Beckett Nx User manual

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Oil Fired Water Boiler

Model urner

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iii i

Potential for Fire, Smoke and Asphyxiation Hazards

incorrect installation, adjustment, or misuse of this burner could result in death, severe

personal injury, or substantial property damage.

To the Homeowner or Equipment Owner:

• Please read and carefully follow all instructions

provided in this manual regarding your responsi-

bilities in caring for your heating equipment.

• Contact a professional, qualified service agency

for installation, start-up or service work.

To the Professional, Qualified Installer or

Service Agency:

• Please read and carefully follow all instructions

provided in this manual before installing, starting,

or servicing this burner or heating system.

• The Installation must be made in accordance with

all state and local codes having jurisdiction.

:....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

WM 550-141-996/806 Page 1

Table of Contents

General information

Hazard Definitions ........................................................................................................................................ 3

Owner's Responsibility ................................................................................................................................ 3

1[ information To Be Used On,y By Qualified Service Technicians II

Weil=McLain Burner Specifications ...........................................................................................................4

NX Burner Specifications for Weil=McLain Ultra Oil Burners ........................................................................ 4

General information .........................................................................................................................................s

General information ............................................................................................................................. 5

Certificationslapprovals ................................................................................................................................... 5

Notice Special Requirements ........................................................................................................................... 5

inspect/Prepare Installation Site .................................................................................................................s

Clearances to Burner and Appliance ............................................................................................................... 5

inspect Chimney or Direct Vent System ......................................................................................................... 5

Combustion Air Supply ..................................................................................................................................... 5

Safety Shutoff for Direct Vent System ............................................................................................................. 6

DirectlSidewall Venting Application ................................................................................................................ 6

Fuel Line installation ......................................................................................................................................... 6

Fuel Line Valves and Filters ............................................................................................................................. 6

Prepare the Burner ........................................................................................................................................... 7

General ......................................................................................................................................................... 7

Mount Burner on Appliance ............................................................................................................................. 7

Connect Fuel Lines ........................................................................................................................................... 7

Wiring Connection Diagram ............................................................................................................................. 7

Start the Burner and Set Combustion ......................................................................................................9

Start=up and Initial Settings .............................................................................................................................. 9

Set Combustion with Test instruments ......................................................................................................... 10

Cover Installation ............................................................................................................................................ 11

Trained Service Technician's Regular Maintenance .........................................................................11

Removing Nozzle Line for Service ................................................................................................................. 12

Nozzle Installation ........................................................................................................................................... 12

Check/Adjust Electrodes ................................................................................................................................ 13

Check Retention Head Alignment and Cad Cell Sighting ............................................................................ 13

Check/Adjust "Zero" Calibration ................................................................................................................... 13

Blower Wheel Replacement ........................................................................................................................... 14

Replacement Parts Diagram .................................................................................................................. 14/15

Replacement Parts Diagram ...................................................................................................................... 14/15

Replacement Parts List ................................................................................................................................... 15

Beckett Limited Warranty information ...................................................................................................16

Page 2 RWB 6104 WMNX

Genera| information

Genera| Information

To the Owner:

Thank you for purchasing aBeckett NX burner

for use with your heating appliance. Please pay atten-

tion to the Safety Warnings contained within this in-

struction manual. Keep this manual for your records

and provide it to your qualified service agency for use

in professionally setting up and maintaining your NX

burner

Your NX burner will provide years of efficient operation

if it is professionally installed and maintained by a quali-

fied service technician. If at any time the burner does

not appear to be operating properly, immediatel cv_cAn-

_ualified service ae_teBAy_for consultation.

We recommend annual inspection/service of your

oil heating system by a qualified service agency.

,Hazard Definitions

Indicates an imminently haz-

ardous situation, which, if not

avoided, will result in death, serious injury, or

property damage.

Indicates apotentially

hazardous situation, which,

if not avoided, could result in death, severe

personal injury, and/or substantial property

damage.

Indicates a potentially haz-

CAUTION ardous situation, which, if

not avoided, may result in personal injury or

property damage.

Within the boundaries of the hazard warning,

there will be information presented describing

consequences if the warning is not heeded and

instructions on how to avoid the hazard.

.o,L2222J

Intended to bring special attention to information, but not

related to personal injury or property damage.

RWB 6104 WMNX

Owner's Responsibility

incorrect installation, adjustment,

and use of this burner could result in

severe personal injury, death, or sub-

stantial property damage from fire,

carbon monoxide poisoning, soot or explosion.

Contact a professional, qualified service agency for the

installation, adjustment and service of your oil heating

system. This work requires technical training, trade ex-

perience, licensing or certification in some states and the

proper use of special combustion test instruments.

Please carefully read and comply with the following in-

structions:

• Never store or use gasoline or other flammable

liquids or vapors 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 burn any fuel not specified and

approved for use in this burner.

• Never restrict the air inlet openings to the burner

or the combustion air ventilation openings in the

room.

Professional Service

Required

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 explo-

sion.

