VADA VFB-S35, Руководство по установке

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The pump may
be sucking air. Check that the level of liquid in the tank has not
dropped below the minimum priming level (8m).
There may be also be a leak in the suction pipe:
1. Close the isolating valve on the discharge
line side of the pressure controller
to see if the issue continues.
2. If it does, check the pressure control
for debris or suction pipe for leaks.
3. If it does continue, then check pressure
control and suction pipe for debris.
4. If found, repair or replace suction line.
The in-line strainer
on the suction line
may be blocked. If you do not regularly clean the filter, it
will clog up and cause the pump to fail.
1. Close the isolating valve on the suction line.
2. Remove/clean in-line strainer
or replace if necessary.
3. Once in-line strainer has been
cleaned, open isolating valve on
suction line and retry for pressure.
The mesh filter in the
digital water switching
unit may be blocked.
* Only applicable if
application is using
a digital water switch.
If a digital water switching unit is installed:
1. Switch off power to the unit.
2. Isolate the water lines and remove
the pump barrel union.
3. Inspect/clean/replace the
switching unit mesh filter.
The liquid column
may be above the
check valve on the
discharge line. The weight of water can force the check valve
on the discharge line to close. This prevents
air being expelled from casing and suction line,
affecting the pump’s self-priming performance.
Ensure water is completely drained
above the level of the check valve.
No water
supply at all. The rainwater tank
may be empty. 1. Check the tank level.
2. If empty/low, wait for the tank to refill.
There may be
blockage in the
pipework. 1. Close the isolating valves on the
suction and discharge lines.
2. If switching from tank and mains
water, close the isolating valve
on the mains line also.
3. Check pipework and devices for debris
4. If found, clean or replace pipework.
5. Open isolating valves again to check
and ensure flow rate is sufficient.
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SYMPTOM CAUSE SOLUTION