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9. Maintenance
9.1 General
For the achievement of a long unit life span,
regular maintenance is a must. Maintenance
works to be performed refer to unit assem-
blies that underlie either mechanical or elec-
trical wear and tear, or may be impeded by
residues in their proper functioning.
A steam humidifier's optimal performance
and the maintenance intervals required pri-
marily depend on the water quality encoun-
tered and the amount of steam produced. A
particular water quality may shorten or
lengthen maintenance intervals. The amount
of residues found in the steam cylinder
allows for a hint on future maintenance inter-
vals.
Another scenario influencing the unrestricted
unit availability is the main contactor lifetime
in terms of a maximum number of switch
cycles allowed, as indicated by its manufac-
turer. Unit control monitors the number of
switch cycles and produces a service mes-
sage when the max. number is reached.
9.1.1 Service messages
In case of a service message produced, the
HygroMatik logo in the main section of the
touch display (for explantion s. „FlexLine con-
trols“ manuals) is blanked. Instead, a frame is
shown with the service icon
in it and a
„Service message (xx)“ („xx“ indexes the
message code). When the message frame is
touched, the service message is displayed in
clear language.
The service messages are listed in detail in
the „FlexLine controls“ manuals. Following
hereafter, pls. find 2 service messages
denoted as examples:
•
„Steam_amount_counter“
is output
when the pre-set produced steam
amount is reached. Maintenance of the
device is necessary.
•
„Cycles_main_contactor x
“
is indicated
when the number of cycles pre-set for
main contactor „x“ (x = 1...5) is
reached. The main contactor should
then be replaced and the counter reset
(s. „Service“ submenu in the „FlexLine
controls“ manuals).
After a
„Steam_amount_counter“
message,
maintenance work mainly encompasses
checking and cleaning all of the unit parts
including the steam cylinder inside, and a unit
test run.
As part of the maintenance work, screw ter-
minals and plug connections must be
checked every time. If required, retightening
the teminal screws is a must as well as
ensuring tight fit of all of the plug connec-
tions.
Since steam and condensate hoses are sub-
ject to wear as well, hoses must also be
checked regularly for tightness, flexibility and
firm seating.
Seals are wear parts. As such, seal integrity
checks and replacement is also a part of the
regular maintenance work.
9.1.2 Service messages for preven-
tive maintenance
HygroMatik steam humidifiers continously
monitor the performance of the following
functional areas:
•
Blow-down operations
•
Cylinder filling
When reaching pre-set trigger levels, unit
control outputs preventive service messages
that relate to the corresponding functional
area.
The functional area addressed should then
be checked at short term and maintenanced,
if required (s. „FlexLine controls“ manuals,
„Service messages and warnings“ chapter“).