Please read and understand the manual supplied with

this equipment. This equipment must be installed, adjust-

ed and put into operation only by a qualified individual or

service agency that is:

• Licensed or certified to install and provide technical

service to oil heating systems.

• Experienced with all applicable codes, standards and

ordinances.

• Responsible for the correct installation and commis-

sion of this equipment.

• Skilled in the adjustment of oil burners using combus-

tion test instruments.

The installation must strictly comply with all applicable

codes, authorities having jurisdiction and the latest revi-

sion 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.

Page 3

WeiloMcLain 5urner Specifications

• NX Burner Specifications for Well=

McLain Ultra Oil Boilers

Verify that burner specification number (on burner carton)

and configuration agrees with information below.

The table below provides burner specifications and start-

ing air settings for NX burners applied to WeiI-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.

The remainder of this manual contains Infor-

mation to be used ONLY by aqualified Service

Technician.

Table 1. Burner Configurations

Boiler Burner Spec Firing Air Tube insertion Primary Alternate Fuel Pump Head/Air

Model Rate Combina- Nozzle Nozzle Pressure Adjustment

(GPH) tion (psig) Plate Setting

UO-3CV WL5703 0.80 NX70LC 1-3/4" 0.65X 60°A 0.65X 70°B 150 1.75

(SeeNote1) Delavan Hago

UO-3CV WL5703 1.00 NX70LC 1-3/4" 0.75X 60°B 0.75X 60°B 175 2.50

Hago Delavan

UO-4CV WL5704 1.20 NXg0LB 3-1/2" 1.00X 70°B 1.00X70°B 140 4.00

Hago Delavan

UO=5CV WL5705 1.40 NXg0LD 3=1/2" 1.10X 70°B 1.10X70°B 160 1.50

Hago Delavan

UO-3DV WL5803 0.80 NX70LC 1-3/4" 0.65X 60°A 0.65X 70°B 150 1.75

(SeeNotes1& 2) Delavan Hago

UO=3DV WL5803 1.00 NX70LC 1-3/4" 0.75X 60°B 0.75X 60°B 175 2.50

(SeeNote 2) Hago Delavan

UO-4DV WL5804 1.20 NXg0LB 3-1/2" 0.85X 60°W 0.85X 60°W 190 4.00

(SeeNote 2) Delavan Hago

UO-5DV WL5805 1.40 NXg0LD 3=1/2" 1.10X 70°B 1.10X 70°B 160 1.50

(SeeNote 2) Hago Delavan

1) Shipped as 1.0 GPH Burner Configuration. 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 floor. (See Maintenance Section

for Nozzle Replacement details.)

2) Direct Vent Boilers require that a combustion chamber blanket be installed (blanket supplied with burner).

Figure 1. Burner label location

Page 4

0enero} mode}-

Information

Serial number, --

including dote code

Rating Information-

Approval agency --

symbols

Primary group --

and fuel oil

Model " NX"

Series 0il Burner

_JAL _UMBER

000405-62756

Illlltllllllllll!lfllE

C _-_ US USTED

o_ _n_ _o pHOOOOl

R.W,Beckett Carp,

i. _ usa

MFR'S SETTINGS

"_%........

XX0000 R00

000405-62736

-- R.W. Beckett

manufacturer's settings

-- R.W. Beckett specification

number and revision

Can be customized by

individual specification

SK9675

RWB 6104 WMNX

Genera| information

General information

Table 2. - Burner Specifications

Capacity Firing rate: 0.40-1.35GPH

LB & LC Input: 56,000- 189,000 Btu

Capacity Firing rate: 1.10 - 1.75GPH

LD & LF 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: 120VAC, 60 Hz, single phase

Operating load: 5.8Amps max

Motor: 1/7hp, 3450 rpm, NEMA48M

frame PSC rotation CCW

when facing shaft end

Ignition: Continuous duty solid-state igniter

Fuelpump Outlet pressure ......Note 1

Air tube ATC code .......See Table3

Dimensions Height (maximum): 12-1/2 inches

(with cover) Width (maximum): 15 inches

Depth: 9-1/4 inches

Air tube diameter: 3-1/4 inches

*Note 1. See appliance manufacturer's burner specifications for

recommended outlet pressure.

Table 3. - Air Tube Combinations (ATC)

Firing rate Head ATC codes for usable air tube

(gph) lengths:

(min-max) 5" 7" 9"

0.40-1.35 9-Stot NX50LB NX70LB NX90LB

0.40-1.35 6-Slot NX50LC NX70LC NX90LC

1.10-1.75 9-Stot NX50LD NX70LD NX90LD

1.10-1.75 6-Slot NX50LF NX70LF NX90LF

•Certifications/approvals

Underwriters Laboratories has certified this burner

to comply with ANSI/UL 296 and has listed it for

use with #1 or #2 fuel oil as specified in ASTM

D396. Low sulfur #1 and #2 fuel oils reduce heat

exchanger deposits with aft 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 weft. The Oilheat Manufacturers' Association

recommends these fuels as the preferred fuels for

this burner.

