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Additional Information
Technical Data
Boiler Model
Model No. WB2B-
Natural gas / Liquid propane gas
CSA input
*1
CSA output/DOE
heating capacity
*2
Net I=B=R rating
Heat exchanger surface area
Min. gas supply pressure
Natural gas
Liquid propane gas
*3
Max. gas supply pressure
Natural gas
Liquid propane gas
A.F.U.E.
CSA thermal efficiency
ANSI Z21.13/CSA 4.9
Weight
Boiler water content
*4
Boiler max. flow rate
Max. operating pressure
at 210ºF / 99ºC
Boiler water temperature
– Adjustable high limit (AHL)
range
space heating
(steady state)
DHW production
– Fixed high limit (FHL)
Boiler connections
Boiler heating supply and return NPTM "
Pressure relief valve
Drain valve
Boiler supply/return for
indirect-fired DHW storage tank NPT"
(field supplied)
Gas valve connection, NPTF
A
*
For high altitude installations (5,000 - 10,000 ft.), the input for model WB2B 105 will have an altitude de-ration of 14% for 5,000 ft.
and 28% for 10,000 ft. (average of 2.8% / 1,000 ft.).
*1
Output based on 140ºF / 60ºC, 120ºF / 49ºC system supply/return temperature.
*2
Net I=B=R rating based on piping and pick-up allowance of 1.15.
*3
If the gas supply pressure exceeds the maximum gas supply pressure value, a separate gas pressure regulator must be installed upstream of the
heating system.
*4
See "Typical System Flow Rates" in the Vitodens 200-W, WB2B Installation Instructions.
74
MBH
kW
MBH
kW
MBH
2
ft.
2
m
"w.c.
"w.c.
"w.c.
"w.c.
%
%
lbs
kg
USG
ltr
GPM
ltr/h
psig
bar
ºF/
ºC
ºF/
ºC
ºF/ºC
NPTF "
(male
thread)
80
104-285
30-83
95-260
28-76
226
28.88
2.68
4
10
14
14
96.1
225
102
3.4
12.8
35.2
8000
60
4
68 to 176 /
20 to 80
176 /
80
210/99
1¼
¾
¾
1¼
1
A
105*
104-370
30-108
98-350
29-103
304
28.88
2.68
4
10
14
14
94.5
225
102
3.4
12.8
35.2
8000
60
4
1¼
¾
¾
1¼
1
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