Weil-McLain 88 Boiler Data Sheets

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Weil-McLain 88 Boiler Data Sheets | Manualzz

88

Water & steam boilers – Series 2

for use with Gas, Light Oil, & Gas/Light Oil – Fired Burners

Boiler Manual

• Installation

• Startup

• Maintenance

• Parts

For additional information, refer to . .

Burner specification and data sheets

for burners pre-tested with model 88 boilers

This manual must only be used by a qualified heating installer/service technician. Read all instructions before installing. Follow all instructions in proper order. Failure to comply could result in severe personal injury, death or substantial property damage.

When calling or writing about the boiler—

Please have the boiler model number from the boiler rating label and the CP number from the boiler jacket.

INSTALLER

Consider piping and installation when determining boiler location.

Any claims for damage or shortage in shipment must be filed immediately against the transportation company by the consignee.

USER . . . .

This manual is for use only by your qualified heating installer/service technician. Boiler and burner must be installed by a qualified service technician. We recommend regular service by a qualified service technician, at least annually.

Part No. 550-100-068/0308

2

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Read before proceeding

Hazard Definitions

The following defined terms are used throughout this manual to bring attention to the presence of hazards of various risk levels, or to important information concerning the life of the product.

Indicates presence of hazards that

will cause severe

personal injury, death or substantial property damage if ignored.

Indicates presence of hazards that

can cause severe

personal injury, death or substantial property damage if ignored.

Indicates presence of hazards that

will or can cause minor

personal injury, death or substantial property damage if ignored.

Indicates special instructions on installation, operation or maintenance that are important but not related to personal injury.

Read before proceeding:

Read all instructions before installing. Failure to follow all instructions in proper order can cause severe personal injury, death or substantial property damage.

Do not use petroleum-based cleaning or sealing components in boiler system. Severe damage to system components can result, causing substantial property damage.

Propane boilers only

— Your propane supplier mixes an odorant with the propane to make its presence detectable. In some instances, the odorant can fade and the gas may no longer have an odor.

■ Propane gas can accumulate at floor level. Smell near the floor for the gas odorant or any unusual odor. If you suspect a leak, do not attempt to light the burner.

■ Use caution when attempting to light a propane burner (or pilot burner). This should be done by a qualified service technician, particularly if flame outages (or pilot outages) are common.

■ Periodically check the odorant level of your gas.

■ Inspect boiler and system at least yearly to make sure all gas piping is leak-tight.

■ Consult your propane supplier regarding installation of a gas leak detector. There are some products on the market intended for this purpose. Your supplier may be able to suggest an appropriate device.

Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Contents

Before installing boiler

4

Set boiler in place

7

Assembling the block

8

Perform hydrostatic pressure test

11

Complete block assembly

12

Connect water boiler piping

14

Connect steam boiler piping

16

Install jacket

20

Pipe tankless heaters

25

Install water boiler controls

26

Install steam boiler controls

27

Connect breeching and venting systems

29

Install burner & wiring and fill system

31

Install fuel piping

32

Make final adjustments

33

Handling ceramic fiber and fiberglass materials

34

Ratings

35

Dimensions

36

Parts

38

Warranty

40

Part No. 550-100-068/0308 3

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Before installing boiler

Installation must comply with —

1.

2.

3.

4.

5.

State, provincial and local plumbing, heating and electrical codes.

Regulations of servicing utilities.

ASME Section IV, Low Pressure Boiler and Pressure Vessel Code.

National Fuel Gas Code, ANSI/NFPA 54, when applicable.

National codes where applicable.

Before selecting boiler location

1.

2.

Check for nearby connections to: a. b. c. d. e.

Fuel supply.

Electrical power.

System water or steam piping.

Venting systems - see page 29.

Combustion and ventilation air supply — see page 5.

Check area around boiler. Remove any combustible materials, gasoline and other flammable vapors and liquids.

Failure to keep boiler area clear and free of combustible materials, gasoline and other flammable liquids and vapors can result in severe personal injury, death and substantial property damage.

Provide clearance around boiler

1.

2.

3.

Provide minimum clearances to combustible materials:

Boiler top

Boiler flue

Boiler rear

— 24 inches.

Boiler front

— 9 inches.

— 9 inches.

Boiler sides

— 48 inches.

— 6 inches.

Single-wall vent pipe

– 18 inches.

Double-wall vent pipe

– refer to vent pipe manufacturer's recommendations for vent pipe clearances.

Boiler may be installed on combustible flooring.

See page 36 for boiler dimensions.

4.

Flue pipe/breeching clearances take precedence over jacket clearances.

Provide minimum clearances for servicing:

Left side

— for cleaning and tankless heater removal –

39 inches.

Rear

— for breeching — 36 inches.

Allow sufficient space on remaining sides for cleaning, servicing and burner installation. See burner literature for length and recommended service clearances.

Lay a foundation, if needed

1.

2.

Floor construction and condition must be suitable for weight of boiler when filled with water. See page 36 for approximate boiler operating weight.

A level concrete or brick foundation, constructed per Figure 1 and

Figure 2 is required when: a. b.

A floor could possibly become flooded.

Non-level conditions exist.

4

Figure 1

Boiler foundation, when required

Boiler model number

1188

1288

1388

1488

1588

1688

1788

1888

488

588

688

788

888

988

1088

Figure 2

Boiler foundation (see Figure 1)

Length,

L

, minimum

(inches)

81

89

97

105

33

41

49

57

65

73

113

121

129

137

145

Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Before installing boiler

(continued)

Combustion and ventilation air openings

Figure 3

Combustion and ventilation air openings

— Boiler room below grade

Adequate combustion and ventilation air must be provided to assure proper combustion and prevent possibility of flue gas leakage and carbon monoxide emissions, causing severe personal injury or death.

Do not install an exhaust fan in boiler room. Incorrect burner operation can result.

When combustion and ventilation air enters through side wall openings, ensure that the openings comply with the requirements of Figure 3 and

Figure 4.

Opening sizes must comply with state, provincial or local codes. In the absence of local requirements, use the National Fuel Gas Code, ANSI/NFPA 54). The following information is taken from ANSI/NFPA 54.

For details and information not addressed below, refer to the standard.

Figure 4

Combustion and ventilation air openings

— Boiler room partially or completely above grade

Combustion air openings to inside

Required volume of interior spaces

ANSI/NFPA 54 allows combustion air to be supplied through openings to interior spaces

if the volume of the connected interior spaces meets the minimum volume required by the standard

.

The minimum volume of interior spaces can be taken as 50 cubic feet per 1,000 Btuh of all appliances in the spaces, or the minimum volume can be calculated using the formulas given in ANSI/NFPA 54. Exception: If the air infiltration rate for the spaces is known to be less than

0.40 air changes per hour, the minimum volume must be calculated as specified in the standard.

Inside air opening sizes and locations

For spaces that provide the minimum volume required by ANSI/

NFPA 54, the air openings must be sized per the following:

Combining spaces on the same story —

Each opening shall have a minimum free area of 1 in

(0.06 m 2

2 /1000 Btuh (2200 mm 2 /kW) of the total input rating of all appliances in the space but not less than 100 in 2

). One opening shall commence within 12 inches (300 mm) of the top, and one opening shall commence within 12 inches (300 mm) of the bottom, of the enclosure. The minimum dimension of air openings shall be not less than 3 inches (80 mm).

Combining spaces in different stories —

The volumes of spaces in different stories shall be considered as communicating spaces where such spaces are connected by one or more openings in doors or floors having a total minimum free area of 2 in of total input rating of all appliances.

2 /1000 Btuh (4400 mm 2 /kW)

Part No. 550-100-068/0308

Combustion air openings to outside

Outdoor combustion air can be taken through permanent openings (TWO or ONE), as described in the following. The minimum dimension of air openings shall not be less than 3 inches (80 mm).

Outside openings: TWO permanent openings method

Two permanent openings, one commencing within

12 inches (300 mm) of the top and one commencing within 12 inches (300 mm) of the bottom of the enclosure shall be provided. The openings shall communicate directly, or by ducts, with the outdoors or spaces that

5

6

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Before installing boiler

(continued)

freely communicate with the outdoors, as follows:

Where directly communicating with the outdoors or where communicating to the outdoors through vertical ducts, each opening shall have a minimum free area of 1 in

(550 mm 2

2 /4000 Btuh

/kW) of total input rating of all appliances in the enclosure.

Where communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of

1 in 2 /2000 Btuh (1100 mm 2 /kW) of total input rating of all appliances in the enclosure.

Outside openings: ONE permanent opening method

One permanent opening, commencing within 12 inches (300 mm) of the top of the enclosure, shall be provided. The appliance shall have clearances of at least 1 in. (25 mm) from the sides and back and 6 inches (150 mm) from the front of the appliance. The opening shall directly communicate with the outdoors or shall communicate through a vertical or horizontal duct to the outdoors or spaces that freely communicate with the outdoors and shall have a minimum free area of the following:

(1) 1 in 2 /3000 Btu/hr (700 mm 2 per kW) of the total input rating of all appliances located in the enclosure, and . . .

(2) Not less than the sum of the areas of all vent connectors in the space.

Combustion air — combination indoor and outdoor openings

ANSI/NFPA 54 allows combustion air to be taken from a combination of openings to outside and to interior spaces. Follow all requirements of the standard to determine the minimum volume of interior spaces and to calculate minimum sizes of openings.

Engineered Installations

Engineered combustion air installations shall provide an adequate supply of combustion, ventilation, and dilution air and shall he approved by the authority having jurisdiction.

Mechanical Combustion Air Supply

Where all combustion air is provided by a mechanical air supply system, the combustion air shall be supplied from outdoors at the minimum rate of 0.35 ft 3 /minute per

1000 Btuh (0.034 m 3 /min per kW) for all appliances located within the space.

Where exhaust fans are installed in the building, additional air shall be provided to replace the exhausted air.

Each of the appliances served shall be interlocked to the mechanical air supply system to prevent main burner operation where the mechanical air supply system is not in operation.

Where combustion air is provided by the building’s mechanical ventilation system, the system shall provide the specified combustion air rate in addition to the required ventilation air.

Louvers, Grilles, and Screens.

The required size of openings for combustion, ventilation, and dilution air shall be based on the

net free area

of each opening.

Where the free area through a design of louver or grille or screen is known, it shall be used in calculating the size opening required to provide the free area specified.

Where the louver and grille design and free area are not known, it shall be assumed that wood louvers will have

25 percent free area, and metal louvers and grilles will have 75 percent free area.

Non-motorized louvers and grilles shall be fixed in the open position.

Minimum screen mesh size

Screens shall not be smaller than ¼ inch mesh.

