Appion WS260 Operation Manual - Page 8

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Refrigerant Recovery Tips

Accounting for Hose Weight

The weight of recovery hoses should be taken into consideration during recovery and charging. Be

sure to 'tare' the scale only after placing the cylinder on the platform and connecting hoses (to both

tank and system). Also make note of the weight if hoses are removed at any point during the process.

Purging Non-Condensables from Recovery Cylinders

In the event that the Recovery Cylinder pressure is higher than expected, or if the recovery process

seems slower than usual, use an external gauge (not the gauge on the recovery machine) and a

Refrigerant Pressure/Temperature chart to check for the presence of non-condensable gases in the

cylinder.

You can bleed/purge non-condensables into another cylinder following this procedure:

1. The Recovery Cylinder must remain undisturbed for at least 24 hours for the non-condensables to

rise to the top of the cylinder.

2. Through a Manifold Gauge Set, connect the Recovery Cylinder Vapor Port to the Vapor Port of a

second recovery cylinder.

3. Consult a Refrigerant Pressure/Temperature chart, and check the temperature of the Recovery

Cylinder to determine what the pressure should be.

4. While the pressure is higher than the pressure on the chart, slowly open the Vapor Port to bleed off

excess pressure until it is about 5 psi (0.35 Kg/cm

5. Close the valves and let the cylinder stand still for 10 minutes. Repeat if necessary.

80% Fill Weight

Refrigerant recovery cylinders should only be filled to 80% of their maximum volume to allow for

expansion during transportation. Recovery cylinder weight capacity is calculated by the manufacturer

using water and given as Water Capacity. Since refrigerant has a different density than water you

must make a quick calculation to determine the maximum weight of refrigerant you can recover.

Refrigerant

Liquid Density

@ 130ºF (

Water

61.522

R-22

66.312

R-134a

67.46

R-404A

53.18

R-407C

62.28

R-410A

56.11

R-417A

62.383

R-417C

65.243

R-422A

58.343

R-422B

61.85

R-422C

59.174

R-422D

60.642

R-437A

65.231

R-438A

61.804

R-454B

51.343

Fill

Multiplier

Lb/Ft

)

Stamped markings on the recovery tank indicate Tare Weight

1.08

(TW) and Water Capacity (WC). The following equation should

1.10

be used to calculate the maximum weight allowed in a cylinder.

0.86

1.01

0.91

1.01

1.06

0.95

Example (R-22): WC is 47.6Lbs, TW is 24Lbs.

1.01

0.96

47.6 x 1.08 x 0.8 + 24 = 65.1 Lbs Total Tank Weight

0.99

(41.1Lbs of R-22)

1.06

1.00

0.83

) above the pressure listed on the chart.

✪

See Page 4 for additional information

WC x Fill Multiplier x 0.8 + TW

= Max Total Tank Weight

WS260 OPERATION MANUAL