Water Connections - PENSOTTI PNCC-32N Instruction Manual

3.4 Water connections

In order to safeguard the heat exchanger and
circulation pump, especially in case of
appliance 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 when
the appliance 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 a pressure reducing valve and backflow preventer must be installed.

To facilitate the installation, the boiler is supplied with a 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.
LEGEND
HR HEATING RETURN
HEATING SUPPLY
HF
G GAS
HWO HOT WATER OUTLET
CWI COLD WATER INLET
INSTALLATION INSTRUCTIONS
3/4
Ø "
3/4
Ø "
Ø 1/2"
Ø 1/2"
Ø 1/2"
20