Water Connections - PENSOTTI PCI 34 Instruction Manual

3.4 Water connections

In order to safeguard the heat exchanger and circulation pump, especially in case of boiler replacement, it
is recommended that the system is hot-flushed to remove any impurities (especially oil and grease) from
the pipes and radiators.
In order to safeguard all waterside components the supplied Fernox Commissioning Kit Must be used in
its entirety.
Make sure that the domestic water and central heating pipes are not used to earth the electrical system.
The pipes are totally unsuitable for this purpose.
Isolation Valves must be installed on the heating and D.H.W circuits. This will facilitate all maintenance
and service operations where the boiler needs to be drained.

To prevent vibration and noise coming from the system, do not use pipes of reduced diameter, short radius elbows
or severe reductions in the cross sections of the water passages.

In order to guarantee the reliability of the boiler and prevent permanent damage in areas with high water inlet
pressure too, a 36.3 psi (2.5 bar) pressure reducing valve should be fitted.

To facilitate the installation, the boiler is supplied with an hydraulic connection kit (see fig.2).
A pressure relief valve is installed in this dual purpose boiler that is rated in accordance with and complying with either
The Standard for relief Valves and Automatic Shutoff Devices for Hot Water Supply Systems, AINSI Z21.22 or The
ANSI/ASME Boiler and Pressure Vessel Code, Section IV (Heating Boilers).
The relief valve must be installed such that the discharge will be conducted to a suitable place for disposal when relief
occurs. The discharge line must be installed to allow complete drainage of both the valve and the line. If this unit is
installed with a separate storage vessel, the separate vessel must have its own temperature and pressure relief valve.
This valve must also comply with The Standard for Relief Valves and Automatic Shutoff Devices for Hot Water Supply
Systems. AINSI Z21.22 (in the U.S. only). A temperature relief valve is not required but if one is used, do not install the
valve with the probe directly in the flow of water. This may cause unwarranted discharge of the valve.
INSTALLATION INSTRUCTIONS
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