Velda Clear Control 25 Instrucciones De Uso página 10

unit. Always install the splashproof unit in the special compartment of the filter at the
place of the screw cap. Please be sure that it is out of the reach of children. Place the
ballast in an area protected against the sun and rain. Exclusively use grounded sockets
with closing cover. Prevent the plug and the receptacle form getting moist. Please
provide a good quality grounded connection to the electric mains and use an earth
leakage circuit breaker rated 30 mA. If the flow of the water stagnates, for example as a
result of blockage of a defective pump, the UV-C lamp should be switched off at once.
THE VALVE WITH SEVERAL FUNCTIONS
Attention: To avoid damage to the cover don't lift the filter by the handle when you are
moving it. To avoid leakage to the tap mechanism turn off the pump when changing
the position of the valve. When using the position valve, first push the handle down.
Subsequently it can be put in the right position. Position 2 will not be used for ponds.
The position valve (7) allows the following flow directions:
Position 1: back wash. This position is used to wash away the dirt at the bottom of
the filter. This can be necessary if coarse particles of dirt have accumulated under
the grate, as a result of which the capacity will be reduced (see dirt indicator). The
water is now flowing from top to bottom, which enables the dirt to be washed away.
If you want to achieve this, you have to remove the screw cap (1) and a hose should
be connected to the waste outflow (C). The filter materials can not be cleaned in this
way. They will have to be rinsed and cleaned by hand.
Position 2: do not use for ponds.
Position 3: pond drain. This position is used to empty the pond, should the need
arise, and to wash away the dirt in the valve. To this end you should connect a hose
to the waste outflow (C).
Position 4: filtration. The water flows through the preliminary compartment to the
bottom grate and through the filter materials to the outflow (B).
Position 5: stop. The filter does not allow water to pass through (first switch off the
pump). This position is used when cleaning the pond pump, the while the filter
continues to be full of water. After cleaning the pump, the valve is put in the filtration
position again.
Position 6: bypass. This is the medication position. In this case, the water is not
flowing through the filter material, thus the medicine stays in the water. However,
after the medicine period the filter material has to be rinsed.
Position 7: winter. In this position the valve mechanism will be released from
pressure when the filter is not in use. This position is used by secure storage of the
filter, for example in winter.
MAINTENANCE
Unplug the UV-C Unit from the mains during maintenance work.
The maintenance of the filter is quite simple. Use the back wash function to flush
away the dirt on the bottom of the filter. To this end, you should connect a fitting
hose to the exhaust (C), the end being kept outside the pond.
In general it will be enough if the filter material will be rinsed a number of times
during the season. This has to be done by hand, because the filter material will not
be cleaned in the back wash position. You are advised to renew the active carbon
once or twice a year. You should do this at any rate at the beginning of the new pond
season. If, due to certain circumstances, the water supply to the filter has not taken
place during 4 hours or more, the filter material should be rinsed first, before filtration
will be resumed. This is to prevent that, owing to lack of oxygen, killed micro-
organisms will be rinsed into the pond. If the filter is completely clogged, loosen
the screw cap (1) under the filter, then the mud will pour out. In order to maintain
optimum action of the UV-C Unit, the quartz glass should be cleaned at least three
times a year. To achieve this, you should proceed as follows: switch off the power
supply of the UV-C and the pump installation. Now carefully remove the quartz tube
and clean it, using lukewarm suds. Any lime deposit should be removed with the help
of vinegar. The effective lifetime of the PL UV-C lamp is about 7,500 burning hours.
If used continuously, the UV-C lamp will consequently last for one pond season. It is
recommendable to install a new UV-C lamp each year in spring. For your safety, the
lamp switches off automatically when you loosen the screw cap (if the plug is still in
the socket). You should then unplug the unit. You can switch the UV-C lamp back
on after 3 minutes by plugging it in again. Place the spacer round the lamp for more
stability (18, 36 and 55 Watt). Only after a week or two, the output of the PL UV-C lamp
will be optimum. This is a normal process for this type of lamp.
DIRT INDICATOR
The dirt indicator (6) on top of the cover indicates the extent of contamination in the
filter materials and thus the flow rate of the filter. By increasing pollution in the filter
the indicator will move from green through orange to red.
Green: no pollution, optimum flow rate
Orange: increasing pollution, limited flow rate
Red: heavy pollution, impeded flow rate
GUARANTEE
Except for the UV-C lamp, quartz glass, rubber rings, fastening clamp, hose swivels
and filter materials, Velda guarantees the correct functioning of this apparatus for