CONCOA ADI 2062M Instrucciones Para La Instalación Y Operación página 8

2.7 (Open the cylinder valve fully in order to form a good seal at the cylinder
valve packing.) Keep the valve hand wheel or wrench on the open cylinder valve
at all times to allow prompt emergency shutoff.
2.8 Adjust to the desired working pressure by turning the pressure control
knob or handle clockwise, while observing the delivery pressure gauge for the
approximate desired setting.
a. Again check for leaks on the low pressure ports.
b. Check the delivery pressure gauge for any drop in pressure. If a drop
is indicated, check all low pressure ports for leakage.
2.9 Again set the delivery pressure, open the outlet valve if any, and check your
system for leaks and otherwise proper functioning.
a. With gas flowing through your system, some adjustment to delivery
pressure may be required.
b. TWO-STAGE REGULATORS. After the above final setting of delivery
pressure, no further adjustment should be required as the cylinder
depletes.
c. SINGLE-STAGE REGULATORS. After the above final setting of delivery
pressure, you may have to periodically adjust delivery pressure as the
cylinder depletes.
d. As a general rule, a cylinder should be considered EMPTY when the
cylinder pressure drops to a value of two (2) times the delivery pressure
or less. This avoids the possibility of dangerous suck-back conditions.
However, particular system requirements may indicate greater or less
margin than the recommendation. Contact your CONCOA representative
if you have any questions.
SHUTDOWN AND DISASSEMBLY
As indicated in the "Operation" section, a cylinder should be regarded as empty
when the cylinder pressure has dropped to twice the delivery pressure or less.
This will avoid the possibility of dangerous suck-back conditions, where other
system gases are pulled back into the regulator and cylinder.
3.1 BRIEF SHUTDOWN (less than 30 minutes). Simply close the regulator
outlet valve (if supplied). If the regulator does not have an outlet valve use
procedure 3.2.
3.2 EXTENDED SHUTDOWN (beyond 30 minutes).
a. NORMALLY OPEN SYSTEMS or COMPLETE SYSTEM DISASSEMBLY.
This section applies when there is no concern about entry of astmospheric
gases into the system.
1. Close the gas cylinder valve.
2. Shut down any other gas supplies which may be connected to your
system.
3. Turn the adusting knob clockwise and open the outlet valve to drain
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