Field Controls Furnace MPL B User Manual

Installation, Operation and

Maintenance Manual

Oil Fired Warm Air Furnaces

WML-C AND MPL-B

(Down-Flow or Horizontal Model)

ALL INSTALLATIONS MUST MEET ALL

LOCAL, PROVINCIAL/STATE, AND

FEDERAL CODES WHICH MAY

DIFFER FROM THIS MANUAL

ECR International Limited

OLSEN Division

Read this complete manual before

beginning installation. These

instructions must be kept with the

furnace for future reference.

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enable proper sizing of the trunk and

branch ductwork. In retrofit applications,

building shell (overall) heat loss

IMPROPER

INSTALLATION

MAY

NOT

USE

GASOLINE,

calculation may be used.

CREATE A CONDITION WHERE THE

OPERATION OF THE PRODUCT

COULD CAUSE PERSONAL INJURY

OR PROPERTY DAMAGE.

CRANKCASE OIL, OR ANY OTHER

OIL CONTAINING GASOLINE AS A

FUEL FOR THIS FURNACE.

In the United States, Manual J. titled,

"Load Calculation" published by the Air

Conditioning Contractors of America,

(ACCA), describes a suitable procedure

for calculating the maximum hourly heat

loss.

INTRODUCTION

IMPROPER

ADJUSTMENT,

INSTALLATION,

ALTERATION,

Please

read

these

instructions

completely and carefully before installing

and operating the furnace.

SERVICE OR MAINTENANCE CAN

CAUSE INJURY OR PROPERTY

DAMAGE. REFER TO THIS MANUAL

FOR ASSISTANCE OR ADDITIONAL

In Canada, the maximum hourly heat

loss may be calculated in accordance

with the procedures described in the

manuals of the Heating, Refrigeration

and Air Conditioning Institute (HRAI), or

by other method prescribed by

authorities having jurisdiction that are

suitable for local conditions.

The furnace must be installed and set up

by a qualified contractor.

INFORMATION,

CONSULT

QUALIFIED INSTALLER, SERVICE

AGENCY OR THE FUEL SUPPLIER.

Model WML-C is an oil fired forced air

multi-positional furnace, with an output

capacity range of 58,000 BTU/Hr. to

85,600 BTU/Hr. The MPL-B is also an oil

fired forced air multi-positional furnace

with an output capacity range of 85,500

BTU/Hr. to 123,000 BTU/Hr. The WML-

C AND MPL-B furnace may be installed

in the down-flow position, as well as both

left and right horizontal positions.

LOCATION OF UNIT

The furnace should be located such that

the flue connection to the chimney is

short, direct and consists of as few

elbows as possible. When possible, the

unit should be centralized with respect to

the supply and return air ductwork. A

central location minimizes the trunk duct

sizing. All models may be installed on

combustible floors. Do not install the

furnace on carpet or tiled floors.

THIS PRODUCT MUST BE INSTALLED

IN STRICT COMPLIANCE WITH THESE

INSTALLATION INSTRUCTIONS AND

ANY APPLICABLE LOCAL, STATE,

AND NATIONAL CODES INCLUDING

BUT NOT LIMITED TO: BUILDING,

All models are listed with the Canadian

Standards Association, (CSA), and

comply with the standards of both the

United States and Canada for use with

No. 1 (Stove) and No. 2 (Furnace) Oil.

ELECTRICAL

CODES.

AND

MECHANICAL

In the United States, the installation of

the furnace and related equipment shall

be installed in accordance with the

regulations of NFPA No. 31, Installation

of Oil Burning Equipment, as well as in

accordance with local codes.

Minimum installation clearances are

listed in Table 1.

NOTE: The recommended installation

clearances do not necessarily take into

consideration the clearances necessary

to replace the air filter or perform other

routine maintenance.

The furnace area must not be used as a

broom closet or for any other storage

purposes, as a fire hazard may be

created. Never store items such as the

following on, near or in contact with the

furnace:

In Canada, the installation of the furnace

and related equipment shall be installed

in accordance with the regulations of

CAN/CSA - B139, Installation Code For

Oil Burning Equipment, as well as in

accordance with local codes.

DOWN-FLOW INSTALLATION

All WML-C AND MPL-B furnace models

have been assembled for installation in

the down-flow position. Maintain all

clearances to combustibles as outlined in

Table 1. Suggestion; as a measure to

prevent fuel oil from accumulating in

locations other than the fire pot, as could

be the case in the event of nozzle drip,

install the furnace with an approximate 2

degree slope from the oil burner casing

towards the fire pot. Use shims made of

noncombustible material.

1. Spray or aerosol cans, rags,

brooms,

dust

mops,

vacuum

cleaners or other cleaning tools.

When

questions arise, regulations prescribed in

the National Codes and Local

installation

application

2. Soap powders, bleaches, waxes or

other cleaning compounds; plastic

items or containers, gasoline,

kerosene, cigarette lighter fluid, dry

cleaning fluids, or other volatile

fluids.

Regulations take precedence over the

general instructions provided with this

installation manual. When in doubt,

please consult your local authorities.

All models are shipped assembled and

pre-wired. The furnace should be

carefully inspected for damage when

being unpacked.

3. Paint thinners or other painting

materials and compounds.

4. Paper bags, boxes, or other paper

or cardboard products.

HEAT LOSS

Never operate the furnace with the

blower door removed. To do so could

result in serious personal injury and/or

equipment damage.

To determine the correct furnace and

firing rate for an application, it is

necessary to calculate the maximum

hourly heat loss of the building based on

local design conditions. In new

construction, the heat loss should be

calculated on a room-by-room basis to

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HORIZONTAL INSTALLATION

Table 1: Clearance to Combustibles

WML-C AND MPL-B furnaces models

are assembled and shipped ready for

installation in the down-flow position. The

furnace may be installed in either of the

WML-C

MPL-B

Furnace

Location

Top

Down flow Horizontal Down flow Horizontal

0 in.

1 in.

3 in.

1 in.

0 in.

1 in.

3 in.

1 in.

horizontal

positions;

warm

air

discharging left or warm air-discharging

right by following these steps:

Bottom

S/A Plenum

Rear

1 in.

1. Rotate the furnace 90° to the

desired position.

1 in.

Sides

1 in.

2. Remove the three nut and washer

sets fastening the oil burner

assembly to the furnace. Rotate the

oil burner assembly to be in the

normal upright position.

Front

10 in.¹

9 in. ²

Closet

10 in.¹

9 in. ²

Closet

10 in.¹

9 in. ²

Closet

10 in.¹

9 in. ²

Closet

Flue Pipe

Enclosure

3. Re-align the oil burner assembly to

the combustion chamber (fire-pot),

and then secure into place with the

three nut and washer sets.

¹24 inches is required for servicing.

²18 inches required in the United States.

shims made of noncombustible material.

of nozzle drip, install the furnace with an

approximate 2 degree slope from the oil

burner casing towards the fire pot.

NON-SUSPENDED INSTALLATION

SUSPENDED INSTALLATION

Maintain clearances to combustibles as

outlined in Table 1. Installation on a

combustible floor requires a clearance of

1 inch. This can be done by using a

noncombustible material such as one-

inch thick channel iron or similar

material. The furnace must be supported

in such a way as to not allow twisting or

sagging of the cabinet. Suggestion; as a

measure to prevent fuel oil from

accumulating in locations other than the

fire pot, as could be the case in the event

of nozzle drip, install the furnace with an

approximate 2-degree slope from the oil

burner casing towards the fire pot. Use

Refer to Figure 1. Maintain clearances to

combustibles as outlined in Table 1. The

furnace may be suspended by field

fabricating a cradle of angle iron and

threaded rod. Secure the furnace with 2

AIR CONDITIONING

If the furnace is used in conjunction with

air conditioning, the furnace shall be

installed in parallel with or upstream from

the evaporator coil to avoid condensation

in the heat exchanger. In a parallel

installation, the dampers or air controlling

means must prevent chilled air from

entering the furnace. If the dampers are

manually operated, there must be a

means of control to prevent the operation

of either system unless the dampers are

in the full heat or full cool position. The

air heated by the furnace shall not pass

inch

minimum

slotted

angle

equivalent, as shown in Figure 1. The

furnace must be supported in such a way

as to not allow twisting or sagging of the

cabinet. Position the supports so as to

not interfere with accessing the burner

and blower compartments. Suggestion;

as a measure to prevent fuel oil from

accumulating in locations other than the

fire pot, as could be the case in the event

Fig 1 Suspended Installation

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through a refrigeration unit unless the

unit is specifically approved for such

service.

If the chimney serves the WML-C

furnace only, the vent should be sized at

5-inch minimum. The MPL-B should be

6-inch minimum. The data provided in

Table 3 is based on dedicated venting. If

the furnace is to be co-vented with other

appliances, refer to NFPA 211, Standard

for Chimneys, Fireplaces, Vents, and

Solid Fuel-Burning Appliances, NFPA

31, Standard for the Installation of Oil

Burning Equipment or CAN/CSA B139,

Installation Code For Oil Burning

Equipment for correct sizing information.

THE

FURNACE

MUST

Generally, a six-inch clearance between

the air conditioning evaporator coil and

the heat exchanger will provide adequate

airflow through the evaporator coil.

CONNECTED TO A FLUE HAVING

SUFFICIENT DRAFT AT ALL TIMES TO

ENSURE

SAFE

AND

PROPER

OPERATION OF THE APPLIANCE.

The blower speed must be checked and

adjusted to compensate for the pressure

drop caused by the evaporator coil.

Refer to Appendix B for recommended

wiring and electrical connections of the

air conditioning controls.

The flue pipe must not be routed through

concealed space, because it must be

visually

checked

during

for

signs

the annual

deterioration

inspection and servicing. The flue pipe

must not pass through any floor or

ceiling, but may pass through a wall

where suitable fire protection provisions

have been installed. In the United States,

refer to the latest edition of NFPA 31 for

regulations governing the installation of

oil burning equipment. In Canada, refer

to the latest edition of CAN/CSA B139

for rules governing the installation of oil

burning equipment.

NOTE: This furnace is approved for

use with L-Vent.

COMBUSTION AIR

NOTE: Maximum temperature for L-

Vent is 575°F (300°C).

When a furnace is installed in the full

basement of a typical frame or brick

house, infiltration is normally adequate to

provide air for combustion and draft

operation. If the furnace is installed in a

closet or utility room, two (2) ventilation

openings must be provided connecting to

a well ventilated space (full basement,

living room or other room opening

thereto, but not a bedroom or bathroom).

One opening shall be located 6" from the

top and bottom of the enclosure at the

front of the furnace. For furnaces located

IMPORTANT: The chimney must be

capable of providing sufficient draft at all

times for the safe removal of the

products of combustion.

The chimney should be tested under

“winter” conditions; doors and windows

closed, all other fossil fuel burning

appliances on, clothes dryer on,

bathroom fans on, etc. If the chimney

cannot overcome the competition for air,

it will be necessary to access the reason

for it, and take corrective action. If the

chimney is found to be sized correctly

and in good repair, it will probably be

necessary to re-evaluate the availability

of combustion and ventilation air, and

take corrective action.

NOTE: THE RECOMMENDED FLUE

DRAFT PRESSURE IS -0.02 IN. W.C.

