Rev. B 06-2019
13
MTEC.6710.GB-B-1 Operation and maintenance manual HMA/Z series English
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with temperature control
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the use of low rotation speed (and hence low noise) fans. The fans are direct drive, axial type with aluminium aerofoil blades and are com-
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pressure control. This device maintains a constant condensing pressure, independant of changes in ambient temperature.
3.1.10 Control and protection devices
All units are supplied with the following control and protection devices: antifreeze protection sensor, high pressure switch with manual
reset, low pressure switch with automatic reset, high pressure safety valve, compressor thermal overload protection, fans thermal overload
protection.
3.1.11 Z Version
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refrigerant lines. The use of remote condenser allows the simultaneous control of temperature and humidity, working in cooling or in dehu-
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3.1.12 Test
All the units are fully assembled and wired at the factory, the refrigerant circuit is pressure tested to check for leaks then evacuated and
charged with the correct weight of R410a. They are all fully operational tested before shipment. They all conforms to European Directives
and are individually marked with the CE label and provided with Conformity Declaration.
3.2 Accessories description
3.2.1 Electronic temperature and humidity probe (RGDD)
Built-in Electronic temperature and humidity probe.
3.2.2 Remote control panel (PCRL)
This panel can be mounted up to 50m (maximum) from the unit and replicates all of the control functions. It is connected using a twin cable
of 0.5 mm sq section.
3.2.3 Serial interface card RS485 (INSE)
This interface card enables the controller to comunicate with other devices using Modbus protocol.
3.2.4 E.C. Supply fan (V1CE)
The supply fan is a high performance centrifugal type, double inlet forward curved blades, directly coupled to the electric motor. The fan
wheel and the scroll are made from hot galvanised thick sheet metal, painted with polyurethane powders, to ensure the best resistance
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of the windings and the absence of power lost due to pulleys and belt transmission. The fan is statically and dynamically balanced class 6,3
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out thermal protection (in case of considerable reduction of the power supply), protection degree IP54, serial interface card with modbus
protocol RTU.
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3.2.6 Rubber vibration dampers (KAVG)
To be installed beneath the unit base and the ground to avoid the transmission of vibrations (and the noise) to the building.
3.2.7 Stainless steel frame (INOX) (Indoor unit)
It’s used to ensure the best resistance against the atmospheric agents and the operation in aggressive enviroments. The frame is made of
stainless steel AISI 304, self-supporting with removable panels to facilitate inspection and maintenance of internal components. All screws
and rivets are in stainless steel.
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