Access To The Inside Of The Unit On The Hydronic Kit Side; Plumbing Connections - Trane Picco R32-140 User& Installer's Manual

5.7.2 Access to the inside of the unit on the hydronic kit side
In the event of maintenance and/or inspection of the hydronic part and part of the refrigeration circuit, it is necessary to access the inside of the
unit from the rear side, near the hydraulic connections. Unscrew the rear panel fixing screws and remove it from the base.
In the case of a single-battery unit, one of the two sides can also be inspected by removing the side panels; in the case of a tank kit, both sides of
the additional appendage can also be removed.
5.8 PLUMBING CONNECTIONS
The plumbing connections must be made in accordance with national and/or local regulations; pipes can be made of steel, galvanised steel or
PVC. Pipes must be accurately sized according to the nominal water flow rate of the unit and the pressure drops of the water circuit. All pipes
must be insulated with closed-cell material of adequate thickness. The chiller must be connected to the pipes using new flexible joints, not re-
used ones. The water circuit should include the following components:
• Well thermometers to monitor the circuit's temperature.
• Manual gate valves to isolate the chiller from the water circuit.
• Metal Y filter and dirt separator (installed on the return pipe) with metal mesh no larger than 1 mm. (obligatory to mantain the validity of
the guarantee).
• Loading group and exhaust valve where necessary.
CAUTION: When sizing the pipes, make sure not to exceed the maximum pressure drop on plant side reported in the techni-
cal data table (see useful head).
CAUTION: Connect the pipes to their fittings always using the key to key method.
CAUTION: Create a suitable drain for safety valve.
CAUTION: The expansion vessel, if present on the unit (check the hydraulic diagram), has a limited capacity. it is the in-
staller's responsibility to check that the expansion vessel is adequate for the actual capacity of the system, otherwise an
additional expansion vessel must be provided.
ATTENZIONE: The return pipe from the system must be installed near the label "WATER INLET" otherwise the evaporator
could freeze.
ATTENZIONE: It is mandatory to install a metal filter (with mesh no larger than 1 mm) and a dirt separator on the return pipe
from the system labelled "WATER INLET". If the flow switch is manipulated or altered, or if the metal filter and dirt separa-
tor are missing, the warranty will terminate immediately. The filter and dirt separator must be kept clean. Therefore after
installing the unit, you must make sure that they are still clean and check them regularly.
All of the units leave the company supplied with flow switch (installed in factory). If the flow switch is altered or removed
or if the water filter and dirt separator are missing from the unit, the guarantee will be void. Refer to the wiring diagram
attached to the unit to connect the flow switch. Never jumper connections of the flow switch in the terminal block.
Picco R32
Inverter air/water heat pumps with axial fan
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