Heat recovery units with refrigeration circuit - URX_CF -
26
Selection and installation manual
GB
The unit is completely wired in the factory
and requires the power supply, intercepted
with inline protections, indicated on the
unit specification plate in order to be
started.
The installer should define the power
supply line based on the length, the type
of cable, the absorption of the unit and the
displacement. TAB.3
All electrical connections must be in
accordance with the present standard at the
moment of installation.
CAUTION:
Refer to the electrical layout supplied
with the equipment for installation needs.
Check that all power cables are correctly
secured to the terminals when switched
on for the first time and after 30 days of
use. Afterwards, check the connection
of the power cables every six months.
Slack terminals could cause the cables
and components to overheat.
The electrical wiring and connections
must be done persons qualified to do so
in accordance with regulations currently
in force.
Every electrical user must be connected to
the system's earthing system.
Use the connectors with the earth
symbol to connect the earthing of the
unit and possible accessories to the
earthing of the building.
Respect the installation power supply
and environment conditions
Keep the panel and wiring away from
electric and magnetic fields that could
disturb, such as inverters, high voltage
power supply lines,etc.
CAUTION!
Once the connections have been
made, check that:
all the cables have been correctly
connected, and that there are no short
circuits between terminals and the
terminals and ground.
the electrical terminals both within
the electrical panel as well as in the
terminal board of the compressor
are secured and that the mobile and
fixed contacts of the remote control
switches do not show signs of wear.
Do not block the air intake of the
panel.
Never connect or disconnect the
remote terminal with energised main
board.
Before start-up
Before start-up check that:
– the system has been charged and the air
has been blown out;
– the electrical connections have been
made correctly;
– the line voltage is within the permitted
allowance (±10% of the rated value);
Unit start-up
For detailed information regarding the
operating parameter settings and all other
machine or control card operations,
consults the user manual.
CAUTION!
Make sure that all the instructions have
been complied with before carrying out the
commissioning checks.
Before the first start-up of the heat recovery
unit check the following points:
• the exact positioning of the panels in
correspondence with the motor ventilating
assembly that require opening by means
of a screw-driver;
• the fixing of the unit to the wall;
• the earthing of the unit to the buildings
earth system;
• the connection to the ducts;
• the condensate drain connection to the
trap;
• the insulation of the tubes to the coils ;
• the ground wires of the electrical
components;
• the absence of air in the water coils.
In particular check that:
• the electrical connection has been
performed correctly and that all terminals
have been sufficiently tightened;
• the voltage on the terminals is 230 V ±
5% (for units with single-phase power)
or 400 V ± 5% (for units with three-phase
power): If the voltage is subject to frequent
change, contact our Technical department
in order to select the necessary protection;
• there are no leaks of refrigerant
through the use of a leak detector.
CAUTION!
Before start-up, check that all the
panels of the unit are in place and
secured with the screws.
WARNING!
If, at the time of the first start, the
compressor don’ t start, the cause can
be attributed to a wrong wiring of the
sequence of the phases L1-L2-L3 or to
the interruption of one of them, resul-
ting in the intervention of the relay of
the phase sequence.
Electrical connections
TAB.3
Operating voltage ± 10% of the rated voltage (EN60204)
Frequency
± 1% of the continuous frequency
± 2% for short periods
Operating room umidity from 30% to 95%, without condensate
or the formation of ice (EN60204)
Altitude up to 1000 m a.s.l. (EN60204)
Operating room temperature from +5°C to 40°C
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