r
Oil Fired Water Boiler
Beckett Model NX Burner
Warning–Notice to Owner
!
Warning–To Professional
!
Installer or Service Provider
Please read and follow all instructions on Page 3 in this
manual regarding your responsibilities in caring for you
heating equipment
Contact a qualified service
agency for installation and
start-up. Incorrect Installation,
adjustment, or misuse of this
burner could result in severe
personal injury, death or
substantial property damage.
S119
WM 550-141-996/1105 Page 1
RWB 6104WMNX R1005
Please read and follow all instructions contained in this
manual before installing, starting or servicing this
heating system.
Incorrect Installation,
adjustment, or misuse of
this burner could result in
severe personal injury,
death or substantial
property damage.
S120
Table of Contents
Hazard Defi nitions and Owner’s Information ........................................................................................3
Information To Be Used Only By Qualifi ed Service Technicians
Weil McLain Burner Specifi cation ..............................................................................................................4
General Information .........................................................................................................................................5
Certifi cations/Approvals………………………………………………………….. ..................................................5
Notice Special Requirements ...........................................................................................................................6
Inspect/Prepare Installation Site .................................................................................................................7
Clearances to Burner and Appliance ...............................................................................................................7
Inspect Chimney or Direct Vent System .........................................................................................................7
Combustion Air Supply .....................................................................................................................................7
Safety Shutoff for Direct Vent System .............................................................................................................7
Direct/Sidewall Venting Application ................................................................................................................7
Fuel Line Installation .........................................................................................................................................8
Fuel Line Valves and Filters .............................................................................................................................8
System Wiring ..................................................................................................................................................8
Prepare the Burner ...........................................................................................................................................9
General .........................................................................................................................................................9
Mount Burner on Appliance .............................................................................................................................9
Connect Fuel Lines ...........................................................................................................................................9
Wiring Connection Diagram .............................................................................................................................9
Start the Burner and Set Combustion ....................................................................................................12
Start-up and Initial Settings ............................................................................................................................12
Set Combustion with Test Instruments .........................................................................................................13
Cover Installation ............................................................................................................................................13
Trained Service Technician’s Regular Maintenance .........................................................................14
Removing Nozzle Line for Service .................................................................................................................14
Nozzle Installation ...........................................................................................................................................15
Check/Adjust Electrodes ................................................................................................................................16
Check Retention Head Alignment and Cad Cell Sighting ............................................................................16
Check/Adjust “Zero” Calibration ...................................................................................................................16
Blower Wheel Replacement ...........................................................................................................................17
Replacement Parts Diagram .......................................................................................................................18
Replacement Parts Diagram ...........................................................................................................................18
Replacement Parts List ...................................................................................................................................19
Beckett Limited Warranty Information ...................................................................................................20
Page 2 WM 550-141-996/1105
RWB 6104WMNX R1005
r
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General Information
Hazard Defi nitions
Danger–Designation
!
Denotes presence of a hazard which, if ignored, will
result in death, severe personal injury, and/or
substantial property damage.
Death, personal Injury, and/or
substantial property damage
Warning–Designation
!
Denotes presence of a hazard which, if ignored,
could
result in death, severe personal injury, and/or
substantial property damage.
Death, personal Injury, and/or
substantial property damage
Caution–Designation
!
Denotes presence of a hazard which, if ignored,
could result in personal injury and/or property
damage.
Denotes presence of a hazard which,
if ignored, could result in personal
injury and/or property damage
NOTICE
Intended to bring special attention to infor-
mation, but not related to personal injury or
property damage.
S118
S103
S102
To the Owner:
Thank you for purchasing a Beckett NX burner
for use with your heating appliance. Please pay attention to the Safety Warnings contained within this instruction manual. Keep this manual for your records
and provide it to your qualifi ed service agency for use
in professionally setting up and maintaining your NX
burner.
Your NX burner will provide years of effi cient operation
if it is professionally installed and maintained by a qualifi ed service technician. If at any time the burner does
not appear to be operating properly, immediately con-
tact your qualifi ed service agency for consultation.
We recommend annual inspection/service of your
oil heating system by a qualifi ed service agency.
Daily – Check the room in which your burner/appliance
is installed. Make sure:
Air ventilation openings are clean and unobstructed
•
Nothing is blocking burner inlet air openings
•
No combustible materials are stored near the heating
•
appliance
There are no signs of oil or water leaking around the
•
burner or appliance
Weekly
Check your oil tank level. Always keep your oil tank
•
full, especially during the summer, in order to prevent
condensation of moisture on the inside surface of the
tank.
!
Contact a professional, qualified service agency for the
installation, adjustment and service of your oil heating
system. This work requires technical training, trade
experience and the proper use of special combustion test
instruments.
Please carefully read and comply with the following
instructions:
Never store gasoline or combustible materials near this
burner or appliance.
Never attempt to burn garbage or refuse in this
appliance.
Never attempt to light the burner/appliance by throwing
burning material into the appliance.
Never attempt to use gasoline, crankcase, waste oil, o
other fuels not approved for use in this burner.
Never restrict the air inlet openings to the burner or the
combustion air ventilation o
Warning – Owner’s
Res
onsibilt
enings in the room.
Incorrect installation, adjustment, and
use of this burner could result in severe
personal injury death, or
substantial property
damage from fire, carbon
monoxide poisoning, soot
or explosion.
S101
WM 550-141-996/1105 Page 3
RWB 6104WMNX R1005
Weil-McLain Burner Specifi cations
NOTICE
The remainder of this manual contains Information to be used ONLY by a
qualifi ed Service Technician.
