25
Setting the control signal range (“SW2”)
Refer to comments in section “Signal connections”
Setting the maintenance interval time (“SW3”)
The maintenance interval is set with switch “SW3”. When the set time has expired,
a maintenance message indicates that the unit should be serviced.
The interval to be selected depends on the quality of the water and the type of unit.
It may have to be adapted to the actual circumstances during operation. The
following maintenance intervals can be selected:
Position
Water quality
Maintenance
Standard settings according to unit type Mk4 ST../Mk4 IT..
interval in hours
5-..
10-..
20-..
30-..
40-..
50-..
60-..
90-..
0
hard
(>540 ppm, >30 °dH, >54 °fH)
300
1
500
X
X
X
X
X
X
X
X
2
750
3
1000
4
medium
(200 ppm, 11 °dH, 20 °fH)
1500
5
2000
6
3000
7
4000
8
5000
9
soft
(<140 ppm, <8 °dH, <14 °fH)
6000
Note: The maintenance interval time refers to a steam output of 100 %. If less output
is required in operation, the maintenance interval is correspondingly increased.
Setting the flushing cycles (“SW4”)
The evaporation process increases the concentration of mineral salts in the steam
cylinder. Cyclic flushing followed by refilling of fresh water can keep the concen-
tration of mineral salts at a specific level.
The interval time to be selected depends on the quality of the water and the type
of unit. It may have to be adapted to the actual circumstances during operation.
The following maintenance intervals can be selected:
Position
Flushing interval
Unit type Defensor Mk4
“SW4”
at 100 % steam capacity
5-..
10-..
20-..
30-..
40-..
50-..
60-..
90-..
0
5 h
VE
VE
VE
VE
VE
VE
VE
VE
1
5 h
2
5 h
3
3 h
4
90 min.
5
40 min.
X
X
6
20 min.
X
X
7
10 min.
X
X
X
X
8
4 min.
9
2 min.
VE
=
fully demineralized water
X
=
standard setting
Содержание Mk4 IT 10 Series
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