Post-Discharge Maintenance
October 2014 6-8 06-236115-001
6-3 RECHARGING HFC-227ea CYLINDERS
HFC-227ea charging equipment consists of an HFC-227ea storage container, piping adapter,
control valves, strainer, pressure gauge, flexible hoses, seating adapter, recharge adapter,
pump, scale and interconnecting plumbing. Recharge equipment must be suitable for the
purpose intended and must be compatible with HFC-227ea. A typical HFC-227ea charging
system schematic is shown in Figure 6-8.
Note: During recharge, cylinder pressure gauge is not to be used to determine charging pres-
sure.
Locate the charging equipment in a clean, well-ventilated area near the HFC-227ea sup-
ply and cylinder storage. There should be sufficient room for moving the cylinders to
and from the charging equipment.
6-3.1 Charging Equipment Installation
Before assembling the charging equipment, apply Permacel
®
No. 412D Teflon
®
tape to all pipe
threads.
CAUTION
HFC-227ea cylinders may require retest before recharging. See Paragraph 5-5
for details on cylinder retest. FM Approval is based upon the usage of factory
filled HFC-227ea cylinders.
WARNING
Under no circumstances while performing either cylinder recharge or leak test
should a charged cylinder be allowed to free stand without either the charging
apparatus attached or the safety cap installed. Whenever these devices are not
installed, a charged cylinder must be securely clamped to a rigid structure
capable of sustaining the full thrust that would result should the valve
inadvertently open. The clamping device and supports must be capable of
withstanding a thrust force of 1800 lb (816 kg) for the 2-inch valve or 2800
(1270 kg) for the 3-inch valve. This approximates the thrust force generated
out of the HFC-227ea cylinder valve outlet on a full, wide open discharge.
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