Unit installation

GB - 11
30RA/30RH
ENGLISH
Start-up, compressor and pump
replacement, unit protection devices
Start-up
Unit start-up is done by the electronic control described above, and
must always be carried out under the supervision of a qualied 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 sufcient water ow and that
the pipe connections correspond to the installation diagram.
- Ensure that there are no water losses. Check the correct opera-
tion of the valves installed.
- All panels should be tted and rmly secured with the correspon-
ding screws.
- Make sure that there is sufcient space for servicing and mainte-
nance purposes.
- Ensure that there are no refrigerant leaks.
- Conrm 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 stan-
dards.
- Make sure that compressors oat freely on the mounting springs.
Compressor replacement
As the compressors are hermetic, when an internal fault occurs, the
compressor must be replaced.
This must be done as detailed below:
- Disconnect the unit from the electrical supply.
- Remove the access panels.
- Remove the gas from the refrigerant circuit using recovery equip-
ment to avoid harming the atmosphere.
- Electrically disconnect the compressor.
- Unbraze or unscrew the suction and discharge lines, taking care
not to damage the rest of the components.
- Remove the compressor fastenings.
- Replace the compressor, ensuring that it contains sufcient oil.
- Braze or screw in the lines.
- Connect the compressor according to the wiring diagram.
- Evacuate the compressor.
- Introduce the quantity of refrigerant indicated on the nameplate
through the service couplings located on the high and low pressu-
re side.
NOTE:
This operation must be carried out by a qualied person.
Pump replacement
If the water pump needs to be replaced, proceed as follows:
- Disconnect the unit from the power supply.
- Remove the access panel.
- Electrically disconnect the pump.
- Empty all water from the hydronic module.
- Loosen the pipe unions a and c.
- Remove the four pump xing screws b.
- Replace the pump.
- Fit the pump xing screws b.
- Tighten the pipe unions a and c.
- Electrically connect the pump
- Connect the unit to the power supply
- Make sure the pump rotates in the right direction using the hole in
the back panel.
- Reinstall the lateral access panel.



 Pipe union

Screw
 Pipe union
Description of unit protection devices
The unit includes the following protection devices:
- Internal compressor protection.
- Fan motor internal thermal protection.
- Main switch.
- Anti-short-cycle protection.
- Thermomagnetic main switch.
- Thermomagnetic control switch.
- Fans and electric heaters thermomagnetic switch.
- Defrost thermostat.
- Fault detector for the temperature and pressure sensors.
- High pressurestat: this protects the unit against excessive con-
densing pressure.
The high pressurestat has factory-xed non-adjustable settings.
The appliance stops due to the intervention of the high pressure
alarm threshold, before the high pressurestat intervenes.
This function is performed by the electronic control device via a
pressure transducer.
- Low pressurestat: This function is performed by the electronic
control device via a pressure transducer.
Only on appliances with hydronic module
- Pump motor external thermal protection.