(AS MEASURED UPSTREAM OF THE

BAROMETRIC DRAFT REGULATOR).

SHOWN IN FIGURE 1.

buildings

unusually

tight

DRAFT REGULATOR CONTROL

construction, such as those with high

quality weather stripping, caulking,

windows and doors, or storm sashed

windows, or where basement windows

are well sealed, a permanent opening

communicating with a well ventilated

attic or with the outdoors shall be

provided, using a duct if necessary. Size

all of the openings and associated

ductwork by the standards provided in

the latest Oil Installation Code editions;

NFPA 31 in the United States, CAN/CSA

B139 in Canada. Take all fuel burning

appliances in the area into consideration

when calculating combustion and

ventilation air requirements.

This device is used in conjunction with

conventional chimney venting. This

control (or draft regulator) automatically

maintains a constant negative pressure

in the furnace to obtain maximum

efficiency. It ensures that proper

pressures are not exceeded. If the

chimney does not develop sufficient

draft, the draft control cannot function

properly. The draft regulator, must be

installed within the same room or

enclosure as the furnace, and should not

interfere with the combustion air supplied

to the burner. The control should be

The flue pipe should be as short as

possible with horizontal pipes sloping

upward toward the chimney at a rate of

one-quarter inch to the foot. The flue

pipe should not be smaller in cross

sectional area than the flue collar on the

furnace. The flue pipe should connect to

the chimney such that the flue pipe

extends into, and terminates flush with

the inside surface of the chimney liner.

Seal the joint between the pipe and the

lining. The chimney outlet should be at

least two feet above the highest point of

located

minimum of

flue pipe

diameters from the furnace breeching

and installed in accordance to the

instructions supplied with the regulator.

The Model CAS-2B-90E Furnace Boot

manufactured by Field Controls, Inc. may

be used with the furnace to obtain

combustion air from outdoors. Use of this

device does not alter the need for

ventilation air; however, it does provide a

good source of combustion air and is

connected to the oil burner.

peaked roof. All unused chimney

openings should be closed. Chimneys

must conform to local, provincial or state

codes, or in the absence of local

regulations, to the requirements of the

National Building Code.

CHIMNEY VENTING

See Figure 2 and Table 2 for common

chimney problems and their remedies.

The chimney must be sized correctly and

be in good repair. If the chimney is

oversized, there is a high risk of the flue

gases condensing resulting in damage to

the chimney and other venting parts.

This problem may be corrected by the

use of an appropriately sized chimney

liner.

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Fig. 2: Common Chimney Problems

Can be found

by light and

mirror reflecting break and

conditions in

chimney.

Obstruction in

chimney

Use weight to

dislodge.

Must be

Lowering a light handled by

on an extension competent

cord.

Joist protruding

into chimney.

masonry

contractor.

Smoke test -

build smudge

fire blocking off

other opening,

watching for

smoke to

Must be

handled by

competent

masonry

Break in

chimney lining.

contractor.

escape.

Clean out with

weighted brush

or bag of loose

gravel on end

of line.

Collection of

soot at narrow

space in flue

opening.

Lower light on

extension cord.

Change to

straight or to

long offset.

Lower light on

extension cord.

Offset

The least

important

Two or more

openings to the inspection from

same chimney.

Found by

opening must

be closed,

using some

other chimney

flue.

basement.

Leaks should

be eliminated

by cementing

all pipe

Loose-seated

pipe in flue

opening.

Smoke test.

openings.

Measurement

of pipe from

within or

observation of

pipe by means

of a lowered

light.

Length of pipe

must be

Smoke pipe

extends into

chimney.

reduced to

allow end of

pipe to be flush

with inside of

tile.

Table 2: Common Chimney Problems

Failure to

Refer to Figure 2

extend the

length of flue

partition to the

floor.

By inspection or Extend partition

Key

Trouble

Diagnostic

Remedy

smoke test.

to floor level.

Extend chimney

above all

surrounding

objects within

30 feet.

Top of chimney

lower than

surrounding

objects

Observation

Loose-fitted

clean-out door.

Close all leaks

with cement.

Smoke test.

Chimney Cap

or ventilator.

Observation

Remove

Make opening

as large as

inside of

Coping restricts

opening.

chimney.

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In general, the oil tank must be properly

supported and remain stable in both

empty and full condition. The oil tank

must be fitted with vent and supply pipes

to the outdoors. Refer to the above-

mentioned codes for sizing. The vent

pipe must be no less than 1¼ inches

I.P.S., and terminate with an appropriate

vent cap in a location where it will not be

blocked. The fill pipe must be no less

than 2 inches I.P.S., and terminate with

an appropriate cap in a location where

debris will not enter the fill pipe during oil

delivery.

Table 4: Oil Lines

OPTIONAL SIDE WALL VENTING

Certain WML-C AND MPL-B furnace

models are manufactured to be installed

as sidewall vented units. Please refer to

Direct Venting Instructions, P/N 28888

included with the Vent Kit for details.

Copper Tubing Oil Line Length (Feet)

Single-Pipe OD

Two-Pipe OD

Lift

(Feet)

3/8”

1/2”

100

3/8”

1/2”

100

Sidewall

Venting

(Direct

Venting)

requires the use of specific oil burners;

the Beckett AFII, or the Riello 40BF.

Please refer to Appendix A, Tables A2,

and A4.

Note: Sidewall venting requires special

attention to combustion air supply. There

is no natural draft in the venting system

between furnace cycles; therefore, if the

indoor pressure is negative relative to

the outdoors, the vent terminal becomes

a point of infiltration. This could lead to

oil odour control problems. This problem

is rectified by the use of ducted outdoor

If located indoors, the tank should

normally be in the lowest level, (cellar,

basement, etc.). It must be equipped

with a shut-off valve at the tank outlet

used for the oil supply. The oil tank must

be located as to not block the furnace /

room exit pathway. Observe all

clearances specified in the above-

mentioned codes.

- - -

air

for

combustion

(semi-sealed

combustion), using the Beckett AFII or

Riello 40BF oil burner. See Direct Vent

Instructions supplied with the Vent Kits.

PIPING INSTALLATION

Table 3: Minimum Chimney Base

Temperatures (°F)

In the United States, NFPA 31, Standard

for the Installation of Oil Burning

Equipment, Chapter 2.

In retrofit applications, where an existing

oil line system is in place, a vacuum

check will help determine the efficacy of

the existing oil line system The vacuum

in a system should not exceed 6” Hg. for

a single pipe system, nor 12” Hg. for a

two-pipe system.

Chimney Height (ft.)

Nozzle

In Canada, the entire fuel system should

be installed in accordance with the

requirements of CAN/CSA B139, and

local regulations. Use only approved fuel

oil tanks piping, fittings and oil filters.

Chimney Thermal Resistance < R6

0.50

0.65

0.70

0.75

0.85

1.00

300

275

270

260

250

225

400

340

330

320

300

535

430

405

380

355

365

725

535

505

475

430

NOTE: The oil burner requires the use of

a bypass plug when converting from

single-pipe to two-pipe oil piping

systems. See burner manufacturer’s

instructions.

Ensure that all fittings used in a copper

oil line system are high quality flare

fittings. Do not use compression fittings.

Do not use Teflon tape on any fittings.

All fuel systems should include an oil

filter between the fuel oil storage tank

and the oil burner. For best results,

install the oil filter as close to the burner

as possible. When using an indoor oil

tank, the oil filter may be installed at the

tank downstream from the shut-off valve.

If firing the furnace under the 0.65 gph

rate, a 7 to 10 micron line filter should be

installed as close to the oil burner as

possible.

Pressurized or gravity feed installations

must not exceed 3 PSIG. Pressures

greater than 10 PSIG may cause

damage to the shaft seal. If the height of

the oil stored in a tank above the oil

burner exceeds 11½ feet, it may be

necessary to use a pressure-regulating

device approved for this purpose.

Chimney Height (ft.)

20 28

Nozzle

Chimney Thermal Resistance > R6

0.50

0.65

0.70

0.75

0.85

1.00

185

175

165

200

185

220

205

195

250

220

215

210

205

The furnace may be installed with a one-

pipe system with gravity feed or lift. The

maximum allowable lift on a single line

system is 8 feet. Lift should be measured

from the bottom (outlet) of the tank, to

the inlet of the burner. Sizing a single

line system is complex because of the

difficulty estimating the pressure drop

ELECTRICAL CONNECTIONS

The furnace is listed by the Canadian

Standards Association (CSA). It is

factory wired and requires minimal field

wiring. In the United States, the wiring

must be in accordance with the National

Fire Protection Association NFPA-70,

National Electrical Code, and with local

codes and regulations. In Canada, all

field wiring should conform to CAN/CSA

C22.1 Canadian Electrical Code, Part 1,

and by local codes, where they prevail.

< - less than, > - greater than

OIL TANK

through

each

fitting,

bend

and

component in the line. In general, keep

single line systems short as possible.

The following chart shows the allowable

line lengths (horizontal + vertical) for

single and two-line oil piping systems. All

distances are in feet.

Oil storage tanks must be selected and

installed in compliance with applicable

codes; in the United States, NFPA 31,

Standard for the Installation of Oil

Burning Equipment, Chapter 2. and in

Canada, CAN/CSA-B139, Installation

Code for Oil Burning Equipment, Section

6. Observe all local codes and by-laws.

The furnace should be wired to

separate and dedicated circuit in the

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main

electrical

panel;

however,

2. Connect an ammeter between the

wire and the thermostat terminal to

which it was attached.

If the limit control opens with the United

Technologies 1158-120 electronic fan

control, the circulating fan will be

energized as well. When the limit closes,

the control initiates a two minute delay.

When this delay is finished, the fan off

timer will begin. At the end of the fan off

time cycle the burner will be energized,

initiating a normal burner cycle.

accessory equipment such as electronic

air cleaners and humidifiers may be

included on the furnace circuit. Although

a suitably located circuit breaker can be

used as a service switch, a separate

service switch is advisable. The service

switch is necessary if reaching the circuit

breaker involves becoming close to the

furnace, or if the furnace is located

between the circuit breaker and the

means of entry to the furnace room. The

furnace switch (service switch) should be

clearly marked, installed in an easily

accessible area between the furnace and

furnace room entry, and be located in

such a manner to reduce the likelihood

that it would be mistaken as a light

switch or similar device.

3. Note the amperage reading when

the heating contacts are closed.

(System switch must be on “HEAT” if

so equipped.

4. Re-connect the thermostat wire. If

the thermostat is serving

combination heating and

air

TABLE 5

Honeywell ST9103

conditioning system, pay particular

attention to polarity.

Dip Switch

Position

Blower Off Delay

Time

5. When the thermostat is reconnected

and re-plumbed, adjust the heat

anticipator setting to match the

observed amperage reading.

Off

60 seconds

90 seconds

120 seconds

150 seconds

FAN TIMER BOARD AND LIMIT

CONTROL

The power requirements for all models:

120 VAC, 1 ∅, 60 Hz., 12A.

The Electronic Fan Timer integrates

control of all burner and circulator fan

operations. This control is the central

wiring point for most of the electrical

components in the furnace. The

Honeywell ST9103 has a fixed fan delay

on time of 30 seconds after the burner

ignites. The United Technologies 1158-

120 has an adjustable fan on time that is

Accessories requiring 120 VAC power

sources such as electronic air cleaners

and humidifier transformers may be

powered from the ST9103 EFT. Do not

use the direct drive motor connections as

a power source, since there is a high risk

of damaging the accessories by

exposure to high voltage from the auto-

generating windings of the direct drive

motor.

