Burnham MPO, MPO84, MPO147, MPO189, MPO231 Installation & Service Instructions Manual

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ROFSNOITCURTSNIECIVRES

OPM

RELIOBLIOSSAP-3

As an
ENERGY STAR
Burnham Hydronics
has determined that the
MPO84, MPO147, MPO189
and MPO231 meet the
ENERGY STAR
guidelines for Energy
effi ciency established by the
United States Environmental
Protection Agency (EPA).

®

Partner,

®

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100103-01R3-10/05

Price - $3.00

IMPORTANT INFORMATION - READ CAREFULLY

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SRELIOBASU

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The following terms are used throughout this manual to bring attention to the presence of hazards

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of various risk levels, or to important information concerning product life.

REGNAD

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2

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3

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4

STNETNOCFOELBAT

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5

6

Figure 1: MPO 84 Thru MPO 231 Water Boiler

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741OPM"8/5-22"42"680.1192.02545

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TABLE 1A: DIMENSIONAL DATA (SEE FIGURE 1)

48OPM"8/5-61"42"507.792.31034

HPGHBM

132OPM"8/5-43"63"748.7192.43177

981OPM"8/5-82"03"664.4192.72856

.1:

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TABLE 1B: RATING DATA

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741OPM50.17419212116 8X8510.78

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48OPM06.04847466 8X8510.78

132OPM56.11323027717 8X8510.78

981OPM53.19817615417 8X8510.78

7

SECTION I: PRE-INSTALLATION

A. INSPECT SHIPMENT carefully for any signs of

damage.

1. All equipment is carefully manufactured, inspected
and packed. Our responsibility ceases upon delivery
of crated boiler to the carrier in good condition.

2. Any claims for damage or shortage in shipment
must be fi led immediately against the carrier by the
consignee. No claims for variances from, or shortage
in orders, will be allowed by the manufacturer
unless presented within sixty (60) days after receipt
of goods.

B. LOCATE BOILER in front of fi nal position before

removing crate. See Figure 1.

1. LOCATE so that vent pipe connection to chimney
will be short and direct.

2. BOILER IS SUITABLE FOR INSTALLATION
ON COMBUSTIBLE FLOOR. Boiler cannot be
installed on carpeting.

3. FOR BASEMENT INSTALLATION, provide
a solid elevated base, such as concrete, if fl oor is
not level, or if water may be encountered on fl oor
around boiler.

4. PROVIDE RECOMMENDED SERVICE
CLEARANCE, if applicable, as follows:

a. Clearance from Jacket Front Panel -

• 24" for servicing burner

• 24" for fl ueway cleaning (MPO84 & 147)

• 30" for fl ueway cleaning (MPO189)

• 36" for fl ueway cleaning (MPO231)

b. Clearance from Jacket Left Side Panel -

• 19" for burner swing door, if opened fully
with burner mounted, otherwise 1" with
burner removed

• 12" access clearance to service rear of
boiler if right side clearance is less
than 12"

• 1" minimum if right side clearance is 12" or
larger to access and service rear of boiler.

c. Clearance from Jacket Right Side Panel -

• 3" minimum if left side clearance is 12" or
larger to access and service rear of boiler.

d. Clearance from Jacket Rear Panel -

• 12" minimum for rear smokebox cleaning

(Note: This dimension will also be

controlled by horizontal to vertical to
horizontal smokepipe arrangement - See
Figures 2 and 16.)

5. For minimum clearances to combustible materials.
See Figure 2.

ECITON

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Figure 2: Minimum Installation Clearances To Combustible Materials (Inches)

NOTES:

1. Listed clearances comply with American National Standard
ANSI/NFPA 31, Installation of Oil Burning Equipment.

2. MPO boilers can be installed in rooms with clearances from

8

combustible material as listed above. Listed clearances cannot

be reduced for alcove or closet installations.

3. For reduced clearances to combustible material, protection
must be provided as described in the above ANSI/NFPA 31
standard.

C. PROVIDE COMBUSTION AND VENTILATION

AIR. Local and National Codes may apply and should

be referenced.

GNINRAW

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1. Determine volume of space (boiler room). Rooms
communicating directly with the space in which
the appliances are installed, through openings not
furnished with doors, are considered a part of the
space.

Volume(ft3) = Length(ft) x Width(ft) x Height(ft)

2. Determine total input of all appliances in the space.

Add inputs of all appliances in the space and round

the result to the nearest 1000 BTU per hour.

3. Determine type of space. Divide Volume by total
input of all appliances in space. If the result is
greater than or equal to 50 ft3/1000 BTU per hour,
then it is considered an unconfi ned space. If the
result is less than 50 ft3/1000 BTU per hour then the
space is considered a confi ned space.

4. For boiler located in an unconfi ned space of a
conventionally constructed building, the fresh
air infi ltration through cracks around windows
and doors normally provides adequate air for
combustion and ventilation.

5. For boiler located in a confi ned space or an
unconfi ned space in a building of unusually tight
construction, provide outdoor air.

a. Outdoor air for combustion may be provided

with an optional Burnham MPO (V8) Inlet Air
Accessory Kit, Part Number 611280031 (only

available and suitable for use on Beckett AFG
with burner enclosure cover burner). See

Section V for installation details.

or
b. Outdoor air may be provided with the use of two

permanent openings which communicate directly
or by duct with the outdoors or spaces (crawl or
attic) freely communicating with the outdoors.
Locate one opening within 12 inches of top
of space. Locate remaining opening within 12
inches of bottom of space. Minimum dimension
of air opening is 3 inches. Size each opening per
following:

i. Direct communication with outdoors.

Minimum free area of 1 square inch per
4,000 BTU per hour input of all equipment
in space.

ii. Vertical ducts. Minimum free area of 1

square inch per 4,000 BTU per hour input of
all equipment in space. Duct cross-sectional
area shall be same as opening free area.

iii. Horizontal ducts. Minimum free area of 1

square inch per 2,000 BTU per hour input of
all equipment in space. Duct cross-sectional
area shall be same as opening free area.

Alternate method for boiler located within

confi ned space. Use indoor air if two

permanent openings communicate directly
with additional space(s) of suffi cient volume
such that combined volume of all spaces
meet criteria for unconfi ned space. Size each
opening for minimum free area of 1 square
inch per 1,000 BTU per hour input of all
equipment in spaces, but not less than 100
square inches.

6. Louvers and Grilles of Ventilation Ducts
a. All outside openings should be screened and

louvered. Screens used should not be smaller
than 1/4 inch mesh. Louvers will prevent the
entrance of rain and snow.

b. Free area requirements need to consider the

blocking effect of louvers, grilles, or screens
protecting the openings. If the free area of the
louver or grille is not known, assume wood
louvers have 20-25 percent free area and metal
louvers and grilles have 60-75 percent free area.

c. Louvers and grilles must be fi xed in the open

position, or interlocked with the equipment to
open automatically during equipment operation.

9

SECTION II: PACKAGED BOILER ASSEMBLY - TRIM & CONTROLS

A. REMOVE CRATE.

1. Remove all fasteners at crate skid.

2. Lift outside container and remove all other inside
protective spacers and bracing. Remove burner and
miscellaneous parts cartons.

B. REMOVE BOILER FROM SKID.

1. To reduce the risk of damage to boiler jacket, use
the following procedure to remove from skid, see
Figure 3:

Step 1. Boiler is secured to base with (4) 5/16" cap

screws, (2) in front and (2) in rear of shipping
skid, see Figure 3. Remove all securing
hardware.

Step 2. Place wooden block(s) 12" from rear of

skid as shown (one piece 4" x 4" x 16" lg. or two
pieces of 2" x 4" x 16" lg.)

Step 3. Insert 1" Sch. 40 pipe handles through leg

hole in front and rear legs. Center end of pipe on
wooden blocks as shown in Figure 3.

NOTE: Pipe handles should extend a minimum

of 48" beyond jacket front panel for best
leverage.

Step 4. Using the pipe handles, lift boiler until

adjustable legs are elevated above the deck
boards.

Step 5. Remove skid from underneath the boiler.
Step 6. Lower pipe handles until front adjustable

legs touch fl oor. If necessary, place wooden

blocks under front legs before lowering to
provide hand clearance.

Step 7. To lower rear of boiler, tilt unit slightly

forward by pushing on smokebox collar or lift
pipes protruding through rear legs until wooden
blocks can be removed (see Figure 3). Slowly
allow the weight of the boiler to tilt backward
until rear legs rest on fl oor.

Step 8. If wood block was placed under front legs,

lift pipe handles, remove wooden block and
lower front legs to fl oor. Remove pipe handles.

NOITUAC

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C. MOVE BOILER TO PERMANENT POSITION

by sliding or walking.

D. PROCEDURE TO OPEN, CLOSE AND

SECURE BURNER SWING DOOR

Throughout this manual you will be instructed to open

and close the burner swing door for various reasons.
There is a proper and improper method to closing and
securing the burner swing door opened for inspection,
cleaning or fi eld service.

1. TO OPEN BURNER SWING DOOR
(see Figures 4A and 4B).

Step 1. Loosen but do not remove left side latching

hardware (3/8" x 1-3/4" lg. tap bolt).

Figure 3: Packaged Boiler Removal from Skid

10

Figure 4A: Partial Front View - Burner Swing Door Mounted to Boiler - Fully Closed and Secured

Step 2. Loosen and remove right side latching

hardware (5/16" x 1-3/4" lg. tap bolt and
washer).

Step 3. Remove left side latching hardware (5/16" x

1-3/4" lg. tap bolt and washer).

Step 4. Disconnect burner power cord from

receptacle located in lower right corner of jacket
front panel.

Step 5. Door can be swung to the fully open

position, approximately 90° to 120°, with the
burner mounted providing that there is 19" of
clearance to the adjacent wall, see Figure 1.

NOTE: If reduced clearance prevents the door

from opening fully, one of the following can
provide full access:

a. Burner can be removed to allow full rotation

of door.

b. Door with burner mounted can be lifted

off mounting bracket and set aside during
servicing.

c. The door mounting hardware is reversible

from left side hinge (as shipped) to right side
hinge.

To reverse hinge arrangement (see Figure

4A):

• Lift door off mounting bracket and set
aside.

• Remove mounting bracket and hardware
from left side.

• Remove upper jacket front panel retaining
screw (5/16" x 1/2" lg. Phillip Pan head
machine screw) from right side of door
and re-install in vacated upper mounting
bracket tapping. Do not tighten.

• Move lower jacket panel retaining screw
from right side to left tapping. Do not
tighten.

• Rotate door mounting bracket 180°.
Insert 5/16" cap screw through top hole in
bracket and install in upper vacated jacket
hole on right side of door.

• Install second 5/16" cap through bracket
hole into lower vacated tapping on right
side.

• Tighten both sets of hardware to secure
jacket and mounting bracket.

• Lift door and place integral cast hinge
pins on door into slotted mounting bracket
holes.

2. Perform routine inspection, service or cleaning as
necessary.

3. To close Burner Swing Door (see Figures 4A and
4B):

Step 1. From the fully open position, rotate Burner

Swing Door to the closed position.

Step 2. If necessary, place your right hand under

the burner air tube to lift upward. Lift the
door up unto the built-in cast ramp/door rest

11

Figure 4B: Top View - Burner Swing Door Mounted to Cast Iron Block Assembly (Jacket Removed for Clarity)

12

(protruding from the bottom of the front section
casting - see Figure 4A).

Step 3. Use one hand to help hold door in position

by lifting up on rear burner housing or applying
pressure directly to the door while re-installing
the securing hardware with your opposite hand.

Always install right side latching hardware
(5/16" x 1-3/4" lg. tap bolt and fl at washer)
fi rst, then install left side hinge hardware (5/16"
x 1-3/4" lg. tap bolt and fl at washer) second.

Apply additional pressure while hand tightening
the hardware as far as possible, then release the
pressure.

E. INSPECT SWING DOOR INSULATION AND

ROPE GASKET.

1. Open burner swing door using procedure previously
outlined in Paragraph D of this section.

2. Inspect fi berglass rope located on the swing door.
The rope must be evenly distributed around the
perimeter of the door groove and cannot bunch or
overhang. There must not be a gap where the two
ends of the rope meet. Repair or replace if the rope
is damaged or if there is a gap between the ends.

3. Inspect burner swing door insulation for damage and
proper type.

ECITON

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.sedishtobnoyllauqeni-nwardsirooderus

Step 4. Use a hand wrench to tighten door hardware

and always start with the right side cap
screw fi rst. Use an alternating tightening
method from right side tap bolt to left side tap
bolt to tighten door equally until sealed without
applying excessive torque. Never tighten left
side fl ange bolt fi rst or tighten either piece of
hardware 100% without using the alternating
tightening method described above.

