Webster – Model WJB

Boiler

Burner Input

Positive

Standard Burner Model

Standard Combustion

Standard Control

Burner Motor

 

 

Designation

 

 

Control

 

 

System

3450 RPM H.P.

 

Model

 

 

Pressure in

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Standard

Number

No. 2

 

 

 

 

 

 

 

 

 

 

 

 

Gas/

 

 

Gas/

Gas

Firebox

 

 

Light

 

Gas/

 

Light

Gas/

 

 

Light

Gas

Light

Voltage

88

Gas

 

 

Gas

Gas

 

Oil

In. W.C.

 

 

 

Light

Light

 

Series 2

MBH

 

Oil

 

Light Oil

Oil

Light Oil

 

Oil

H.P.

Oil

 

 

GPH

 

 

 

 

 

 

 

 

 

 

 

 

 

Oil

 

 

Oil

 

488R

6.9

996

0.68

WJB1G-03

WJB1O-03

WJB1C-03

RM7897A

R7184A

RM7897C

A

 

A

A

1/3

1/3

1/3

See notes

488

7.0

1010

0.70

WJB1G-03

WJB1O-03

WJB1C-03

RM7897A

R7184A

RM7897C

A

 

A

A

1/3

1/3

1/3

See notes

588

9.4

1357

0.60

WJB1G-05

WJB1O-05

WJB1C-05

RM7897A

R7184A

RM7897C

LFS

 

LFS

LFS

1/2

1/2

1/2

See notes

688

11.8

1701

0.58

WJB1G-07

WJB1O-07

WJB1C-07

RM7897A

R7184A

RM7897C

LFS

 

LFS

LFS

3/4

3/4

3/4

See notes

788

14.2

2046

0.65

WJB1G-07

WJB1O-07

WJB1C-07

RM7897A

R7184A

RM7897C

LFS

 

LFS

LFS

3/4

3/4

3/4

See notes

888

16.6

2382

0.66

WJB2G-07

WJB2O-10

WJB2C-10

RM7897A

RM7897A

RM7897C

LFS

 

LFS

LFS

3/4

1

1

See notes

988R

17.2

2482

0.54

WJB2G-10

WJB2O-10

WJB2C-10

RM7897A

RM7897A

RM7897C

LFS

 

LFS

LFS

1

1

1

See notes

988

18.8

2737

0.63

WJB2G-10

WJB2O-10

WJB2C-10

RM7897C

RM7897A

RM7897C

LFS

 

LFS

LFS

1

1

1

See notes

1088R

20.0

2887

0.68

WJB2G-10

WJB2O-15

WJB2C-15

RM7897C

RM7897A

RM7897C

LFS

 

LFS

LFS

1

1 1/2

1 1/2

See notes

1088

21.5

3082

0.78

WJB2G-10

WJB2O-15

WJB2C-15

RM7897C

RM7897A

RM7897C

LFS

 

LFS

LFS

1

1 1/2

1 1/2

See notes

1188

23.5

3428

0.78

WJB2G-15

WJB2O-15

WJB2C-15

RM7897C

RM7897A

RM7897C

LFS

 

LFS

LFS

1 1/2

1 1/2

1 1/2

See notes

1288

26.0

3773

0.76

WJB2G-15

WJB2O-15

WJB2C-15

RM7897C

RM7897A

RM7897C

LFS

 

LFS

LFS

1 1/2

1 1/2

1 1/2

See notes

1388

28.5

4119

0.77

WJB2G-20

WJB2O-15

WJB2C-20

RM7897C

RM7897A

RM7897C

LFS

 

LFS

LFS

2

2

2

See notes

1488

31.0

4464

0.78

WJB2G-20

WJB2O-15

WJB2C-30

RM7897C

RM7897A

RM7897C

LFS

 

LFS

LFS

2

2

3

See notes

1588

33.0

4809

0.73

WJB2G-20

WJB2O-30

WJB2C-20

RM7897C

RM7897A

RM7897C

LFS

 

LFS

LFS

2

3

2

See notes

1688R

34.5

4979

0.68

WJB2G-30

WJB2O-30

WJB2C-30

RM7897C

RM7897A

RM7897C

LFS

 

LFS

LFS

3

3

3

See notes

1688

35.5

5155

0.74

WJB2G-30

WJB2O-30

WJB2C-30

RM7897C

RM7897C

RM7897C

LFS

 

LFS

LFS

3

3

3

See notes

1788

38.0

5494

0.82

WJB2G-30

WJB2O-30

WJB2C-30

RM7897C

RM7897C

RM7897C

LFS

 

LFS

LFS

3

3

3

See notes

1888

40.5

5845

0.80

WJB2G-30

 

WJB2O-30

 

WJB3C-50

RM7840L

RM7897C

RM7840L

MOD

 

LFS

MOD

3

3

5

See notes

Standard Voltage Notes: 1/3 HP blower motor through ¾ HP – 120V/60/3 phase, 1 HP blower motor – 240V/60/3 phase, 1-½ HP blower motor through 5 HP- 240V/60/3 phase

Standard Gas Components and Sizes in Inches

 

Boiler

Manual

Low Gas

Gas Pressure

Diaphragm

Motorized

Motorized Operat-

Safety Gas

Manual

High Gas

 

