AL-KO HW 3500 - Инструкция по эксплуатации - Страница 15

Startup

457 775_a

15

Switch the pump off

1. Remove the mains plug from the socket
2. Close  one  of  the  closing  off  devices  (valve,

spray nozzle, water cock) in the pressure line

(Fig. B -10)

.

ADVICE

If no suction takes place within a period

of  180  seconds,  the  garden  pump  au-

tomatically  goes  to  "fault"  condition  and

switches off.

CAUTION!
Danger of injury from hot water

In extended use against the closed pres-

sure  side  (>10  min.),  the  water  in  the

pump can be severely heated up and can

be  emitted  in  an  uncontrolled  manner!

Isolate the unit from the mains and allow

the pump and water to cool down. Start

the unit again only after all the faults have

been rectified!

The risk of injury from hot water can arise if:

the installation is not correct
the pressure side is closed off
there is a lack of water in the suction line, or if
the pressure switch is defective.

Procedure

1. Isolate the unit from the mains and allow the

pump and water to cool down.

2. Check  the  unit,  the  installation  and  water  le-

vel.

3. Start  the  unit  again  only  after  all  the  faults

have been rectified!

MAINTENANCE AND CARE

Check the air pressure in the storage vessel.

CAUTION!

Check  the  air  pressure  in  the  storage

vessel at regular intervals. It must not fall

below 1.5 bar (see section "Commissio-

ning:  Checking  the  air  pressure  in  the

storage vessel").

1. Isolate  the  house  water  system  from  the

mains and secure against switching on again.

➯

The pump stops automatically.

2. Open  one  of  the  closing  off  devices  (valve,

spray nozzle, water cock) in the pressure line

(Fig. B -10)

.

3. Drain the water off until the pump is comple-

tely empty.

4. Open  the  cover  on  the  back  of  the  storage

vessel.

5. Check the air pressure at the valve with an air

pump or a tyre pump with pressure indicator.

➯

If necessary, correct the air pressure.

6. Then close the cover again on the back of the

storage vessel.

7. Start the house water system again.

Cleaning the pump

ADVICE

After  conveying  swimming  pool  water

containing chlorine or fluids that leave a

residue,  the  pump  must  be  flushed  out

with clear water.

1. Isolate  the  unit  from  the  mains  and  secure

against switching on again.

➯

The pump stops automatically.

2. Flush the pump out with clear water.
3. Insert the mains plug into the plug socket.
4. Switch  the  house  water  system  on  with  the

on /off switch 

(Fig. A -6)

.

➯

The pump starts automatically.

Remove blockages

1. Isolate  the  unit  from  the  mains  and  secure

against switching on again.

2. Remove the suction hose from pump inlet.
3. Connect the pressure hose to the water sup-

ply.

4. Allow water to run through the pump housing

until the blockage is removed.

5. Check that the pump is running freely by swit-

ching it on briefly.

6. Start the house water system again as descri-

bed.

Pressure Switch

ADVICE

The switch-on and switch-off pressure of

the house water system is pre-set in the

factory. Any changes that may be requi-

red should only be made by the specia-

list dealer.