Water Connections - PENSOTTI Solenne PCH50B-H Instruction Manual

3.5 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 where 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 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
HF HEATING SUPPLY
RCR D.H.W. INDIRECT RETURN
RCF D.H.W. INDIRECT FLOW
CWI COLD WATER INLET
INSTALLATION INSTRUCTION
Ø 3/4"
Ø 3/4"
Ø 3/4"
Ø 3/4"
Ø 1/2"
21