3.3 Check and connecting
" The refrigerant 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 refrigerant
connectors.
" Indicative blowing value: 6 bar during
30 seconds minimum for connection of 20 m.
"Gas" connection control (large diameter).
Connect the "Gas" connection to the outdoor unit.
Blow dry nitrogen into the "Gas" connection and observe
this end:
- If water or impurities emerge, use a new refrigerant
connection.
Otherwise, perform the are and connect immediately
the refrigerant connection to the hydraulic unit.
"Liquid" connection control (small diameter).
Connect the "Liquid" connection to the outdoor unit.
Blow dry nitrogen into "Gas" connection – condensor
- "Liquid" connection assembly and Observe this end
(Outdoor unit side).
- If water or impurities emerge, use a new refrigerant
connection.
- Otherwise, perform the are and connect immediately
the refrigerant connection to the outdoor unit.
Remarks :
" Take particular care positioning the tube opposite
its connector so as not to risk damaging the
threads. A carefully aligned connector can be tted
easily by hand without much force being required.
- Depending on the case, connect an adapter (reducer)
1/4''- 3/8'' or 1/2''- 5/8''.
- Remove the plugs from the pipes and the refrigeration
connections.
- Warning ! Avoid positioning the Gas pipe in front of
the pump.
- Comply with the indicated tightening torques
(see gure 22).
gure 22 - Tightening torque
Designation Tightening torque
Flare nut 6.35 mm (1/4") 14 to 18 Nm
Flare nut 9.52 mm (3/8") 33 to 42 Nm
Flare nut 12.7 mm (1/2") 50 to 62 Nm
Flare 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 gure 24, page 25.
Holding wrench
Torque wrench
gure 23 - Refrigerant connections check
Nitrogen
Nitrogen
Nitrogen
"Gas"
connection
"Gas"
connection
"Gas"
"Liquid"
connection
Installation and operation manual "1734 - EN"
Heat pump air/water split 1 service alféa extensa +
- 22 -
To Next Page
Loading...