RWB 6104 WMNX

• Notice Special Requirements

For recommended installation practice in Canada,

refer to the latest version of CSA Standard B139 &

B140.

Concealed damage -- If you discover damage to

the burner or controls during unpacking, notify the

carrier at once and file the appropriate claim. When

contacting Beckett for service information -- Please

record the burner serial number (and have avail-

able when calling or writing). You will find the serial

number on the silver label located on the left rear of

the burner. Refer to Figure 1.

inspect/Prepare installation Site

• Clearances to Burner and Appliance

Provide space around burner and appliance for

ease of service and maintenance. Check the mini-

mum clearances against those shown by the ap-

pliance manufacturer and by applicable building

codes.

• inspect Chimney or Direct Vent System

Adequate Combustion

and Ventilation Air Supply

Required

Failure to provide adequate air supply could se-

riously affect the burner performance and result

in damage to the equipment, asphyxiation, ex=

plosion or fire hazards.

• The burner cannot properly burn the fuel if it is not

supplied with a reliable combustion air source.

• Follow the guidelines in the latest editions of the

NFPA 31 and CSA-B139 regarding providing ad-

equate air for combustion and ventilation.

Inspect the chimney or vent. Make sure it is prop=

erly sized and in good working condition. Follow the

instructions supplied by the appliance manufactur-

er.

Combustion Air Supply information

See NFPA Standard 31 for complete details. Appli-

ances located in confined spaces: All confined

spaces should have two (2) permanent openings;

one near the top of the enclosure and 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 open-

ings should have free access to the building inte-

rior, which should have adequate infiltration from

the outside. Page 5

Exhaustfansandotherair-usingdevices:Size

airopeningslargeenough 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 flue safety shut off system,

refer to Figure 2, shuts down the burner if the ex-

haust flue is blocked and/or ifthe air inlet is blocked.

It recognizes a blocked flue 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

flue or blocked combustion air inlet per CSA Stan-

dard B140.0. It is designed to interrupt the cad cell

circuit and allow the control to shut down the burn-

er.

• Direct/Sidewall Venting Application

Connect Outside Air Duct

to NX Adapter

to install adapter properly

could result in impaired combustion,

appliance soot=up, puffback of smoke,

and fire or asphyxiation hazards.

•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 air adapter and instructions pro-

vided.

•Abundant fresh air is required for proper combus-

tion.

For direct vent installations, follow instructions pro-

vided with appliance and direct vent system. Out-

side combustion air is required for direct venting.

Failure

Inspect/Prepare installation Site

When installing an NX outside air adapter (Beckett

Part Number 52018U), refer to the instruction sheet

supplied with the adapter. This kit allows combus-

tion air to be piped directly to the burner. The NX

outside air adapter kit may also be used for chim-

ney vent applications that require outside combus-

tion air.

• Fuel Line installation

CAUTION Do Not Use Teflon Tape

Damage to the pump could cause impaired burn=

er operation, oil leakage and appliance soot=up.

• Never use Teflon tape on fuel oil fittings.

• Tape fragments can lodge in fuel line components

and fuel unit, damaging the equipment and pre-

venting proper operation.

• Use oil-resistant pipe sealant compounds.

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

flare fittings. Never use compression fittings.

Always install fittings in accessible locations. To

avoid vibration noise, fuel lines should not run

against the appliance or ceiling joists.

• Fuel Line Valves and Filter

To further protect the fuel supply system and reduce noz-

zle orifice plugging with firing rates below 0.75 gph, a dual

filtration system can be installed. This typically consists of

a 50 micron primary filter, located near the fuel tank and a

secondary filter rated for at least 10 microns located near

the burner.

Figure 2. Pressure Switch Installation TUBE, .25 ID X 15"LONG =

TRIM PLATE Z

MOD. AIR

INLETADAPTER j

PRESSURE

SENSING PORT

-PRESSURE

SENSING TUBE

AIR TUBE WITH

PRESSURE PORT

TUBE

PRESSURE SWITCH /

CAD C CAD CELL LEAD

Page 6 RWB 6104 WMNX

Inspect/Prepare |nstallation Site

Install two oil duty rated, thermally-operated, spring-

loaded shutoff valves in accessible locations on the

oil supply line to comply with the NFPA31 Standard.

Locate one close to the tank and the other close to

the burner, upstream of the filter.

Also install a generous capacity filter, rated for 50

microns or less, inside the building between the

fuel tank shutoff valve and the burner. Locate both

the filter and the valve close to the burner for ease

of servicing.

Prepare the Burner

• General

In most cases, the burner is ready to mount to the

appliance. There can be situations where the burn-

er needs to be reconfigured to perform properly in

the appliance. Review the appliance manufactur-

er's specifications prior to installing to determine if

any modification is required to properly configure

the burner.

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 flange.

Note that the end of the tube will extend into the

chamber on UO-4 and UO=5 boilers.

•Connect Fuel Lines

Do Not Install By=pass Plug

with 1=Pipe System

Failure to comply could cause immediate pump

seal failure, pressurized oil leakage and the po=

tential for a fire and injury hazard.

