Service Sleeves; Electrical Connections - Trane Picco R32-140 User& Installer's Manual

It is advisable to use an external tap to fill the system, which is the responsibility
of the installer.
There is always a service tap in the unit to be used if it is necessary to top up/
discharge the amount of water in the system or adjust the percentage of glycol.
If the unit must be completely drained,first close the manual inlet and outlet shutters (not supplied) and then disconnect the pipes on the water
inlet and outlet so that the liquid in the unit can drain (to make this operation easier, it is advisable to install two external drain cocks between
the unit and the manual shutters on the water inlet and outlet).
When it is required to top up the circuit or to adapt the glycol level, please use the service valve. Unscrew
and remove the cap from the service valve (A) and connect a 14 or 12 mm pipe (inside diameter - check
the valve model installed on your unit), connected to the water mains, to the hose connector and then
drain the circuit by unscrewing the specific ring nut (B). After the end of the operation, retighten the ring
nut (B) and screw the cap back on (A).In any case it is recommended to use an external valve to fill the
system wich can be set up by the installer.
5.8.5 Service sleeves
The unit is fitted with an air venting valve to automatically remove air that has built up in the circuit, pre-
venting undesirable effects such as premature corrosion and wear, lower performance and low exchange
output.
The device also features a safety function because, in the event of exchanger breakdown, it allows the
refrigerant gas to escape outside, preventing it fro being conveyed to the internal terminals.
The valve can be kept in a closed position by closing the plug on the drain; by loosening the plug, the valve
remains in open position and air is discharged automatically.
If you notice a water leak, you must replace the component by unscrewing it with a
spanner, as shown in the image below.
5.9 ELECTRICAL CONNECTIONS
Check that the power supply matches the unit's electric nominal data (voltage, phases, frequency) displayed on the rating plate on the unit's
side panel. The electric power connections must be made in accordance to the wiring diagram enclosed with the unit and in conformity with
national and international standards (providing general circuit breaker, residual current devices for each line, proper earthing of the plant, etc.).
CAUTION: Before starting any operation, make sure that the power supply is disconnected.
CAUTION: Respect the minimum clearances to perform wiring.
CAUTION: The installer is responsible for the disconnection system (e.g. general circuit breaker) upstream of the electrical
connections of the unit.
CAUTION: The supply voltage's fluctuations cannot exceed ±10% of the nominal value. If this tolerance should not be re-
spected, please contact our technical department. The power supply must comply with the limits mentioned, otherwise the
warranty will expire immediately.
CAUTION: If the supply cable is damaged, it must be replaced by qualified personnel, in order to prevent any risk.
Picco R32
Inverter air/water heat pumps with axial fan
A
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