MAXA i-HP 0235, Руководство пользователя и инсталлятора

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N ‐ i ‐ HP
Inverter air / water heat pump chillers with axial fans
15
7.5.4 Refrigerant diagram of the model N ‐ i ‐ HP ‐ LT 0235 ‐ 0250
C COMPRESSOR
ST COMPRESSOR INLET TEMPERATURE
DT COMPRESSOR OUTLET TEMPERATURE
HP HIGH PRESSURE TRANSDUCER
Pr HIGH PRESSURE FLOW SWITCH
LP LOW PRESSURE TRANSDUCER
LS LIQUID SEPARATOR
4WV CYCLE REVERSING VALVE
LR LIQUID RECEIVER
EEV ELECTRONIC EXPANSION VALVE
FL FILTER
M AXIAL FAN
SE OUTDOOR AIR TEMPERATURE
P CIRCULATOR ON BOARD UNIT
IN WATER INLET TEMPERATURE
OUT WATER OUTLET TEMPERATURE
NRV NO RETURN VALVE
INJ INJECTION VALVE
V ON/OFF VALVE WITH SOLENOID
PV PRESSURE CHECK VALVE
INJT INJECTION TEMPERATURE
INJP INJECTION PRESSURE TRANSDUCER
7.6 ELECTRICAL CONNECTIONS
Check if the power supply circuit meets the unit’s electric nominal data (tension, phases, frequency) reported on the label sticked
on the right ‐ side panel of the unit. The wiring must be done in accordance to the wiring diagram attached to the unit and in
conformity with the national and international norms in force (attempting to provide a general magnetothermic circuit breaker,
differential circuit breakers for each electric line, proper grounding for the plant, etc.). Power cables, electric protections and line
fuses have to be sized according to the specifications listed in the wiring diagram enclosed with the unit and in the electrical data
contained in the table of technical characteristics (see Paragraph 13).
Because of the presence, inside the machine, of EMC filters for compliance with EMC limits (interference emission and
interference immunity), earth fault currents up to 250 mA of intensity can be detected.
For proper installation, electrically connect the unit with a dedicated line; if you use a residual current circuit breaker,
choose a four ‐ pole one, with a trigger threshold of 300 mA and delayed triggering (super ‐ resistant, characteristic K).
The machine must be installed in TN ‐ S/TT power supply earthing systems.
The electrical installation must be carried out in accordance with norms in force.
WARNING: The supply voltage’s fluctuations can not exceed ±5% of the nominal value. Should this tolerance not be
respected, please contact our technical department.
WARNING: The power supply have to respect the listed limits: failing this, warranty will terminate immediately.
Before any operation on the unit, be sure that the power supply is disconnected.
WARNING: The water flow switch (B component in the previous hydraulic circuit and factory installed) have ALWAYS
to be connected following the indications listed in the wiring diagram. Never bridge the water flow switch
connections in the terminal board. Should the water flow switch connections altered or not properly made, the
guarantee will be invalidated.
WARNING: The opening of the separating plate between the 1st and 2nd level of the electrical box is permitted only
to qualified personnel. When lowering the separating plate, be careful not to damage the wiring harness that
connects the inverter boards. Before lowering the separating plate, unplug the communication cables of the inverter
boards (see the wiring drawings "Control Signals 1", section 24.2, 24.6, 24.11, 24.15; these cables are marked in the
drawings with the words: I ‐ , I +, GND, I2 +, I2 ‐ , GND2 ).
WARNING: The remote control panel is connected to the water chiller by means of no.4 wires having a 1,5 mm
2
section. The power supply cables have to be separated from the remote control wires. The maximum distance is 50m.
WARNING: The remote control panel can not be installed in areas with strong vibrations, corrosive gases, and excess
of dirtiness or high humidity levels. Leave free the area near the cooling openings.