16
5.5.3
Mod.
HPE R32
14 / 16
1) Remove the cover by undoing the screws (number 1; 2; 3; 4; 5; 6; 7; 8;9).
2) Undo the screws (number 10; 11) of the front sheet and then push the panel downwards to remove the tabs (Detail A); pull the panel
forward to remove it.
3)
Undo the screw (number 12) and those on the coil side of the unit. To remove the side panel, pull it upwards (to free the tab at the base
indicated as C in detail B) and remove it.
5.6
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 reused 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.
•
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
technical data table in Paragraph 0 (see useful head).
CAUTION: connect the pipes to their fittings always using the key to key method.
CAUTION: The installer is in charge of making sure that the expansion vessel is suited to the real capacity of the
system.
CAUTION: The return pipe from the system must be installed near the label “WATER INLET” otherwise the
evaporator could freeze.
CAUTION: 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 separator 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.
The heating system and the safety valves must comply with the requirements of standard EN 12828.
Tab
DETAIL A
SCALE 1 : 1
DETAIL B
SCALE 1 : 2
