Atlantic 024124, Installation And Commissioning Instructions

Page: 23 / 88

3.3 Checks and connection
"
The refrigeration circuit is very sensitive
to dust and humidity: check that the area
around the connection is clean and dry
before removing the plugs protecting the
refrigeration connectors.
"
Indicated blowing value: 6 bar for minimum
30 seconds for connection of 20 m.
Checking the gas connection (large diameter).

Connect the gas connection to the outdoor unit.
Blow dry nitrogen into the gas connection and inspect
its end:
-If water or impurities emerge, use a brand new
refrigeration connection.

Otherwise, proceed with flaring and connect the
refrigeration connection to the outdoor unit immediately.
Checking the liquid connection (small diameter).

Connect the liquid connection to the hydraulic unit.
Blow nitrogen into the gas-condenser-liquid connection
system and inspect its end (outdoor unit side).
-If water or impurities emerge, use a brand new
refrigeration connection.
- Otherwise, proceed with flaring and connect the
refrigeration connection to the outdoor unit immediately.
"
Take particular care to position the tube opposite
its connector so as not to risk damaging the
threads. A properly aligned connector can be
attached easily by hand without much force
being required.
-Where necessary, connect an adapter (reducer)
1/4''- 3/8'' or 1/2''- 5/8'' (see figure 19 ).
-Remove the plugs from the pipes and the refrigeration
connections.
-Comply with the indicated tightening torques.
figure 20 - Tightening torques
Designation Tightening torque
Flare 6.35 mm (1/4") 14 to 18 Nm
Flared nut 9.52 mm (3/8") 33 to 42 Nm
Flared nut 12.7 mm (1/2") 50 to 62 Nm
Flared nut 15.88 mm (5/8") 63 to 77 Nm
Plug (A) 3/8", 1/4" 20 to 25 Nm
Plug (A) 1/2" 25 to 30 Nm
Plug (A) 5/8" 30 to 35 Nm
Plug (B) 3/8", 5/8" 10 to 12 Nm
Plug (B) 1/2", 1/4" 12.5 to 16 Nm
Plug (A) and (B) : see figure 22, page 25 .
Holding spanner
Torque wrench
figure 21 - Checking refrigeration connections
Nitrogen
Nitrogen
Nitrogen
Gas
connection
Gas
connection
Gas
Liquid
connection
Installation and Operating Manual "1873- EN" - 23 -
Alféa Extensa Duo A.I. Heat Pump