VADA VFB-HM80, Installation Manual

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The in-line strainer
on the suction line
may be blocked. Check for blockages in the in-line strainer:
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.
There may be
presence of leaks
which are higher
than the minimum
flow of 0.6 l/min. If the pump is turning on, then off in short
durations there may be a leak in the pipework.
1. Close the isolating valve on the
discharge line of the pressure controller
to see if the issue continues.
2. If it does not, check all taps, pipes, irrigation
solenoid valves & toilet cisterns for leaks.
3. If it does continue, then check pressure
control and suction pipe for debris.
4. If found, repair or replace pipework.
The pump may have
been incorrectly sized
for the application. Contact the Reece store where the
product was purchased from.
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.
Pump performance
is unstable (e.g.
there is a change or
reduction of pressure
or flow output). There may be
cavitation in the pump
(demand for water
is higher than it
can pump).
* Cavitation can be
identified by the noise
of the pump. You
will hear a bubbling,
crackling sounds like
marbles rattling inside
the pump casing.
The length of the suction pipe may be too long,
or the internal diameter may be too small:
1. Reduce either the suction
height or distance.
2. Increase the suction pipe internal diameter
to same size as the pump inlet or larger.
The pump does not
provide sufficient
pressure.
Air may be trapped
in the pipework. The pump may have not been primed
correctly and there is potential of
air still in the suction pipeline.
1. Check the pressure gauge on the side
of the pressure control to determine if
that model pump is operating correctly
when referencing its pump curve.
2. Bleed air from system while the suction
line is connected to the pump:
a) Above ground tank: Remove
priming plug on pump casing. Allow
water to flow through via gravity
until all air has been expelled.
b) Below ground tank: Ensure foot valve
is installed and not leaking through
damage or debris. Fill up suction
line and casing from priming port.
3. Activate all appliances/outlets
sequentially from the nearest to the
furthest outlet. Repeat if necessary.
4. If problem persists, please contact
the Reece branch where the
pump was purchased from.
Refer to page 16 for more information
on priming the pump.
The suction pipe
internal diameter
may be too small. A suction pipe size that is too small will cause
high pressure loss or cavitation. Increase the
pipe size to an internal diameter that is the
same size as the suction inlet, or larger.
Note: This means for a 25mm inlet pump
a 32mm PN12.5 Poly Pipe must be used.
Debris may be caught
in the pump impeller. Check for solid objects that may
be blocking the impellers.
1. Disassemble pipework and pump housing.
2. Clean impellers.
It is recommended to call a pump
technician or licensed professional.
TROUBLESHOOTING
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VADA FLOW BOSS HORIZONTAL MULTISTAGE PUMP VFB-HM80 INSTALLATION MANUAL
SYMPTOM CAUSE SOLUTION SYMPTOM CAUSE SOLUTION