TABLE 6

United Technologies 1158-120

Dip Switch

Position

Blower Delay

Times

Off

Seconds Minutes

Off Off

On Off

Off On

On On

120

set

selecting

the

dipswitch

combination displayed in Table 6. This

fan on delay can be set at 30, 60, 90 or

120 seconds. This provides a delay

between the burner ignition and blower

start-up to eliminate excessive flow of

cold air when the blower comes on. The

Honeywell ST9103 has an adjustable

fan off time of 60, 90, 120 and 150

Thermostat wiring connections and air

conditioning contactor low voltage

connections are shown in the wiring

Off Off

On Off

Off On

On On

diagrams.

Some

micro-electronic

thermostats require additional controls

and wiring. Refer to the thermostat

manufacturer's instructions.

seconds that is set by selecting

dipswitch combination on the control

board displayed in Table 5. Similarly the

United Technologies 1158-120 have an

adjustable fan off time of 2, 3, 4 or 6

minutes displayed in Table 6. The fan off

delay time starts when the burner motor

is de-energized at the end of a call for

heat. Blower shutdown is delayed to

remove any residual heat from the heat

exchanger and improve the annual

efficiency of the furnace.

The thermostat should be located

approximately 5 feet above the floor, on

an inside wall where there is good

natural air circulation, and where the

thermostat will be exposed to average

room temperatures. Avoid locations

where the thermostat will be exposed to

cold drafts, heat from nearby lamps and

appliances, exposure to sunlight, heat

from inside wall stacks, etc.

Note: It is advisable not to set the

fan on delay time for a time period

longer than 90 seconds at highest

input. Longer fan on delay times

may result in nuisance limit trips.

CIRCULATING AIR BLOWER

All WML-C AND MPL-B furnace models

are equipped with a direct drive blower

system. Direct drive blower speed

adjustments are not normally required in

properly sized extended plenum duct

systems. The motor RPM and air CFM

delivery will vary automatically to

accommodate conditions within the usual

range of external static pressures typical

of residential duct systems. Under-sized

Normal heat anticipator setting: 0.1 A.

For more precise adjustment, the heat

anticipator may be adjusted to the

amperage draw of the heating control

circuit as measured between the "R" and

"W" terminals of the thermostat. To

reduce the risk of damaging the heat

anticipator, do not measure circuit

without first removing one of the two

wires first. To determine the heating

circuit amperage draw:

The electronic fan timer board works in

conjunction with snap disc limit controls,

which perform a safety function, and

breaks power to the oil burner primary

control, which shuts off the burner if the

furnace over-heats. The limit control is

thermally operated and automatically

resets. The limit control is factory

installed, pre-set and is not adjustable.

duct systems may require

higher

blower speed to obtain a reasonable

system temperature rise. Some older

duct systems were not designed to

provide static pressure. They typically

feature special reducing fittings at each

branch run and lack block ends on the

If a limit control opens, the Honeywell

ST9103 will energize the circulating fan.

When the limit control closes the burner

is re-energized and the heating cycle

begins again.

1. Disconnect one of the “R” or “W”

wires from the thermostat terminal.

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trunk ducts. These systems may require

modification to provide some resistance

to the airflow to prevent over-amping of

the direct drive blower motor. Selecting a

lower blower speed may correct this

problem.

into contact with the furnace heat

exchanger. Do not use direct drive motor

connections as a source of power for

120 VAC humidifiers and humidifier

transformers.

box, tape off both ends of the unused

wire.

DISCONNECT THE POWER SUPPLY

OIL BURNER

Direct drive blower speeds are adjusted

by changing the "hot" wires to the motor

winding connections. Please refer to

wiring diagram in Appendix B or the

wiring diagram label affixed to the

THE

FURNACE

BEFORE

The oil burner must align properly with

the cerafelt fiber chamber (firepot). The

cerafelt fiber chamber is initially quite

soft, but hardens and becomes quite

brittle after the first firing. The firepot is

held in place by a retaining bracket;

however, it is possible for the firepot to

shift if subjected to rough handling during

transit.

OPENING THE BLOWER ACCESS

DOOR TO SERVICE THE AIR FILTER,

FAN AND MOTOR. FAILURE TO

SHUT OFF POWER COULD ALLOW

furnace.

THE

NEUTRAL

WIRE

THE

BLOWER

START

(normally the white wire) IS NEVER

MOVED TO ADJUST THE BLOWER

SPEED.

UNEXPECTEDLY, CREATING A RISK

OF DEATH OR PERSONAL INJURY.

Do not use the blower speed wires as

a source of power to accessories as

electronic air cleaners and humidifier

transformers. The unused motor taps

DO NOT CONNECT POWER LEADS

BETWEEN MOTOR SPEEDS. THE

NEUTRAL WIRE MUST ALWAYS BE

CONNECTED TO THE MOTOR'S

DESIGNATED NEUTRAL TERMINAL.

auto-generate

sufficiently

high

BEFORE

FURNACE

OPERATING

CHECK

THE

BURNER

voltages

equipment.

damage

Use the

accessory

terminals

ALIGNMENT WITH COMBUSTION

CHAMBER. THE END CONE OF THE

AIR TUBE MUST BE CENTRED TO

provided on the electronic fan timer.

THE

ACCOMODATING

RING

It is possible and acceptable to use a

single blower speed for both heating and

cooling modes. The simplest method to

connect the wiring from both modes is to

PROVIDED IN THE DESIGN OF THE

COMBUSTION CHAMBER. ADJUST

ALIGNMENT

Do not start the burner or blower fan

unless the blower access door is

securely in place.

NECESSARY

BEFORE THE FIRST FIRING.

use

"piggy-back

connector"

accommodating both wires on a single

motor tap. It is also acceptable to

connect the selected motor speed with a

pigtail joined to both heating and cooling

speed wires with a wire nut. As a safety

OIL BURNER NOZZLES

Additional ST9103 Fan Timer Control

information is in Appendix A, Tables, and

in Appendix B, Wiring Diagrams.

WML-C AND MPL-B furnaces are

certified for multiple firing rates, ranging

from approximately 58,000 to 85,600

BTU/hr. on the WML-C and 85,500 to

123,000 BTU/Hr. on the MPL-B By

changing the oil burner nozzle within the

specific model range, and temperature

rise, the furnace may be fired at an ideal

rate for a wide range of structures.

HUMIDIFIER

precaution

against

accidental

disconnection of the wires by vibration, it

is advisable to secure the wire nut and

wires with a few wraps of electricians

tape.

A humidifier is an optional accessory

available through most heating supplies

outlets. Installation should be carried out

in accordance with the humidifier

manufacturer's installation instructions.

Water or water droplets from the

humidifier should not be allowed to come

If the joining of the blower speed

wiring is done in the furnace junction

Figure 4: Horizontal Smoke Test Port Location

Figure 5: Vertical Smoke Test Port Location

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BURNER ELECTRODES

PROCEDURE:

excess air, or contaminated fuel. Do not

ignore this indicator.

Correct positioning of the electrode tips

with respect to each other, to the fuel oil

nozzle, and to the rest of the burners is

essential for smooth light ups and proper

operation. The electrode tips should be

adjusted to a gap of 5/32”, 1/16” ahead

of the nozzle, 5/16” above the centerline

of the nozzle. The “Z” dimension (front

edge of the burner head to the front face

of the nozzle is 1-1/8 inches.

Start the burner and allow it to run at

least ten minutes. Set the air shutter to

STACK TEMPERATURE:

give

good flame visually. The

Stack temperature will vary depending

on fuel input, circulating air blower

speed, and burner set up, etc. In

general, stack temperature should

typically range between 380°F to 550°F,

assuming that the combustion air is

approximately room temperature (65°F -

combustion air supply to the burner is

controlled by manipulating the air shutter

on the left side of the burner, and, if

necessary, the bulk air band. To adjust,

loosen the bolt on the movable shutter.

Move the shutter gradually until a good

flame (visually) has been achieved. Re-

snug the bolt.

70°F).

temperature indicates greater efficiency;

however, excessively low stack

general,

lower

stack

Electrode positioning should be checked

before the first firing of the furnace.

Check the initial draft setting as the

furnace warms up. The draft may be

measured at the test port. The breech

draft should be approximately - 0.05”

w.c. to obtain an over fire draft reading of

- 0.02 inches w.c.

temperature can lead to condensation

forming in the chimney and / or venting.

Sulphur and similar contaminants in the

fuel oil will mix with condensation to form

acids. Acids and resultant chemical salts

will cause rapid deterioration of the

chimney and venting components, and

may attack the furnace.

The electrode porcelains should be free

of cracks, the electrode tips should be

tapered and free of burrs, and the

contact rods must be clean and be in

firm contact with the ignition transformer

contact springs. The electrodes must not

come into contact with the burner head.

Check the oil pump pressure. Standard

operating pressure is 100 PSIG.

OIL BURNER SET-UP

After reaching steady state, take

If the flue gases are below the range, it

may be necessary to slow down the

blower fan. If the flue gases are above

the range, the blower fan may require

speeding up. Stack temperature varies

directly with the system temperature rise.

System temperature rise is the difference

between the furnace outlet temperature

and furnace inlet temperature as

measured in the vicinity of the

connection between the plenum take-offs

and the trunk ducts.

smoke test. If not indicating a trace, set

the combustion air controls to provide a

trace.

The burner air supply is adjusted to

maintain the fuel to air ratio to obtain

ideal combustion conditions. A lack of air

causes "soft" and "sooty" flames,

resulting in soot build-up throughout the

heat exchanger passages. Excess

combustion air causes a bright roaring

fire and high stack temperatures

resulting in poor fuel efficiency.

Typically, the CO₂reading will range

from 11.5% to 13.5%.

After the air adjustments have been

completed, and the air shutter or air

adjustment plate has been secured, re-

check the over fire draft and take another

smoke test to ensure that the values

have not changed.

PREPARATIONS:

Drill a ¼” test port in the venting, ideally

at least 2 flue pipe diameters away from

the furnace breeching, if venting

horizontally from the furnace, or from the

flue pipe elbow if venting vertically before

reaching the furnace. (See Figures 4 and

5).

If the venting from the furnace to the

chimney is long, or exposed to cold

ambient temperatures, it may be

necessary to use L-Vent as the vent

connector to reduce stack temperature

loss to prevent condensation. The

venting should be inspected annually to

ensure that it is intact.

The test port will allow flue gas samples

to be taken and stack temperatures to be

measured.

FURNACE INSTALLATION SET-

Before starting the burner, check the

burner alignment with the combustion

chamber (fire pot), check that the correct

nozzle is tightened into place, and that

the burner electrodes are properly

positioned.

The furnace must be set up as the final

step in the installation.

A) The oil burner must be set up

following the procedures outlined above.

B) The WML-C models should operate

within a temperature rise of 45°F to 75°F.

