6-2 MAINTENANCE PROCEDURES

A regular program of systematic maintenance is essential for continuous, proper operation of all Kidde Engineered Systems. A periodic maintenance schedule must be followed and an inspection log maintained for ready reference. As a minimum, the log must record:

1. Inspection interval,

2. The inspection procedure performed,

3. Maintenance performed, if any, as a result of inspection, and 4. The name of inspector performing the task.

If the inspection indicates areas of rust or corrosion, immediately clean and repaint the area. Perform cylinder hydrostatic pressure testing in accordance with Paragraph 6-2.5 of this manual. Perform scheduled maintenance per Table 6-1.

WARNING

Kidde Engineered System and nitrogen cylinder valve assemblies must be handled, installed, inspected and serviced only by qualified and trained personnel in accordance with the instructions contained in this manual and Compressed Gas Association (CGA) pamphlets C-1, C-6 and P-1. CGA pamphlets my be obtained from Compressed Gas Association, Crystal Square Two, 1725 Jefferson Davis Highway, Arlington, VA 22202-4102.

Before performing these maintenance procedures, refer to the Material Safety Data Sheets and Safety Bulletins in the appendices of this manual.

Table 6-1. Maintenance Schedule

Schedule Requirement Paragraph

Daily Check Kidde Engineered System cylinder pressures

Check nitrogen cylinder pressures Paragraph 6-2.1

Monthly Inspect hazard area system components

Check Kidde Engineered System cylinder weights and pressures

Paragraph 6-2.2

Semi-Annually Test pressure switches Test electric control heads

Paragraph 6-2.3

Every 2 Years Blow out distribution piping Paragraph 6-2.4

Every 5 Years Kidde Engineered System and nitrogen cylinder hydrostatic pressure test and inspection

Flexible hose hydrostatic pressure test and inspection

Paragraph 6-2.5

6-2.1 Daily

6-2.1.1 CHECK KIDDE ENGINEERED SYSTEM CYLINDER PRESSURE

Check the Kidde Engineered System cylinder pressure gauges for proper operating pressure (refer to Table 2-2). If the pressure gauge indicates a pressure loss (adjusted for temperature) of more than 10%, or loss in agent quantity shown on cylinder valve of more than 5%, it shall be refilled. Remove and recharge the cylinder as instructed in Paragraph 7-3.

6-2.1.2 CHECK NITROGEN DRIVER CYLINDER PRESSURE

Check the nitrogen driver cylinder pressure gauge for proper operating pressure (see Table 2-4). If the pressure gauge indicates a pressure loss (adjusted for temperature) of more than 10%, it shall be refilled. Remove and recharge the cylinder with nitrogen to 1800 PSIG @ 70°F (124 bar gauge @ 21°C).

6-2.2 Monthly

6-2.2.1 GENERAL INSPECTION

Make a general inspection survey of all cylinders and equipment for damaged or missing parts. If the equipment requires replacement, refer to Paragraph 6-2.6.3.

6-2.2.2 HAZARD ACCESS

Ensure access to hazard areas, manual pull stations, discharge nozzles, and cylinders are unobstructed and that nothing obstructs the operation of the equipment or distribution of Novec 1230 fluid.

6-2.2.3 INSPECT HOSES

Inspect 1/4-inch flexible actuation hoses for loose fittings, damaged threads, cracks, distortion, cuts, dirt and frayed wire braid. Tighten loose fittings and replace hoses with stripped threads or other damage. If necessary, clean parts as directed in Paragraph 6-2.7.1. Inspect the adapters, couplings and tees at the Kidde Engineered System cylinder pilot outlets and tighten couplings if necessary. Replace any damaged parts.

6-2.2.4 INSPECT PRESSURE CONTROL HEADS

Inspect the Kidde Engineered System cylinder pressure operated control heads for physical damage, deterioration, corrosion, distortion, cracks, dirt and loose couplings. Tighten loose couplings. Replace damaged caps. Replace the control head if damaged. If necessary, clean as directed in Paragraph 6-2.6.1.

6-2.2.5 INSPECT ELECTRIC CONTROL HEADS

Inspect the Kidde Engineered System cylinder electric control heads for damage, corrosion, and dirt. Check the control heads' flexible electrical line for wear and damage. Check the control head for loose coupling and tighten if necessary. Check that the indicator is in the SET position, the pull pin is installed in the manual lever, and the seal wire is intact. Replace the control head if damaged. If necessary, clean as directed in Paragraph 6-2.6.1.

6-2.2.6.1 Inspect Brackets, Straps, Cradles and Mounting Hardware

Inspect the Kidde Engineered System cylinder brackets, straps, cradles and mounting hardware for loose, damaged or broken parts. Check the cylinder brackets, straps and associated parts for corrosion, oil, grease and grime. Tighten any loose hardware. Replace damaged parts. If necessary, clean as directed in Paragraph 6-2.6.1.