• The burner is shipped without the by-pass plug in-

stalled.

• Install the by-pass plug in two-pipe oil supply systems

ONLY.

zACAUT|ON Oil Supply Pressure

Din, Control Required

Damage to the filter or pump seals could cause

oil leakage and a fire hazard.

• The oil supply inlet pressure to the burner cannot

exceed 3 psig.

• Insure that a pressure limiting device is installed

in accordance with the latest edition of NFPA 31.

• Do NOT install valves in the return line.

• Gravity Feed Systems: Always install an anit-

siphon valve in the oil supply line or a solenoid

valve (RWB Part # 2182602U)in the pump/noz-

zle discharge tubing to provide backup oil flow

cut-off protection.

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 pro-

vided with the pump for installation specifications.

When installing a one-pipe system, connect the

inlet line to the pump inlet. The fuel pump may be

installed with gravity feed or lift. The maximum al-

lowable lift for a single pipe installation is 8 ft.

When installing a two=pipe system, remove the

1/16" pipe by-pass plug from plastic bag attached

to fuel unit. Remove 1/4" plug from return port.

Insert and tighten the by-pass plug. Attach return

and inlet lines. The return line should terminate ap-

proximately 3-4" above supply line inlet. Failure to

do this may introduce air into the system and could

result in loss of prime.

Wiring Connections Diagram

Refer to the appliance manufacturer's wiring dia-

gram prior to connecting the burner wiring. All wir-

ing must be in accordance with the latest revision 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 3, requires

a constant 120 volt AC power source supplied to

the black wire on the control. (Referring to Figure 4

and the appliance manufacturer's instructions.) The

red wire goes to the appliance limit circuit. Please

note that other control manufacturers may use dif-

ferent wire colors for power and limit connections.

RWB 6104 WMNX Page 7

Start the Burner and Set Combustion

Figure 3.- Typical Burner Wiring for R7184 Control.

Refer to the appliance manufacturer's wiring diagram for actual specifications.

120 VAC BURNER

START WIRE

FROM APPLIANCE

(FROM LIMIT CIRCUIT)

120 VAC

FROM

APPLIANCE

EQUIPMENT

GROUND

L1 (HOT)

L2 NEUTRA

r,,

.=_GROUND

SCREW

RED

BLACK

m m_

WHITE--

WHITE _<

WHITE

VIOLET ¢

BLUE /

WHITE STRIPE

ORANGE

YELLOW

BURNER JUNCTION BOX

R7184

LIMIT SERIES

PRIMARY

LI CONTROL

L2 --'

2 G

VALVE 3 T_(_z-_ [

IGNITION "_

MOTOR

CAD : I--_: :

CELL

CAD

CELL

TO OTHER

ENVIRACOM TM

ENABLED

DEVICES

F--A--q

---F_'J I 24 VAC

THERMOSTAT

TO REMOTE

LOW VOLTAGE

AC ALARM

CIRCUIT

(IF USED)

SK9359D

_ = 120 VAC FIELD WIRING

-120 VAC FACTORY WIRING = LOW VOLTAGE FIELD WIRING

- LOW VOLTAGE FACTORY WIRING = WIRE WITH 1/4"

QUICK CONNECT

RECEPTACLE

Burner Sequence of Operation for R7184

Control.

1. STANDBY. The burner is idle, waiting for a call for

heat. When a call for heat is initiated, there is a 3-

10 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 flame should be established within the

15 second lockout time.

4. LOCKOUT. If flame 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 flame is estab-

lished, the ignition remains on for 10 seconds to

ensure flame 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 sat-

isfied. 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 flame is lost while the burner is

firing, the control shuts down the burner, enters a 60

second recycle delay, and then repeats the above

ignition sequence. If flame is lost three times in a

row, the control locks out to prevent cycling with

repetitious flame 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 re-

turns the burner to standby.

STANDBY

VALVE-ON

DELAY LOCKOUT

MOTOR-

OFF DELAY

TRIALFOR

IGNITION

GNaTON

CARRYOVER

_RUN )RECYCLE I

61351

Page 8 RWB 6104 WMNX

Figure 4. -Burner Connections. E×plosion and Fire Hazard

#'o_r'Cord SK9806

Start the Burner and Set Combustion

• Start=up and initial Settings

1. Open the shutoff valves in the oil supply line to

the burner.

.Referencing Figure 5, verify and/or set the Head/

Air Adjustment Pointer to the value specified

by the Appliance Manufacturer. Refer to Table

1. (This is an initial air setting for the pump

bleeding procedure only.) Calibrated test in-

struments must be used for the final head/air ad-

justment.

Figure 5. Head/air Adjustment Plate Assembly

I F,

Pointer

Zero Setting

Locking Nut

Adjustment _

Screw Am52000

.Adjust the thermostat or temperature controller

to call for heat. (Note: return controller(s) to the

original settings upon completion of burner instal-

lation or service.)

.Close the line voltage switch to start the burner. 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.

