User's Manual

Post-Discharge Maintenance
P/N 81-CO2MAN-001 7-7 September 2013
7-4.2 Nitrogen Cylinder Recharge
Nitrogen cylinders must be recharged when the cylinder pressure gauge indicates pressure is
below normal (1800 PSIG at 70°F [124 bar gauge at 21°C] or as adjusted for temperature) or
immediately after discharge. Nitrogen used for charging must comply with Federal
Specification BB-N-411C, Grade A, Type 1. Copies of this specification may be obtained from:
Global Engineering Documents, 2625 S. Hickory St., Santa Ana, CA 92707.
Recharge the nitrogen cylinders as follows:
1. Remove the protection cap from the cylinder valve actuation port.
2. Install the nitrogen cylinder recharge adapter (P/N WK-933537-000) to the cylinder valve
actuation port and plug valve outlet port with 1/8" NPT pipe plug.
3. Connect the nitrogen recharging supply hose to the adapter. Tighten securely.
4. Open the nitrogen recharging control valve slowly until full nitrogen flow is obtained.
5. Monitor the recharging supply pressure gauge. Close the charging control valve when the
gauge indicates the proper cylinder pressure (1800 PSIG at 70°F [124 bar gauge at 21°C]).
6. Allow the cylinder to cool to ambient temperature and recheck the nitrogen cylinder
pressure.
7. Open the valve and add additional nitrogen as necessary to obtain a full cylinder charge at
ambient temperature (1800 PSIG at 70°F [124 bar gauge at 21°C]).
8. Close the valve and remove the supply hose and charging adapter from the nitrogen
cylinder.
9. Using a soap solution, thoroughly check the nitrogen cylinder valve for leakage. Bubbles in
the soap solution indicate leakage and shall be cause for rejection of the cylinder.
10. At the completion of the leak test, thoroughly clean and dry the cylinder valve.
11. Ensure the cylinder valve control head port is clean and dry.
12. Immediately install the protective cap to the actuation port of the cylinder valve.
13. Install the charged cylinder as described below.
7-4.3 Nitrogen Cylinder Installation
1. Install the nitrogen cylinder in position in the mounting bracket.
2. Tighten sufficiently to hold cylinder in place while allowing cylinder enough free play to be
manually rotated.
3. Turn the cylinder until the cylinder valve discharge outlet is in the desired position.
4. Securely tighten the mounting bracket clamps and hardware.
5. Remove the pipe plug, reconnect the adapter (P/N WK-699205-010) and flexible actuation
hose or tubing to the cylinder valve outlet port.
6. Remove the protective cap from the cylinder valve actuation port.
WARNING
Before recharging, the cylinder must be firmly secured by chains, clamps or
other devices to an immovable object such as a wall, structural I-beam or
permanently mounted holding rack.
CAUTION
The nitrogen cylinder must be positioned so that the control head, when
installed, is readily accessible and cannot be obstructed during manual
operation.