NX Burner Specifi cations for Weil-McLain Ultra Oil Boilers
Verify that burner specifi cation number (on burner carton) and confi guration agrees with information below.
Table 1. Burner Confi gurations
The table below provides burner specifi cations and starting air settings for NX burners applied to Weil-McLain Model
UO boilers. Follow all instructions in this burner manual, the boiler manual and the fuel pump literature to install, setup
and service the burner.
Boiler
Model
UO-3 CV WL5703
UO-3 CV WL5703 1.00 NX70LC 1-3/4” 0.75 X 60oB
UO-4 CV WL5704 1.20 NX90LB 3-1/2” 1.00 X 70oB
UO-5 CV WL5705 1.40 NX90LD 3-1/2” 1.10 X 70oB
UO-3 DV WL5803
UO-3 DV WL5803 1.00 NX70LC 1-3/4” 0.75 X 60oB
UO-4 DV WL5804 1.20 NX90LB 3-1/2” 1.00 X 70
UO-5 DV WL5805 1.40 NX90LD 3-1/2” 1.10 X 70
Burner
Spec
(See Note1)
(See Note1)
Firing
Rate
(GPH)
0.80 NX70LC 1-3/4” 0.65 X 60oA
0.80 NX70LC 1-3/4” 0.65 X 60oA
Air Tube
Combina-
tion
Inser-
tion
Primary
Nozzle
Delavan
Hago
Hago
Hago
Delavan
Hago
Hago
Hago
o
B
o
B
Alternate
Nozzle
0.65 X 70oB
Hago
0.75 X 60oB
Delavan
1.00 X 70oB
Delavan
1.10 X 70oB
Delavan
0.65 X 70oB
Hago
0.75 X 60oB
Delavan
1.00 X 70oB
Delavan
1.10 X 70oB
Delavan
Fuel
Pump
Pres-
sure
(psig)
150 1.75
175 2.50
140 4.00
160 1.50
150 1.75
175 2.50
140 4.00
160 1.50
Head/
Adjust-
ment
Plate
Setting
Air
1) Shipped as 1.0 GPH Burner Confi guration. The 0.80 GPH input uses same burner as 1.0 GPH input. Replace
nozzle, adjust pump pressure and Head/Air setting as shown above and install 14”x16” blanket on combustion
chamber fl oor. (See Maintenance Section for Nozzle Replacement details.)
Page 4 WM 550-141-996/1105
RWB 6104WMNX R1005
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General Specifi cations
General Specifi cations
Table 2 – Burner Specifi cations
Capacity LB & LC
Firing rate 0.40 – 1.35 GPH
Input 56,000 – 189,000 Btu
LD & LF
Firing rate 1.10 - 1.75 GPH
Input 154,000 – 245,000 Btu/h
Fuels U. S No. 1 or No. 2 heating oil only
...........(ASTM D396)
Canada No. 1 stove oil or No. 2
.........furnace oil only
Electrical Power supply 120 volts AC, 60 Hz,
.............single phase
Operating load 5.8 Amps max
Motor 1/7 hp, 3450 rpm, NEMA 48M
frame PSC rotation CCW
when facing shaft end
Ignition Continuous duty solid-state
igniter
Fuel pump Outlet pressure ...... Note 1
Air tube ATC code .......See Table 3
Dimen-
sions
(with
cover)
Note 1. See appliance manufacturer’s burner specifi ca-
tions for recommended outlet pressure.
Height (maximum) 12-1/2 inches
Width (maximum) 15 inches
Depth ............ 9-1/4 inches
Air tube diameter 3-1/4 inches
!
Warning–Professional
Service Required
This equipment must be installed, adjusted and put into
operation only by a qualified individual or service agency
that is:
x Licensed or certified to install and provide technical
service to oil heating systems.
x Experienced with all applicable codes, standards and
ordinances
x Responsible for the correct installation and
commission of this equipment
x Skilled in the adjustment of oil burners using
combustion test instruments.
The installation must strictly comply with all applicable
codes, authorities having jurisdiction and the latest
revision of the National Fire Protection Association
Standard for the Installation of Oil-Burning Equipment,
NFPA 31 (or CSA B139 and B140 in Canada).
Regulation by these authorities take precedence over the
general instructions provided in this installation manual.
Read and understand the manual
supplied with this equipment. Incorrect
installation, adjustment, and use of
this burner may result in
severe personal injury
death, or substantial
property damage from
fire, carbon monoxide
poisoning, soot or
ex
losion.
S105
Table 3 – Air Tube Combination (ATC)
codes
Firing rate
(gph)
(min-max) 5” 7” 9”
0.40-1.35 9-Slot NX50LB NX70LB NX90LB
0.40-1.35 6-Slot NX50LC NX70LC NX90LC
1.10-1.75 9-Slot NX50LD NX70LD NX90LD
1.10-1.75 6-Slot NX50LF NX70LF NX90LF
Head ATC codes for usable air tube
lengths:
Certifi cations/approvals
•
Underwriters Laboratories has certifi ed this burner
to comply with ANSI/UL 296 and has listed it for
use with #1 or #2 fuel oil as specifi ed in ASTM
D396. Low sulfur #1 and #2 fuel oils reduce heat
exchanger deposits with all burners compared to
the standard fuels. Reduced deposits extend the
service interval for cleaning and improve the effi -
ciency of the appliance over time. Low sulfur fuels
reduce particulate and oxides of nitrogen emissions as well. The Oilheat Manufacturers’ Association recommends these fuels as the preferred fuels
for this burner.
