Kidde Fire Protection 400 Series, Design, Installation, Operation, And Maintenance Manual

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Maintenance
06-237518-001 6-9 July 2018
6-9 SERVICE
6-9.1 Cleaning
Remove dirt from metallic parts using a lint-free cloth with dry cleaning solvent. Dry parts
with a clean, dry, lint-free cloth, or air blow dry. Wipe non-metallic parts with a clean,
dry lint-free cloth. Remove corrosion with a light abrasive cloth.
6-9.2 Nozzle Service
Service nozzles after use as follows:
1. Clean the outside of the nozzles with a rag or soft brush.
2. Examine the discharge orifices for damage or blockage. If the nozzles appear to be
obstructed, unscrew the nozzles and clean by immersing them in cleaning solvent. Dry
thoroughly with lint-free cloth. Replace damaged nozzles. Nozzles must be replaced
with the same part number in the same location. See Paragraph 3-17.2.1 for the cor-
rect nozzle placement and orientation.
6-9.3 Repairs
Replace all damaged parts found during inspection. Replacement procedures for Kidde IGS
System cylinders are provided below. For other system components, refer to the installation
drawings and Kidde IGS - 400 Series assembly drawings for guidance.
Kidde IGS cylinders must be recharged or replaced when the cylinder pressure gauge indicates
there is a loss of pressure (adjusted for temperature) of more than 5% or, immediately after
discharge. Initial pressure of the cylinder is 300 bar gauge at 15°C (4351 psig at 60°F) or
200 bar gauge at 15°C (2901 psig at 60°F) depending on cylinder starting pressure.