Instructions For Start-Up; Unit Start-Up; Prolonged Shutdown; Restart After Prolonged Shutdown - RHOSS ELECTA-ECO THAITI 106 Instrucciones De Uso

The following probe connection is used:
Probe RT5 features: NTC 50KΩ at 25°C ±3% -20°C/+150°C.
 Domestic hot water tank resistance
If the domestic hot water tank (not supplied) is fitted with an electrical
resistance, the control logic of said resistance must be configured; refer
to the control panel manual.
NOTE: the resistance is only controlled if the domestic hot water tank
has been enabled.
The following electric connection is used:
NOTE: the electrical supply to the resistances must be separated from
the power supply of the unit. Set up fuse protection.
NOTE: ensure the use of safety thermostats (TS1-TS2).
II.9

INSTRUCTIONS FOR START-UP

IMPORTANT!
Machine commissioning or the first start-up (where
required) must be carried out by skilled personnel
from workshops authorised by RHOSS S.p.A.,
qualified to work on this type of product.
DANGER!
Before starting up, make sure that the installation
and electrical connections comply with the
instructions in the wiring diagram. Also make sure
that there are no unauthorised persons in the
vicinity of the machine during the above operations.
II.9.1

UNIT START-UP

Before starting the unit, perform the following checks.
○ The electrical supply must comply with the specifications on the data
plate and/or the wiring diagram and it must fall within the following
limits:
 variation of the power supply frequency: ±2 Hz;
 variation of the power supply voltage: ±10% of the nominal voltage;
 imbalance between the supply phases: <2%.
○ the electrical supply must feed adequate current to handle the load;
○ open the electrical panel and make sure the terminals of the power
supply and of the contactors are tight (they may have come loose
during transport, which could lead to malfunctions);
○ check that delivery and return pipes of the hydraulic system are
connected in accordance with the arrows next to the machine water
inlet/outlet;
○ do not start the unit if the water tank is empty;
○ check for any refrigerant leaks, especially at the pressure inlets of
pressure gauges, transducers and pressure switches; the
connections could in fact loosen due to vibrations during transport;
○ make sure that the air side heat exchanger is well ventilated and
clean;
○ that active electrical components or wiring are not exposed during
system loading, recovery or purging;
○ that there is continuity in the earth connection.
The start-up test must be executed to check if the unit can run normally
as programmed. If this is not the case, find and resolve the problems
until the test is performed successfully and satisfactorily.
Then follow the procedure below to perform the test correctly.
The unit does not run:
 for safety reasons, before the test, make sure that all the power
supply is disconnected, including the remote power switch.
 make sure the compressor has been run-in for at least 8 hours; for
this purpose, preheat the oil for at least 8 hours so as to prevent it
from being mixed with the refrigerant and thereby damage the
compressor during start-up;
 check that the oil temperature of the compressor is at a higher
temperature than the ambient temperature; if this were not the case,
the casing heater could be damaged and consequently cause the
compressor to break; then repair the resistance before using the unit;
 check that the power supply phase sequence is in the correct order;
 check the earth connections; a faulty installation could cause electric
shock.
Units are energised but not running:
 energise the unit from the master switch;
 check that the power supply voltage value is within a range of ±10% of
the nominal value.
Start-up:
 the unit can be started up after having carried out all the previous
checks by setting the master switch to ON; the unit will start up after a
few minutes;
 check that the main components, such as the compressor, fan, pump,
etc. work correctly;
 check that the voltage and current values are within the preset limits;
 if necessary, actuate the electrical panel and keep it open for the
shortest possible time.
II.9.2

PROLONGED SHUTDOWN

IMPORTANT!
If the unit is not used during the winter period, the
water contained in the system may freeze.
When the machine is out of use for long periods of time, it is necessary
to disconnect it from the mains by opening the master switch. All the
water contained in the circuit must be drained in time. During
installation, consider mixing the water in the circuit with the correct
proportion of ethylene glycol to guarantee protection against freezing
(see Protecting the unit from frost).
II.9.3

RESTART AFTER PROLONGED SHUTDOWN

DANGER!
If the unit is not used for a long time, make sure
that the power supply has been disconnected and
the internal part of the unit and the buffer tank have
been drained.
Before starting up again, make sure that:
 there is no air in the hydraulic system (bleed it if required);
 the water in the heat exchanger is circulating in the required amount;
for this purpose, check that the filter is clean;
 if the unit has not been used for a long time in sub-zero ambient
temperatures, drain the water from the system;
 the air side heat exchanger is well ventilated and clean;
 before actually restarting, preheat the unit by energising it for at least
8h.
40
ELECTA-ECO