wtgo - weil-mclain efficiency cast iron boiler provides space and ... side a-wtgo front back...
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WTGO™
GOLD SERIES OIL BOILERWater 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.
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