L83UFV Installation Manual

L83UFV Installation Manual
INSTALLATION INSTRUCTIONS
Models: LUF, LBF, LBR, LHF, & LHR
Variable Speed Oil-Fired Furnaces
WARNING
Improper installation, adjustment, alteration, service, or maintenance can cause injury or
property damage. Refer to this manual. For assistance or additional information, consult
a qualified installer or service agency.
WARNING
Do not store combustible materials, including
gasoline and other flammable vapors and
liquids, near the furnace, vent pipe, or warm air
ducts. The homeowner should be cautioned that
the furnace area must not be used as a broom
closet or for any other storage purposes. Such
uses may result in actions that could cause
property damage, personal injury, or death.
TABLE OF CONTENTS
START-UP CHECKLIST ......................... 2
INSTALLATION ...................................... 3
Location ....................................... 3
Clearances .................................. 3
Venting ........................................ 6
Filters ........................................... 9
Variable Speed Features ........... 10
START-UP ............................................ 12
CAUTION
Never burn garbage or paper in the heating
system and never leave rags, paper, or any
flammable items around the unit.
OPERATION ........................................ 13
MAINTENANCE AND SERVICE .......... 15
WIRING DIAGRAM .............................. 16
Manufactured By
Allied Air Enterprises Inc.
A Lennox International Inc. Company
215 Metropolitan Drive
West Columbia, SC 29170
WARNING
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 result in actions that could cause property damage, personal injury, or death.
*48288J005*
CAUTION
The installation of the furnace, wiring, warm air ducts, venting, etc. must conform to the requirements of the
National Fire Protection Association Standard for the Installation of Oil Burning Equipment, NFPA No. 31; the
National Electrical Code, ANSI/NFPA No. 70 (in the USA); the Installation Code for Oil Burning Equipment,
CSA Standard CAN/CSA B139 (in Canada); the Canadian Electrical Code Part 1, CSA 22.1; the Recommendations of the National Environmental Systems Contractors Association; and any state or provincial laws or
local ordinances. Local authorities having jurisdiction should be consulted before installation is made. Such
applicable regulations or requirements take precedence over the general instructions in this manual.
# 48288J005
Save these instructions for future reference
Page 1
OIL FURNACE START-UP CHECKLIST
(Complete this page and keep for future reference)
Customer Name ________________________________________________________________________________
Address ______________________________________________________________________________________
City __________________________________________ State ________________ Zip Code __________________
Furnace Model # ____________________________________________________ Serial # ___________________
Input Rate __________________________________________________________ Nozzle Used _______________
New Construction ___________________________________________________ Replacement ______________
Date of Installation _____________________________
Start-Up Procedure
Installation Data
Furnace Location:
A. Basement – Open ______ Enclosed* ______
B. Utility room – Open ______ Enclosed* ______
C. Closet – Open _________ Enclosed* ______
D. Crawl space – Open _____ Enclosed* ______
* Provisions must be made for adequate air for combustion. See Combustion and Ventilation Air on page 6.
Chimney Data:
A. Inside ________ Outside ________
B. Brick or Masonry _______
C. Lined _________ Size: __________
D. Type: Class A all-purpose _________ Type L _______
E. Condition _____________________
Flue Pipe:
A. Distance to chimney __________ Pitch _________
B. Diameter ___________________
C. Barometric damper installed ________
D. Drill 5/16" hole in flue pipe 12" upstream of barometric
damper ________
E. Obtain drafting reading; adjust barometric ________
Oil Tank Data:
A. Installed in basement __________
B. Outside __________
C. Buried/Depth: ______________
D. Size: _________ gallons
E. Age: _____________________
F. Date of last cleaning: _______________
A. Close disconnect switch _______
B. Set thermostat to call for heat _______
C. Bleed air from lines and pump; run for 20 seconds
after bubble disappears _______
D. Install vacuum gauge; check pump vacuum ______
E. Install pressure gauge; adjust pressure to 140 psig
(except on 57 models – adjust to 100 psig) _____
Always verify proper pump pressure to corresponding
tables with instructions supplied with unit.
F. After 10 minutes of operation, obtain flue temperature
reading: 1st ___________ 2nd _____________ 3rd _____________
G. Obtain smoke reading:
1st ____________ 2nd ______________ 3rd ____________
H. Measure CO2: 1st __________ 2nd ____________ 3rd __________
I. Check draft overfire _______ Breech _______
J. Air shutter setting __________ Locked _______
K. Measure static pressure in duct system
Static pressure on supply side _______
Static pressure on return side ________
Static pressure drop _______
L. Temperature rise after steady state conditions have
been achieved: Supply side ____ Return side ____
M. Block off return air (limit control checkout); burner
should shut down in 2 or 3 minutes _______
Owner Record
Installed By: __________________________________
Oil Lines:
A. Size: 3/8" ______ 1/2" ______ Other _____
B. Single pipe _______ Two pipe _______
C. Distance from tank _______ Lift _______
D. Filter type __________ Inspect ____ Change ____
E. Pressure test ________
F. Recheck all fittings for tightness ________
Dealer
Thermostat
A. Type: Heating ______
B. Anticipator set ______
C. Wires: New ________
License # ____________________________________
Air Filter
A. Type: Permanent ___
B. Installed __________
C. Size: _____________
Page 2
____________________________________
Address ____________________________________
____________________________________
____________________________________
Telephone # __________________________________
Cooling ______
Old _________
Disposable ____
Manufactured By
Allied Air Enterprises Inc.
A Lennox International Inc. Company
215 Metropolitan Drive
West Columbia, SC 29170
These checks or tests are required for all oil units.
# 48288J005
INSTALLATION
Position the furnace so the pipe connection to the chimney
will be of minimum distance and have a minimum of fittings.
Read all instructions before starting work so installation
will conform to Underwriters’ Laboratories or Canadian
Standards Association requirements. The furnace must be
level when placed on its foundation (upflow, counterflow,
and basement models) or in its suspended position
(horizontal models). Using a carpenter’s level, check the
furnace in at least two directions. The weight must be
distributed evenly before the duct work is attached.