The MPL-B temperature rise range

should be 50°F to 80°F. To determine

the temperature rise, measure the supply

air and return air temperatures when the

furnace has reached steady state

conditions. This is the point at which the

supply air temperature stops increasing

relative to the return air temperature. The

furnace may have to run 10 to 15

minutes to reach steady state conditions.

The measurements may be made with

duct thermometers or thermocouples

The Beckett burner bulk air band is

should be closed, and the air shutter

initial setting should be approximately

7.00.

Figure 6: Checking Over-Fire Draft.

Note A: Locate hole at least 6 inches on

the furnace side of the draft control.

SMOKE TEST NOTE:

Note B: Ideally, hole should be at least

12 inches from breeching or elbow.

If oily or yellow smoke spots are found

on the smoke test filter paper, it is

usually a sign of unburned fuel. This

indicates poor combustion. This type of

problem may be caused by excess draft,

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used in conjunction with multi-meters

with temperature measurement

capabilities.

anywhere within the heating system

which may cause some concern or

annoyance to the home owner, etc.

B: Annual Service By Contractor

The return air should be measured at a

point where the thermometer will be well

within the air stream near the furnace

return air inlet. Actual location is not

particularly critical; however, avoid

F) Be sure that the homeowner is

THE

COMBUSTION

CHAMBER

familiar

with

the

furnace.

The

(FIREPOT) IS FRAGILE. USE CARE

WHEN INSPECTING AND CLEANING

THIS AREA.

homeowner should be aware of the

location of electrical circuit breaker or

fuse, the location of any electrical

switches controlling the furnace, the

location of the oil tank shut-off valve and

how to operate the valve. The

homeowner should be informed where

the oil tank gauge is located and how to

read it.

locations

where

the

temperature

The heat exchanger should be inspected

periodically and cleaned if necessary. If

cleaning is necessary, SHUT OFF

POWER TO THE FURNACE and

remove the burner. Using a stiff brush

with a wire handle, brush off scale and

soot from inside the drum and flue pipe.

To clean the radiator, remove the round

cover or covers on the inner radiator

access pipes located on the front panel

between the oil burner and the flue pipe.

Rear breech models have a single front

cleanout and front breech models have

two front cleanouts.

readings could be affected by humidifier

bypass ducts, the inside radius of

elbows, etc.

The supply air temperature should be

measured at

point where the

thermometer will be well within the air

stream near the furnace supply air outlet.

Usually, the side mid-point of the supply

air plenum take-off is ideal, providing it is

out of the line of sight to the heat

exchanger. If the thermometer is within

the line of sight of the heat exchanger,

the supply air readings may be skewed

by radiant heat from the heat exchanger.

If the plenum take-off is unsuitable, the

supply air temperature may be measured

within the first 18 inches of the first

segment of supply air trunk duct.

It would be beneficial to review safety

issues with the home owner, such as the

danger of storing combustibles too close

to the furnace, hanging anything on the

furnace vent pipe, and especially the

dangers of indiscriminately pressing the

burner reset button.

IMPORTANT: Be sure that the home

owner knows where the burner reset

switch is located, and is aware that the

reset switch is not to be activated more

than once without a thorough look for the

cause of the problem, (lack of fuel, etc.).

Be sure that the homeowner knows

when to quit trying to start the furnace

during these conditions and who to call

for emergency service.

A wire brush can be used to loosen dirt

and debris on the inside surfaces of the

radiator. Clean out all accumulated dirt,

soot and debris with a wire handled

brush and an industrial vacuum cleaner.

Replace the clean-out covers.

If the temperature rise is outside the

recommended range, it may be adjusted

on direct drive equipped units by

selecting alternate circulation fan motor

speeds. If the temperature rise is too

high, speed the fan up. If the

temperature rise is too low, slow the fan

down.

Most circulating fan motors are

permanently lubricated by the motor

manufacturer. These motors will have no

oil ports. If the blower motor does

contain oil ports, under normal operating

conditions it will not require oiling for the

first two years. Oil sparingly; a few drops

in each oil port with SAE 20 non-

detergent oil. Oiling is most easily done

with a "tele-spout" oiler. This oiler has a

long flexible plastic spout. DO NOT

OVER-LUBRICATE. Excess oil may

result in premature electric motor failure.

MAINTENANCE AND SERVICE

A: Routine Maintenance By Home

Owner

C) Keep in mind that the stack

temperature varies directly with the

temperature rise. The higher the

temperature rise, the higher the stack

temperature will be, resulting in lower

efficiency. The lower the temperature

rise, the lower the stack temperature will

be, which, in some cases, may allow

condensation to form in the chimney and

other vent parts.

Other than remembering to arrange for

the annual professional servicing of the

furnace by the service or installation

contractor, the most important routine

service performed by the homeowner is

to maintain the air filter or filters. A dirty

filter can cause the furnace to over-heat,

fail to maintain indoor temperature during

cold weather, increase fuel consumption

and cause component failure.

Inspect the blower fan. Clean it if

necessary.

Oil Burner Maintenance: Follow the

instructions

manufacturer.

the

(See

oil

burner

D) Test the high limit control to ensure

that it is operating correctly. This may be

done by temporarily removing the

circulator fan heating wire or neutral

wire. Turn of electrical power to the

furnace before working with the motor

wires. Be sure to protect any removed

wires from shorting out on metal furnace

parts. If the high limit test is successful,

shut off the electrical power to the

furnace, restore the proper motor wiring.

Finally, restore power to the furnace.

The furnace filter(s) should be inspected,

cleaned or replaced monthly. The

furnace is factory equipped with a semi-

permanent type filter. If the filter is

damaged, replace with filters of the same

size and type.

manufacturer's instructions supplied with

furnace). The oil burner nozzle should be

replaced annually. We recommend that

the oil filter be changed on an annual

basis.

During the routine service, inspect the

general condition of the furnace watching

for signs of oil leaks in the vicinity of the

oil burner, soot forming on any external

part of the furnace, soot forming around

the joints in the vent pipe, etc. If any of

these conditions are present, please

advice your service or installation

contractor.

The venting system should be cleaned

and inspected for signs of deterioration.

Replace pitted or perforated vent pipe

and fittings. The barometric draft

regulator should open and close freely.

E) Operate the furnace through

All electrical connections should be

checked to ensure tight connections.

Safety controls such as the high limit

minimum of three full heating cycles.

During this time, check for fuel oil leaks,

gross air leakage from the supply air

ductwork, unusual noises originating

controls

should

tested

for

functionality. The fan control functions

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should be checked to ensure that all fan

speeds are operating properly.

furnace and set the thermostat above

room temperature. After three or four

minutes of burner operation, the limit

control should turn the burner off. When

the limit function test is complete, shut

off electrical power to the furnace,

replace the neutral wire to the blower fan

motor, and then restore power. The

blower fan will start up immediately.

Once the temperature has dropped and

the limit control has reset, the fan will

operate until the fan off time is achieved.

The oil burner will then resume operation

and continue until the thermostat is

satisfied. Restore the thermostat setting

to a comfortable temperature.

OPERATING INSTRUCTIONS

Before Lighting

Open all supply and return air registers

and grilles.

Open all valves in oil pipes.

Turn on electric power supply

To Light Unit

Set the thermostat above room

temperature to call for heat. The burner

should start. NOTE: It may be necessary

to press the RESET button on the

primary combustion control relay.

To Shut Down Unit

Set the thermostat to the lowest possible

setting.

There will be a fan on time delay before

the circulating fan is energized. The

Honeywell ST9103 has a fixed fan delay

on time of 30 seconds after the burner

ignites. The United Technologies 1158-

120 has an adjustable fan on time that is

Set the manual switch (if installed) in the

Electrical Power Supply Line to "OFF".

NOTE: If the furnace is to be shut down

for an extended period of time, close the

oil supply valve to the oil burner.

set

selecting

the

dipswitch

combination displayed in Chart 1. This

fan on delay can be set at 30, 60, 90 or

120 seconds.

Set the thermostat below room

temperature. The oil burner should stop.

DO NOT ATTEMPT TO START THE

BURNER WHEN EXCESS OIL HAS

ACCUMULATED,

WHEN

THE

The air circulation blower will continue to

run until the time off setting selected on

the electronic fan timer control times out.

The Honeywell ST9103 has an

adjustable fan off time of 60, 90, 120 and

150 seconds that is set by selecting a

dipswitch combination on the control

FURNACE IS FULL OF VAPOUR, OR

WHEN THE COMBUSTION CHAMBER

IS VERY HOT. NEVER BURN

GARBAGE OR PAPER IN THE

FURNACE, AND NEVER LEAVE

PAPER OR RAGS AROUND THE UNIT.

board.

Technologies

adjustable fan off time of 2, 3, 4 or 6

minutes The fan timer control

Similarly

the

United

1158-120

has an

adjustments may be altered if the air at

the room registers is uncomfortably high

upon blower start up or shutdown.

The necessary adjustments to the fan

control settings should be determined by

measuring the temperature of the air in

the supply air take-off, or within the first

few inches of the supply air trunk. The

side mid point of the transition is usually

ideal, providing that the thermometer

probe is beyond the "line of sight"

wherein false readings from radiant heat

could be observed. The system

temperature rise, the difference in

temperature between the supply air and

return air, should be within the indicated

range on the appliance rating plate.

To check the operation of the limit

switch, shut off power to the furnace.

Temporarily remove the neutral wire

from the direct drive blower motor.

Restore the electrical power to the

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APPENDIX A- WML-C AND MPL-B BURNER SET UP

WML-C AND MPL-B furnaces may be used with the following oil burners.

Please note: The Beckett AF, and Riello 40F oil burners are for applications using indoor air for combustion only. For sidewall

venting applications utilizing outdoor air for combustion, use the Beckett AFII or the Riello 40BF (Balanced Flue) oil burners

only.

Table A-1 Beckett AF Oil Burner Set-Up

Beckett AF Series Oil Burners

(For use with chimney vented units only)

Furnace

Model

Output

BTU/Hr

Burner

Model

Pump

Pressure

Static

Plate

Nozzle

Flow Rate

Head ¹

WML-60C ²

WML-80C

WML-90C

58,000

75,000

85,600

AF76BNHS

0.50 / 80°A

0.65 / 80°A

0.75 / 80°A

100 PSIG

0.50 USGPH

0.65 USGPH

0.75 USGPH

3- ⅜ in.

MPL-90B

MPL-100B

MPL-120B

MPL-130B

85,500

96,000

AF76XN

AF76YB

0.75 / 80°A

0.85 / 80°A

1.00 / 60°A

1.10 / 70°A

100 PSIG

0.75 USGPH

0.85 USGPH

1.00 USGPH

1.10 USGPH

2- ¾ in.

112,000

123,000

¹Head is shielded by ceramic insulator. ²Low Firing Rate Baffle required when using a 0.50-gallon nozzle.