Failure to follow the prescribed procedure could

cause thread damage to casting or a leak in the
door seal. If left side tap bolt is tightened before
right side tap bolt, right side of door can not be
drawn-in to provide an air tight seal, as shown in
Figure 4C. Applying excessive torque will only
cause thread damage.

a. By design, cast bars on front section between

the combustion chamber and between the left
and right side 2nd and 3rd pass fl ueway should
make an impression in door insulation to seal the
chambers.

b. By design, door insulation on model MPO231

will have two (2) by-pass pockets cast into
the insulation centered on the bar between the
combustion chamber and 3rd pass fl ueways.

On models MPO84 thru MPO189 these pockets

should not be present. If insulation is damaged
or not of proper type regarding pockets, it must
be replaced.

4. Do not close and secure door at this time, proceed to
Field Assembly Details, Paragraph F.

F. FIELD ASSEMBLY OF BOILER TRIM AND

CONTROLS

Open miscellaneous parts carton and remove contents.

Identify the components using the illustrations (Figures

Figure 4C: Top View - Burner Swing Door Fully Closed but Not Properly Secured or Sealed

13

5 thru 12) throughout the assembly sequence outlined
below as it applies to your installation.

1. Install supply manifold and aquastat control, refer to
Figure 5.

Step a. Remove two (2) #8 x 1/2" lg. sheet metal

screws securing jacket top rear panel to jacket
rear panel. Slightly lift and pull jacket top rear
panel away from jacket top panel to gain access
to internal J-box wiring harness.

Step b. Locate the cast iron supply manifold shown

in Figure 5. Apply thread sealant to 1-1/2" NPT
male threads. Thread male end into 1-1/2" NPT
top tapping on rear section. Using hex head on
top, tighten manifold until 1/2" NPT boss for
control well is facing forward and joint is water
tight.

Step c. Locate 1/2" NPT x 1-1/2" immersion well.

Apply thread sealant to 1/2" NPT male threads.
Thread well into 1/2" NPT boss on front of
supply manifold. Using hex head, tighten well
until water tight.

Step d. Locate L7248C Aquastat Control/Harness

Assembly. Loosen mounting screw on bottom of
case. Insert sensor into immersion well. Mount
control on immersion well and tighten screw to
secure control in horizontal position with harness
on right side as shown in Figure 5.

Step e. Insert two (2) brown thermostat wires and

three (3) aquastat wires with Molex socket
connector located on opposite end of aquastat
harness through 7/8" dia. blank knockout in
jacket top panel. Fish these wires to rear of
internal junction box. Insert snap-in conduit
connector in 7/8" blank knockout, squeeze tabs
on side of connector, push into knockout and
release tabs to lock connector in place.

Step f. Inside internal junction box, locate wires

with mating aquastat plug connector labeled
"Aquastat" (refer to Figure 6 for details of
harness located inside internal junction box).
Align mating halves of socket connector from
aquastat control with harness plug connector.
Push connectors together until snap on connector
is locked in place.

2. If required on this water boiler application, install
low water cut-off (LWCO) Kit, optional equipment

- Burnham P/N 100106-01, refer to Figure 7. Also
refer to instructions provided with LWCO Kit.

If not required, proceed to Paragraph 3.

Step a. Apply sealant to probe threads and install

in 3/4" NPT tapping on right side of manifold as
shown. Tighten so that the mounting screws are
horizontally aligned and joint is water tight.

Step b. Remove wing nut from the probe terminal.

Loosen screw and open cover on control box.

Figure 5: Supply Manifold and Aquastat Control Assembly Details

14

Figure 6: Internal Junction Box and Wiring Harness Details

Mount the control box on the probe by aligning
the keyhole slots with the probe mounting
screws. Replace the wing nut. Secure the
control box by tightening wing nut and two (2)
mounting screws.

Step c. Remove snap-in plug from 7/8" dia. center

knockout, adjacent to aquastat control harness.

Step d. Insert three (3) wires with Molex connector

located on opposite end of LWCO harness
through 7/8" dia. knockout. Fish wires with
Molex connector to rear of internal junction box.
Insert snap-in conduit connector into 7/8" dia.
knockout, squeeze tabs on side of connector,
push into knockout and release tabs to lock
connector in place.

Step e. Inside internal junction box, locate wires

with mating LWCO socket connector labeled
"LWCO" (refer to Figure 6 for details of harness
located inside internal junction box). Remove
the factory installed socket plug jumper from
LWCO harness socket connector and discard.
Align mating halves of plug connector from
LWCO control with harness socket connector.
Push connectors together until snap on side of
connector is locked in place.

3. If required on this water boiler application,
install Auxiliary Dual Limit Control Kit, optional
equipment - Burnham P/N 100107-01, refer to
Figure 8. Also refer to instructions provided with
Auxiliary Dual Limit Control Kit.

If not required, proceed to Paragraph 4.

Step a. Locate 1/2" NPT x 1-1/2 immersion well.

Apply thread sealant to 1/2" NPT male threads.
Thread well into 1/2" NPT boss on left side of
supply manifold. Using hex head, tighten well
until water tight.

Step b. Locate L4080B Auxiliary Limit Control/

Harness Assembly. Loosen mounting screw on
side of case. Insert sensing bulb into immersion
well. Mount control on immersion well and
tighten screw to secure control in vertical
position with harness extending toward rear as
shown in Figure 8.

Step c. Remove snap-in plug from 7/8" dia.

knockout closest to supply manifold. Remove
locking ring from 90° conduit connector on end
of control harness.

Step d. Insert two (2) wires with Molex connector

located on end of auxiliary limit control harness
through 7/8" dia. knockout. Fish wires with
Molex connector to rear of internal junction
box. Insert 90° conduit connector into 7/8" dia.
knockout, secure to top panel with locking ring.

Step e. Inside internal junction box, locate wires

with mating auxiliary limit socket connector
labeled "Aux. Limit" (refer to Figure 6 for
details of harness located inside internal junction
box). Remove the factory installed socket plug
jumper from harness socket connector and
discard. Align mating halves of plug connector

15

Figure 7: Optional Equipment - Low Water Cut-Off (LWCO) Control Assembly Details

Figure 8: Optional Equipment - Auxiliary Limit Control Assembly Details

from auxiliary limit control with harness socket
connector. Push connectors together until snap,
on side of connector, is locked in place.

4. Install return manifold and relief valve, refer to
Figure 9.

Step a. Locate the cast iron return manifold with

injector nipple (installed). Apply thread sealant
to 2" NPT male threads. Insert injector nipple

16

into 2" NPT upper rear tapping on rear section,
engage 2" NPT male threads on end of manifold
and hand tighten.

Note: Based on system return piping and access

to service boiler, see Figure 1 and Figures 13A
and 13B, predetermine if manifold orientation
is to be positioned for vertical, horizontal left or
horizontal right side return piping as shown in
Figure 9.

Place a wrench on the hex nut portion and

tighten manifold until the return pipe orientation
is correct for your installation and the joint is
water tight.

Step b. Install relief valve using 3/4" NPT tapping

on side of return manifold. Relief valve must
be installed in vertical position. If orientation of
return manifold is for:

• 1-1/2" NPT vertical return piping - Install
3/4" NPT x 90° street ell (not furnished)
into either the left or right side tapping on
return manifold. Install relief valve
vertically into street ell. Install 3/4" pipe
plug (not furnished) in tapping on
opposite side (see Figure 9).

• 1-1/2" NPT horizontal left or right side
return piping - Install relief valve vertically
in 3/4" NPT tapping located on top of
return manifold. Install 3/4" pipe plug (not
furnished) in bottom tapping as shown (see
Figure 9).

Step c. Pipe discharge of relief valve as shown in

Figures 13A and 13B. Installation of the relief
valve must be consistent with ANSI/ASME
Boiler and Pressure Vessel Code, Section IV.

GNINRAW

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5. Install drain valve and indirect water heater return
piping, see Figure 10.

Step a. Apply pipe sealant to both ends of 1-1/4"

NPT x 5" lg. nipple. Thread nipple into 1-1/4"
NPT lower rear tapping on rear section.

Step b. Thread 1-1/4" x 1-1/4" x 3/4" NPT tee on

opposite end of 5" lg. nipple installed in Step a.

NOTE: Based on access for servicing and

location of sewer or fl oor drain, when tightening

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Figure 9: Return Manifold and Relief Valve Assembly Details

17

these fi ttings, determine if drain valve is to be
located on the left or right side.

Tighten nipple and tee into 1-1/4" NPT lower

rear tapping on rear section until joints are water
tight for desired position.

Step c. Apply sealant to 3/4" NPT thread on drain

valve. Thread into 3/4" NPT tapping on side
outlet of tee. Use hex nut portion to tighten
valve until water tight.

Step d. If Alliance ™ Indirect Water Heater is

connected to system, do not install 1-1/4" NPT
pipe plug. Connect piping as shown in Figures
13A, 13B, 15A and 15B, as applicable. Also
refer to Alliance ™ manual for additional
information.

6. Connecting fi eld wiring, refer to Figures 5, 6 and 19.

Step a. 120 volt power supply fi eld wiring will

enter internal junction box through 7/8" dia.
knockout in jacket rear panel, see Figure 5.

Step b. Locate the black and white harness wires

labeled "120V Power Supply" inside internal
junction box, see Figure 6. Using wire nuts,
connect the 120 volt power supply fi eld wires to
the harness wires. Connect the fi eld ground wire
to the green grounding screw located in bottom
of internal junction, refer to Figures 6 and 20.

Step c. 24V thermostat fi eld wiring will enter

internal junction box through 5/16" snap bushing

located on rear panel adjacent to 7/8" dia.
knockout for power supply.

Step d. Locate the two (2) brown wires labeled

"24V Thermostat" inside the internal junction
box, see Figure 6 (these wires originate from
"T-T" terminals in aquastat control and feed
into J-box through harness). Using wire nuts,
connect 24 volt fi eld thermostat wires to brown
wires in J-box.

Step e. Locate jacket top rear panel that was

removed earlier to gain access to internal
junction box. Position panel between side
panels, hold on a slight angle, engage tabs on
front fl ange of top rear panel with rectangle
slots on rear fl ange of top panel, refer to Figures
5 and 9.

NOTE: It may be necessary to lift up slightly

on top panel near slotted opening at supply
manifold to align tabs with rectangular slots on
fl anges.

Lower rear fl ange of jacket top rear panel down

over rear panel. Align holes and secure with
two (2) #8 x 1/2" lg. sheet metal screws.

7. Installing stainless steel fl ueway baffl es. Baffl e
requirements differ from model to model, see
Table 2.

NOTE: Read caution statement before proceeding.

Figure 10: Piping Arrangement for Drain Valve and Indirect Water Heating Return

18

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TABLE 2: BAFFLE USAGE

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8. Close the burner swing door and securely seal the

door to the boiler front section by reinstalling the
hardware and securing the door using procedure
previously outlined in Paragraph D of this section.

ECITON

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9. Install oil burner, refer to Figure 12.

Step a. Open burner carton and remove contents.
Step b. Check oil nozzle in burner for size, angle

and type, inspect electrode settings, check head
setting, check air band and air shutter settings,
refer to Table 6 at rear of this manual.

Step c. Place oil burner gasket on burner and align

holes.

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Step a. Install stainless steel baffl es provided in

miscellaneous parts carton as follows, refer to
Table 2 and Figure 11:

• Model MPO84 - To install fl ueway baffl e
in 3rd pass on left side of boiler, hold baffl e
with word "Left" readable at the top. Slide
baffl e in fl ueway until position tab touches
fi ns on left side of 3rd pass fl ueway. To
install fl ueway baffl e in 3rd pass fl ueway on
right side of boiler, hold baffl e with word
"Right" readable at the top. Slide baffl e in
fl ueway until position tab touches fi ns on
right side of 3rd pass fl ueway.

• Models MPO147, MPO189 and MPO231

- T o install fl ueway baffl e in 2nd pass fl ueway
on left side of boiler, hold baffl e with word
"Left" readable at the top. Slide baffl e in
fl ueway until position tab touches fi ns on
right side of 2nd pass fl ueway. To install
fl ueway baffl e in 2nd pass fl ueway on right
side of boier, hold baffl e with word "Right"
readable at the top. Slide baffl e in fl ueway
until position tab touches fi ns on left side of
2nd pass fl ueway.

NOTE: 2nd and 3rd pass fl ueway baffl e are not

interchangable.

Figure 11: Baffl e Orientation in Flueways

19

Step d. Remove three (3) 5/16-18 x 3/4 lg. cap

screw from burner swing door used for mounting
burner.

