Weil-McLain 78 manual 17a Ratings

Page 31

• Installation

Start-Up

• Maintenance

• Parts

17a Ratings

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I=B=R Burner

 

 

✝ ✝

 

 

 

 

 

 

 

Boiler Water

 

 

Capacity

 

Net I=B=R Ratings

 

 

 

 

 

Content Gals.

Packaged

 

 

 

✝ ■

 

 

 

 

 

 

* *

Positive

 

 

 

Boiler

 

* *

 

Gross

 

 

 

 

 

Net

Stack

Presure

I=B=R

 

 

Weight

 

Light

❍ ■

I=B=R

 

 

 

Firebox

Gas

In

Vent

 

Steam

Less

 

Oil

Gas

Output

Steam

Steam

Water

 

Boiler

Volume

Volume

Firebox

Dia.

 

to

Water

Boiler Model

GPH

MBH

MBH

Sg. Ft.

MBH

MBH

 

H.P.

Cu. Ft.

CFM

In. W.C.

Inches

Water

Waterline

Lbs.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-378- *F

2.40

346

278

871

209

242

8.3

2.61

139

0.22

8

37.5

27.5

1355

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-478- *F

3.40

494

400

1250

300

348

11.9

3.97

198

0.22

8

49.0

36.0

1615

-578- *F

4.45

641

521

1629

391

453

15.6

5.33

259

0.21

8

60.5

44.5

1875

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-678- *F

5.50

789

643

2008

482

559

19.2

6.69

320

0.21

8

72.0

53.0

2130

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-778- *F

6.50

937

764

2388

573

664

22.8

8.05

378

0.21

10

83.5

61.5

2390

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-878- *F

7.50

1084

886

2771

665

770

26.4

9.41

436

0.20

10

95.0

70.0

2650

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-978- *F

8.50

1232

1007

3154

755

876

30.1

10.77

494

0.20

10

106.5

78.5

2910

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-1078- *F

9.60

1379

1129

3533

847

982

33.7

12.13

558

0.20

10

118.0

87.0

3165

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-1178- *F

10.60

1527

1250

3917

938

1087

37.3

13.49

616

0.19

10

129.5

95.5

3425

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-1278- *F

11.60

1674

1372

4321

1039

1193

41.0

14.85

675

0.19

12

141.0

104.0

3680

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Use prefix “BL” for light oil, “BG” for gas, “BGL” for gas-light oil, or “H” for boiler only for use with approved burners. Add prefix “A” to designator for factory-assembled 78 (ABL-478). Substitute “P” for “B” for fire-tested package unit (PL-478).

*Substitute “S” for steam, “W” for water.

For T-intermediate section(s) and tankless heater(s) add suffix “(number required) TIH”; for T-intermediate section(s) with cover plate(s) only add suffix “(number required) TIP”.

Burner input based on maximum of 2,000 feet altitude - for higher altitudes consult a Weil-McLain representative. ** No. 2 fuel oil - Commercial Standard Spec. CS75-56. Heat value of oil - 140,000 Btu/Gal.

Consult Weil-McLain BURNER SPEC AND DATA SHEET for gas pressures required. MBH refers to thousands of BTU per hour.

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

✝✝ Net I=B=R ratings are based on net installed radiation of sufficient quantity for the requirements of the building and 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: 378 through 1178 - 1.333; 1278

-1.321. An additional allowance should be made for gravity hot water systems or for unusual piping and pick-up loads. Consult a Weil-McLain representative.

*** Stack gas volume at outlet temperature. With 0.10" W.C. positive at flue collar.

Note: Sections tested for 80 PSIG working pressure.

Part No. 550-141-705

31

Image 31
Contents Boiler Manual Contents Provide combustion and ventilation air openings 1a Before Installing BoilerInstallation must comply with Before selecting boiler locationBoiler Foundation Length Table 1b Before Installing BoilerProvide clearances for servicing around boiler Lay a foundation, if neededFor packaged boiler 2a Set Packaged Boiler or Block Assembly in PlaceFor block assembly Lifting Weight Chart3a Assemble Block Install back refractory blanketPrepare back section Page Prepare remaining sections Install burner mounting plate on front sectionIf using TI sections 3c Assemble BlockPage 3e Assemble Block Prepare flue collector hood assembly3f Assemble Block Install flue collector hood assemblyPage 5a Connect Water Boiler Piping Install pipingGeneral water piping information Page General steam piping information 6a Connect Steam Boiler PipingSteam Boiler Pipe Size Table Based on 2-Pipe Steam System Page Page Page Page Page Page Page Page To wire burner and boiler controls 12a Install Burner13a Wiring and Fuel Piping To install burnerTo fill steam boilers 14a Make Final AdjustmentsAdjust burner and breeching damper To fill water boilersCheck boiler for gas-tight seal 14b Make Final AdjustmentsSkim steam boilers Determine if water treatment is needed water boilers onlyData Dimensions 15a Data and Dimensions15b Data and Dimensions 16a Parts Figure No Description 16b Parts17a Ratings Part No -141-705/0600

78 specifications

The Weil-McLain 78 is a high-efficiency, versatile cast iron boiler that has been a staple in residential and commercial heating applications for decades. Renowned for its durability and performance, the boiler is designed to provide reliable heat while maintaining efficiency and minimizing energy consumption.

One of the main features of the Weil-McLain 78 is its cast iron construction. This material is not only known for its longevity but also for its excellent heat retention properties. The cast iron sections allow for a slow, steady heat release, ensuring that spaces remain warm and comfortable. The boiler is built to withstand the rigors of everyday use, making it ideal for both home and business environments.

In terms of technology, the Weil-McLain 78 incorporates an advanced combustion system that optimizes fuel usage. This efficient burning process not only conserves energy but also contributes to lower utility bills for users. Moreover, the boiler is designed to work well with natural gas or propane, giving homeowners and businesses flexibility in fuel choices.

Another characteristic contributing to the Weil-McLain 78’s reputation is its efficiency ratings. With a rating of 83% AFUE (Annual Fuel Utilization Efficiency), this boiler stands out in its class. This efficiency not only reduces carbon emissions but also enhances overall operational effectiveness, allowing for significant energy savings over time.

The Weil-McLain 78 is also designed for ease of installation and maintenance. Its compact design allows it to fit in tighter spaces, and the accessibility of key components simplifies routine servicing. The unit comes with a multitude of options for controls and accessories, ensuring adaptability to various heating systems.

Furthermore, Weil-McLain places a strong emphasis on safety features. The 78 model incorporates multiple safety controls, including a temperature limit switch and an automatic shut-off system. These features help prevent overheating and provide peace of mind for users.

In conclusion, the Weil-McLain 78 combines robust construction, advanced technology, and efficiency, making it an excellent choice for various heating needs. Its reputation for reliability, comfort, and safety has positioned it as a leader in the boiler market for both residential and commercial applications. With the Weil-McLain 78, users can enjoy consistent warmth and comfort for years to come, backed by a trusted name in heating solutions.