Taylor-Wharton EasyCarb - Manual (Page 9)

9
Parts Cleaning
Before installing, be sure to properly clean any replacement parts that are not pack-
aged and marked for oxygen service. Keep all parts clean during installation to
prevent contamination of the carbon dioxide. For more information on cleaning,
consult the compressed Gas Association (CGA) pamphlet G-4.1, “Cleaning for
Oxygen Service” or equivalent industrial cleaning specifications.
Leak Testing
After every repair, pressurize the container to about 280 psig (19.3 bar/1931 kPa) through the
Liquid connection with a regulated source of clean dry carbon dioxide gas. Use only ap-
proved leak test solutions and follow the manufacturer’s recommendations. “Snoop” Liquid
Leak Detector is one approved solution, it is available from: Nupro Co. 4800 E. 345
th St.
Willoughby, Ohio 44094. If leaks are detected, isolate container pressure and relieve pressure
on the lines before repairing, then retest when repairs are completed.
Relief Valves 1
Replace the relief valve when it fails to maintain its setting or when it leaks at pressures below
its setting. If the relief valve functions properly, but operates too frequently, it may be an
indication that the insulation space vacuum has deteriorated. Follow the instructions in the
Evaporation Rate Test Procedure to check the condition of the vacuum. Never try to repair
relief valves.
Inner Container Safety Head
If the inner container safety head (frangible disc) ruptures, determine and correct the
cause of the rupture before replacing the safety head assembly. Then leak test the
plumbing in accordance with the Leak Test instructions.
Supply Line Regulator
The supply line regulator reduces the pressure of the carbon dioxide gas from the
easycarb™ container to the level required by the carbonation system. It provides a
constant supply pressure. To adjust the supply line regulator:
1. Loosen the adjustment screw retaining nut.
2. Adjust the regulator (tee handle) on the Supply Line Pressure Gauge.
3. Tighten the adjustment screw retaining nut.
Pressure Building Regulator
If the regulator fails to close properly, and allows container pressure to rise above the
125 psig (8.6 bar/862 kPa) setpoint, replace the regulator.
After replacement, or if the pressure building circuit is maintaining a pressure mini-
mum other than 125 psig (8.6 bar/862 kPa), the regulator may be adjusted using the
following Field Adjustment Procedure. For more precise adjustment, remove the
regulator and use the Bench Adjustment Procedure.
CAUTION:
If the contents have solidified,
the dry ice in the container
may be thawed by
pressurizing the container to
280 psig (19.3 bar/1931 kPa)
with carbon dioxide gas from
an external source. This may
be accomplished by
connecting a high pressure
cylinder with regulator to the fill
line of the easycarb™
(adapters will be required).
Several days at this pressure
may be required to thaw the
container. For more
information, consult CGA
pamphlet G-6.7, “Safe
Handling of Liquid Carbon
Dioxide Containers that have
Lost Pressure.”
1 See warning on removing contents before releasing container pressure at the beginning of the Mainte-
nance Section.