Ariston NIMBUS PLUS M NET Manual page 68

HYDRAULIC CONNECTIONS ON INDOOR MODULE
Before carrying out the water circuit connections, check that:
• the system has been cleaned
• there are no impurities in the circuit water
• compatible components are used (do not connect copper and steel to each other)
• the system has been hooked up via the water circuit
• the water is never harder than 20°F (11,2 °dH) or softer than 12°F (6,7 °dH), and that its pH is 6.6 to 8.5. If this is not the
case, install water treatment to prevent incrustations and corrosion in system.
• the water circuit pressure never exceeds 5 bar, otherwise install a pressure reducer at the system's intake
• a disconnector with cock is installed between the system and the domestic water circuit (if present)
• the supplied expansion vessel is large enough to handle the water in the system
After the check:
• Connect the heating system to the internal unit where indicated from the points A and B in the next figure. Pay attention to
the flow directions.
• Connect the pipes to fill the installation.
• Connect the safety valve and the discharge valve of the internal unit with the provided silicone pipe.
CONNECTION BETWEEN INTERNAL UNIT AND EXTERNAL UNIT
A B
MODEL
40 M EXT
50 M EXT
70 M EXT
70 M-T EXT
90 M EXT
90 M-T EXT
110 M EXT
110 M-T EXT
68 / GB
INTERNAL UNIT
C D E F
LITERS
20
25
35
35
45
45
55
55
EXTERNAL UNIT