110133.02
5
Electric diaphragm pump EMP140B
2.3 Piping
For piping diagrams see page 14.
For the piping use internally reinforced hose with an inside diameter
of 38 mm (1 1/2’’). Non-reinforced hose will easily kink or possibly
even become ‘strangled’ when used at the inlet side.
Keep the length of the hoses, especially near the pump, of sufficient
length, so that both the pump and the suction hose can be brought
above the fluid level in the tank.
Avoid sharp bends in the hoses.
Mount all connections with a good quality type of hose clamps and
use 2 per connection; each leakage will result in an unpleasant odour!
To prevent an unpleasant odour the through-hull fitting must be
positioned
below the waterline
.
Always
fit a seacock on top of any
through-hull fitting wich is positioned below the water line.
Installation of a U-bend with air vent (or vent line) in the outlet hose
is necessay if (at any angle of heel):
- the level of the fluid to be pumped is below the waterline
- the outlet through-hull fitting is installed below the waterline
Such installation prevents siphoning.
Interchanging the inlet and outlet valve is not possible !
Changing the flow direction, compared to the position of the mount-
ing base, is only possible by re-installation of the pump housing to
the bell housing in the other position.
2.4 Electrical installation
Make sure that the voltage stamped on the electric motor is identical
as the ship’s power supply voltage.
The minimum cross-section for the connecting cables is 2.5 mm
2
(AWG 14). The voltage drop between the battery and the pump
should not exceed 10% of the supply voltage. For a 12 Volt installa-
tion with a total cable length (positive and negative wiring added
together) of more than 19 m use cable with a cross-section of 4 mm
2
.
(or more than 50 ft: use AWG 12).
Connect the power supply as shown in the wiring diagram. See draw-
ing at page 15.
A main switch* and a fuse** must be incorporated in the positive ca-
ble.
*) The switch must be rated for 10 Amps.
**) Fuse:
10 Amps for 12 Volt system
7.5 Amps for 24 Volt system
W
arning
The electric motor may become hot when used for a longer pe-
riode of time! Make sure that electric wiring etc. does not get in
contact with the motor housing.
3
Maintenance
- Always flush a holding tank connected to the electric diaphragm
pump after discharge. Pump the flush water away by switching on
the pump; remaining contaminants in pump and hoses will also
be flushed.
- Contaminants left behind in the valves of the pump this may result
in a decreased capacity of the pump.
- Clean the valves if necessary. Thereto remove the relevant hose pil-
lar, remove the valve and clean it. Re-assemble in reverse order.
- If the installation is not used for a longer period of time, the pump
must be operated regularly. By doing so a proper functioning of
the valves is ensured.
4
Winterising
The whole waste system should always be drained to prevent dam-
age caused by freezing.
Draining
Remove the suction hose and run the pump for a few minutes until
it is dry.
5
Technical data
Electric motor
Type
:
Permanent magnet DC motor
Voltage
:
12 V DC
24 V DC
Current (maximum) :
8 A
5 A
Pump
Type
:
Self-primimg diaphragm pump
Capacity,
at 0 m head
: 27 I/min (5.9 Imp. Gal/min, 7.1 US Gal/min)
Max. suction height :
3 metres column of water (10’)
Max. head
:
5 metres column of water (16’5”)
Max. suction height
+ head
:
5 metres column of water (16’5”)
Material
Pump housing
:
Plastic
Hose pillars
:
Plastic
Diaphragm
:
Neoprene rubber
Valves
:
Natural rubber 60-65˚SH.
Bell housing
:
Aluminium, coated
Connections
For hose
:
38 mm ID (1 1/2”)
Weight
:
3.7 kg (8.1 Ibs)
ENGLISH
