Pleion EGO Smart.Solar.Box 110 Mode D'emploi page 23

Examples of system layouts
The solar collector collectors with integrated storage can be
connected in different ways.
Some examples, which are not exhaustive, follow.
Below are some illustrative, non-exhaustive and purely
indicative schemes. It will be the responsibility of the
technician to evaluate the solution to be activated.
Layout 1: hydraulic connection to a traditional boiler
5-way thermostatic , mixer
and diverter valve
max 3BAR
Layout 2: hydraulic connection to a boiler prepared for
operation with a solar power system
max 3BAR
Rev. 4.0 del 16|03|2022
Indications on gaskets and connections
The external components of the solar collector with
integrated storage are all made of plastic, to reduce thermal
dispersion.
The connections were created for the use of gaskets with
flat seal.
Only use the flat washers supplied with the
collector and the valves to seal the connections.
Do not use other types of seal or additional
seals, such as hemp, Teflon, sealing paste or
similar. No guarantee rights will be recognised
if seals or additions other than those supplied
are used.
When tightening the connections:
• make sure the gaskets are positioned correctly;
• use a spanner and a torque wrench;
• use the spanner to keep one of the two connections steady, so
that it does not move from its seat, and to prevent damaging the
connection;
• tighten the other connection using the torque wrench, without
exceeding a tightening torque of 20 Nm.
• Using flexible hoses
Using flexible hoses
Only removable connections (e.g. stainless steel bellows
and flexible pipes) must be used to connect the water lines
to the valves on the solar collector connections.
This compensates the thermal expansion of the lines caused
by temperature oscillations and makes disconnecting
and repositioning the solar collector easier if it has to be
removed.
Make sure the connecting pipes, once installed,
can move in order to guarantee suitable thermal
expansion. It is advisable to use a connecting
system that is not fixed (e.g. staples).
Other indications
Only use water supply pipes that are suitable for the
domestic sector and that can resist a temperature of at
least 120 °C.
In order to reduce thermal dispersion and prevent the
risk of freezing, it is advisable to insulate the pipes that
supply the collector with water and towards the user with
insulation material of suitable thickness; for outdoor pipes
use material that is UV-resistant.
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Assembling the safety and one-way
valve
In order to limit the overpressure of the EGO or EGO
PRIME system, it is compulsory to install the safety and
non-return valves supplied as standard components
upstream from the collector. This solution also prevents
the system from emptying in the case of a water shortage
from the mains. For the coupling, use the flat ¾'' gaskets
supplied. For ensuring correct operation of the valve,
as well the validity of the warranty of the collector, the
aforementioned safety or non-return valves must never be
isolated, obstructed or covered. For the correct positioning
please refer to the installation diagram in the "HYDRAULIC
CONNECTION" section.
The VALVE is supplied as a standard component with
the collector. If it has been misplaced or lost contact the
supplier and only ever use original valves.
This component acts as:
- a SAFETY VALVE, with opening set at5,0 ± 0,3 bar;
- a ONE-WAY VALVE, to stop the water from returning
to the water system.
If you want to install a discharge valve at inflow
(recommended), it should be positioned between the safety
valve and the inflow connection.
The safety valve must be installed correctly; if
it is not, leaks can occur. No guarantee rights
will be recognised if not installed or if installed
correctly.
Assembling the safety unit (an
alternative to the safety valve)
For installations in Italy and in countries where a regulation
similar to the one established by Ministerial Circular no. 829571
of 26 March 2003 regarding accumulation water heaters:
"...these devices must be connected to the domestic water system
using a hydraulic safety unit. This unit must include at least one
interception tap, a one-way valve, a control device for the one-
way valve, a safety valve, a hydraulic charge interrupting device,
all accessories necessary for using the water heaters safely. The
design, production and operation criteria of the hydraulic safety
units are those defined by the European Commission Regulation
EN 1487:2002...", the supplied safety and one-way valve is not
suitable and must be replaced with a safety unit that complies
with the above standard.
The supplied valve only answers the EN 1717 regulation defined
in section 5.4 of the EN 12976-2 regulation.
To comply with the indications above, the installer can choose
whether to assemble the individual devices listed above, or install
the SAFETY AND ONE-WAY VALVE, available as an optional
accessory on request (code 4400223301).
It includes a valve body, with MF ¾'' connections, that contains
several elements:
• the safety and outflow valve, set at 4.5 ± 0.5 bar;
• the one-way valve, with control device (can be inspected,
self-cleaning);
• the device for interrupting the hydraulic load;
• the stopcock;
• an adjustable outflow trap.
DANGER! Do not assemble the safety system
together with the safety and one-way valve.
Installing the safety system is an alternative to
using the safety and one-way valve (standard
supplied).
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