6-2.2.6.2 Inspect Discharge Hoses

Inspect the flexible discharge hoses for loose fittings, damaged threads, cracks, rust, kinks, distortion, dirt and frayed wire braid. Tighten loose fittings and replace hoses with stripped threads. If necessary, clean as directed in Paragraph 6-2.6.1.

6-2.2.6.3 Inspect Actuation Line

Inspect the nitrogen actuation line (if used) and support brackets for continuity, physical damage, loose fittings, distortion, cracks or cuts. Tighten loose fittings. Replace damaged parts. If necessary, clean as directed in Paragraph 6-2.6.1.

6-2.2.6.4 Inspect Discharge Nozzles

Inspect discharge nozzles for dirt and physical damage. Replace damaged nozzles. If nozzles are dirty or clogged, refer to Paragraph 6-2.6.1.

6-2.2.6.5 Inspect Pull Stations

Inspect all manual pull stations for cracks, broken or cracked glass plate, dirt or distortion. Inspect the station for signs of physical damage. Replace damaged glass. Replace the station if damaged. If necessary, clean as directed in Paragraph 6-2.6.1.

6-2.2.6.6 Inspect Pressure Switches

Inspect pressure switches for deformations, cracks, dirt or other damage. Replace the switch if damaged. If necessary, clean the switch as directed in Paragraph 6-2.6.1.

CAUTION

Nozzles must never be painted.

Nozzles must be replaced by nozzles of the same part number. (A part number is located on each nozzle.) Nozzles must never be interchanged since random interchanging of nozzles could adversely affect proper Novec 1230 fluid distribution and concentration within a hazard area.

6-2.2.6.7 Weighing Kidde Engineered System Cylinders

Weigh 10 through 900 lb. Kidde Engineered System cylinders as follows:

Note: Ensure all warnings are followed prior to proceeding with Step 1. 1. Remove the cylinder as instructed in Paragraph 6-2.7.

2. Place the cylinder on a scale.

3. Record the weight and date on a record card and attach it to the cylinder. The gross weight and tare (empty) weight are metal stamped on the Kidde Engineered System cylinder valve label. Therefore, subtract tare weight from the gross weight to determine net weight of the original charge. Then, subtract tare weight from the scale reading to determine net weight of the Novec 1230 fluid remaining in the cylinder. If the recorded agent net weight is less than 95% of original charge net weight, replace the cylinder with a fully charged Kidde Engineered System cylinder (recharging the cylinders is explained in Paragraph 7-3).

4. Reinstall the cylinder (see Paragraph 6-2.8 for reinstallation instructions). 6-2.2.6.8 Cylinders Equipped with a Flexible Tape Liquid Level Indicator

The following procedure explains how to determine the Kidde Engineered System weight of 125, 200, 350, 600 and 900 lb. cylinders equipped with a flexible tape liquid level indicator. This procedure can be performed without removing the Kidde Engineered System cylinders from the system.

1. Remove the protective cap to expose the tape. 2. Raise the flexible tape slowly until it latches.

3. Note the reading at the point where the tape emerges from the fitting.

4. To determine the final, more precise reading, repeat the above procedure. About two inches before the tape should latch, raise the tape very slowly until it latches.

5. While supporting the weight of the tape, record the liquid level measurement.

WARNING

Disconnect all cylinder control heads, discharge hoses, and flexible pilot hoses to prevent accidental system discharge. Install a protection cap on the Kidde Engineered System cylinder valve actuation port and safety cap on the cylinder valve outlet port.

CAUTION

Take care to not pull the flexible tape upwards after it latches to ensure an accurate reading.

Figure 6-1. Liquid Level Indicator

6. Check the ambient temperature where the Kidde Engineered System cylinders are stored and record the temperature.

7. Refer to the appropriate calibration charts (see Figures 6-2 through 6-7) and locate the level reading on the vertical axis (labeled Flexible Tape Reading). Trace horizontally to the right to the appropriate temperature line. Read the weight of the Kidde Engineered System from the scale at the bottom of the chart. Record the weight and date on the record tag attached to the cylinder.

8. After taking the reading, carefully push the tape down into the liquid level housing. Replace the protective cap.

Note: If the weight measured by the liquid level indicator indicates the cylinder should be recharged, we recommend the cylinder first be removed from service and the weight loss verified using a weigh scale before recharging.

All Kidde Engineered System cylinders must be filled or recharged by weight using a platform scale or equivalent. If weight loss is more than 5% of the Kidde Engineered System charge, the unit must be recharged.

CAP