14.1.1 Before starting-up
• Sight checks
Outdoor unit (see chapter "Installation of the outdoor unit", page 18). OK Not compliant
Location and ttings, condensate evacuation.
Comply with distances from obstacles.
• Hydraulic checks
Hydraulic unit (see chapter "Installation of the hydraulic unit", page 20). OK Not compliant Value
Connection of pipes, valves and pumps (heating circuit, DHW).
Installation water volume (expansion vessel of adequate capacity?).
No leaks.
Main system pressure and degassing.
• Refrigeration connections and checks
(see chapters "Refrigeration connections
and lling the installation with gas", page 21).
OK Not compliant
Check the refrigeration circuits (sealing, no dust or humidity).
Connections between units (pipe length, are tightening torque...).
Installation of HP pressure gauges and vacuum gauges on the gas line (large tube).
Pump down mandatory.
Nitrogen leak test (~ 10 bar).
Opening of refrigeration valves to outdoor unit.
Filling hydraulic unit and pipes with refrigerant.
• Electrical checks
Outdoor unit (see chapter "Electrical connections", page 36). OK Not compliant Value
Main power supply 230v.
Protection by rated circuit breaker.
Cable dimensions.
Earth connection.
Hydraulic unit (see chapter "Electrical connections
on the hydraulic unit side", page 39).
OK Not compliant
Connection to the outdoor unit (L, N, Earth).
Sensors connection (positioning and connections).
Distribution valve connections (boiler and DHW) and circulation pump.
Power supply and protection of electric backup (option).
14 Start-up procedure
Before switching on the hydraulic unit:
• Check the electric wiring.
• Check the refrigeration circuit and make sure that it has been gassed.
• Check the hydraulic circuit's pressure (1 to 2 bar), check that the heat pump has been bled, along with the rest of
the installation.
• Make sure that ALL DIP SW are OFF before starting up.
14.1 Start-up check-list
Installation and Operating Manual "1821- EN"
Alféa Extensa Duo A.I. Heat Pump
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