TriangleTube 399 Solo - Manual (Page 25)

19
Boiler Piping
System Piping - Zone Valves
Connect the PRESTIGE Solo to the system pip-
ing as shown in Fig. 10 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 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.
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 75 through 77.
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
Solo allows operation in a condensing mode.
This feature requires no regulation of the return
water temperature back to the boiler in radiant
heating applications.
The boiler water supply temperature can be
maintained by the PRESTIGE Solo, eliminat-
ing the need for a mix system to achieve the
desired temperature.
It is recommended for the installer to add a
high temperature limit as shown in Fig.13 page
23. This will ensure that the primary supply
temperature does not exceed the maximum
allowable temperature for the radiant tubing.
The addition of the high temperature
limit is important if the PRESTIGE Solo
is connected to a domestic hot water sys-
tem, which requires a high primary sup-
ply water temperature.
Size the system piping and circulator to provide
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 PRES-
TIGE Solo 399.
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. 14 page 24.
Maintain a minimum of 6 inches [153 mm] of
clearance between units to allow for servicing.
Refer to Figs. 6 and 7 page 18 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.
NOTICE
NOTICE
BEST PRACTICE