Elektro Maschinen WPEm 7000/100R, Operating Instruction

Page: 12 / 48

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.
Switching intervals becoming more
frequent
(domestic water system clocks):
Tank precharge pressure too low.
• Drain water completely from tank
and correct precharge pressure.
The precharge pressure must be
between 1.2 and 1.8 bar.
Water leaking.
• The rubber bag inside the tank
needs to be replaced.
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 drain water com-
pletely.
When the pumps starts, note cut-in
pressure indicated by the pressure
gauge.
3. Close the pressure line again.
When the pumps stops, note cut-out
pressure indicated by the pressure
gauge.
A
Caution!
The factory-set cut-out pres-
sure must not be exceeded.
4. To change the cut-out pressure, turn
nut
(12)
turn clockwise to increase the
cut-out pressure;
turn counter-clockwise to reduce
the cut-out pressure.
5. To change the cut-in pressure, turn
nut
(13) as follows:
turn clockwise to increase the
cut-in pressure;
turn counter-clockwise to reduce
the cut-in pressure.
6. If necessary, repeat steps 2.
through 5. until the desired values
are set.
7. Replace the pressure switch cover.
8.3 Increasing the Precharge
Pressure
When – in time – the pumps starts after
only small amounts of water are drawn
(approx. 0.5 l), the precharge pressure
in the tank must be restored to the origi-
nal level.
3
Note:
The air charge pressure can not
be taken from the pressure gauge.
1. Unplug.
2. Open pressure line (open tap or
spray nozzle) and drain water com-
pletely.
3. Unscrew the plastic cover on the
front side of the tank; the charging
valve is located behind itl.
4. Connect air pump or compressor
hose with a "car tyre" type connector
and pressure gauge to the charging
valve.
5. Inflate to the intended precharge
pressure (see "Technical Specifica-
tions").
6. Plug pump in again and check func-
tion.
A
Danger!
Repairs to electric tools must
only be carried out by a qualified
electrician!
Electric tools in need of repair can be
sent to an authorized service center in
your country. See spare parts list for
address.
Please attach a description of the fault to
the electric tool.
The packaging of the pump can be
100 % recycled.
Worn out power tools and accessories
contain considerable amounts of valua-
ble raw and plastic materials, which can
be recycled.
13 12
9. Repairs
10. Environmental Protection
EN