TriangleTube 399 Solo - Manual (Page 23)

Boiler Piping
The expansion tank must be located as shown
in Fig. 6 and Fig. 7 on page 18 when using a
primary/secondary piping arrangement or as
per recognized design methods. Refer to the
expansion tank manufacturer instructions for
additional installation details.
Connect the expansion tank to an air separator
only if the air separator is located on the suc-
tion side (inlet) of the system circulator.
Always locate and install the system fill con-
nection at the same location as the expansion
tank connection to the system.
Diaphragm Expansion Tank
Always install an automatic air vent on the top
of the air separator to remove residual air from
the system.
Closed-Type Expansion Tank
It is recommended to pitch any horizontal pip-
ing upwards toward the expansion tank 1 inch
per 5 feet of piping. Use 3/4” piping for the
expansion tank to allow air within the system
to rise.
DO NOT install automatic air vents on a
closed-type expansion tank system. Air
must remain in the system and be
returned to the expansion tank to pro-
vide an air cushion. An automatic air
vent would cause air to be vented from
the system resulting in a water-logged
expansion tank.
Circulator
The PRESTIGE Solo must be supplied with a
Central Heating (CH) circulator. The circulator
when wired directly to the PRESTIGE Solo
will allow for domestic hot water priority and
to provide circulation for the freeze protection
feature of the boiler control. See Graphs 2
through 5 on pages 72 & 73 for pressure drop
and minimum flow rate through the boiler.
Sizing Primary Piping
See Fig. 8 through 14, pages 20 - 24, 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.
Domestic Hot Water System Piping
See Fig. 8 , page 20 for recommended piping to
a DHW system. This recommended 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 con-
trol module, reference Section VIII - External
Wiring.
System Piping - Zone Circulators
Connect the PRESTIGE Solo to the system
piping as shown in Fig. 9 page 21 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 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.
NOTICE
CAUTION
17