Ariston NIMBUS COMPACT M NET 40 M EXT Technical Instructions For Installation And Maintenance page 58

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 fi gure. Pay attention to the fl ow
directions.
• Connect the pipes to fi ll 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
FINAL INSTALLATION OF THE WHOLE SYSTEM
Attention
The electrical connections are made after completing all hydraulic connections
58 / GB
INTERNAL UNIT
A
C
B
D
G
H
EXTERNAL UNIT