BlueCool S-Series 21
8 Dehumidification
In the dehumidification operating mode F7, the BlueCool air con-
ditioning system can control the heating and cooling on the boat
in the absence of the crew, removing humidity from the cabin air
in the process. For this purpose, the air-conditioning system runs
in heating mode for a set period of time and then in cooling
mode. In cooling mode condensation forms on the heat exchang-
er, thus drying the cabin air. The heat/cooling cycles can be acti-
vated up to 3 times in 24 hours. There must be sufficient power
available for the air-conditioning system. Dehumidification mode
cannot run simultaneously with regular air conditioning; simulta-
neous temperature control is not possible. Dehumidification does
however take place in regular cooling mode.
Settings
It may be necessary to enter further system settings before dehu-
midification can run. The is generally already done during the in-
stallation/commissioning phase. Setting level 3 must be called up
if the system parameters need to be changed, see chapter “7.6
Setting level 3 (Parameter menu)” on page 20.
To achieve efficient operation of the dehumidification cycle
throughout the boat, the same settings should be chosen for all
components of the air conditioning system.
Selecting the dehumidification profile
The system can be set such that it starts dehumidification mode
once, twice or three times in a 24-hour period or there is no dehu-
midification at all. To change the cycles you need to set the num-
ber of cycles per day in setting level 3 under the parameter “Dehu-
midification cycle”. See “7.5.2 Dehumidification cycle” on page
20.
Synchronising all installed BlueCool air conditioning system
components
If the entire boat is to be optimally dehumidified, it is expedient to
switch off all the BlueCool S-Series self-contained air-conditioning
units in succession at the control elements, within a few seconds
of each other, using On/Off. All BlueCool S-Series air conditioning
plants switch on simultaneously when the previously selected de-
humidification cycle starts and then switch off again automatical-
ly. If all control elements are not switched off simultaneously, the
BlueCool S-Series self-contained air-conditioning units will start
the dehumidification cycle at different times. This will restrict the
dehumidification efficiency.
Operating restrictions - extreme climatic conditions
The dehumidification cycle is designed for use in temperate cli-
matic regions where extreme weather conditions are not expect-
ed. In the dehumidification cycle, the air-conditioning system runs
in both heating as well as cooling mode and may therefore not
function correctly if the temperature of the sea water is either too
high or too low. At low sea water temperatures, the system oper-
ates inefficiently in heating mode and there is a danger that the
sea water could freeze in the condenser. As a precautionary meas-
ure, the air conditioning system may therefore switch off at low
water temperatures (at approx. 6 °C and below) (Fault message
A01 - low pressure compressor). Heating mode may switch off
(Fault message A02 - high pressure compressor) at high sea water
temperatures (above 25 °C) as the air conditioning system is de-
signed to produce heat under cold climatic conditions where sea
water temperatures in excess of 25 °C are unlikely.
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