Table A-2 Beckett AFII Oil Burner Set-Up

Beckett AFII Series Oil Burners

(For use with sidewall vented units using outdoor combustion air)

Furnace

Model

Output

BTU/Hr

Burner

Model

Pump

Pressure

Nozzle

Flow Rate

Head

WML-60CB2

WML-80CB2

WML-90CB2

63,500

75,000

85,600

AFII-85

0.50 / 60°A

0.60 / 60°A

0.70 / 60°A

145 PSIG

0.55 USGPH

0.65 USGPH

0.75 USGPH

FB0

FB3

MPL-90BB2

MPL-100BB2

MPL-120BB2

85,500

96,000

112,000

AFII-150

0.70 / 60°A

0.80 / 60°A

0.85 / 70°A

145 PSIG

0.75 USGPH

0.85 USGPH

1.00 USGPH

FB0

FB3

Table A-3 Riello 40F Series Oil Burner Set-Up

Riello 40F Series Oil Burners

(For use with chimney vented units)

Furnace

Model

Output

BTU/Hr

Burner

Model

Pump

Pressure

Turbulator

Setting

Nozzle

Flow Rate

Air Gate

WML-60CRF

WML-80CRF

WML-90CRF

59,500

75,000

85,600

40F3

0.50 / 60°W

0.60 / 60°W

0.65 / 60°W

105 PSIG

115 PSIG

135 PSIG

0.51 USGPH

0.65 USGPH

0.75 USGPH

2.6

3.6

1.0

1.5

2.0

MPL-90BRF

MPL-100BRF

MPL-120BRF

85,500

96,000

112,000

40F5

0.60 / 60°W

0.65 / 60°W

0.85 / 60°W

145 PSIG

0.75 USGPH

0.85 USGPH

1.00 USGPH

2.25

2.5

0.0

0.5

1.0

2.75

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Table A-4 Riello Balanced Flue (BF) Burner Set-Up

Riello Balanced Flue Series Oil Burners

(For use with sidewall vented units using outdoor combustion air)

Furnace

Model

Output

BTU/Hr

Burner

Model

Pump

Pressure

Turbulator

Setting

Nozzle

Flow Rate

WML-60CRB

WML-80CRB

WML-90CRB

59,500

75,000

85,600

40BF3

0.50 / 60°W

0.60 / 60°W

0.65 / 60°W

105 PSIG

115 PSIG

135 PSIG

0.51 USGPH

0.65 USGPH

0.75 USGPH

1.0

1.5

2.0

NOTE: Air gate setting may vary for sidewall vented units where air gate must be adjusted to achieve zero smoke.

system temperature rise. System

temperature rise is the difference

between the furnace outlet temperature

and furnace inlet temperature as

measured in the vicinity of the

connection between the plenum take-

offs and the trunk ducts

A.1 OIL BURNER AIR

ADJUSTMENT

A.2 BURNER ELECTRODES

Adjustment of the electrode tips with

respect to each other, the nozzle, and

to the rest of the burner is very

important to ensure smooth start-ups

and to permit efficient combustion.

For complete details, consult the oil

burner instruction manual provided in

the furnace documents envelope.

Beckett AF Burner

Perform a smoke spot test. The smoke

spot should not exceed No. 1 on the

Bacharach Scale.

Adjust the air shutter by loosening the

locking screws and moving the air

shutter, and if necessary, the bulk air

band.

Electrode gap: 5/32 inch.

Distance above horizontal centerline:

5/16 inch. Older instruction sheets

specify 7/16 inch. The current

specification is 5/16 inch.

After the air adjustments have been

completed, re-check the draft pressure

at the test port on the burner mounting

plate as shown in Figure #6. The draft

should be adjusted to 0.02 inches w.c.

Beckett AFII Burner

Adjust the burner air supply by first

loosening the locking screw located on

the black dial to the right of the burner.

Turn the black dial clockwise to

increase the combustion air and

counter-clockwise to decrease the

combustion air. Re-tighten the locking

screw after obtaining the proper setting.

Distance ahead of nozzle: 1/16 inch.

“Z” dimension, the distance from the

front of the end cone (head) to the face

of the nozzle should be 1-1/8 inches. If

a ceramic head is used, the distance

from the end cone to the nozzle face is

increased to 1-3/8 inches.

In the United States, the Beckett AF

Burner may be equipped with Beckett's

"Inlet Air Shut-Off" to increase

efficiency. (Beckett Part No. AF/A

5861).

NOTE: USE OF THE INLET AIR

SHUT-OFF COULD CAUSE POST

COMBUSTION NOZZLE DRIP.

Riello 40 Series (Chimney Vented)

Riello 40F, & BF Burners

Riello burners are factory set with

respect to nozzle size; pump pressure,

air gate and turbulator adjustments for

each model and firing rate. By

removing the burner cover and

loosening the screws that secure the

air adjustment plate, the combustion air

can be adjusted. Move the adjusting

plate to either increase or decrease

combustion air. When the proper air

setting is achieved, retighten the fixing

screws.

Electrode gap: 5/32 inch.

A.4 SPECIAL INSTRUCTIONS

FOR UNITS EQUIPPED WITH

RIELLO BURNERS

Distance above horizontal centerline:

13/64 inch.

Distance ahead of nozzle: 5/64 to 7/64

inch.

Riello burners are factory set with

respect to nozzle size, pump pressure,

air gate and turbulator adjustments for

each model and firing rate; therefore,

do not use the above listed set up

procedures.

A.3 START UP

The furnace should be operated for a

minimum of 15 minutes to reach steady

state conditions before fine tuning

combustion. The warm up time is ideal

for testing the oil pump pressure.

Riello specifications are listed in Tables

A-3 and A-4. Consult the Riello

Installation Instructions supplied with

the Burner for specific information

Riello Balanced Flue (BF) Series

Riello burners are factory set with

respect to nozzle size; pump pressure,

and turbulator adjustments for each

model and firing rate. The combustion

air can be adjusted with the burner

cover on by first removing the plastic

cover on the top right hand side of the

burner cover. With a Philips head

screw driver, turn the adjustment screw

clockwise to increase combustion air or

Drill a 1/4-inch test port in the venting

between the furnace flue outlet and

draft regulator (barometric damper).

Insert a stack thermometer and note

the flue gas temperature. The flue

gases should be within a range of

350°F to 450°F. If the flue gases are

below the range, it may be necessary

to slow down the blower fan. If the flue

gases are above the range, the blower

fan may require speeding up. Stack

temperature varies directly with the

concerning

operation,

burner

and

adjustments,

trouble-shooting.

counter-clockwise

decrease

combustion air. When the combustion

air is set, re-insert the plastic cover.

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Table A-6 Direct Drive Blower Set-Up

Blower Set-Up

Cooling Capacity

Power

Furnace

Model

Blower

0.20 in. w.c.

0.50 in. w.c.

Tons

CFM Range

Speed

Motor

Speed

Motor

WML-60C

WML-80C

WML-90C

GT10 DD

Low

½ HP

Med-Low

Med-High

High

½ HP

763 – 1505

Med-Low

Med-High

MPL-90B

MPL-100B

MPL-120B

MPL-130B

GT12-10DD

Low

Med-High

High

¾ HP

Med-High

High

¾ HP

1185 – 1553

High

Table A-8 Direct Drive Blower Characteristics

CFM

External Static Pressure – Inches w.c.

Furnace

Model

Blower

Motor HP

Motor FLA

∆T

Speed

0.20

0.30

0.40

0.50

LOW

MED-LOW

MED-HIGH

HIGH

813

797

763

1170

1423

1505

1144

1381

1444

1118

1291

1359

1063

1220

1291

WML-C

60 - 90

GT10

½ HP

¾ HP

7.0

45-75°F

LOW

MED-LOW

MED-HIGH

HIGH

1334

1389

1423

1553

1286

1332

1373

1491

1239

1287

1326

1449

1185

1236

1289

1331

MPL-B

90-130

GT12-10DD

12.5

50-80°F

TIP:

These Formulae will assist with the design of the ductwork and the determination of airflow delivery:

Bonnet Output

CFM =

SystemTemperatureRise=

1.085x SystemTemperatureRise

1.085x CFM

(

)

(

)

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Table A-9 General Dimensions (Inches)

Plenum Openings

Cabinet

Filter

Flue

Diameter

Furnace

Model

Shipping

Weight

Return

Width

Depth

Height

Supply

D x E

Type

Size

Side

Bottom

WML-C

MPL-B

22-1/8

22-1/4

55-1/4

19 x 19

18 x 18

Permanent

20 x 20 x 1

265

292

20-1/2 x 20-

1/2

22-1/4

18 x 18

WML-C &

MPL-B

Down flow

WML-C & MPL-B

Horizontal

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APPENDIX B: WIRING DIAGRAMS

Beckett AF Burner Wiring Diagram

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Beckett AFII Burner Wiring Diagram

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Riello 40F3 and F5 Burner Wiring Diagram

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Riello 40BF3 Burner Wiring Diagram

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resume operation and continue until the

thermostat is satisfied. Restore the

thermostat setting to a comfortable

temperature.

OPERATION OF OIL BURNER

Once the furnace flue pipe, electrical

and oil line connections have been

made, use the following instructions to

set the burner:

Set the heat anticipator adjustment in

the thermostat (if so equipped), by

removing the "R" or "W" wire to the

thermostat, then reading the amperage

draw between the two wires. Failure to

remove one of the wires from the

thermostat while performing this test

Shut off the electrical power to the

furnace.

Install an oil pressure gauge to the

pressure port on the oil pump. (Refer to

the oil pump specification sheet

included with the burner instructions).

could burn out

the heat anticipator.

Set the heat anticipator to the

amperage measured.

Restore electrical power to the furnace.

Start the furnace and bleed all air from

the fuel oil lines.

NOTE: THE FURNACE SHOULD BE

RUN THROUGH AT LEAST THREE

FULL CYCLES BEFORE LEAVING

THE INSTALLATION, TO ENSURE

Close the purge valve and fire the unit.

Allow the furnace to warm up to normal

operating temperatures. During this

time, set the pump pressure in

accordance with the data provided in

Appendix A, Table A-2, and A-5.

THAT

ALL

CONTROLS

ARE

OPERATING PROPERLY AND AS

EXPECTED.

NOTE:

POSITIVE

ALL JOINTS IN ANY

PRESSURE VENTING

SYSTEM MUST BE CHECKED FOR

LEAKS BEFORE LEAVING THE

INSTALLATION SITE.

When the furnace has reached "steady

state" (after approximately 15 minutes).

Set combustion air damper to get a

TRACE of smoke.

Check the system temperature rise.

The temperature rise is the difference

between the return air temperature

measured at a point near the return air

inlet, and the supply air temperature

measured near the furnace outlet. If the

temperature rise is too high, the airflow

must be increased. If the temperature

rise is too low, the fan should be

slowed down.

Turn off the burner. Observing the duct

thermometer in the supply air stream,

note the temperature at which the

blower fan stops. The fan adjustments

can be made by moving the dipswitch

settings on the timer control board for

fan off delay.

To check the operation of the limit

switch, shut off power to the furnace.

Temporarily remove the neutral wire

from the direct drive blower motor.

Restore the electrical power to the

furnace and set the thermostat above

room temperature. After three or four

minutes of burner operation, the limit

control should turn the burner off.

When the limit function test is

complete, shut off electrical power to

the furnace, replace the neutral wire to

the blower fan motor, and then restore

power. The blower fan will start up

immediately. Once the temperature has

dropped and the limit control has reset,

the fan will operate until the fan off time

is achieved. The oil burner will then

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APPENDIX C-R7184 TROUBLESHOOTING

R7184 DETAILED SEQUENCE OF OPERATION (FIGURE 7)

Power is applied to unit. The R7184 completes a self-diagnostic procedure. If no light or flame is present, and unit

passes its self-diagnostic procedure, the control enters into the idle mode.

