25
DO1E
DO3E
DO5E
DO4E
ST5E
ST6E
DO2E
DO1EN
DO1EN
DO1E
DO3E
DO5E
DO4E
ST5E
ST6E
DO2E
ST7E
STE
ST7E
ST7E
ID3E
ID3E
ID3E
ID3E
DO2EN
DO3EN
DO4EN
DO5EN
ST5E
ST6E
DO2EN
DO3EN
DO4EN
DO5EN
ST5E
ST6E
ID2E
ID2E
ID2E
ID2E
ST8E
ST8E
ST78E
ST8E
AO2E
AO2E
AO2E
AO2E
AO1E
AO1E
AO1E
AO1E
TERMINAL
TYPE
CONNECTION
ID2E
Digital input
(1)
Ambient thermostat
ID3E
Digital input
(1)
Double setpoint
DO1E(Phase)
DO1E N(Neutral)
Under-voltage output 230V ac,
50Hz, 5A resistive, 1A inductive
Plant auxiliary heating element
(3)
Secondary (relaunching) circulator
DO2E(Phase)
DO2E N(Neutral)
Under-voltage output 230V ac,
50Hz, 5A resistive, 1A inductive
Domestic hot water auxiliary electric heater
(3)
Boiler’s activation
DO3E(Phase)
DO3E N(Neutral)
Under-voltage output 230V ac,
50Hz, 5A resistive, 1A inductive
Alarm warning
(3)
Lockout warning
DO6E(Phase)
DO6EN(Neutral)
Under-voltage output 230V ac,
50Hz, 5A resistive, 1A inductive
Double setpoint valve
(3)
Domestic hot water valve
DO7E(Phase)
DO7E N(Neutral)
Under-voltage output 230V ac,
50Hz, 5A resistive, 1A inductive
Plant season warning
(3)
Defrosting warning
(1) Enablement from maintainer level
(3) Otherwise
7.7.6
CONTROL LOGICS
For the control logics see the control manual supplied with the unit.
7.7.7
Wiring diagrams
To consult the wiring diagrams, refer to the MSE manual supplied with the unit.
8
START UP
Before start-up:
•
Check out the availability of the supplied wiring diagrams and manuals of the installed appliance.
•
Check out the availability of the electrical and hydraulic diagrams of the plant in which the unit is installed.
•
Check that the shut-off valves of the hydraulic circuits are open.
•
Verify that the hydraulic circuit has been charged under pressure and air vented.
•
Check out that all hydraulic connections are properly installed and all indications on unit labels are respected.
•
Check if all power cables are properly connected and all terminals are tightly fixed.
•
Check if the electrical connections are performed according to the norms in force including the grounding connection.
•
Check if the voltage is that shown in the unit labels.
•
Make sure that the voltage is within the limits (±5%) of tolerance range.
•
Check if the electric heaters of the compressors are powered correctly.
•
Make sure that there is no refrigerant leak.
•
Be sure that all the cover panels are installed in their proper positions and locked with fastening screws before start up.
•
If during the first start-up of the machine, the on-board display of the controller does not turn on, it’s necessary to check the
phase sequence of the power supply wires.
WARNING: The unit must be connected to the electrical network and should be in STAND-BY mode (powered) closing
the general switch in order to operate the crankcase heaters of the compressor for a minimum of 12 hours before
start up. (the electric heaters are automatically powered when the main switch is switched off). The crankcase
heaters are working properly if, after some minutes, the temperature of crankcase’s compressor is about 10°C ÷ 15°C
higher than ambient temperature.
WARNING: Never switch off the unit (for a temporary stop) by switching off the main switch: this component should
be used to disconnect the unit from the power supply only for lengthy stoppages (e.g. seasonal stoppages). Besides,
failing the power supply, the crankcase’s heaters are not supplied thus resulting in a possible breakdown of the
compressors once the unit is switched on.
WARNING: Do not modify the internal wiring of the unit otherwise the warranty will terminate immediately.
WARNING: The summer/winter operating mode has to be selected at the beginning of the related season. Frequent
and sudden changes of this seasonal operating mode have to be avoided in order to prevent severe damages to
compressors.
