User's Manual

Post-Discharge Maintenance
September 2013 7-2 P/N 81-CO2MAN-001
3. Reset all control heads on cylinders; and stop (directional) valves on multi-hazard systems.
Replace any control head that fails to reset properly. Reinstall locking pins. Replace seal
wires.
4. If pneumatic transmitter is installed, reset as follows:
a. Unscrew the slotted indicator cap.
b. Reverse cap and screw onto plunger.
c. Pull plunger out until it clicks into position.
d. Unscrew cap and reinstall over plunger. Green indicator showing through slots in
cap indicates transmitter is in "SET" position.
5. If system was operated using a nitrogen pilot cylinder, remove the control head from the
nitrogen cylinder. This will vent nitrogen pressure from the actuation piping and reset the
pressure operated control heads on the carbon dioxide cylinders.
6. If system was operated using a manual pull station, reset manual pull station.
7. If time delay was manually overridden, reset manual control lever on pneumatic Discharge
delay. Reinstall locking pin. Replace seal wire.
8. Replace all discharged odorizer assemblies.
7-3 CYLINDER RECHARGE
WARNING
Control head(s) must be in the “set” or “closed” position before attaching to the
cylinder valve, to prevent accidental discharge of the carbon dioxide system.
CAUTION
Before resetting a control head fitted to a nitrogen cylinder, all pressure must
be relieved from the downstream actuation piping. Failure to follow this
procedure can cause the control head to not be operationally ready after reset.
CAUTION
Pneumatic control head, attached to the pneumatic transmitter, must be reset
before resetting the transmitter.
CAUTION
CO
2
and nitrogen cylinders must not be recharged without a retest if more than
five (5) years have elapsed from the date of last test. Retest shall be in
accordance with the requirements of CFR 49. After retest, interior of cylinders
must be thoroughly dried and free of residue.
WARNING
Under no circumstances while performing either cylinder recharge or leak test
should a CO
2
cylinder have a discharge head or control head attached to the
cylinder valve. When handling carbon dioxide cylinders, observe the following:
a. Each cylinder is factory equipped with a valve protection cap threaded
securely over the valve assembly. This device is a safety feature and
provides protection during handling.
b. This protection cap must be installed at all times, except when the cylinder
is connected into the system piping, being filled, or leak tested.
c. The valve protection cap must be stored in a secure space and made readily
available for use. Do not move or handle cylinders without the cap
installed.