63 / GB
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
INTERNAL UNIT
EXTERNAL UNIT
MODEL LITERS
40MEXT 20
50MEXT 25
70MEXT 35
70M-TEXT 35
90MEXT 45
90M-TEXT 45
110MEXT 55
110M-TEXT 55
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