Daikin LXE10E-A Service Manual page 118

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(a) Vacuum dehydrating
After recovering, connect the vacuum
pump to the service ports r and t at the
liquid receiver outlet piping and discharge
pressure regulating valve inlet, and then
vacuum up to 76cmHg. Disconnect the
vacuum pump, holding the refrigerant
circuit in the vacuum state. However, if air
enters in the refrigerant circuit, vacuum
up the circuit to 76cmHg and then
vacuum the circuit for another 2 hours or
more.
r
(b) Cylinder weight recording
Place a refrigerant cylinder on the
weighing scale, and record the weight of
the cylinder.
(c) Charging of liquid refrigerant
1.After vacuum & dehydration, charge the
liquid refrigerant from port t.
(Aprrox. 50% of the specified amount
will be charged.)
t
Vacuum Pump
Figure 1
t
R134a
4-7
2.Replace the manifold gauge hose to
port e and add the liquid refrigerant.
Then if it reached to the specified
amount close the cock of the refrigerent
cylinder.
If it is not reached to the specified
amount due to the pressure valance,
close the cock of the ref. cylinder and
go to next 3 & 4.
3.Operate Automatic Pump Down first.
When the compressor stops (※) during
the operation, end the Auto. P. D.
operation using Unit ON/OFF switch.
(※ The compressor stops twice during
the Auto. P. D. operation. It is possible
to end either at 1st stop or at 2nd stop.)
4.Open the cock of the ref. cylinder and
add the liquid refrigerant from port e.
Then if it reached to the specified
amount close the cock of the ref.
cylinder.
CAUTION
Carry out the operation check after
the replacing and charging of
refrigerant, then replace the drier.
Figure 2
e
R134a