Step e. Thread (1) 5/16-18 x 3/4 lg. cap screw,

approximately three (3) full turns, into tapping
located at 12:00 o'clock on burner swing door.

Step f. Insert oil burner into the opening of burner

swing door. Align and engage keyhole slot in
burner fl ange over head of protruding cap screw

installed in previous Step. Rotate burner to the
right to lock fl ange behind head of cap screw.

Step g. Align holes and install two (2) remaining

cap screws. Level burner and fully tighten all
three (3) screws.

Step h. Plug burner power cord into power outlet

receptacle located in lower right corner of front
panel.

20

Figure 12: Oil Burner Installation

SECTION III: WATER BOILER PIPING

ECITON

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A. EVALUATE THE EXISTING WATER

SYSTEM.

Design a piping system and install boiler which will

prevent oxygen contamination of boiler water and
frequent water additions.

1. There are many possible causes of oxygen
contamination such as:

a. Addition of excessive make-up water as a result

of system leaks.
b. Absorption through open tanks and fi ttings.
c. Oxygen permeable materials in the distribution

system.

2. In order to insure long product life, oxygen sources
must be eliminated. This can be accomplished by
taking the following measures:

a. Repairing system leaks to eliminate the need for

addition of make-up water.
b. Eliminating open tanks from the system.
c. Eliminating and/or repairing fi ttings which allow

oxygen absorption.
d. Use of non-permeable materials in the

distribution system.
e. Isolating the boiler from the system water by

installing a heat exchanger.

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B. CONNECT SYSTEM SUPPLY AND RETURN

PIPING TO BOILER. See Figures 13A and 13B.

Also, consult I=B=R Installation and Piping Guides.

1. If this boiler is used in connection with refrigeration
systems, the boiler must be installed so that the
chilled medium is piped in parallel with the heating
boiler using appropriate valves to prevent the chilled
medium from entering the boiler. See Figure 14.
Also, consult I=B=R Installation and Piping Guides.

2. If this boiler is connected to heating coils located
in air handling units where they may be exposed
to refrigerated air, the boiler piping must be
equipped with fl ow control valves to prevent gravity
circulation of boiler water during the operation of
the cooling system.

3. If boiler is used with an Alliance™ Indirect-Fired
Domestic Water Heater, install the Alliance™ as
a separate heating zone. Refer to the Alliance™
Installation, Operating, and Service Instructions for
additional information.

4. Use a boiler bypass if the boiler is to be operated
in a system which has a large volume or excessive
radiation where low boiler water temperatures may
be encountered (i.e. converted gravity circulation
system, etc.) The bypass should be the same size as
the supply and return lines with valves located in
the bypass and return line as illustrated in Figures
13A and 13B in order to regulate water fl ow for
maintenance of higher boiler water temperature.

GNINRAW

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If a low water cut-off is required, it must be

mounted in the 3/4" supply manifold tapping (see
Figures 7, 13A and 13B) or in the system piping
above the boiler. The minimum safe water level of
a hot water boiler is just above the highest water
containing cavity of the boiler; that is, a hot water
boiler must be full of water to operate safely.

.slairetamelbitsubmocotgnipipretawtoh

5. If it is required to perform a long term pressure
test of the hydronic system, the boiler should fi rst

be isolated to avoid a pressure loss due to the escape
of air trapped must fi rst be removed from the boiler.

21

22

Figure 13A: Water Boiler Piping for Circulator Zoned Heating System - Supply Side Circulator

Figure 13B: Preferred Water Boiler Piping for Zone Valve Zoned Heating System - Supply Side Circulator

23

To perform a long term pressure test including the

boiler, ALL trapped air must fi rst be removed from
the boiler.

A loss of pressure during such a test, with no visible

water leakage, is an indication that the boiler
contained trapped air.

Figure 14: Recommended Piping for Combination Heating and Cooling (Refrigeration) System

24

SECTION IV: INDIRECT WATER HEATER PIPING

A. CONNECT ALLIANCE™ INDIRECT WATER

HEATER PIPING as shown in Figures 15A and

15B.

Also refer to Figures 13A and 13B.

1. Refer to Alliance™ manual for additional
information.

Figure 15A: Alliance™ Water Heater Piping w/Supply Side Circulator

on Circulator Zoned Heating System

Figure 15B: Alliance™ Water Heater Piping w/Supply Side Circulator on Zone Valve Zoned Heating System

25

SECTION V: VENTING

A. CHIMNEY VENTING

1. Chimney venting is an important part of a safe
and effi cient oil fi red appliance system. Contact
your local fi re and building offi cials on specifi c
requirements for restrictions and the installation
of fuel oil burning equipment. In addition,
consult with a professional knowledgeable on
the requirements of NFPA 31 – Standard for the
Installation of Oil-Burning Equipment and NFPA
211 - Standard for Chimneys, Fireplaces, Vents, and
Solid Fuel-Burning Appliances for installations in
the United States. Installations in Canada must be
reviewed with a professional knowledgeable on the
requirements of CSA B139-04 – Installation Code
for Oil-burning Equipment.

2. The safe venting of oil fi red boilers is dependant on
many factors. Some of these factors include:

a. suffi cient draft during the entire heating season

to allow for the safe discharge of combustion by­products and;

b. suitable corrosion protection in the event of

condensing fl ue gases. Only a trained and
qualifi ed contractor may install this product.

3. The MPO can be vented into a fi reclay tile-lined
masonry chimney that meets requirements outlined
in Paragraph 4 below. It can also be vented into
a chimney constructed from type L vent or a
factory built chimney that complies with the type
HT requirements of UL 103. The chimney and
vent pipe shall have a suffi cient draft at all times,
to assure safe proper operation of the boiler. See
Figure 16 for recommended installation.

GNINRAW

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ottfardhguoneetaerctonyamtupni

.noitsubmoc

4. Chimney Inspection – Prior to the installation of
any new or replacement fuel burning equipment the
chimney shall be inspected by a qualifi ed installer.
The chimney shall be inspected for integrity as
well as for proper draft and condensate control.
Some jurisdictions require the use of a liner when
changing fuel types. Some jurisdictions require
the use of a liner even when the same fuel is used.
At a minimum, the chimney shall be examined
by a qualifi ed person in accordance with the
requirements of Chapter 11 of NFPA 211, Standard
for Chimneys, Fireplaces, Vents, and Solid Fuel­Burning Appliances.

26

a. Loose Mortar – Loose mortar could be an

indication of a prior history of condensing fl ue
gases upon the inside walls of the chimney.
Colder climates are more susceptible to this
condition. Under no circumstances shall a
chimney of this condition be used until it meets
the requirements of NFPA 211 or CSA B139-

04.

b. Unlined Chimney – Under no circumstances

shall a chimney constructed of brick only
be used. Only approved clay liners or listed
chimney lining systems shall be used as specifi ed
in NFPA 31 or CSA B139-04.

c. Abandoned Openings – Openings through the

chimney wall that are no longer used shall
be sealed in accordance to NFPA 211. Often
abandoned openings are improperly sealed and
usually covered by a gypsum wall covering.

d. Clean Chimney – Chimney shall be free of all

loose debris.

5. Draft Regulator – the draft regulator supplied with
the boiler must be used with this appliance. No
other draft regulator shall be used. Refer to Figures
16 and 17.

B. CHIMNEY CONNECTOR

1. A chimney connector (vent pipe) is used to connect
the boiler to the base of the chimney. The chimney
connector should be kept as short as possible. The
horizontal length of the chimney connector shall not
be greater than 10 feet.

NOTE: Secure chimney connector to cast iron

smokebox collar with three (3) #10 x ½" self drilling
hex head TEK screws provided in miscellaneous
parts carton. Locate screws around perimeter of

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connector as shown in Figure 16 and approximately
½" in from edge. Use drill with 5/16" hex bit to
drive screws through connector and smokebox
collar.

REGNAD

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Figure 16: Recommended Vent Pipe Arrangement and Chimney Requirements

Figure 17: Proper and Improper Locations of Draft Regulator

27

2. Type B Chimney Connector - a type B chimney
connector can be used to transmit the fl ue gases
provided fl ue gas temperature entering the chimney
connector is greater than 310°F.

3. Type L Chimney Connector - a type L vent or
other suitable material shall be used for a chimney
connector if the temperature or exiting temperature
is less than 310°F.

2. NFPA 31 and CSA B139-04 have information to
help the installer make an appropriate choice of
venting materials. In some cases a chimney may
have to be lined to create suffi cient draft. In other
cases, the chimney may have to be lined to prevent
the corrosion of a masonry chimney. Consult
with a chimney specialist knowledgeable on the
requirements for chimney requirements in your area.

REGNAD

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.yletaidemmi

C. DRAFT

1. The natural draft generated through a chimney is
dependent on several factors including, chimney
height, temperature of fl ue gases, cross section area
of chimney, chimney wall insulation value, dilution
air and total volume of fl ue gases, to name a few.
Make sure that the boiler has been running for at
least 5 minutes before measuring the draft.

2. Minimum Draft at Breech (Canopy) – The draft
induced by a chimney must create at least a
pressure of 0 (zero) inches water column (“ w.c.)
at the pressure tapping on the canopy mounted
on rear of boiler (see Figure 18). The pressure
at the canopy cannot be positive since this could
create a condition that allows fl ue gas by-products
to escape from the draft regulator. A negative
pressure reading up to -.03 inches water column
is acceptable for proper operation. (See Table 6,
Burner Specifi cations at the rear of this manual for
more details)

3. Minimum Overfi re Pressure – The overfi re
pressure is another piece of information that is
often measured, however this should be done for
observation purposes only! The breech pressure
must be used to qualify the draft condition. See
Table 6 for more details as a guide. Actual draft and
temperature measurements may be different then
those values in the table.

D. STACK TEMPERATURE

1. The temperature of the fl ue gases has a signifi cant
effect on the amount of draft created in a vertical
chimney as well as the propensity to create
condensate. The higher the stack temperature, the
greater the amount of draft that can be generated. A
lower stack temperature not only reduces the amount
of draft that can be created but it also increases the
possibility that the fl ue gases could condense in the
chimney connector or stack.

28

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gninilerehtnitluserdluohsnoitacilppaenil

tahtrenilelbatiusahtiwyenmihcehtfo

tsniagatcetorpotdnatfardtneiciffussetaerc

.etasnednocsageulfybdesuacnoisorroc

3. Baffl es – The effi ciency of the boiler is based on the
insertion of fl ue baffl es supplied with your product.
Under no circumstances are other baffl es to be
used on this product. The baffl es are installed in
the 2nd pass (two inner fl ueways) on the MPO147,
MPO189 and MPO231. The baffl es on the MPO84
are installed in the 3rd pass only. Refer to Section
II, Item F, Paragraph 7 for baffl e installation. If
there is any doubt on the application of this boiler
on the intended chimney, consult with your local
code offi cials. At a minimum, remove the baffl es
to increase the stack temperature. See Table 6 for
temperature differential (∆T) with baffl es IN and
OUT. In addition, the lower the CO2 level the
higher the stack temperature.

Figure 18: Smokebox Pressure Tapping for

Checking Draft at Breech

1. General

GNINRAW

fosngisynaeraerehtfiselffabehtevomeR

yenmihcroyenmihcehtninoitasnednoc

nnoc

.snoitadnemmocerroflanoisseforp

yenmihclacoluoyhtiwtlusnoC.rotce

a. Use 4" dia., single wall galvanized metal pipe

and fi ttings available at most heating distributors
for air intake piping. Maximum allowable air
intake length is 50 equivalent feet. Each elbow
is equal to 6 equivalent feet.

E. MINIMUM CLEARANCES

See Figure 2 for details regarding clearances to

combustibles for the boiler.

F. OPTIONAL AIR INTAKE PIPING

INSTALLATION - All air for combustion can be

supplied directly to the burner from outdoors providing
that the criteria for chimney, vent connector and
minimum stack temperature outlined in this section
can be maintained. (ONLY AVAILABLE WITH
BECKETT BURNER). See Figure 19.

GNINRAW

foelddimehtniriaroodtuognisU

kcatsrewolnitluseryamretniw

sliated

.launamsihtfonoitceS

.noitcessihtnideniltuo

wollofdnadnatsrednu,daeR

tallatsnI-erPehtnideniatnoc

noi

GNINRAW

riaelbawollamumixamdeecxetonoD

.htgnelekatni

b. Start at burner. Work toward air intake terminal.
c. Maintain minimum of 1/4 inch per foot slope in

horizontal run to air intake terminal. Slope down
toward air intake terminal.

d. Seal all joints gas-tight, using silicone caulk or

self-adhesive aluminum tape.

