Weil-McLain 88 User Manual

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88

Water & steam boilers – Series 2

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

Boiler Manual

• Installation

• Maintenance

 

• Startup

• 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 INSTALLER

Consider piping and installation when determining

heating installer/service technician. Read all

boiler location.

instructions before installing. Follow all in-

Any claims for damage or shortage in shipment must be

structions in proper order. Failure to comply

filed immediately against the transportation company

could result in severe personal injury, death

by the consignee.

or substantial property damage.

 

USER . . . .

This manual is for use only by your qualified heating

When calling or writing about the boiler—

installer/service technician. Boiler and burner must be

Please have the boiler model number from the

installed by a qualified service technician. We recom-

boiler rating label and the CP number from

mend regular service by a qualified service technician,

the boiler jacket.

at least annually.

 

Part No. 550-100-068/0308

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.

2

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

2.Regulations of servicing utilities.

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

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

5.National codes where applicable.

Before selecting boiler location

1.Check for nearby connections to:

a.Fuel supply.

b.Electrical power.

c.System water or steam piping.

d.Venting systems - see page 29.

e.Combustion and ventilation air supply — see page 5.

2.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.Provide minimum clearances to combustible materials:

Boiler top — 24 inches.

Boiler front — 48 inches.

Boiler flue — 9 inches.

Boiler rear — 9 inches.

Boiler sides — 6 inches.

Single-wall vent pipe – 18 inches.

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

2.Boiler may be installed on combustible flooring.

3.See page 36 for boiler dimensions.

Flue pipe/breeching clearances take precedence over jacket clearances.

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

2.A level concrete or brick foundation, constructed per Figure 1 and Figure 2 is required when:

a.A floor could possibly become flooded.

b.Non-level conditions exist.

4

Figure 1 Boiler foundation, when required

Figure 2 Boiler foundation (see Figure 1)

Boiler model

Length, L, minimum

number

(inches)

 

 

488

33

 

 

588

41

 

 

688

49

 

 

788

57

 

 

888

65

 

 

988

73

 

 

1088

81

 

 

1188

89

 

 

1288

97

 

 

1388

105

 

 

1488

113

 

 

1588

121

 

 

1688

129

 

 

1788

137

 

 

1888

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.

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 in2/1000 Btuh (2200 mm2/kW) of the total input rating of all appliances in the space but not less than 100 in2 (0.06 m2). 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 in2/1000 Btuh (4400 mm2/kW) of total input rating of all appliances.

Part No. 550-100-068/0308

Figure 4 Combustion and ventilation air openings

— Boiler room partially or completely above grade

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

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 in2/4000 Btuh (550 mm2/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 in2/2000 Btuh (1100 mm2/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 in2/3000 Btu/hr (700 mm2 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 ft3/minute per 1000 Btuh (0.034 m3/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.

6

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.

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.

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

3.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.

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

5.Level boiler. Shim under skid angles, if necessary.

6.Cut off cables.

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.

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

For block assembly:

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

2.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.

Usinghoist–attachfreeendof cablestohoist.Raiseboileroff skid.

Use pipe rollers under steel skid angles to roll boiler.

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

4.Level boiler. Shim under skid angles, if necessary.

5.Cut off cables.

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.

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

Part No. 550-100-068/0308

Figure 5 Section assembly lifting weights

Boiler

Approximate

Minimum

model

lifting

sling length —

number

weight

(from crane hook to

 

 

 

(pounds)

boiler lifting lugs)

 

 

 

488

2928

2' 6"

 

 

 

588

3490

3' 0"

 

 

 

688

4152

4' 0"

 

 

 

788

4714

4' 6"

 

 

 

888

5276

5' 0"

 

 

 

988

5838

6' 0"

 

 

 

1088

6400

6' 6"

 

 

 

1188

7062

7' 0"

 

 

 

1288

7624

8' 0"

 

 

 

1388

8186

8' 6"

 

 

 

1488

8748

9' 0"

 

 

 

1588

9310

10' 0"

 

 

 

1688

9872

10' 6"

 

 

 

1788

10,584

11' 0"

 

 

 

1888

11,146

12' 0"

 

 

 

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

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

b.Mark all unsealed areas.

c.At unsealed areas, check for:

Damaged gaskets.

Sealing rope not in place.

Loose bolts or nuts.

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

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

7

Weil-McLain 88 User Manual

Weil-McLain 88 Water and steam boilers — Series 2 — for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Assembling the block

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.

