Buoyancy Chamber - Zodiac YACHTLINE 440 Eignerhandbuch

CORRECT PRESSURE
The correct pressure for the buoyancy chamber is 240 mb/ 3.4 PSI.
The ambient temperature of the air or the
water proportionally influences the
internal pressure of the buoyancy
chamber:
Thus, it is important to anticipate:
Check and adjust the pressure of inflatable compartments (by inflating or deflating)
depending on the temperature (particularly when temperature variations are high
between the morning and evening in hot regions) and check that the pressure does not
leave the recommended pressure zone (from 220 to 270 mb / green zone).
LOW PRESSURE RISK:
EXAMPLE: Your boat is exposed to direct sunlight on the beach (temperature=50°C)
at the recommended pressure (240 mb/3.4 PSI). When you launch it (temperature=20°C), the
temperature and internal pressure of the inflatable compartments will drop simultaneously (up
to 120 mb) and YOU WILL THEN NEED TO REINFLATE until you regain the millibars
lost due to the difference between the ambient air and water temperatures. It is normal to
observe a drop in pressure at the end of the day when the outdoor temperature drops.
RISK OF OVERPRESSURE:
EXAMPLE: Your boat is inflated to its recommended pressure (240 mb/3.4 PSI) at the
beginning or end of the day (low outside temperature = 10°C). Later in the day, your boat is
left in the sun on the beach or on the deck of a boat (temperature = 50°C) The temperature
inside the inflatable compartments may rise to 70°C (particularly for dark buoyancy chambers),
doubling the initial pressure (480 mb). YOU WILL THEN NEED TO DEFLATE the boat to
return to the recommended pressure.
IF YOUR BOAT IS OVERINFLATED, THE PRESSURE WILL ABNORMALLY
WEAR THE INFLATABLE STRUCTURE WHICH MAY LEAD TO A BREACH
WARNING
OF THE ASSEMBLY.
BUOYANCY CHAMBER - PRESSURE
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Ambient temperature
+1°C
-1°C

Buoyancy chamber

internal pressure
+4 mb / 0.06 PSI
-4 mb / 0.06 PSI