Beretta 160/2,5 Manuel D'installation Et Utilisation page 26

ENGLISH
GE
17 INITIAL START UP
Checks and preparations for initial start-up
Fill the storage cylinder with (potable)
water.
Fill the solar collector circuit.
Make sure that the domestic cold water
inlet cock is open.
Make sure that the safety valves are
functioning.
Check the system for leaks.
Check the concentration of the anti-
freeze.
Uncover the solar collectors and clean
them if necessary.
Make sure that the system is securely
fi xed to the mounting frame.
Make sure that the roof does not leak.
Inspect the insulation.
18 MAINTENANCE
The solar water heating system must be serviced pe-
riodically by our Technical Assistance Service or by a
qualifi ed heating engineer.
9
The system should be serviced at least once a year,
ideally in the autumn.
9
Check the condition of the magnesium anode.
Visually inspect the collectors for
damage/dirt.
Visually inspect the storage cylinder.
Visually inspect the mounting frame and
roof anch or points.
Inspect the insulation.
Make sure that the roof does not leak.
Make sure that the safety valves are
functioning.
Check the system for leaks.
Check the concentration of the anti-
freeze.
Check the pH of the anti-freeze with
litmus paper.
Topping up or changing the heat transfer
liquid
Clean inside the storage cylinder (every 2
years or more frequently in hard water/
high temperature areas)
Checking the heat transfer liquid
− Use an instrument like a refractometer or den-
simeter to check the density of the anti-freeze. If
the value is below that necessary to protect the
system at the minimum temperature selected, re-
place the heat transfer liquid or add anti-freeze.
− Use litmus paper to check the pH (nominal val-
ue approx. 7.5). If the measured value is below 7,
change the heat transfer liquid.
Components of the solar storage tank (Fig. 51)
Topping up or changing the heat transfer liquid
For certain maintenance operations (such as replacing
pipes or unions or changing the heat transfer liquid) the
solar collector (primary) circuit may have to be drained.
Proceed as follows:
− remove the safety valve
− unscrew the cold water pipe of the solar circuit
from the cylinder and let the heat transfer fl uid
fl ow out.
− once the system has been emptied, proceed with
fi lling it by following the steps in the system fi ll-
ing section (15 Preparing for initial start up -
(Fig. 50)) and (16 FILLING THE SOLAR COLLECTOR
CIRCUIT)
For a simple top-up, proceed as follows:
remove the safety valve
1
2 top up the solar circuit with the heat transfer
liquid until it comes out.
3 follow steps 7 and 9 in the system fi lling section
(16 FILLING THE SOLAR COLLECTOR CIRCUIT).
9
Only use the products listed in our Catalogue to top
up the circuit.
9
In areas where there is a signifi cant risk of freez-
ing, take particular care over tightness testing and
fl ushing with water.
9
DO NOT drain the solar collector circuit under sunny
conditions or when the collectors are hot.
Cleaning inside the storage cylinder
Proceed as follows to clean inside the storage cylinder:
9
Disconnect the power supply
− Close the domestic cold water inlet cock.
− Drain the domestic water present in the boiler.
− Remove the fl ange.
− Check and clean the inside of the storage tank.
− Check the condition of the gasket. Replace if nec-
essary.
− Check the magnesium anode for wear and re-
place it if necessary.
− Check the condition of the electrical heater and
replace it if necessary
− On completion of cleaning, follow the above steps
in the reverse order to refi t all removed parts.
9
Screw the bolt out until the fl ange fi ts snugly against
the tank. Tighten the nuts to secure the fl ange (3),
proceeding diagonally around the fl ange to apply
pressure uniformly around the seal.
END USER INSTRUCTIONS
The solar natural system is a solar hot water heating
system that functions on the principle of natural circu-
lation. The heat transfer liquid therefore circulates by
normal convection.
The system comprises one or more solar collectors and a
jacket type storage cylinder, located above the collector/s.
The system does not require any pumps or adjustments.
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