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Ver 1_ES_EN_12-21_(23-12-2021)_lt
in the bottom pipe
In every case the distance between water heater maintenance cover and the closer wall must be minimum 60
cm.
It has to be fitted to the wall using appropriate rag bolts with minimum diameter of 8 mm. The wall with feeble
charging ability must be on the spot where the water heater shall be hanged suitably reinforced.
3.- CONNECTION TO THE WATER SUPPLY.
The water heater may be connected to a closed-circuit pressure system which enables several points of
use. For safety reasons the supply pipe must be fitted with a return safety valve or alternatively, a valve of the safety
class that prevents the pressure in the tank from exceeding the nominal pressure by more than 0.1 MPa. The
heating of water in the heater causes the pressure in the tank to increase to the level set by the safety valve. As
the water cannot return to the water supply system, this can result in the dripping from the outlet of the safety valve.
The drip can be piped to the drain by installing a catching unit just below the safety valve. The drain installed below
the safety valve outlet must be piped down vertically and located in the environment that is free from the onset of
freezing conditions. In case the existing plumbing does not enable you to pipe the dripping water from the return
safety valve into the drain, you can avoid the dripping by installing a 3-litre expansion tank on the inlet water pipe
of the boiler. You should ensure that the return safety valve is functioning properly by checking it on a regular basis
i.e. every 14 days. To check the valve, you should open the outlet of the return safety valve by turning the. The
valve is operating properly if the water comes out of the nozzle when the outlet is open.
Legend:
1- Return safety valve
2- Checking valve connection
3- Non-return valve
4- Pressure reduction valve
5- Closing valve
Putting into service:
Before connect hydraulically the water heater to water network lets the water flow some to time to remove
all dirty which could damage the safety valve and block the diffuser.
To fill the water heater properly leave a hot water tap open to drain the water heater tank and only close it
when water comes out fluently. When water become hot after the necessary time tight again all connections to
assure a correct water sealing.
If the water network pressure is higher than the nominal pressure of the water heater, it is compulsory to
install special valve to reduce the water inlet pressure between 2 and 3 bar.
4.- CONNECTION OF THE WATER HEATER TO THE PHOTOVOLTAIC PANELS.
The connection of water heater to the photovoltaic panels must be performed according to standards for
electric installation by authorized installers.
Fig. 2.2
Fig-3 Hydraulic installation
13
6- Checking fitting
7- Funnel with outlet connection
F - Cold water
C - Hot water
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