2. After determining location, cut a hole in the wall to
accept 4 inch air intake pipe. See Figure 19.

3. Remove the metal knockout in right side of burner
cover. Install Burnham Inlet Air Accessory Kit, Part

.noitadargedyenmihcdnaserutarepmet

roegapeesetasnednocfosngisynA

yenmihcfoesabehttanoitarolocsid

ehtrepyletaidemmideidemerebtsum

.epipekatniriafoezisecudertonoD

snoitcirtsernoitcurtsnirianoitsubmoc

Number 611280031.

4. Mount the Vacuum Relief Valve Tee Assembly (P/N
8116268 included with Kit) or 90° elbow into the
burner inlet ring. See Figure 18.

a. Secure with at least three (3) sheet metal screws

evenly spaced around the burner inlet ring.

b. Assemble the vacuum relief valve balance

weight onto the gate. Refer to the vacuum relief
valve manufacturer's instructions.

Figure 19: Optional Air Intake Piping Installation - Only Available with Beckett Burner

29

c. Mount the vacuum relief valve into the tee and

fasten with a screw and nut in collar tabs. To
ensure proper operation, the gate must be level
across the pivot point and plumb. Refer to
vacuum relief valve manufacturer's instructions.

5. Install remainder of air intake, securing each joint
with at least three (3) sheet metal screws evenly
spaced.

6. Install air intake terminal. See Figure 19.

ECITON

sehcni21tsaeltaebtsumlanimretekatnI

.noitalumuccawonssulpedargevoba

7. Seal all external joints with weatherproof caulk.

GNINRAW

muelorteperehwekatniriaetacoltonoD

elitalov,stnegreted,s'CFC,setallitsid

.tneserperaslacimehcrehtoynarosropav

lliweruliafdnanoisorrocreliobereveS

.tluser

30

SECTION VI: ELECTRICAL

REGNAD

ecivresronoitallatsnignitpmettaerofebderewopnuerasnoitcennoclacirtcelellaerussaylevitisoP
sexoblacirtcelellatuokcoL.gnidliubroreliobehtfosnoitcennocrostnenopmoclacirtcelefo

w

.ffodenrutsirewopecnokcoldaphti

GNINRAW

lacisyhpsuoiresnitluseryamreliobehtotsnoitcennoclacirtceleeriwylreporpoteruliaF

.mrah

.krowlacirtceleynagnitpmetta

A. GENERAL

1. Install wiring and electrically ground boiler in
accordance with requirements of the authority
having jurisdiction, or in absence of such
requirements the National Electrical Code, ANSI/
NFPA 70, and/or the CSA C22.1 Electric Code.

2. Refer to National Electric Code or Local Electric
Codes for proper size and type of wire required.
Follow Code.

3. A separate electrical circuit must be run from
the main electrical service with an over-current
device/disconnect in the circuit. A service switch is
recommended and may be required by some local
jurisdictions.

4. Use anti-short bushings on all wiring passing
through boiler jacket, junction boxes and/or control
boxes.

5. Use armored cable (BX) over all exposed line
voltage wiring.

laerusekaM.ecruosenonahterommorfebyamrewoplacirtcelE

ylreporpahtiwdetcetorpebtsumreliobhcaE

6. If an Alliance™ indirect water heater is used, use
priority zoning. Do not use priority zoning for
Hydro-Air Systems.

7. Wiring should conform to Figure 20.

B. INSTALL A ROOM THERMOSTAT on an

inside wall about four feet above fl oor. Never install
thermostat on an outside wall or where it will be
infl uenced by drafts, hot or cold water pipes, lighting
fi xtures, television, rays of the sun or near a fi replace.
Keep large furniture away from thermostat so there will
be free movement of room air around this control.

Heat Anticipator in Thermostat should be set to match

the requirements of the control to which it is connected.
See Figure 20 for desired system and heat anticipator
setting. If system tends to overheat above the
thermostat's temperature setting, reduce heat anticipator
setting by .1 or .2 amps. If system tends to short cycle
without reaching desired room temperature, increase
heat anticipator setting by .1 or .2 amps.

.tcennocsiddesufdezis

.slortnocgnitareporoytefasynaevitareponiekamrotuopmujreveN

erofebffosirewopl

31

32

BOILER SEQUENCE OF OPERATION

Figure 20: Schematic Wiring Diagram, Standard Control Set w/Optional LWCO and/or High Limit Accessory Kit

A call for heat by the thermostat energizes the L7248C control which in turn energizes the primary control to turn on the burner. The burner will operate in the following sequence:

operate as long as the thermostat is calling for heat. If the thermostat is not satisfi ed and the operating (high) limit is reached, the circulator will continue to operate, and the burner will stop

until the operating (high) limit is closed by a 15°F drop in boiler water temperature.

On water boiler equipped with Optional L4080B Auxiliary High Limit Control, if boiler water temperature exceeds the operating limit setting and reaches the high limit setting, the circulator

will continue to operate, and the burner will stop until the high limit is closed by an 8°F drop in boiler water temperature.

Prepurge for the fi rst 10 seconds; fi re until the thermostat is satisfi ed or the limit setting on the operating (high) limit is reached; post-purge for the last 10 seconds. The circulator will

On burner start, if the cad cell does not see fl ame within approximately 15 seconds, primary control will shut burner down and enter into a recycle mode, after 60 seconds burner will restart

and repeat trial for ignition. If after three (3) trials for ignition, fl ame is not detected, control will enter into restricted mode and must be reset manually before burner can be restarted.

On water boiler equipped with optional low water cut-off (LWCO) control, if probe senses a low water condition, power to the L7248C control is de-energized. When water level is

replenished, LWCO will automatically re-energize sending power to the L7248C control.

SECTION VII: OIL PIPING

A. GENERAL

1. Use fl exible oil line(s) so the burner swing door
can be opened without disconnecting the oil supply
piping.

2. A supply line fuel oil fi lter is recommended as a
minimum for all fi ring rates but a pleated paper fuel
oil fi lter is recommended for the fi ring rates below

1.0 gph to prevent nozzle fouling.

3. Use Flared fi ttings only. Cast iron fi ttings cannot be
used.

ECITON

.sgnittifnoisserpmocesutonoD

.yletelpmoctinuleufdnaenil

lacolruoyotrefeRsnoitcidsiruj-drager

iddanI.stnemeriuqerylppus

.adanaCninoitallatsnI

4. Use of a high effi ciency micron fi lter (Garber or
equivalent) in addition to a conventional fi lter is
highly recommended.

5. Piping used to connect the oil burner to the oil
supply tank shall not be smaller than 3/8" iron pipe
or 3/8" OD copper tubing. Copper tubing shall have
a .032" minimum wall thickness.

GNINRAW

htiwreppocnacsecnatsmucriconrednU

.desuebsrotcennocelytstaews

ECITON

afoesuehteriuqersnoitcidsirujemoS

ehtro/dnaknatehttaevlavffotuhselbisuf

snoitcidsirujemos,noitiddanI.renrub

lacirtceleelbisufafoesuehteriuqer

kcehC.tiucricrenrubehthtiwkcolretni

.stnemeriuqerlaicepsrofsedoClacolruoy

B. SINGLE PIPE OIL LINES

rothgitriayletulosbaebtsumgnipipliO

deelB.tluseryamemirpfossolroskael

leufrofsnoitaredisnoclaicepsynagni

otrefer,noit

fonoitallatsnIehtrofdradnatS,13APFN

nisnoitallatsnIroftnempiuqEgninruB-liO

rof40-931BASCdnasetatSdetinUeht

1. Standard burners are provided with single-stage
3450 rpm fuel units with the bypass plug removed
for single-pipe installations.

2. The single-stage fuel unit may be installed single­pipe with gravity feed or lift. Maximum allowable
lift is 8 feet. See Figure 21.

3. Fuel Oil Line Deaerator – On many occasions a
leaky oil delivery line can introduce air into the
fuel oil supply system. This often creates a rough
starting condition and can create a burner lockout
state. In addition to fi xing the leak, a fuel line
deaerator can be installed to eliminate air. The
single line from the fuel tank is connected to the
deaerator. The burner pump must be connected
to the deaerator as a two pipe system. Follow the
oil pump manufacturer’s recommendations for
conversion to a two pipe system.

Figure 21: Single Pipe Oil Line

33

C. TWO PIPE OIL LINES

1. For two piped systems, where more lift is required,
the two-stage fuel unit is recommended. Table
3 (two-stage) and Table 4 (single-stage) show
allowable lift and lengths of 3/8 inch and 1/2 inch
OD tubing for both suction and return lines. Refer
to Figure 22.

2. Follow the oil pump manufacturer’s recommenda­tions on the proper connections for a two pipe
system. Some manufacturers require the insertion
of a bypass plug.

3. Under no circumstances is a manual shutoff valve to
be located on the return line of a two pipe system.
Accidental closure of the return line will rupture the
oil pump seals.

TABLE 4: SINGLE-STAGE UNITS (3450 RPM) -
TWO PIPE SYSTEMS

gnibuTfohtgneLmumixaM

"H"tfiL

)52.giFeeS(

DO"8/3

)52erugiFeeS("R"+"H"

DO"2/1

)HPG3(gnibuT

)HPG3(gnibuT

TABLE 3: TWO-STAGE UNITS (3450 RPM) -
TWO PIPE SYSTEMS

"H"tfiL

)52.giFeeS(

DO"8/3

)HPG3(gnibuT

'0'39'001

'2'58'001

'4'77'001

'6'96'001

'8'06'001

'01'25'001

'21'44'001

'41'63'001

'61'72'001

'81---'67

'0'48'001

'1'87'001

gnibuTfohtgneLmumixaM

)52erugiFeeS("R"+"H"

DO"2/1

)HPG3(gnibuT

'2'37'001

'3'86'001

'4'36'001

'5'75'001

'6'25'001

'7'74'001

'8'24'001

'9'63'001

'01'13'001

'11'62'001

'21'12'38

'31---'26

'41---'14

34

Figure 22: Two Pipe Oil Lines

SECTION VIII: SYSTEM START-UP

GNINRAW

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ffonrut,roodgniwsgninepoerofeB.derongifiefilfossolroyrujnilanosrep,egamadytreporp

.rebmahcnoitsubmocehtedistuorenrubfogniriflatnediccatneverpotreliobothctiwsecivres

eht,noitiddanI.detelpmocsiecivresnehwyletelpmocrenetsafroodgniwsnethgitoteruseB

.tekcajtnorfehtnielcatpecerehtmorfdetcennocsidebotevahlliwdrocrewoprenrub

A. ALWAYS INSPECT INSTALLATION

BEFORE STARTING BURNER.

1. Verify that the venting, water piping, oil piping, and
electrical system are installed properly. Refer to
Installation Instructions contained in this manual.

2. Confi rm all electrical, water and oil supplies are
turned off at the source and that the vent is clear
from obstructions.

GNINRAW

llawollofdnadnatsrednu,daeryletelpmoC

erofeblaunamsihtnisnoitcurtsni

.putratsgnitpmetta

B. FILL HEATING SYSTEM WITH WATER.

ECITON

lioehtevomerylreporpottnatropmisitI

naelcoteruliaF.metsysehtmorftriddna

yseht

CLEAN HEATING SYSTEM if boiler water is

dirty.

Refer to Maintenance and Service Instructions Section

of this manual for proper cleaning instructions for water
boilers.

1. HOT WATER BOILERS. Fill entire heating
system with water and vent air from system. Use
the following procedure on a series loop or multi­zoned system installed as per Figures 13A and 13B,
to remove air from system when fi lling:
a. Close full port ball valve in boiler system piping.

b. Isolate all zones by closing zone valves or shut-

off valves in supply and return of each zone(s).

c. Attach a hose to vertical purge valve in boiler

system supply piping up stream from the full
port ball valve.

(Note - Terminate hose in fi ve gallon bucket at a

suitable fl oor drain or outdoor area).

d. Starting with one zone at a time, open zone valve

or shut-off valve in boiler supply and return
piping.

,stnevriadeggolcnitlusernacmets
.sevlavenozdeziesdnaegamadrotalucric

e. Open purge valve.
f. Open shut-off valve in cold water supply piping

located between the air scoop and expansion
tank.

g. Allow water to overfl ow from bucket until

discharge from hose is bubble free for 30
seconds.

h. When zone valve is completely purged of air,

close zone valve or shut-off valve. Open zone
valve to the next zone to be purged. Repeat
this step until all zones have been purged. At
completion, open all zone valves.

i. Close purge valve, continue fi lling the system

until the pressure gauge reads 12 psi. Close shut­off valve in cold water supply piping.

