Burnham ALPINE Installation, Operation And Service Instructions page 44

Vi. Water Piping and Trim (continued)
Table 12: 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 Supply
Boiler
Connection,
Model
Inch, FPT
ALP080 1
ALP105 1
ALP150 1
ALP210 1
ALP285 1¼
1½
ALP399
1½
ALP500
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.
nOTiCE
Where it is not possible to install a separate
boiler loop, the system circulator must be
sized to ensure that the flow through boiler
stays within the defined parameters to prevent
overheating when the boiler is fired at it's full
rated input. Install a flow meter to measure the
flow, or fire the boiler at full rate and ensure the
boiler DT does not exceed 5°F.
2. Direct connection of Alpine (ALP) boiler to
heating system, similar to a conventional boiler, is
NOT RECOMMENDED because:
a. The flow rate through system must be the same
as through boiler and fall within limits specified
in Table 11.
b. Pressure drop through entire system must be
known, added to pressure drop through boiler,
and, a circulator selected to provide required
flow at total calculated pressure drop.
c. It is often very difficult 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 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.

Near-Boiler
Boiler Return
Piping Supply
Connection,
Pipe Size,
Inch, FPT
Inch
1 1
1 1
1 1
1 1¼
1½
1¼
1½
2
1½
2
Near-Boiler
Flow, GPM
Piping Return
@ 25°F Temp.
Pipe Size,
Differential
Inch
1 5.8
1 7.7
1 11.0
1¼ 15.5
1½
21.5
2 30.2
2 37.8
C
. Piping Standard Installation Requirements.
Observe the following guidelines when making the
actual installation of the boiler piping:
1. Pressure Relief Valve (Required) - The relief
valve is packaged loose with boiler and must
be installed in the location shown in Figure 30
"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 ALP080 thru ALP285 and 50 PSI for
ALP399 and ALP500. 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 ALP080 thru ALP285) or the boiler I=B=R
Gross Output rating (model ALP399 and ALP500).
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 of the discharge
pipe must terminate in an unthreaded pipe. If the
relief valve is not piped to a drain, it must terminate
at least 6" above the floor. Do not run relief valve
discharge piping through an area prone to freezing.
The termination of discharge piping must be in an
area where it will not become plugged by debris.
Combined Boiler
* Recommended Circulator
& Piping Loop
Make & Model
Head Loss, Ft.
Taco 0010
10.3 Grundfos UPS
15-58 FRC
Taco 0014
15.1 Grundfos UPS
26-99 FC (second speed)
Taco 0014
13.1 Grundfos UP
26-99 FC (first speed)
Taco 0014
12.7 Grundfos UP
26-99 FC (first speed)
Taco 0013
13.0 Grundfos UP
26-99 FC (third speed)
Taco 1400-20
12.0 Grundfos UPS
32-80/2 F (second speed)
Taco 1400-30
Grundfos UPS
32-80/2 F (third speed)
13.9
40-80/2 F (second speed)
or