Motorized louvers

Motorized louvers shall be interlocked with the appliance so they are proven in the full open position prior to main burner ignition and during main burner operation. Means shall be proved to prevent the main burner from igniting should the louver fail to open during burner startup, and to shut down the main burner if the louvers close during burner operation.

Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Set boiler in place

Ensure the equipment and cables used for lifting are designed to handle the load. See Figure 5 for approximate weights of model 88 section assemblies. Failure to comply can result in severe personal injury, death or substantial property damage.

For packaged boiler:

1. Remove top jacket panels. Set aside until after boiler is piped.

2.

3.

4.

5.

6.

The boiler contains ceramic fiber and fiberglass materials.

Use care when handling these materials per instructions on "Handling ceramic fiber and fiberglass materials," page 34 of this manual. Failure to comply could result in severe personal injury.

Remove lag screws (2 in front, 2 in rear) from shipping rails.

Remove boiler from skid. Cables are already attached to block assembly. See Figure 5 for lifting weight.

Using crane — hook middle of each cable to eye of crane.

Using hoist — hook middle of each cable to hoist. Raise boiler off skid. Use pipe rollers under skid angles to roll boiler.

Place boiler in final position. Center boiler on foundation, if used.

Level boiler. Shim under skid angles, if necessary.

Cut off cables.

7.

Cables are not intended for long-term usage. Cables may corrode inside boiler, weakening their lifting strength.

Failure to remove cables can result in severe personal injury, death or substantial property damage.

Proceed to "Perform hydrostatic pressure test," page 11.

For block assembly:

1.

2.

3.

4.

5.

Remove lag screws (2 in front, 2 in rear) from shipping rails.

Remove boiler from skid. Cables are already attached to block assembly. See Figure 5 for lifting weight.

• Using crane – attach free end of cables to eye of crane.

• Using hoist – attach free end of cables to hoist. Raise boiler off skid.

Use pipe rollers under steel skid angles to roll boiler.

Place boiler in final position. Center boiler on foundation, if used.

Level boiler. Shim under skid angles, if necessary.

Cut off cables.

6.

Cables are not intended for long-term usage. Cables may corrode inside boiler, weakening their lifting strength.

Failure to remove cables can result in severe personal injury, death or substantial property damage.

Inspect block assembly for disjointed sections. Check gas-tight seal of flue collector hood and cleanout plates.

1588

1688

1788

1888

1188

1288

1388

1488

488

588

688

788

888

988

1088

Figure 5

Section assembly lifting weights

Boiler model number

Approximate lifting weight

(pounds)

5276

5838

6400

7062

2928

3490

4152

4714

7624

8186

8748

9310

9872

10,584

11,146

Minimum sling length —

(from crane hook to boiler lifting lugs)

5' 0"

6' 0"

6' 6"

7' 0"

2' 6"

3' 0"

4' 0"

4' 6"

8' 0"

8' 6"

9' 0"

10' 0"

10' 6"

11' 0"

12' 0"

7. a. b. c.

Gas tight seal must be maintained to prevent possible flue gas leakage and carbon monoxide emissions, resulting in severe personal injury or death.

Check inside section assembly for any light passing through unsealed areas.

Mark all unsealed areas.

At unsealed areas, check for:

Damaged gaskets.

Sealing rope not in place.

d.

• Loose bolts or nuts.

Correct all conditions and repeat step b. If unsealed areas still exist, contact your Weil-McLain distributor or sales office before continuing installation.

Proceed to page 11.

"Perform hydrostatic pressure test,"

Part No. 550-100-068/0308 7

8

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Assembling the block

Figure 6

Sealing rope installation

Sections are top heavy. Unbolted sections may fall if not supported, resulting in severe personal injury or death.

Prepare and position back section

1. Apply 1

/

8

" continuous bead of sealing rope adhesive in sealing rope grooves. See Figure 6.

Do not get any adhesive on machined port surfaces

.

2. Place ½" sealing rope in groove. Around curves, grasp at 1" intervals and push together. Do not stretch.

Do not pre-cut rope. Gas tight seal must be maintained to prevent possibility of flue gas leakage and carbon monoxide emissions, causing severe personal injury or death. Cut rope as each section is completed.

3. Remove any grit from port machined surfaces with clean rag.

Do not use petroleum-based cleaning or sealing compounds in boiler system. Severe damage to system components can result, causing substantial property damage.

4. Place 9" and 6" sealing rings in appropriate port openings. See

Figure 6. If sealing ring slips out of groove, stretch ring gently for several seconds, then reposition in groove.

5. Apply continuous bead of silicone sealant no larger than 1

/

16

" around entire outside edge of

outer

machined surface of port.

Refer to Figure 7.

Do not apply silicone sealant on, next to or under sealing ring

.

Silicone sealant applied as specified above prevents unburned oil vapors from coming in contact with sealing ring. Vapor contact can damage rings, resulting in severe damage to boiler and substantial property damage.

6. Hoist back section upright. Then temporarily screw a 6-inch threaded pipe at least 36 inches long into the lower (return) tapping.

7. Hoist the section and put into position.

8. Place a block under the 6-inch pipe to hold the back section upright and plumb.

The back section must be plumb before installing other sections to ensure the block will assemble correctly.

9. The 6-inch support pipe and block can be removed after several sections have been installed, and the assembly is stable.

10. Install intermediate sections as described on the following page.

Figure 7

Silicone sealant

Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Assembling the block

Figure 8

Sealing ring installation and port alignment

Sections are top heavy. Unbolted sections may fall if not supported, resulting in severe personal injury or death.

Install intermediate sections

1. Remove and discard 3

/

8

" diameter shipping tie rods.

2. Remove grit from port machined surfaces with clean rag.

Do not use petroleum-based cleaning or sealing compounds in boiler system. Severe damage to system components can result, causing substantial property damage.

3. Position intermediate section so aligning lugs fit into sockets of next section. See Figure 8.

4. Install TI (tankless intermediate) and SI (supply intermediate) sections (when used) in order shown in Figure 9, page 10.

5. Draw sections together until metal-to-metal contact is made around machined port openings (see Figure 8): a. Oil threads on 4 draw rods. Install washer and nut on end to be tightened. Use nut only on other end.

b. Uniformly draw sections together, starting at washer/nut end.

Important — Leave an equal amount of thread on each end of the draw rod. This is needed to allow securing the jacket support brackets in place. The draw rods must not extend past the face of the front or back section, or they will interfere with the jacket.

c. d.

Draw rods should be torqued to a range of 90 to 100 ft-lbs. Do not back off draw rods.

Metal-to-metal contact will be achieved around port openings.

See Figure 8. If gap occurs, it should be no greater than .032".

Check with feeler gauge.

e. If, for any reason, gap around machined port opening exceeds

.032", check for rope extending from rope grooves, dirt on port openings or sockets, or misaligned lugs. If corrections are made and gap still exists, contact your Weil-McLain distributor or sales office before continuing installation.

After erecting first intermediate section, check both sections for plumb. Failure to plumb sections can cause misaligned piping and breeching, possibly resulting in property damage.

6. Repeat steps 1-5.

7. Check each section for proper sealing rope position before proceeding to next section.

Failure to position sealing rope properly can cause boiler to not seal gas-tight.

Gas tight seal prevents possible flue gas leakage and carbon monoxide emissions, resulting in severe personal injury or death.

8. Install remaining intermediate sections and front section using the same procedure.

If using tankless heater (TI) sections

• Install tankless heaters and gaskets or heater cover plates and gaskets. Use

3

/

8

" x

3

/

4

" studs, washers and nuts.

Part No. 550-100-068/0308 9

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Assembling the block

(continued)

10

488 W&S

588 W&S

688 W&S

788 W&S

888 W&S

988 W&S

1088 W&S

1188 W&S

1288 W

1288 S

1388 W

1388 S

1488 W

1488 S

1588 W

1588 S

1688 W

1688 S

1788 W

1788 S

1888 W

1888 S

Figure 9

Section arrangement

Boiler model number

W = water

S = steam

Max number of tankless heaters

Section arrangement

(all heaters must be on left side of boiler)

F = front / B = back / I = Intermediate

TI = tankless intermediate SI = supply intermediate (steam only)

"I" can be substituted for "TI" sections

5

7

7

7

4

6

5

5

6

6

8

8

6

7

8

2

3

1

2

3

4

4

F • TI • I • B

F • TI • I • TI • B

F • TI • I • TI • I • B

F • TI • I • TI • I • TI • B

F • TI • I • TI • I • TI • I • B

F • TI • I • TI • I • TI • I • TI • B

F • TI • I • TI • I • TI • I • TI • I • B

F • TI • I • TI • I • TI • I • TI • I • TI • B

F • TI • I • TI • I • TI • I • TI • I • TI • I • B

F • TI • I • TI • I • SI • I • TI • I • TI • I • B

F • TI • I • TI • I • TI • I • TI • I • TI • I • TI • B

F • TI • I • TI • I • TI • SI • TI • I • TI • I • TI • B

F • TI • I • TI • I • TI • I • TI • I • TI • I • TI • I • B

F • TI • I • TI • I • TI • I • SI • I • TI • I • TI • I • B

F • TI • I • TI • I • TI • I • TI • I • TI • I • TI • I • TI • B

F • TI • I • TI • I • TI • I • TI • SI • TI • I • TI • I • TI • B

F • TI • I • TI • I • TI • I • TI • I • TI • I • TI • I • TI • I • B

F • TI • I • TI • I • TI • SI • TI • I • TI • I • TI • I • TI • I • B

F • TI • I • TI • I • TI • I • TI • I • TI • I • TI • I • TI • I • TI • B

F • TI • I • TI • SI • TI • I • TI • I • TI • SI • TI • I • TI • I • TI • B

F • TI • I • TI • I • TI • I • TI • I • TI • I • TI • I • TI • I • TI • I • B

F • TI • I • TI • I • SI • I • TI • I • TI • I • SI • I • TI • I • TI • I • B

Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Perform hydrostatic pressure test

Prepare boiler and test:

1.

2.

See Figure 10 and Figure 11 for tapping locations. Install: a. b. c.

Boiler drain (not furnished).

Water pressure gauge — for test only. Be sure gauge can handle test pressure — see step 3.

Air vent in upper tapping (K).

Plug remaining tappings.

Do not pressure test with any control installed. Damage to control can occur due to overpressure.

3. Fill boiler. Vent all air. Pressure test at least 10 minutes at a pressure not less than the following: a. b.

Steam

Water

boiler:

boiler:

pressure

Between 45 and 55 psig

.

1½ times maximum allowable working

(MAWP) stamped on the boiler nameplate, located on boiler jacket front panel.

Do not exceed above test pressures by more than 10 psig.

4.