WM 550-141-996/1105 Page 5
RWB 6104WMNX R1005
General Specifi cations
State and local approvals are shown on burner rat-
ing label mounted on the burner housing.
For recommended installation practice in Canada,
refer to the latest version of CSA Standard B139 &
B140.
Figure 1. Burner label location
Notice Special Requirements
•
Concealed damage — If you discover damage to
the burner or controls during unpacking, notify the
carrier at once and fi le the appropriate claim.
When contacting Beckett for service information —
Please record the burner serial number (and have
available when calling or writing). You will fi nd the
serial number on the silver label located on the left
rear of the burner. Refer to Figure 1.
Page 6 WM 550-141-996/1105
RWB 6104WMNX R1005
Site Preparation
Inspect/Prepare Installation Site
Clearances to Burner and Appliance
•
Provide space around burner and appliance for
ease of service and maintenance.
Check the minimum clearances against those
shown by the appliance manufacturer and by applicable building codes.
Inspect Chimney or Direct Vent System
•
Inspect the chimney or vent. Make sure it is prop-
erly sized and in good working condition. Follow
the instructions supplied by the appliance manufacturer.
Combustion Air Supply Information
•
Warning–Adequate Air
!
Supply Required
The burner cannot properly burn the fuel if it is
not supplied with a reliable combustion air
source. A non-reliable air source could result in
incomplete combustion, causing sooting and
possible carbon monoxide emission.
Possible Sooting &
Asphyxiation Hazard
See NFPA Standard 31 for complete details.
Appliances located in confi ned spaces: All
confi ned spaces should have two (2) permanent
openings; one near the top of the enclosure and
S104
one near the bottom of the enclosure. Each opening must have a free area of not less than one (1)
square inch per 1,000 BTU’s per hour of the total
input rating of all appliances within the enclosure.
The openings should have free access to the building interior, which should have adequate infi ltration
from the outside.
Exhaust fans and other air-using devices: Size
air openings large enough to supply all air-using
devices in addition to the minimum size required
for combustion air. If there is any possibility of the
equipment room developing a negative pressure
due to exhaust fans, clothes dryers, etc., either
pipe combustion air directly to the burner or provide
a sealed enclosure for the burner and supply it with
its own combustion air supply.
Safety Shutoff for Direct Vent System
•
The direct vent blocked fl ue safety shut off system,
refer to Figure 2, shuts down the burner if the exhaust fl ue is blocked and/or if the air inlet is blocked.
It recognizes a blocked fl ue by sensing excessive
pressure in the combustion chamber. It recognizes
a blocked inlet by sensing excessive vacuum in the
air inlet adapter.
This system meets the requirements for a blocked
fl ue or blocked combustion air inlet per CSA Standard B140.0. It is designed to interrupt the cad cell
circuit and allow the control to shut down the burner.
Direct/Sidewall Venting Application
•
For direct vent installations, follow instructions pro-
vided with appliance and direct vent system. Outside combustion air is required for direct venting.
Figure 2. Pressure Switch Installation
SK9803A
WM 550-141-996/1105 Page 7
RWB 6104WMNX R1005
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Site Preparation
Fuel Line Valves and Filter
•
Warning–Connect Outside
!
Air Duct to NX Adapter.
The outside air adapter must be installed by strictly
following the kit installation instructions. Do NOT attempt to
install outside air piping without using the outside ai
adapter and instructions provided. Abundant fresh air is
re
uired for proper combustion.
Failure to install adapter
properly could result in
impaired combustion,
appliance soot-up, puffback of
smoke, and fire or
asphyxiation hazards.
S121
When installing an NX outside air adapter (Beck-
ett Part Number 5199OU), refer to the instruction
sheet supplied with the adapter. This kit allows
combustion air to be piped directly to the burner.
The NX outside air adapter kit may also be used
for chimney vent applications that require outside
combustion air.
Fuel Line Installation
•
Route the fuel line through the opening in the bottom
of the burner cover. Continuous lengths of heavy
wall copper tubing are recommended. Always use
fl are fi ttings. Never use compression fi ttings.
Install two high quality oil duty rated shutoff valves
in accessible locations on the oil supply line. Locate
one close to the tank and the other close to the
burner, upstream of the fi lter.
Also install a generous capacity fi lter, rated for 50
microns or less, inside the building between the
fuel tank shutoff valve and the burner. Locate both
the fi lter and the valve close to the burner for ease
of servicing.
NOTICE
For protection in the event of fi re, some states
require the shutoff valves to be a fusible-handle
design. R.W. Beckett Corporation recommends
this design as good industry practice for all installations.
System Wiring
•
Refer to appliance manufacturer’s wiring diagram
for electrical connections.
Always install fi ttings in accessible locations. To
avoid vibration noise, fuel lines should not run
against the appliance or ceiling joists.
Caution–Do Not Use
!
Never use Teflon tape on any fuel fitting. Tape
fragments can lodge in fuel line components and fuel
unit, damaging the equipment and preventing prope
Damage to the Pump could cause
impaired burner operation, oil
leakage and appliance soot-up.
Teflon Ta
e
S111
Page 8 WM 550-141-996/1105
RWB 6104WMNX R1005
Prepare the Burner
•
General
Burner Preparation
Warning – By-pass Plug in
!
2 Pipe System
In most cases, the burner is ready to mount to the
appliance. There can be situations where the burner needs to be reconfi gured to perform properly in
the appliance. Review the appliance manufacturer’s specifi cations prior to installing to determine if
any modifi cation is required to properly confi gure
the burner. Refer to Table 1.
