30
1. Preparation
* Refrigerant [MU-N48]
* Connector for charging pipe (if necessary)
2. Procedures
1) Pull vacuum in refrigeration circuit
Pull vacuum by pump for approx. 5 minuites.
<NOTE>
It is important to pull vacuum in the circuit
to avoid possibility causing fire by residual
refrigerant (R-600).
2) Connect charging pipe.
Measure weight of tank before charge. (See picture c.)
Connect tank with both vacuum pump and gauge
manifold. (See picture d.)
It should be taken 3 hours at least to pull vacuum
with 2 tanks.
Pump capacity: 300L/min.
Collection and charge of refrigerant
a.
b.
c.
d.
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