Do not leave boiler unattended. Cold water fill could expand and cause excessive pressure, resulting in severe personal injury, death or substantial property damage.

Check for maintained gauge pressure and leaks. Repair if found.

Leaks must be repaired at once. Failure to do so can damage boiler, resulting in substantial property damage.

5.

Do not use petroleum-based cleaning or sealing compounds in boiler system. Severe damage to system components can result, causing substantial property damage.

Drain boiler and remove air vent, boiler drain and gauge. Remove plugs from tappings that will be used for controls and accessories.

Figure 10

Boiler tapping locations and sizes (see Figure 11)

Location

A

B

L

C1 & C2

C1

D1 & D2

E1 & E2

F1 & F2

G

H

K

Size

2"

2"

1"

1"

1"

½"

C\,

"

¾"

¾"

1"

Steam

Steam relief valve and/or

Skim tapping

Steam relief valve

Secondary probe LWCO

Low water cut-offs

Alternate low water cut-offs

Gauge glass

Try cock tappings

Pressure limit control,

Pressure operating control and pressure gauge,

Firing rate pressure control

(when used)

Boiler drain (see Figure 17, page page 15, for system blowoff (drain) valve locations and sizes

Water

High limit

Manual reset limit

Water relief valve

Not used — Plug

Alternate low water cut-offs

Combination high and low limit control

Firing rate temperature control (when used)

Low water cut-offs

Combination pressure– temperature gauge

Boiler drain

Piping to compression tank or automatic air vent

Part No. 550-100-068/0308

Figure 11

Boiler tappings

11

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Complete block assembly

Install burner mounting plate on front section

1.

2.

Install four ½" x 3½" studs to secure burner mounting plate to section: a. b. c.

Thread and lock together two nuts on rounded end of stud.

Thread flat end of stud into one of four holes located around opening.

Remove nuts.

Repeat steps a and b for remaining studs.

Install burner mounting plate: a. b. c.

Apply 1

/

8

" continuous bead of sealing rope adhesive in groove around opening in section.

Position ½" sealing rope in groove. Overlap ends at least one inch.

Install burner mounting plate with part number and the word,

"

UP,

" positioned at top. Use ½" washers and nuts.

Install observation port assemblies on front and back sections

1. Install front observation port assembly: a. Apply 1

/

8

" continuous bead of sealing rope adhesive in groove on observation port.

2. b. c.

Position 3

/

8

" sealing rope in groove.

Secure assembly to section. Use 10-32 x ¾" truss-head screws.

Repeat above steps for back observation port assembly.

Insert HXT-bars

1.

2.

See Figure 12, page 12.

Flue HXT-bars are identified by painted ends. They must be inserted as shown, with the HXT-bars in the sequence:

Top

position

red

-tipped, HXT-bar 24 inches long — place on the top row of pins.

Middle

position

white

-tipped HXT-bar, 26 inches long — place on the first row of pins below the top clean-out plate boss.

Bottom

position

blue

-tipped HXT-bar, 34 inches long — place on the first row of pins below the bottom cleanout plate boss.

Figure 12

Insert HXT-bars through cleanout openings as shown below (omit the bottom, blue-tipped, HXT-bar in the opening between the front section and the first intermediate section)

12 Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Complete block assembly

(continued)

3.

DO NOT insert a bottom HXT-bar into the opening between the FRONT section and the first intermediate section.

To remove flue HXT-bars when required to clean the boiler flueways, grab the end of each HXT-bar with pliers and pull straight out. Clean HXT-bars and replace as shown in Figure 12, page 12.

Install cleanout plates

1.

2.

3.

4.

5.

Cleanout plates must be installed gas-tight to prevent possibility of flue gas leakage and carbon monoxide emissions, resulting in severe personal injury or death.

See Figure 13.

Position two ¼" x 1¾" carriage bolts in cleanout opening, between the cleanout plate bosses, as shown. Secure with washers and nuts.

Place woven fiberglass gasket over carriage bolts.

Mount cleanout plate over opening. Secure with nuts and washers.

Repeat steps 1 through 3 for remaining cleanout plates.

Install draft hood collar

1.

2.

3.

Install 1

/

8

" continuous bead of sealing rope adhesive in groove on draft hood collar.

Position ½" sealing rope in groove. Overlap ends of rope at least

1 inch.

Mount collar over flueway outlet on back section. Secure with ½ x 1½" hex head cap screws and washers.

Figure 13

Cleanout plate assembly

The boiler contains ceramic fiber and fiberglass materials. Use care when handling these materials per instructions on page 34 of this manual. Failure to comply could result in severe personal injury.

Part No. 550-100-068/0308 13

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Connect water boiler piping

General water piping information

1. System water supply and return piping should be installed and piping connections attached to boiler before erecting jacket or installing controls.

2. Do not pipe in through supply and out through return. This creates reverse water flow through boiler that must not be used.

3. When installing in a system in which return water temperature can drop below 140°F, apply the by-pass piping with by-pass pump as shown in .

Install piping

Install piping as shown in Figure 14, page 14 and Figure 18, page 15

(if applicable) for single boilers. For multiple boilers, see Figure 19, page 15.

Improperly piped systems or undersized piping can contribute to erratic boiler operation and possible boiler or system damage.

1. Connect supply and return piping: a. Size according to tables below.

• For

known flow rates or higher flow rate

(less than 20°F temperature rise) through boiler, see Figure 15.

• For

unknown flow rates

, size piping per Figure 17, page page 15, using 20°F temperature rise through boiler.

Flow at higher rates than shown in the tables in this manual for given pipe sizes can damage the boiler, causing substantial property damage.

b. Locate circulator in supply piping.

c. For return piping, use full diameter pipe for 10 times that diameter before making any reduction. For example, a 4-inch return should not be reduced any closer to boiler return tapping than 40 inches.

d. Install system blow-off (drain) valve in lowest part of return piping close to boiler. ASME minimum size requirements are given in Figure 17, page 15.

2. Install expansion tank: a. b.

Closed type

– connect to 1" tapping "K" (see page 11). Use

1" NPT piping. Any horizontal piping must pitch up toward tank at least 1 inch per each 5 feet of piping.

Diaphragm type

– Refer to tank manufacturer's literature for location. Install automatic air vent in "K" tapping.

c. d.

Connect cold water fill to expansion tank piping. Figure 14 shows typical piping when using a closed type tank. Connect to the same location as the expansion tank connects to the system when using a diaphragm type tank.

Also shown are recommended valves and water meter, when used. Water meter will detect added make-up water, indicating leaks in system.

14

Figure 14

Water boiler piping, typical

Figure 15

Recommended minimum pipe sizes for known flow rates

(note 1)

Water flow rate

GPM

Up to 35

Supply pipe size

A

2"

2½"

Return pipe size

B

2"

2½"

36–50

51–77

78–142

3"

4"

3"

4"

143–237

5"

6"

(note 2)

5"

6"

238–404

Note 1 High temperature rise through boiler is permissible when boiler piping connections are sized per this table.

Intermittent flow at

high velocities may damage any boiler.

Note 2 6-inch piping requires nipples and 5" x 6" reducing couplings

(provided with 1288 through 1888 boilers only). The total pressure drop through the 1888 boiler using the nipple and reducing coupling will not exceed ¼ PSI. For smaller boilers, the pressure drop will be less.

Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Connect water boiler piping

(continued)

Figure 18

By-pass piping for return water less than

140°F

Figure 16

Recommended minimum pipe sizes when flow rate is not known (see Figure 14, page page 14)

(note 1)

Boiler model

Supply pipe size

A

Return pipe size

B

488

588 – 788

888 – 1188

1288 – 1888

6"

3"

4"

5"

(note 2)

6"

3"

4"

5"

(note 2)

Note 1 Pipe sizes are based on a 20°F temperature rise through the boiler. For applications with higher flow rates (lower temperature rise), determine the flow rate and use

Figure 15, page page 14 to size the piping.

Note 2 6-inch piping requires nipples and 5" x 6" reducing couplings (provided with 1288 through 1888 boilers only). The total pressure drop through the 1888 boiler using the nipple and reducing coupling will not exceed ¼ PSI. For smaller boilers, the pressure drop will be less.

Figure 17

ASME drain valve size

Boiler model

488 – 588

688 – 1088

1188 – 1888

Minimum blow-off valve size

1"

1¼"

1½"

Piping multiple boilers

1.

2.

3.

See Figure 18. (Expansion tanks, relief valves and other accessories are required, but omitted from the illustration for simplicity.)

The boiler piping circuits are referred to as the secondary circuits in the following.

The legend for tions follow:

Figure 18 and boiler pump sizing recommenda-

A

Size boiler pump GPM based on the following:

a Temp rise = High limit temp – Return water temp b

c. d. e.

GPM =

Boiler Gross Output, Btuh

Temperature rise x 500

Calculate only secondary (boiler) piping circuit resistance. Allow for head loss through the boiler equal to three 90 degree elbows of secondary pipe size.

Operate each boiler and its pump with a Weil-McLain boiler control panel.

Size secondary (boiler) circuit piping using the flow rate ranges given in Figure 17, page 15.

B

Primary pump GPM and head calculation should not include secondary boiler circuits. Primary pump can operate continuously during heating season.

C

Connection to primary circuit — Space 12" maximum or as close as practical.

D

Check valve.

E

Hand valve.

Part No. 550-100-068/0308

By-pass circulator sizing:

1. Size system circulator as required. Determine GPM and head requirements.

2. Provide a by-pass circulator for EACH boiler. The flow rate for each by-pass circulator will be:

Flow = ¼ x (System circulator GPM) ÷ (# of boilers)

3. All circulators must run at the same time.

4.

5.

Example: For a 1,000,000 Btuh single boiler, with system temperature drop of 20°F:

• System GPM = 1,000,000 ÷ 20 ÷ 500 = 100 GPM

• By-pass GPM = ¼ x 100 GPM = 25 GPM

• Determine by-pass circuit head loss for pipe size and fittings used.

In most applications, a standard booster pump should be adequate.

Figure 19

Multiple water boiler piping

15

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Connect steam boiler piping

General steam piping information:

1.

2.

3.

4.

Hartford loop piping arrangement and wet return are required for steam boilers. Use the Hartford loop for both pumped-return and gravity-return systems.

Maintain 24-inch minimum from waterline to bottom of header (63" from bottom of section).

When using condensate receiver, feed pump must be energized by boiler-mounted pump controller.

Install piping: a. b.

Install piping as shown on ers. See page 19 for additional requirements when piping multiple boilers.

Return pipe sizing.

page 17 through page 18 for single boil-

• Pumped return — Size return piping by pump.

c. d. e.

• Gravity return — Size gravity return same as Hartford loop equalizer pipe size.

