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Burnham ALP150 User Manual

Page 34

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Table 12a: Recommended Circulator Models for alpine (aLP) Boilers Based on 25°F Temperature Differential

and Up to 75 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

ALP080

1

1

1

1

5.8

10.3

Taco 0010

Grundfos UPS

15-58 FRC

ALP105

1

1

1

1

7.7

15.1

Taco 0014

Grundfos UPS

26-99 FC (second speed)

ALP150

1

1

1

1

11.0

13.1

Taco 0014

Grundfos UP

26-99 FC (first speed)

ALP210

1

1

15.5

12.7

Taco 0014

Grundfos UP

26-99 FC (first speed)

ALP285

21.5

13.0

Taco 0013

Grundfos UP

26-99 FC (third speed)

ALP399

2

2

30.2

12.0

Taco 1400-20

Grundfos UPS

32-80/2 F (second speed)

notes:
* Circulator Models shown are not equipped with internal flow check valve (IFC).

When selecting Circulators with IFC 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.

a. The flow rate through the isolated near-boiler

loop is maintained by factory recommended and
installer supplied boiler circulator.

b. The flow rate through the isolated near-boiler

loop

is completely independent of the flow rate

through the heating system loop(s).

c. The flow rate through the heating system loop(s)

is controlled by installer sized/provided system
loop circulator(s).

d. This piping arrangement can be used either for

space heating-only applications or space heating
with indirect water heater(s) applications.
i.

Space heating only - refer to Table 12A and
Figures 31A or 31B “Near Boiler Piping
- Heating Only” as applicable.

ii. Space heating plus indirect water

heater(s) - refer to Tables 12A, 12B and, as
applicable, to:

• Figures 32A or 32B “Near Boiler Piping -

Heating Plus Indirect Water Heater”

- when indirect water heater can be piped

as part of near-boiler piping.

• Figures 32C or 32D “Near Boiler Piping -

Heating Plus Indirect Water Heater”

- when indirect water heater must be
piped as a separate heating zone off the
system header.

e. For installations where indirect domestic hot

water heater is combined with space heating,
when sizing an indirect water heater circulator,

compare the specified flow range through an
Alpine model boiler to an indirect water heater

(Alliance SL™) model coil flow rate required to
achieve water heater rating. Refer to Table 12B.

f. When Alliance SL™ model coil flow rate,

required to achieve water heater rating, falls

within the specified flow range for Alpine
boiler model, the Alliance SL™ model can be
piped as part of Alpine near-boiler piping
.
Refer to Table 12B, Figures 32A, 32B, 35 and 36
for recommended circulator models, piping and
wiring details.

g. When Alliance SL™ model coil flow rate,

required to achieve water heater rating,

exceeds the specified flow range for Alpine
boiler model, the Alliance SL™/Alpine boiler
combination may result in excessive noise and
boiler heat exchanger erosion, and therefore,
is not recommended. Refer to Table 12B for
details.

h. When Alliance SL™ model coil flow rate,

required to achieve water heater rating, falls

below the specified flow range for Alpine boiler
model, the Alliance SL™ model must be piped

as a separate heating zone off the system
header
. The circulator must be sized based on

the Alliance SL™ model coil flow and combined
coil pressure drop and the zone piping total
equivalent length. Refer to Table 12B, Figures

32C, 32D, 37A and 37B for piping and wiring
details.

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