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:

Figure 20 Cold water fill piping

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

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

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

4.Install piping:

a.Install piping as shown on page 17 through page 18 for single boil- ers. See page 19 for additional requirements when piping multiple boilers.

b.Return pipe sizing.

Pumped return — Size return piping by pump.

Gravity return — Size gravity return same as Hartford loop

Figure 21 Condensate piping to boiler

equalizer pipe size.

 

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

d.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.

e.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 22 Condensate receiver capacity required

Boiler

I=B=R gross output

Gallons condensate

Minimum condensate receiver capacity (gallons) (Note 1)

Recommended condensate

model number

(lbs steam per hour)

per hour

 

 

 

 

feed pump capacity

15-minute boiler

30-minute boiler

45-minute boiler

60-minute boiler

 

 

 

GPM at 15 PSI

 

 

 

operation

operation

operation

operation

 

488

810

97

29

58

87

116

3.2

488R

794

95

28

57

85

114

3.1

588

1084

130

39

78

117

156

4.3

688

1358

163

49

98

147

196

5.4

788

1632

195

59

117

176

234

6.5

888

1904

228

68

137

205

273

7.6

988

2170

261

78

157

235

313

8.7

988R

1991

239

72

145

217

289

8.0

1088

2452

294

88

176

265

353

9.8

1088R

2304

277

83

166

249

332

9.2

1188

2724

327

98

196

294

392

10.9

1288

3000

360

108

216

324

432

12.0

1388

3270

392

117

235

353

470

13.1

1488

3550

426

127

255

383

511

14.2

1588

3820

458

137

274

412

550

15.3

1688

4090

490

147

294

441

588

16.4

1688R

3980

478

143

287

430

574

15.9

1788

4370

524

157

314

471

629

14.5

1888

4640

557

167

334

501

668

18.6

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

16

Part No. 550-100-068/0308

Page 16
Image 16
Weil-McLain 88 manual Connect steam boiler piping, General steam piping information

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.