Auxiliary Accessories Connection; External Water Circulator For 30Rb; (Fig. 16); Start-Up - Carrier AquaSnap 30RB Serie Installationanweisungen

IMPORTANT: Make earth connection prior to any other
electrical connections.
Earthing is required by law. The installer must earth the
unit using the terminal marked with the international
earthing symbol.
Before connecting the supply cable to the line, locate line
(L), lines (L1-L2-L3) and neutral N. Then make
connections, as indicated in the wiring diagram.
If the electrical supply cables L1 (R), L2 (S), L3 (T) are
connected in an incorrect sequence, the power supply is
interrupted after a few seconds by the control, which goes
into alarm status preventing the incorrect compressor
rotation.

10 - auxIlIary acceSSorIeS connecTIon

10.1 - external water circulator for 30rB___X9 unit

(fig. 16)

Units without an integrated pump allow driving an
external one.
The signal (24V, 2 A maximum) is supplied at channel
CH22 of the terminal block (see wiring diagram).

10.2 - start-up

Unit start-up is done by the electronic control described
above, and must always be carried out under the
supervision of a qualified air conditioning engineer.
Necessary checks/precautions before start-up
• Ensure that all electrical connections are properly
tightened.
• Ensure that the unit is level and well-supported.
• Check that the hydraulic circuit has sufficient water
low and that the pipe connections correspond to the
installation diagram.
• Ensure that there are no water losses. Check the
correct operation of the valves installed.
• All panels should be fitted and firmly secured with the
corresponding screws.
• Make sure that there is sufficient space for servicing
and maintenance purposes.
• Ensure that there are no refrigerant leaks.
• Confirm that the electrical power source agrees with
the unit • nameplate rating, wiring diagram and other
documentation for the unit.
• Ensure that the power supply corresponds to the
applicable standards.
• Make sure that compressor float freely on the
mounting springs.

10.3 - unit circuit diagram (fig. 17)

Legend fig. 17.
22

11 - MaInTenance

11.1 - refrigerant charge check

Legend - Fig. 17
This check becomes necessary after any refrigerant leak or
1. High pressure transducer
2. High pressure switch (when installed) after replacement of the compressor.
3. Low pressure transducer
The best method to correctly charge refrigerant is to
5. TEV valve
completely empty the refrigerant circuit using refrigerant
7. Suction accumulator
recovery equipment.
8. Water inlet
9. Chilled water outlet
Then charge the exact quantity of refrigerant according to
the data shown on the unit nameplate.
Maintenance
R-410A systems must be charged with liquid refrigerant.
Use the special recharging equipment (normally on the
market) to control the refrigerant correctly.
after replacement of the compressor.
The best method to correctly charge refrigerant is to

11.2 - Cleaning the coil

completely empty the refrigerant circuit using refrigerant
recovery equipment.
Then charge the exact quantity of refrigerant according to
If necessary, proceed as follows for more careful cleaning
of the coil:
Cleaning the coil
Switch the mains supply OFF.
If necessary, proceed as follows for
more careful cleaning of the coil:
Switch the mains supply OFF.
IMPORTANT
The operation must be performed by
IMPORTANT: The operation must be performed by
qualified personnel.
Automatic reset.
Remove unit top cover by loosening the fixing screws and
This is activated when the temperature of the winding or
the the compressor power input exceed the set limits.
lifting the cover. Carefully clean the coil with a vacuum
cleaner from inside to outside. With the same vacuum
cleaner, remove the dust from inside the fan compartment
temperature.
and the fan blades. Avoid any damage to the blades which
This safety device interrupts unit operation and shows
may cause future vibrations and noise.
an alarm code on the display.
This parameter is regulated by the control and
Replace the unit cover and tighten the screws.
factory set to an leaving water temperature of 7°C.
The second set point default value is 12°C and it can be

11.3 - control and safety devices

selected via the Service Interface.
Installed and set according to technical data table
1. Compressor and fan motor winding protection
on the discharge piping with manual reset. On unit
Automatic reset.
compressor overload switch.
This is activated when the temperature of the winding or
the the compressor power input exceed the set limits.
12 30RB
2. Freeze-up protection
This protection device is controlled by the Pro-Dialog
Junior control using the water heat exchanger leaving
temperature.
This safety device interrupts unit operation and shows an
alarm code on the display.
3. Cooling control setpoint
This parameter is regulated by the control and factory set
to an leaving water temperature of 7°C. The second set
point default value is 12°C and it can be selected via the
Service Interface.
Refrigerant R-410A
Gas
Liquid
the data shown on the unit nameplate.
R-410A systems must be charged with liquid
Use the special recharging equipment (norm
lifting the cover. Carefully clean the coil with
cleaner from inside to outside. With the same
cleaner, remove the dust from inside the fan
and the fan blades. Avoid any damage to the
may cause future vibrations and noise.
Replace the unit cover and tighten the screw
Automatic/manual reset (after 6 automati
based on the pressure transducer signal in
compressor suction lines.
Automatic/manual reset (after 6 automati
based on the pressure transducer signal in
compressor discharge lines.
Changes the fan speed according to the
temperature limits, optimising the cond
temperature.
Anti-short-cycle protection.
Fault detector for the temperature and
sensors.