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Start up
Preliminary checks
Before starting the appliance is very important verify that you have correctly performed all the operations described in
the section "PREPARATION OF STARTING."
Also check that all mechanical and electrical equipment are tightened properly.
WARNING! particular should be paid to the fundamental components (compressor, heat exchangers, fans, electric
motors, pumps...) are detected in the case fixing screws loose, proceed to their tightness before start.
The oil heaters should be placed at least 8 hours before starting. Make sure that the compressor crankcase is warm.
Check that all valves in the refrigerant circuit are open. Check all equipment connected to the unit.
Unit Start up
Start up the unit by pressing the ON/OFF button. About 20 seconds pass from the moment in which the start up request
of the unit is given to the moment in which the (first) compressor starts. Three hundred and sixty seconds will pass from
the last shut down to the next start up of the same compressor.
Check the rotation direction of the fans and rotative compressors. If it is not the right one, invert two supply phases.
Ensure that all the safety and control equipment is functioning correctly. Control the temperature of the water coming out
of the evaporator and regulate the control setting if necessary. Control the oil level.
Warm up
Once the units have been installed, making connections, electrical connections (with the relevant electric panel) carried
out, the following steps must be followed to start up the unit:
1) After making sure that the general switch has been connected (as suggested on the label put on the electric panel),
switch on the unit through the thermostat in the requested mode, switching on the electric panel fan.
2) Check the fan rotation direction and in case reverse the phases on terminals inside the electric panel.
3) Set the thermostat to the required temperature, which has to be lower than the ambient one in summer mode. In this
position, the compressor and the outdoor unit fan motor start running; check the fan and the compressor rotation
direction and if it is necessary all the operations concerning the inversion of the phases have to be repeated. Starting
from this moment, while the air handling unit fan will be continuously running, the outdoor unit will run or will stop
according to the thermostat needs.
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