HIdRos LZT 05, Техническое руководство

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LZT
High efficiency air to water heat pumps
MTLZTGB REV.012008
29
ELECTRICAL CONNECTIONS
It must be verified that electric supply is corresponding to the unit electric nominal data (tension, phases, frequency) reported on the
label in the front panel of the unit. Power connections must be made in accordance to the wiring diagram enclosed with the unit and
in accordance to the norms in force. Power cable and line protection must be sized according to the specification reported on the
form of the wiring diagram enclosed with the unit.
WARNING: The line voltage fluctuations can not be more than ±5% of the nominal value, while the voltage
unbalance between one phase and another can not exceed 2%. If those tolerances should not be
respected, please contact our Company.
WARNING: Electric supply must be in the limits shown: in the opposite case warranty will terminate
immediately. Before every operation on the electric section, be sure that the electric supply is
disconnected.
WARNING: The Flow switch must be connected following the indication reported in the wiring diagram.
Never bridge the flow switch connections in the terminal board. Guarantee will be invalidated if flow
switch connections are altered or not properly made.
WARNING: The remote control panel is connected to the water chiller by 2 wires of 2,5 mm
2
section.
Power supply cables must be separated by remote control wires. Maximum distance 50 metres.
WARNING: The remote control panel can not be installed in area in with strong vibrations, corrosive
gases, excess of dirtiness or high humidity level. Leave free the area near the cooling openings.
START UP
Before start-up
•
Check that all power cables are properly connected and all terminals are hardly fixed.
•
The voltage at the phase R S T is the one shown in the unit labels.
•
Check that there is not any refrigerant leakage.
•
Check that crankcase heaters are powered correctly.
•
Check that all water connections are properly installed and all indications on unit labels are observed.
•
The system must be bleed off in order to eliminate any air.
•
Before start up check that all the cover panel are re-located in the proper position and locked with fastening screws.
WARNING: Crankcase heaters must be powered at least 12 hours before start up by closing the main
switch (heaters are automatically supplied when main switch is closed). The crankcase heaters are
working properly if after some minutes the compressor crankcase temperature is about 10÷15°C higher
than ambient temperature
Start up and switch off
Push for 5 seconds to run the unit in heating mode. Push the same key for 5 seconds to switch off.
Push for 5 seconds to run the unit in cooling mode. Push the same key for 5 seconds to switch off.
WARNING: Never switch off the unit (for temporary stop), by opening the main switch: this component
should be used only to disconnect the unit from power supply when the current is not passing through,
i.e. when the unit is in OFF mode. Moreover, with no supply to crankcase heater, at the unit start up,
compressor could be seriously damaged.
WARNING: Do not modify internal wiring of the unit otherwise warranty will terminate immediately.
WARNING: The summer/winter operation must be selected at the beginning of the related season.
Frequent change over of the seasonal operation mode must be avoided in order to prevent severe damage
to compressors.