Failure to follow these instructions

could lead to equipment malfunc-

tion and result in heavy smoke

emission, soot=up, hot gas puff-

back, fire and asphyxiation hazards.

•Do not attempt to start the burner when excess oil

has accumulated in the appliance, the appliance

is full of vapor, or when the combustion chamber

is very hot.

•Do not attempt to re-establish flame with the

burner running if the flame becomes extinguished

during start-up, venting, or adjustment.

•Vapor-Filled Ap_pliance: Allow the unit to cool off

and all vapors to dissipate before attempting an-

other start.

• Oil-Flooded Appliance: Shut off the electrical

power and the oil supply to the burner and then

clear all accumulated oil before continuing.

•If the condition still appears unsafe, contact the

Fire Department. Carefully follow their directions.

- Keep a fire extinguisher nearby and ready for

use.

Prepare for combustion tests by drilling a 1/4"

sampling hole in the flue pipe between the appli-

ance and the barometric draft regulator. Seal this

hole when testing is complete. (See appliance

manufacturer's instructions for location.)

Check/Adjust the Zero Calibration for the Head/

Air Adjustment Mechanism. Refer to Figure 5.

a. Slightly loosen the zero setting locking nut.

b. Turn the adjustment screw until the reading is

set to zero. (Mid-point of pointer should line

up with zero.

c. Turn the adjustment screw counterclockwise

to adjust the plate with the pointer to the zero

position.

d. Slide the nozzle line assembly forward until

the retention head engages the fixed stops in

the retention ring at the end of the air tube.

Refer to Figure 6.

e. Tighten the zero setting locking nut.

f. The rear door must be closed. The adjustment

screw may now be turned clockwise to adjust

the head/air setting.

g. Turn the adjusting screw to a setting 1/2 num-

ber lower than the proper setpoint as indicat-

ed in Tables 1. Then turn the adjusting screw

counterclockwise to the proper setting.

h. Tighten the locking nut after the head/air set-

ting has been adjusted.

5. Bleed the air from the fuel pump as soon as the

burner motor begins rotating.

RWB 6104 WMNX Page 9

Start Burner and Set Combustion

Figure 6. -Nozzle LinelHeadlAir Tube Assembly (Lowfiring rate shown.)

Retention Head

Support Legs

Electrode Clamp

Electrode Bracket

Electrode Insulator

Nozzle Adapter

Nozzle

Stops in Retention Ring

/-Electrode Extension Rods

SK9666A

Cup \ Nozzle Line

Ring

Throttle Cup Hub

Retention Ring

• Set Combustion with Test Instruments

1. Allow the burner to run for approximately 5 to 10

minutes.

2. Set the stack or over-fire draft to the level speci-

fied by the appliance manufacturer.

, Natural Draft Applications; typically over=fire

draft is -0.01" or -0.02" w.c.

• Direct Venting; typically may not require draft

adjustment.

•High Efficiency/Positive Pressure Appliances;

also vary from traditional appliances (see manu-

facturer's recommendations).

.Follow these five steps to properly adjust the

burner:

Step 1: Adjust the head/air until a trace of smoke

is achieved. This can be accomplished by turn-

ing the screw on the head/air adjustment plate

assembly to increase air (CCW) or decrease air

(CW).

The NX burner has a reduced diameter air tube, preci-

sion-designed air throttle cup and combustion head for

improved performance. This design provides very accu-

rate control of the air/fuel ratio, but the light reaching the

cad cell through small holes in these components is lim-

ited. Because of this, the average cad cell resistance

may be higher than conventional burners with larger

openings.

Step 2: At the trace of smoke level, measure the

CO2 (or 02). This is the vital reference point for

further adjustments. Example: 13.5% CO2 (2.6%

02)

Step 3: Increase the air to reduce the CO2 by 1.5

to 2 percentage points. (02 will be increased by

approximately 2.0 to 2.7 percentage points.) Ex-

ample: Reduce CO2 from 13.5% to 11.5% (2.6%

to 5.3% 02).

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.

Step 5" Once the combustion has been set, tighten

the lower acorn nut and splined nut on the air ad-

justment assembly. See Figure 5.

.Chimney Vent Systems: Install the burner cover

and repeat Steps 2 and 4 above. If CO2 increas-

es (02 decreases), remove the cover and adjust

the air setting so the CO2 (02) with the cover

installed meets the requirements of Step 3.

5. Direct Vent Systems with outside air ducted to

burner: Install the burner cover.

.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 manufactur-

er's specifications.

Page 10 RWB6104WMNX

Trained Service Technician's Regu|ar Maintenance

• Cover installation

1. Install the four cover mounting thumb screws in

the cover mounting plate.

2. Install the cover over the mounting plate while

aligning the side slots with the installed cover

mounting screws.

Figure 7. - Burner Cover

SK9804A

Trained Service Technician's Regular

Maintenance

Professional Service

Required

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 explo-

sion.

Please read and understand the manual supplied with

this equipment. This equipment must be installed, adjust-

ed and put into operation only by a qualified individual or

service agency that is:

•Licensed or certified to install and provide technical

service to oil heating systems.

