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Metabo HWW 3000-20G Manual

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ENGLISH
(Pump characteristic curve for 0.5 m
suction head and 1" suction hose.)
(Pump characteristic curve for 0.5 m
suction head and 1" suction hose.)
6.1 Commissioning
3
Note:
The pressure switch
starts the pump when, by drawing
water, the water pressure in the tank
falls below the cut-in pressure;
stops the pump when the cut-out
pressure is reached.
3
Note:
In the tank is a rubber bag, fac-
tory-charged with air ("precharge pres-
sure"); this permits the drawing of small
amounts of water without the pump start-
ing up.
1. Plug power cable in.
2. Open pressure line (open tap or
spray nozzle).
3. Check to see that the water comes
out!
A
Danger!
Prior to all servicing:
1. Turn OFF.
2. Unplug.
3. Ensure that pressure is relieved
from the pump and connected
accessories.
Service and repair work other than
described here must be left to quali-
fied specialists.
7.1 Danger of Ffreezing
A
Caution!
Frost damages the pump and
accessories, as both always contain
water!
x When there is danger of freezing,
dismount the pump and accessories
and store at a frost-free location
(see below).
7.2 Pump Dismounting and
Storing
1. Turn pump OFF and unplug.
2. Open pressure line (open tap or
spray nozzle) and drain water com-
pletely.
3. Completely drain pump and tank; to
do so remove the drain plug from
the underside of the pump.
4. Disconnect suction and pressure
lines from the pump.
5. Store pump in a frost-free location
(at least 5 °C).
A
Danger!
Prior to all servicing:
1. Turn OFF.
2. Unplug.
3. Ensure that pressure is relieved
from the pump and connected
accessories.
8.1 Locating the Fault
Pump does not run:
No mains voltage.
• Check cables, plug, outlet and
mains fuse.
Mains voltage too low.
• Use only extension cables with
sufficient lead cross section (see
"Technical Specifications").
Motor overheated, motor protection
relay tripped.
• After cooling off the pump will
start again.
• Ensure sufficient ventilation, keep
vent slots clear.
• Observe max. temperature of the
pumped medium.
Motor hums but does not start.
• With the motor turned OFF, put
screwdriver or similar through the
fan cover's ventilation slots and
turn the fan.
Pump blocked or out of order.
• Disassemble pump and clean.
• Clean diffusor, replace if neces-
sary.
• Clean impeller, replace if neces-
sary.
Pump does not prime correctly or
runs very noisily:
Lack of water.
• Ensure there is a sufficient water
supply.
Suction line leaky.
• Seal suction line, tighten screw
fittings.
Suction head too high.
• Observe max. suction head.
• Install check valve, fill suction line
with water.
Suction strainer (optional acces-
sory) blocked.
• Clean, replace if necessary.
Check valve (optional accessory)
blocked.
• Clean, replace if necessary.
Water leaks between motor and
pump, Duocone seal worn.
• Replace Duocone seal.
Pump blocked or out of order.
• see above.
Pressure too low:
Suction line leaky or too much suc-
tion head.
• see above.
Pump blocked or out of order.
• see above.
Pressure switch incorrectly
adjusted.
• Check cut-in pressure and cut-
out pressure, adjust if necessary.
Pump starts even when drawing
only a small amount of water
(approx. 0.5 l).
• Too little precharge pressure in
the tank; increase.
Water dripping from air charging
valve.
• Rubber bag in tank leaky;
replace.
8.2 Adjusting the Pressure
Switch
If – in time – the factory-set cut-in pres-
sure or cut-out pressure has changed
considerably, the original setting can be
restored (see "Technical Specifica-
tions").
B
Danger!
Risk of electric shock by the
terminals inside the pressure switch.
Only qualified personnel is allowed to
open and adjust the pressure switch.
1. Remove the pressure switch cover.
2. Open pressure line (open tap or
spray nozzle) and let run water.
When the pump starts, read the cut-
in pressure on the pressure gauge.
3. Close the pressure line again.
7. Care and Maintenance
8. Trouble Shooting
… 13 …


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