Drain valve — Install system drain valve in lowest part of return piping close to boiler. See Figure 17, page 15, for sizing.

Cold water fill piping — Connect cold water fill piping as shown in

Figure 20. Also shown are recommended valves and water meter, if used. Water meter will detect added makeup water, indicating leaks in system.

Condensate return piping:

• Satisfactory operation of any steam heating system depends on adequate return of condensate to maintain steady water level.

Avoid adding excessive amounts of raw make-up water.

Where condensate return is not adequate, a low water cutoff with pump control, condensate receiver, and condensate boiler feed pump should be installed.

• See Figure 21 for piping and Figure 22 for sizing.

Figure 20

Cold water fill piping

Figure 21

Condensate piping to boiler

Figure 22

Condensate receiver capacity required

16

Boiler model number

I=B=R gross output

(lbs steam per hour)

Gallons condensate per hour

Minimum condensate receiver capacity (gallons) (Note 1) Recommended condensate feed pump capacity

15-minute boiler operation

30-minute boiler operation

45-minute boiler operation

60-minute boiler operation

488

488R

588

688

788

888

988

988R

1088

1088R

1188

1288

1388

1488

1588

1688

1688R

1788

1888

810

794

1084

1358

1632

1904

2170

1991

2452

2304

2724

3000

3270

3550

3820

4090

3980

4370

4640

97

95

130

163

195

228

261

239

294

277

327

360

392

426

458

490

478

524

557

29

28

39

49

59

68

78

72

88

83

98

108

117

127

137

147

143

157

167

58

57

78

98

117

137

157

145

176

166

196

216

235

255

274

294

287

314

334

87

85

117

147

176

205

235

217

265

249

294

324

353

383

412

441

430

471

501

234

273

313

289

116

114

156

196

353

332

392

432

470

511

550

588

574

629

668

Note 1 — Maximum time to when condensate returns to boiler — the longer the time for condensate to return, the larger the receiver must be.

GPM at 15 PSI

6.5

7.6

8.7

8.0

3.2

3.1

4.3

5.4

9.8

9.2

10.9

12.0

13.1

14.2

15.3

16.4

15.9

14.5

18.6

Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Connect steam boiler piping

(continued)

Improperly piped systems or undersized piping can contribute to erratic boiler operation and possible boiler or system damage. Piping system must be installed as shown, using pipe sizes shown. Pipe sizes shown are for two-pipe, pumped-return systems. Adjust pipe sizing as needed when connecting to gravity-return systems.

Consult local Weil-McLain distributor or sales office before installing alternate piping.

Steam boiler piping guidelines

Minimum height of header above water line must be 24 inches

The boiler header must always be at least

24 inches

above the water line, as shown in all steam boiler piping diagrams. Installing the pipe lower will result in increased water carryover to the system, resulting in potential serious damage to system components and oxygen corrosion due to excess make-up water.

Hartford loop piping for all steam boilers

1.

2.

You must install the system supply pipe between the equalizer elbow and the last boiler riser pipe connection to the header. This assists in separating water from the steam as it turns upward into the steam supply pipe.

Locate the top of the Hartford loop return nipple at least 4 inches below the water line, as shown.

Figure 23

Model 488 through 688 steam (1 riser)

Figure 24

Model 788 through 1188 steam (2 risers required)

Drawing legend & notes

(Figure 23 through Figure 26)

1

Riser pipes (one for each supply intermediate section)

2

Horizontal pipes needed to offset the header to allow for expansion and contraction of the header

3

Steam supply must be located between last riser connection and equalizer elbow

4

5

6

Equalizer elbow — full size or reducing

Equalizer pipe

Close nipple at Hartford loop tee to reduce water hammer potential

7

8

Condensate return line (gravity or pumped)

Minimum 4 inches between water line and top of Hartford loop return nipple

9

Boiler water line — all automatic water level controls must be set to maintain this level

10

Minimum 24 inches between water line and bottom of header

Part No. 550-100-068/0308 17

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Connect steam boiler piping

(continued)

Figure 25

Model 1288 through 1888 steam (3 or 4 risers required)

18

Drawing legend & notes

(Figure 23 through Figure 26)

4

5

6

7

1

2

3

8

9

10

Riser pipes (one for each supply intermediate section)

Horizontal pipes needed to offset the header to allow for expansion and contraction of the header

Steam supply must be located between last riser connection and equalizer elbow

Equalizer elbow — full size or reducing

Equalizer pipe

Close nipple at Hartford loop tee to reduce water hammer potential

Condensate return line (gravity or pumped)

Minimum 4 inches between water line and top of Hartford loop return nipple

Boiler water line — all automatic water level controls must be set to maintain this level

Minimum 24 inches between water line and bottom of header

Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Connect steam boiler piping

(continued)

Figure 26

Multiple Steam Boiler Piping Gravity Condensate Return

See page 18 for numbered circle references.

A

Pipe as shown for gravity return systems, connecting point

A

to the wet gravity return.

For pumped-return systems, install boiler water level control on each boiler with body mark at level indicated in Figure 42, page 28. Provide at point

A

either:

Separate feed pumps and check valves for each boiler, or . . .

Single feed pump, with separate solenoid valve for each boiler.

B

For pumped-return systems, install a combination float and thermostatic trap on each boiler to prevent flooding of one boiler while other boiler is firing.

Install trap in skim tapping (see Figure 39, page 27).

Connect traps to condensate receiver.

Gravity-return systems are self-levelling if the wet returns are piped to the common system wet return.

C

Install boiler piping as shown in the preceding pages of this manual.

Part No. 550-100-068/0308

D

Install stop valves per ASME code requirements.

• For pump-return systems, if using automatic steam valves, use only slow-opening automatic valves. Use a Weil-McLain Boiler Control System (such as a BCP panel) to open each steam valve automatically before firing burner.

E

Construct common supply drop header with pipe size at least same size as largest boiler header size.

F

Use:

• A Weil-McLain Boiler Control System (such as a BCP panel) with header-mounted pressure control(s) to sequence boilers, or . . .

• A steam pressure controller.

G

Install drip line in common supply drop header.

Gravity-return: Pipe drip line to wet return.

Pumped-return: Use combination float and thermostatic trap and drain to condensate receiver.

19

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Install jacket

Before installing jacket

1.

2.

3.

The boiler contains ceramic fiber and fiberglass materials.

Use care when handling these materials per instructions on page 34 of this manual. Failure to comply could result in severe personal injury.

These parts

must be on boiler

: a. b. c. d. e. f.

Plugs for unused tappings

Supply and return piping and steam supply header

Cleanout plates

Tankless heaters (when used), tankless heater cover plates

(when used), tankless heater piping (when used)

Flue damper assembly

Observation port assemblies

These parts

may be on boiler

: a. Burner mounting plate and burner a. b. c. d.

These parts

must be off boiler

:

Water or steam gauge

Limit control and low water cutoff

Gauge glass and gauge glass cocks, tri-cocks

Drain cock

Remove jacket parts from cartons

1.

2.

3.

Locate jacket cartons.

Remove jacket parts from cartons as needed. Leave in cartons as long as possible to avoid damage.

Jacket parts are in the boxes listed below:

Part

Jacket screws (in jacket corner boxes)

Jacket support brackets & hex nuts

Jacket side support channels, upper & lower

Jacket front/rear support channels, upper & lower

Jacket front panel

Jacket back panel

Jacket side and top panels

Jacket corners

Jacket trim

Box label descriptions

included in

CRNR

boxes

BKT

included in

TRM/CHNL

boxes

COM

PNL-F

PNL-B

L / R / T

CRNR

TRM/CHNL

Install support brackets/channels

1.

2.

Place upper and lower support brackets over draw rods as shown in Figure 29, page 21. Place the brackets on the sections as given in

Figure 27. Sections are numbered from front to back.

Fasten each bracket loosely using two 5/8" nuts screwed onto the ends of the tie rods as shown.

Models 488 through 988 do not require lower support brackets. Only upper brackets are required.

Fasten all nuts and screws loosely during assembly to allow adjustment after all jacket frame parts are installed.

20

Boiler

1088

1188

1288

1388

1488

1588

1688

1788

1888

488

588

688

788

888

988

Figure 27

Place support brackets as listed below

Upper brackets on sections:

2, 3

2, 4

2, 5

2, 6

3, 6

2, 5, 8

3, 6, 9

3, 6, 9

3, 7, 10

3, 7, 11

3, 7, 10, 13

2, 5, 8, 11, 14

2, 5, 9, 12, 15

2, 5, 9, 13, 16

2, 6, 10, 14, 17

Lower brackets on sections:

None

None

None

None

None

None

9

9

7

8

7

7

6

6

10

3. Attach the upper channels to the upper supports as shown in callouts , and , Figure 29, page 21.

Use two #10 x ½" screws at each bracket. Models

988 and larger have two-piece channels.

The side channels are labelled channel parts for each model.

A

and

B

in Figure 29. Figure 28 gives the lengths of the side

The channels at the boiler front and rear are part numbers 426400030 & 426400031, respectively.

488

588

688

788

888

988

1088

1188

1288

1388

1488

1588

1688

1788

1888

Figure 28

Upper and lower side channel lengths

Boiler

35

51

59

67

67

43

43

51

51

71

Upper channel lengths

(inches)

A

30

38

46

54

62

B

NA

NA

NA

NA

NA

35

59

59

59

67

35

43

43

51

71

66

48

56

64

64

40

40

48

48

72

Lower channel lengths

(inches)

A

26

34

42

50

58

B

NA

NA

NA

NA

NA

NA

58

58

58

66

34

42

42

50

66

4.

5.

Attach the four jacket corners to the upper channels as shown in callout , Figure 29, page 21. Corner part numbers are: 426400054 (front left), 055 (front right), 056 (back left), and 057 (back right).

Attach the lower side, front and rear channels to the jacket corners as shown in callouts and

of Figure 29, page 21. Models 1088 and larger have two-piece side channels. The channels are labelled

A

and

B

in Figure 29. Figure 28 gives the lengths of these parts for each model. Front and rear lower channels are part numbers 426400032 and 426400033.

Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Install jacket

(continued)

Figure 29

Installing jacket support brackets, support channels and corners

(piping and other components omitted for clarity)

Part No. 550-100-068/0308 21

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Install jacket

(continued)

Install jacket front and back panels

1.

2.

Slide the jacket front and back panels down over the top channels and into the bottom channels as shown in Figure 30.

Slide the upper and lower channels as needed to square up the fit.

Install jacket side panels

1.

2.

3.

Remove jacket side panels from cartons.

Before installing side panels, square up the jacket support rails.

Place any of the jacket side panels on the rails as shown in

Figure 30.

Butt the side panel against the jacket corner panel.

Push/pull on the upper and lower channels until the fit-up of the side panel, corner panel and channels is square.