• Experienced with all applicable codes, standards and

ordinances.

• Responsible for the correct installation and commis-

sion of this equipment.

• Skilled in the adjustment ofoil burners using combus-

tion test instruments.

The installation must strictly comply with all applicable

codes, authorities having jurisdiction and the latest revi-

sion 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.

RWB 6104 WMNX

The following guidelines are provided for routine main-

tenance.

I:3 Replace the oil supply line filter. The line filter car-

tridge must be replaced to avoid contamination of

the fuel pump and nozzle.

I:3 Inspect the oil supply system. All fittings should be

tight and leak=free. The supply lines should be free

of water, sludge and other restrictions.

I:3 Remove and clean the pump strainer if applica-

ble.

I:3 Replace the used nozzle with a new nozzle that

conforms to the appliance manufacturer's specifi-

cations.

I:3 Clean and inspect the electrodes for damage, re-

placing any that are cracked or chipped.

CI Check electrode tip settings. Replace electrodes if

tips are rounded.

I:3 Inspect the igniter spring contacts.

CI Clean the cad cell lens surface, if necessary.

I:3 Make sure Low Firing Rate Baffle is in place if re-

quired for the burner application. Omitting the baf-

fle can result in unacceptable burner combustion.

I:3 Inspect all gaskets. Replace any that are damaged

or would fail to seal adequately.

I:3 Clean the blower wheel, air inlet, air guide, reten-

tion head, throttle cup and throttle ring of any lint

or foreign material.

Do Not Puncture, Scratch,

or Remove Flame Sight-

ing Windows

if a window is punctured, signifi-

cantly scratched or removed from

the throttle cup, the burner perfor-

mance could be impaired, resulting in safety

lockout, appfiance soot-up, equipment damage,

hot gas puff=back and asphyxiation hazard.

•Use a clean soft cloth and degreaser, on an an-

nual basis, to remove any build-up or dark stains

from the windows.

•If damaged, replace the nozzle line assembly with

an assembly that has a windowed throttle cup.

[3 Use a clean soft cloth with adegreaser to

clean any accumulated soot or oil stains from

the throttle cup sight windows.

I:3 Check motor current. The amp draw should not

exceed the nameplate rating.

I:3 Check all wiring for secure connections or insula-

tion breaks.

I:3 Check the pump pressure and cutoff function.

I:3 Check primary control safety lockout timing.

I:3 Check ignition system for proper operation.

I:3 Inspect and clear the vent system and chimney of

any soot accumulation or other restriction.

I:3 Clean the appliance thoroughly according to the

manufacturer's recommendations. Page 11

Trained Service Technician's Regular Maintenance

CI Check the burner performance. Refer to the sec- 8. To replace the nozzle assembly, reverse the

tion "Set combustion with test instruments", above procedure.

CI It is good practice to keep a record of the service

performed and the combustion test results. •Nozzle Installation

• Removing Nozzle Line for Service (Ref- Protect Nozzle from

erence the Replacement Parts Diagram.) CAUTION Damage

Correct Nozzle and Flow A damaged nozzle could cause impaired corn-

Rate Required

incorrect nozzles and flow rates

could result in impaired combus-

tion, under-firing, over-firing, soot=

ing, puff-back of hot gases, smoke

and potential fire or asphyxiation hazards.

Use only nozzles having the brand, flow rate (gph), spray

angle and pattern specified by the appliance manufactur-

er or Beckett Residential Burner OEM Spec Guide, Part

#6711.

bustion, sooting, puffback of hot gases, smoke,

oil leakage and potential fire or asphyxiation

hazards.

• Use care when handling, removing and installing oil

nozzles.

• Carefully follow the guidelines provided in this sec-

tion.

Perform the following steps when replacing a noz-

zle.

Follow the appliance manufacturer's specifications for the

required pump outlet pressure for the nozzle, since this

affects the flow rate.

• Nozzle manufacturers calibrate nozzle flow rates

at 100 psig.

• This burner utilizes pressures higher than 100

psig, so the actual nozzle flow rate will be greater

than the gph stamped on the nozzle body. (Exam-

ple:A 1.00 gph nozzle @ 140 psig = 1.18 gph)

For typical nozzle flow rates at various pressures see ac-

companying chart.

Remove the nozzle line assembly to gain access

to the nozzle.

Use a 3/4" open-end wrench to hold the nozzle

adapter. DO NOT attempt to remove or replace

the nozzle without securing the adapter, as noz-

zle alignment could be seriously affected.

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.

Page 1

Before proceeding, turn offthe main power switch

to the burner.

Remove the burner cover by loosening the four

thumb screws (two on each side of burner).

Disconnect the copper connector tube assembly

from the nozzle line bulkhead fitting.

Loosen the two screws securing the igniter re-

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.

Swing the door to the right and down.

Loosen the splined nut.

