Maintenance
October 2014 5-2 06-236115-001
5-3 PREVENTATIVE MAINTENANCE
Perform preventive maintenance per Table 5-1.
5-4 INSPECTION PROCEDURES
5-4.1 Daily
5-4.1.1 Check HFC-227ea Cylinder Pressure
Check the HFC-227ea cylinder pressure gauges for proper operating pressure. If the pressure
gauge indicates a pressure loss (adjusted for temperature) of more than 10%, or loss in agent
quantity shown on cylinder valve of more than 5%, it shall be refilled. Remove and recharge
the cylinder as instructed in Paragraph 5-7 and Paragraph 6-3.
5-4.1.2 Check Nitrogen Cylinder Pressure
Check the nitrogen cylinder for proper operating pressure. If the pressure loss (adjusted for
temperature) exceeds 10%, recharge with nitrogen to 1800 PSIG at 70°F (124 bar gauge at
21°C).
5-4.2 Monthly
5-4.2.1 General inspection
Make a general inspection survey of all cylinders and equipment for damaged or missing parts.
If the equipment requires replacement, refer to Paragraph 5-6.3.
5-4.2.2 Hazard access
Ensure access to hazard areas, manual pull stations, discharge nozzles, and cylinders are
unobstructed and that nothing obstructs the operation of the equipment or distribution of HFC-
227ea agent.
Table 5-1. Preventive Maintenance Schedule
Schedule Requirement Paragraph
Daily
Check
HFC-227ea cylinder pressures
Check Nitrogen cylinder pressures
5-4.1
Monthly Inspect hazard area system components 5-4.2
Semi-Annually Test pressure switches
Test electric control heads
Check HFC-227ea cylinder weights and pressures
5-4.3
Every 2 Years Blow out distribution piping 5-4.4
Every 5 Years
HFC-227ea and nitrogen cylinder and flexible hose
hydrostatic pressure test and/or inspection
5-5 and 6-4.1
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