Zodiac NZO 760 Eignerhandbuch Seite 78

CORRECT PRESSURE
The correct pressure for the buoyancy chamber is 240 mb/ 3.4 PSI.
The ambient temperature of the air or
water proportionately influences the
level of internal pressure in the
buoyancy chamber
Thus, it is important to anticipate:
Check and adjust the pressure of the inflatable compartments (inflating or deflating
according to the case) according to the temperature variations (especially when there is
a considerable difference in temperature between morning and evening in particularly
hot areas) and make sure that the pressure remains within the recommended pressure
range (from 220 to 270 mb / green sector).
RISK OF UNDERPRESSURE:
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. A drop in pressure
at the end of the day, when the outside temperature is dropping, is normal.
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
exposed in the sun on the beach or on a yacht deck (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, THERE WILL BE UNDUE PRESSURE
ON THE INFLATABLE STRUCTURE THAT MAY RUPTURE IT.
WARNING
BUOYANCY CHAMBER - Pressure
Ambient temperature
Page 17/ 58
Buoyancy chamber
internal pressure
+1°C +4 mb / 0.06 PSI
-1°C -4 mb / 0.06 PSI
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