Place a jacket top panel in position against the jacket front panel to ensure the top alignment is square. Adjust the jacket support rails forward or backward if needed for square alignment.

Tighten the 5/8-inch nuts on the upper (and lower) support brackets.

Tighten the screws securing the upper and lower rails to the support brackets.

Tighten the screws securing the front and back panels to the rails.

Apply all jacket side panels in the order shown in Figure 32.

Remove jacket knockouts as required for tankless heaters and tankless heater openings.

Note that panel sequence is not important for boilers not equipped with tankless heater intermediate sections.

Install jacket top panels

1. Place jacket top panels as shown in Figure 33, page 24.

• Remove knockouts for riser pipes and air bleed piping (front section) using tin snips.

Install jacket trim

2. Press jacket trim down over the front and side jacket panels as shown in Figure 31.

Figure 30

Installing (removing) jacket front, rear and side panels

Figure 31

Press jacket trim down over jacket front, rear and side panels

22 Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Install jacket

(continued)

Figure 32

Jacket side panel placement

Part No. 550-100-068/0308 23

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Install jacket

(continued)

Figure 33

Jacket top panel placement

24 Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Pipe tankless heaters

Hot water can scald!

Consumer Product Safety Commission and some states recommend domestic hot water temperature of 130°F or less.

When installing an automatic mixing valve, selection and installation

must

comply with valve manufacturer's recommendations and instructions.

Water heated to a temperature suitable for clothes washing, dish washing and other sanitizing needs will scald and cause injury.

Children, elderly, infirm or physically handicapped persons are more likely to be injured by hot water. Never leave them unattended in or near a bathtub, shower or sink. Never allow small children to use a hot water faucet or draw their own bath. If anyone using hot water in the building fits this description, or if state laws or local codes require certain water temperatures at hot water faucets, take special precautions:

— Install automatic mixing valve set according to those standards.

— Use lowest practical temperature setting.

— Check water temperature immediately after first heating cycle and after any adjustment.

To pipe tankless heaters:

1.

2.

3.

4.

5.

6.

7.

See Figure 35.

Size piping no smaller than heater inlet and outlet.

Automatic mixing valve must be installed. See

Figure 35. Follow manufacturer's instructions to install.

Flow regulating valve must be installed. Size according to continuous draw of heater. See Figure 34.

Follow manufacturer's instructions to install.

Operating control with small adjustable differential scale is recommended. Install in temperature control tapping in heater plate.

Multiple tankless heaters (see Figure 35): a. b. c.

Use cold water supply header with individual risers to each heater. Size header by increasing one pipe size for each additional heater.

Use hot water outlet header with individual risers to each heater. Size header by increasing one pipe size for each additional heater.

Do not pipe multiple heaters in series.

In hard water areas, soften cold domestic water supply to heaters to prevent lime build-up.

Figure 34

Tankless heater ratings (Weil-McLain ratings)

Heater number

820

Note 1

Note 2

Intermittent draw – GPM

(note 2)

8.5

Continuous draw GPM

(notes 1, 2)

6.5

Inlet and outlet tappings

¾"

GPM based on 40–140°F DHW with boiler water at 200°F

Based on continuous draw with no recovery period

Figure 35

Tankless Heater Piping

Part No. 550-100-068/0308 25

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Install water boiler controls

Install controls:

1. Install furnished controls per Figure 36 and Figure 37.

Failure to properly install, pipe and wire boiler controls can result in severe damage to boiler, building and personnel; and is not covered by boiler warranty.

2. Relief valve must be installed with spindle in vertical position. Use fittings provided with boiler. Do not make any other connection in that piping.

Relief valve discharge line must be piped using rigid material suitable for 375°F, threaded one end, near floor close to drain to eliminate potential of severe burns. Do not pipe to any area where freezing could occur. Do not plug, valve or place any obstruction in discharge line.

3. When installing low water cut-off a. b. c.

Must be installed if boiler is located above radiation level.

May be required on water boilers by certain state, local or territorial codes or insurance companies.

Install low water cutoff designed for water installations where shown in Figure 36 and Figure 37.

4. If installation is to comply with ASME installation requirements, an additional high temperature limit is needed. Purchase and install in supply line between boiler and isolation valve or in tapping "

A

."

5. Dual limit control settings:

a b

Low

– set according to design requirements.

High

– at least 20° higher than low limit, 240°F maximum.

6. Install optional controls per control manufacturer's instructions.

Figure 37

Water control locations

Figure 36

Water control tappings (see Figure 37)

26

Location

A

B

L

C1 & C2

C1

D1 & D2

Size

2"

2"

1"

1"

1"

E1 & E2

F1 & F2

G

H

K

½"

C\,

¾"

¾"

1"

"

Function

High limit

Manual reset limit

Water relief valve

Not used — plug

Alternate low water cut-offs

Combination high and low limit control

Firing rate temperature control (when used)

Low water cut-offs

Combination pressure–temperature gauge

Boiler drain

Piping to compression tank or automatic air vent

Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Install steam boiler controls

Install controls:

1. Install controls where shown in Figure 38 and Figure 39.

a. b.

Failure to properly install, pipe and wire boiler controls can result in severe damage to boiler, building and personnel; and is not covered by boiler warranty.

Install steam pressure operating and high limit controls and pressure gauge. See Figure 38, Figure 39 and Figure 40, page 28.

Pressure limit control settings:

• Low

– set according to design requirements.

• High

– set at least 2 psi higher than low limit, 15 psi maximum.

Relief valve must be installed with spindle in vertical position.

Use fittings provided with boiler. Do not make any other connection in that piping.

c.

Pipe relief valve discharge through vertical piping to atmosphere. Use rigid material suitable for 375°F, threaded one end only. Install drain pan elbow to drain condensate.

Pipe near floor close to floor drain to eliminate potential of severe burns. Do not pipe to any area where freezing could occur. Do not plug, valve or place any obstruction in discharge line.

Install water level controls and gauge glass per

Figure 39 and Figure 42, page 28.

Figure 38,

• Fittings for controls to be furnished by others.

• If water level control is not shown in Figure 41, page 28, locate casting mark on control and install per manufacturer's instructions.

Do not use water level controls with quick hook-up fittings. Nuisance shutdowns will occur.

Figure 39

Steam control locations

Figure 38

Steam control tappings (see Figure 39)

Location

A

B

L

C1 & C2

C1

D1 & D2

E1 & E2

F1 & F2

G

Size

2"

2"

1"

1"

1"

½"

C\,

"

¾"

H

K

¾"

1"

Function

Steam relief valve and/or

Skim tapping

Steam relief valve

Secondary probe low water cut-off

Low water cut-offs (see Figure 42, page 28)

Alternate low water cut-offs (see Figure 42, page 28)

Gauge glass

Try cock tappings

Pressure limit control,

Pressure operating control and pressure gauge,

Firing rate pressure control (when used)

Boiler drain (see Figure 17, page page 15, for system blow-off (drain) valve locations and sizes

Part No. 550-100-068/0308 27

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Install steam boiler controls

(continued)

Figure 40

Steam control siphon and fittings

Figure 41

Float-type water level control locations

Primary water level control

Casting line height above bottom of gauge glass

Back-up water level control

Casting line height above bottom of gauge glass

Note 1

61, 63

150MD, 157MD

(see Note 3)

93, 193, 94

(see Note 3)

2"

2C\,"

2C\,"

2"

2"

"A"

¼"

1½"

2C\,"

2"

2"

Notes 1, 2

None

61, 63

None

150

61, 63

51-2 & 51-S-2

None

93, 193, 94

61, 63

51-2 & 51-S-2

51-2 & 51-S-2

(see Note 3)

1"to 1¼"

None

Notes:

1.

2.

3.

Other manufacturer's controls providing similar function may be used, if properly located and selected.

Use low water cut-off function only. Pump controller function must only be handled by the primary control.

When pump control is used with feedwater tank, install pump control on boiler and make-up water feeder on tank. Use separate low water cutoff on boiler when backup is needed. Do not install combination low water cutoff and feeder as back-up control on boiler. Feeder will operate before pump control operates.

¼"

¼"

¼"

¼"

"B"

½"

¼"

¼"

Figure 42

Water level control locations (see Figure 41)

28 Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Connect breeching and venting systems

General venting information

1. Model 88 boilers operate with positive overfire pressure. Adjust damper assembly (see Figure 49, page 33) during burner start-up to achieve 0.1" W.C. positive pressure at damper sample hole.

Select type of venting system

Forced draft

• Boiler, breeching and stub vent operate at positive pressure. Entire system must be gas-tight to prevent leaks. Stub vent height must be limited to prevent negative draft with 3-foot minimum stub vent height above roof. See Figure 44 and Figure 46.

Balanced draft

• Boiler operates with positive pressure overfire. Chimney

may

provide excess draft which may require a barometric draft control installed and set to provide minimum draft to maintain 0.1" positive pressure at flue collar. Minimum chimney height above roof is 3 feet. See Figure 45 and Figure 47.

Construct metal breeching:

1.

2.

See Figure 43 for minimum breeching diameter.

Select material type and thickness in compliance with local codes.

Conventional flue pipe should not be used as it could leak flue gases and carbon monoxide emissions through seams and joints, resulting in severe personal injury or death.

3. Refer to ASHRAE Guide for chimney and breeching calculations and construction and lining.

Long horizontal breechings, excessive number of tees and elbows or other obstructions restricting combustion gas flow can result in possibility of condensation, flue gas leakage and carbon monoxide emissions, causing severe personal injury or death.

888

988

1088

1188

1288

1388

1488

1588

1688

1788

1888

488

588

688

788

Figure 43

Minimum breeching diameter

Boiler model

I=B=R vent or liner diameter

(inches)

Forced draft

Balanced draft

Boiler flue collar dimensions

(inches)

16

16

18

14

16

12

12

14

14

10

10

18

20

18

18

21

24

24

21

21

15

18

18

18

12

15

24

27

24

24

14 round

14 round

14 round

14 round

16 round

10 round

10 round

10 round

12 round

12 round

14 round

16 round

16 round

16Z\, x 19M\, oval

16Z\, x 19M\, oval

Part No. 550-100-068/0308 29

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Connect breeching and venting systems

Figure 44

Stub vent – forced draft — single boiler

Figure 46

Stub vent – forced draft — multiple boilers

Figure 45

Conventional chimney – balanced draft with barometric draft control when required — single boiler

Figure 47

Conventional chimney – balanced draft with barometric draft control when required — multiple boilers

30 Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Install burner & wiring and fill system

To install burner

1.

2.

3.

Unpack burner.

Place gasket around air tube and against burner mounting flange.

