Classeq D400 Manual De Usuario página 16

 Your water supply to the warewasher is from a suitable
external water softener unit.
4.5.2 Water hardness explained
Water hardness occurs because certain chemicals in the rocks
through which the water passes on its way to the consumer
slowly leach out into the water.
The problem shows itself in two forms:
1. When hard water is heated the chemicals come out of the
solution and appear as solid particles (limescale) that are
carried round the warewasher. These particles are formed
most quickly at the hottest part of the warewasher –
typically, the rinse element and the Rinse Tank. This is why
the Rinse Tank is the best place to look to judge if limescale
is being formed in a warewasher.
2. Most commercial washing chemicals operate much less
efficiently in hard water, and this will often show as poor
results, failure to remove tannin stains or condensation on
glasses. Tannin stains appear to cling to the hard water film
in the drink, which then clings to the surface of the cup or
saucer. With soft water this is not the case.
Some types of hard water do not produce limescale when
heated, but still reduce the performance of washing chemicals, as
mentioned above. This is known as permanent hardness.
Temporary hardness is when the hardness can be largely
removed by conversion into
limescale by boiling.
If limescale is produced
inside a warewasher it will
cause a number of
maintenance problems, for
example:
Coating of heating

elements leading to
slow heating and
eventually, element
failure.
Blockage of rinse jets,

showing as poor results.
 Wear of bushes in the centre boss, showing as poor results
and possibly wash water passing backwards into the rinse
system.
Blockage of the rinse aid injection point in the boiler.

 White marks appearing on glasses, dishes and cutlery.
Dishes or cups may appear dirty even after a wash.

Especially coffee or tea cups.
Discolouration of the inside of the warewasher, making

cleaning difficult.
Blockage of hoses due to limescale deposits "furring up" the

inside of the hoses.
When limescale is found, it must be removed with commercial
de-scaling chemicals, used with care in accordance with the
instructions on the product.
The descaling instructions in this manual should always be
followed.
The Rinse Tank is difficult to de-scale and a service engineer may
be required to carry this out.
10
Classeq Under Counter Range - User Manual
Your local water board / water supply company should be able to
tell you if the water in your area is hard or soft.
Alternatively you can establish the hardness of your water supply
yourself using a simple water hardness testing kit.
Water Softener settings:
Your Water Softener needs to be set up to soften the water
supply depending on the water hardness, according to the
following table:
Water Hardness
Softener
°dH °e/°clark
Setting
---- Water Softener deactivated --
h00
--
h01 1 1.3
h02 2 2.5
h03 3 3.8
h04 4 5.0
h05 5 6.3
h06 6 7.5
h07 7 8.8
h08 8 10.0
h09 9 11.3
h10 10 12.5
h11 11 13.8
h12 12 15.0
h13 13 16.3
h14 14 17.5
h15 15 18.8
h16 16 20.0
h17 17 21.3
h18 18 22.5
h19 19 23.8
h20 20 25.0
h21 21 26.3
h22 22 27.5
h23 23 28.8
h24 24 30.0
h25 25 31.3
h26 26 32.5
h27 27 33.8
h28 28 35.0
h29 29 36.3
h30 30 37.5
4.5.3 Water supply hose connection
Classeq recommend installing a shut off valve in the mains water
supply line near the warewasher such that it is easily accessible.
Your warewasher is supplied with a new UK Water Regulations
Advisory Scheme (WRAS) approved water inlet hose, requiring a
Water No. of
Volume cycles
°fh ppm
(litres)
--------- ---------
1.8 18 48.1
3.6 36 45.7
5.4 54 43.4
7.2 71 41.2
9.0 89 39.0
10.7 107 36.9
12.5 125 34.9
14.3 143 32.9
16.1 161 31.0
17.9 179 29.2
19.7 196 27.4
21.5 214 25.7
23.3 232 24.1
25.1 250 22.5
26.9 268 21.0
28.6 286 19.5
30.4 303 18.2
32.2 321 16.9
34.0 339 15.9
35.8 357 14.4
37.6 375 13.3
39.4 393 12.3
41.2 411 11.3
43.0 428 10.4
44.8 446 9.6
46.5 464 8.8
48.3 482 8.1
50.1 500 7.4
51.9 518 6.8
53.7 536 6.3
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