20
Boiler Piping
System Piping - Through Boiler
In new or retrofit applications in which
primary/secondary arrangement is not utilized, the
PRESTIGE Solo allows this flexibility due to a
lower boiler pressure drop, see Graphs 2 through
7 on pages 91 through 93.
Figure 11, page 22 illustrates a multiple zone
valve system with a single system/boiler circu-
lator. A by-pass loop with a pressure differential
valve must be installed on the system piping.
Figure 12, page 22 illustrates a single zone utiliz-
ing the boiler circulator as the system circulator.
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
temperature back to the boiler in radiant heat-
ing applications.
The design and construction of the PRESTIGE
heat exchanger allows the installation of the boil-
er on systems with non - oxygen barrier tubing.
DO NOT install a SMART tank along
with the PRESTIGE in systems with
non-oxygen barrier tubing. Failure to
comply could result in premature failure
of the SMART tank.
The boiler water supply temperature can be
maintained by the PRESTIGE, eliminating
the need for a mix system to achieve the
desired temperature.
It is recommended for the installer to a high
temperature limit to ensure that the primary
supply temperature does not exceed the max-
imum allowable temperature for the radiant
tubing.
Size the system piping and circulator to pro-
vide the flow needed for the radiant system.
To ensure an adequate flow rate through
the PRESTIGE Solo, the boiler supply
and return piping size must be a mini-
mum of 1 inch for the PRESTIGE Solo 60,
1-1/4 inch for the PRESTIGE Solo
175/250 and 1-1/2 inch for the PRESTIGE
Solo 399.
The addition of the high temperature limit
is important if the PRESTIGE is connect-
ed to a domestic hot water system, which
requires a high primary supply water
temperature.
System Piping - Special Application
If the boiler is used in conjunction with a
chilled water/medium system, the boiler and
chiller must be piped in parallel. Install
flow/check valves to prevent the chilled medi-
um from entering into the boiler.
If the boiler is used to supply hot water to the
heating coils of an air handler where they may
be exposed to chilled air circulation, install
flow/check valves or other automatic means
to prevent gravity circulation of the boiler
water during cooling cycles.
System Piping - Multiple Units Installation
Use a balanced manifold system as the prima-
ry / secondary connection to the space heating
piping as shown in Fig. 13 page 23.
Maintain a minimum of 6 inches [153 mm] of
clearance between units to allow for servicing.
Refer to Figs. 7 and 8 page 19 to install air sep-
arator and expansion tank.
For the space heating piping refer to the appli-
cations mentioned in this manual or use recog-
nized design methods.
CAUTION
NOTICE
NOTICE
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