GNINRAW

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.evlav

ECITON

htiwdeppiuqesienilretawpu-ekamfI

lliwmetsys,evlavgnicudererusserp

tua

.snoitcurtsnis'rerutcafunam

j. Open full port ball valve in boiler system piping.
k. Remove hose from purge valve.
l. Confi rm that the boiler and system have no water

leaks.

m. It may be necessary to clean the air vent

assembly after a few days of operation.

C. CHECK CONTROLS, WIRING AND

BURNER to be sure that all connections are tight and

burner is rigid, that all electrical connections have been
completed and fuses installed, and that oil tank is fi lled
and oil lines have been tested.

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lebaLataDEMSAehtnodetsopsireliob

reveN.reliobehtfopotehtnodetacol

feil

evlavllifwolloF.isp21otllifyllacitamo

35

D. ADJUST CONTROL SETTINGS with burner

service switch turned “ON” and room thermostat set
10° below room temperature.

1. Adjustment and display modes of the L7248C Oil

Electronic Aquastat Controller.
a. On the L7248C, the overall range of the High

Limit is from 180°F to 240°F (82°C to 116°C).

b. Set the High Limit (designated HL) on the

L7248C Aquastat Control at 180°F. This
temperature setting may be varied to suit
requirements of installation. Differential is fi xed
at 15°F.

i. Adjusting Settings:
To discourage unauthorized changing of

Aquastat settings, a procedure to enter the
adjustment mode is required. To enter the
adjustment mode, press the UP, DOWN,
and I buttons (see Figure 23) simultaneously
for three (3) seconds. Press the ‘I’ button
until the feature requiring adjustment is
displayed:

· High Limit

· °F -- °C (Toggle)
Then press the UP and/or DOWN buttons

to move the set point to the desired value.
After 60 seconds without any button inputs,
the control will automatically return to the
READ mode.

any key pressed, the display will enter a
dim display mode. To return to the bright
display mode, simply press any key.

Text Description Display

Shows

bt Boiler Temperature

HL High Limit
err Error Code
f Degrees Fahrenheit
c Degrees Celsius

Figure 24: Display Readout Defi nitions

2. Control Operating Characteristics
The L7248C can be in any three (3) operational

states: Normal, High-Limit and Error. The
controller moves back and forth from High-Limit to
Normal state as part of normal operation.

The controller will enter the Error state when there

is an abnormal condition. The operating states are:
a. Normal: Boiler temperature has gone below the

high limit setting (minus the differential) and has
not exceeded the high limit setting.

b. High-Limit: Boiler temperature has gone above

the high limit setting and has not dropped below
the high limit setting (minus the differential).

c. Error: The controller has detected an error

condition (e.g., open sensor) and has shut down
the burner output. The controller continues to
monitor the system and automatically restarts if
the error condition clears. See Table 5.

Figure 23: L7248C Circuit Board Layout -

Horizontal Mount

ii. Display:

In the RUN mode, the Aquastat will fl ash

“bt” (boiler temp.) followed by the temp­erature (i.e., 220), followed by °F or °C.

To read boiler settings, press the ‘I’ key to

read the parameter of interest. For example,
press I (HL) High Limit is displayed,
followed by a three-digit number, i.e., 220,
followed by °F or °C. See Figure 24 for
Display Readout Defi nitions.

After approximately 60 seconds without

36

TABLE 5: LED ERROR CODES

rorrE

edoC

1rrE.rosneskcehc;tluafrosneS

2rrE.gniriw™MOCarivnEkcehc;tluafMOCE

3rrE.lortnocecalper;tluaferawdraH

d. The operating sequence for L7248C is described

below and shown in Table 6.

The switching action in the L7248C control

has one setting, the high limit, see Figure 25.
The switching relay is controlled by the low
voltage room thermostat. On a call for heat, the
relay contacts make to complete the line voltage
circulator circuit and also the burner circuit if the
boiler water temperature is below the high limit
setting. The high limit switch shuts off the burner
if boiler water temperature exceeds the high limit
setting. The circulator will continue to operate
as long as the thermostat is calling for heat. The

noitcA/esuaC

high limit automatically resets after the water
temperature drops past the setpoint and through
the differential.

Figure 25: L7248C Setpoint and Differential

Switching Action

TABLE 6: L7248C CONTROLLER OPERATING

SEQUENCE

noitcAesnopseRmetsyS

3. TURN ‘ON’ BURNER service switch and
allow burner to run until oil fl ows from vent
fi tting in a SOLID stream without air bubbles for
approximately 10 seconds.

NOTE: For Primary Control "Pump Priming

Cycle" details, see Paragraph I, No. 2., Step a., Item
ii .

4. Close vent fi tting and burner fl ame should start
immediately after prepurge is completed. Prepurge
prevents burner fl ame until 15 seconds has elapsed
after initial power is applied to burner. During
prepurge the motor and igniter will operate but the
oil valve will remain closed. Refer to Oil Primary
Control Instructions for more details.

5. Adjust oil pressure.
a. When checking a fuel unit's operating pressure, a

reliable pressure gauge may be installed in either
the bleeder port or the nozzle port. See Figure

26.

tatsomrehT

rofsllac

taeh

relioB

ehtsdeecxe

timilhgih

tatsomrehT

deifsitassi

rorrE

noitidnoc

.stratsrotalucriC

.gnittestimilhgihwoleb

rutarepmetretaweht

.ffonrutrenrubdnarotalucriC

.detcerrocsirorre

.snoitcennocehtninoisorroc

E. ADJUST OIL BURNER BEFORE

STARTING.

1. CHECK BURNER AIR BAND, AIR SHUTTER
AND HEAD SETTING (if applicable), readjust if
necessary, see Table 8 at rear of manual.

2. OPEN ALL OIL LINE VALVES.

3. Attach a plastic hose to fuel pump vent fi tting and
provide a pan to catch the oil.

4. OPEN FLAME OBSERVATION PORT COVER
on burner swing door.

F. START OIL BURNER.

1. Open vent fi tting on fuel pump.

2. PRESS RED RESET BUTTON on front of burner
cover, hold for one (1) second and release to reset
primary control.

renruB.dekcehcsierutarepmetrelioB
sierutarepmetretawehtnehwstratser

nehwstratserrenruB.ffodenrutsirenruB

ehtwolebsporde

.laitnereffidehtsunimgnittestimilhgih

stuptuolla,detcetedsinoitidnocrorrenafI

lortnoC.ffosirenruB.nwodtuhsera

nehwstratserdnanoitcnufotseunitnoc

eht,ecneuqeskcehcrorreehtgniruD

dnarosnesehtnitfirdrofskcehcmetsys

Figure 26: Adjusting Fuel Pump Pressure

b. Locate oil pressure adjusting screw and turn

screw to obtain proper pump pressure, refer to
Table 8 at rear of manual.

c. To check the cut-off pressure, deadhead a reliable

pressure gauge onto the copper connector tube
attached to the nozzle port. Run the burner for
a short period of time. Shut the burner off. The
pressure should drop and hold.

d. Remove the gauge and install bleeder port and/or

reconnect the nozzle port line.

G. ADJUST OIL BURNER WHILE

OPERATING. (fl ame present)

1. ADJUST DRAFT REGULATOR for a draft of
zero inches (water gauge) in the canopy (see Figure

18) after chimney has reached operating temperature
and while burner is running. (At least fi ve minutes)

See Table 8 at rear of manual for details.

2. READJUST THE AIR BAND on burner for a
light orange colored fl ame while the draft in the
canopy is zero inches water column ("w.c.). Use a

37

38

Figure 27: "L1/L2" and "V1" Head Electrode Positioning and Gun Setting (Beckett AFG)

smoke tester and adjust air for minimum smoke (not
to exceed #1) with a minimum of excess air. Make
fi nal check using suitable instrumentation to obtain
a CO2 of 11.5 to 12.5% with draft of zero inches
water column ("w.c.) (water gauge) in canopy.
These settings will assure a safe and effi cient
operating condition. If the fl ame appears stringy
instead of a solid fi re, try another nozzle of the same
type. Flame should be solid and compact. After
all adjustments are made recheck for a draft of zero
inches water column ("w.c.) in the canopy. Replace
plug at completion.

See Table 8 (at rear of this manual) for details

regarding the overfi re pressure when baffl es are both
installed and removed.

3. READJUST THE HEAD SETTING only if
necessary.

a. MPO84 & MPO147:
Beckett MB(L1 & L2) Head burners have a fi xed

head which are non-adjustable.

b. MPO189 & MPO231:
Beckett MD(V1) (variable) Head burners have

the ability to control air by moving the head. It
might be necessary to move the head forward
or back one position at a time to optimize the
smoke and CO

4. TURN “OFF” BURNER and remove pressure
gauge. Install gauge port/bleeder plug and tighten.
Start burner again.

readings. See Figure 27.

2

2. IF NOZZLE CONTINUES TO DRIP, repeat
Paragraph H, No. 1. If this does not stop the
dripping, remove cut-off valve and seat, and wipe
both with a clean cloth until clean, then replace
and readjust oil pressure. If dripping or after burn
persist replace fuel pump.

I. TEST CONTROLS.

1. Check thermostat operation. Raise and lower
thermostat setting as required to start and stop
burner.

GNINRAW

deredisnocsireliobehtfonoitallatsnierofeB

slortnocreliobllafonoitarepoeht,etelpmoc

yramirpehtylralucitrap,dekcehcebtsum

.lortnoctimilhgihdnalortnoc

2. VERIFY PRIMARY CONTROL FEATURES
using procedures outlined in Instructions furnished
with control or instructions as follows:

a. FEATURES AND CONTROLS

i. The R7184 is a microprocessor-based

control. The indicator light provides
diagnostic information for lockout, recycling
and patented cad cell status. There is a
manual reset button to exit the Lockout
Mode and enter the Idle Mode (see Figure

28).

GNINRAW

.gnitareposirenrubelihw

5. FLAME FAILURE
The MPO boiler controls operate the burner

automatically. If for unknown reasons the burner
ceases to fi re and the reset button on the primary
control has tripped, the burner has experienced
ignition failure.

GNINRAW

.tohyrevsirebmahc

H. CHECK FOR CLEAN CUT OFF OF

BURNER.

1. AIR IN THE OIL LINE between fuel unit and
nozzle will compress when burner is on and will
expand when burner stops, causing oil to squirt from
nozzle at low pressure as the burner slows down and
causing nozzle to drip after burner stops. Usually,
cycling the burner operation about 5 to 10 times will
eliminate air from the oil line.

sgnittifenillioynaevomerronesooltonoD

Figure 28: R7184 Terminals, LED and Reset Button

ii. Pump Priming Cycle: To facilitate purging

air from the oil lines and fi lters, the R7184
can be placed in a purge routine by pressing
and releasing the reset button during the

nehwrenrubehttratsottpmettatonoD

tinuehtnehw,detalumuccasahliossecxe

noitsubmocehtnehwro,ropavfollufsi

safety check, delayed valve-on, ignition or
carry-over periods.

iii. Limited Recycle: This feature limits the

number of recycle trials (for each call
for heat) to a maximum of three trials. If
the fl ame is lost three times and does not
successfully satisfy a call for heat, the
R7184 locks out.

iv. Limited Reset (Restricted Mode): In order

to limit the accumulation of unburned oil in
the combustion area, the control can only be
reset three times. The reset count returns to
zero each time a call for heat is successfully
completed.

39

• To reset from Restricted Mode: Press and

hold the reset button for 30 seconds.
When the LED fl ashes twice, the device
has reset.

v. T-T Jumper: Select models have pre-

installed T-T jumper resistor. To remove
jumper, if applicable, use side-cutting pliers
to cut jumper (See Figure 28).

vi. Diagnostic LED: The indicator light on oil

primary control provides lockout, recycle
and cad cell indications as follows:

• Flashing at 1 Hz (½ second on, ½ second

off): system is locked out or in Restricted
Mode.

• Flashing at ¼ Hz (2 seconds on, 2 seconds

off): control is in Recycle Mode.

• On: cad cell is sensing fl ame.

• Off: cad cell is not sensing fl ame.

vii. Cad Cell Resistance Check: For proper

operation it is important that the cad cell
resistance is below 1600 ohms. During a
normal call for heat, once the control has
entered the Run Mode, press and release the
reset button. Indicator light will fl ash 1 to 4
fl ashes. See Table 7 for equivalent cad cell
resistance.

TABLE 7: CAD CELL RESISTANCE WHEN

SENSING FLAME

sehsalFsmhoniecnatsiseRlleCdaC

1004nahtsseL
2008nahtsseldna004nahteroM
30061nahtsseldna008nahteroM

40005nahtsseldna0061nahteroM

• Check the oil pump pressure.

