Pneumax 120-60-DS, Руководство по установке

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Pneumax CAFS "DS" Series Installation Guide
Page 16 of 40
Verifying the Auto Sync Air Balancing System
This system seldom needs adjusting. For CAFS pre-built systems, the Auto Sync system is
adjusted at the factory before shipment. The FIXED mode is factory set for 145-150 PSI. In
most cases the factory settings will be satisfactory for typical CAFS and auxiliary air
applications.
If the system fails any verification step, go to Adjusting the Auto Sync Air Balancing System
and follow the steps in the order given.
1. UNLOAD mode verification
1. Set the controls on the Auto Sync control panel to FIXED and UNLOAD (UNLOAD for
electric controls).
Manual Valve Control Electric Valve Control
2. Close all air discharges.
3. Start the engine.
4. With the engine at idle, begin water flow through a discharge or tank recirculation.
5. The main air pressure gauge will read 40-50 PSI for the 250-120-DS model. It will be
lower for the 120-60-DSC, and in some systems the gauge needle may barely move. In
UNLOAD mode, this pressure is sufficient to maintain oil circulation.
2. FIXED mode verification
1. Raise engine RPM to avoid killing the engine
2. Place the controls on the Auto Sync control panel to FIXED and RUN (FIXED for electric
controls). Wait until the compressor pressure stabilizes.
3. The air pressure should be between 145-150 PSI, and stable.
3. AUTO mode verification
1. Open the throttle until the water pressure is at 100 PSI.
2. Place the controls to AUTO and RUN (AUTO for electric systems).
3. Read the main air pressure and water discharge pressure gauges.
4. The pressure readings should be the same (air may be up to 5% higher than water).
5. Vary the fire pump discharge pressure and monitor the water and air pressure gauges.
Air pressure should rise and fall with the water pressure, matching it or up to 5% higher.