CHART TRIFECTA 2K, Service Manual

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Trifecta 2K
✦
NOTE ON START-UP: It should be noted that there are no valves on
the liquid inlet of the T
RIFECTA
system. The only valves on these lines
are check valves to prevent back flow into the bulk tank. If the Laser-
Cyls are at a pressure lower than the bulk tank, liquid will flow from the
bulk tank to the Laser-Cyls until the pressure of the Laser-Cyls are the
same as the bulk tank. As a result, the isolation valve on the bulk tank
should not be opened until all plumbing connections are complete.
P
LUMBING TO
V
APORIZER
The T
RIFECTA
system does not contain an internal or external vaporizer. As a result, a
freestanding, external vaporizer must be connected to the product delivery line of the T
RIFECTA
.
Care must be taken to choose a vaporizer with a working pressure at least as high as the greatest
pressure the system could be subjected to. This line should be plumbed with lines no smaller
than 1 inch. Small lines will introduce undesirable pressure drops in the global gas system.
Referring to F
IGURE
2, Connection C-2 should be plumbed to the vaporizer. The exit of the
vaporizer should be plumbed to the customer house line. When looking at the back of the
system skid, there are four open-ended lines. Two of these lines are the vent to atmosphere lines
for either tank, and the other two are the bulk tank connector and the gas use. These are labeled.
Excluding the two vent lines, the connection point on the right is the one that should be
plumbed to the vaporizer. This is the gas use line.
✦
NOTE ON VAPORIZER INSTALLATION: It is important to make
sure the vaporizer assembly is protected against overpressurization from
trapped liquid. The vaporizer installation must include a relief device on
the down stream side of the vaporizer, preferably set at 550 psig (make
sure your vaporizer is rated for at least this working pressure). The relief
device on the T
RIFECTA
is only a fail-safe device, and should not be
relied upon as the only relief avenue. Operation of the T
RIFECTA
gas use
relief device may vent liquid, creating a noticeable vapor cloud.
7
✦
IMPORTANT: The down stream piping, including the vaporizer,
should be charged with approximately the same pressure as the set
operating pressure of the T
RIFECTA
before the system is turned on. This
will prevent a sudden surge of liquid from entering the system,
vaporizing quickly and lifting the safety relief device.