44 EN/39B/06.2018 © STULZ SpA – all rights reserved
SAL
6.2. Refrigerant connections
In order to create a closed circuit, refrigerant pipes of SplitAir3 internal and external parts must
be connected together. As a consequence, copper pipes for the two liquid and gas lines must be
suitably installed and connected to both parts.
INFORMATION
In this paragraph with distance is meant the length of the liquid line, including the bends, between
the internal and the external units.
DANGER
Work on refrigerant circuits must be carried out only by qualified personnel or by the STULZ
Service personnel.
Making the refrigeration connection includes the following phases (described below):
1. Selecting and laying the pipes;
2. Closing the circuit and testing the seal with the refrigerant connectors of the two parts CLOSED;
3. Opening the refrigerant connectors;
4. Filling with refrigerant (when necessary);
5. Oil charge (when necessary).
INFORMATION
The SplitAir3 unit is supplied pre-charged with the right quantity of refrigerant for 5 m distance
between the evaporating and motor-condensing unit. The pre-filled refrigerant is in the motor-
condensing unit.
SplitAir3 units are pre-filled with refrigerant. After connecting refrigerant circuits of both parts, it
might be necessary to complete refrigerant charge. When the charge is completed, check if traces
of oil are present on the internal or external part, indicating a probable loss of coolant. If so, the
equipment must be thoroughly checked before starting the unit and, if necessary, STULZ technical
department should be contacted.
DANGER
Never run the machine if you have discovered leakage of the coolant fluid.
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