User's Manual

Post-Discharge Maintenance
P/N 81-CO2MAN-001 7-3 September 2013
7-3.1 Carbon Dioxide Agent
Carbon dioxide should be of excellent grade, pure and dry. The agent shall have the following
minimum properties:
a. The vapor phase shall be not less than 99.5 percent carbon dioxide.
b. The water content of the liquid phase shall comply with CGA G6.2. The water
content should be below 0.03 percent (32 ppm) by weight.
c. Oil content shall be not more than 10 ppm by weight.
7-3.2 CO
2
Cylinders
Note: CO
2
cylinders are filled by weight only, not by pressure.
Recharge of Kidde Fire Systems CO
2
cylinders should only be performed by a Kidde Fire
Systems distributor. CO
2
cylinder recharge shall be in accordance with the following
instructions. Where applicable, refer to Figure 7-1 and Figure 7-2 during performance of the
following procedure.
1. Secure CO
2
cylinder to vise or bracket and relieve any remaining cylinder pressure. This
can be accomplished by utilizing the Kidde Fire Systems blow-off fixture, Part No. 
81-930117-000.
2. Remove valve from cylinder (if necessary).
3. Remove valve seat.
4. Remove copper sealing gasket.
5. Remove main check assembly and spring.
6. Remove sleeve retainer, brass sleeve and pilot check assembly.
7. Kidde Fire Systems recommends replacing the safety burst disc. Remove the safety outlet
nut and reattach with a maximum torque of 350 in./lbs.
8. Examine rubber portions of main check, Part No. WK-932636000 (for 1/2-inch valve) and
Part No. WK-800760-000 (for 5/8-inch valve), and the pilot check Part No. 
WK-923066-000 (for both 1/2-inch and 5/8-inch valve) for the following conditions: nicks,
voids, tool marks, bubbles, swelling, chips, grease, dirt, and foreign matter.
9. If any of these conditions exist, the checks should be replaced with new parts before the
cylinder and valve assembly are refilled.
10. Assemble the valve in the following order:
a. Pilot check assembly, Part No. WK-923066-000
b. Brass sleeve, Part No. WK-202805-000
c. Sleeve retainer, Part No. WK-202804-000
d. Spring, Part No. WK-326410-000)
e. Main check assembly, Part No. WK-932636-000 (for 1/2-inch valve) and Part No.
WK-800760-000 (for 5/8-inch valve)
f. Copper gasket, Part No. WK-326420-000
g. Valve seat, Part No. WK-202490-000
11. Install valve into cylinder using Teflon tape on valve threads.
Note: The main check assembly is installed with rubber seat facing up.
Note: The copper sealing gasket MUST
be replaced once the valve seat is removed.
CAUTION
CO
2
cylinders should be filled using an approved transfer pump. DO NOT use dry
ice converters as this may allow water vapor to enter the cylinder, causing
internal corrosion.