Burnham ALPINE Installation, Operation And Service Instructions page 43

Vi. Water Piping and Trim (continued)
Table 11: Flow Range Requirement Through Boiler
Boiler Boiler
Boiler Supply Return
Connection, Connection,
Model
Inch, FPT Inch, FPT
ALP080 1
ALP105 1
ALP150 1
ALP210 1
ALP285 1¼
1½
ALP399
1½
ALP500
Notes: Required Flow (GPM) = ** Output (MBH) x 1000/500 x DT
** Output (MBH) - Select Value for specific Boiler Model from Tables 2A or 2B
Using boiler antifreeze will result in higher fluid density and may require larger circulators.
Minimum Boiler
Required Flow
Head Loss,
(GPM)
@ 35°F DT @ 35°F DT
1 4.2
1 5.5
1 7.9
1 11.1
1¼ 15.1
1½
21.5
1½
27.0
Alpine Boiler Head Loss vs. Flow
25
20
105
15
10
150
5
80
0
0 5 10 15
Required
Boiler Head
Flow,
Loss,
(GPM)
Ft. Ft.
@ 30°F DT @ 30°F DT
4.8 4.9 6.4
7.0 6.4 9.3
5.2 9.2 6.6
5.4 12.9 7.1
5.9 17.7 7.8
6.1 25.1 7.9
6.8 31.5 8.8
285
399
210
20 25 30
Flow Rate (GPM)
Required
Maximum
Flow,
Boiler Head
Required
(GPM)
Loss, Ft. @
Flow (GPM)
@ 25°F 25°F DT
@ 20°F DT
DT
5.8 8.9
7.7 12.8
11.0 8.9
15.5 9.8
21.2 10.7
30.2 10.8
37.8 12.0
500
35 40 45 50
Boiler
Head Loss,
Ft.
@ 20°F DT
7.3 13.4
9.6 19.1
13.8 12.7
19.4 14.4
26.5 16.0
37.7 15.9
47.2 17.4