Remove the nozzle line electrode and head as-

sembly from the burner by drawing it straight

back and out the rear door opening. The adjust-

ment mechanism is still attached. Be careful not

to damage the electrodes or insulators while han-

dling.

4. Use a 5/8" open-end wrench to carefully remove

the existing nozzle.

.Inspect the nozzle adapter before installing the

new nozzle. If it is grooved or scratched on the

sealing surface, replace the nozzle line assem-

bly. If the surface is damaged, oil could leak at

the nozzle to adapter joint, causing serious com-

bustion problems.

6. Protect the nozzle orifice and strainer when in-

stalling. If the orifice gets dirt in it or is scratched,

the nozzle will not function properly.

.To install a new nozzle, place a 3/4" open-end

wrench on the nozzle adapter. Insert the nozzle

into the adapter and secure finger tight. Finish

tightening with a 5/8" open-end wrench. Use care

to avoid bending the burner head support legs or

electrodes.

.Do not over-torque the nozzle when install-

ing. This will cause deep grooves in the nozzle

adapter, preventing a seal when a new nozzle is

installed.

RWB 6104 WMNX

Trained Service Technician's Regular Maintenance

Nozzle Flow Rate by Size

Nozzle flow rate U. S. gallons per hour of No. 2fuel oil when

pump pressure (psig) is:

Nozzle 125 140 psi 150 175 200

psi (factory psi psi psi

std.)

size

(rated

at 10O

psig)

0.40 0.45 0.47 0.49 0.53 0.56

0.50 0.56 0.59 0.61 0.66 0.71

0.60 0.67 0.71 0.74 0.79 0.85

0.65 0.73 0.77 0.80 0.86 0.92

0.75 0.84 0.89 0.92 0.99 1.06

0.85 0.95 1.01 1.04 1.13 1.20

0.90 1.01 1.07 1.10 1.19 1.27

1.00 1.12 1.18 1.23 1.32 1.41

1.10 1.23 1.30 1.35 1.46 1.56

1.20 1.34 1.42 1.47 1.59 1.70

1.25 1.39 1.48 1.53 1.65 1.77

1.35 1.51 1.60 1.65 1.79

1.50 1.68 1.77 1.84

1.65 1.84

1.75

9. Carefully check and realign the electrode tips af-

ter replacing a nozzle, ensuring the electrode set-

tings comply with Figure 8.

Note that if the throttle cup is moved be sure to re-

position it with no gap between the nozzle adapter

and hub.

• Check Retention Head Alignment and

Cad Cell Sighting (Refer to Figure 8.)

The cad cell sighting holes in the throttle cup and

the retention head must be aligned to allow the cad

cell to detect the flame. Make sure the stamped key

in the retention head collar lines up with the keyway

in the nozzle adapter when mounting the retention

head. Note that in specific applications, the reten-

tion head may not have a sighting hole.

•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).

If the zero calibration has not been set, perform the

following procedure:

1. Install the nozzle line, with the adjustment plate

assembly attached, into the burner.

2. Install and tighten the rear door to hold the air

adjustment plate assembly in position.

10. If the head was removed when replacing the noz-

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 6.

•Check/Adjust Electrodes

Check the electrode tip settings, as shown in Fig-

ure 7. If necessary, adjust by loosening the elec-

trode clamp screw (Figure 8) and slide/rotate the

electrodes as necessary. When the adjustment is

complete, securely tighten the clamp screw.

Figure 8.- Electrode tip gap and spacing

5/32" GAP

SK9664

RWB 6104 WMNX

1/4" above [

nozzle center _/_

-'t _3132"Nozzle-to-tip

Spacing

Slightly loosen the upper acorn nut, the splined

nut, and the lower acorn nut.

Turn the air adjustment screw clockwise to adjust

the plate with the pointer to the zero position.

Referring to Figure 8, slide the nozzle line as-

sembly forward until the retention head engages

the fixed stops in the retention ring at the end of

the air tube.

Tighten the upper acorn nut securely.

The rear door must be kept tightly closed. The

adjustment screw may now be turned to adjust

the head/air setting.

Turn the adjusting screw to a setting ½ number

lower than the proper set point as indicated in

Table 1. Then turn the adjusting screw counter-

clockwise to the proper setting.

Tighten the splined nut and lower acorn nut after

the head/air setting has been adjusted.

Page 13

Trained Service Technician's Regular Maintenance

Figure 9. - Retention Head/Throttle Cup Alignment

SIGHTING HOLE IN

THROTTLE CUP

SIGHTING HOLE IN

RETENTION HEAD

<:3

HEAD ALIGNMENT KEYWAY_

REAR VIEW SIDE VIEW FRONTVIEW

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 Fig-

ure 10.

Replacement Parts Diagram

For best performance specify genuine _:::__

Figure 10.- Blower wheel assembly

RULER OR

SCALE

STRAIGHT EDGE

- CROSS FACE OF

BLOWER WHEEL

' Jm

_ j _ 2-23/32"FACE

OF BLOWERWHEEL

TO MACHINED MOTOR

-- MOUNTSURFACE

.........................r''l"q-I........................

