Advertisement
Maintenance
WARNING! Before removing black plastic
cap, be sure to turn off the electrical supply.
Periodically check electric connections and check
that all the pipe fittings are watertight. Replace any
corroded or damaged nut/bolt and screw fasten-
ings. For any ordinar y maintenance follow the
instructions manual, but the assistance of author-
ized ser vice personnel is advisable for any special
maintenance.
WARNING! Empty the water heater ever y
time the temperature in its location goes below
zero °C. The water heater might be irreparably
damaged if water inside it freezes.
WARNING! All QL water heaters are heat
insulated with auto-extinguishable cellular poly-
urethane; since this material produces small
quantities of toxic gas at temperatures that exceed
500°C, any work that produces high temperatures
(welding, scoring, drilling, etc.) must not be
executed in closed confined areas.
To replace thermostat:
1. Remove plastic cap by unscrewing the two
screws.
2. Disconnect cylindrical Fast-on contacts of
mains indicator lamp and unscrew electric
contact screws. Ensure that any exposed wires
are protected.
3. Place a screw driver between thermostat and
electric heating element to prize up the thermo-
stat.
4. To remount the thermostat, follow the instruc-
tions the opposite way round, taking particular
care that the thermostat contacts are correctly
connected to the elements' Fast-On contacts.
To replace electric heating element:
• Proceed as in points 1–3 above
• Unscrew electric heating element with a 56 mm
socket spanner or similar tool. If difficult to
unscrew, heat nipple between electric heating
element and water heater.
• Before replacing element, seal threading with
oakum or Teflon.
To empty the water heater:
WARNING! Ensure that the power supply is
disconnected so that the water heater cannot be
accidentally switched on when empty.
• Cut off the water supply to the water heater.
• Open the safety/non return valve by lifting the
valve lever (ensure that water outlet is directed
towards the bilge).
• Loosen the pressure relief valve, if mounted, or
disconnect hot water pipe fitting (red rubber
washer, see plumbing connection diagram point
1) until the water heater begins to empty.
English
5
Advertisement