• Check the piping to the oil tank.

• Check the oil nozzle, oil supply and oil

fi lter.
ii. Check Safety Features
Safe Start:

• Place a jumper across cad cell terminals.

• Follow procedure to turn on burner.

Burner must not start, indicator light turns

on and control remains in Idle Mode.

• Remove jumper.

iii. Simulate Ignition or Flame Failure:

• Follow procedure to turn on burner.

• Close hand valve in oil supply line.

• Failure occurs, device enters Recycle

Mode. Indicator light fl ashes at ¼ Hz rate

2 seconds on, 2 seconds off).

• Device tries to restart system after

approximately 60 seconds.

• After third Recycle Mode trial, safety

switch locks out within safety switch

timing indicated on label and control

enters Restricted Mode. Indicator light

fl ashes at 1 Hz rate (½ second on, ½

second off). Ignition and motor stop and

oil valves closes.

• To reset from Restricted Mode: Press and

hold the reset button for 30 seconds.

When the LED fl ashes twice, the device

has reset.
iv. Cad Cell Check: See Figure 29.

40

b. CHECK OIL PRIMARY CONTROL

NOITUAC

enilfodrazahlaitnetopehtoteuD

decneirepxe,deniartaylno,egatlov

ehtmrofrepdluohsnaicinhcetecivres

ytefasgniwollof

.debircsedsa

i. Preliminary Steps

• Check wiring connections and power

supply.

• Make sure power is on to the controls.

• Make sure limit control is closed.

• Check contacts between ignitor and the

electrodes.

.skcehc

.trapatiekatottpmettatonoD.strap

elbaecivres-dleifonsniatnoclortnocsihT

tonsinoitarepofilortnoceritneecalpeR

Figure 29: Cad Cell Location

• Perform cad cell resistance check as

outlined in control feature. If resistance is

below 1600 OHMS and burner runs

beyond safety cut-out time, cad cell is
good.

• If safety switch shuts down burner and

resistance is above 1600 OHMS, open line
switch to boiler. Access cad cell under

ignitor, clean face of cad cell and see that
cell is securely in socket. Check gasket
around perimeter of ignitor lid for proper
seal. If gasket is missing or damaged,
replace gasket. Room light can effect cad
cell resistance. Reset safety switch.

• Close line switch to boiler. If burner starts

and runs beyond safety switch cut-off
time, cell is good. If not, install new cell.

v. Power Failure Check: After Flame is

established, turn the power off to the control/
burner. The burner should shut down safely.
When power is restored a normal ignition
sequence should be started.

3. WARNING — Check High Limit Control —
Jumper Thermostat Terminals. Allow burner to

operate until shut-down by limit. Installation is not
considered complete until this check has been made.

GNINRAW

.kcehcsihtretfadevomerebtsumrepmuJ

4. CHECK LOW WATER CUT - OFF CONTROL

TNATROPMI

ehtlitnudednettanureliobnurtonoD

.detelpmocsierudecorpgniwollof

Hydrolevel 1150 probe low water cut-off operational
test procedure:

a. Before raising the water level above the Model

1150, turn on power to the boiler and set the
thermostat to call for heat. Both the green
"POWER" LED and amber "LOW WATER"
LED should illuminate. The burner should not
fi re. IMPORTANT: If the burner fi res with no
water at the probe, immediately shut down power
to the boiler and refer to the Trouble Shooting
instructions in manufacturer's literature provided
with the control.

b. Proceed to fi ll the boiler with water. When water

reaches the LWCO position, the burner should
fi re. If the burner does not fi re, refer to the
Trouble Shooting instructions in manufacturer's
literature provided with the control.

c. Turn off the power to the boiler and fi nish fi lling

the system. Lower the thermostat to desired
room temperature setting.

d. Before leaving the job, power up the system

and push the TEST button on the Model 1150
to simulate a low water condition. The amber
"LOW WATER" LED should illuminate and the
burner should shut down.

J. IF CONTROLS DO NOT MEET

REQUIREMENTS outlined in Paragraph I.,

replace control and repeat checkout procedures.

41

noitamrofnIytefaStcudorPtnatropmI

tcudorPrebiFcimareCyrotcarfeR

Warning:
This product contains refractory ceramic fi bers (RCF). RCF has been classifi ed as

a possible human carcinogen. After this product is fi red, RCF may, when exposed
to extremely high temperature (>1800F), change into a known human carcinogen.
When disturbed as a result of servicing or repair, RCF becomes airborne and, if
inhaled, may be hazardous to your health.

AVOID Breathing Fiber Particulates and Dust

Precautionary Measures:
Do not remove or replace previously fi red RCF (combustion chamber insulation,

target walls, canopy gasket, fl ue cover gasket, etc.) or attempt any service or
repair work involving RCF without wearing the following protective gear:

1. A National Institute for Occupational Safety and Health (NIOSH)
approved respirator

2. Long sleeved, loose fi tting clothing

3. Gloves

4. Eye Protection

• Take steps to assure adequate ventilation.

• Wash all exposed body areas gently with soap and water after contact.

• Wash work clothes separately from other laundry and rinse washing

machine after use to avoid contaminating other clothes.

• Discard used RCF components by sealing in an air tight plastic bag.

First Aid Procedures:

• If contact with eyes: Flush with water for at least 15 minutes. Seek
immediate medical attention if irritation persists.

• If contact with skin: Wash affected area gently with soap and water.
Seek immediate medical attention if irritation persists.

• If breathing diffi culty develops: Leave the area and move to a location
with clean fresh air. Seek immediate medical attention if breathing
diffi culties persist.

• Ingestion: Do not induce vomiting. Drink plenty of water. Seek
immediate medical attention.

42

SECTION IX: MAINTENANCE AND SERVICE INSTRUCTIONS

A. MAINTENANCE OF LOW WATER CUT-

OFF DEVICES (when installed)

See Section XIV Appendix for LWCO Installation

Instructions

GNINRAW

.ecnanetniamdnanoitcepsnilaunna

1. PROBE TYPE LOW WATER CUT-OFF
Although these devices are solid state in their

operation, the probe is exposed to possible
contamination in the boiler water and subject to
fouling.

Provisions have been made on the supply manifold

on the boiler. Sometimes the LWCO can be found
in the primary loop of the boiler system. Ideally,
shut off valves have been installed between the loop
containing the LWCO and the rest of the system, to
minimize the amount of system draining.

It is important to physically remove the probe from

the lwco tapping annually and inspect that probe for
accumulation of scale or sediment.

Follow these steps to inspect, clean and/or replace

the probe:
a. Turn off electric service to the boiler.
b. Drain boiler water to a level below the tapping

for the probe.

c. Disconnect wiring connections between the low

water cut-off control and the probe.

d. Remove the low water cut-off control from the

probe.

REGNAD

erusserporeztasireliobehttahterussA

er

ehtnepO.erusserporeztasireliobeht

.detanimilesisnrubrof

e. Unscrew the probe from the LWCO tapping.
f. Inspect that portion of the probe that is exposed

to the water for a scale or sediment buildup.

g. Light deposits may be removed by wiping the

probe with a damp cloth. Wiping the probe with
a cloth soaked in vinegar will remove more

tenacious lime deposits. The most stubborn
deposits may be removed from the probe by
using a diluted amount, 3 parts of water to 1 part
of phosphoric acid (H2PO4).

NOITUAC

eriuqersecivedffo-tucretawwolepyteborP

.reniatnoc

h. Clean the pipe threads of the probe to remove

old, hardened pipe dope and other foreign matter.

i. Apply a moderate amount of good quality pipe

dope to the pipe threads on the probe, leaving the
two end threads bare. Do not use PTFE (Tefl on)

tape.
j. Screw the probe into the LWCO tapping.
k. Mount the low water cut-off control on the

probe.
l. Reconnect the control to probe wiring.
m. Fill the system with water.
n. Add boiler water treatment compound as needed

(refer to Paragraph B.).
o. Restore electric service to the boiler.
p. Fire burner to bring the water in the boiler to a

boil to drive off free oxygen.
q. WARNING — BEFORE RETURNING

BOILER TO SERVICE: Follow the low water

cut-off check out procedure in Section IX,

Paragraph I, No. 4.

B. BOILER AND SYSTEM CLEANING

INSTRUCTIONS FOR TROUBLE FREE
OPERATION

1. Filling of Boiler and System — General —-In a hot
water heating system, the boiler and entire system

tonoD.eborpOCWLehtgnivomererofeb

tahtetacidnioteguagerusserpehtnoyl

erusserplanretnillaeveilerotevlavytefas

egrahcsidevlavytefaS.gnideecorpotroirp

laitnetopehttahthcusdepipebtsumgnipip

(other than the expansion tank) must be full of water
for satisfactory operation. Water should be added to
the system until the boiler pressure gauge registers
12 psi. To insure that the system is full, water should
come out of all air vents when opened.

2. Boiling Out of Boiler and System. The oil and grease
which accumulate in a new hot water boiler can be
washed out in the following manner.

a. Ideally, shut off valves have been installed

between the boiler return manifold and the rest
of the system, to minimize the amount of system
draining.

b. Drain the boiler to a level below the relief valve

tapping.

cirohpsohpgnildnahnehwnoituacesicrexE

stinolebalnoitcurtsniehtwollofdnadica

43

REGNAD

erusserporeztasireliobehttahterussA

ehtnepO.evlavfeilerehtgnivomererofeb

erusserplanretnillaeveilerotevlavytefas

egrahcsidevlavytefaS.gnideecorpotroirp

.detanimilesisnrubrof

c. Remove relief valve using extreme care to avoid

damaging it.

d. Add an appropriate amount of recommended boil

out compound.
e. Replace relief valve.
f. Fill the entire system with water.
g. Start fi ring the boiler.
h. Circulate the water through the entire system.
i. Vent the system, including the radiation.
j Allow boiler water to reach operating

temperature, if possible.
k. Continue to circulate the water for a few hours.

l. Stop fi ring the boiler.
m. Drain the system in a manner and to a location

that hot water can be discharged with safety.
n. Remove plugs from all available returns and

wash the water side of the boiler as thoroughly as

possible, using a high-pressure water stream.
o. Refi ll the system with fresh water.

3. Add appropriate boiler water treatment compounds
as recommended by your qualifi ed water treatment
company.

4. Make pH or Alkalinity Test.

After boiler and system have been cleaned and

refi lled as previously described, test the pH of
the water in the system. This can easily be done
by drawing a small sample of boiler water and
testing with hydrion paper which is used in the
same manner as litmus paper, except it gives
specifi c readings. A color chart on the side of the
small hydrion dispenser gives the reading pH.
Hydrion paper is inexpensive and obtainable from
any chemical supply house or through your local
druggist. The pH should be higher than 7 but lower

than 11. Add appropriate water treatment chemicals,
if necessary, to bring the pH within the specifi ed
range. With this lower level of protection, care must
be exercised to eliminate all of the free oxygen in
the system.

5. Boiler is now ready to be put into service.

laitnetopehttahthcusdepipebtsumgnipip

C. FREQUENT WATER ADDITION
Although unusual for a water boiler, frequent water

additions are a sign of a leaky system. Excessive
amounts of make up water supplied to the boiler can
signifi cantly shorten the life of the boiler. The amount
of water varies with the contamination level of the
water. Repair the leak and consult with your water
treatment specialist for recommendations.

D. ATTENTION TO BOILER WHILE NOT IN

OPERATION.

ECITON

ti,emitretniwgniruddesutonsireliobfI

ezeerftneverpotdeniardyllufebtsum

.egamad

1. Spray inside surfaces with light lubricating or
crankcase oil using gun with extended stem so as to
reach all corners.

2. Always keep the manual fuel supply valve shut off
if the burner is shut down for an extended period of
time.

3. To recondition the heating system in the fall season
after a prolonged shut down, follow the instructions
outlined in Section IX, Paragraphs A through J.

GNINRAW

yamhcihwslortnocsniatnocreliobsihT

tondnanwodtuhsotreliobehtesuac

oteudegamadfI.ecivrestuohtiwtratser

gn

itaeheht,ytilibissopasisepipnezorf

nidednettanutfelebtondluohsmetsys

sdraugefasetairporpparo;rehtaewdloc

ehtnodellatsniebdluohssmraladna

ehtfiegamadtneverpotmetsysgnitaeh

.evitareponisireliob

44

SECTION X: BOILER CLEANING

GNINRAW

.detelpmocsiecivresnehwyletelpmoc

deppiuqesrelioB.ffodenruthctiwsecivresrenrubhtiwdetelpmocebtsumgninaelcreliobllA

,egamadytreporperevesesuacnachcihwdrazahlaitnetopaevahroodgniwsrenrubhtiw

othctiwsecivresffonrut,roodgniwsgninepoerofeB.derongifiefilfossolroyrujnilanosrep

ehttcennocsiD.rebmahcnoitsubmocehtedistuorenrubfogniriflatnediccatneverpotreliob

renetsafroodgniwsnethgitoteruseB.tekcajtnorfehtnielcatpecerehtmorfgulprenrub

A. CLEAN THE FLUEWAYS (See Figure 30).

1. For access to the combustion chamber remove the

two (2) 3/8" - 16 cap screws. If boiler is equipped
with fl exible fuel line(s), swing door open.