=_J _ 0.115"BACK OF

q__ BLOWERWHEEL TO

__ J CASTMOTORFACE

(W/FEELER GAUGES)

....!: .......... SK9670

replacement parts

30 i ÷

} l...... i ,: 0

I _ ' ' I

Page 14 RWB 6104 WMNX

Replacement Parts Diagram

For best performance specify genuine _::__ replacement parts

Item Description PartNo.

1 Head/Airadjustmentmechanism 52000U

assembly

2 Airguide 101101U

3 Gasket,mountingflange(notshown) 32389

4 Airtubecombination, Specify

(includesScrews,air tubemounting 4396

#8 x3/8)

5 Blowerwheel 2999U

6 Connectortubeassembly,11" 51127

7 Coupling 2454

8 Door,rearaccess 32119U

9 Electrodeinsulatorkit 51811U

10 CieanCutFuelPump, 2184404U

(RequiresMountingScrews1A-20x 4189

7f8")

11a Gasket,igniterbaseplate 51942U

11b Gasket,igniterbaseplatehinge 51942U

11c Gasket,wiring 51942U

11d Gasket,rearaccessdoor 51942U

15 Igniter,electronic 51771U

16 Inletair box 1010U

17 Inletair louvers 1013U

19 NozzleLineElectrodeand Head Specify

Assembly

RWB 6104 WMNX

20 PSCMotor, 21805U

R8equiresMountingscrews1A-20x 4189

21 Primarycontrol

R7184PValve-on/MotorDelay 7457U

R7184PWithAlarmContacts 7458U

22 Retentionheadassembly, 51785U

6 -slot

23 Retentionheadassembly, 51815U

9 -slot

24 Splinednut 3666

25 Spring,igniterprop 32058U

26 Electricalbox 5770

28 Cover,burner 32395U

29 Mountingplate,burnercover 32399U

30 Thumbscrews,covermounting 21899U

31" PressureSwitchKit,includingswitch, 21985U

(2)hoses& pressureswitch/cadceil

lead

32* Outsideairadapterw/PressurePort 52018U

33* Partskit,Including(2)hoses& pres- 51988U

sureswitch/cadcelllead

NXOutsideAir Kit;includesoutside 51990U

air adapter,vacuumreliefvalve&

intakeairhood

CombustionBlanket (Requiredffor3, 31489

4,and5 sectionDirectVentBoilers.)

* Denotes an optional part per burner specification.

Page 15

Limited Warranty Information

Limited

WARRANTY

For Residential, Commercial and Specialty Burners

The R. W. BECKETT CORPORATION ("Beckett") warrants to persons who purchase its Beckett burners from Beckett _r resale or _r

incorporation into a product _r resale ("Customers") that its equipment is fi'ee from defects in material and workmanship under normal use and

service t\_r 60 months from the date of manufacture t_r Residential Burners and 18 months from the date of manufacture _r Commercial and

Specialty Burners. Residential bz_rner models, inch_de: AF, AFG, AFII, NX, SF, SR and SMG. Commercial bz_rner models, ineh_de: CF375,

CF500, CFS00, CF1400, CF2300A, CF2500, CF3500A, CG10, CG15, CG25 and CG50. 3_eeia[ O bzcrner models' inch€de: ADC, ADCP, ARV,

SDC and SM. The provisions of this wmTanty are extended to individual major burner components as t\_llows:

a) 60 months from date of manut:acture £\_r all Beckett-branded major components, except £\_r 12 Vdc components.

b) 18 months from date of manufacture t\_r all non-Beckett-branded major components and Beckett branded 12 Vdc components.

Note: Normal ser',ice items t\_und to be defccti'_ e upon receipt by the customer are co'_ ered by this warranty.

THIS WARRANTY DOES NOT EXTEND TO EQUIPMENT SUBJECTED TO MIS[ SE, NEGLECT, OR ACCIDENT: NOR DOES THIS _2&RRANTY APPLY

UNLESS THE PRODUCT COVERED BY IT IS PROPERLY INSTALLED BY A QUALIFIED, COMPETENT TECHNICIAN, 'WHO IS LICENSED WHERE

STATE AND LOCAL CODES REQ[ IRE, 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 FILL GAS (:ODE (NFPA

NO. $4) AND IN ACCORDANCE WITH ALL APPLICABLE LOCAL, STATE :kND NATIONAL (;ODES HA_TNG 31TRISDICTIONAL AUTHORITY.

Equipment, which is detective 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 detemlined 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 EXCLUSIYE REMEDIES EXPRESSLY IN LIEU OF ALL OTHER

REMEDIES AND IN PARTICULAR THERE SHALL BE EXCLUDED THE IMPLIED WARRANTIES OF MERCHANT_MBILITY AND FITNESS FOR A PARTICULAR

PURPOSE. IN NO EVENT WILL BECKETT BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGE OF ANW NATURE. Beckett neither assumes nor

authorizes any person to assume t\_r Beckett any other liability or obligation in colmection with the sale of this equipment, Beckett's liability and Customer's