Beretta 160/2,5 Manuel D'installation Et Utilisation page 25

14 ELECTRIC CONNECTIONS - (FIG. 49)
The electrical connections must comply with the regu-
lations in force in the country of installation and must
always be made by qualifi ed personnel.
Below is a diagram of how the power supply is con-
nected to the heating element via the thermostat.
NOTE: all storage tanks are supplied with a thermostat
pre set at 80 ° C. Before starting, set the thermostat to
the desired temperature.
9
IMPORTANT: The plastic cover of the electrical con-
nections on the side of the water tank must be in-
stalled as shown in the drawing above. The smaller
hole is for the overfl ow of the water that comes out
of the electrical cavity and must be positioned at
the lowest point of the lid. The hole of the electric
cable is bigger to fi t the diameter of the cable and
the protective jacket.
9
To make the electrical resistance safe, it is recom-
mended to provide the earth connection as shown
in the (Fig. 49)
9
All shut-off cocks and drain cocks must be easily
accessible. Make sure that the end user fully under-
stands how they function.
15 P REPARING FOR INITIAL START UP - (FIG. 50)
STEP 1
Connect the cold-water supply tube on the safety and
non-return valve onto the tank. To save time you may start
fi lling the tank at this point. When water starts overfl owing
from the hot water open circuit outlet close the water supply.
STEP 2
Connect the hot water closed circuit tube between the col-
lector and the tank. Ensure that the tube follows an upwards
route towards the tank. When tightening the fi ttings on the
collector exit make sure you use 2 spanners, 1 for tightening
and 1 against to avoid damaging the absorber.
STEP 3
Connect the cold-water closed-circuit tube between the col-
lector and the tank. Ensure that the tube follows an upwards
route towards the tank. When tightening the fi ttings on the
collector inlet make sure you use 2 spanners, 1 for tightening
and 1 against to avoid damaging the absorber. Make sure the
length and shape of the tube is appropriate. Do not tighten
the tube on the tank side.
STEP 4
Mix water and NOX fl uid in a bucket according to the the ta-
ble that you can fi nd in the paragraph (16 FILLING THE SOLAR
COLLECTOR CIRCUIT).
STEP 5
Detach the cold-water closed-circuit tube from the tank.
Pour the solution slowly into the tube in order to fi ll the col-
lector. Let the liquid overfl ow through the outlet of the tank
until no air bubbles come out and then attach and tighten
the cold fl uid union to the tank. You may need to attach an
auxiliary tube to the cold-water closed-circuit tube so as to
pour the solution from a point higher than the closed-circuit
hot water inlet of the tank.
STEP 6
Complete fi lling the closed circuit with the solution from the
safety valve outlet at the top of the tank.
STEP 7
Assuming the tank is fi lled with water and the closed circuit
is fi lled with solution you may remove the cover sheet from
the collector at this point. If it is a sunny day the solution
will start overfl owing from the safety valve outlet at the top
of the tank as it heats up. If there is no overfl ow check that:
• The closed circuit is fi lled.
• There is no air in the closed circuit.
• There are no leaks in the closed-circuit connections.
Take the appropriate action until there is overfl ow.
STEP 8
Connect the domestic hot water tube. Turn on the do-
mestic cold-water supply and check for leaks.
STEP 9
After approximately 20 minutes you may install the
closed circuit safety valve at the top of the tank.
16 FILLING THE SOLAR COLLECTOR CIRCUIT
H eat transfer fl uid
The antifreeze provided contains non-toxic, biodegrad-
able and ecological propylene glycol. Mix propylene
glycol with water (preferably de-mineralized).
Determine the required concentration of propylene gly-
col using the table opposite based on the temperatures
for which frost protection is required.
9
To top up the circuit, use only the products listed in
our catalogue.
Antifreeze
Temperature
liquid
55%
50%
45%
40%
35%
30%
25%
25
ENGLISH
Density (20 ° C)
-40 °C 1.048 kg/dm
-32 °C 1.045 kg/dm
-26 °C 1.042 kg/dm
-21 °C 1.037 kg/dm
-17 °C 1.033 kg/dm
-14 °C 1.029 kg/dm
-10 °C 1.023 kg/dm
3
3
3
3
3
3
3