Circulator; Sizing Primary Piping; Domestic Hot Water System Piping; System Piping - Zone Circulators - IDEAL EXALT Solo 110 Installation & Maintenance Manual

CHAPTER 4 - BOILER PIPING

4.7.4 Circulator

A circulator with flow check must be utilized with the EXALT
Solo. The circulator, when wired directly to the EXALT, will
allow for domestic hot water priority and provide circulation
for the freeze protection feature of the boiler control. See
the Graphs in Chapter 19 on page 101 for pressure drop and
minimum flow rate through the boiler.

4.7.5 Sizing Primary Piping

See Fig. 8 on page 17 through Fig. 9 on page 18 and
Fig. 21 on page 33 through Fig. 22 on page 34, for
recommended piping arrangements based on various
applications. Size the piping and system components
required in the space heating system using recognized
design methods.

4.7.6 Domestic Hot Water System Piping

See Fig. 21 on page 33 through Fig. 22 on page 34
for recommended piping to a DHW system. This
recommended piping configuration ensures priority is
given to the production and recovery of DHW.
The piping for DHW is separate from the boiler system
piping and does not require a primary / secondary
piping configuration.
To wire the DHW circulator to the boiler control module,
reference Chapter 8 on page 45.
4.7.7 System Piping – Zone Circulators
Connect the EXALT Solo to the system piping as shown
in Fig. 21 on page 33 when zoning with zone circulators.
The installer must provide a separate circulator for each
zone of space heating.
NOTICE
To ensure an adequate flow rate through the EXALT
Solo, the boiler supply and return piping size must
be a minimum of 1 inch for the EXALT Solo 110, 1-1/4
inch for the EXALT Solo 155/199.
4.7.8 System Piping – Zone Valves
Connect the EXALT Solo to the system piping as shown
in Fig. 21 on page 33 when zoning with zone valves.
NOTICE
To ensure an adequate flow rate through the EXALT
Solo, the boiler supply and return piping size must
be a minimum of 1 inch for the EXALT Solo 110, 1-1/4
inch for the EXALT Solo 155/199.
4.7.9 System Piping – Through Boiler
Primary / secondary piping is preferred, but is not required
for smaller systems (1 to 3 zones) provided that at least
the minimum flow rate through the boiler is maintained
at all times. The circulator must be sized to overcome
the pressure drop through the system as well as the
EXALT Solo. See the Graphs in Chapter 19 on page 101 for
pressure drop and minimum flow rate through the boiler.
Fig. 21 on page 33 illustrates a multiple zone valve
system with a single system/boiler circulator. A by-pass
loop with a pressure differential valve must be installed
on the system piping.
Fig. 22 on page 34 illustrates a single zone system
utilizing the boiler circulator as the system circulator.
4.7.10 System Piping – Radiant Heating
The heat exchanger design of the EXALT 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 design and
construction of the EXALT Solo heat exchanger allows the
installation of the boiler on systems with non - oxygen
barrier tubing.
NOTICE
The boiler water supply temperature can be maintained
by the EXALT Solo, potentially eliminating the need for
a mixing system to achieve the desired temperature if
all zones of heat require the same temperature setpoint.
It is recommended to install a high temperature limit to
ensure that the primary supply temperature does not
exceed the maximum allowable temperature for the radiant
tubing.
NOTICE
The addition of a high temperature limit is important
if the EXALT Solo is connected to a domestic hot
water system, which requires a high primary supply
water temperature.
Size the system piping and circulator to provide the
flow needed for the radiant system.
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