Water Filter Maintenance - Astoria 1GR Use And Maintenance Manual

7.3.6 NON-RETURN DRAIN VALVE check
The non-return drain valve is an important component for
the correct operation of the machine. Perform the check as
follows:
• Activate the dispensing groups for about 30 seconds.
• Attach a filter holder (7) with a pressure gauge (available
on request) to the dispensing group.
• Activate the dispensing group, and use the
pressure gauge (8) to monitor the pressure
as it increases up to 0.8-0.9 MPa (8-9 bar).
• Check that the pressure is increasing due to
the heated water expanding until it reaches
approximately 1.2 MPa (12 bar): when
this value is reached, it confirms that
the valve is working correctly and the
seals and solenoid valves are tight.
• Stop dispensing.
• Repeat the check on the other dispens-
ing groups.
If any malfunctions are de-
tected, the valve must be re-
placed.
7.4 Water filter maintenance
7.4.1 Determining the water hardness
As part of the filter maintenance, it is advisable to test the
water beforehand.
To identify the carbonate hardness of the water use the spe-
cial kit as follows:
• Put 10 ml of water to be tested (1) in the test tube.
• Add a drop of reagent (2) and mix.
• Proceed in the same way by counting the number of drops
until the solution (3) turns from blue to red.
1 DROP = 1°dKH
Example: 9 Drops ----> 9°dKH carbonate hardness
3
TECHNICIANS' manual
Depending on the hardness of the water, adjust the bypass of
the water filter as shown in the table below. Example:
7
8
To adjust the bypass, push the (4) button and turn.
2
1
7.4.2 Bypass configuration
9°dKH water hardness
Bypass adjustment 2
Water
Bypass
hardness
Adjust.
(°dKH)
4 3 6.250
5 3 5.000
6 3 4.165
7 3 3.570
8 2 3.125
9 2 2.775
10 2 2.500
12 1 1.865
14 1 1.600
16 0 1.185
20 0
24 0
≥ 25 0 ≤ 755
The values indicated in the table may vary, de-
pending on the type of filter cartridge used.
Filter capacity (litres)
V M L
9.500 13.000 17.000
7.600 10.400 13.600
6.330 8.665 11.330
5.425 7.425 9.710
4.750 6.500 8.500
4.220 5.775 7.555
3.800 5.200 6.800
2.835 3.885 5.080
2.430 3.330 4.355
1.800 2.465 3.220
945 1.440 1.970 2.575
790 1.200 1.640 2.145
≤ 1,150 ≤ 1,575 ≤ 2.060
4
49
XL
108
of