These instructions must be placed on or near the
furnace in a conspicuous place.
Inspection of Shipment
This furnace is shipped in one package, completely
assembled and wired. The thermostat is shipped in a
separate carton when ordered.
In utility rooms or similar installations, the door or access
opening should be large enough to permit replacement of
the furnace, or another appliance such as a water heater,
without disturbing any other equipment.
WARNING
In any installation where damage from oil
may occur, a drain pan must be installed.
The drain pan must be large enough size to
completely prevent any potential oil damage.
The drain pan piping must be sized to drain
the oil pump capacity and the piping must be
routed to drain the oil back to the oil tank.
Upon receipt of equipment, carefully inspect it for possible
shipping damage. If damage is found, it should be noted
on the carrier’s freight bill. Damage claims should be filed
with the carrier immediately. Claims of shortages should
be filed with the seller within 5 days.
For attic installations, a booster oil pump may be required
to supply oil to the oil burner. Check state and local codes
for specific requirements.
Location
A minimum of 24" is recommended in front of the furnace
for servicing the burner on all models.
Locate the furnace as centrally as possible so that all warm
pipes to the various rooms are nearly the same length. This
allows each room to receive an equal and proper amount of
heat. This may vary with each particular installation.
Clearances
See Table 1 for a complete listing of the minimum clearances required for basement type and upflow installations.
See Figure 2 on page 4 for the minimum clearances
Minimum Clearances to Combustibles – Upflow Installations
*
Basement Type Units
Hi-Boy (Upflow)
LBF & LBR
LUF
57/72 - 84/95
112/125
57/72 - 84/95
112/125
Top of Plenum and Duct Work
2"
2"
2"
2"
Plenum Sides
3"
3"
3"
3"
Furnace Sides
6"*
6"*
0"
0"
Furnace Rear
24"
24"
0"
0"
From Front Door
4"
4"
4"
4"
Flue Pipe Clearance to Combustibles**
9"
9"
6"
6"
Type of Floor
Comb.
Comb.
Comb.
Comb.
Combustion Air Openings (2 req'd)
10" x 20"
11" x 22"
10" x 20"
11" x 22"
A passage, suitable for a large person, shall be provided between the furnace and chimney for inspection or replacement of
the flue connector when necessary. A clearance of 24" shall be allowed at the rear and on one side of the furnace for service
and cleaning of the blower.
** The minimum clearance shown to the flue pipe may be reduced by using special protection permitted by local building
codes and National Fire Protection Association Standards and CSA 139.
# 48288J005
Table 1
Page 3
required for horizontal installations and Figure 3 for the
minimum clearances required for counterflow installations.
When accessibility clearances are greater than fire
protection clearances, the accessibility clearances
take precedence.
Horizontal Installation
LHF/LHR Models
Top View
E
Non-Suspended Horizontal Installation
To support the furnace from below, set furnace on noncombustible material suitable to support the weight of the unit.
Using a carpenter’s level, check the furnace in at least two
directions. To make adjustments, use shims of noncombustible material. Seven inches minimum clearance between
the bottom of the flue pipe and combustible material is
required. Installation on a combustible floor requires a 1"
clearance from the floor.
Supply
Return
F
G
B
A
Suspended Horizontal Installation
Supply
Before suspending the furnace, remove the knockouts in the
top of the panel at the warm air discharge and at the blower
panel. Use 3/8" threaded rods cut to the desired length. Use
one flat washer and two nuts on each rod. Place one nut and
one flat washer on the inside of the unit and one nut on the
outside (see Figure 1). The outside nut serves as the locking
nut. Level the unit using the inside nuts.
Hanger Rod Installation
Rod
Nut
Top of
Furnace
Washer
Nut
Return
C
Front View
D
C
Minimum Clearances - Horizontal Installations
A
Top
84 - 125
Front Flue
84 - 125
Rear Flue
1"
4"
B
Duct
1"
6"
C
Sides
1"
6"
D
Bottom
1"
4"
E
Rear
1"
24"
F
Front
24"
24"
G
Flue
7"
9"
Figure 2
Figure 1
Horizontal Installation Reversing the Air Flow
This furnace is assembled to discharge warm air out the
left side (when viewed facing the burner side of the
furnace). If installation requires that the flow be reversed:
1. Rotate the furnace 180° so that the warm air is discharged out the right side.
2. Remove the oil burner and the screws securing the
burner mounting plate. Rotate the burner mounting
plate 180° and reattach with screws. Remount the
burner in the upright position.
3. Remove the screws holding the limit control in place.
Relocate the limit control to the top side of the front
panel using the knockout hole provided.
Page 4
Counterflow Installation
This furnace is assembled to discharge warm air out the
left side (when viewed facing the burner side of the
furnace). To convert to counterflow:
1. Rotate the furnace so the return is on top and the
supply is on bottom.
2. Remove the oil burner and the screws securing the
burner mounting plate. Rotate the burner mounting
plate 90° clockwise and reattach the screws into the
heat exchanger. Remount the burner.
3. Refer to Figure 3 for minimum clearances required.
When installing a counterflow unit on combustible
flooring, a combustible floor base must be used. See
Figure 4 for more information on using a combustible floor
base kit.
# 48288J005
Counterflow (Closet Installation)
LHF/LHR Models
Combustible Floor Installation –
LHF/LHR Models
Counterflow Installations
Cold Air
Duct
Blower
Comparment
Minimum Clearances
Counterflow Installations
Burner
A
Sides
1"
B
Return Plenum Top
0
C
Supply Plenum Side
1"
D
Return Plenum Side
0
E
Supply Plenum Bottom
1"
F
Front
16"
G
Rear
1"
H
Flue
1"*
J
Top
0
* The minimum clearance shown to the flue pipe
may be reduced by using special protection
permitted by local building codes and National Fire
Protection Association Standards and CSA 139.
