Waterous 200-B, Инструкция по установке и обслуживанию, Страница: 25 / 54

Waterous 200-B Belt-Driven Installation Guide Rev-
Page 25 of 54
3. The target operating pressure is 145-150 PSI. Monitor the air pressure reading
as you adjust the regulator screw. Give the system several seconds to stabilize
between adjustments, and make partial turns of the screw to avoid overshooting
the target pressure.
•
Turning the screw IN (CW) will increase pressure.
•
Turning the screw OUT (CCW) will decrease pressure.
4. After the desired fixed pressure is achieved, tighten the lock nut.
7. Verify that the fixed regulator is performing properly by varying the engine speed
as you watch the air pressure gauge. The pressure should remain steady at the
setting you made. Repeat steps 2 through 4.
Turn the control to UNLOAD and back to RUN (To UNLOAD and back to FIXED for
electric valves). The air pressure should rise to the fixed pressure. It may overshoot and
drop back to the target pressure, but that is normal.
After the FIXED mode is adjusted, proceed to AUTO mode adjustment.
C. AUTO Mode Adjustment
The pressure for the FIXED mode must have been correctly set before you
attempt to adjust the AUTO mode.
1. Make sure the fire pump is operating at 100 PSI at the main discharge, with
minimal flow.
2. Place the controls on the Auto-Sync control panel to AUTO and RUN. (AUTO for
electric valves.)
3. Read the main air pressure and water discharge pressure gauges.
4. The air pressure reading should be equal or up to 5% higher than the water
pressure. If the readings are in this range, go to step 7 and verify the operation
at other pressures.
5. If the air pressure is not 5% of the water pressure, adjust it as follows:
If the air pressure is too high, turn the Air Inlet Trim Valve clockwise in 1/2
turn increments to close it, checking air and water pressure after each 1/2
turn.
If the air pressure is too low, turn the Air Inlet Trim Valve counterclockwise
1/2 turn to open it and check pressures. If the air pressure is still too low,
open the valve another 1/2 turn and check the pressures again.
Do not open the Air Inlet Trim Valve more than this. Use the PBTV if the
pressure remains too low.
6. If the air pressure remains too low, close the needle valve on the Piloted Balance
Trim Valve (PBTV) one full turn clockwise and check the pressure gauges.