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9.2 Maintenance frame work
when unit is operated with
fully demineralised water and
condensate
Instructions on maintenance and cleaning
intervals are entirely based on empirical data.
9.3 Maintenance when unit is
operated with tap water or
partially softened water
No precise maintenance intervals can be
specified because these always depend on
water quality and the amount of steam gener-
ated. It is advisable to adjust the frequency of
maintenance to the specific operational experi-
ence. HygroMatik recommends to check the
opened steam cylinder 1 or 2 weeks after ini-
tial commissioning in order to quantify the
amount of residue produced so far, allowing
for determining future maintenance intervals
and/or the adjustment of blow-down cycles
possibly required.
Blow-down cycles
The vaporisation process causes hardness
builders (calcium) in form of solids of various
compositions to fall out within the steam cylin-
der. Cyclic blow-down by means of a powerful
blow-down pump followed by fresh water refills
remove parts of this solid built-up.
Water quality
When tap water is used, it must be taken into
account that cleaning intervals shorten as the
carbonate hardness level increases. As a gen-
eral rule, it is preferable to operate the unit
with fully demineralized water since ope-ration
will not be affected by mineral deposits and
flushing loss will be minimized.
Possibly, maintenance intervals may be
extended by moderately increasing the blow-
down cycle rate. Please consult your expert
dealer.
Cycle time
Maintenance work
4 weeks after
initial commis-
sioning
Visual inspection of electri-
cal and mechanical connec-
tions.
Visual inspection of level
control.
Visual inspection of the
steam cylinder interior.
anually
Visual inspection of electri-
cal and mechanical connec-
tions.
Visual inspection of level
control.
Visual inspection of heater
element and thermo switch
Visual inspection of steam
cylinder interior.
If required, cleaning of
steam cylinder, heater ele-
ment, thermo switch and
level control followed by the
replacement of all sealing.
3OHDVHQRWH
