IV 1.7. I M P O R T A N T N O T E S
If the first pre-treatment tank is pumped-off, one has to change-over to the second
one in time. This is carried out by opening the ball valve at the raw water collector of
tank 2 and only after that the ball valve of tank 1 is closed. The plant can be
operated continuously.
It is not allowed to interrupt the started filtration, as the filter layer would fall from the
filter cartridges if the water flow is interrupted. If, however, during or shortly after the
commissioning the water flow is interrupted due to any reason, the unit can be
started again (circuit approx. 5 - 7 min.)
The filter material fallen from the cartridges embedds by new start. If the plant had
already been switched to filtration, one has to operate again in circuit during restart.
But if the plant had been in operation for more than 1 hour, backwashing of the filter
material has to be carried out as well as new precoating.
The operation time of the plant strongly depends on the quality of the raw water in
the pretreatment tanks. In case of poor waters or at a very bad flocculation, the plant
can show already after 1 hour a differential pressure of 3 bar and has to be
backwashed. If the pretreatment is very good, running times of 5 - 7 hours and more
can be reached at full capacity.
Operation interruptions:
If no pure water discharge is required for a short period, i.e. for 30 min., the plant
capacity can be lowered by throttling the motor pump to approx. 1 m³/h. Then one
switches to circuit, by which a water loss is avoided and the filter is not polluted. If
water shall be given again, one only has to switch the 3-way valve from „circuit“ to
„filtration“.
The filter material Berkesil KE has to be prepared already during operation for the next
precoating. The precoating material only has to be stirred then and can immediately be
used for further precoating after backwashing of the precoat filter.
Take care that during operation of motor pumps, the fuel
tanks are refilled in time.
Careful
refilling of the motor
pumps with fuel is absolutely required. The same applies for
operation with electric pumps for the current generators.
Important
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