Alpine Installation, Operating, and Service Instructions

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Table 17: Recommended Circulator Models for Alpine (ALP) Boilers Based on Listed Temperature Differential
and 50 ft. Equivalent Length Near-Boiler Piping - Space Heating Circulator
Boiler
Model
Boiler Supply
Connection,
Inch, FPT
Boiler
Return
Connection,
Inch, FPT
Near-Boiler
Piping
Supply Pipe
Size, Inch
Near-Boiler
Piping
Return Pipe
Size, Inch
Flow, GPM
@ 25°F
Temp.
Differential
Combined
Boiler &
Piping Loop
Head Loss, Ft.
Recommended
Circulator
Make & Model
ALP080B 1 1 1 1 7.3
(1)
14.7
Taco 0015 (Speed 3)
(2)
Grundfos UPS
15-58 FRC (Speed 2)
ALP105B 1 1 1 1 7.7 14.3
Taco 0015 (Speed 3)
(2)
Grundfos UPS
26-99 FC (Speed 1)
ALP150B 1 1 1 1 11.0 11.7
Taco 0015 (Speed 3)
(2)
Grundfos UP
26-99 FC (Speed 2)
ALP210B 1 1 1¼ 1¼ 15.5 11.7
Taco 0014
(2)
Grundfos UP
26-99 FC (Speed 2)
ALP285B 1¼ 1¼ 1½ 1½ 21.5 12.3
Taco 0011
(2)
Grundfos UP
26-99 FC (Speed 3)
ALP399 1½ 1½ 2 2 30.2 11.6
Taco 2400-20
(2) (3)
Grundfos UPS
26-150 F/SF (Speed 2)
Notes:
(1)
Temperature Differential = 20°F
(2)
Taco Circulators shown are not equipped with internal ow check valve (IFC).
(3)
Circulators are not supplied with boiler.
When selecting Circulators other than recommended, contact Circulator Manufacturer for sizing information.
Near-Boiler Piping Size shown is based on 2 to 5.5 Ft/Sec. velocity range to avoid potential noise and pipe erosion.
VI. Water Piping and Trim B. Piping System To Be Employed (continued)
The 10th digit of the Alpine boiler part number indicates 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
C. Standard Installation Requirements
Observe the following guidelines when making the
actual installation of the boiler piping:
1. Safety Relief Valve (Required) - The relief valve is
packaged loose with boiler and must be installed in
the location shown in Figure 36 “Factory Supplied
Piping and Trim Installation”. The relief valve must be
installed with spindle in vertical position. Installation
of the relief valve must comply with ASME Boiler and
Pressure Vessel Code, Section IV. The standard factory
shipped relief valve is rated for 30 PSI maximum
working pressure for ALP080B thru ALP285B and
50 PSI for ALP399. Optional 50 PSI, 80 PSI and 100
PSI maximum working pressure rated relief valves are
available. If the valve is to be replaced, the replacement
valve must have a relief capacity equal or exceeding
the boiler DOE Heating Capacity (models ALP080B
thru ALP285B) or the boiler AHRI Gross Output rating
(model ALP399 only). Pipe the relief valve discharge
to a location where hot water or steam will not create
hazard or property damage if the valve opens. The end
3. Alpine boiler models ALP080B thru ALP285B are
factory supplied with circulators, which were sized
for near-boiler piping equivalent length of 50 ft.
and listed temperature differential. See Table 17 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 ow rate. Where near-boiler piping
exceeds 50 equivalent feet, alternate circulator
selection may be required.