Piping System To Be Employed; Flow Range Requirement Through Boiler - Burnham ALP105 Installation, Operating And Service Instructions

Piping System To Be Employed.

B.
Alpine (ALP) boilers are designed to operate in a closed
loop pressurized system. Minimum pressure in the
boiler must be 12 PSI. Proper operation of the Alpine
(ALP) boiler requires that the water flow through the
boiler remain within the limits shown in Table 11, any
time the boiler is firing.
Table 11: Flow Range Requirement Through Boiler
Boiler Boiler
Boiler Supply Return
Model Connection, Connection,
Inch, FPT Inch, FPT
ALP080 1
ALP105 1
ALP150 1
ALP210 1
ALP285 1¼ 1¼
ALP399 1½ 1½
Notes: Required Flow (GPM) = ** Output (MBH) * 1000/500 * 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.
20
18
16
14
12
10
8
6
4
2
0
Minimum Boiler
Required Flow
Head Loss,
(GPM)
@ 35°F DT @ 35°F DT
4.2
1
5.5
1
7.9
1
11.1
1
15.1
21.5
Alpine Boiler Head Loss vs. Flow
105
80
0 5 10
Failure to maintain the flow through boiler within
specified limits could result in erratic operation or
premature boiler failure.
1. Near boiler piping must isolate ALP boiler from
system piping via closely spaced tees to insure
specified flow range through boiler any time the
boiler is firing:
Required
Boiler
Flow,
Head Loss,
Ft. (GPM) 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
210
150
15 20
Flow Rate (GPM)
nOTiCE
Required
Boiler
Flow,
Head Loss,
(GPM)
Ft. @ 25°F
@ 25°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
285
399
25 30 35
Maximum Boiler
Required
Head Loss,
Flow (GPM) Ft.
@ 20°F DT @ 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
40