Ariston NIMBUS PLUS S NET Manual page 59

INTERNAL UNIT
Preinstallation
The indoor unit should be positioned in a compartment at home,
in order to ensure the best performance. Use the template provi-
ded and a spirit level for positioning the system.
Minimum clearance
In order to allow the proper maintenance of the appliance, you
must observe the minimum clearances for installation as shown in
the figures below. To position the unit properly, use the template
provided and a spirit level.
150
1. Fitting the tray and removing the front panel
Remove the screws (fig.1), pull the front in the direction of the
arrow and then inclinate and push up
(Fig. 1)
Fix the metal bracket. This bracket is necessary for hanging the
module to the wall. The module must be positioned with the
auxiliary of a spirit level.
150 500
2. Safety valve drain
safety valve
3 bar
air purge valve
Assemble the drain pipe of the safety valve, included in the pac-
kage documents.
3. Flling system
The maximum heating/cooling system pressure is 3 bar. The
maximum filling pressure is 1,2 bar.
As soon as the system is filled, disconnect it from the water mains.
Do not refill the system frequently (multiple times a month) as this
can result in corrosion.
Expansion vessel
The system is equipped with an expansion vessel for heating systems
(8 l). Make sure that the expansion vessel has a capacity appropriate
to the quantity of water present in the installation. Prior to filling,
make sure that the filling pressure is equal to 1 bar.
4. Preparing for startup of the heating/cooling system
Open the heating/cooling system delivery/return cocks.
Open the heating circuit filling cocks.
Close the cocks as soon as the pressure gauge indicates the desired
pressure.
Bleed the system, restore the pressure and check that all gaskets are
tight.
NOTE: In cooling mode, in order to avoid condensate leakage, the
installation of a drain pan under the module (see figure) and the
insulation of connecting pipes are recommended.
59 / GB