Instruction on how to perform the following burner
preparation tasks can be found in the Professional
Maintenance section.
Remove / install burner nozzle
•
Check head/air adjusting plate
•
Mount Burner on Appliance
•
Verify that the air tube installed on the burner pro-
vides the correct insertion depth. Bolt the burner
to the appliance using the factory-welded fl ange.
Note that the end of the tube will extend into the
chamber on UO-4 and UO-5 boilers.
Connect Fuel Lines
•
The burner is supplied with either a one-stage
pump or a two-stage pump based on the oil supply
system requirements. Consult the instructions provided with the pump for installation specifi cations.
Caution–Oil Supply
!
Pressure Control Required
The oil supply inlet pressure to the fuel unit cannot exceed
3 psi. Insure that a pressure-limiting device is installed in
accordance with the latest edition of the NFPA 31.
Damage to Pump Seal could cause
possible oil leakage and potential
fire hazard.
The burner pump is shipped without the by-pass plug
installed. You must install this plug on two-pipe oil
systems. If the unit is a one-pipe oil system DO NOT
install the plug in the pump.
Failure to comply could cause pump
seal failure, oil leakage and the
potential for a fire and injury hazard.
S110
When installing a two-pipe system, remove the
1/16” pipe by-pass plug from plastic bag attached
to fuel unit. Remove ¼” plug from return port. Insert and tighten the by-pass plug. Attach return
and inlet lines. Start burner. Air bleeding is automatic. Open the easy fl ow air bleed valve for a
faster bleed, if desired. The return line should terminate approximately 3-4” above supply line inlet.
Failure to do this may introduce air into the system
and could result in loss of prime.
Wiring Connection Diagram
•
Burner wiring performed at jobsite: Refer to Figure
3, for typical burner interconnect wiring, Burner
wiring may vary, depending on the burner specifi -
cation. Refer to Figure 4 for burner wiring details.
All wiring must be in accordance with the latest re-
vision of National Electric Code NFPA 70 and all
local codes and regulations.
The R7184 primary control with valve-on delay and
burner motor-off delay, shown in Figure 4, requires
a constant 120 volt AC power source supplied to
the black wire on the control. The red wire goes
to the appliance limit circuit. Please note that other
control manufacturers may use different wire colors
for power and limit connections.
S109
When installing a one-pipe system, connect the
inlet line to the pump inlet. Start the burner. Arrange the primary burner control for continuous operation during priming by pressing the control reset
button during prepurge. Open the bleed valve one
turn counterclockwise. Prime the system until all
air bubbles have disappeared. Tighten the bleed
valve securely.
The fuel pump may be installed with gravity feed
or lift. The maximum allowable lift for a single pipe
installation is 8 ft.
WM 550-141-996/1105 Page 9
RWB 6104WMNX R1005
NOTICE
The NX burner has a reduced diameter air tube,
precision-designed air throttle cup and combustion head for improved performance. This design provides very accurate control of the air/fuel
ratio, but the light reaching the cad cell through
small holes in these components is limited. Be-
cause of this, the average cad cell resistance
may be higher than conventional burners
with larger openings.
Burner Preparation
Figure 3. – Burner Connections.
SK9806
Page 10 WM 550-141-996/1105
RWB 6104WMNX R1005
Figure 4. – Typical Burner Wiring & Burner Sequence of Operation
Burner Preparation
SEE
BOILER
INSTRUCTION
MANUAL
FOR
CORRECT
WIRING
BURNER DISCONNECTS
120 VAC FIELD WIRING
120 VAC FIELD WIRING
LOW VOLTAGE FIELD WIRING
LOW VOLTAGE FIELD WIRING
120 VAC FACTORY WIRING
120 VAC FACTORY WIRING
LOW VOLTAGE FACTORY WIRING
LOW VOLTAGE FACTORY WIRING
BURNER
JUNCTION BOX
R
BK
G
W
SOLENOID
VALV E
IGNITOR
BER
URN
MOTOR
CAD
CELL
R7184P Primary ontrolC
R
LIMIT
BK
L1
W
L2
W
L2
W
L2
W
L2
V
VALV E
BL/W
IGNITOR
O
MOTOR
Y
Y
BURNER PRIMARY
CONTROL
PRESSURE SWITCH
(DIRECT VENT ONLY)
1
2
3/T
T
T
R
BK
W
SK9805
Electrical shock hazard — can cause severe injury or death. Disconnect
power before installing or servicing.
Burners with Beckett Clean Cut Pump must be used with a primary
control that has a valve-on delay (pre-purge). Controls shown have
valve on delay (see control manufacturer’s instructions for timings.)
1. STANDBY. The burner is idle, waiting for a call for
heat. When a call for heat is initiated, there is a 2-6
second delay while the control performs a safe start
check.
2. VALVE-ON DELAY. The ignition and motor are
turned on for a 15 second valve-on delay.
3. TRIAL FOR IGNITION (TFI). The fuel valve is
opened. A fl ame should be established within the
15 second lockout time.
4. LOCKOUT. If fl ame is not sensed by the end of
the TFI, the control shuts down on safety lockout
and must be manually reset. If the control locks out
three times in a row, the control enters restricted
lockout.
5. IGNITION CARRYOVER. Once fl ame is estab-
lished, the ignition remains on for 10 seconds to
ensure fl ame stability before turning off. If the con-
trol is wired for intermittent duty ignition, the ignition
unit stays on the entire time the motor is running.
6. RUN. The burner runs until the call for heat is sati-
fi ed. The burner is then sent to burner motor off
delay, if applicable, or it is shut down and sent to
standby.
