5-4.3.3 Check Hfc-227Ea Cylinder Weights And Pressures; 5-4.3.3.1 Cylinders Not Equipped With Flexible Tape Liquid Level Indicator; 5-4.3.3.2 Cylinders Equipped With Flexible Tape Liquid Level Indicator - Kidde Fire Systems ECS Manual

Maintenance
5-4.3.3 Check HFC-227ea cylinder weights and pressures
Use the following procedures to check the weights and pressures of all HFC-227ea cylinders.

5-4.3.3.1 Cylinders Not Equipped with Flexible Tape Liquid Level Indicator

Weigh 10 through 900 lb HFC-227ea cylinders as follows:
Install a protection cap on the HFC-227ea cylinder valve actuation port and
safety cap on the cylinder valve outlet port.
WARNING Disconnect all cylinder control heads, discharge hoses, and flexible pilot hoses
to prevent accidental system discharge.
1. Remove the cylinder as instructed in Paragraph 5-7.
2. Place the cylinder on a scale.
3. Record the weight and date on a record card and attach it to the cylinder. The gross weight
and tare (empty) weight are metal stamped on the HFC-227ea cylinder valve label. There-
fore, subtract tare weight from the gross weight to determine net weight of the original
charge. Then, subtract tare weight from the scale reading to determine net weight of the
HFC-227ea agent remaining in the cylinder. If the recorded agent net weight is less than
95% of original charge net weight, replace the cylinder with a fully charged HFC-227ea cyl-
inder (recharging the cylinders is explained in Paragraph 6-3).
4. Reinstall the cylinder (see Paragraph 5-8 for reinstallation instructions).

5-4.3.3.2 Cylinders Equipped with Flexible Tape Liquid Level Indicator

The following procedure explains how to determine the HFC-227ea weight of 125, 200, 350,
600 and 900 lb cylinders equipped with a flexible tape liquid level indicator. This procedure can
be performed without removing the HFC-227ea cylinders from the system.
1. Remove the protective cap to expose the tape.
2. Raise the flexible tape slowly until it latches.
3. Note the reading at the point where the tape emerges from the fitting.
Take care to not pull the flexible tape upwards after it latches to ensure an
accurate reading.
CAUTION
4. To determine the final, more precise reading, repeat the above procedure. About two inch-
es before the tape should latch, raise the tape very slowly until it latches.
5. While supporting the weight of the tape, record the liquid level measurement.
October 2014 5-6 06-236115-001