Install Instructions

103448-02 - 6/13 17
H. Boiler Stacking
1. For installations with unusually high space heating
and/or domestic hot water heating loads, where
employing two (2) Alpine (ALP) boilers will offer
the benets of greater operational efciency, oor
space savings and boiler redundancy, the Alpine
(ALP) boilers may be installed stacked one on the
top of the other. Refer to Table 3 “Alpine (ALP)
Boiler Model Stacking Combinations” for details.
Table 3: Alpine (ALP) Boiler Model Stacking
Combinations
Bottom
Boiler Model
Top Boiler Model
(2)
ALP080B
(1)
ALP080B
ALP105B
(1)
ALP080B or ALP105B
ALP150B
(1)
ALP080B thru ALP150B
ALP210B
(1)
ALP080B thru ALP210B
ALP285B ALP080B, ALP105B, ALP150B & ALP285B
ALP399 ALP080B thru ALP399
Notes:
(1)
Floor-mounted builds only
(2)
Floor-mounted or wall-mounted build where applicable
2. To eld assemble individual Alpine (ALP) boilers
into a stackable conguration, use the steps below:
a. Position the bottom boiler rst. Refer to Sections
II “Unpacking Boiler” and III “Pre-Installation
& Boiler Mounting” of the manual for details.
Always position higher input boiler model as
bottom boiler.
b. 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 3 “Stacking
Boiler Attachment Bracket Placement”.
c. 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
specic pattern to compensate for Alpine (ALP)
boiler model variable depth.
d. Position the upper boiler on the top of the bottom
boiler and align boiler front doors and sides ush
with each other.
• Place rst 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 veried, attach the bracket to
top and bottom boiler left side panels with
the mounting screws.
e. Repeat above procedure to install second
Stacking Boiler Attachment Bracket and secure
the stacked boiler right side panels together at
the front right corner.
f. 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.
g. Repeat above procedure to install the forth
Stacking Boiler Attachment Bracket to secure
stacked boiler right side panels at the rear right
corner.
3. When installing stackable boiler combinations
observe the following guidelines:
a. Venting - Top and bottom boilers must have their
individual 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 vertical (roof) vent terminals, if level
with each other, are spaced no closer then 12
inches horizontally.
If vertical vent terminals cannot end in one
plane, they must be spaced no closer then three
(3) feet horizontally.
Follow instructions in Section IV “Venting”
of the manual for specics of individual boiler
vent termination. Follow instructions in Section
V “Condensate Disposal” for each individual
boiler ue gas condensate line construction and
III. Pre-Installation and Boiler Mounting H. Boiler Stacking (continued)