7. RECYCLE. If the fl ame is lost while the burner is
fi ring, the control shuts down the burner, enters a 60
second recycle delay, and then repeats the above
ignition sequence. If fl ame is lost three times in a
row, the control locks out to prevent cycling with
repetitious fl ame loss due to poor combustion.
8. BURNER MOTOR-OFF DELAY. The fuel valve
is closed and the burner motor is kept on for the
selected motor-off delay time before the control returns the burner to standby.
61351
WM 550-141-996/1105 Page 11
RWB 6104WMNX R1005
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Start the Burner
Start the Burner and Set Combustion
•
Start-up and Initial Settings
Open the shutoff valves in the oil supply line to
1.
the burner.
Referencing Figure 5 verify and/or set the Head/
2.
Air Adjustment Pointer to the value shown in
Table 1. This is an initial air setting for the pump
bleeding procedure only. Calibrated test instruments must be used for the fi nal head/air adjust-
ment.
Set the thermostat substantially above room
3.
temperature.
Close the line voltage switch to start the burner.
4.
If the burner does not start within the 3 to 10
second safety start check timing, you may have
to reset the safety switch on the burner primary
control.
Bleed the air from the fuel pump as soon as the
5.
burner motor begins rotating.
!
This equipment must be installed, adjusted and put into
operation only by a qualified individual or service agency
that is:
x Licensed or certified to install and provide technical
x Experienced with all applicable codes, standards and
x Responsible for the correct installation and
x Skilled in the adjustment of oil burners using
The installation must strictly comply with all applicable
codes, authorities having jurisdiction and the latest
revision of the National Fire Protection Association
Standard for the Installation of Oil-Burning Equipment,
NFPA 31 (or CSA B139 and B140 in Canada).
Regulation by these authorities take precedence over the
general instructions provided in this installation manual.
Read and understand the manual
supplied with this equipment. Incorrect
installation, adjustment, and use of
Warning–Professional
Service Required
service to oil heating systems.
ordinances
commission of this equipment
combustion test instruments.
this burner may result in
severe personal injury
death, or substantial
property damage from
fire, carbon monoxide
poisoning, soot or
ex
losion.
Step 1: To bleed the fuel pump, attach a clear
plastic hose over the vent fi tting. Loosen the fi t-
ting and catch the oil in an empty container. Tighten the fi tting when all the air has been purged
from the oil supply system.
Step 2: If the burner locks-out on safety during
bleeding, reset the safety switch and complete
the bleeding procedure. Note — For R7184 primary controls, see Technician’s Quick Reference
Guide, part number 61351 or 61465, for special
pump priming sequence.
Step 3: If the burner stops after a fl ame is estab-
lished, additional bleeding is probably required.
Repeat the bleeding procedure until the pump is
primed and a fl ame is established when the vent
fi tting is closed.
6.
Prepare for combustion tests by drilling a
sampling hole in the fl ue pipe between the appli-
ance and the barometric draft regulator. Seal this
hole when testing is complete. (See appliance
manufacturer for location.)
Loosen the splined nut approximately one turn.
7.
(DO NOT loosen the upper acorn nut. This is
used only for setting the zero adjustment.) (See
Figure 5.)
A 5/16” nut driver or fl at blade screwdriver can
8.
be used to turn the adjustment screw for head/air
setting.
Figure 5. – Head/air Adjustment Plate
Assembly
Scale
Upper Acorn Nut
(Lock Zero
Calibration)
Lower Acorn Nut
(Lock Air Setting)
Pointer
Splined
Nut
Adjustment
Nut
SK9667
1/4
”
S105
Page 12 WM 550-141-996/1105
RWB 6104WMNX R1005
Warning–Check for Excess
r
r
p
!
Fuel Accumulation.
Do not attempt to start the burner when excess fuel o
vapor has accumulated in the appliance. Starting the burne
under these conditions could result in a puffback of hot
combustion gases, high smoke levels, or otherwise
hazardous o
Set Combustion with Test Instruments
•
Allow the burner to run for approximately 5 to 10
1.
minutes.
Set the stack draft between -0.01” to
2.
-0.02” w.c. for chimney vent applications. No
draft adjustment required for direct venting.
eration.
Could cause death, personal
injury and/or substantial
property damage due to
equipment malfunction, heavy
smoke, soot blockage, hot gas
puff-back, fire and asphyxiation
hazard.
S112
Start the Burner
4.
Chimney Vent Systems: Install the burner cover
and repeat Steps 2 and 4 above. If CO2 increases (O2 decreases), remove the cover and adjust
the air setting so the CO2 (O2) with the cover
installed meets the requirements of Step 3.
5.
Direct Vent Systems with Outside Air Ducted to
Burner: Install the burner cover.
6.
Start and stop the burner several times to ensure
satisfactory operation. Test the primary control
and all other appliance safety controls to verify
that they function according to the manufacturer’s specifi cations.
Cover Installation
•
Install the cover mounting screws in the cover
1.
mounting plate.
Install the cover over the mounting plate while
2.
aligning the side slots with the installed cover
mounting screws.
Direct Vent specifi ed burners include an opening
3.
on the top of the cover for an outside air intake.
Follow these fi ve steps to properly adjust the
3.
burner:
Step 1: Adjust the head/air until a trace of smoke
is achieved. This can be accomplished by turning the screw on the head/air adjustment plate
assembly to increase air (CCW) or decrease air
(CW).