2. Remove the two smoke box clean-out covers from
the rear smoke box by removing the four 5/16"-18
hex head bolts. It is NOT necessary to remove the
vent connector from the smoke box to clean boiler.

If necessary, remove the vent connector if there is

evidence of heavy soot accumulation in the boiler
or to inspect bse of chimney for condensate or
accumulation of debris.

3. Remove the baffl es (if installed) from the fl ue
passages. There is a pair of baffl es in each boiler.
The baffl es are installed in the 3rd pass (two outer
fl ueways) on the MPO84, and in the 2nd pass (two
inner fl ue ways) on the MPO147, MPO189 and
MPO231.

4. Clean the 3rd Pass – Insert a 2" dia. x 42" long
wire or fi ber bristle brush into each of the two 3rd
passes. Using long strokes push the brush all the
way through the boiler until the brush has exited
the smoke box opening. Pull the brush all the way
forward until it has exited the front of the boiler.
Continue this operation for the entire height of the
fl ue way until clean. Repeat the operation for the
other 3rd pass fl ue way.

5. Clean the 2
or fi ber bristle brush into each of the two 2nd passes.
Using long strokes push the brush all the way
through the boiler until the brush hits the back wall
of the reversing chamber. Pull the brush all the way
forward until it has exited the front of the boiler.
Continue this operation for the entire height of the
fl ue way until clean. Repeat the operation for the
other 2nd pass fl ue way.

6. Vacuum the loose debris in the bottom of the
combustion chamber and smoke box.

B. CLEAN THE COMBUSTION CHAMBER

– Use a wire or fi ber bristle brush to clean the surfaces
of the combustion chamber. Vacuum all of the loose
debris in the bottom of the combustion chamber.

nd

Pass - Insert a 2" dia. x 42" long wire

C. AFTER CLEANING, vacuum all remaining debris

as necessary. Inspect burner swing door insulation, and
rope gasket for signs of damage. If damaged, replace as
needed.

D. REASSEMBLE BOILER.

NOITUAC

renrubehtsselnurenrubehttratstonoD

erasetalprevocyponacdnaroodgniws

.ecalpnideruces

1 Insert the baffl es (if originally installed) into the

correct fl ue way. The baffl es are installed in the 3rd
pass (two outer fl ueways) on the MPO84, and in
the 2nd pass (two inner fl ue ways) on the MPO147,
MPO189 and MPO23.

2. Attach the smoke box clean-out covers onto the
rear of the boiler. Verify that the rope gasket is
in good working order before assembly. Replace
rope gasket if necessary. Use the 3/8" hardware
originally removed. Do not over tighten. They
should be snug but not bottomed out.

ECITON

ekamroodgniwsrenrubgnirucesnehW

.sedishtobnoyllauqeni-nwardsirooderus

Tighten swing door hardware to provide adequate

seal to rope gasket around perimeter of door.

Use an alternating tightening method from right side

to left side cap screw to pull door tight equally.

ECITON

lliwteksageporehT.nethgitrevotonoD

siroodehtnehwlaestneiciffusedivorp

.ecalpotnidelgguns

45

Figure 30: Cleaning of Boiler Flueways

GNINRAW

daniroytridaotdetcennocsireliobehtfitluserdluocegamad

ytreporpsuoireS.noitidnocdoogniyenmihcdevorppanaotdetcennocebtsumreliobehT

foroiretniehT.yenmihcetauqe

dnanosaesgnitaehehtfotratsehterofebdenaelcdnadetcepsniebtsumeulfyenmihceht

naelcA.snoitcurtsboynarofnosaesgnitaehehttuohguorhtyllacidoirepdetcepsniebdluohs

royrujniesuacdluoctahtsemufsuoixonwollaotyrassecensieulfyenmihcdetcurtsbonudna

.ycneiciffes'reliobehtgniniatniamdrawotetubirtnoclliwdnaylefastnevotefilfossol

46

SECTION XI: TROUBLE SHOOTING

A. COMBUSTION

1. NOZZLES — Although the nozzle is a relatively
inexpensive device, its function is critical to the
successful operation of the oil burner. The selection
of the nozzle supplied with the MPO boiler is the
result of extensive testing to obtain the best fl ame
shape and effi cient combustion. Other brands of the
same spray angle and spray pattern may be used but
may not perform at the expected level of CO
smoke. Nozzles are delicate and should be protected
from dirt and abuse. Nozzles are mass-produced
and can vary from sample to sample. For all of
those reasons a spare nozzle is a desirable item for a
serviceman to have.

2. FLAME SHAPE — Looking into the combustion
chamber through the observation port, the fl ame
should appear straight with no sparklers rolling up
toward the crown of the chamber. If the fl ame drags
to the right or left, sends sparklers upward or makes
wet spots on the chamber walls, the nozzle should
be replaced. If the condition persists look for fuel
leaks, air leaks, water or dirt in the fuel as described
above.

3. FUEL LEAKS — Any fuel leak between the
pump and the nozzle will be detrimental to good
combustion results. Look for wet surfaces in the air
tube, under the ignitor, and around the air inlet. Any
such leaks should be repaired as they may cause
erratic burning of the fuel and in the extreme case
may become a fi re hazard.

4. AIR LEAKS — Any such leaks should be repaired,
as they may cause erratic burning of the fuel and in
extreme cases may become a fi re hazard.

5. GASKET LEAKS — If 11.5 to 12.5% CO2 with a
#1 smoke cannot be obtained in the breeching, look
for air leaks around the burner mounting gasket,
observation door, and canopy gasket. Such air leaks
will cause a lower CO2 reading in the breeching. The
smaller the fi ring rate the greater effect an air leak
can have on CO2 readings.

6. DIRT — A fuel fi lter is a good investment.
Accidental accumulation of dirt in the fuel system
can clog the nozzle or nozzle strainer and produce a
poor spray pattern from the nozzle. The smaller the
fi ring rate, the smaller the slots become in the nozzle
and the more prone to plugging it becomes with the
same amount of dirt.

7. WATER — Water in the fuel in large amounts will
stall the fuel pump. Water in the fuel in smaller
amounts will cause excessive wear on the pump,
but more importantly water doesn’t burn. It chills
the fl ame and causes smoke and unburned fuel to
pass out of the combustion chamber and clog the
fl ueways of the boiler.

and

2

8. COLD OIL — If the oil temperature approaching
the fuel pump is 40°F or lower, poor combustion or
delayed ignition may result. Cold oil is harder to
atomize at the nozzle. Thus, the spray droplets get
larger and the fl ame shape gets longer. An outside
fuel tank that is above grade or has fuel lines in a
shallow bury is a good candidate for cold oil. The
best solution is to bury the tank and lines deep
enough to keep the oil above 40°F.

9. HIGH ALTITUDE INSTALLATIONS — Air
openings must be increased at higher altitudes. Use
instruments and set for 11.5 to 12.5% CO

.

2

10. START-UP NOISE — Late ignition is the cause
of start-up noises. If it occurs recheck for electrode
settings, fl ame shape, air or water in the fuel lines.

11. SHUT DOWN NOISE — If the fl ame runs out of
air before it runs out of fuel, an after burn with noise
may occur. That may be the result of a faulty cut-off
valve in the fuel pump, or it may be air trapped in the
nozzle line. It may take several fi ring cycles for that
air to be fully vented through the nozzle. Water in the
fuel or poor fl ame shape can also cause shut down
noises.

ECITON

snurrenrubehtfI.ecruosrehtona

ehtfotuogniwardnehwyllufsseccus

.etisboj

B. OIL PRIMARY CONTROL

1. Burner (control) will not come on.
a. No power to control.
b. Control is in lockout or restricted mode. Press

reset button for one (1) second to exit lockout. If
control has recycled three times within the same
call for heat, it will enter into restricted mode.
To reset from restricted mode, refer to Section

VIII, Paragraph I, No. 2 for details.
c. CAD cell seeing light.
d. CAD assembly defective.
e. Control motor relay is stuck closed (see note

below).

2. Burner (control) will light, then shut down after a
short time, then restart after one (1) minute.

a. CAD cell is defective.

doogyrevA.ERUDECORPTSETKCEHC
otsismelborpedisleufgnitalosiroftset

"42ahtiwdnametsysleufehttcennocsid

evi

fyrailixuanafotuoerif,gnibutfohtgnel

morflio2#mraw,hserf,naelcfoliapnollag

otdetalosisimelborpehtnehtliapyrailixua

ehtnodesugniebsenilleufroleufeht

47

b. Air leaking into oil line causing fl ame out.
c. Defective nozzle causing fl ame to be erratic.
d. Excessive airfl ow or draft causing fl ame to leave

burner head.

e. Excessive back pressure causing fl ame to be

erratic.

3. Control locks out after Trial For Ignition (TFI).
a. No oil to burner.
b. Shorted electrodes.
c. Nozzle clogged.
d. Airfl ow too high.
e. Ignitor module defective.
f. CAD cell defective.
g. Oil valve stuck open or closed.

Note: The Safety Monitoring Circuit (SMC) is

designed to provide lockout in the event of a
stuck or welded motor relay.

ECITON

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nwonk(noitautcaevlavliofosdnoces

lliwtuokcol)]IFT[noitingIroFlairTsa

deraybdetacidnisituokcoL.rucco

yramirplioehtnodetacolno-dilosDEL

.lortnoc

-skcollortnocehtfiruccolliwpu-hctaL

rofllacagnirudsemit)3(eerhttuo

no-ydaetsybdetacidnisisihT.taeh

.s'DELrebmadnader

SECTION XII: REPAIR PARTS

All MPO Boiler Repair Parts may be obtained through your local Burnham Wholesale distributor. Should you require assistance
in locating a Burnham Distributor in your area, or have questions regarding the availability of Burnham products or repair parts,
please contact Burnham Customer Service at [phone] or Fax [phone].

48

SERVICE RECORD

DATE SERVICE PERFORMED

49

Bare Boiler Assembly

50

metI

.oN

noitpircseD.oNtraP48OPM741OPM981OPM132OPM

YLBMESSARELIOBERAB.1

A1denihcaM,noitceStnorF10-0600011111

B1denihcaM,noitceSretneC10-160001---123

C1denihcaM,noitceSraeR10-2600011111

D1leetSB-2

E1

F1

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H1nialP,tuNxeHyvaeH61-"8/34444

J1

2,elppiNpilS5730066082468

.gL"01x61-"8/3,doReiTreppU170168081---------

.gL"61x61-"8/3,doReiTreppU57016808---1------

.

gL"½12x61-"8/3,doReiTreppU33016808------1---

.gL"½72x61-"8/3,doReiTreppU41016808---------1

TrewoL270168081---------

.gL"¾7x61-"8/3,doRei

.gL"51x61-"8/3,doReiTrewoL61016808---1 ------

.gL"¾02x61-"8/3,doReiTrewoL21016808------1---

.gL

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nommoC

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.gL"8/3-41x"2/1-1x"4/1-1

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.gL"8/3-62x"2/1-1x"4/1-1

10-2100012---------

20-210001---2 ------

30-210001------2---

44 4 4

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N1detalP,egnalFdetarr

P1tekcarBegniH10-4100011111

Q1

R1)ylnO(rooDgniwSrenruBnorItsaC10-1700011111

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tekcarBegniH

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ren

40-210001---------2

44 4 4

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51

Bare Boiler Assembly

52

metI

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noitpircseD.oNtraP48OPM741OPM981OPM132OPM

