Check And Connecting - Fujitsu Waterstage WOYG112LCTA Maintenance Document

Air to Water Heat Pump (Split integrated DHW type)
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 flare 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 flare 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 fitted
easily by hand without much force being required.
- Comply with the indicated tightening torques.
- 18 -
Nitrogen
"Gas"
connection
Nitrogen
Nitrogen
figure 19 - Refrigerant connections check
Holding wrench
Torque wrench
Designation
Flare nut 9,52 mm (3/8")
Flare nut 15,88 mm (5/8")
Plug (A) 3/8"
Plug (A) 5/8"
Plug (B) 3/8", 5/8"
Plug (A) and (B) : see figure 21, page 21
figure 18 - Tightening torque
Installation and operating manual "1768 - EN"
"Gas"
connection
"Liquid"
connection
"Gas"
Tightening torque
33 to 42 Nm
63 to 77 Nm
20 to 25 Nm
30 to 35 Nm
10 to 12 Nm