Step 2: At the trace of smoke level, measure the
CO2 (or O2) . This is the vital reference point
for further adjustments. Example: 13.5% CO2
(2.6% O2)
Step 3: Increase the air to reduce the CO
to 2 percentage points. (O2 will be increased by
approximately 2.0 to 2.7 percentage points.) Example: Reduce CO2 from 13.5% to 11.5% (2.6%
to 5.3% O2).
Step 4: Recheck smoke level. It should be Zero.
This procedure provides a margin of
•
reserve air to accommodate variable
conditions.
If the draft level has changed, recheck the
•
smoke and CO2 levels and readjust
burner, if necessary.
by 1.5
2
Figure 6. – Burner Cover
SK9804A
Step 5: Once the combustion has been set, tight-
en the lower acorn nut and splined nut on the air
adjustment assembly. See Figure 5.
WM 550-141-996/1105 Page 13
RWB 6104WMNX R1005
p
Professional Maintenance
Trained Service Technician’s Regular
Maintenance
While performing routine maintenance check the
following.
Replace the oil supply line fi lter. The line fi lter car-
tridge must be replaced to avoid contamination of
the fuel pump and nozzle.
Inspect the oil supply system. All fi ttings should
•
be tight and leak-free. The supply lines should be
free of water, sludge and other restrictions.
Remove and clean the pump strainer if applica-
•
ble.
Replace the used nozzle with a new nozzle per
•
appliance manufacturer’s specifi cations.
Clean and inspect the electrodes for damage, re-
•
placing any that are cracked or chipped.
Check electrode tip settings. Replace electrodes
•
if tips are rounded.
Inspect the igniter spring contacts.
•
Clean the cad cell grid surface, if necessary.
•
Make sure Low Firing Rate Baffl e is in place if
•
required for the burner application. Omitting the
baffl e can result in unacceptable burner combus-
tion.
Inspect all gaskets. Replace any that are dam-
•
aged or would fail to seal adequately.
Clean the blower wheel, air inlet, air guide, reten-
•
tion head, throttle plate and throttle ring of any lint
or foreign material.
Check motor current. The amp draw should not
•
exceed the nameplate rating by more than 10%.
Check all wiring for secure connections or insula-
•
tion breaks.
Check the pump pressure and cutoff function.
•
Check primary control safety lockout timing.
•
Check ignition system for proper operation.
•
Inspect the vent system and chimney for soot ac-
•
cumulation or other restriction.
Clean the appliance thoroughly according to the
•
manufacturer’s recommendations.
Check the burner performance. Refer to the sec-
•
tion “Set combustion with test instruments”.
It is good practice to keep a record of the service
•
performed and the combustion test results.
!
Warning–Professional
Service Required
This equipment must be installed, adjusted and put into
operation only by a qualified individual or service agency
that is:
x Licensed or certified to install and provide technical
service to oil heating systems.
x Experienced with all applicable codes, standards and
ordinances
x Responsible for the correct installation and
commission of this equipment
x Skilled in the adjustment of oil burners using
combustion test instruments.
The installation must strictly comply with all applicable
codes, authorities having jurisdiction and the latest
revision of the National Fire Protection Association
Standard for the Installation of Oil-Burning Equipment,
NFPA 31 (or CSA B139 and B140 in Canada).
Regulation by these authorities take precedence over the
general instructions provided in this installation manual.
Read and understand the manual
supplied with this equipment. Incorrect
installation, adjustment, and use of
this burner may result in
severe personal injury
death, or substantial
property damage from
fire, carbon monoxide
poisoning, soot or
ex
losion.
Disconnect the copper connector tube assembly
3.
from the nozzle line bulkhead fi tting.
Loosen the two screws securing the igniter re-
4.
taining clips and rotate both clips to release the
igniter baseplate. The igniter should pop up and
be supported by the prop spring.
Loosen the two screws securing the rear door.
5.
Swing the door to the right and down
Loosen the splined nut.
6.
S105
Remove the nozzle line electrode and head as-
Removing Nozzle Line for Service (Refer-
•
ence the Replacement Parts drawing.)
7.
sembly from the burner by drawing it straight
back and out the rear door opening. The adjustment mechanism is still attached. Be careful not
Before proceeding, turn off the main power switch
1.
to the burner.
Remove the burner cover by loosening the four
2.
thumb screws (two on each side of burner).
to damage the electrodes or insulators while handling.
To replace the nozzle assembly, reverse the
8.
above procedure.
Page 14 WM 550-141-996/1105
RWB 6104WMNX R1005
Nozzle Installation
Retention Head
Head Support Legs
Electrode Tips
Electrode Clamp
Electrode Bracket
Electrode Insulator
Electrode Extension Rods
Nozzle Adapter
Nozzle
Stops in Retention Ring
Retention Ring
Throttle Ring
Throttle Cup
Nozzle Line
Bulkhead Fitting
SK9666A
•
Obtain a nozzle having the capacity, spray angle,
and pattern specifi ed in the appliance manufac-
turer’s information or Beckett OEM Specifi cation
Guide, Part # 6711.
Make certain the correct nozzle is selected for the
actual fuel pump pressure. See Table 1.
Perform the following steps when replacing a noz-
zle.
1.
Remove the nozzle line assembly to gain access
to the nozzle.
2.
Use a ¾” open-end wrench to hold the nozzle
adapter. DO NOT attempt to remove or replace
the nozzle without securing the adapter, as nozzle alignment could be seriously affected.
3.
Do not squeeze the electrodes when handling
the nozzle line assembly. Excessive force could
change the electrode tip settings or damage the
ceramic electrode insulators.
4.
