Viessmann WB2-44 - Technical Data

Additional Information
46
Technical Data
Rated voltage: 230 VAC
Rated frequency: 60 Hz
Rated current: 2.5 A~
Max. ambient
temperature
H at operation: 32 to 104 ºF
–0 to +40 ºC
H when storing
and transporting: –4 to +149 ºF
–20 to +65 ºC
Setting of adjustable
electronic high limit 167 ºF
75 ºC
Setting of fixed high limit
safety cut-out: 210 ºF
(fixed setting) 99 ºC
Main fuse: max. 16 A
Power consumption
H Burner: max. 105 W
H Control unit: max. 10 VA
Standard heating boiler
Boiler Model Model No. WB2 11-44 WB2 15-60
Natural gas
CSA input
CSA output/DOE
heating capacity
MBH
kW
MBH
kW
55-172
16-50
49-153
14-44
80-230
23-67
71-205
21-60
Net I=B=R rating
*1
MBH 133 178
Propane gas
CSA input
CSA output/DOE
heating capacity
MBH
kW
MBH
kW
55-155
16-45
49-138
14-40
37-112
11-33
33-101
10-30
Net I=B=R rating
*1
MBH 120 166
Min. gas supply pressure
Natural gas
Propane gas
“w.c.
“w.c.
4
11
7
11
Max. gas supply pressure
*2
Natural gas
Propane gas
“w.c.
“w.c.
14
14
14
14
Flue gas
*3
Temperature (at boiler return
water temp. of 86 ºF/30 ºC)
– at rated full load
– at rated partial load
Temperature (at boiler water
return temp. of 140 ºF/60 ºC)
ºF/ºC
ºF/ºC
ºF/ºC
95/35
91/33
149/65
104/40
95/35
158/70
Max. natural gas flow rate ft
3
/h
m
3
/h
172
4.87
230
6.51
Max. propane gas flow rate ft
3
/h
m
3
/h
62
1.75
85.6
2.42
Burner orifices diameter
Natural gas
Propane gas
Ømm
Ømm
(E44) 8.40
(P44) 6.10
(E60) 9.00
(P60) 6.70
*1
Net I=B=R rating based on piping and pick-up allowance of 1.15.
*2
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.
*3
Measured flue gas temperature with combustion air temperature of 68 °F/20 °C.
5285 961 v1.3
Always ensure the correct orifices
are installed in the boiler. See table
below.
The boiler must achieve the output
stated on the rating plate. Do not
overfire the boiler.
WARNING