Fig. 8 - EXALT Solo Near Boiler Piping - Hydraulic Separator
17
CHAPTER 4
CHAPTER 4 - BOILER PIPING
4.5. Additional Limit Control
If a separate Low Water Cut O (LWCO) is required by
the local jurisdiction or when the boiler is installed
above the system piping, the following guidelines must
be followed:
• The LWCO must be designed for water installations,
electrode probe-type is recommended.
• The LWCO must be installed in a tee connection on
the boiler supply piping above the boiler.
• Wiring of the LWCO to the EXALT is done directly
onto the low voltage terminal strip. Reference
Fig. 30 on page 46 for available external limit
(manual or auto reset) terminals.
If the installation is to comply with ASME or Canadian
requirements, an additional high temperature limit may
be required. Consult local code requirements to determine
compliance. The limit should be installed as follows:
• Install the limit in the boiler supply piping between
the boiler and any isolation valve.
• Consult heat exchanger for maximum temperature
set point.
• For wiring of the limit, reference Fig. 30 on page 46.
Wire the limit to the manual reset terminals on the
low voltage terminal strip. An open manual reset
limit will require a manual reset of the control.
4.6. Backflow Preventer
• Use a backow preventer valve in the make-up
water supply to the unit as required by local codes.
4.7. EXALT Solo Boiler System Piping
• It is recommended on all piping app-
lications to utilize a primary/secondary
piping arrangement as a means to provide
freeze protection of the boiler, which is
an integral function of the boiler control.
Maintain at least the minimum boiler flow
rate shown in the Graphs of Chapter 19
on page 101. For other piping
arrangements, contact Ideal Technical
Support or consult other approved/
recognized design arrangements.
• On piping applications utilizing a single
zone or other recognized piping design
arrangements, it is recommended that
the installer uses flow/check valves with
weighted seats at or near the EXALT Solo to
prevent gravity circulation.
BEST PRACTICEBEST PRACTICE
Cold
Water
Fill
T P
T P
System
Supply
System
Return
Cold
Water
Fill
System
Return
System
Supply
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