Burnham ALP080 Manuel D’Utilisation

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iX.  Boiler Stacking
 
For installations with unusually high space heating 
and/or domestic hot water heating loads, where employing 
two (2) Alpine (ALP) boilers will offer the benefits of 
greater operational efficiency, floor space savings and boiler 
redundancy, the Alpine (ALP) boilers may be installed 
stacked one on the top of the other.  Refer to Table 18 
“Alpine (ALP) Boiler Model Stacking Combinations” for 
details.
Table 18:  alpine (aLP) Boiler Model
                 Stacking Combinations
Bottom Boiler Model
Top Boiler Model
ALP080
ALP080
ALP105
ALP080
ALP105
ALP150
ALP080
ALP105
ALP150
ALP210
ALP080
ALP105
ALP150
ALP210
ALP285
ALP080
ALP105
ALP150
ALP285
ALP399
ALP080
ALP105
ALP150
ALP210
ALP285
ALP399
A.
 
To field assemble individual Alpine (ALP) boilers 
into a stackable configuration, use the steps below:
1.   Position the bottom boiler first. Refer to Sections II 
“Pre-Installation” and III “Unpacking Boiler” of the 
manual for details.  
Always position higher input 
boiler model as bottom boiler.
2.   Each Alpine (ALP) boiler is factory packaged with 
two (2) Stacking Boiler Attachment Brackets (P/N 
101679-01) and the bracket mounting hardware [six 
(6) self-drilling hex washer head plated #8 x ½” 
long screws, P/N 80860743].  Locate and remove 
the brackets and the hardware.  The Stacking Boiler 
Attachments Bracket has three 7/32” diameter holes 
punched in a triangular pattern.  See Figure 39 
“Stacking Boiler Attachment Bracket Placement”.
3.   Alpine (ALP) boiler left and right side panels have 
a series of dimples at panel top and bottom.  These 
dimples are positioning dimples for Stacking Boiler 
Attachment Bracket mounting screws.  Side panel 
bottom positioning dimples are evenly spaced 
from boiler front and back, while side panel top 
positioning dimples follow specific pattern to 
compensate for Alpine (ALP) boiler model variable 
depth.
4.   Position the upper boiler on the top of the bottom 
boiler and align boiler front doors and sides flush 
with each other.  
•  Place first Stacking Boiler Attachment Bracket 
onto the upper boiler left side panel, at the panel 
lower left corner and align bracket two upper 
holes with corresponding side panel lower 
dimples.
•  The remaining lower bracket hole must align 
with a matching bottom boiler left side panel top 
positioning dimple.  
•  Once bracket holes and side panel dimple 
alignment is verified, attach the bracket to top 
and bottom boiler left side panels with the 
mounting screws.
5.   Repeat above procedure to install second Stacking 
Boiler Attachment Bracket and secure the stacked 
boiler right side panels together at the front right 
corner.
6.   Install the third Stacking Boiler Attachment Bracket 
to secure top and bottom boiler left side panels at 
the rear left corner.  Align the bracket holes with 
corresponding positioning dimples in the top boiler 
and bottom boiler left side panels, then secure 
bracket with the screws.
7.   Repeat above procedure to install the forth Stacking 
Boiler Attachment Bracket to secure stacked boiler 
right side panels at the rear right corner.
B.
  When installing stackable boiler combinations 
observe the following guidelines:
1.  Venting - Top and bottom boilers must have their 
individual concentric vent piping and vent terminals.
WaRning
no common manifolded venting is permitted.
 
For side-wall venting individual model vent 
terminals must terminate not closer than 12 
inches horizontally and three (3) feet vertically 
from each other in order to prevent combustion 
air contamination.  For vertical through the roof 
venting, individual vertical vent terminals, if level 
with each other, must be spaced no closer than 12 
inches horizontally.  If vertical terminals cannot end 
in one plane, they must be spaced no closer than 
three (3) feet horizontally.
 
Chimney chase concentric venting is permitted for 
modules, when stackable, providing concentric