A minimum of 24" must be provided in the front of the
furnace for servicing the burner and filter. A passage
suitable for a large person shall be provided between
the furnace and chimney for inspection or replacement of the flue connector when necessary.
Figure 3
Kits are also available for counterflow applications where
a vestibule cover is needed for safety reasons.
Vestibule cover kits:
Kit for 57/72 & 84/95 counterflow models – AVEST547-1
Kit for 112/125 counterflow models – AVEST548-1
It is very important that the furnace be exactly level
since a level unit is necessary for proper fitting of
parts. Using a carpenter’s level, check the furnace in
# 48288J005
Combustible
Floor Base
Sub-base
Insulation
Slab Flooring
(12" minimum)
Joist
Warm Air Plenum
Model
Size
(Downflow)
Cold Air
Duct
Size
Warm Air
Plenum
Size
Floor
Hole Size
(Wood)
Floor
Hole Size
(Slab)
Combustible
Floor Base
Kit Number
57/72
84/95
18-1/4" x
18-1/4"
18-1/4" x
18-1/4"
19" x 19"
18-1/2" x
18-1/2"
ABASE 537-1
112/125
21-1/4" x
21-1/4"
21-1/4" x
21-1/4"
22" x 22"
21-1/2" x
21-1/2"
ABASE 538-1
Figure 4
at least two directions. If the furnace is not level,
place fireproof wedges or shims between the low side
of the furnace and the floor and check again with the
level. The weight of the unit must be distributed
evenly on all four corners.
Air Conditioning
WARNING
When an air conditioning unit is used in conjunction with the furnace, the evaporator coil must be
installed in the discharge (supply) air. Do not
install an evaporator coil in the return air; excessive condensation will occur within the furnace.
Page 5
Combustion and Ventilation Air
Adequate provisions for combustion air, ventilation of
furnace, and dilution of the gases must be made.
If the furnace is installed in a confined space and combustion air is taken from the heated space, the supply air and
ventilating air must be through two permanent openings of
equal area. A confined space is “a space whose volume is
less than 50 cubic feet per 1000 BTU per hour of the
combined input rating of all appliances installed in that
space.” One opening must be within 12" of the ceiling and
the other within 12" of the floor. Each opening must have a
minimum free area of at least 1 square inch per 1000 BTU
per hour of total input rating of all appliances within the
space but not less than 100 square inches.
If the furnace is installed in a space within a building of
tight construction, air must be supplied from outdoors. In
this case, one opening shall be within 12" of the ceiling
and the other within 12" of the floor. If vertical combustion
ducts are run, each opening must have a free area of at
least 1 square inch per 4000 BTU per hour. If horizontal
combustion ducts are run, 1 square inch per 2000 BTU
per hour of the total input of all appliances is required.
As supplied, the furnace is designed to use air inside the
dwelling for combustion. If additional combustion air is
required, installing fresh air kit ABOOT571 allows air from
outside the dwelling to be brought in to the oil burner. This kit
brings air into the burner through air inlet ductwork run
through the furnace cabinet side panel and terminated
outside the dwelling (see Figure 5). The kit includes a
vacuum relief valve to guard against combustion problems
associated with directly connecting oil burners to the outside.
WARNING
Combustion air openings in the front of the
furnace must be kept free of obstructions. Any
obstruction will cause improper burner operation and may result in a fire hazard or injury.
WARNING
The barometric control shall be in the same
atmospheric pressure zone as the combustion
air inlet to the furnace. Deviation from this
practice will cause improper burner operation
and may result in a fire hazard or injury.
Circulating Air Supply
A return air duct system is recommended. Where there is no
complete return air duct system, a return connection should
be run full size to a location outside the confined space and
completely sealed so that no air from the confined space can
be circulated through the heating duct system.
Outdoor Make Up Air
A minimum mixed return air temperature of 60 – 65°F
must be maintained for outdoor make up air to prevent
condensation and corrosion.
Venting
Chimney
Fresh Air Kit ABOOT571 Installation
To Vent System
Intake
Air
Hood
Draft Control
Flue
Field Supplied
4” Piping
Furnace
Cabinet
Beckett
AFG Series
Burner
Mounts Through
Furnace Cabinet
Furnace Boot™
IMPORTANT: No more than 10' of vertical piping allowed
without weight support.
Figure 5
Page 6
Before installing the furnace, a thorough inspection of the
chimney should be made to determine whether repairs are
necessary and that the chimney is of the proper size and
constructed in accordance with the requirements of the
National Board of Fire Underwriters or Canadian Standards
Association. The smallest dimension of the chimney should
be at least equal to the diameter of the flue pipe of the
furnace. Be sure the chimney will produce a steady draft
sufficient to remove all the products of combustion from the
furnace. A fabricated vent system the same size as the flue
outlet of the furnace may also be used. If a manufactured
vent is used, it must be listed for use with oil-fired equipment.
Vertical Venting
WARNING
This furnace is certified for use with Type “L”
vent, Type “A”, and “factory-built” chimneys. “B”
vent must not be used with oil furnaces.
# 48288J005
1. Local building codes may have more stringent installation requirements and should be consulted before
installation of the unit.
2.
The flue pipe should be as short as possible to do the job.
Factory-Built Chimney
Barometric Control
(in either location)*
Factory-Built
Chimney
3. The flue pipe should not be smaller than the outlet
diameter of the flue outlet of the furnace.
4. Single wall flue pipe should not run outside or through
any unconditioned space.
Drain for
Condensate
5. The chimney should terminate 2' above the highest
peak of a peaked roof, and 3' higher than a flat roof.
6.
The flue pipe must not pass through a floor or ceiling.
Clearances to single wall flue pipe should be no less than
specified in the Clearances section beginning on page 3.
7. The flue pipe may pass through a wall where provisions have been made for a thimble as specified in
the Standards of the National Board of Fire Underwriters (see Figure 6).