Thermostat calls for heat:

A) Safety check is made for flame (4 second delay).

1) If flame is not present, the R7184 will apply power to the burner motor and igniter.

2) If flame is present, the control remains in the idle state.

B) Unit enters a pre-purge period of 15 seconds.

C) After 10 seconds, control checks for flame presence.

1) If flame is not present, the R7184 enters the trial for ignition state.

2) When flame is present, the control enters lock out mode.

D) Control monitors the burner flame.

1) When flame is present, the control enters ignition carryover state. (Continues to spark for 10 sec.).

a) Provides continuous spark after flame is sensed to assure that burner remains lit.

b) Turns on LED diagnostic light.

c) Starts carryover timer.

(i)

Flame and call for heat are monitored.

•

If flame is lost and lockout timer has not expired, R7184 will return to trial for ignition state.

If flame is lost and lockout timer has expired, R7184 will enter the recycle state.

♦

Recycle timer starts.

Burner motor and igniter and solenoid valve are turned off.

LED diagnostic light flashes slowly.

E) Carryover timer expires.

1) Enters run state.

a) Igniter turns off.

Combustion continues until thermostat is satisfied, or R7184 detects a loss of flame and enters into Recycle Mode.

F) Thermostat is satisfied - call for heat is terminated:

a) R7184 shuts off burner motor and solenoid valve.

(i)

If control utilizes a blower motor off delay, after 30 seconds, flame presence is checked.

If flame is not present, the R7184 LED diagnostic light is off and returns to idle state.

If flame is presence is detected, the control enters lock out mode.

•

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R7184 INTERRUPTED ELECTRONIC OIL PRIMARY CONTROL

FIGURE 7

ELECTRONIC FAN TIMER BOARD ON CONTROL PANEL

FIGURE 8

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IDLE STATE

THERMOSTAT CALLS FOR HEAT

R7184

SEQUENCE of

OPERATION

SAFETY CHECK FOR FLAME (5 SEC.)

REMAINS IN IDLE STATE

FLAME

NO FLAME

BURNER MOTOR & IGNITOR START

10 SEC.

SAFETY CHECK FOR FLAME (5 SEC.)

NO FLAME

FLAME

SOLENOID VALVE OPENS

LOCKOUT STATE

TRIAL FOR IGNITION

R7184:

•

Shuts off burner motor

Shuts off igniter

Shuts off Solenoid Valve

Fast Flashes LED Diagnostic

Light

BURNER FLAME MONITORED

NO FLAME

FLAME

CARRYOVER STATE

•

Provides continuous spark

LED diagnostic light ON

Start Carryover Timer

FLAME LOST

TO EXIT LOCKOUT

PRESS RESET

FLAME

CARRYOVER TIMER EXPIRES

FLAME LOST

FLAME

RUN STATE

•

Igniter turns off.

RECYCLE TIMER STARTS

R7184:

THERMOSTAT SATISFIED

R7184 SHUTS OFF:

Burner Motor

Solenoid Valve

•

Shuts off Solenoid Valve

Shuts off Igniter

Shuts off Burner Motor

Slow Flashes LED

diagnostic light

•

LED Diagnostic Light

30 SEC.

SAFETY CHECK FOR FLAME (5 SEC.)

RECYCLE TIMER EXPIRES

(60 SECONDS

NO FLAME

FLAME

RETURNS TO IDLE STATE

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Table C-1: ELECTRONIC FAN TIMER BOARD (EFT) DETAILED SEQUENCE OF OPERATION

Mode

Action

System Response

a. EFT closes oil primary control T - T connections).

b. Ignition system and R7184 oil primary control start the furnace. Oil flows as long as

the oil primary control senses flame.

Thermostat calls for heat. ("W"

terminal is energized).

c. Burner motor is energized and heat "fan on" delay timing begins. When timing is

complete, the circulator fan is energized at heat speed.

a. R7184 oil primary control is de-energized, terminating the burner cycle.

b. Heat "fan off" delay timing begins. Length of delay depends on EFT dipswitch

settings. When timing is complete, the circulator fan is de-energized.

c. EFT returns to standby mode, (Oil primary control and circulator fan are off, unless

continuous fan operation is selected at the thermostat).

Thermostat ends call for heat.

("W" terminal is de-energized).

HEAT

a. Oil primary control locks out within lockout timing, (30 seconds).

b. Burner motor is de-energized. (Even though thermostat is still calling for heat).

Burner fails to light.

c. If circulator fan has started, it continues through the selected heat “fan off” delay

period.

Burner motor is de-energized and oil primary control goes into recycle mode.

If the selected heat “fan off” delay timing is longer than the recycle delay

timing, the circulator fan continues to run through the next trial for ignition.

Established flame fails.

Thermostat begins call for

cool. (G and Y terminals are

energized).

a. Cooling contactor is energized immediately.

b. Circulator fan is energized at cool speed.

COOL

FAN

Thermostat ends call for cool.

(G and Y terminals are de-

energized).

a. Cooling contactor is de-energized immediately.

b. Circulator fan turns off immediately.

Thermostat begins call for fan.

(G terminal is energized).

a. Circulator fan is energized immediately at cooling speed.

a. Circulator fan is de-energized immediately.

Thermostat ends call for fan.

(G terminal is de-energized).

a. Oil primary control shuts off burner.

b. Circulator fan is energized immediately at heat speed.

c. EFT opens oil primary control T - T connections. Circulating fan runs as long as

limit string stays open.

Limit switch string opens.

d. If there is a call for cooling or fan, the circulating fan switches from heating to

cooling speed.

a. EFT begins heat “fan off” delay sequence.

LIMIT

b. Circulating fan turns off after the selected heat “fan off” timing.

c. EFT re-closes oil primary control T - T connections.

d. Oil primary control is energized, initiating burner light off.

Limit switch string closes

(with existing call for heat).

Circulator fan turns off when heat “fan off” delay time is complete.

Normal operation resumes; EFT control is in standby mode awaiting next

thermostat command.

Limit switch string closes

(without existing call for heat).

a. Circulating fan is energized when there is no call for heat, cool, or fan.

Continuous circulating fan is

connected.

FAN

EAC

b. If fan operation is required by a call for heat, cool, or fan, the EFT switches off the

continuous fan speed tap before energizing the other fan speed.

•

Electronic air cleaner (EAC) connections are energized when the heat or cool

speed of the circulator fan is energized. EAC connections are not energized when

the optional continuous fan terminal is energized.

Electronic Air Cleaner is

connected.

HUM Humidity control is connected.

•

Humidifier connections are energized when the oil burner motor is energized.

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R7184 LED DIAGNOSTIC LIGHT

TROUBLESHOOTING

The LED diagnostic light has several

functions. It indicates the state or mode

in which the oil burner is operating. It will

also indicate fault conditions, and help

determine cad cell resistance while the

burner is operating.

IMPORTANT: Due to the potential

hazard of line voltage, only a trained,

experienced service technician should

perform the troubleshooting procedure.

Electrical Shock Hazard.

Troubleshooting is done with the system

powered. Be careful to observe all

necessary precautions to prevent

electrical shock or equipment damage.

PRELIMINARY STEPS:

Check the diagnostic light for indications

of burner condition. Refer to R7184 LED

DIAGNOSTIC LIGHT section for details.

NORMAL CONDITIONS:

PRELIMINARY CHECKS:

The LED diagnostic light will turn on

when the burner enters the carryover

state; the point at which ignition spark is

on, and will remain on through the run

state, where the ignition spark is

terminated but the burner continues to

fire.

Make sure that limit switches are closed

and those contacts are clean.

Check for line voltage power on the oil

primary control black and white lead

wires.

WHEN SIMULATING A CALL FOR

HEAT AT THE R7184, DISCONNECT

AT LEAST ONE THERMOSTAT LEAD

WIRE FROM THE T1 - T2 TERMINALS

TO PREVENT DAMAGE TO THE

THERMOSTAT. NEGLECTING THIS

PROCEDURE MAY BURN OUT THE

Refer to Table C-4 or C-5 for further

troubleshooting information.

The LED diagnostic light will turn off at

the end of the burner cycle as the R7184

enters the idle state, and will remain off

until the next heating cycle.

HEAT

ANTICIPATOR

FAULT CONDITIONS:

STANDARD 24 VAC THERMOSTAT,

OR CAUSE HARM TO COMPONENTS

If the LED diagnostic light is flashing

quickly; 1 Hz (½ second on / ½ second

off), the R7184 is in the lockout state or

in restricted mode. To exit the lockout

state, press the reset button.

WITHIN

MICRO-ELECTRONIC

THERMOSTAT.

Before checking the oil primary control,

perform these preliminary checks, (repair

or replace controls as necessary):

If the LED diagnostic light is flashing

slowly; ¼ Hz (2 seconds on / 2 seconds

off), the R7184 is in the recycle state.

This indicates that flame sensing was

lost after the lockout timer expired during

the ignition carryover state. The R7184

will return to the idle state within 60

seconds.

•

Check the power supply; fuse

box or breaker, any service switches, all

wiring connections, and burner motor

reset button (if equipped).

•

Check the limit switches to

ensure that the switch contacts are

closed.

CAD CELL CONDITION:

•

Check the electrode gap and

If the LED diagnostic light is off, the cad

cell is not sensing flame.

position.

•

Check the contacts between the

oil primary control and the electrodes.

If the LED diagnostic light is on, the cad

cell is sensing flame, or viewing ambient

light.

•

Check oil supply (tank gauge).

Check the oil nozzle, oil filter,

The resistance of the cad cell may be

checked while the R7184 is in the run

state by pressing the reset button. The

LED diagnostic light will flash the

following code:

and oil valves.

•

Check the piping or tubing to

the oil tank.

TABLE C-2: CAD CELL RESISTANCE

•

Check the oil pump pressure.

CHECK OIL PRIMARY CONTROL AND

IGNITER

Flashes

Resistance in Ohms

Less than 400

If the trouble does not appear to be in

the burner or ignition hardware, check

the oil primary control and the igniter by

using the following equipment:

Between 400 - 800

Between 800 – 1600

Between 1600- 5000

Screwdriver.

Voltmeter (0 - 150 VAC)

Insulated jumper wires with both ends

stripped.

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Table C-3: R7184 TROUBLESHOOTING

Condition: Burner motor does not start when there is a call for heat.

Procedure

Status

Corrective Action

1. Check that limit switches are

closed and contacts are clean.

N/A

2. Check for line voltage power at

the oil primary control. Voltage

should be 120 Vac between the

black and white lead wires on

the oil primary control.

N/A

3. Check indicator light with burner

off, no call for heat (no flame).

Cad cell is defective, sees external light, or connections have

shorted. Go to step 4.

Indicator light is on.

Indicator light turns off.

Eliminate external light source or permanently shield cad cell.

•

Replace cad cell with new cad cell and recheck.

If indicator light does not turn off, remove yellow lead wires

from R7184 and recheck.

4. Shield cad cell from external

light.

Indicator light stays on.

•

If indicator light is still on, replace the R7184 control.

