Install Instructions

19
4.0 Boiler Piping
4.9 Circulator
The PRESTIGE Solo requires an external circula-
tor to provide circulation through the boiler. The
circulator, when wired directly to the PRESTIGE
Solo, will allow for domestic hot water priority
and provide circulation for the freeze protection
feature of the boiler control. See Graphs 1 through
6 on pages 94 through 96 for pressure drop and
minimum flow rate through the boiler.
4.10 Sizing Primary Piping
See Fig. 9 through 13, pages 21 - 23, for rec-
ommended piping arrangements based on vari-
ous applications. Size the piping and system
components required in the space heating sys-
tem using recognized design methods.
4.11 Domestic Hot Water System Piping
See Fig. 9 through 12 on pages 21-22 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 Solo to the system
piping as shown in Fig. 9 on page 21 when zon-
ing 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 Solo, the boiler supply and
return piping size must be a minimum of 1
inch for the PRESTIGE Solo 80/110, 1-1/4
inch for the PRESTIGE Solo 155/175/250
and 1-1/2 inch for the PRESTIGE Solo299/
399.
4.13 System Piping - Zone Valves
Connect the PRESTIGE Solo to the system pip-
ing as shown in Fig. 10 on page 21 when zoning
with zone valves. The primary / secondary piping
ensures that the boiler loop has sufficient flow.
To ensure an adequate flow rate through
the PRESTIGE Solo, the boiler supply
and return piping size must be a minimum
of 1 inch for the PRESTIGE Solo 80/110,
1-1/4 inch for the PRESTIGE Solo
155/175/250 and 1-1/2 inch for the PRES-
TIGE Solo 299/399.
4.14 System Piping - Through Boiler
In applications in which primary/secondary
arrangement is not utilized, the PRESTIGE Solo
allows this flexibility due to a lower boiler pres-
sure drop, see Graphs 1 through 6 on pages 94
through 96.
Figure 11 on page 22 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 12 on page 22 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-
NOTICE
NOTICE