Front Flue
Barometric Control
(in either location)*
Factory-Built
Chimney
Wall Thimble
Thimble
Drain for
Condensate
Rear Flue
Flue Pipe
Combustible Wall
Figure 6
8. The flue pipe should slope upward toward the chimney
on a horizontal run of at least 1/4" per foot and should
be supported by something other than the furnace (see
Figure 7 on this page and Figure 8 on page 8).
* Barometric control may be installed in either the
vertical or horizontal section of the flue pipe within
18" of the flue outlet of the furnace.
Figure 7
12. The flue pipe shall not be connected to a chimney
flue serving a solid fuel appliance or any mechanical
draft system.
13. All unused chimney openings should be closed.
9. Extend the flue pipe into the chimney so that it is flush
with the inside of the flue liner. Seal the joint between
the pipe and the liner.
14. All vent pipe run through unconditioned areas or
outside shall be constructed of factory-built chimney
sections (see Figure 7).
10. The furnace shall be connected to a factory-built
chimney or vent complying with a recognized standard,
or a masonry or concrete chimney lined with a lining
material acceptable to the authority having jurisdiction.
15. Where condensation of flue gases is apparent, the vent
shall be constructed to prevent the condensation from
entering the flue transition box opening. Provisions shall
be made to drain off the condensate (see Figure 7).
11. When two or more appliances vent into a common
flue, the area of the common flue should not be less
than the area of the largest flue or vent connection
plus 50% of the areas of the additional vents or flue
connections. The chimney must be able to sufficiently
vent all appliances operating at the same time.
16. Vent connectors serving this appliance shall not be
connected into any portion of a mechanical draft
system operating under positive pressure.
# 48288J005
17. Keep the area around the vent terminal free of snow,
ice, and debris.
Page 7
Horizontal Venting
Masonry Chimney
Barometric Control
(in either location)*
Liner
Cleanout
Barometric
Control*
Control for
Horizontal
Venting
Masonry
Chimney
Cleanout
Front Flue
Front Flue
Barometric Control
(in either location)*
Liner
Barometric
Control*
Cleanout
Control for
Horizontal
Venting
Masonry
Chimney
Cleanout
Rear Flue
* Barometric control must be installed in the horizontal venting system and located within 18" of the flue
outlet of the furnace.
Rear Flue
* Barometric control may be installed in either the
vertical or horizontal section of the flue pipe within
18" of the flue outlet of the furnace.
Do not common vent with any other appliance when using
the sidewall system.
Figure 8
Horizontal Venting
The design of this furnace has been approved for horizontal venting with the following mechanical vent systems:
Manufacturer
Model
Tjernlund (sideshot)
SS1, SSC, SS2
Field Control
SWGII-5-SS
with CK61 Control Kit
Refer to the manufacturer’s installation instructions for
proper installation procedures and service parts information.
Vent systems are available through the local distributor.
Barometric draft control must be used in the horizontal
venting (sidewall) system. It must be located within 18" of
the furnace flue outlet (see Figure 9).
Page 8
Figure 9
Maximum permissible vent length is 100 equivalent feet,
and minimum permissible length is 15 equivalent feet.
Calculate the equivalent vent pipe footage from the
furnace to the mechanical vent system by adding the
straight vent pipe length and equivalent elbow lengths
together. Each 90° elbow is equivalent to 10' of straight
pipe; each 45° elbow is equal to 5' of straight pipe.
Removal of Unit from Common Venting System
When an existing furnace is removed from a common
venting system serving other appliances, the venting system
is likely to be too large to properly vent the remaining
attached appliances. The following test should be conducted
with each appliance while the other appliances connected to
the common venting system are not in operation.
1. Seal any unused openings in the common venting
system.
# 48288J005
2. Visually inspect the venting system for proper size
and horizontal pitch and determine there is no blockage or restriction, leakage, corrosion, or other deficiencies which could cause an unsafe condition.
Draft Control Installation
Flue Pipe
3. Insofar as is practical, close all building doors and
windows between the space in which the appliances
remaining connected to the common venting system
are located and other spaces in the building. Turn on
clothes dryers and any appliance not connected to the
common venting system. Turn on exhaust fans, such
as range hoods and bathroom exhausts, so they will
operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers.
Draft Control
12" Minimum – 18" Maximum
4. Following the lighting instructions, place the unit being
inspected in operation. Adjust the thermostat so the
appliance will operate continuously.
5. Test for spillage at the draft control relief opening after
5 minutes of main burner operation. Use the flame of
a match or candle.
6. After it has been determined that each appliance
remaining connected to the common venting system
properly vents when tested as outlined above, return
doors, windows, exhaust fans, fireplace dampers, and
any other fuel burning appliance to their previous
condition of use.
Figure 10
3. Both supply and return air plenums shall be square
and at least 18" long. They should be the same
dimension as the furnace opening.
4. Install supply and return air ducts as desired.
Filters
7. If improper venting is observed during any of the
above tests, the common venting system must be
corrected. See National Fuel Gas Code, ANSI
Z223.1 (latest edition) or CAN/CGA B149.1 & .2
Installation Codes to correct improper operation
of common venting system.
Horizontal/Counterflow
Smoke Pipe and Draft Control
Optional filter kits:
Connect the furnace vent to the chimney with galvanized
smoke pipe and fittings, maintaining full diameter of
furnace vent throughout. No reduction in diameter of pipe
is allowed. It is best to have smoke pipe as short and
direct as possible. The smoke pipe shall maintain a rise of
at least 1/4" per foot. Install draft control at least 12"
beyond the furnace. If there is no space to install the draft
control in the smoke pipe, it may be installed in the
chimney above the smoke pipe (see Figure 10).
•
•
Supply and Return Air Plenum
Secure return air plenum to unit using sheet metal screws.
Follow these procedures when installing supply air plenum:
Neither the horizontal nor the counterflow units contain
filters. Filters must be installed in the return duct system.
Optional filter kits are available. Contact the supplier to
obtain the correct filter kit.
