outlet end
of the furnace (supply-air side) or in
parallel with the furnace to avoid
condensation in the heat exchanger.

If the furnace is installed in parallel with
a cooling unit, the damper or other
means used to control the flow of air
must be adequate to prevent chilled air
from entering the furnace, and if
manually operated must be equipped
with means to prevent operation of the
other unit unless the damper is in the
full heat or cool position.

IMPORTANT: Air openings in the
casing front, return air grilles and warm
air registers must not be obstructed.

BLOWER AND BURNERS MUST
NEVER BE OPERATED WITHOUT
BLOWER DOOR IN PLACE. THIS IS
TO PREVENT DRAWING FUMES
(WHICH COULD CONTAIN
ANNOYING AND HAZARDOUS
GASES) INTO THE HOME THAT
COULD RESULT IN PERSONAL
INJURY OR DEATH.

FLUE AND CHIMNEY
EXHAUST

The vent connector should be as short
as possible and installed so that it has
a continuous rise from the furnace to
the chimney or flue.

The number of elbows should be
minimized and the flue pipe should be
joined with sheet metal screw and
properly supported with suitable pipe
hangers.

A barometric draft regulator is required
in each furnace vent connector and
must be installed before the vent
connector enters the chimney or flue.

NOTE: The size of the draft regulator
diameter must be no smaller than the
vent connector diameter.

The vent connector should be the
same size as the furnace flue pipe
connection. The sizes are:

CHIMNEY SIZE
RECOMMENDATIONS

The following table shows
recommended size and height for
chimneys based on total BTU input of
all the oil appliances being vented:

VENTING

Unit must be vented through a chimney
or flue. Check chimney for soot, leaks,
obstruction and proper height to
prevent down draft. Clean chimney and
base if necessary.

The height of the chimney or flue shall
be at least 3 feet above the highest
point where it passes through the roof
of a building and at least 2 feet higher
than any portion of a building within 10
feet of such chimney.

WARNING

!

WARNING

!

WARNING

!

TABLE 5

GROSS BTU RECTANGULAR ROUND MINIMUM

INPUT TILE TILE HEIGHT

(INCHES) (INCHES) (FEET)

144,000 8

1

/2 x 81/2 820

235,000 8

1

/2 x 13 10 30
372,000 13 x 13 12 35
516,000 13 x 18 14 40
612,000 — 15 45
768,000 18 x 18 — 50
960,000 20 x 20 18 55

BTU OUTPUT FLUE SIZE

056
067
084
095
112
130
150

5”
5”
5”
5”
5”
7”
7”

TABLE 4

10

Install a single wall, vent connector
from flue outlet to chimney, sloping flue
pipe continuously upward (at least 1/4
inch per foot) toward chimney. The
vent connector should be the same
diameter as the flue collar of the
furnace for the entire length of run and
should not exceed 10 feet in length.
Avoid sharp turns that would create
resistance to the flow of flue gasses.
Vent connector should not extend
beyond the inside wall of the chimney
and must be firmly cemented to
masonry.

IMPORTANT: For horizontally vented
applications, use the Tjernlund SS1-R
power vent (date code of ??? or later)
installed to the manufacturer’s
installation instructions.

No other appliances or heating
equipment should be connected to the
vent connector servicing the furnace.

Bolt, screw and/or support joints to
avoid sag. Fasten the single-wall vent
connector to the outlet collar of the
furnace with at least two sheet metal
screws. Refer to Figure 1 for distances
to combustible materials.

DEVICES ATTACHED TO THE FLUE
OR VENT FOR THE PURPOSE OF
REDUCING HEAT LOSS UP THE
CHIMNEY HAVE NOT BEEN TESTED
AND HAVE NOT BEEN INCLUDED IN
THE DESIGN CERTIFICATION OF
THIS FURNACE. WE, THE
MANUFACTURER, CANNOT AND
WILL NOT BE RESPONSIBLE FOR

OIL BURNER / PRIMARY
CONTROL

Oil burner and primary control are
mounted to the furnace as a single
assembly. Standard equipment
consists of the oil burner, ignition
transformer, and flame sensor
(cadmium sulfide cell) with primary
control and low voltage transformer all
included on the burner assembly.

The standard oil burner is equipped
with a single stage fuel pump.

This
single stage fuel pump may be used in
either a one or two pipe system. If a
two pipe system is required (burner is
above tank) the lift and length of run
must be considered so as not to
overload the fuel unit. NOTE: If the
length of run and the lift is beyond the
recommended limits of the charts
below, a booster prep unit should be
used.

INJURY OR DAMAGE CAUSED BY
THE USE OF SUCH UNTESTED
AND/OR UNCERTIFIED DEVICES,
ACCESSORIES OR COMPONENTS.

BAROMETRIC DRAFT
CONTROL

The barometric damper (see figure 9) is
a control installed in the flue pipe to
regulate the draft in the furnace. If the
draft increases in the chimney, the
damper opens to maintain the preset
draft in the furnace. Should the draft
decrease in the chimney, the damper
will close to maintain the preset draft of
the oil furnace. A barometric damper is
supplied with each furnace and must be
installed by the following the
instructions supplied by the
manufacturer. The barometric damper
control should be installed between the
flue outlet of the furnace and the
chimney (see figure 10). The
barometric damper control should be
set for proper draft on start up after the
furnace has been operating for 10 to 15
minutes. See Oil Burner Adjustment
Procedure Section for proper draft
settings.

On start up, the furnace must be set
for field conditions with a
combustion kit for proper operation.
NOTE: Always use a separate

barometric damper for each oil-fired
appliance. Install the barometric
damper with its hinge level and the face
plumb. Tilting causes erratic damper
operation. Installation of a barometric
damper must be in accordance with the
Installation and Operation Instructions
provided with the damper.

The following standards and codes will
help to make the installation. Current
editions of these standards can be
obtained from:

American National Standards Institute,
1430 Broadway, New York, NY 10018

Metal Thickness for

Galvanized Steel Pipe Connectors

Diameter of Galvanized Minimum

Connector Sheet Thickness

(in.) (mm) Gauge No. (in.) (mm)

< 6 < 152 26 0.019 0.48

≥ 6 to ≤ 10 ≥ 152 to ≤ 254 24 0.024 0.61

> 10 to ≤ 16 > 254 to ≤ 406 22 0.029 0.74

>16 > 406 16 0.056 1.42

FIGURE 10

RECOMMENDED BAROMETRIC DAMPER LOCATIONS

FIGURE 9

BAROMETRIC DAMPER

WARNING

!

Lift (in feet) 0 1 2 3 4 5 6 7 8 9 10

3/8" O.D.

53 40 45 41 38 33 20 25 21 18 13

Tubing

1/2" O.D.

100 100 100 100 100 100 100 99 83 68 52

Tubing

Recommended Maximum Length of Tubing

Used on a Single Stage (3450 RPM) Pump Two

Pipe System