Daikin LXE10E-A14 Service Manual page 125

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(5) Vacuum-dehydrating, and
refrigerant/refrigerant oil charging
If all the refrigerant has leaked out and air is
intermixed in the refrigeration circuit, remove
the cause of trouble and carry out vacuum-
dehydrating. Then charge the specified
amount of refrigerant.
[Required tools]
1. Refrigerant cylinder (content of 20kg)
equipped with joint for HFC134a
2. Gauge manifold with quick joints
3. Weighing scale (up to 50kg)
4. Vacuum pump
(a) Vacuum dehydrating (Refer page 4.4.5)
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.
Refer to [1] schematlc diagram
Vacuum & Dehydration
1. After recovering, vacuum and
dehydrate from ports r & t.
r
4-22
t
Vacuum Pump