Preparation Of The Water Circuit For The Winter Period - Vitrifrigo MACS 7 Serie Manuel D'installation

If any object (algae or more) beyond the filter and hang in the pump impeller, it will be necessary a check of
the pump. In that case, detach the hose from the pump outlet and check that the water rise up to the water
line of the boat. If this does not occur, the pump is obstructed. To clean the pump, follow the instructions on
its maintenance booklet.
Hydraulic fittings
Periodically check that all hydraulic connections are sealed and that sea water flows overboard when the AC
unit runs.
Electric parts
Before doing any inspection or maintenance operation of electrical parts, disconnect power
from AC unit.
Periodically check the status of electrical connections, because vibrations could loosen some contacts,
causing functioning problems. Electrical parts should also be kept clean and dry.
Periodically check for electrical dispersions. If they occur, they must be eliminated immediately.
Finally, ensure that power supply voltage is correct: main components (compressor, pump, fan, etc..)
generally tolerate a difference of ± 10% compared with the nominal voltage value.
Refrigerant
The AC unit is factory-charged with the right amount of refrigerant. Normally, refrigerant charge should
remain constant all over the life of air conditioner.

18.1 Preparation of the water circuit for the winter period

If the boat remains in the water during the winter
In-water storage requires the use of an anti-freeze solution throughout the system's water circuit. Be sure to
follow all local ordinances before discharging an anti-freeze solution overboard.
- Close ball valve;
- Open the sea-water strainer, remove and clean its basin. Then close the strainer.
- Disconnect water line at ball valve and insert pipe into a bucket of anti-freeze solution.
- Run AC unit until a flow of anti-freeze solution is being discharged overboard
- Reconnect water line at ball valve.
When you re-starting the AC unit after winter, please follow the start-up instructions in this manual.
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