Rev. B 08-2017
13
MTEC.4680.GB-B-1 Operation and maintenance manual GH serie English
GH
Dehumidi
fi
ers for radiant cooling system
removed for differential disposal, class G3, according to EN 779:2002.
3.1.9 Microprocessor
All units are equipped with a microprocessor for controlling the timing of the compressor, defrosting cycles and alarms. A special card with
light signals indicates the presence of the supply voltage, the activation of defrosting cycle or the presence of an alarm.
3.1.10 Electric box
The electric switch board is made according to electromagnetic compatibility norms CEE 73/23 and 89/336. The accessibility to the board
is possible after removing the front panel of the unit. Ready for the connection to the power and to the consensus control, The terminal
board is also supplied with voltage free contacts for remote ON-OFF. The terminal block is also arranged with two (2) free contacts to allow
operation in ventilation mode only (the 1st) in cooling mode operation (version WZ) the 2nd. Closing the
fi
rst contact, it will be enabled for
operation in fan only while the dehumidi
fi
cation function will be disabled.
3.1.11 Control and protection devices
All units are supplied with the following control and protection devices: defrost thermostat, who signals to the microprocessor control that a
defrost cycle is needed and controls its termination (only for models 100-100W and 200-200W). Water temperature sensor, that signals to
the microprocessor the eventual overcome of the hot water temperature set point in the pre and post water coils during winter operation. In
this condition the compressor is disconnected while the fan always run and, when the water temperature returns within the operation limits,
restarts the compressor. The water sensor stops the compressor when the water temperature is above 35°C. The eventual use of of the
dehumidi
fi
er as heating device during winter season requires an additional remote thermostat with seasonal change over (not supplied).
3.1.12 Test
All the units are fully assembled and wired at the factory, carefully evacuated and dried after leak tests under pressure and then charged
with ecologic refrigerant. They are all fully operational tested before shipment. They all conform to European Directives and are individually
marked with the CE label and provided with Conformity Declaration.
3.2 Versions
3.2.1 WZ
Units supplied with double condenser (the
fi
rst is an air condenser, the second is a water one) and of a logic which allows the dehumidi
fi
-
cation with neutrum air or with cooled air.
3.3 Accessories
3.3.1 Remote mechanical hygrostat (HYGR.20) (for standard versions only)
To be installed on the wall, it is supplied with a regulation knob and working range from 30% to 100% with precision of 3%.
3.3.2 Remote mechanical hygrostat (HYGR.30) (for WZversion only)
To be installed on the wall, it is supplied with a regulation knob and working range from 30% to 100%.
Temperature working range from 10°C to 35 °C with precision of 3%.
