Fujitsu ABYA45LCT - Indoor PCB Circuit Diagram; Indoor Unit PCB Connections and Components

En-7
Whenthearenutistightenedproperlybyyourhand,(4)
hold the body side coupling with a separate spanner, then
tighten with a torque wrench. (See the table below for the
arenuttighteningtorques.)
CAUTION
Hold the torque wrench at its grip, keeping it in the right •
anglewiththepipe,inordertotightenthearenutcor-
rectly.
Tightenthearenutswithatorquewrenchusingthe•
speciedtighteningmethod.Otherwise,thearenuts
could break after a prolonged period, causing refrigerant
to leak and generate a hazardous gas if the refrigerant
comesintocontactwithaame.
Connection pipe
Torque wrench
Indoor unit pipe
(Body side)
Flare nut
Holding wrench
Tighten with two wrenches.
Flare nut [mm (in.)] Tightening torque [N·m (kgf·cm)]
6.35 (1/4) dia. 16 to 18 (160 to 180)
9.52 (3/8) dia. 32 to 42 (320 to 420)
12.70 (1/2) dia. 49 to 61 (490 to 610)
15.88 (5/8) dia. 63 to 75 (630 to 750)
19.05 (3/4) dia. 90 to 110 (900 to 1,100)
4.3.2 Bending pipes
If pipes are shaped by hand, be careful not to collapse •
them.
Do not bend the pipes in an angle more than 90°.•
When pipes are repeatedly bend or stretched, the material •
willharden,makingitdifculttobendorstretchthemany
more. Do not bend or stretch the pipes more than three
times.
CAUTION
To prevent breaking of the pipe, avoid sharp bends. •
If the pipe is bent repeatedly at the same place, it will •
break.
4.3.3. Pipe connection
CAUTION
Be sure to apply the pipe against the port on the indoor •
unit and the outdoor unit correctly. If the centering is im-
proper,thearenutcannotbetightenedsmoothly.Ifthe
arenutisforcedtoturn,thethreadswillbedamaged.
Donotremovethearenutfromtheindoorunitpipeuntil•
immediately before connecting the connection pipe.
Donotusemineraloilonaredpart.Preventmineral•
oil from getting into the system as this would reduce the
lifetime of the units.
Removethelterguide.(1)
Indoor unit
Filter guide
Detach the caps and plugs from the pipes.(2)
Center the pipe against the port on the indoor unit, and (3)
thenturnthearenutbyhand.
Connection pipe (Liquid)
Indoor unit
Connection pipe (Gas)
For •
2
Top piping and
3
Right piping connections, use the
Auxiliarypipe(Gaspipe)provided.
2 Top piping
Connection pipe (Gas)
Indoor unit (rear)
Connection pipe (Gas)
3 Right piping
Auxiliarypipe(Gaspipe)
1125-9379122009.indd 7 2008/11/26 7:57:05
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