Vitodens 200-W B2HA 88-150, 311- 530 Technical Data
15
5683 718 - 19
Low-Loss Header Information
Low-Loss Header Application
(continued)
Boiler
Model
No. of
Boilers
Boiler
Max.
Flow
Rate
Total
Flow
Rate
Typical System Flow Rates
Viessmann
Low-loss
Temp.
Sensor
Required
t
*1
°F
(°C)
20
(11)
25
(14)
30
(17)
35
(19.5)
40
(22)
B2HA
112,
399
2
38
(8600)
76
(17200)
System Flow
Rate
LLH Required
LLH Model
GPM
(L/h)
75
(17034)
Yes
200/120
60
(13627)
Yes
200/120
50
(11356)
Yes
200/120
43
(9734)
Yes
200/120
38
(8517)
Yes
160/80
Yes
B2HA
112,
399
3
38
(8600)
114
(25800)
System Flow
Rate
LLH Required
LLH Model
GPM
(L/h)
113
(25552)
Yes
250/150
90
(20441)
Yes
250/150
75
(17034)
Yes
250/150
64
(14601)
Yes
250/150
56
(12776)
Yes
200/120
Yes
B2HA
112,
399
4
38
(8600)
152
(34400)
System Flow
Rate
LLH Required
LLH Model
GPM
(L/h)
150
(34069)
Yes
300/200
120
(27255)
Yes
300/200
100
(22712)
Yes
250/150
86
(19468)
Yes
250/150
75
(17034)
Yes
200/120
Yes
B2HA
112,
399
5
38
(8600)
190
(43000)
System Flow
Rate
LLH Required
LLH Model
GPM
(L/h)
188
(42586)
Yes
300/200
150
(34069)
Yes
300/200
125
(28391)
Yes
300/200
107
(24335)
Yes
250/150
94
(21293)
Yes
250/150
Yes
B2HA
112,
399
6
38
(8600)
228
(51600)
System Flow
Rate
LLH Required
LLH Model
GPM
(L/h)
225
(51103)
Yes
400/200
180
(40882)
Yes
400/200
150
(34069)
Yes
300/200
129
(29202)
Yes
300/200
113
(25552)
Yes
300/200
Yes
B2HA
112,
399
7
38
(8600)
266
(60200)
System Flow
Rate
LLH Required
LLH Model
GPM
(L/h)
263
(59620)
Yes
450/250
210
(47696)
Yes
400/200
175
(39747)
Yes
300/200
150
(34069)
Yes
300/200
131
(29810)
Yes
300/200
Yes
B2HA
112,
399
8
38
(8600)
304
(68800)
System Flow
Rate
LLH Required
LLH Model
GPM
(L/h)
300
(68137)
Yes
450/250
240
(54510)
Yes
400/200
200
(45425)
Yes
400/200
171
(38936)
Yes
300/200
150
(34069)
Yes
300/200
Yes
Sizing of Low-Loss Header in a Commercial Multiple-Boiler Application
Boiler
Model
No. of
Boilers
Boiler
Max.
Flow
Rate
Total
Flow
Rate
Typical System Flow Rates
Viessmann
Low-loss
Temp.
Sensor
Required
t
*1
°F
(°C)
20
(11)
25
(14)
30
(17)
35
(19.5)
40
(22)
B2HA
112,
399
1
38
(8600)
38
(8600)
System Flow
Rate
LLH Required
LLH Model
GPM
(L/h)
37.5
(8517)
Yes
160/80
30
(6814)
Optional
120/80
25
(5678)
Optional
120/80
21.4
(4867)
Optional
120/80
19.5
(4429)
Optional
80/60
Supplied
Sizing of Low-Loss Header in a Residential/Commercial Single-Boiler Application
Note:
for multiple boiler applications when using the Vitodens 200-W, B2HA boilers, refer to the multiple boiler
low-loss distribution manifold installation instructions.
*1 For system
t
<20°F use low-loss header sizes for
t
20°F.
