Post-Discharge Maintenance
06-236115-001 6-13 October 2014
6-3.4 HFC-227ea Cylinder Leak Test
1. Warm up the leak detector for 30 minutes before proceeding with Step 2.
2. Calibrate the detector against the H-25IR leak standard by holding the probe about 1/8-
inch (3 mm) away, and noting the meter deflection for the leakage allowance of the stan-
dard. Maximum allowable leak rates are shown in Table 6-9.
3. Remove the safety cap from the discharge outlet. Blow nitrogen on the surface where the
plug was removed.
4. Move the probe back and forth slowly about 1/8 in (3 mm) away from all potential leak
points (such as the discharge outlet area, pilot check, valve bonnet, supervisory pressure
switch connection, safety outlet, liquid level indicator, valve-to-cylinder connections, gauge
and container welds).
5. Meter deflections greater than indicated during calibration are considered excessive and
will be cause for rejection.
6. Replace the safety cap immediately after the test.
7. If excess leakage is detected, salvage the HFC-227ea agent, perform the required mainte-
nance on the container and recharge.
8. After the leak test is complete, reassemble the protection cap to the actuation port of the
valve assembly. Unclamp the cylinder.
WARNING
Clamp HFC-227ea cylinder securely in place. The clamping device and supports
must be capable of withstanding a thrust force of 1800 lb (817 kg). This
approximates the thrust force generated out of the HFC-227ea cylinder valve
outlet on a full, wide open discharge.
CAUTION
HFC-227ea cylinder leak tests must be conducted in a well-ventilated area,
away from the charging station so as not to be influenced by extraneous HFC-
227ea vapors released during the filling operations. Kidde recommends the
Bacharach Model H-25C leak detector for HFC-227ea and the Bacharach H-25IR
leak standard for HFC-227ea for calibrating the leak detector.
Table 6-9. Maximum Permitted Leakage Rates
Part Number
Cylinder Size Cylinder Fill Weight Maximum Allowable Leakage
lb lb ounces/year
90-100010-001 10 6-11 0.11
90-100020-001 20 9-23 0.20
90-100040-001 40 17-40 0.37
90-100070-001 70 30-70 0.67
90-100125-001 125 54-125 1.20
90-100200-001 200 86-200 1.81
90-100201-001* 200 86-200 1.81
90-100200-101 200 86-200 1.81
90-100201-101* 200 86-200 1.81
90-100350-001 350 150-350 3.34
90-100351-001* 350 150-350 3.34
90-100600-001 600 258-600 5.74
90-100601-001* 600 258-600 5.74
90-100900-001 900 390-900 8.68
90-100901-001* 900 390-900 8.68
*Note: Includes liquid level indicator.
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