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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
25
88,
(5700)
(5700)
311
Sizing of Low-Loss Header in a Commercial Multiple-Boiler Application
Boiler
No. of
Boiler
Model
Boilers
Max.
Flow
Rate
B2HA
2
25
88,
(5700)
(11400)
311
B2HA
3
25
88,
(5700)
(17100)
311
B2HA
4
25
88,
(5700)
(22800)
311
B2HA
5
25
88,
(5700)
(28500)
311
B2HA
6
25
88,
(5700)
(34200)
311
B2HA
7
25
88,
(5700)
(39900)
311
B2HA
8
25
88,
(5700)
(45600)
311
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.
Total
Typical System Flow Rates
Flow
Rate
t
*1
(°C)
25
System Flow
GPM
Rate
(L/h)
LLH Required
LLH Model
Total
Typical System Flow Rates
Flow
Rate
t
*1
(°C)
50
System Flow
GPM
Rate
(L/h)
LLH Required
LLH Model
75
System Flow
GPM
Rate
(L/h)
LLH Required
LLH Model
100
System Flow
GPM
Rate
(L/h)
LLH Required
LLH Model
125
System Flow
GPM
Rate
(L/h)
LLH Required
LLH Model
150
System Flow
GPM
Rate
(L/h)
LLH Required
LLH Model
175
System Flow
GPM
Rate
(L/h)
LLH Required
LLH Model
200
System Flow
GPM
Rate
(L/h)
LLH Required
LLH Model
°F
20
25
(11)
(14)
29.4
23.52
(6677)
(5341)
Yes
Optional
120/80
120/80
°F
20
25
(11)
(14)
58.8
47.04
(13353)
(10683)
Yes
Yes
200/100
200/100
88.2
70.56
(20030)
(16024)
Yes
Yes
250/150
200/120
117.6
94.08
(26707)
(21366)
Yes
Yes
250/150
250/150
147
117.6
(33384)
(26707)
Yes
Yes
300/200
250/150
176.4
141.12
(40060)
(32048)
Yes
Yes
300/200
300/200
205.8
164.64
(46737)
(37390)
Yes
Yes
400/200
300/200
235.2
188.16
(53414)
(42731)
Yes
Yes
400/200
300/200
Low-Loss Header Information
30
35
40
(17)
(19.5)
(22)
19.6
16.8
14.7
(4451)
(3815)
(3338)
Optional
Optional
Optional
80/60
80/60
80/60
30
35
40
(17)
(19.5)
(22)
39.2
33.6
29.4
(8902)
(7631)
(6677)
Yes
Yes
Yes
160/80
160/80
120/80
58.8
50.4
44.1
(13353)
(11446)
(10015)
Yes
Yes
Yes
200/120
200/120
160/80
78.4
67.2
58.8
(17805)
(15261)
(13353)
Yes
Yes
Yes
200/120
200/120
200/120
98
84
73.5
(22256)
(19076)
(16692)
Yes
Yes
Yes
250/150
250/150
200/120
117.6
100.8
88.2
(26707)
(22892)
(20030)
Yes
Yes
Yes
250/150
250/150
250/150
137.2
117.6
102.9
(31158)
(26707)
(23369)
Yes
Yes
Yes
300/200
250/150
250/150
156.8
134.4
117.6
(35609)
(30522)
(26707)
Yes
Yes
Yes
300/200
300/200
250/150
Viessmann
Low-loss
Temp.
Sensor
Required
Supplied
Viessmann
Low-loss
Temp.
Sensor
Required
Yes
Yes
Yes
Yes
Yes
Yes
Yes
13
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