Concoa 526 **1 Series Руководство по установке и эксплуатации - Страница 10
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2. Secure the cylinder connection to the cylinder in the following manner:
a. Do not force. Tight en ing the nut onto the cylinder connection should be easy. If it is not, the
con nec tion may be wrong for the type of gas being used.
b. Left-hand threads are used on some cylinder connections. A notch in the middle of the hex nut
typically indicates a left-hand thread.
c. Gaskets are used on some inlet connections. Be sure the gasket is in good shape. Do not
over-tighten to avoid squashing the gasket into the gas line. Keep extra gaskets on hand.
d. Never use oil or grease on regulator or cylinder fi ttings, as it may contaminate pure gases, or
create a fi re hazard.
Installing the outlet connection:
The standard system has the outlet connection at the top of the switchover system. The connection is a
male ¼ NPT. For the system with the line regulator, connections will be made at the female ¼ NPT on the
line regulator shown in the diagram.
Pressurizing the system for the fi rst time (non-manifold use):
Before system startup, it is recommended that all systems be pressure tested, leak tested, and purged
with an inert gas such as nitrogen. To accomplish this with connections other than a CGA 580, it will be
necessary to use an adapter. The recommended use of an adapter is for temporary use only, for system
start up and checks. Adapters should never be used on a permanent basis.
1. Wear safety glasses and gloves.
2. Be sure that both ends of all hoses or pigtails are secured before pressurizing. On the system with
the line regulator, turn the line regulator knob counterclockwise until the knob stops turning.
3. When fi rst pressurizing, do not stand in front of or contact the switchover system. Slowly open the
cylinder valve. Observe the high pressure gauge for a rise in pressure up to full cylinder pressure.
Warning - if this system is equipped without the line regulator, the outlet will pressurize when the
cylinder valve is opened.
4. Keep the hand wheel or wrench on the open cylinder valve at all times, to allow prompt emergency
shut-off.
5. Inspect all connections for leaks and fi x any leaks. A leak detection solution may be applied to the
con nec tions (if compatible with the application) which indicates leaks by bubbling. To further check
for leaks, or if the leak detection solution can not be used, close the cylinder valve for a period of
time (rec om mend ed 24 hours), and observe the high pressure gauge for a drop in pressure. If so
indicated, recheck the CGA connection and all other high-pressure port connections. If equipped
without the line regulator, the outlet connections will also need to be rechecked.
6. Never attempt to fi x a leak under pressure. If leaks are detected, depressurize the system and
retighten the connection. Begin again at step 3.
7. If equipped with the optional line regulator, slowly turn the line regulator knob clockwise. This will
in crease the pressure of the line. Adjust to the desired working pressure and again check for leaks
using the methods described above.
OPERATION
The arrow on the priority valve always points to the primary side; the bank opposite the primary side is
con sid ered the reserve side. Starting with the arrow pointing to the right side, gas will fl ow from the right side
cyl in der. As the gas in the primary side is depleted, the gas pressure will drop on the gauge of the primary
reg u la tor. When the pressure drops to the pressure setting of the reserve side regulator, fl ow will begin
from the reserve cylinder; the inlet pressure on the primary side will stabilize. This is called a changeover.
At this point, the gas pressure on the reserve side (preset regulator) will drop. This indicates that its time
to change the cylinders on the primary side. Before re mov ing the nearly depleted primary cylinder, the
priority valve should be rotated 180°. This makes the reserve cylinder the primary source. Remove the
depleted cylinder and replace with a full cylinder. Before removing the cylinder be sure to close the cylinder
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