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permissible, providing common pipe has sufcient
ow capacity to handle combined condensate
volume of stackable combination.
2. Gas Piping - Follow instructions in Section VII “Gas
Piping” of the manual for sizing and installation
of an individual boiler. When common gas piping
is sized, insure it will have adequate capacity for
combined input (GPH gas ow) of the selected
stackable boiler combination.
Figure 38: Stacking Boiler Attachment Bracket Placement
3. Water Piping and Trim - Follow instructions in
Section VI “Water Piping and Trim” of the manual
for system piping and boiler secondary piping
selection/sizing based on combined heating
capacity and/or gross output of the selected
stackable boiler combination. Follow instructions
of Section VI “Water Piping and Trim” for each
individual boiler trim installation.
4. Electrical - Follow instructions in Section VIII
“Electrical” of the manual to wire individual boilers.
IX. Boiler Stacking (continued)
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