Kit for 57/72 & 84/95 units – #AFILT535-1
Kit for 112/125 units – #AFILT536-1
Upflow/Basement
Permanent filters are supplied with these units. The large
upflow unit comes with two filters. Use both filters when
more than 1600 CFM is needed. To clean the filters, shake
to remove any excess dirt and/or use a vacuum cleaner.
Wash with soapy detergent water and dry. Metal permanent
filters need to be oiled after washing to increase their
effectiveness. The filters should be cleaned at least once a
month, or more frequently in unusually dusty environments.
Never leave the access panels to the blower compartment off or partially open.
1. Use sealing strips of fiberglass.
Oil Supply and Oil Filter Connection
2. Attach the plenum to the furnace or evaporator
cabinet with sheet metal screws.
# 48288J005
Continuous lengths of heavy wall copper tubing or steel
pipe are recommended and should be installed under the
Page 9
floor or near walls to protect from damage. Do not run
lines on floor joists or other reverberating surfaces. Always
use flare fittings located in accessible places.
Install a generous capacity oil filter inside building between
the fuel shutoff valve and burner. Locate filter and valve
close to burner for easy servicing. An oil filter is required
for all models. A 10-micron filter is recommended.
Combustion Chamber
stat debounce delay before responding to the call for fan
by ramping the circulating blower up to 50% of the cooling
speed. When the call for continuous fan is satisfied, the
control immediately ramps down the circulating blower.
Humidifier
Terminals are provided on the control board which provides a
120-volt output to operate a humidifier. The “HUM” terminal
is energized whenever the thermostat calls for heat. Refer to
furnace wiring diagram for specific connection information.
The combustion chamber is installed in the furnace at the
factory. Read the instruction plate on the front of the unit
concerning proper care of the chamber.
Electronic Air Cleaner
This combustion chamber is made of preformed ceramic fiber
material. Use extreme care when installing the oil burner so
that the chamber is not damaged around the burner tube.
Terminals are provided on the control board for connection of a 120-volt electronic air cleaner. The “EAC” terminal is energized whenever the thermostat calls for heat,
cooling, or continuous blower. Refer to the furnace wiring
diagram for specific connection information.
Electrical Wiring
Variable Speed Features
All wiring must conform to the National Electrical Code,
the Canadian Electrical Code, and any local codes.
Connect the 115-volt, single phase service to the unit at
the junction box. Use a separate fused branch electrical
circuit containing a properly sized fuse or circuit breaker.
Run this circuit directly from the main switch box to an
electrical disconnect that is readily accessible and located
near the furnace. Follow carefully the wiring diagram
adhered to the inside of the blower compartment door.
The electrical supply to the mechanical vent system must be
supplied from the appliance. All wiring must be appropriate
Class I wiring. Wiring must be installed in rigid metal
conduit, intermediate metal, or be otherwise suitably protected from physical damage. Refer to the wiring diagrams
supplied with the venter kit for proper electrical connections.
Thermostat
Locate the thermostat on an inside wall in a room usually
occupied during the day, such as a living room or dining
room, at a height of 4-1/2' from the floor. Avoid direct
sunlight or supply air from a register. Make sure the location
is not adjacent to appliances such as ovens or lights. Wire
the thermostat with minimum of #18 AWG thermostat wire.
Continuous Blower Operation
The comfort level of the living space can be enhanced
when using this feature by allowing continuous circulation
of air between calls for cooling or heating. The circulation
of air occurs at half the full cooling airflow rate. This can
produce more even temperatures throughout the home
and/or continuous operation of IAQ accessories.
To enable the continuous blower operation, place the fan
switch on the thermostat into the ON position. A call for
fan from the thermostat closes R to G on the blower
interface board. The control waits for a 1-second thermoPage 10
This furnace is equipped with a variable speed circulation
air blower motor that will deliver a constant airflow within a
wide range of external static pressures. Other features of
this variable speed motor include:
Blower Ramp Up
The variable speed motor will slowly ramp up to normal
operating speed. This minimizes sound and increases
comfort by eliminating the initial blasts of air encountered
with standard blower motors.
Blower Ramp Down
At the end of a cooling or heating cycle, the variable
speed motor will slowly ramp down. If continuous blower
operation has been selected, the variable speed motor will
slowly ramp down to 50% of the selected cooling CFM.
Passive and Active Dehumidification
For situations where humidity control is a problem, a
dehumidification feature has been built into the variable
speed motor. At the start of each cooling cycle, the
variable speed motor will run at 82% of the rated airflow
for 7.5 minutes. After 7.5 minutes has elapsed, the motor
will increase to 100% of the rated airflow.
To achieve additional dehumidification, remove the
dehumidify jumper located at the bottom right of the
blower interface board (see Figure 11) and connect a
humidity control that opens on humidity rise to the HUM
and R terminals. The HUM terminal on the blower interface
board must be connected to the normally closed contact of the
humidity control so that the board senses an open circuit on
high humidity. In this setup, the variable speed motor will
operate at 82% of the normal cooling airflow rate whenever there is a call for dehumidification. When the relative
# 48288J005
humidity has been brought down to an acceptable level,
the cooling blower speed will return to 100% of design.
Circulating Airflow Adjustments
Cooling Mode
The units are factory set for the nominal airflow for each
model. Adjustments can be made to the cooling airflow by
changing the position (A, B, C, or D) of the jumper plug on
the tap marked COOL (on the blower interface board) based
on the information provided in Figure 11. To determine what
CFM the motor is delivering at any time, count the number of
times the LED labeled CFM on the blower interface board
flashes. Each flash signifies 100 CFM; count the flashes and
multiply by 100 to determine the actual CFM delivered (for
example: 10 flashes x 100 = 1000 CFM).
Moving the jumper plug on the tap marked ADJUST from
the NORM position to the (+) or (–) position will increase
Adjusting Airflow
or decrease the cooling airflow (Y or O call) by 15%.
Changing the position of the ADJUST jumper plug does
not affect heating airflow except if a heat pump is used in
conjuction with the oil furnace. If a heat pump is used,
moving the ADJUST jumper plug to the (+) or (–) position
will increase or decrease the airflow by 15% when operating in all heat pump modes, but will not affect heating
airflow when the oil furnace is used for heating.