If the indicator light turns off, replace cad cell bracket

assembly.

5. Verify that the oil valve is closed

during the “valve on delay”

period by opening view port and

verifying that no flame is present

during the 15-second “valve on

delay”.

Indicator light is on.

Burner starts.

If flame is present, replace the oil valve.

Trouble is in thermostat circuit. Check thermostat-wiring

connections.

6. Jumper thermostat (T -T)

terminals on R7184

If connections are clean and tight, check thermostat wires for

continuity.

•

Disconnect line voltage power and open line switch.

Check all wiring connections.

IMPORTANT

First remove one thermostat lead

wire.

Tighten any loose connections and recheck.

Burner does not start.

•

If burner still doesn't start, replace R7184.

If burner still doesn't start, check the oil burner motor. It may be

seized or burned out.

Condition: Burner starts then locks out on safety with indicator light flashing at 1/2 second on, 1/2 second off.

Procedure

Status

Corrective Action

Indicator light stops flashing.

Go to Step 8.

7. Reset oil primary control by

pushing in and releasing red

reset button.

Indicator light continues to flash

at 1/2 second on, 1/2 second off

rate.

Verify that the control is not in restricted mode. (See notes at end of

this table.). If not in restricted mode, replace R7184

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Condition: Burner starts then locks out on safety with indicator light flashing at 1/2 second on, 1/2 second off. (Cont.)

Procedure

Status

Corrective Action

Spark igniter could be defective. Check for line voltage at igniter

terminals. If line voltage is present, replace R7484.

Ignition is off

8. Listen for spark after burner

turns on (after 2 second delay).

Ignition is on.

Go to Step 9.

Ignition is on but no oil is being

sprayed into the combustion

chamber.

Wait for “Valve ON” delay to complete. Check oil supply, and oil line

valve. Check for filter blockage or seized oil pump.

Indicator light is on until the

control locks out and starts Replace R7184

flashing during lockout.

9. Check indicator light after flame

is established, but before oil

primary control locks out.

Indicator light stays off.

Burner locks out.

Go to step 10.

10. Check cad cell sighting for view

of flame.

a. Disconnect line voltage power

and open line switch.

Go to step 11.

b. Unplug cad cell and clean cad

cell face with soft clothe.

Check sighting for clear view

of flame. Replace cad cell in

socket.

Burner keeps running.

Indicator light is on.

System is OK.

c. Reconnect line voltage power

and close line switch.

d. Start burner.

11. Check cad cell.

a. Disconnect line voltage power

and open line switch.

Remount control onto burner housing. Go to step 6.

b. Remove existing cad cell and

replace with new cad cell.

c. Disconnect all wires from

thermostat

terminals

ensure that there is no call for

heat.

Indicator light is off.

Go to step 12.

d. Reconnect line voltage power

and close line switch.

e. Expose new cad cell to bright

light such as a flashlight.

12. Check cad cell bracket

assembly.

a. Disconnect line voltage power

and open line switch.

Indicator light is on.

Indicator light is off.

Replace cad cell bracket assembly.

b. Remove cad cell wires from

quick connect connectors on

the R7184 and leave control

lead wires open.

c. Apply power to device.

Replace R7184.

d. Place jumper across cad cell

terminals after burner motor

turns on.

NOTE: Restricted Mode - (Limited Reset): In order to limit the accumulation of unburned oil in the combustion chamber, the control can be reset

only 3 times, after which, the control locks out. The reset count returns to zero each time a call for heat is successfully completed.

To reset from RESTRICTED MODE: press and hold the reset button for 30 seconds. When the LED flashes twice, the device has reset.

NOTE: Disable function: Pressing and holding the reset button will disable all functions until the button is released. The burner will restart at the

beginning of the normal heat cycle on SAFETY CHECK.

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TABLE C4: SYSTEM AND GENERAL TROUBLESHOOTING

Problem

Possible Cause

Remedy

Check thermostat and adjust. Also, check thermostat for accuracy; if it is

a mercury switch type, it might be off level.

Thermostat not calling for heat.

Check furnace switch, main electrical panel furnace fuse or circuit

breaker. Also look for any other hand operated switch, such as an old

poorly located furnace switch, which was not removed during furnace

replacement.

No power to furnace.

Thermostat faulty.

Furnace will not start.

Remove thermostat wires from oil primary control terminals T-T. Place a

jumper across T-T. If furnace starts, replace thermostat, thermostat sub-

base (if equipped), or both.

Check reset button on oil primary control. Remove thermostat wires

from oil primary control terminals T1 - T2. Check for 24v across T -T. If

no voltage is present, check for 115v to oil primary control. If 115v is

present, go to Table C-3.

Oil primary control faulty.

Photo Cell wiring shorted or room

light leaking into photo cell

compartment

Check photo cell (cad cell) wiring for short circuits. Also, check for room

light leaking into cad cell compartment. Repair light leak if necessary.

See Table C-3.

Furnace will not start.

Check for open limit or auxiliary limit. Also, check internal wiring

connections; loose connectors, etc.

Open safety switch.

No fuel oil.

Check fuel oil supply. Check that all hand operated fuel oil valves are in

the open position. Fill oil storage tank if necessary.

Replace nozzle with high quality replacement. Use rating plate or Tables

in Appendix A as a guide.

Clogged nozzle.

Clogged oil filter.

Replace oil tank filter or in-line filter if used.

Furnace will not start without

first pushing oil primary

control reset button.

Connect pressure gauge to oil pump. Adjust pump pressure, or replace

oil pump if necessary. Ensure that erratic pressure readings are not

caused by defective fuel oil line.

Low oil pump pressure.

(Happens on frequent basis)

Air getting into fuel oil lines, or fuel

oil line dirty, clogged, or in some

manner defective.

Check fuel oil lines. Replace any compression fittings found with high

quality flared fittings. Check for any signs of oil leaks. Any oil leak is a

potential source of air or contaminants.

Check burner motor. If burner motor is cutting out on over-load,

determine why. Replace if necessary.

Defective burner motor.

Photo Cell (Cad Cell) defective.

No fuel oil.

If cad cell is dirty, clean it. (Determine why cad cell is getting dirty). If

cad cell is poorly aimed, realign it. NOTE: The photocell should have a

resistance of 100K Ω in absence of light; a maximum of 1500 Ω in the

presence of light. Ensure that room light is not leaking into the cad cell

compartment. (See diagnostic light section).

Furnace starts, but cuts out

requiring manually resetting

the oil protector reset button.

Check fuel oil supply. Check that all hand operated fuel oil valves are in

the open position. Fill oil storage tank if necessary.

Replace nozzle with high quality replacement. Use rating plate or Tables

in Appendix A as a guide.

Clogged nozzle.

Clogged oil filter.

Replace oil tank filter or in-line filter if used.

Connect pressure gauge to oil pump. Adjust pump pressure, or replace

oil pump if necessary. Ensure that erratic pressure readings are not

caused by defective fuel oil line.

Low oil pump pressure.

Furnace starts, but cuts out

requiring manually resetting

the oil protector reset button.

Air getting into fuel oil lines, or fuel

oil line dirty, clogged, or in some

manner defective.

Check fuel oil lines. Replace any compression fittings found with high

quality flared fittings. Check for any signs of oil leaks. Any oil leak is a

potential source of air or contaminants.

Check burner motor. If burner motor is cutting out on over-load,

determine why. Replace if necessary.

Defective burner motor.

Water or contaminants in oil.

Frozen oil line.

Drain fuel oil storage tank, replace fuel oil. (Consult with fuel oil

supplier).

Gently warm oil line. Insulate oil line. (Outdoor piping size may require

increased diameter).

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TABLE C-4: SYSTEM AND GENERAL TROUBLESHOOTING continued

Problem

Possible Cause

Remedy

Electrodes out of adjustment or

defective.

Check electrode settings. Check electrodes for dirt build-up or cracks in

porcelain.

Poor transformer high voltage

Check contacts between the igniter and electrodes. If OK, replace the

igniter

connections

transformer.

defective

Oil burner sputtering at

nozzle

Fuel oil filter clogged.

Defective oil pump.

Replace fuel oil storage tank filter and / or fuel oil in-line filter.

Check burner motor / fuel oil pump coupling. Check oil pump pressure.

Replace fuel oil pump if necessary.

Fuel oil line partially clogged or

contains air.

Bleed air from oil line. If problem persists, replace oil line.

System temperature rise ideally should not exceed 85°F. Check for

clogged air filters. Check blower fan for excess dirt build-up or debris.

Speed up blower fan if necessary.

System temperature rise too high.

Check “fan off” delay timing setting. Use a duct thermometer in the

supply air plenum take-off or first few inches of the supply air trunk duct.

Ideally, the fan will shut off at a temperature of 90° - 100°F. Manipulate

the dip switch settings to come as close as possible to this “fan off”

temperature.

Poor “fan off” delay timing

selection, (fan stops too soon).

Excessive

fuel

oil

consumption.

Fuel oil leak.

Check fuel oil line for leaks. Repair or replace if necessary.

Check stack temperature. Stack temperatures will normally range from

350° to 450°F. Check draft regulator. Draft should be set to 0.02 in. w.c.

Stack temperature too high.

Check thermostat heat anticipator setting against measured amperage

draw. Increase heat anticipator setting if necessary. If the thermostat is

being influenced by drafts, sunlight, duct work, etc., relocate to more

suitable location.

Thermostat improperly adjusted or

in poor location.

Insufficient

adjustment at oil burner, or

improper draft pressure.

combustion

air

Adjust the oil burner combustion air band and draft regulator to gain the

highest practical CO₂or lowest practical O₂content in the flue gases.

See Burner Set Up.

Too much smoke.

Check for soot build-up in heat exchanger flue passages, especially in

the outer radiator.

Heat exchanger partially clogged.

Check alignment. Blast tube should be centered with fire pot burner

opening. Oil burner head should be ¼ inch back from the inside surface

of the fire pot.

Poor alignment between oil burner

blast tube and fire pot.

Soot building up on blast

tube (end coning).

Flame impingement caused by

Incorrect nozzle angle.

Check nozzle size and angle. (See Appendix A). Check distance from

head to inside surface of the fire pot.

Defective fire-pot

Check fire-pot. Repair or replace.

Clean or replace air filter.

Airflow blocked or dirty air filter.

Check thermostat heat anticipator setting against measured amperage

draw. Increase heat anticipator setting if necessary. If the thermostat is

being influenced by drafts, sunlight, duct work, etc., relocate to more

suitable location.

Thermostat

location.

adjustments

Check all dampers. Open closed dampers including registers in unused

rooms. Check system temperature rise. If temperature rise is too high,

speed up blower fan.

Insufficient airflow.

Furnace will not warm home

to desired temperature.

Test high limit function of all limit switches. Use a duct thermometer to

assess accuracy of limit control. Check for obstructions to airflow around

limit switch bi-metal elements. Replace control if necessary.

Defective high limit control.

Under-sized nozzle.

Check nozzle. If problem is not caused by air flow problems, use larger

nozzle, if permitted by rating plate.

Blower

intermittently on overload.

fan

motor

stopping

Check blower fan motor amperage draw. Check motor ventilation ports,

clean if necessary. Replace motor if necessary.

Burner motor

intermittently on overload.

Improper distribution of heat.

