Check And Connecting - Fujitsu Waterstage WOYA060LFCA Installation And Operating Manual

Air to Water Heat Pump, split system
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.
- 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
(see figure 19).
- 22 -
tightening torques
Nitrogen
"Gas"
connection
Nitrogen
Nitrogen
figure 20 - Refrigerant connections check
Holding wrench
Torque wrench
Designation
Flare nut 6,35 mm (1/4")
Flare nut 9,52 mm (3/8")
Flare nut 12,7 mm (1/2")
Flare nut 15,88 mm (5/8")
Plug (A) 3/8", 1/4"
Plug (A) 1/2"
Plug (A) 5/8"
Plug (B) 3/8", 5/8"
Plug (B) 1/2", 1/4"
Plug (A) and (B) : see figure 21, page 25
figure 19 - Tightening torque
Installation and operation manual "1764 - EN"
"Gas"
connection
"Liquid"
connection
"Gas"
Tightening torque
14 to 18 Nm
33 to 42 Nm
50 to 62 Nm
63 to 77 Nm
20 to 25 Nm
25 to 30 Nm
30 to 35 Nm
10 to 12 Nm
12,5 to 16 Nm