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 dam- age boiler, resulting in substantial property damage.

Do not use petroleum-based cleaning or sealing com- pounds 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 accesso- ries.

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

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Weil-McLain 88 manual Perform hydrostatic pressure test, Prepare boiler and test, Steam boiler Between 45 and 55 psig
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88 specifications

The Weil-McLain 88 series is a commercial cast iron boiler recognized for its durability, efficiency, and versatile design, making it a preferred choice for various heating applications. Designed primarily for commercial and industrial use, the Weil-McLain 88 combines advanced technology with proven engineering principles to deliver reliable performance and long-lasting service.

One of the standout features of the Weil-McLain 88 is its cast iron construction. Cast iron is renowned for its ability to retain heat, resulting in lower fuel consumption and more consistent heating. This robust material ensures that the boiler can withstand high temperatures and pressures, making it suitable for heavy-duty applications. The sectional design of the boiler allows for easy installation and maintenance, enabling quick access to components and minimizing downtime.

In terms of efficiency, the Weil-McLain 88 is designed to achieve high thermal efficiency ratings. The boiler employs a flue gas recirculation system, which significantly reduces heat loss and maximizes energy utilization. Additionally, its low water content provides rapid heating response times, ensuring that spaces are heated promptly, even during peak demand periods.

Another noteworthy characteristic of the Weil-McLain 88 is its versatility. The boiler can be configured for a variety of applications, including hot water heating, hydronic heating systems, and steam heating. It is compatible with multiple fuel types, including natural gas, propane, and various oil options, allowing for flexibility in fuel choice based on availability and pricing.

The Weil-McLain 88 also incorporates advanced control technologies that enhance operational efficiency. The integrated electronic controls feature diagnostic capabilities to streamline troubleshooting and maintenance, ensuring optimal performance throughout the boiler’s lifespan. Moreover, the boiler's design is compatible with modern building management systems, allowing for seamless integration into existing heating setups.

Overall, the Weil-McLain 88 series stands out for its combination of quality construction, efficient operation, and adaptability to different heating needs. Whether for a commercial building, industrial facility, or institutional application, the Weil-McLain 88 provides a reliable and efficient heating solution that meets the demands of the modern world.
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