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