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103448-10- 6/18
Boiler
Model
Boiler
Supply
Connection,
Inch, FPT
Boiler
Return
Connection,
Inch, FPT
Minimum
Required
Flow (GPM)
@ 35°F ΔT
Boiler
Head Loss,
Ft.
@ 35°F ΔT
Required
Flow,
(GPM)
@ 30°F ΔT
Boiler
Head Loss,
Ft.
@ 30°F ΔT
Required
Flow,
(GPM)
@ 25°F ΔT
Boiler
Head Loss,
Ft.
@ 25°F ΔT
Maximum
Required
Flow (GPM)
@ 20°F ΔT
Boiler
Head Loss,
Ft.
@ 20°F ΔT
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
Notes: Required Flow (GPM) = ** Output (MBH) x 1000/500 x ΔT
**
Output (MBH) - Select Value for specific Boiler Model from Table 2
.
See also Table 13 for near boiler piping sizing. Using boiler
antifreeze will result in higher fluid density and may require larger circulators.
Table 12: Flow Range Requirement Through Boiler
VI. Water Piping and Trim
(continued)
d. In replacement installations, it may be
nearly impossible to get an accurate
measurement of piping amount and number
of fittings in the system. If system is zoned,
the system flow rate may drop well below
recommended minimum flow when only a
single zone is calling for heat.
80
105
150
210
285
0
2
4
6
8
10
12
14
0
5
10
15
20
25
Pr
es
sur
e D
rop
(F
ee
t of
H
ead)
Flow Rate (GPM)
Pressure Drop vs. Flow
The 10th digit of the Alpine boiler part number in-
dicates the brand of boiler circulator included with
the boiler. A “T” in the 10th digit of the part number
indicates a Taco circulator; a “G” indicates a Grundfos
circulator.
Example:
Boiler part number: ALP105BW-2T02 indicates Alpine
boiler equipped with Taco Circulator
Boiler part number: ALP105BW-2G02 indicates Alpine
boiler equipped with Grundfos Circulator
3. Alpine boiler models ALP080B through
ALP285B are factory supplied with
circulators,
which were sized for near-boiler
piping equivalent length of 50 ft. and listed
temperature differential. See Table 13 for
details.
It is the installer’s responsibility to insure a
proper installation and where applicable,
proper circulator speed setting for the
boiler circulator to achieve a required flow
rate. Where near-boiler piping exceeds 50
equivalent feet, alternate circulator selection
may be required.
Summary of Contents for Alpine ALP080B
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Page 77: ...103448 10 6 18 77 VIII Electrical continued Figure 27 Wiring Connection Diagram...
Page 78: ...78 103448 10 6 18 Figure 28 Ladder Diagram VIII Electrical continued...
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