INSTALLATION MANUAL IDRA
9
3.9 PIPE ROUTE
3.10 AIR EXTRACTION IN REFRIGERATION AND EVAPORTATOR PIPES
3.11 ASSEMBLY PROCEDURE
3.12 ADJUSTING THE REFRIGERANT LOAD
WARNING: IT IS NECESSARY TO USE A COUNTER KEY TO TIGHTEN THE VALVES
The radius of curvature of the pipes must be equal or greater
than three and a half times the diameter of the pipe axis.
Do not bend the pipes more than 3 times consecutively and
not make more than 10 curves on the total length of the
The R410A load is only contained in the condensing unit. The
inner unit contains a small quantity of neutral gas.
Therefore, after having made the connections, it is necessary
The IDRA INVERTER condensing unit MUST BE
INSTALLED in an accessible place that allows for safe
technical interventions; if this is not the case, the
Technical Assistance Centre may refuse intervention.
THE IDRA INVERTER CONDENSING UNIT MUST NOT
BE INSTALLED OUTDOORS BECAUSE DURING WINTER
MONTHS ITS HYDRAULIC CIRCUIT MAY BE DAMAGED
ALWAYS PUT AN INSPECTABLE FILTER ON THE WATER
INLET (500 micron mesh).
- Connect the connection pipes to the condensing unit and
the internal unit.
Depending on the connection length of each route, it may
be necessary to top up the R410A load (the condensing
units are pre-filled with a line of 5 metres). This operation
must be carried out by a qualified person who is an expert in
refrigeration. The complete load is introduced via the service
connection. If there is more than a 5m difference between
the evaporator unit and condensing unit, a siphon must
be placed at every 3 m. The siphon must have a radius of
curvature that is as narrow as possible.
to extract the air contained in these connections and in the
inner units.
- Connect the vacuum pump to the fitting (suction), start it
up, and make sure that the indicator pointer goes down to
0.1 Mpa (-760 mm Hg). Before disconnecting the vacuum
pump ensure the vacuum indicator is stable for >15 minutes.
- Close the service valve and disconnect the vacuum pump.
- Remove the caps from the “GAS” and “LIQUID” valves
and open them with a hexagonal key to release the R410a
contained in the IDRA INVERTER, then put the caps back on.
- Check that the connections are sealed properly .To do this
use an electronic leak detector or a spray solution for leak
detection.
valve or via the condensing unit’s Flare (large fitting). If the
refrigerant line is less than 5 m “discharge” the quantity of
excess refrigerant. All operations involving refrigeration
circuits require observing recommendation regarding the
disposal of R410A (according to local laws in force).
3.13 ELECTRICAL CONNECTIONS
A PROPER AND EFFECTIVE EARTHING CONNECTION IS MANDATORY
the manufacturer is not responsible for damages caused by inappropriate or insufficient connections.
Electrical connections must be made respecting the following:
- Use cables which are compliant with the laws in force in the
different countries.
- Follow the order of connection for the phase, neutral and
earthed conductors.
- Install a suitable protection and electric energy sectioning
device with a delayed curve, a contact opening of
- at least three millimetres and an adequate interruption and
differential protection power
- If the unit powering is three-phase, make sure to follow the
exact sequence of the phases.
- The supply voltage of the condensing unit must have a value
between ± 10% of the value indicated on the manufacturing
data plate. If this is not followed, contact the local supplier of
electric power.
- In the case of three-phase power, the imbalance between
the three phases should not exceed 3%.