For single stage cooling, jumper Y1 and Y2 to obtain rated
cooling CFM. In two stage cooling configuration, Y1 will
produce 70% of rated cooling CFM and Y2 will produce 100%.
Heating Mode
The unit as shipped is factory set to run at the middle of
the heating rise range as shown on the unit rating plate.
The jumper plug on the tap marked HEAT should remain
in the position (A, B, C, or D) listed in the HEAT Setting
column found in Figure 11.
ADJUST*, HEAT, and COOL Taps
(on Blower Interface Board)
ADJUST
NORM
(+)
(–)
TEST
* Placing ADJUST jumper plug in the TEST position energizes the motor to a default factory
setting. This can be used to determine if the motor is operating properly. Test pin function
is enabled during any mode of thermostat call. If no thermostat call is present, test
function is disabled. The ADJUST jumper plug must be returned to original position after
testing procedure is completed. Failure to do so will result in improper air flow.
Model
LUF80C57V12
HEAT
COOL
A
B
C
D
A
B
C
D
D1
DEHUMIDIFY
CUT TO ENABLE
Heating CFM @ .50 Static
Cooling CFM @ .50 Static
Motor HEAT Heating
HEAT
HEAT
HEAT
HEAT COOL COOL COOL COOL
HP
Setting
CFM Setting Setting Setting Setting Setting Setting Setting Setting
A
B
C
D
A
B
C
D
1/2
D
750
1300
1100
1000
LUF80C72V12
1/2
LUF80C84V14
1/2
750
1200
1000
C
1000
1300
1100
D
1200
1500
1400
800
600
1000
750
1200
1300
1200
1400
1000
800
600
1200
1000
800
LUF80C95V14
1/2
C
1300
1500
1400
1300
1200
1400
1200
1000
800
LUF80C112V20
3/4
D
1400
1850
1730
1550
1400
2000
1800
1600
1200
LUF80C125V20
3/4
B
1730
1850
1730
1550
1400
2000
1800
1600
1200
LBF80C84V14
1/2
D
1200
1550
1450
1400
1200
1400
1200
1000
800
LBF80C95V14
1/2
B
1450
1550
1450
1400
1200
1400
1200
1000
800
LBF80C112V20
1
D
1450
2000
1730
1550
1450
2000
1800
1600
1200
LBF80C125V20
1
B
1730
2000
1730
1550
1450
2000
1800
1600
1200
LBR80C84V14
1/2
D
1200
1550
1450
1400
1200
1400
1200
1000
800
LBR80C95V14
1/2
B
1450
1550
1450
1400
1200
1400
1200
1000
800
LBR80C112V20
1
D
1450
2000
1730
1550
1450
2000
1800
1600
1200
LBR80C125V20
1
B
1730
2000
1730
1550
1450
2000
1800
1600
1200
LHF80C84V12
1/2
D
1000
1300
1200
1150
1000
1200
1000
800
600
LHF80C95V12
1/2
B
1200
1300
1200
1150
1000
1200
1000
800
600
LHR80C84V12
1/2
D
900
1200
1100
1000
900
1200
1000
800
600
LHR80C95V12
1/2
B
1100
1200
1100
1000
900
1200
1000
800
600
# 48288J005
Figure 11
Page 11
START-UP
Burner Adjustment
All adjustment to this furnace and its components
must be done by a qualified service technician.
Oil Burner
Burner Specification: Factory Settings
Refer to Table 2 for nozzle and pump pressure information.
1. Burner type: AFG (57 – 125)
2. Air tube combination:
AF50XZT (57/72)
AF50YB
(84/95 and 112/125)
3. AFG Static Plate
2-3/4"
WARNING
Do not attempt to start the burner when
excess oil has accumulated in the chamber,
when the furnace is full of vapor, or when
the combustion chamber is very hot. Such
actions could result in property damage,
personal injury, or death.
Burner Information
Furnace Burner
Nozzle/Angle
Model Head
57*
F0
.50 GPH/80°
Del-o-flo A
100 PSI
72*
F0
.65 GPH/80°
Delavan B
100 PSI
84*
F6
.65 GPH/80°
Delavan B
140 PSI
95*
F6
.75 GPH/80°
Delavan B
140 PSI
112
F6
.85 GPH/80°
Delavan B
140 PSI
125
F6
1.00 GPH/80° Delavan B
140 PSI
* Denotes low fire baffle installed. See oil burner
specifications included with instructions.
Table 2
CAUTION
Do not start burner unless blower access door
is secured in place.
Spray
Pump
Pattern Pressure
Burner Start-Up
The proper way to adjust an oil burner is with a CO2 analyzer
and a smoke gun. A properly adjusted burner will result in a
quiet, clean fire which will prevent sooting and minimize
cleaning. Using the following procedure will provide a margin
of reserve air to accommodate variable conditions.
1. Set the operating control to call for heat.
To adjust the burner:
2. Open all shutoff valves in the oil supply line to burner.
1. Punch a 5/16" diameter service hole in the flue outlet.
This sampling hole should be at least two flue diameters above the breech, or elbow at the breech, but
ahead of the barometric damper.
3. While the ignition is on, press and release the reset
button (hold 1/2 second or less). If the control has not
locked out since its most recent complete heat cycle,
the lockout time will be extended to 4 minutes, and
the ignition will remain on for the entire heat cycle.
4. Bleed the pump until all froth and bubbles are purged. The
bleed port is located on the bottom of the fuel pump. To
bleed, attach a clear plastic hose over the vent plug.
Loosen the plug and catch the oil in an empty container.
Tighten the plug when all the air is purged. NOTE:
Bleeding might not be necessary with a two-pipe system.
5. If prime is not established within the extended lockout
time, the control will lock out. Press the reset button to
reset control (see Step 3). NOTE: The reset button can be
held for 30 seconds at any time to reset the control’s
lockout counter to zero and send the control to standby.
