Alpine Installation, Operating, and Service Instructions

54 103448-02 - 6/13
Boiler
Model
Boiler
Supply
Connection,
Inch, FPT
Boiler
Return
Connection,
Inch, FPT
Minimum
Required
Flow (GPM)
@ 35°F DT
Boiler
Head Loss,
Ft.
@ 35°F DT
Required
Flow,
(GPM)
@ 30°F DT
Boiler
Head Loss,
Ft.
@ 30°F DT
Required
Flow,
(GPM)
@ 25°F DT
Boiler
Head Loss,
Ft.
@ 25°F DT
Maximum
Required
Flow (GPM)
@ 20°F DT
Boiler
Head Loss,
Ft.
@ 20°F DT
ALP080B 1 1 4.2 4.8 4.9 6.4 5.8 8.9 7.3 13.4
ALP105B 1 1 5.5 7.0 6.4 9.3 7.7 12.8 9.6 19.1
ALP150B 1 1 7.9 5.2 9.2 6.6 11.0 8.9 13.8 12.7
ALP210B 1 1 11.1 5.4 12.9 7.1 15.5 9.8 19.4 14.4
ALP285B 1¼ 1¼ 15.1 5.9 17.7 7.8 21.2 10.7 26.5 16.0
ALP399 1½ 1½ 21.5 6.1 25.1 7.9 30.2 10.8 37.7 15.9
Notes: Required Flow (GPM) = ** Output (MBH) x 1000/500 x DT
** Output (MBH) - Select Value for specic Boiler Model from Tables 2A or 2B
Using boiler antifreeze will result in higher uid density and may require larger circulators.
Table 16: Flow Range Requirement Through Boiler
Alpine Boiler Head Loss vs. Flow
80
105
150
210
285
399
500
0
5
10
15
20
25
0 5 10 15 20 25 30 35 40 45 50
Flow Rate (GPM)
Boiler Head Loss (Feet)
VI. Water Piping and Trim B. Piping System To Be Employed (continued)
2. Direct connection of Alpine (ALP) boiler to
heating system, similar to a conventional boiler, is
NOT RECOMMENDED because:
a. The ow rate through system must be the same
as through boiler and fall within limits specied
in Table 16.
b. Pressure drop through entire system must be
known, added to pressure drop through boiler,
and, a circulator selected to provide required
ow at total calculated pressure drop.
c. It is often very difcult to accurately calculate
the pressure drop through the system.
d. In replacement installations, it may be nearly
impossible to get an accurate measurement of
piping amount and number of ttings in the
system. If system is zoned, the system ow rate
may drop well below recommended minimum
ow when only a single zone is calling for heat.