Section Ii: Installation And Maintenance; Description Of The Unit; Structural Features; Electrical Control Board - emmeti EH Serie Manual De Instalacion Y Uso

II SECTION II: INSTALLATION AND
MAINTENANCE
II.1

DESCRIPTION OF THE UNIT

II.1.1

STRUCTURAL FEATURES

o Load-bearing structure and panels in galvanised and RAL 9018
painted sheet metal; galvanised steel sheet metal base.
o -Hermetic scroll type rotary compressors with inverter activation to
control variable capacity from 30% to 120% of the nominal capacity with
peak current reduction during the start-up phase and power factor
correction of the automatic user to the network. They are complete with
external thermal protection and crankcase heater activated
automatically when the unit stops (as long as the electrical supply to the
unit is preserved).
o -Adequately insulated, braze-welded plate water side heat exchange
in stainless steel complete with anti-freeze heater.
o -Air side heat exchanger featuring nned coil with copper pipes and
aluminium ns, with hydrophilic surface treatment.
o -Electric axial fans with external rotor, supplied with internal thermal
protection and complete with protection mesh. Proportional electronic
device for pressure regulation and continuous regulation of the rotation
speed of the fans.
o -Male threaded hydraulic connections.
o -Differential pressure switch that protect the unit from any water flow
interruptions.
o -Outdoor air temperature probe
o -Cooling circuit made with an annealed copper pipe (EN 12735-1-2)
complete with: dryer filter, load connections, high pressure side
pressure switch, pressure transducer on both the high and low pressure
sides, electronic thermostatic expansion valve , cycle inversion valve,
liquid receiver, gas separator and check valve.
o Unit with IP24 protection rating.
o The unit is complete with a charge of R410A refrigerant.
II.2

ELECTRICAL CONTROL BOARD

o Electrical panel can be accessed by opening the front panel, in
compliance with IEC Standards in force, fitted with opening and closing
via specific tool.
o Complete with:
electrical wiring arranged for power supply 400-3ph+N-50Hz;
auxiliary circuit power supply 230V-1ph+N-50Hz derived from main
power supply;
main power supply switch with interlocking safety door isolator;
automatic compressor protection switch;
auxiliary circuit protection fuse;
compressor power contactor;
remote machine commands and controls.
o Programmable microprocessor electronic board handled by the
keyboard inserted in the machine.
o This electronic board performs the following functions:
Adjustment and control of the machine water output temperature
set-points; of the cycle inversion; of the safety timings; of the circulation
pump; of the system pump and compressor hour-run meter; of the
electronic anti-freeze protection with automatic activation if the machine
is off; of the functions that regulate the intervention method of the
individual parts forming the machine;
complete protection of the unit, possible shutdown and display of all
the triggered alarms;
total compressor and inverter protection by means of continuously
monitoring the current absorbed by the compressor and operating
pressures. The compressor can modulate automatically, regardless of
the request if it goes out of its proper field of operation.
RFI filter for conducted electromagnetic interference.
compressor protection phase sequence monitor;
unit protection against low or high phase power supply voltage;
display the programmed set-points via the display; the in/out water
temperature via the display; the alarms via the display; the chiller or
heat pump operation via Led;
self-diagnosis with continuous monitoring of the unit functioning
status.
user interface menu;
alarm code and description;
alarm history management (menu protected by factory password).

SECTION II: INSTALLATION AND MAINTENANCE

o In particular, for every alarm, the following are memorised:
date and time of intervention;
alarm code and description;
in/out water temperature values as soon as the alarm was
triggered;
alarm delay time from the switch-on of the connected device;
compressor status at the time of the alarm;
o Advanced functions:
set-up for serial connection;
possibility of having a digital input for remote management of the
double set-point;
possibility to have an analogue input for the shifting Set-point via a 4-
20mA remote signal;
configured to manage time slots and work parameters with the
possibility of daily/weekly operation planning;
check-up and monitoring of scheduled maintenance status;
computer-assisted unit testing;
self-diagnosis with continuous monitoring of the unit functioning
status.
Compressor drive control serial connection to the programmable
electronic board.
II.3

SPARE PARTS AND ACCESSORIES

IMPORTANT!
Only Use original spare parts and accessories.
EMMETI shall not be held liable for damage caused
by tampering with or work carried out by
unauthorised personnel or malfunctions caused by
the use of non-original spare parts or accessories.
II.3.1

SUPPLIED AS STANDARD

o P0 installation
o Double set-point
o Forced Download Compressors function
o Water filter (supplied with the unit)
o Base resistance
o Guard resistance
o Exchanger protection grid with finned pack
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