8

Figure 6 Sealing rope installation

Figure 7 Silicone sealant

Part No. 550-100-068/0308

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

Assembling the block

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

d.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.

Part No. 550-100-068/0308

Figure 8 Sealing ring installation and port alignment

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.

9

Weil-McLain 88 Water and steam boilers — Series 2 — for Gas, Light Oil, & Gas/Light Oil-Fired Burners

Assembling the block (continued)

Figure 9 Section arrangement

 

Boiler model

Max.

Section arrangement

 

number

number

(all heaters must be on left side of boiler)

 

W = water

of

 

 

tankless

F = front / B = back / I = Intermediate

 

S = steam

 

 

heaters

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

 

 

 

"I" can be substituted for "TI" sections

 

 

 

 

 

488 W&S

1

F • TI • I • B

 

 

 

 

 

588 W&S

2

F • TI • I • TI • B

 

 

 

 

 

688 W&S

2

F • TI • I • TI • I • B

 

 

 

 

 

788 W&S

3

F • TI • I • TI • I • TI • B

 

 

 

 

 

888 W&S

3

F • TI • I • TI • I • TI • I • B

 

 

 

 

 

988 W&S

4

F • TI • I • TI • I • TI • I • TI • B

 

 

 

 

 

1088 W&S

4

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

 

 

 

 

 

1188 W&S

5

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

 

 

 

 

 

1288 W

5

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

 

 

 

 

 

1288 S

4

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

 

 

 

 

 

1388 W

6

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

 

 

 

 

 

1388 S

6

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

 

 

 

 

 

1488 W

6

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

 

 

 

 

 

1488 S

5

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

 

 

 

 

 

1588 W

7

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

 

 

 

 

 

1588 S

7

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

 

 

 

 

 

1688 W

7

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

 

 

 

 

 

1688 S

7

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

 

 

 

 

 

1788 W

8

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

 

 

 

 

 

1788 S

8

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

 

 

 

 

 

1888 W

8

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

 

 

 

 

 

1888 S

6

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

 

 

 

 

10

 

 

Part No. 550-100-068/0308

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

Perform hydrostatic pressure test

Prepare boiler and test:

Figure 11 Boiler tappings

1.See Figure 10 and Figure 11 for tapping locations. Install:

a.Boiler drain (not furnished).

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

c.Air vent in upper tapping (K).

2.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.Steam boiler: Between 45 and 55 psig.

b.Water boiler: 1½ times maximum allowable working pressure (MAWP) stamped on the boiler nameplate, located on boiler jacket front panel.

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

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

4. 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.

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

5.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

Size

Steam

Water

 

 

 

 

 

 

A

2"

Steam relief valve and/or

High limit

 

 

 

Skim tapping

Manual reset limit

 

 

 

 

 

 

B

2"

Steam relief valve

Water relief valve

 

L

1"

Secondary probe LWCO

Not used — Plug

 

 

 

 

 

 

C1 & C2

1"

Low water cut-offs

Alternate low water cut-offs

 

C1

 

Combination high and low

 

 

 

 

limit control

 

 

 

 

 

 

D1 & D2

1"

Alternate low water cut-offs

Firing rate temperature

 

 

 

 

control (when used)

 

 

 

 

Low water cut-offs

 

E1 & E2

½"

Gauge glass

 

F1 & F2

C\,"

Try cock tappings

 

G

¾"

Pressure limit control,

Combination pressure–

 

 

 

Pressure operating control and

temperature gauge

 

 

 

pressure gauge,

 

 

 

 

Firing rate pressure control

 

 

 

 

(when used)

 

 

H

¾"

Boiler drain (see Figure 17,

Boiler drain

 

 

 

page page 15, for system blow-

 

 

 

 

off (drain) valve locations and

 

 

 

 

sizes

 

 

 

 

 

 

 

K

1"

Piping to compression tank or

 

 

 

 

automatic air vent

 

Part No. 550-100-068/0308

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

b.Position 3/8" sealing rope in groove.

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

1.Install four ½" x 3½" studs to secure burner mounting plate to section:

a.Thread and lock together two nuts on rounded end of stud. Thread flat end of stud into one of four holes located around opening.

b.Remove nuts.

c.Repeat steps a and b for remaining studs.

2.Repeat above steps for back observation port assembly.

Insert HXT-bars

1. See Figure 12, page 12.

2.Install burner mounting plate:

a.Apply 1/8" continuous bead of sealing rope adhesive in groove around opening in section.

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

c.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.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

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