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S1

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T1rooDgn

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V1revoCtroPnoitavresbO10

W1detalP,EAS,rehsaWtalF"61/5

X1

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53

Jacket Assembly

54

metI

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B27390#ocyeH,elcatpeceRteltuOrewoP2256318 1111

noitpircseD.oNtraP48OPM741OPM981OPM132OPM

C2

D2noitalusnI/wylbmessAlenaPra

E23402#ocyeH,gnihsuBpanS8406318 1111

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G23702#ocyeH,gnihsuBp

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colB,norItsaCnoitceS540-610001---------1

relioBnoitceS210-900

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daeHssurTspillihP,BAepyT"2/1x8#

detalP,wercSlateMteehS,redluohS/w

:roFrepparWnoitalusnIssalgrebiFkcihT"3

ylbmessAkcolB,norItsaCnoitceS210-6100011----

ylbmessAkcolB,norItsaCnoitceS320-610001---1------

ylbmessAkcolB,norItsaCnoitceS430-610001------1---

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relioBnoitceS430-900001------1---

relioBnoitceS540-900001---------1

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qeRnoitalusnIoN(ylbmessAlenaPpoTtekcaJ

relioBnoitceS210-0100011---------

N2

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Q2

R2etalPrekcaBerusolcnErenruBttekceB10082206 1111

S2revoCerusolcnErenruBt

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TtekcaJ

tekceB20082206 1111

relioBnoitceS320-010001---1------

relioBn

relioBnoitceS540-010001---------1

ylbmessAlenaPraeRpo

)deriuqeRnoitalusnIoN(

10-110001 1111

55

56

MPO84 Thru MPO231 Water Boilers - Trim and Controls

METI

.ON

NOITPIRCSED.oNtraP48OPM741OPM981OPM132OPM

SLORTNOCDNAMIRT-SRELIOBRETAW132OPMurhT48OPM.3

:rofteksaG/wrenruBliOGFAttekceB

2077BCB.oNcepS48OPM 10-2500011---------

A3

( :etoN )nwodkaerBstraPrenruBrof

B30801P4817RllewyenoH,lortnoCyramirPliO 948061081111

C3elffaByaweulFssaPdrihTleetSsselniatS 10-

D3elffaByaweulFssaPdnoceSleetSsselniatS 10-240001---111

E3steksaG/wrotalucriC

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57

Beckett AFG Burner

58

BECKETT OIL BURNER PART NOS. FOR MPO SERIES BOILERS

NOTE: When ordering parts always give the serial and model numbers shown on the boiler and burner. Also
provide the name of the part(s) and part number as listed below.

ledoMrelioB48OPM741OPM981OPM132OPM

noitanibmoCebuTriANSAQM07GFANQAMM07GFANSALM07GFANSAKM07GFA

.oNcepSs'ttekceB20

dnaBriA

tuNdnaBriA0514051405140514

wercSdnaBriA8914891489148914

rettuhSriA

wercSrettuhSriA8914891489148914

leehWrewolB9992999299929992

gnilpuoC4542454245424542

elffaBetaRgniriFwoL

tunkcoLdelrunKdaehkluB666-3666-3666-3666-3

ylbmessAebuTrotcennoC6365636563656365

pmalCedortcelE94-194-194-194-

wercSpmalCedortcelE9124912491249124

ylbmessArotalusnIedortcelE0875087508750875

ylbmessArecapSredipS305-5305-5305-

etalPnoehctucsE39433943

ylbmessAetalPgnitsujdA------

77BCB3077BCB4077BCB5077BCB

04813

9073

8073---

294329432943

907390739073

------

5305-5

14951495

1

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59

XIV. LOW WATER CUT-OFF (LWCO) ON HOT WATER BOILERS

GNINRAW

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.snoitcurtsnis'rerutcafunam)OCWL(ffOtuCretaWwoLehtwollof,sesacllanI

.)OCWL(ffOtuCretaWwoLtekramretfanallatsniotseriwyrotcaftucotTPMETTATONOD

When

A low water cut-off is required to protect a hot water

boiler when any connected heat distributor (radiation)
is installed below the top of the hot water boiler (i.e.
baseboard on the same fl oor level as the boiler). In
addition, some jurisdictions require the use of a LWCO
with every hot water boiler.

Where

The universal location for a LWCO on both gas and oil

hot water boilers is above the boiler, in either the supply
or return piping. The minimum safe water level of a
water boiler is at the uppermost top of the boiler; that
is, it must be full of water to operate safely. Provisions
have been made on the MPO supply manifold for a
LWCO.

What Kind

Typically, in residential applications, a probe type
LWCO is used instead of a fl oat type, due to their
relative costs and the simplicity of piping for a probe
LWCO.

How to Pipe

Attach the LWCO to the 3/4" NPT connection on the
supply manifold. See Figure A2 for more details.

Ideally, manual shutoff valves should be located

above the LWCO and the boiler to allow for servicing.
This will allow probe removal for inspection without
draining the heating system. Many probe LWCO
manufacturers recommend an annual inspection of the
probe.

How to Wire

A. AFTERMARKET LWCO

The 120 VAC confi guration can be universally
applied to both gas and oil boilers by wiring it in
the line voltage service to the boiler (after the
service switch, if so equipped).

The presence of water in a properly installed
LWCO will cause the normally open contact of the
LWCO to close, thus providing continuity of the
120 VAC service to the boiler.

It is recommended to supply power to the probe
LWCO with the same line voltage boiler service as
shown in Figure A1. See Figure 20 (of this manual)
for more details.

Figure A1: Wiring of Aftermarket LWCO

B. MPO LWCO

To simplify installation, the MPO LWCO can be
easily installed by removing the LWCO jumper
inside the internal junction box and connecting the
harness into the boiler Molex plug.
Refer to Section II, Paragraph F, Item 2 (of this
manual) for more details.

How to Test

Shut off fuel supply. Lower water level until water
level is BELOW the LWCO. Generate a boiler demand
by turning up thermostat. Boiler should not attempt to
operate. Increase the water level by fi lling the system.
The boiler should attempt to operate once the water
level is above the LWCO.

60

Figure A2: LWCO Location

61

SERVICE RECORD

DATE SERVICE PERFORMED

62

erusserP

3

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dluoc132OPM:elpmaxE.

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NI

2

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selffaB

TUO

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3

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2

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3

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NI

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2

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2500 010.0500.0

5600 040.0020.0

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dn

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8100 050.0030.0

9300 040.0030.0

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TABLE 8: BURNER SPECIFICATIONS

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48OPM06.02L6

setoN

63

Limited Warranty

FOR RESIDENTIAL CAST IRON WATER BOILERS

Subject to the terms and conditions set forth below, U.S. Boiler™
Co., Inc. Lancaster, Pennsylvania hereby extends the following limited
warranties to the original owner of a residential grade water boiler
manufactured and shipped on or after July 1,1991:

ONE YEAR LIMITED WARRANTY

ON RESIDENTIAL GRADE WATER BOILERS

U.S. Boiler Co., Inc. warrants to the original owner that its residential
grade water boilers comply at the time of manufacture with recognized
hydronic industry standards and requirements then in effect and will be
free of defects in material and workmanship under normal usage for a
period of one year from the date of original installation. If any part of a
water boiler is found to be defective in material or workmanship during
this one year period, U.S. Boiler Co., Inc. will, at its option, repair or
replace the defective part.

LIFETIME LIMITED WARRANTY ON HEAT EXCHANGER

U.S. Boiler Co., Inc. warrants to the original owner that the heat
exchanger of its residential grade water boilers will remain free from
defects in material and workmanship under normal usage for the
lifetime of the original owner at the original place of installation. If a
claim is made under this warranty during the fi rst ten years from the
date of original installation, U.S. Boiler Co., Inc. will, at its option, repair
or replace the heat exchanger. If a claim is made under this warranty
after the expiration of ten years from the date of original installation,
U.S. Boiler Co., Inc. will, at its option and upon payment of the pro-rated
service charge set forth below, repair or replace the heat exchanger.
The service charge applicable to a heat exchanger warranty claim is
based upon the number of years the heat exchanger has been in service
and will be determined as a percentage of the retail price of the heat
exchanger model involved at the time the warranty claim is made as
follows:

sraeY

ecivreSnI

egrahCecivreS

fo%sa

ecirPliateR

sraeY

ecivreSnI

egrahCecivreS

fo%sa

ecirPliateR

NOTE: If the heat exchanger model involved is no longer available due to
product obsolescence or redesign, the value used to establish the retail
price will be the published price as shown in the Burnham Hydronics
Repair Parts Price Sheet where the heat exchanger last appeared or the
current retail price of the then nearest equivalent heat exchanger.

ADDITIONAL TERMS AND CONDITIONS

1. Applicability: The limited warranties set forth above are extended
only to the original owner at the original place of installation within the
United States and Canada. These warranties are applicable only to
water boilers designated as residential grade by U.S. Boiler Co., Inc.
and installed in a single or two-family residence and do not apply to
steam boilers of any kind or to commercial grade boilers.

2. Components Manufactured by Others: Upon expiration of the one
year limited warranty on residential grade water boilers, all boiler
components manufactured by others but furnished by U.S. Boiler
Co., Inc. (such as oil burner, circulator and controls) will be subject
only to the manufacturer’s warranty, if any.

3. Proper Installation: The warranties extended by U.S. Boiler Co., Inc.
are conditioned upon the installation of the residential grade water
boiler in strict compliance with U.S. Boiler Co., Inc. installation
instructions. U. S. Boiler Co., Inc. specifi cally disclaims liability of any
kind caused by or relating to improper installation.

4. Proper Use and Maintenance: The warranties extended by U.S.
Boiler Co., Inc. conditioned upon the use of the residential grade
water boiler for its intended purposes and its maintenance
accordance with U. S. Boiler Co., Inc. recommendations and

01-111213141516171

oN

5015102520353

egrahC

81910212223242

0454055506560757

evoba

hydronics industry standards. These warranties will be inapplicable if
the residential grade water boiler is used or operated over its rated
capacity, is subjected to unauthorized modifi cation, or is damaged as
a result of being otherwise improperly operated or serviced including,
but not limited to, damage from any of the following: operation with
insuffi cient water, allowing the boiler to freeze, subjecting the boiler
to fl ood conditions, and operation with unapproved water or fuel
additives which cause deposits or corrosion.

5. Removal and Installation: These warranties do not cover expenses of
removal or reinstallation. The owner is responsible for the cost of
removing and reinstalling any defective part and its replacements
and all labor and material connected therewith.

6. Exclusive Remedy: U.S. Boiler Co., Inc. obligation for any breach of
these warranties is limited to the repair or replacement of its parts in
accordance with the terms and conditions of these warranties.

7. Limitation of Damages: Under no circumstances shall U.S. Boiler
Co., Inc. be liable for incidental, indirect, special or consequential
damages of any kind whatsoever under these warranties, including,
but not limited to, injury or damage to persons or property and
damages for loss of use, inconvenience or loss of time. U.S. Boiler
Co., Inc. liability under these warranties shall under no circumstances
exceed the purchase price paid by the owner for the residential grade
water boiler involved. Some states do not allow the exclusion or
limitation of incidental or consequential damages, so the above
limitation or exclusion may not apply to you.

8. Limitation of Warranties: These warranties set forth the entire
obligation of U.S. Boiler Co., Inc. with respect to any defect in a
residential grade water boiler and U.S. Boiler Co., Inc. shall have no
express obligations, responsibilities or liabilities of any kind
whatsoever other than those set forth herein. These warranties are
given in lieu of all other express warranties.

ALL APPLICABLE IMPLIED WARRANTIES, IF ANY, INCLUDING
ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE ARE EXPRESSLY LIMITED IN DURATION TO
A PERIOD OF ONE YEAR EXCEPT THAT IMPLIED WARRANTIES, IF
ANY, APPLICABLE TO THE HEAT EXCHANGER IN A RESIDENTIAL

dna52

GRADE WATER BOILER SHALL EXTEND TO THE ORIGINAL OWNER
FOR THE LIFETIME OF THE ORIGINAL OWNER AT THE ORIGINAL
PLACE OF INSTALLATION. SOME STATES DO NO ALLOW LIMITATION
ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE
LIMITATION MAY NOT APPLY TO YOU.

PROCEDURE FOR OBTAINING WARRANTY SERVICE

In order to assure prompt warranty service, the owner is requested to
complete and mail the attached Warranty Card within ten days after the
installation of the boiler, although failure to comply with this request will
not void the owner’s rights under these warranties.

Upon discovery of a condition believed to be related to a defect in
material or workmanship covered by these warranties, the owner should
notify the installer, who will in turn notify the distributor. If this action is
not possible or does not produce a prompt response, the owner should
write to U.S. Boiler Co., Inc., Burnham Hydronics, at P.O. Box 3079,
Lancaster, PA 17604, giving full par ticulars in support of the claim.

The owner is required to make available for inspection by U.S.
Boiler Co., Inc. or its representative the parts claimed to be defective
and, if requested by U.S. Boiler Co., Inc. to ship these parts prepaid to
U.S. Boiler Co., Inc. at the above address for inspection or repair. In
addition, the owner agrees to make all reasonable efforts to settle any
disagreement arising in connection with a claim before resorting to legal
remedies in the courts.

THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AND YOU
MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO
STATE.

03/03