Manual Metabo HWW 5500-20 M (page 12 of 68) (English, German, Dutch, Danish, French, Swedish, Spanish, Finnish)

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ENGLISH

Note:

In the tank is a factory-

pressurized rubber bag ("air charge");

this enables the drawing-off of small

amounts of water without starting the

pump.

1. Plug power cable in.

2. Open pressure line (open tap or

spray nozzle).

3. Check to see the water comes out!

6.2 Pump characteristic

curve

The pump characteristic curve shows

which pump capacity is possible in

dependance on the delivery head.

Pump characteristic curve at 0.5 m suc-

tion head and 1" suction hose – for

model:

HWW 5500/20 M, …/50 M

Danger!

Prior to all servicing:

− Unplug.

− Ensure that pressure is relieved

from equipment and connected

accessories.

Repair and maintenance work other

than described here must only be car-

ried out by qualified specialists.

7.1 Periodic maintenance

• Check equipment and accessories,

especially electrical parts and parts

under pressure for possible dam-

age; have repaired, if necessary.

• Check suction and pressure lines for

leakages.

• If the pump capacity lessens clean

suction strainer and filter cartridge (if

installed), replace if necessary.

• Check air charge of tank, increase if

necessary (see "Increasing the air

charge").

7.2 Danger of freezing

Caution!

Frost damages the pump and

accessories, as both always contain

water!

• When there is danger of freezing,

dismount equipment and accesso-

ries and store at a freeze-proof loca-

tion (see below).

7.3 Equipment dismounting

and storing

1. Unplug.

2. Open pressure line (open tap or

spray nozzle) and drain water com-

pletely.

3. Drain pump and tank completely. To

do so,

− remove the drain plug from the

pump (except HWW 3300/20 K),

− loosen the union nut of the flexi-

ble metal hose at the tank.

4. Disconnect suction and pressure

lines from the equipment.

5. Store equipment in a frost-free

space (at least 5 °C).

Danger!

Prior to all servicing:

− Unplug.

− Ensure that pressure is relieved

from equipment and connected

accessories.

8.1 Fault finding

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

switch ON again.

− Ensure sufficient ventilation, keep

vent slots clear.

− Observe max. temperature of the

pumped medium.

• Motor hums but does not start.

− With the motor switched OFF, put

screwdriver or similar through the

fan cover's vent 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 (accessory)

blocked.

− Clean, replace if necessary.

• Check valve (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 or pump running

continuously:

• Suction line leaky or too much suc-

tion head.

− see above.

• Pump blocked or out of order.

− see above.

• Pressure switch misadjusted.

− Check cut-in and cut-out pres-

sure, readjust if necessary.

• Pump starts after only a minimal

amount of water (approx. 0.5 l) has

been drawn off.

− Air charge in tank too low;

increase.

• Water

drips form air charging valve.

− Rubb

er bag in tank leaky;

replace.

8.2 Pressure switch adjust-

ment

If – during time – the factory-set cut-in

and cut-out pressure changes consider-

ably, it can be readjusted to the original

setting (see "Technical Specifications").

Danger!

Risk of electric shock when

touching the terminal inside the pres-

sure switch. Only qualified service

technicians are permittted to open

and adjust the pressure switch.

1. Remove the pressure switch cover.

2. Open pressure line (open tap or

spray nozzle) and drain water com-

pletely.

When the pumps starts, note cut-in

pressure indicated by the pressure

gauge.

3. Close pressure line.

When the pumps stops, note cut-out

pressure indicated by the pressure

gauge.

7. Care and Maintenance

8. Trouble Shooting

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Metabo HWW 5500-20 M Manual

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