Panasonic OCU-CR1000VF8A, Руководство по обслуживанию

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Refrigerant Charging Procedure
2. CO
2
refrigerant grade
Charge CO
2
refrigerant (R744) that is compatible with the following specifications.
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3. Refrigerant Charging
1) With the refrigeration unit being stopped, open the joint valve and gradually charge the
refrigeration unit with refrigerant in the liquid state.
When it is difficult to adjust the charging speed by using the joint valve or the charging valve
of manifold gauge set, install a capillary tube between the CO
2
refrigerant cylinder and
manifold gauge set.
Note: Do not install a capillary tube between the service piping and manifold gauge set.
2) When the liquid refrigerant no longer goes into the refrigeration unit, close the access port of
the high pressure service valve (the front seated position) and make the refrigeration unit in
cooling operation condition to adjust refrigerant quantity using the access port of the low
pressure service valve (the back seated position).
Note: In order to avoid overcharging, maintain the charging rate at approx. 20 g in 5 seconds.
3) After completing charging operation, close the refrigerant cylinder valve and check that the
access ports of the low pressure and high pressure service valves have been closed.
4) Gradually open the purge valve of the manifold gauge set, and release the refrigerant
remaining in the service piping, manifold gauge set, and charge hose (or 1/4" pipe).
When detaching the service piping, refer to
“Service Pipe Connection/Disconnection
Method”.
Item Specifications
Purity > 99.9% (volume)
Moisture < 0.005% (volume)
Total sulfur < 0.03ppm (weight)
Inert gas (H
2
, N
2
, O
2
, Ar) < 0.01% (volume)