6. Repeat Steps 3 and 4, if necessary, until pump is fully
primed and oil is free of bubbles. Then terminate the call
for heat, and the control will resume normal operation.
Page 12
2. Operate burner for approximately 5 to 10 minutes.
3. Take a draft reading at the service hole in the flue
outlet. Adjust barometric draft control in the stack to
achieve an overfire draft of –.01" to –.02" and a
breach of –.02" to –.04".
4. Pull and record a smoke reading at the service hole
using an industry standard smoke tester.
5. If the burner is producing more than #1 smoke, adjust
the air shutter (primary), and air band (secondary) to
reduce the smoke (see Figure 12). To adjust the air
shutter, loosen the top screw on air shutter (and lower
screw, if necessary) and rotate the shutter until
desired smoke level is achieved. If smoke cannot be
reduced to desired level by moving the air shutter,
adjust the air band to increase the air. To adjust the air
band, loosen the air band screw and rotate the band.
# 48288J005
Beckett Oil Burner Nozzle Adjustment
Beckett Oil Burner Air Shutter/Band
2
Gauge
1
Loosen this
screw to adjust
the air band.
Remove burner from furnace for this procedure. To
adjust nozzle:
Air Shutter
(Primary)
1. Loosen screw.
2. Slide entire nozzle/electrode assembly back and
forth until nozzle just touches gauge.
Air Band
(Secondary)
Figure 12
6. Once the desired smoke level is achieved, use a
suitable test instrument for CO2 to take and record a
CO2 reading at the service hole in the flue outlet.
Figure 13
2. Nozzle adjustments are made by sliding the entire
nozzle assembly forward or backward within the blast
tube (see Figure 13).
To check nozzle alignment:
7. Adjust the air shutter (and air band, if necessary) to
reduce CO2 to the desired percentage.
1. Insert the small end of the “T” gauge into the end of the
cone and measure the nozzle and electrode alignment
against the center lines marked on the gauge.
8. Recheck smoke level.
2.
9. Recheck draft and CO2 reading at the service hole in
the flue outlet.
10. Using a suitable thermometer, obtain and record the flue
gas temperature at the service hole in the flue outlet.
11. Use the CO2 reading and the flue gas temperature
reading to determine unit efficiency.
12. When the proper combustion and smoke readings
have been achieved, tighten the air shutter screw(s)
and air band screws that were loosened in Step 5.
Nozzle and Electrode Alignment
Proper nozzle and electrode depth and alignment are
essential for proper burner operation. Figure 13 shows the
proper adjustment procedure using the Beckett “T” gauge.
To check and adjust the nozzle depth:
1. Insert the small end of the “T” gauge into the end of
the cone and measure from the flat of the end cone to
the tip of the nozzle. The proper measurement should
be 1.13". When the depth is correct, the tip of the
nozzle should just touch the base of the “T” gauge.
# 48288J005
If nozzle is not centered, but found to be too far left or
right, a new nozzle will need to be ordered. Do not
attempt to adjust by bending the 90° elbow in oil line.
OPERATION
Sequence of Operation
Heating (see Figure 14 on page 14)
The thermostat calls for heat, activating the burner motor. After
a 15-second pre-purge period, power is sent to the burner and
ignition is established. When the burner pump reaches full
speed, the solenoid valve is energized. After the thermostat is
satisfied, the thermostat circuit opens. The solenoid valve is
de-energized before the pump rotation stops. Power to the
burner is interrupted, shutting down the burner.
Cooling
Unit is set up at the factory for single stage cooling. For two
stage cooling operation, the jumper wire running from Y1 to Y2
on the blower interface board must be clipped and removed.
See Figure 18 on page 16 for two stage cooling wiring.
If the active dehumidification feature is enabled, the
circulating blower runs at 82% of the selected cooling
speed as long as there is a call for dehumidification.
Page 13
(passive dehumidification mode). After 7.5 minutes, the
blower motor runs at 70% of the selected cooling air flow
until 1st stage cooling demand is satisfied.
Heating
w
W
1
min
1
min
A call for 2nd stage cooling from the thermostat closes the R to
Y2 circuit on the blower interface board. The blower motor
ramps up to 100% of the selected cooling air flow. When the
demand for cooling is met, the blower ramps down to Y1 until
satisfied, then ramps down to 57% for 1 minute, then turns off.
3.5 min
82%
100%
50%
13%
W - Heat Demand Present
CALL
w - Heat Demand Satisfied
Two Stage Cooling
OFF
Y1 / Y2 Y1 / y2
Y1
Figure 14
7.5
minutes
IMPORTANT
100%
70%
1
min
57%
57%
The system must not be in either the passive
or active dehumidification mode when charging a cooling system.
70%
1
min
57%
y1
CALL
Single Stage Cooling (see Figure 15)
y1
Y1 - 1st Stage Cool Demand Present
OFF
y1 - 1st Stage Cool Demand Satisfied
A call for cooling from the thermostat closes the R to Y
circuit on the blower interface board. The control waits for a
1-second delay before energizing the circulating blower to
82% of the selected cooling CFM (passive dehumidification
mode). After 7.5 minutes, the circulating blower automatically ramps up to 100% of the selected cooling airflow.
When the call for cooling is satisfied, the circulating blower
ramps back down to 82% of the selected cooling airflow
for 1 minute, then shuts off.
Single Stage Cooling
y
Y
7.5 minutes
100%
82%
Y2 - 2nd Stage Cool Demand Present
y2 - 2nd Stage Cool Demand Satisfied
Figure 16
Heat Pump
For heat pump operation, clip the jumper wire between R and
O. In heat pump mode, a call for heat pump operation follows
the same sequence as a call for cooling with the exception
that there is a 30-second blower ramp up to blower CFM.
Continuous Fan (see Figure 17)
1
min
82%
When the thermostat is set for continuous fan operation
and there is no demand for heating or cooling, a call for fan
closes the R to G circuit and the circulating blower motor
runs at 50% of the selected cooling CFM until switched off.
