Fujitsu Waterstage WOYK150LJL, Installation Manual

Page: 25 / 83

- 25 -
fig. 20 - Tightening torques
Designation Tightening torque
Flared nut 9.52 mm (3/8") 32 to 42 Nm
Flared nut 15.88 mm (5/8") 63 to 77 Nm
Plug (A) 3/8" 20 to 25 Nm
Plug (A) 5/8" 30 to 35 Nm
Plug (B) 3/8", 5/8" 10 to 12 Nm
Plug (A) and (B) : see fig. 22, page 27 .
Holding spanner
Torque wrench
fig. 21 - Checking refrigeration connections
►
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.
-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.
Liaison
liquide
UE
gaz
Azote

MH*
3
UE
Azote

MH*
Liaison
gaz
2
UE
Liaison
gaz
Azote

1
Nitrogen
Nitrogen
Nitrogen
Gas
connection
Gas
connection
Gas
Liquid
connection
OU
OU
OU
HIU
HIU
Waterstage / Installation / 2011 - EN