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050407.01
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DWSC Drinking water tank systems 120 litres
ENGLISH
5 Winter lay-up
The tank, pipes, pump, etc. must always be drained completely.
5.1 Draining the pressurized water system
• Open a tap so that the pump will run; let the pump continue to
run for about 30 seconds after the tank is empty.
• Disconnect the power to the pump.
5.2 Anti-freeze
Never fill the drinking water system with anti-freeze to protect it
against freezing unless a safe non-toxic anti-freeze for potable water
is available. Most anti-freezes are very poisonous!
Flush the drinking water system thoroughly at the start of the sum-
mer season, if a non-toxic anti-freeze for potable water has been
used to protect the system during the winter.
6 Maintenance
Check the breather nipple regularly and clean the sieve of the breath-
er nipple if necessary. Check the hoses and hose connections for pos-
sible leaks annually and fit new hoses and/or hose clamps as neces-
sary.
Also check the tank for damage as a result of chafing. Replace a dam-
aged tank immediately.
Carry out the disinfection procedures described under ‘Use’ at the be-
ginning of the sailing season.
A tank and installation that is strongly contaminated by algae can be
cleaned by rinsing the tank, the pump and pipes with chlorine water.
Problem
Possible cause
Solution
Motor runs but there is no flow
of water.
Empty water tank
Fill the tank or disconnect the power to the pump.
Inlet / outlet tube restriction.
Remove restriction.
Strainer clogged with debris.
Clean strainer.
Leak in the suction pipe.
Tighten the hose clamps and check the fittings.
Motor does not run
No power on pump circuit.
Check wiring, fuse or circuit breaker.
Loose or corroded electrical connections.
Check the electrical connections.
Short circuit in wiring.
Check condition of wires.
Thermal protection of motor has been activated
(motor is too hot).
Wait until there is an automatic reset.
Faulty motor.
Replace pump.
Faulty pressure switch.
Replace pressure switch assembly.
Locked drive.
Replace pump.
Pump continues to run after all
taps have been closed.
Empty water tank
Refill.
Pump cycles while tap is closed. Leak in the system.
Tighten leaking hose clamps / fittings.
Faulty pressure switch.
Replace pressure switch assembly.
Incorrect voltage.
Check voltage (± 10 %).
Air trapped in system.
Open a tap as close to the pump as possible.
Leak in outlet tubing.
Check plumbing for leakage.
Low pump capacity or pressure. Dirt in inlet filter.
Remove cover and clean filter.
Worn wobble plate.
Replace pump.
Worn diaphragm.
Replace pump.
Inlet / outlet tube restriction.
Remove restriction.
Inlet air leak.
Tighten fittings / Replace cracked fittings.
Faulty pressure switch.
Replace pressure switch assembly.
Incorrect voltage.
Check voltage (± 10 %)
Pump leaks.
Loose fasteners.
Tighten fasteners.
Pump seals degraded.
Replace pump.
Leak in diaphragm.
Replace pump.
Noisy or rough operation.
Loose pump head.
Tighten fasteners.
Rigid plumbing.
Plumb pump with flexible plumbing.
7 Problem solving
W
arning
Disconnect the power and drain the system before beginning work on the pump!