Y - Cool Demand Present
y - Cool Demand Satisfied
CALL
Continuous Fan
OFF
G
g
Figure 15
50%
Two Stage Cooling (see Figure 16)
A call for 1st stage cooling from the thermostat closes the R
to Y1 circuit on the blower interface board. The control waits
for a 1-second delay before energizing the circulating blower.
The blower motor runs at 57% of the selected air flow for
the first 7.5 minutes of the 1st stage cooling demand
Page 14
G - Fan Switch ON
CALL
g - Fan Switch OFF
OFF
Figure 17
# 48288J005
MAINTENANCE AND SERVICE
Heat exchanger cleanout kit #ABRSH380-3 is available
for purchase.
Oil Burner
Emergency Replacement Motor Operation
It is recommended that the nozzle and oil filter be checked
before each heating season. Also recheck the conditions
shown on the OIL FURNACE START-UP CHECKLIST
found on page 2.
Close the oil line shutoff valve if the burner is shut
down for an extended period of time.
Flue Pipe
Have the flue pipe inspected annually by a qualified
service technician. If any soot or ash has formed inside
the flue pipe, remove and clean. If the flue pipe has any
holes or is rusted out, replace with a new flue pipe of the
same size. Inspect the flue draft control device and
replace if defective.
If the variable speed motor in this furnace needs to be
replaced in an emergency situation (such as “no heat”) and
an exact replacement motor is not immediately available, a
standard PSC motor of equivalent frame size, voltage,
rotation, and horsepower can be temporarily installed until
the correct replacement motor can be obtained.
Connect the desired speed taps to the HEAT and COOL
terminals and the neutral tap to the neutral terminal on the
control board (refer to the furnace wiring diagram).
Verify that the unit is operating at the desired speed and
within the rise range as shown on the unit rating plate.
The correct replacement motor must be installed as
soon as possible to ensure continued satisfactory
operation of the furnace.
Blower
Emergency Fuel Pump Replacement
Blower motor is pre-lubricated and sealed for extended
operation. No further lubrication is required. The blower
assembly may be removed from the cabinet for cleaning
and servicing of the blower. Disconnect power to the unit
before servicing.
Heat Exchanger
To clean the heat exchanger:
If replacement of the A2EA6520 fuel pump becomes
necessary, replace it with another Beckett CleanCut fuel
pump. In an emergency situation where the correct
replacement parts are not available, an A2VA7116 fuel
pump could be used. This option can produce a smoky
start-up and shutdown that could result in fouling of a heat
exchanger. This is only a short-term option and
should be used only until the correct parts can be
obtained and installed.
1. Remove the vent pipe from the furnace.
Complete National Fuel Gas Codes are available from:
2. Remove the locking screws and the caps from the two
cleanout tubes; remove the flue access elbow.
3. Using a long spiral wire brush, sweep down the outer
drum of the heat exchanger. Using a shop vacuum
hose attachment, vacuum out all loose debris.
4. Remove the locking screw and cap from the inspection tube and with the spiral wire brush reach upward
toward the rear of the heat exchanger to clean out the
crossover tube; replace the locking screw and cap on
the inspection tube.
1. American Gas Association
1515 Wilson Boulevard
Arlington, VA 22209
2. National Fire Protection Association, Inc.
1 Battery March Park
Quincy, MA 02269
3. American National Standards Institute, Inc.
Publications Sales Department
11 West 42nd Street
New York, NY 10036
5. Do not attempt to clean the combustion chamber, as it
can be easily damaged.
6. Replace the three previously removed cleanout caps
and flue access elbow, making sure to re-install the
locking screws.
7. Brush out and vacuum the vent outlet area of the
outer drum and reattach the vent pipe.
8.
Clean up around burner, blower deck, and vestibule area.
# 48288J005
Page 15
POWER SUPPLY 120 VOLTS
GRN
WHT
BLK
LINE VOLTAGE-FACTORY
LINE VOLTAGE-INSTALLER
LOW VOLTAGE-FACTORY
LOW VOLTAGE-INSTALLER
GROUND
L2
L1
JUNCTION BOX
WHT
BLK
INTERLOCK
SWITCH
120 VAC
TRANSFORMER
UNUSED
MOTOR
LEADS
N
S
E
A
C
C
O
N
T
C
O
O
L
24 VAC
H
U
M
X
H
E
A
T
YEL
YEL
C
BLK
BLK
RED
WHITE
RED
ORANGE
RED
AUX
LIMIT
T
3/T
RED
MAIN
LIMIT
WHT
CONTROL
BOARD
ST9103
(IF USED)
WHT
WHT
BURNER
MOTOR
OIL
BURNER BLK
MOTOR
IGNITOR
ORANGE
BLUE
WHT
BLK
G
W
*
R
INTERRUPT
Y
ECM
BLOWER
MOTOR
C
THERMOSTAT
L2
L1
7184
OIL PRIMARY
CONTROL
WHITE
W Y G R
CONDENSER
BLUE
1 2 3 4 5
BLACK
WHITE
YELLOW
GREEN
YEL
RED
RED
HUM
R
C1 (RCom)
WI
O
Y2
Y1
G
INTERFACE
BOARD
* FOR HEAT ONLY (TWO WIRE) THERMOSTAT, CONNECT TO R & W.
INPUT
CHOKE
(IF USED)
GREEN
Two Stage Cooling
CONTROL BOARD
R
Y
C
THERMOSTAT
W Y2 Y1 G R
INTERFACE
BOARD
R
RED
DO NOT CONNECT C (COMMON) CONNECTION BETWEEN INDOOR UNIT
AND THERMOSTAT EXCEPT WHEN REQUIRED BY THE INDOOR THERMOSTAT.
REFER TO THE THERMOSTAT INSTALLATION INSTRUCTIONS.
*
* Jumper between Y2 and Y1 on the blower
interface board must be removed to enable
two stage cooling.
WI
O
Y2
Y1
G
Wiring Diagram
P/N 48252-001
Figure 18
Page 16
# 48288J005
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