If sealing rope is used, apply 1

/

8

" continuous bead of rope adhesive around burner mounting flange and apply sealing rope to make gas-tight seal.

Mount burner into opening in burner mounting plate.

4.

5.

6.

Maintain gas-tight seal between burner mounting flange and plate to prevent damage to air tube.

Level burner using burner support brackets where required.

Secure with furnished bolts.

Retain burner information packet. Keep with boiler.

To wire burner and boiler controls

1.

2.

3.

4.

Electric shock hazard. Can cause severe personal injury or death if power source is not disconnected before installing or servicing boiler and burner.

Install all wiring in compliance with:

National Electrical Code ANSI/NFPA 70.

Any additional national, state, or local codes.

Follow burner manual and wiring diagram found in burner information packet.

Use #14 AWG wire for operating and safety circuit wiring.

Where burner motor voltage differs from control voltage, supply proper voltage to each. Size fused disconnects and conductors per

National Electrical Code ANSI/NFPA 70.

Determine if water treatment is needed

(water boilers only)

Do not use petroleum-based cleaning or sealing compounds in boiler system. Severe damage to system components can result, causing substantial property damage.

Continual make-up water will reduce boiler life. Minerals can build up in sections, reducing heat transfer, overheating cast iron and causing section failure.

For unusually hard water areas or low pH conditions

(less than 7.0) consult local water treatment company.

Provide a water softener for make-up water if hardness exceeds 7 grains.

Freeze protection (when used)

(water boilers only)

1. Use antifreeze especially made for hydronic systems.

Inhibited propylene glycol is recommended.

Do not use automotive, ethylene glycol or undiluted antifreeze. Severe personal injury or death can result.

2. 50% solution provides protection to about -30°F.

3. Local codes may require back-flow preventer or actual disconnect from city water supply.

4. Determine quantity according to system water content. Boiler water content is listed in "Ratings," page 35. Percent of solution will affect sizing of heat distribution units, circulator and expansion tank.

5. Follow antifreeze manufacturer's instructions.

To fill water boilers

1. Close manual air vents and drain cocks.

2. Fill to correct system pressure. Correct pressure will vary with each installation.

3.

4.

Starting on lowest floor, open air vents one at a time until water squirts out. Close vent. Repeat with remaining vents.

Refill boiler to correct pressure.

To fill steam boilers

1. Do not fill (except for leakage test) until boiler is ready to be fired.

2.

3.

Fill to normal waterline, halfway up gauge glass.

Recommend boiler water pH 7.0 to 8.5.

Part No. 550-100-068/0308 31

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Install fuel piping

Gas piping

1.

2.

3.

4.

5.

6.

7.

8.

In sizing the gas piping, the following factors should be considered: a. b. c. d.

Diameter and length of the gas supply piping.

Number of fittings.

Maximum gas consumption (including any possible future expansion).

Allowable loss in gas pressure from the gas meter outlet to the boiler.

Minimum inlet natural gas pressure required at manual main shutoff valve — see the burner manual and material list.

Follow good piping practices.

Pipe joint compound (pipe dope) must be resistant to the corrosive action of liquefied petroleum gases and applied sparingly only to the male threads of pipe joints.

A ground joint union must be installed in the piping to provide for servicing. The supply piping must include a manual shut-off valve and sediment trap. See Figure 48.

Piping must be supported by hangers, not by the burner or its accessories.

Purge all air from the supply piping.

All gas piping must be tested for leaks after installation. Use soap suds mixture only.

Fuel oil piping

To prevent oil flow in case of oil line breakage:

• Use anti-syphon device when any part of the oil tank is above burner level.

• Use check valve in suction line on burner side of manual shut-off valve nearest tank when top of fuel oil tank is below burner level.

1.

2.

3.

4.

Failure to comply could result in fuel leakage or fire, causing potential severe personal injury, death or substantial property damage.

A two-pipe fuel oil piping system is required for all installations.

Supply and return lines must enter tank from top, extending to within 4 to 6 inches from bottom of tank.

Use oil filter sized for fuel pump suction gear capacity.

Install oil filter.

Do not install filter outside or close to an outside wall.

5.

6.

Use continuous copper tubing to reduce possible piping leaks and to ensure reliable seal when oil piping is buried.

Use flare fittings, not compression fittings.

Fire hazard

— DO NOT USE soldered fittings. No safe repair can be made.

Figure 48

Gas supply piping

7. Follow good piping practices.

8. Pipe joint compound (pipe dope) must be resistant to corrosive action of fuel oil. Apply sparingly only to male threads of pipe joints.

9. Supply and return piping should be sized to design conditions, but not less than ½" O.D. continuous copper tubing.

10. Auxiliary fuel oil pump is recommended when suction line lift exceeds 12 feet.

11. Install swing joints so they will tighten as buried tank settles to prevent fuel line breakage.

12. Where iron pipe is required by local codes, make swing joints with nipples and elbows several inches long on both suction and return line. Locate close to tank.

13. Install manual shut-off valve in suction line piping near burner and where piping enters building from outside tank.

14. Pitch suction line piping toward fuel tank.

15. Provide tee and plug at highest point in suction line to release air from suction line and aid in priming.

32 Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Make final adjustments

Adjust burner and damper assembly:

1. Lock flue damper OPEN ( Figure 49).

2.

3.

4.

Make final burner adjustments using combustion test equipment to assure proper operation. Do not fire boiler without water. Sections will overheat, damaging boiler and resulting in severe property damage.

Refer to burner manual for start-up and service.

Let burner advance to high fire. Heat boiler to design conditions.

Using combustion test equipment, adjust burner for: a. b. c.

12% (± ¼%) CO

2

for No. 2 fuel oil, 0 smoke.

9 – 10% CO

2

natural gas; CO in flue gas not to exceed 50 ppm

(0.01%).

Flue gas temperature no lower than 330°F

5.

6.

7.

8.

9.

On some applications, if draft conditions or burner characteristics cause the burner flame pattern to impinge on the combustion chamber wall, you may notice pinging sounds from the boiler. Adjust the burner if possible to redirect the flame. If this does not work, contact your boiler supplier or Weil-McLain to obtain an optional combustion chamber kit (see page 38 for contents).

Adjust flue collar damper ( Figure 49) to ensure 0.1" W.C. positive pressure at test opening.

Tighten screws to secure in position.

Plug test opening with 1/8" plug provided with flue collar/damper assembly.

Adjust barometric draft control, when used, to design conditions.

Repeat steps 4 through 6. Adjust as required.

Skim steam boilers:

Clean all newly installed steam boilers to remove oil.

Failure to properly clean can result in violent water level fluctuations, water passing into steam mains, or high maintenance costs on strainers, traps and vents. Skim boiler only. Do not clean old piping or leaks can occur.

1.

2.

3.

4.

5.

6.

7.

Do not use petroleum-based cleaning or sealing compounds in boiler system. Severe damage to system components can result, causing substantial property damage.

Remove 2" plug from skim tapping tapping " ure 38, page 27).

A

" (see Fig-

Provide 2" skim piping from tapping to floor drain.

Raise waterline to midpoint of skim piping.

Fire burner to maintain temperature below steaming rate during skimming process.

Feed in water to maintain water level.

Cycle burner ON/OFF as needed to prevent rise in steam pressure.

Continue skimming until discharge is clear. This may take several hours.

Part No. 550-100-068/0308

Figure 49

Flue collar/damper assembly

8.

9.

Drain boiler.

While boiler is warm,

but not hot

, flush all interior surfaces under full pressure until drain water runs clear.

10. Remove skim piping.

11. Re-insert plug at boiler skim tapping.

12. Close drain cock.

13. Fill with fresh water to normal water line.

14. Start burner and steam for 15 minutes to remove dissolved gases.

15. Stop burner.

16. Check traps and air vents for proper operation.

Check boiler for gas-tight seal:

Boiler must be sealed gas-tight to prevent possible flue gas leakage and carbon monoxide emissions, resulting in severe personal injury or death.

1. Remove boiler jacket side and top panels.

The boiler contains ceramic fiber and fiberglass materials. Use care when handling these materials per instructions on

page 38 of this manual. Failure to comply could result in severe personal injury.

2.

3.

4.

Start burner. Observe all sealing points and chalk mark any not gas-tight.

To seal all chalk-marked areas: a. b.

Use silicone sealant on section flueways.

Check gaskets and sealing rope placement.

Reinstall all jacket panels.

33

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Handling ceramic fiber and fiberglass materials

34

REMOVAL OF FRONT PLATE OR CLEANOUT PLATE MATERIALS

The burner front plate and cleanout plate gaskets contain ceramic fiber materials. Ceramic fibers can be converted to cristobalite in very high temperature applications. The International Agency for Research on Cancer (IARC) has concluded, "Crystalline silica inhaled in the form of quartz or cristobalite from occupational sources is carcinogenic to humans (Group 1).":

■ Avoid breathing dust and contact with skin and eyes.

• Use NIOSH certified dust respirator (N95). This type of respirator is based on the OSHA requirements for cristobalite at the time this document was written. Other types of respirators may be needed depending on the job site conditions. Current NIOSH recommendations can be found on the NIOSH web site at http://www.cdc.gov/niosh/homepage.html. NIOSH approved respirators, manufacturers, and phone numbers are also listed on this web site.

• Wear long-sleeved, loose fitting clothing, gloves, and eye protection.

■ Apply enough water to the combustion chamber lining or base insulation to prevent airborne dust.

■ Remove combustion chamber lining or base insulation from the boiler and place it in a plastic bag for disposal.

■ Wash potentially contaminated clothes separately from other clothing. Rinse clothes washer thoroughly.

NIOSH stated First Aid.

■ Eye: Irrigate immediately.

■ Breathing: Fresh air.

REMOVAL OR INSTALLATION OF FIBERGLASS WOOL:

This product contains fiberglass jacket insulation and ceramic fiber materials in jacket insulation, burner front plate insulation and cleanout plate gaskets. Airborne fibers from these materials have been listed by the State of California as a possible cause of cancer through inhalation.

■ Avoid breathing dust and contact with skin and eyes.

• Use NIOSH certified dust respirator (N95). This type of respirator is based on the OSHA requirements for fiberglass wool at the time this document was written. Other types of respirators may be needed depending on the job site conditions. Current NIOSH recommendations can be found on the NIOSH web site at http://www.cdc.gov/niosh/homepage.html. NIOSH approved respirators, manufacturers, and phone numbers are also listed on this web site.

• Wear long-sleeved, loose fitting clothing, gloves, and eye protection.

■ Operations such as sawing, blowing, tear out, and spraying may generate airborne fiber concentration requiring additional protection.

■ Wash potentially contaminated clothes separately from other clothing. Rinse clothes washer thoroughly.

NIOSH stated First Aid.