Check burner motor. Replace if necessary.

Home does not heat evenly

This is not likely to be a furnace problem. Balance duct system.

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TABLE C-4: SYSTEM AND GENERAL TROUBLESHOOTING continued

Problem

Possible Cause

Remedy

Airflow blocked or dirty air filter.

Clean or replace air filter.

Supply air temperature too

hot.

Check all dampers. Open closed dampers including registers in unused

rooms. Check system temperature rise. If temperature rise is too high,

speed up blower fan.

Insufficient airflow.

Excess airflow.

Check system temperature rise. Slow down blower fan if necessary.

Supply air temperature too

cool.

Check supply air ductwork. Seal leaky joints and seams. Insulate

ductwork if necessary.

Excessive duct losses.

Fan control "fan on" setting too

low.

Increase "fan on” dipswitch settings on EFT if control has this option.).

Supply air temperature too

cool during first moments of

furnace cycle.

Check supply air ductwork. Seal leaky joints and seams. Insulate

ductwork if necessary.

Excessive duct losses.

Where the circuit breaker or fuse is

located in the main electrical panel.

How and where to visually inspect the

venting system for leaks or other

problems.

FINAL CHECK OUT

ENSURE

DEVICES

THAT

AND

ALL

SAFETY

ELECTRICAL

Where the furnace switch is located,

and the switch "on" and "off" positions if

not obvious.

How to inspect, clean and replace the

air filter, and other homeowner

maintenance procedures.

COMPONENTS HAVE BEEN SET

FOR NORMAL OPERATION.

ENSURE THAT ALL ELECTRICAL

CONNECTIONS ARE TIGHT AND

THAT THE WIRING IS SECURE.

Where the oil shut-off valve from the oil

storage tank is located.

Who to call for emergency service and

routine annual service.

How to operate the thermostat, and

other related accessories.

The terms and conditions of the

manufacturer's warranty and the

IMPORTANT:

How to operate the manual reset button

on the primary control, and especially

when not to push the reset button.

contractor's

warranty.

Please ensure that the homeowner is

informed and understands:

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PARTS LISTING: COUNTERFLOW HORIZONTAL MODEL: WML C

Description

Ref. No.

PART NO.

Right and Left Side Panel

Rear Panel Baffle

Rear Panel

Blower Division Panel Assembly

Base Panel Assembly

Front Panel

30072L

27918

30272L

30311

29007

30073L

30074L

28673

Blower Access Door

Door Handle – P2-41

Logo Bezel

28479

Logo Label

28563

End Panel

29013L

27876

27068

2700WP

29873

29005

28722

2080175

21994

1061A

2080176

3011325A

21260

21306

2180032

28723

30239

28654

30268

30265

29388

Heat Exchanger Assembly

Firepot Retainer Bracket

Replacement Combustion Chamber

Oil Burner Mounting Plate Assembly

Flue Pipe Connecting Flange

Junction Box Cover

Pouch Gasket

Flue Pipe Gasket (2 per Unit)

Radiator Cleanout Cover Assembly

Cleanout Cover Gasket

Casing Clean-out Cover

Filter Frame

Filter Frame End Support

Air Filter – 20 x 20 x 1 (Permanent)

Junction Box

Channel Wire Retainer

Limit Control 60T11BOF L180º F

Wire Harness Control

Wire Harness Blower Direct drive

Fan Timer Control: Honeywell ST9103A or UTC 1158-150

Draft Regulator 5”

27494

Beckett oil Burner AF76BNHS

Burner Motor 1/7 HP 3450 RPM PSC

Beckett Clean-cut Oil Pump

Solid State Igniter

30288

29689

29688

29522

Primary Combustion Control R7184A

Flame Retention Head

Nozzle 0.65 / 80º A

29664

11961 (F3)

210086

30313

28142

26430

Blower Assembly, Complete, Direct Drive, ½ hp, 4-Speed

Blower Housing and Wheel, GT10 DD

Blower Wheel, GT10 DD

Blower Motor, ½ hp, 4-Speed

Motor Mounting Band – TR6884B

Motor Mount Arms – 10-10 DD Blower (3 per unit)

Motor Run Capacitor, 10 mfd @ 370 vac

Capacitor Strap

26088

17811

26251

27743

27760

Low Fire Kit

29880

Low Firing Rate Baffle

Nozzle, .50/80° A

25521101

29389

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PARTS LISTING: COUNTERFLOW HORIZONTAL MODEL: WML C

Ref. No.

Description

Auxiliary Limit 60T11BOF L140º F

Transformer

Control Panel

Wire Harness, Junction Box to Control

Wire Harness, Supply

PART NO.

29198

27738

30190

30264

29366

30240

30195

Limit Cover, Left

Limit Cover, Right

PARTS LISTING: COUNTERFLOW HORIZONTAL DIRECT VENT MODEL: WML CB2U

Description PART NO.

Ref. No.

All parts are the same as listed on the previous pages for Model WML-C except where noted below.

Oil Burner Mounting Plate Assembly

Oil Burner Mounting Plate

Sight Glass Cover Plate

Sight Glass Gasket (2 per unit)

Sight Glass

Flue Connector Assembly 6” to 4” 90º Elbow

Pouch Gasket (Second gasket required for Direct Vent)

Flue Collar Gasket (Second gasket required for Direct Vent)

Beckett Oil Burner AFII 85

Burner Motor 1/7 HP 3450 RPM PSC

Beckett Clean-cut Oil Pump A2EA6520

Solid State Ignitor 10SAY-01

Primary Combustion Control R7184P

Air Tube Combination FBX80HGXS

Flame Retention Head (FB3)

29872

29867

29850

29870

29876

28952

2080175

21994

30069

28907

29688

28558

29649

28561

28533

28017

Nozzle, .60/60ºA (WML-80CB2U only)

PARTS LISTING: VESTIBULE KIT: WML C

Ref. No.

Description

PART NO.

30554

Vestibule Kit

Door Handle

Base Panel

28673

29019

Top Panel

Door Panel

Left Side Panel

Right Side Panel

21437L

29022L

30527L

30528L

PARTS LISTING: SUB BASE FOR COMBUSTIBLE FLOOR INSTALLATION: WML C

Ref. No.

Description

PART NO.

06000075

Sub Base

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PARTS LISTING: COUNTERFLOW HORIZONTAL MODEL: MPL

Ref. No.

Description

PART NO.

Right Side Panel

Left Side Panel

Side Panel Heat Exchanger Support (2 per unit)

Rear Panel

Blower Division Panel Assembly

Base Heat Exchanger Support

Front Panel

30360L

30351L

27038

30353L

30397

26975

30350L

30363L

28673

28479

28563

30352

30380

27068

27000WP

29873

29871

28306

2080175

21994

1061A

2080176

3011325A

21260

21306

2180032

28723

30239

29197

29662

30392

30391

29388

30364

29366

30240

30195

12240

27738

30355

30390

30393

Blower Access Door

Door Handle – P2-41

Logo Bezel

Logo Label

End Panel

Heat Exchanger Assembly

Firepot Retainer Bracket

Replacement Combustion Chamber

Oil Burner Mounting Plate Assembly

Inspection Door Gasket

Flue Connector

Pouch Gasket

Flue Pipe Gasket

Radiator Cleanout Cover Assembly

Cleanout Cover Gasket

Casing Clean-out Cover

Filter Frame

Filter Frame End Support

Air Filter – 20 x 20 x 1 (Permanent)

Junction Box

Channel Wire Retainer

Limit Control 60T11BOF L150º F

Limit Control 60T11BOF L160º F

Wire Harness Junction Box to Control

Wire Harness Blower Direct drive

Fan Timer Control: Honeywell ST9103A or UTC 1158-150

Air Baffle

Wire Harness, Supply

Limit Cover, Left

Limit Cover, Right

Draft Regulator 6”

Transformer

Control Panel

Wire Harness Burner to Timer Board

Wire Harness Transformer to Timer Board

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PARTS LISTING: COUNTERFLOW HORIZONTAL MODEL: MPL

Description

PART NO.

Ref. No.

Beckett oil Burner AF76XN

30389

29689

29688

29522

29664

Burner Motor 1/7 HP 3450 RPM PSC

Beckett Clean-cut Oil Pump A2EA6520

Solid State Ignitor FRANCE 10SAY-04

Primary Combustion Control R7184A

Air Tube Combination AF76XN

27610

Flame Retention Head (MPL 80, to 120)

Flame Retention Head (MPL 130)

Nozzle 1.00 / 60º A (MPL 120)

11961 (F3)

12646 (F6)

27104

Nozzle 1.10 / 70º A (MPL 130)

2100101

Blower Assembly, Complete, Direct Drive, ½ hp, 4-Speed

Blower Housing and Wheel, GT12-10 DD

Blower Wheel, GT12-10 DD

30387

17559

29692

27161

17811

17812

27745

29026

Blower Motor, 3/4 hp, 4-Speed

Motor Mounting Band – TR6884B

Motor Mount Arms – 12-12 DD Blower (3 per unit)

Motor Run Capacitor, 20 mfd @ 370 vac

Blower Slide Rail

Auxillary Limit L130°F 60T11 BOF

Junction Box Cover

30388

28722

PARTS LISTING: COUNTERFLOW HORIZONTAL DIRECT VENT MODEL: MPL BB2U

Description

PART NO.

Ref. No.

All parts are the same as listed on the previous pages for Model MPL-B except where noted below.

Oil Burner Mounting Plate Assembly

Oil Burner Mounting Plate

29872

29867

29850

29870

29876

28952

2080175

21994

30430

28907

29688

28558

29649

28561

28533

Sight Glass Cover Plate

Sight Glass Gasket (2 per unit)

Sight Glass

Flue Connector Assembly 6” to 4” 90º Elbow

Pouch Gasket (Second gasket required for Direct Vent)

Flue Collar Gasket (Second gasket required for Direct Vent)

Beckett Oil Burner AFII 150

Burner Motor 1/7 HP 3450 RPM PSC

Beckett Clean-cut Oil Pump A2EA6520

Solid State Ignitor 10SAY-01

Primary Combustion Control R7184P

Air Tube Combination FBX80HGXS

Flame Retention Head (FB3)

Nozzle, 0.85/70ºA (MPL-120BB2U only)

PARTS LISTING: SUB BASE FOR COMBUSTIBLE FLOOR INSTALLATION: MPL B

Ref. No.

Description

PART NO.

006000073

Sub Base

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HOMEOWNER’S REFERENCE TABLE

Model No.

Serial No.

Date Installed

Contractor

Contact

Address

Postal Code

Telephone No.

After Hours No.

FUEL SUPPLIER

Fuel Oil Supplier

Contact

Telephone No.

After Hours No.

IF DIFFERENT FROM INSTALLATION CONTRACTOR:

Service Tech.

Telephone No.

After Hours No.

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NOTES:

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6800 Base Line, Wallaceburg, Ontario, N8A 5E5, Can. Tel: (519) 627-0791 Fax: (519) 627-4719

2201 Dwyer Avenue, Utica, New York, 13504, USA. Tel: (315) 797-1310 Fax: (315) 724-9319

85 Middle Road, Dunkirk, New York, 14048, USA Tel: (716) 366-5500 Fax: (716) 366-1209

www.ecrinternational.com

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