Model

Hand

Pressure

Operating

Operating

ing Gas Valve w/

Checking

Pressure

 

Number

Valve

Switch

Regulator

Gas Valve

Gas Valve

Proof of Closure

Valve

Gas Valve

Switch

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

488R

1-¼

Optional

1-¼

1

n/a

n/a

1-¼

1

Optional

 

488

1-¼

Optional

1-¼

1

n/a

n/a

1-¼

1

Optional

 

588

1-¼

Optional

1-¼

n/a

1-¼

n/a

1-¼

1-¼

Optional

 

688

1-½

Optional

1 ½

n/a

1-½

n/a

1-½

1-½

Optional

 

788

1-½

Optional

1 ½

n/a

2

n/a

2

2

Optional

 

888

1-½

Optional

1 ½

n/a

2

n/a

2

2

Optional

 

988R

1-½

Optional

1 ½

n/a

2

n/a

2

2

Optional

 

988

1-½

Standard

1 ½

n/a

2

n/a

2

2

Standard

 

1088R

1-½

Standard

1 ½

n/a

2

n/a

2

2

Standard

 

1088

2

Standard

2

n/a

2

n/a

2

2

Standard

 

1188

2

Standard

2

n/a

2

n/a

2

2

Standard

 

1288

2-½

Standard

2-½

n/a

2

n/a

2-½

2

Standard

 

1388

2-½

Standard

2-½

n/a

2

n/a

2-½

2

Standard

 

1488

2-½

Standard

2-½

n/a

2

n/a

2-½

2

Standard

 

1588

2-½

Standard

2-½

n/a

2

n/a

2-½

2

Standard

 

1688R

2-½

Standard

2-½

n/a

2

n/a

2-½

2

Standard

 

1688

2-½

Standard

2-½

n/a

2

2”

2-½

2

Standard

 

1788

2-½

Standard

2-½

n/a

2-½

2-½

2-½

2-½

Standard

 

1888

2-½

Standard

2-½

n/a

2-½

2-½

2-½

2-½

Standard

 

 

 

 

 

 

 

 

 

 

 

 

Notes

1.Burner capacities listed for elevations up to 2,000 feet. For higher elevations, consult localWeil-McLain distributor/agent or sales office.

2.Light Oil ratings based on No. 2 fuel oil with heating value of 140,000 Btu per gallon.

3.Gas ratings based on natural gas with heating value of 1,000 Btu per cubic foot and specific gravity of 0.60. Gas burners for other gases are available. Consult local Weil-McLain distributor/agent or sales office.

4.Boiler-burner unit to be adjusted to achieve +0.10 inchesW.C. pressure at the flue collar, resulting in positive pressure in firebox as listed.

5.Minimum gas pressures listed are subject to variations due to job conditions. Gas burners for other gas pressures are available. Consult localWeil-McLain distribu- tor/agent or sales office.

6.Gas orifice pressures shown are for initial start-up. Final pressures should be determined after checking actual gas flow and combustion readings.

2

Part Number 550-142-022/0509

Page 2
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Weil-McLain WJB2, WJB1 manual Webster Model WJB, Mbh, Gph

WJB2, WJB1 specifications

Weil-McLain, a leading manufacturer in the heating industry, offers a range of innovative products designed for efficiency and performance, with the WJB1 and WJB2 modulating condensing boilers standing out as prominent options for residential and commercial heating applications.

The WJB1 and WJB2 models are engineered for high efficiency, featuring advanced condensing technology that allows them to capture and utilize latent heat from exhaust gases. This maximizes thermal efficiency, making them an ideal choice for those looking to reduce energy consumption and lower utility bills. Both models boast an impressive AFUE (Annual Fuel Utilization Efficiency) rating, reaching up to 95%. This means that a significant portion of the energy consumed is converted into usable heat, minimizing waste.

These boilers are built with durable materials designed to withstand the rigors of daily use. The heat exchanger, which is one of the critical components, is crafted from stainless steel, providing excellent corrosion resistance and contributing to the longevity of the unit. This construction not only enhances the boiler's lifespan but also supports consistent performance over time.

One notable feature of the WJB1 and WJB2 is their integrated control system. Equipped with user-friendly interfaces, these models allow for easy adjustment and monitoring, ensuring that users can optimize their heating requirements based on real-time demands. The modulating capabilities enable the boiler to adjust its output according to the specific heating needs, which results in enhanced comfort and reduced energy waste.

Additionally, the WJB1 and WJB2 models are designed with environmental considerations in mind. Their low NOx emissions help promote cleaner air quality, making them compliant with stringent environmental regulations. This commitment to sustainability is a key aspect of Weil-McLain's product design philosophy.

Another significant attribute is their versatility in installation. The compact design allows for various placement options, whether it’s in a basement, utility room, or garage. Moreover, these boilers can be easily integrated into existing heating systems, which is advantageous for retrofitting older buildings.

In summary, the Weil-McLain WJB1 and WJB2 modulating condensing boilers are characterized by their high efficiency, durable construction, advanced control technology, eco-friendliness, and installation flexibility. These features make them an excellent investment for homeowners and businesses aiming for reliable and efficient heating solutions.