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9.2 Maintenance when unit is
operated with fully deminera-
lised 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 expe-
rience. 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.
SuperFlush
Blow-down efficiency may be increased by
use of the SuperFlush retrofit kit that boosts
the blow-down effect in that it creates a vortex
flow in the strainer basket.
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
general 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 electrical and mechanical connections.
Visual inspection of level control.
Visual inspection of the steam cylinder interior.
anually
Visual inspection of electrical and mechanical connections.
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 element, thermo switch and
level control followed by the replacement of all sealing.
Please note