Rev. B 08-2017
16
1
2
3
5
4
8
9
7
10
MTEC.4680.GB-B-1 Operation and maintenance manual GH serie English
GH
Dehumidi
fi
ers for radiant cooling system
3.5.2 Refrigerant circuit layout WZ version
The operation of the dehumidi
fi
er is as follows: the fan takes the air from the ambient (7) and it’s made go through the
fi
lter (1) and the pre-
cooling water coil (2) where it’s cooled and brought to a condition closed to saturation. Now it passes through the evaporating coil (3) where
it’s fatherly cooled and dehumidi
fi
ed. At this point there are two possible modalities:
• Modality with neutrum air: The air passes now through the condensing coil (5) which allows to condensate the 50% of the total gas, (the
unit condensate the 50% on air with the heat exchanger (5) and the 50% in water with the heat exchanger (10)) then there is the post-
heating so that to avoid to send air in the ambient in neutrum thermic conditions.
• Modality with cooled air:The unit condensates the 100% in water through the heat –exchanger (10). The air, then, go through the conden-
ser (5) (disabled) where does not change its characteristics (temperature and humidity).
• Dehumidi
fi
cation with Air Heated mode: The unit in this case performs 100% of the condensation in the air with the heat exchanger (5)
then the air at the evaporator outlet (3) passes through the condenser (5) that heats the air at constant humidity and then, the air that will
be injected into the room has the same moisture that has output from the heat exchanger (3) but at a higher temperature.
WZ versions can work with air dehumidi
fi
cation mode with cold air only if feed by the water plant (normally
around 15 ÷ 18°C). In the absence of cold water, the units must be switched manually in winter mode, to operate
in dehumidi
fi
heating.
