64
Leakage Testing
• Connect a 1/4” pressure gauge to the Schrader service valve of the PAK assembly. Verify the pressure reads 0
psi. Refer to Figure 58.
• Prepare the tank cylinder assembly for leakage testing.
• Cylinder assemblies with one Schrader valve:
- Inspect the PAK hose O-ring. Replace O-ring if damaged or deformed. Refer to “TANK FIRE SUPPRES-
SION SYSTEM PARTS” on page 77.
- Quickly connect the PAK hose to the Schrader valve on the primary cylinder to minimize nitrogen loss.
Apply Leak Lock joint sealing compound on the sealing surface of the Schrader valve when connecting
the PAK hose to the tank assembly.
• Cylinder assemblies with dual Schrader valves:
- Place Schrader cap back on the tank cylinder secondary Schrader valve.
NOTE: PAK hoses with knurled fitting must ONLY be tightened by hand and not with a tool. If the PAK
hose with a hex fitting was loosened for any reason, this fitting must be torqued to 15 in-lbs.
• Monitor the pressure gauge on the PAK. The pressure must not read above 0.5 psi for 15 minutes. This indi-
cates the solenoid is in the de-energized state and will not let pressure through as intended. The gauge may
fluctuate between 0 and 0.5 psi.
CAUTION!: If pressure reads above 0.5 psi, immediately remove the primary actuator hose from the pri-
mary tank. Contact Service at 1-866-784-6900.
• Verify that the pistons in the PAK and SVAs are in the set position and not actuated. Refer to Figure 57 on
page 63.
Figure 58 - Leakage Test Setup
• Install the PAK and any SVAs onto their respective cylinders. Refer to Figure 59.
• Remove the pressure gauge on the PAK. Place the Schrader valve cap back onto the service port of the PAK
assembly. Tighten the cap.
• Spray the primary charge hose connection with a micro leak detector to check for leaks.
• Verify that the Supervisory Pressure Switches have reset per the control panel manual instructions.
• The system should be in the “Armed” position, and no faults should be active on the HMI when finished testing.
Figure 59 - PAK/SVA(s) Installed
1. PAK Reset and in the Ship/Test Position
2. SVA Reset and in the Ship/Test Position
3. PAK Hose Connected to Tank
4. Digital Pressure Gauge
1. PAK Installed
2. Schrader Cap
3. SVA Installed
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