™

www.weil-mclain.com

WTGO™GOLD SERIES OIL BOILER

Water with Tankless Heater | Chimney Vent | 86-295 MBH Series 3 | Efficiency 85-87%*

*ENERGY STAR® requires a minimum of 87% AFUE, which is only achieved by these models by reducing the burner rate and installing the optional

vent damper kit. See Ratings chart on next page.

*

APPLICATIONS INCLUDE:

ResidentialLight CommercialMultiple BoilersRadiant Heating

...And Much More

HIGH EFFICIENCY CAST IRON BOILER

■ Provides space and domestic hot water heating

■ Durable cast iron heat exchanger design

■ Made with Weil-McLain quality

NOTES:** Add “P” for packaged boiler (WTGO-3 through WTGO-6 only). Add “A” for boiler only (WTGO-3 through WTGO-9).(1) No. 2 fuel oil-Commercial Standard Specification CS75-56. Heating value of oil-140,000 BTU/Gal.(2) Based on standard test procedures prescribed by the United States Department of Energy at combustion condition of 13 1/2% CO2 and -0.02” W.C. draft.(3) MBH refers to thousands of BTU per hour.(4) AHRI gross output.(5)Net AHRI ratings are based on net installed radiation adequate for the requirements of the building, including a piping and pickup allowance of 1.15-sufficient for normal conditions. Provide additional allowance only for unusual piping and pickup loads. (6) Tankless heater rating is in gallons of water per minute, heated from 40oF to 140oF with 200oF boiler water temperature-tested in accordance with I-W-H Testing and Rating Standard for Indirect Tankless Water Heaters Test with Boilers.

■ Factory Tested and Assembled Cast Iron Section Assembly (jacket and collector hood are not assembled on 7, 8 and 9 section blocks)

■ Tankless Heater (P-units) or Tankless Opening Cover Plate (A-units)

■ Insulated Steel Jacket■ Aluminized Steel Flue Collector

Hood with Flue Cap on Top Outlet (convertible to rear outlet)

■ Swing-Away Burner Mounting Door■ Refractory Blanket and Target Wall

in Combustion Area■ Circulator (Taco 007)-When Ordered ■ Comb. Temp. Controls, LWCO,

Circulator Relay (all P-units/A-units ordered with tankless heater), and integrated service switch

■ Two Vent Pipe Brackets ■ Pressure / Temperature Gauge ■ 30 PSI ASME Relief Valve (boiler

sections tested for 50 PSIG working pressure)

■ Drain Valve ■ Barometric Damper

■ High-Efficiency Flame-Retention Oil Burner (Beckett AFG, Carlin EZ or Riello). Specify 2-Stage Fuel Unit (optional) if Required

■ Vent Damper Kit ■ W-M 5 & 10 Year Homeowner

Protection Plan ■ W-M Indirect-Fired Water Heaters

OPTIONAL EQUIPMENT:

Tapp

ing

Size

Con

trol

B2

E3

HLN

R1

1 1/2

1/2

3/4

3/4

1/2

3/4

Alternate return - “A” units only

Pressure/temperature gauge

Drain valve

High limit/circulator control

Piping to expansion tank or automatic air vent

Relief valve

(inc

hes)

Loca

tion

A-WTGO FrontSide Back Intermediate

DIMENSIONS STANDARD EQUIPMENT:

Mod

el

P-W

GO

A-W

GO

Retu

rn

B L

WTGO-3

WTGO-3L

WTGO-4

WTGO-5

WTGO-6

WTGO-7

WTGO-8

WTGO-9

Dimension (inches)

1 1/4 (circulator flange)

not applicable

not applicable

not applicable

1 1/2

1 1/2

1 1/2

1 1/2

1 1/2

1 1/2

1 1/2

1 1/2

1 1/2

1 1/2

1 1/2

1 1/2

1 1/2

1 1/2

1 1/2

1 1/2

13 3/4

16 7/8

20

23 1/8

26 1/4

32 1/2

29 3/8

16 7/8

10 1/2

13 5/8

16 7/8

20

23 1/8

29 3/8

26 1/4

13 1/2

Supply “C” (inches)

(inc

hes)

Num

ber

WT-14

WT-14

WT-14

WT-14

WT-14

WT-20

WT-20

WT-20

1/2

1/2

1/2

1/2

1/2

1/2

1/2

1/2

Inle

t & O

utle

t(N

PT)

(in)

3/4

3/4

3/4

3/4

3/4

3/4

3/4

3/4

Tem

p C

ontr

ol(N

PT)

(in)

Tankless Heater

1 1/4 (circulator flange)

1 1/4 (circulator flange)

1 1/2 (circulator flange)

1 1/2 (circulator flange)

Mod

el**

Hea

ting

Net

Rat

ingS

Dra

ft L

oss

Thro

ugh

Roun

d (i

n.)

Hei

ght (

ft.)

App

rox.

Shi

ppin

g

(MB

H)

(2)

(3)

(MBH

) (3

) (5

)

Boi

ler (

in w

/c)

WTGO-3LR 98 75

WTGO-3RD 112 85

WTGO-4RD 140 107

WTGO-5RD 168 129

WTGO-6RD 196 150

WTGO-7RD 224 171

WTGO-8 322 231 (4)WTGO-9 357 257 (4)

GPH

(1)

Minimum Chimney Size

Wei

ght (

Lbs)

Rect

angu

lar (

in.)

ENER

GY

STA

R*

WTGO-3L 133 99

WTGO-3 133 100

WTGO-4 168 126

WTGO-5 203 152

WTGO-6 245 184

WTGO-7

540

595

645

760

860

930

1,0301,135

540

595

645

760

860

930

0.70

0.80

1.00

1.20

1.40

1.60

2.302.55

0.95

0.95

1.20

1.45

1.75

2.00 280

86

98

123

148

173

197

266295

114

115

145

175

212

242 210

.010

.010

.010

.015

.015

.015

.025

.030

.010

.020

.010

.015

.015

.015

8X8

8X8

8X8

8X8

8X8

8X8

8X12

8X12

8X8

8X8

8X8

8X8

8X8

8X8

6

6

6

7

7

8

88

6

6

6

7

7

8

15

15

15

15

15

15

2020

15

15

15

15

15

15

*

*

*

*

*

MB

H (

3)

AFU

E

86.4

87.0

87.0

87.0

87.0

87.0

--

85.0

85.3

85.0

85.0

85.0

85.0

BurnerInput

Rating AHRI Certified Ratings

Cap

acity

Tank

less

Hea

ter

3.25

3.00

3.75

4.00

4.25

5.50

5.756.00

3.25

3.00

3.75

4.00

4.25

5.50

Dra

w R

atin

g (6

)

Inte

rmitt

ent

WM1801_BRO_049_WTGO

RATINGS

Tapp

ings

*ENERGY STAR® compliant with Version 3.0 Boiler Specification of 87% AFUE only when installed at the reduced burner rate (R) and with the optional vent damper kit (D). Burners shipped with standard rate nozzle, reduced rates achieved through nozzle change-refer to burner instructions or boiler’s rating label for correct selection.

*

In the interest of continual improvements in product and performance, Weil-McLain reserves the right to change specifications without notice.

345/8

201/4