Classeq Under Counter Range - User Manual
10
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.
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
Softener
Setting
Hardness
Water
Volume
(litres)
No. of
cycles
°dH
°e/°clark
°fh
ppm
h00
---- Water Softener deactivated --
--
---------
---------
h01
1
1.3
1.8
18
48.1
16
h02
2
2.5
3.6
36
45.7
15
h03
3
3.8
5.4
54
43.4
14
h04
4
5.0
7.2
71
41.2
14
h05
5
6.3
9.0
89
39.0
13
h06
6
7.5
10.7
107
36.9
12
h07
7
8.8
12.5
125
34.9
12
h08
8
10.0
14.3
143
32.9
11
h09
9
11.3
16.1
161
31.0
10
h10
10
12.5
17.9
179
29.2
10
h11
11
13.8
19.7
196
27.4
9
h12
12
15.0
21.5
214
25.7
9
h13
13
16.3
23.3
232
24.1
8
h14
14
17.5
25.1
250
22.5
7
h15
15
18.8
26.9
268
21.0
7
h16
16
20.0
28.6
286
19.5
7
h17
17
21.3
30.4
303
18.2
6
h18
18
22.5
32.2
321
16.9
6
h19
19
23.8
34.0
339
15.9
5
h20
20
25.0
35.8
357
14.4
5
h21
21
26.3
37.6
375
13.3
4
h22
22
27.5
39.4
393
12.3
4
h23
23
28.8
41.2
411
11.3
4
h24
24
30.0
43.0
428
10.4
3
h25
25
31.3
44.8
446
9.6
3
h26
26
32.5
46.5
464
8.8
3
h27
27
33.8
48.3
482
8.1
3
h28
28
35.0
50.1
500
7.4
2
h29
29
36.3
51.9
518
6.8
2
h30
30
37.5
53.7
536
6.3
2
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
Summary of Contents for D 400
Page 2: ......
