14
15
2. Secure the cylinder connection to the cylinder in the following manner:
a. Do not force. Tightening the nut onto the cylinder connection should be easy. If it is not, the connection
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 fittings, as it may contaminate pure gases, or create a fire
hazard.
Installing the Outlet Connection:
The autoswitch system has the outlet connection at the top of the box. The connection is a 1⁄4” tube connection. Connect
tubing to the autoswitch that is compatible with the application and is capable of handling the pressure required.
Pressurizing the system for the first 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. Turn the line regulator knob
counterclockwise until the knob stops turning.
3. When first 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.
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 fix any leaks. A leak detection solution may be applied to the connections
(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 (recommended 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. Never attempt to fix a leak under pressure. If leaks are detected,
depressurize the system and retighten the connection. Begin again at step 3.
WARNING:
While CONCOA assembles the autoswitch system components to exacting leak-tight standards,
the customer should also inspect for any loosening of internal parts that may occur in shipping or installation by
completing the pressure decay test detailed above. If all external leaks have been found, corrected, and the system
still indicates a leak, disassemble the front cover from the autoswitch after removing the eight screws shown below.
Check for leaks on the system’s fittings as described above.
6. Slowly turn the line regulator knob clockwise. This will increase the pressure of the line. Adjust to the desired
working pressure and again check for leaks using the methods described above. See Figure 13.
