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Chapter 5 — System Maintenance Page 5 -1 REV. 2 CHAPTER V SYSTEM MAINTENANCE GENERAL 6. Refill the cylinder with agent. Use the table below for easy reference. This chapter will detail the basic information necessary for proper maintenance of the PYRO -CHEM Industrial Fire Cylinder Recharge Suppression System. However, before attempting any sys ► PCI 15ABC 12.5 Ib. ABC (Part No. 550170) tem maintenance, it is necessary to attend a Factory Certification Training Class and become Certified to install PCI- 25sABC 25 Ib. ABC (Part No. 550170) and maintain the PYRO -CHEM Industrial Open Face Paint PCI -35ABC 35 Ib. ABC (Part No. 550170) Spray Booth Fire Suppression System. PCI- 50sABC 50 Ib. ABC (Part No. 550170) PCI -70ABC 70 Ib. ABC (Part No. 550170) MAINTENANCE AFTER SYSTEM DISCHARGE The Model RC -50ABC (Part No. 550170) is a 50 -Ib. pail of ABC dry chemical recharge agent available from ► PYRO -CHEM. 1. System Cleanup. 7. Insert the siphon tube into the cylinder, and screw the The hazard area cleanup after a system discharge is very valve onto the cylinder. Make sure that the valve is basic. The dry chemical agent should be cleaned up by screwed completely into the cylinder. either sweeping or vacuuming. Residual dry chemical • 8. Attach the Recharge Adaptor (PYRO -CHEM Part No. should be wiped off effected surfaces with a damp cloth. 550130) to the discharge port of the valve. The adaptor 0-ring should be completely inside the discharge port. 2. System Cylinder Recharge. Attach a source of dry nitrogen to the adaptor. CAUTION Charge the cylinder with dry nitrogen to 350 psi at 70 °F. Protective eye goggles and protective footwear must NOTE be worn when performing system maintenance. 1. The pressure gauge attached to the cylinder valve should not be used to determine when the charg- 1. Remove the cylinder from the control head or pneumatic ing pressure has been reached. A pressure regu- adaptors and inspect for visual damage. If there is any lator should be used damage the cylinder must be hydrostatically tested before being refilled. If there is no damage, the cylinder 2. Higher pressure may be needed during the initial can be recharged. charging stage to blow the agent out of the siphon tube. Secure the cylinder during this stage, as it 2. Reset all pneumatic actuators (Models PDA -D2) by may jump as the agent is blown from the siphon depressing the check valve on top and relieving the tube. pressure. Remove the pneumatic actuator or control head from the valve and use any 1/4 -20 UN screw or 9. Slowly disconnect the nitrogen source from the bolt to screw into the top of the piston. Pull up on the Recharge Adaptor. The cylinder valve will close when piston until the piston is flush with the top of the valve the Recharge Adaptor is depressurized. When the body and remove the screw or bolt from the piston. valve is closed and the nitrogen source is disconnect - 3. Remove the valve and siphon tube assembly from the ed from the Recharge Adaptor, remove the recharge cylinder and unscrew the siphon tube from the valve. adaptor from the valve discharge port. Immediately screw the recoil preventer into the discharge port. 4. Inspect the valve to make sure no mechanical damage has occurred. If there is evidence of any damage to the seals, rebuild the valve using the Dry Valve Rebuilding CAUTION Kit (PYRO -CHEM Part Number 550037). The recoil preventer must remain in the valve discharge 5. Screw the siphon tube back into the valve. port until the cylinder is attached to the piping network. 10. Reinstall the cylinder to the piping network. Reattach the control head or pneumatic adaptor. ULEX 3437 CEx732 March 17, 2004