Use a 5/8” open-end wrench to carefully remove
the existing nozzle.
Professional Maintenance
Protect the nozzle orifi ce and strainer when in-
6.
stalling. If the orifi ce gets dirt in it or is scratched,
the nozzle will not function properly.
To install a new nozzle, place a ¾” open-end
7.
wrench on the nozzle adapter. Insert the nozzle
into the adapter and secure fi nger tight. Finish
tightening with a ⅝” open-end wrench. Use care
to avoid bending the burner head support legs or
electrodes.
Figure 7. – Electrode tip gap and spacing
5/32” GAP
1/4” above
nozzle center
3/32” Nozzle-to-tip
Spacing
SK9664
Do not over-torque the nozzle when install-
8.
ing. This will cause deep grooves in the nozzle
adapter, preventing a seal when a new nozzle is
installed.
5.
Inspect the nozzle adapter before installing the
new nozzle. If it is grooved or scratched on the
sealing surface, replace the nozzle line assem-
Carefully check and realign the electrode tips af-
9.
ter replacing a nozzle, ensuring the electrode settings comply with Figure 7.
bly. If the surface is damaged, oil could leak at
the nozzle to adapter joint, causing serious combustion problems.
If the head was removed when replacing the noz-
10.
zle, carefully reconnect the head to the nozzle
adapter. Make sure to align the key in the support
leg with the keyway in the nozzle adapter and
to butt the head support to the nozzle adapter
shoulder, see Figure 8.
Figure 8. – Nozzle Line/Head/Air Tube Assembly (Low fi ring rate shown.)
Retention Head
Head Support Legs
Electrode Tips
WM 550-141-996/1105 Page 15
RWB 6104WMNX R1005
Nozzle Adapter
Nozzle
Stops in Retention Ring
Retention Ring
Electrode Clamp
Electrode Bracket
Electrode Insulator
Electrode Extension Rods
SK9666A
Bulkhead Fitting
Nozzle Line
Throttle Ring
Throttle Cup
SK9666A
Professional Maintenance
Check/Adjust Electrodes
•
Check the electrode tip settings, as shown in Fig-
ure 7. If necessary, adjust by loosening the electrode clamp screw (Figure 8) and slide/rotate the
electrodes as necessary. When the adjustment is
complete, securely tighten the clamp screw.
•
Check Retention Head Alignment and Cad
Cell Sighting (Refer to Figure 9.)
The cad cell sighting holes in both the throttle cup
and the retention head must be aligned to allow the
cad cell to detect the fl ame. Make sure the stamped
key in the retention head collar lines up with the
keyway in the nozzle adapter when mounting the
retention head.
NOTICE
The NX burner has a reduced diameter air tube,
precision-designed air throttle cup and combustion head for improved performance. This design provides very accurate control of the air/fuel
ratio, but the light reaching the cad cell through
small holes in these components is limited. Be-
cause of this, the average cad cell resistance
may be higher than conventional burners
with larger openings.
If the zero calibration has not been set, perform the
following procedure:
Install the nozzle line, with the adjustment plate
1.
assembly attached, into the burner.
Install and tighten the rear door to hold the air
2.
adjustment plate assembly in position.
Slightly loosen the upper acorn nut, the splined
3.
nut, and the lower acorn nut.
Turn the air adjustment screw clockwise to adjust
4.
the plate with the pointer to the zero position.
Referring to Figure 8, slide the nozzle line as-
5.
sembly forward until the retention head engages
the fi xed stops in the retention ring at the end of
the air tube.
Tighten the upper acorn nut securely.
6.
The rear door must be kept tightly closed. The
7.
adjustment screw may now be turned to adjust
the head/air setting.
Turn the adjusting screw to a setting ½ number
8.
lower than the proper set point as indicated in
Table 1. Then turn the adjusting screw counterclockwise to the proper setting.
Check/Adjust “Zero” Calibration
•
On burners with factory-installed air tubes, the
zero calibration has been factory set. Make sure
the retention head (Figure 8) is securely against
the stops in the retention ring when the adjustment
plate pointer is at “0” (Figure 5).
Figure 9 – Retention Head/Throttle Cup Alignment
Tighten the splined nut and lower acorn nut after
9.
the head/air setting has been adjusted.
SK9665
Page 16 WM 550-141-996/1105
RWB 6104WMNX R1005
Blower Wheel Replacement
•
For installation or replacement of a blower wheel,
insure that there is a space between the blower
wheel and the motor face of 0.115”. Refer to Figure
10.
Figure 10. – Blower wheel assembly
SK9670
Professional Maintenance
WM 550-141-996/1105 Page 17
RWB 6104WMNX R1005
Professional Maintenance
Replacement Parts Diagram
SK9804B
SK967102
SK9803B
For best performance specify genuine Beckett replacement parts
Page 18 WM 550-141-996/1105
RWB 6104WMNX R1005
Part Number designations for Replacement Parts Dia-
grams on Page 18.
Professional Maintenance
Item Description Part No.
