Burnham Alpine Series Supplemental Instructions page 3

TABle S: MODUlAR BOIleR WATeR MANIFOlD SIzING
Boiler
2
Model
ALP080 1¼"
ALP105 1½"
ALP150 2"
ALP210 2"
ALP285 2½"
ALP399 2½"
e.
Gas Piping
1. Refer to National Fuel Gas Code, Local Codes and
Tables 12A and 13 of the Installation, Operating and
Service Instructions for gas pipe sizing.
2. Each boiler must be piped as shown in Figure 26 of
the Installation, Operating and Service Instructions.
WARNING
If gas pressure in the building is above ½ psig,
an additional gas pressure regulator is required.
Using one additional regulator for multiple
boilers may result in unsafe boiler operation.
The additional regulator must be able to properly
regulate gas pressure at the input of the smallest
boiler. If the regulator cannot do this, two or
more additional regulators are required. Consult
regulator manufacturer and/or local gas supplier
for instructions and equipment ratings.
 4
Recommended Minimum Common Water Manifold Size (NPT)
1½" 2"
2" 2"
2" 2½"
2½" 3"
2½" 3"
3" 3
Number of Units
5 6
2½" 2½"
2½" 2½"
2½" 2½"
3" 3½"
3½" 3½"
4" 4"
f.
electrical
1. Each boiler must be provided with a fused
disconnect and service switch.
2. Install wiring in accordance with requirements of
authority having jurisdiction. In the absence of such
requirements, follow the National Electric Code,
NFPA 70 and/or CSA C22.1 Electric Code.
G.
Modular Boiler Control Systems
Contact a controls manufacturer such as Honeywell or
Tekmar to properly apply a modular control system.
Common systems may use outdoor temperature, return
water temperature or both to stage the boilers.
7 8
2½" 2½"
2½" 3"
3" 3½"
4" 4"
4" 5"
5" 5"