Full Product Manual

4.0 Boiler Piping
664A0100 - Rev. A
The circulator, when wired directly to the PRES-
TIGE Excellence, will allow for domestic hot
water priority and provide circulation for the
freeze protection feature of the boiler control. See
Graph 1 on page 78 for pressure drop and mini-
mum flow rate through the boiler.
4.10 Sizing Primary Piping
See Fig. 7 through 10, pages 20 - 21, for recom-
mended piping arrangements based on various
applications. Size the piping and system com-
ponents required in the space heating system
using recognized design methods.
4.11 Domestic Hot Water System Piping
See Fig. 7 through 10, pages 20 - 21 for recom-
mended piping to a DHW system. This recom-
mended piping configuration ensures priority is
given to the production and recovery of the DHW.
The piping for the DHW is separate from the
boiler system piping and does not require a pri-
mary / secondary piping configuration.
To wire the DHW circulator to the boiler control
module, reference Section VIII - External Wiring.
4.12 System Piping - Zone Circulators
Connect the PRESTIGE Excellence to the sys-
tem piping as shown in Fig. 7 on page 20 when
zoning with zone circulators.
The installer must provide a separate circulator
for each zone of space heating as well as the
boiler circulator.
To ensure an adequate flow rate through
the PRESTIGE Excellence, the boiler sup-
ply and return piping size must be a mini-
mum of 1 inch.
4.13 System Piping - Zone Valves
Connect the PRESTIGE Excellence to the system
piping as shown in Fig. 11 on page 20 when zon-
ing with zone valves. The primary / secondary
piping ensures that the boiler loop has sufficient
flow.
To ensure an adequate flow rate through
the PRESTIGE Excellence, the boiler sup-
ply and return piping size must be a mini-
mum of 1 inch.
4.14 System Piping - Through Boiler
In applications in which primary/secondary
arrangement is not utilized, the PRESTIGE
Excellence allows this flexibility due to a lower
boiler pressure drop, see Graph 1 on pages 78.
Figure 9 on page 21 illustrates a multiple zone
valve system with a single system/boiler circula-
tor. A by-pass loop with a pressure differential
valve must be installed on the system piping.
Figure 10 on page 21 illustrates a single zone uti-
lizing the boiler circulator as the system circulator.
4.15 System Piping - Radiant Heating
The heat exchanger design of the PRESTIGE
allows operation in a condensing mode. This
feature requires no regulation of the return tem-
perature back to the boiler in radiant heating
applications.
The design and construction of the PRESTIGE
heat exchanger allows the installation of the boiler
on systems with non - oxygen barrier tubing.
NOTICE
NOTICE
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