1 Head/Air adjustment mecha-
nism assembly
2 Air guide 101101U
3 Gasket, mounting fl ange (not
shown)
4 Air tube combination,
(Includes Screws, air tube
mounting #8 x 3/8)
5 Blower wheel 2999U
6 Connector tube assembly, 11” 51127
7 Coupling 2454
8 Door, rear access 32119U
9 Electrode insulator kit 51811U
10 CleanCut Fuel Pump,
(Requires Mounting Screws ¼
-20 x 7/8”)
11a Gasket, igniter baseplate 51942U
11b Gasket, igniter baseplate hinge 51942U
11c Gasket, wiring 51942U
11d Gasket, rear access door 51942U
15 Igniter, electronic 51771U
16 Inlet air box 1010U
51794U
32389
Specify
4396
2184404U
4189
17 Inlet air louvers 1013U
19 Nozzle Line Electrode and
Head Assembly
20 PSC Motor,
(Requires Mounting screws ¼
-20 x 7/8”)
21 Primary control
R7184P Valve-on/Motor Delay
R7184P With Alarm Contacts
22 Retention head assembly,
6 -slot
23 Retention head assembly,
9 -slot
24 Splined nut 3666
25 Spring, igniter prop 32058U
26 Electrical box 5770
28 Cover, burner 32395U
29 Mounting plate, burner cover 32399U
30 Thumbscrews, cover mounting 21899U
31* Pressure Switch Kit, including
switch, (2) hoses & pressure
switch/cad cell lead
32* Air adapter w/Pressure Port &
Trim Plate
33* Parts kit, Including (2) hoses &
pressure switch/cad cell lead
* Denotes an optional part per burner specifi cation.
Specify
21805U
4189
7457U
7458U
51785U
51815U
21895U
5199OU
51988U
For best performance specify genuine
WM 550-141-996/1105 Page 19
RWB 6104WMNX R1005
Beckett replacement parts
Limited
WARRANTY
For Residential, Commercial and Specialty Burners
The R. W. BECKETT CORPORATION (“Beckett”) warrants to persons who purchase its Beckett burners from Beckett for resale or for
incorporation into a product for resale (“Customers”) that its equipment is free from defects in material and workmanship under normal use and
service for 60 months from the date of manufacture for Residential Burners and 18 months from the date of manufacture for Commercial and
Specialty Burners. Residential burner models include: AF, AFG, AFII, NX, SF, SR and SMG. Commercial burner models include: CF375,
CF500, CF800, CF1400, CF2300A, CF2500, CF3500A, CG10, CG15, CG25 and CG50. Specialty burner models include: ADC, ADCP, ARV,
SDC and SM. The provisions of this warranty are extended to individual major burner components as follows:
a) 60 months from date of manufacture for all Beckett-branded major components, except for 12 Vdc components.
b) 18 months from date of manufacture for all non-Beckett-branded major components and Beckett branded 12 Vdc components.
Note: Normal service items found to be defective upon receipt by the customer are covered by this warranty.
THIS WARRANTY DOES NOT EXTEND TO EQUIPMENT SUBJECTED TO MISUSE, NEGLECT, OR ACCIDENT: NOR DOES THIS WARRANTY APPLY
UNLESS THE PRODUCT COVERED BY IT IS PROPERLY INSTALLED BY A QUALIFIED, COMPETENT TECHNICIAN, WHO IS LICENSED WHERE
STATE AND LOCAL CODES REQUIRE, AND WHO IS EXPERIENCED IN MAKING SUCH INSTALLATIONS, IN ACCORDANCE WITH THE LATEST
EDITION OF NFPA NO. 31 OF THE NATIONAL FIRE PROTECTION ASSOCIATION, THE LATEST EDITION OF THE NATIONAL FUEL GAS CODE (NFPA
NO. 54) AND IN ACCORDANCE WITH ALL APPLICABLE LOCAL, STATE AND NATIONAL CODES HAVING JURISDICTIONAL AUTHORITY.
Equipment, which is defective in material or workmanship and within the warranty period, may be returned for credit as follows:
Beckett Burners, Beckett-branded major components and non-Beckett-branded major components that came as original equipment on a Beckett burner
or were sold as a replacement part by Beckett should be returned, freight prepaid, to Beckett’s home office. Credit will be issued to the customer unless
the returned equipment is determined by Beckett to be out of warranty or damaged by user, in which case the equipment will be scrapped.
Note: Beckett is not responsible for any labor cost for removal and replacement of equipment.
THIS WARRANTY IS LIMITED TO THE PRECISE TERMS SET FORTH ABOVE, AND PROVIDES EXCLUSIVE REMEDIES EXPRESSLY IN LIEU OF ALL OTHER
REMEDIES, AND IN PARTICULAR THERE SHALL BE EXCLUDED THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. IN NO EVENT WILL BECKETT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGE OF ANY NATURE.
authorizes any person to assume for Beckett any other liability or obligation in connection with the sale of this equipment, Beckett’s liability and Customer’s
exclusive remedy being limited to credit as set forth above.
Beckett neither assumes nor
R.W. BECKETT CORPORATION
P.O. Box 1289 Elyria, Ohio 44036
The Oilheat Manufacturers’ Association supports the use of low sulfur fuels as defi ned by ASTM D396, Grades No. 1 Low Sulfur
and No. 2 Low Sulfur, as the preferred heating fuel for the following reasons:
• Low sulfur fuels reduce deposits on heat exchanger surfaces, extending the service interval between cleanings.
• The reduced deposits increase the effi ciency of the appliance.
• Low sulfur fuels reduce particulate emissions.
• Low sulfur fuels reduce oxides of nitrogen emissions.
Form No. 61545 R72905
R.W. BECKETT CORPORATION
U.S.A.: P.O. Box 1289 · Elyria, Ohio 44036
www.beckettcorp.com
Canada: R.W. Beckett Canada, Ltd. · Unit #3, 430 Laird Road · Guelph, Ontario N1G 3X7
Form Number 6104WMNX R1005
Printed in U.S.A. © 2005 R.W. Beckett Corporation
Page 20 WM 550-141-996/1105
RWB 6104WMNX R1005
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