Multiple Boiler Piping - Benefits And Installaton Rules; Multiple Boiler / Water Heater Piping Concept – Concept Drawing - IBC DC Series Installation And Operating Instructions Manual

NOTE
The piping drawings in this
manual are simple schematic
guides to a successful
installation. There are many
necessary components not
shown, and details such as
thermal traps are left out so
the drawings have greater
clarity. We require that our
boilers / water heaters be
installed by licensed and
experienced trades people
who are familiar with the
applicable local and national
codes. System design is to be
completed by an experienced
hydronic designer or
Engineer. It is necessary to
carefully read and follow
these installation instructions
along with the application
drawing that fits your system.
INSTALLATION
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
MULTIPLE BOILER PIPING - BENEFITS AND INSTALLATION RULES
Multiple IBC DC Series boilers / water heaters can be installed in a single heating
system to provide redundancy, increased output, and greater heating plant turn-
down capabilities. Primary/Secondary piping must be employed. This approach
provides constant head and flow at each boiler, regardless of flow variations in
the main building loop.
Each boiler / water heater will control its own pump, turning it off or on when
heat is required. This approach saves electricity by reducing the pumping
power required as load conditions are reduced. A multiple boiler system can be
Figure 26: Multiple boiler / water heater piping concept – concept drawing. This drawing is
only a simple schematic guide.
controlled by installing an external boiler staging controller with dry contacts for
each boiler / water heater. These controllers are available from your local heating
wholesaler.
Check valves are to be used in each boilers piping to prevent reverse flow when
the boiler is off.
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