■ Eye: Irrigate immediately.

■ Breathing: Fresh air.

Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Ratings

Boiler model number

Notes:

1, 10

I=B=R burner capacity

Light oil

GPH

2, 3

Gas

MBH

2, 4

488R

6.9

996

488

588

688

Gross

I=B=R output

Net I=B=R ratings

MBH Steam

Sq. Ft

5, 6 8

Steam

MBH

8

Water

MBH

8

Boiler

H.P.

Combustion efficiency

Oil

Thermal efficiency

Net firebox volume

Gas Oil Gas Cubic feet

— — — —

827 2,583 620

7.0

1,010 839 2,621 629

9.4

1,356 1,126 3,521 845

719

730

979

24.7

25.1

33.6

87.5

87.5

87.0

84.8

84.8

84.4

85.6

85.6

85.6

83.1

83.1

83.1

11.02

11.02

14.45

11.8

1,701 1,413 4,469 1,072 1,229 42.2

86.7

84.1

85.6

83.1

18.08

788

888

14.2

2,046 1,700 5,463 1,311 1,478 50.8

86.5

83.9

85.6

83.1

21.61

16.6

2,382 1,987 6,427 1,543 1,728 59.4

86.3

83.7

85.6

83.1

25.14

988R

17.2

2,482 2,062 6,671 1,601 1,793 61.6

86.2

83.7

85.6

83.1

28.67

988

18.8

2,737 2,274 7,358 1,766 1,977 67.9

86.2

83.7

85.6

83.1

28.67

1088R

20.0

2,887 2,399 7,763 1,863 2,086 71.7

86.2

83.6

85.6

83.1

32.20

1088

21.5

3,082 2,561 8,283 1,988 2,227 76.5

86.2

83.6

85.6

83.1

32.20

1188

23.5

3,428 2,848 9,213 2,211 2,477 85.1

86.1

83.5

85.7

83.1

35.76

1288

26.0

3,773 3,135 10,147 2,434 2,726 93.7

86.0

83.5

85.7

83.1

39.26

1388

28.5

4,119 3,422 11,071 2,657 2,976 102.2

86.0

84.4

85.7

83.1

42.79

1488

31.0

4,464 3,709 12,000 2,880 3,225 110.8

86.0

83.4

85.7

83.1

46.32

1588

33.0

4,809 3,996 12,925 3,102 3,475 119.4

85.9

83.3

85.7

83.1

49.85

1688R

34.5

4,979 4,137 13,383 3,212 3,597 123.6

85.9

83.3

85.7

83.1

53.38

1688

35.5

5,155 4,283 13,854 3,325 3,724 127.9

85.9

83.3

85.7

83.1

53.38

1788

38.0

5,494 4,570 14,783 3,548 3,974 136.5

85.9

83.3

85.7

83.1

56.91

1888

40.5

5,845 4,857 15,713 3,771 4,123 145.1

85.9

83.3

85.7

83.1

60.44

Flue gas volume

CFM

7

1,184

1,101

1,299

1,443

1,588

1,735

1,854

2,003

1,945

2,152

2,303

772

906

1,031

954

376

370

507

639

Positive pressure in firebox

Flue outlet diameter

Boiler water content

Packaged boiler weight

Inches Gallons Pounds Inches

W.C.

9 — — —

0.60

0.60

0.63

0.65

0.67

0.69

0.70

0.70

0.71

0.71

0.72

0.73

0.74

0.75

0.76

0.77

0.78

0.79

0.80

14

16

16

14

14

14

14

16

16

18 *

18 *

14

14

12

12

10

10

10

10

316

339

362

247

247

270

293

385

385

408

431

178

201

224

224

109

109

132

155

6130

6130

6695

7260

7890

8410

9005

9525

9525

9780

10775

4345

4925

5600

5600

2860

2860

3340

3820

1. See below to specify complete model number.

2.

3.

4.

Burner input based on maximum of 2,000 feet altitude. For other altitudes, consult Weil-McLain distributor/agent or sales office.

No. 2 fuel oil — Commercial Standard Spec CS75-56. Heating value of oil = 140,000 Btu per gallon.

Gas pressure required at burner gas train inlet for rated burner input; based on 1,000 Btu per cubic foot natural gas, specific gravity of 0.60. Refer to burner manual for required pressure.

5. Gross I=B=R ratings have been determined under the I=B=R provision governing forced draft boiler-burner units.

6. Based on average water temperature of 170°F in heat distributing units.

7. Flue gas volume at outlet temperature.

8. Net I=B=R ratings are based on net installed radiation of sufficient quantity for the requirements of the building.

Nothing need be added for normal piping and pick-up.

Water ratings are based on a piping and pick-up allowance of 1.15.

Steam ratings are based on the following allowances: 488 – 588 =

1.333; 688 = 1.323; 788 = 1.301; 888 = 1.289; 988 – 1888 = 1.288.

An additional allowance should be made for gravity hot water systems or for unusual piping and pick-up loads.

Consult local Weil-McLain distributor/agent or sales office.

9. With 0.10" W.C. positive pressure at flue collar.

10. Water boilers tested for 80 PSIG, ASME water working pressure.

Steam boilers tested for 15 PSIG, ASME steam working pressure.

* Flue collar connection is oval, 16

Z\,

" x 19

M\,

"

Part No. 550-100-068/0308 35

Model

1088

1188

1288

1388

1488

1588

1688

1788

1888

488

588

688

788

888

988

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Dimensions

B

39 ½

47 ½

55 ½

63 ½

47 ½

31 ½

39 ½

A

87

95

103

111

119

127

135

55

63

71

79

23

31

39

47

Dimensions (inches)

C

79 ½

87 ½

D

14

14

16

16

16

12

14

14

14

10

10

10

12

16

Z\,

" x 19

M\,

" oval

E

52 ¾

52 ¾

51 ¾

51 ¾

51 ¾

51 ¾

51 ¾

53 ¾

52 ¾

52 ¾

52 ¾

54 ¾

54 ¾

54 ¾

53 ¾

L

98 ¾

106 ¾

114 ¾

122 ¾

130 ¾

138 ¾

146 ¾

66 ¾

74 ¾

82 ¾

90 ¾

34 ¾

42 ¾

50 ¾

58 ¾

W

94

102

110

118

126

134

142

62

70

78

86

30

38

46

54

H

71 C\,

79 C\,

87 C\,

95 C\,

103 C\,

111 C\,

119 C\,

127 C\,

135 C\,

23 C\,

31 C\,

39 C\,

47 C\,

55 C\,

63 C\,

36

488R

488

588

688

788

888

988R

988

1088R

1088

1188

1288

1388

1488

1588

1688R

1688

1788

1888

Model Supply & return tappings

Supply tappings (No. & size) Return tappings (No. & size)

Water Steam

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

Steam

2 – 5"

2 – 5"

2 – 5"

2 – 5"

3 – 5"

3 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

2 – 5"

3 – 5"

3 – 5"

3 – 5"

3 – 5"

4 – 5"

4 – 5"

Water

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

1 – 6"

26

26

26

26

26

26

21

21

21

21

21

21

21

26

Carlin

Burner lengths (Dimension F)

Riello Power-

Flame

Beckett

Oil

Beckett

Gas

49

49

49

49

49

49

33

33

33

33

33

49

49

49

49

56

49

49

49

39

39

39

34

34

34

31

31

31

34

34

34

34

39

44

44

39

39

39

23

23

23

22

22

22

21

21

21

22

22

22

22

30

30

30

30

30

30

29

30

30

30

30

30

30

30

Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Dimensions

(continued)

Figure 50

Dimensions (see lettered dimensions on opposite page)

Part No. 550-100-068/0308 37

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Parts

38

24

25

22

23

20

21

17

19

28

29

26

27

30

Item Description

5

6 & 13

7

3

4

1

2

10

11

8

9

12

14

15

16 & 18

Not shown

Front sections (8823)

Regular intermediate section (8825)

Tankless intermediate section (8826)

Back section (8828)

Supply intermediate section (8824) (not shown)

Section replacement kit (includes rope seals, rope adhesive and sealant for one joint)

Burner mounting plate

Sealing rope — ½" (13 feet per joint, 7 feet for burner plate, 6 feet for flue collar)

Tankless heater, when used, number 820

Heater gasket

Heater cover plate

Draw rod 5/8"-11UNC-2A x 13" (apply to front and rear sections)

Draw rod 5/8"-11UNC-2A x 11" (apply between intermediate sections)

Draft hood collar assembly

(includes damper collar, damper, damper quadrant, locking plate, swivel, brackets and rope) a. 10-inch — 488 through 688 . . . . . . . . . . . . . . . . . . . . . b. c. d. e.

12-inch — 788 and 888 . . . . . . . . . . . . . . . . . . . . . . .

14-inch — 988 through 1388 . . . . . . . . . . . . . . . . . . . .

16-inch — 1488 through 1688 . . . . . . . . . . . . . . . . . . .

18-inch — 1788 and 1888 . . . . . . . . . . . . . . . . . . . . . f. g. h.

Quadrant for flue collar . . . . . . . . . . . . . . . . . . . . . . .

Damper blade . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Damper locking plate . . . . . . . . . . . . . . . . . . . . . . . .

Cleanout plate

Woven fiberglass gasket for cleanout plate

Observation port assembly (includes frame, rope, gasket, plugs and sight glass) a. Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

b. c.

Sight glass only . . . . . . . . . . . . . . . . . . . . . . . . . . .

Washer gasket for sight glass (2

Z\,

x 1

Z\v

x

Z\,

inches) . . . . . . . .

Sealing rope, C\," (1 foot per observation port)

Burner mounting plate studs (½ x 3½ inches)

Cleanout plate nut, ¼"

Cap screw, ½–13 x ¾"

Observation port screw, 10–32 x 1½"

Flue collar cap screw, ½" x 1½"

Flue collar washer, ZZ\zn"

Burner mounting plate washer, ½"

Burner mounting plate nut, ½"

Draw rod nut, B\,"

Cleanout plate washer, ¼"

Cleanout plate carriage bolt, ¼" x 1¾"

HXT-bars (see Figure 12, page 12, for installation and placement details for HXT-bars) d. 3-flueway kit (includes 3 sets of bars) e. 2-flueway kit (includes 2 sets of bars)

Combustion chamber liner kit (optional) — includes ceramic fiber blanket for left side wall plus water glass adhesive — see page 33. Consult your local Weil-McLain sales office for details.

