Additional Information
74
Technical Data
Boiler Model
Model No. WB2B-
80
105*
A
Natural gas / Liquid propane gas
CSA input
CSA output/DOE
*1
heating capacity
MBH
kW
MBH
kW
104-285
30-83
95-260
28-76
104-370
30-108
98-350
29-103
Net I=B=R rating
*2
MBH
226
304
Heat exchanger surface area
ft.
2
m
2
28.88
2.68
28.88
2.68
Min. gas supply pressure
Natural gas
Liquid propane gas
“w.c.
“w.c.
4
10
4
10
Max. gas supply pressure
*3
Natural gas
Liquid propane gas
“w.c.
“w.c.
14
14
14
14
A.F.U.E.
%
96.1
CSA thermal efficiency
ANSI Z21.13/CSA 4.9
%
94.5
Weight
lbs
kg
225
102
225
102
Boiler water content
USG
ltr
3.4
12.8
3.4
12.8
Boiler max. flow rate
*4
GPM
ltr/h
35.2
8000
35.2
8000
Max. operating pressure
at 210ºF / 99ºC
psig
bar
60
4
60
4
Boiler water temperature
– Adjustable high limit (AHL)
range
space heating
(steady state)
DHW production
– Fixed high limit (FHL)
ºF/
ºC
ºF/
ºC
ºF/ºC
68 to 176 /
20 to 80
176 /
80
210/99
Boiler connections
Boiler heating supply and return NPTM “
Pressure relief valve
NPTF “
Drain valve
(male
thread)
Boiler supply/return for
indirect-fired DHW storage tank NPT”
(field supplied)
Gas valve connection, NPTF
1¼
¾
¾
1¼
1
1¼
¾
¾
1¼
1
*
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.
5
4
4
3
2
0
7
v
1
.5
