Application In The Ex - Endangered Areas - Homa HSK15 Operating Manual

In such case that not all of the information and instructions are found in this operating manual, please
ask the manufacturer, HOMA-Pumpenfabrik GmbH (address see page 2).
The manufacturer of this device takes no responsibility in case the operating manual is disregarded.
This operating manual contains fundamental references which must be strictly observed during
installation, operation and maintenance. Therefore, it is absolutely necessary that this operating
manual be read before mounting and operation by the installer as well as by the appropriate qualified
personnel / user and it has to be available at all times.
Not only the general safety guidelines mentioned in this main point "Safety Guidelines" section be
observed, but also special safety references referred to in other sections of the manual.
Before operating make sure that:
•
the applied measuring method has been correctly selected in the control,
•
the level sensor / float switch to be used are correctly connected,
•
the thermo contacts of the pump are appropriately connected and not reversed,
•
the current ranges and settings of the motor starter match the rated currents of the pumps,
•
the connections have been executed properly and correctly,
•
the control is correctly backed up.
Currently valid standards (EN, VDE, ...) as well as those of the local electrical board are to be
observed. The OFF position of the internal switches is not be used in order to carry out maintenance
of the pump(s). For this purpose, the main switch shall be used. The integrated manual motor starter
can also be used (switch to 0-position and secure properly against renewed switching – for example
by means of a padlock).
If the fuse of the control
Si 3,15 AT (slow-blow 3,15A; 5 x 20 mm according to EN 60127-2/III)
2.3 Application in the Ex – endangered areas
In some cases, parts of the control device may be exposed to explosion endangered areas ( as a rule
zone 1 according to the EU –Directive 94/9/EG, ATEX 100a).
If the control device is operated on such a shaft, well etc., then the electrical circuits for the sensors
(level sensor, float switches) must be intrinsically safe (e.g. by using an appropriate electrical (Zener)
barrier). Only controls with appropriate ignition protection characteristics should be connected. The
currently applicable standards concerning operating devices in explosion endangered areas shall be
observed at all times.
The use of an open measuring system according to the impact pressure method in explosion
endangered installations is permitted only with monitored aeration (bubbler system).
1
The fuse of the control is located in the fuse holder on the lower left , next to clamps.
Connecting and maintenance of the control may
be carried out by qualified personnel only.
Before opening the cover, make sure that the
voltage is completely removed.
1
is faulty, it should only be replaced by a fine fuse of the following types:
HOMA Pump Technology
HSK_operating_manual_English_Ver3.doc
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