Part number

316-301-210

316-301-212

316-301-214

316-301-211

316-301-213

386-300-213

Order for specific burner

590-735-140

590-291-909

590-317-579

450-030-934

560-134-505

560-134-495

340-004-606

340-004-607

340-004-608

340-004-609

340-004-612

330-056-634

460-003-646

563-530-784

450-030-965

590-317-305

383-600-099

591-419-199

590-317-580

590-317-150

Obtain locally

Obtain locally

Obtain locally

Obtain locally

Obtain locally

Obtain locally

Obtain locally

Obtain locally

Obtain locally

Obtain locally

Obtain locally

416-400-130

416-400-131

Contact local Weil-McLain sales office

Part No. 550-100-068/0308

Boiler manual: • Installation • Start-Up • Maintenance • Parts

Parts

(continued)

Figure 51

Parts

Part No. 550-100-068/0308 39

Weil-McLain 88 Water and steam boilers — Series 2 —

for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Warranty

Weil-McLain Limited Warranties

Residential & Commercial Cast Iron Boilers

‹Residential Water Warranty — Limited Lifetime

‹Residential Steam Warranty — Limited 10 Year

‹Commercial Warranty — Limited 10 Year

First Year — (All Residential & Commercial Cast Iron Boilers)

Weil-McLain warrants that its cast iron boilers are free from defects in material and workmanship for one year from date of installation. If any parts are found to be defective from such defects, Weil-McLain will provide replacement of such defective parts.

Second Through Tenth Year — (Residential & Commercial Water/Steam)

Weil-McLain warrants that the cast iron sections of its water and steam boilers are free from defects in material and workmanship from the date of installation for the second through the tenth year. If, during such time, any section is found to be defective, Weil-McLain will provide replacement of such defective section(s).

Eleventh Year and Beyond — (Residential Water Only)

Weil-McLain warrants that the cast iron sections of its residential water boilers are free from defects in material and workmanship for the eleventh year and beyond from the date of installation. If, during such time period, any section(s) is found to be defective,

Weil-McLain will provide replacement of such defective section(s) upon the payment of a proportionate charge based on the time the boiler has been in service. The proportionate charge will be equal to the appropriate percentage of the list price of such section(s) at the time the warranty claim is made, and will be determined as follows: 11th year-5%; 12th year-10%; 13th year-15%; 14th year-

20%; 15th year-25%; 16th year-30%; 17th year-35%; 18th year-40%; 19th year-

45%; 20th year-50%; 21st year-55%; 22nd year-60%; 23rd year-65%; 24th year-

70%; 25th year & beyond -75%.

These warranties do not cover

boilers operated with combustion air contaminated externally by chemical vapors or with improper fuel additives, or with water conditions which may have caused unusual deposits in the cast iron sections.

See section “For all Weil-McLain Products”

for additional warranty information.

Weil-McLain

Ultra

Cast Aluminum Boilers

‹Residential Warranty — Limited 15 Year

(includes 5-Year Ultra Protection Plan)

‹Commercial Warranty — Limited 15 Year

(does NOT include Ultra HPP)

First Through Fifth Year —

Weil-McLain warrants that its cast aluminum boilers are free from defects in material and workmanship for one year from the date of installation and the heat exchanger is free from defects in material and workmanship for five years from the date of installation. If any parts in the first year, or the heat exchanger in the first five years are found to be defective from such defects, Weil-McLain will provide replacement of such defective parts or heat exchanger.

In addition to the product warranty, Weil-McLain will provide a 5-Year “

Ultra”

Homeowner Protection Plan (“UHPP”) for residential applications only to cover parts and labor for five years from the date of installation provided only if the Ultra boiler is properly registered with the UHPP Administrator within one month of the date of installation. UHPP claims must be processed directly through the Plan Administrator and not through Weil-McLain.

Sixth Through Tenth Year —

Weil-McLain warrants that the heat exchangers of its cast aluminum boilers are free from defects in material and workmanship for the sixth through the tenth year from the date of installation. If, during such time, the heat exchanger is found to be defective, Weil-McLain will provide replacement of such defective heat exchanger.

Eleventh Through Fifteenth Year —

Weil-McLain warrants that the heat exchangers of its cast aluminum boilers are free from defects in material and workmanship for the eleventh through fifteenth year from the date of installation.

If, during such time period, the heat exchanger is found to be defective, Weil-

McLain will provide replacement for such defective heat exchanger upon the payment of a proportionate charge based on the time the boiler has been in service. The proportionate charge will be equal to the appropriate percentage of the list price of such heat exchanger at the time the warranty claim is made, and will be determined as follows: 11th year - 10%; 12th year - 20%; 13th year -

40%; 14th year - 60%; 15th year - 80%; 16th year & beyond - 100%.

This warranty does not cover

boilers operated with combustion air contaminated externally by chemical vapors or with improper fuel additives, or with water/ system conditions which may have caused heat exchanger failure.

See section “For all Weil-McLain Products”

for additional warranty information.

April 1, 2003

Indirect-Fired Water Heaters

‹Residential Water Heater Warranty — Limited Lifetime

‹Commercial Water Heater Warranty — Limited 15 Year

First Year — (Residential and Commercial Water Heaters)

Weil-McLain warrants that its indirect-fired water heaters are free from defects in material and workmanship for one year from the date of installation. If any parts are found to be defective from such defects, Weil-McLain will provide replacement of such defective parts.

Second Year and Beyond — (Residential Only)

Second Through Fifth Years — (Commercial Only)

Weil-McLain warrants that the tank assembly components of its indirect-fired water heaters are free from defects in material and workmanship for the second through the fifth year from the date of installation (commercial only), or for the second year from the date of installation and beyond (for residential only). If, during such time periods, a leak in the tank assembly should occur, Weil-McLain will provide replacement for the original tank assembly.

Sixth Year through Fifteenth Year — (Commercial Only)

Weil-McLain warrants that the tank assembly components of its commercial indirect-fired water heaters are free from defects in material and workmanship for the sixth year through the fifteenth year following the date of installation. If, during such time period, a leak in the tank assembly should occur, Weil-McLain will provide replacement for such defective tank assembly. Such replacement will be furnished with the nearest comparable model available from Weil-McLain at the time of such replacement and upon payment of a proportionate charge. Proportionate charges will be equal to the appropriate percentage of the current list price of such commercial indirect-fired water heater at the time warranty claim is made and will be determined as follows: 6th & 7th year-55%; 8th &

9th year-60%; 10th & 11th year-65%; 12th & 13th year-70%; 14th & 15th year-75%.

These warranties do not cover:

1. Any water heater not initially installed with a new temperature-pressure relief valve bearing the listing of the American Society of Mechanical Engineers (A.S.M.E.) at the time of the water heater installation.

2. Any water heater that has a failure or malfunction resulting from a.) failure to keep the tank full of potable water; b.) failure to assure that water in the tank is free to circulate at all times; or c.) failure to keep the tank free of water sediment or scale deposits.

3. Any water heater that has potable water in the unit with a chloride or chlorine content higher than 80 mg/liter.

4. Any water heater installed in a residence containing any type of water softener system that is not installed and maintained in accordance with manufacturer’s specifications.

5. Any water heater installation where non-metallic piping products without an oxygen barrier are used.

6. Any water heater used for non-potable application such as pool or process heating.

See section “For all Weil-McLain Products”

for additional warranty information.

Radiant Heating Products

‹Radiant Heating Products Warranty — Limited 30 Year

‹IPP & IPC Products Warranty — Limited 3 Year

Weil-McLain warrants that its AlumiPex and Qual-Pex radiant heating products are free from defects in material and workmanship for thirty years (three years for IPP and IPC products) from the date of installation. If any parts are found to be defective from such defects during such time period, Weil-McLain will provide replacement of such defective parts. It is expressly understood that failure as a result of freezing of water within the pipes (tubing) does not constitute a defect in material or workmanship and shall not be covered by this warranty.

See section “For all Weil-McLain Products”

for additional warranty information.

Parts and Accessories

‹Parts and Accessories Warranty — Limited 1 Year

Weil-McLain warrants that parts and accessories that were purchased through Weil-

McLain are free from defects in material and workmanship for one year from the date of installation. If any parts and/or accessories are found to be defective from such defects during such time period, Weil-McLain will provide replacement of such defective parts. Parts and accessories covered under this warranty include only those items that are not covered under other Weil-McLain product warranties.

See section “For all Weil-McLain Products”

for additional warranty information.

For All Weil-McLain Products:

These warranties are subject to the condition that the Weil-McLain Product(s) must have been installed in accordance with manufacturers’ instructions by a heating contractor whose principal occupation is the sale and installation of plumbing, heating and/or air conditioning equipment.

These warranties extend only to the first retail purchaser of the products and only to a product that has not been moved from its original installation site.

In addition to each product warranty listed, Weil-McLain warranties do not cover:

1. Components that are part of the heating system (products) but were not furnished by Weil-McLain as a part of the heating system (products).

2. The workmanship of any installer of Weil-McLain’s product(s). In addition, this warranty does not assume any liability of any nature for unsatisfactory performance caused by improper installation.

3. Any costs for labor for removal and reinstallation of the alleged defective part, transportation to Weil-McLain, if necessary, and any other materials necessary to perform the exchange.

4. Any products that have a failure or malfunction resulting from improper or negligent operation, accident, abuse, freezing, misuse, unauthorized alteration or improper repair or maintenance.

5. Improper adjustments (including boiler/burner), control settings, care or maintenance. Information is in the installation, start-up, operations, owner/user’s manuals, service/maintenance instructions, and other printed/technical information provided with the product or direct from Weil-McLain or weil-mclain.com.

NOTE:

Residential warranties do not cover any residential products installed in buildings other than one or two family dwelling units, unless they are buildings with individual residential products for each dwelling unit.

THE WARRANTIES DESCRIBED HEREIN ARE IN LIEU OF ALL OTHER WAR-

RANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IM-

PLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE AND MER-

CHANTABILITY. WEIL-McLAIN EXPRESSLY DISCLAIMS AND EXCLUDES ANY

LIABILITY FOR CONSEQUENTIAL, INCIDENTAL, INDIRECT OR PUNITIVE DAM-

AGES FOR BREACH OF ANY EXPRESS WARRANTY.

For prompt product warranty claims, notify the installer who, in turn, will notify the Weil-McLain distributor from whom he purchased the boiler. If this action does not result in warranty resolution, contact Weil-McLain Consumer Relations Department, 500 Blaine Street, Michigan City, Indiana 46360, with details in support of the warranty claim. Alleged defective part or parts must be returned through the same trade channel in accordance with the Weil-McLain procedure currently in force for handling returned goods for the purpose of inspection to determine cause of failure. Weil-McLain will furnish new part(s) to an authorized Weil-McLain distributor who, in turn will furnish the new part

(s) to the heating contractor who installed the boiler. If you have any questions about the coverage of this warranty, contact Weil-McLain at the address above.

Part No. 550-141-950/0403

40 Part No. 550-100-068/0308

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