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The modulator valve is set at the factory to modulate
at the compressor's rated pressure. For example a
compressor with a 125 psig (8.6 bar) pressure rating
will modulate up to 60% capacity when the system
pressure is near the default off line setting of 128 psig.
(8.8 bar). The following procedure describes the
method of setting the modulation valve. The desired
pressure should never be more than 3 psig (.2 bar)
below the off line pressure entered during the set
point routine. For example if the off line pressure is set
at 96 psig (6.6 bar), the desired set point pressure
should be 93 psig (6.4 bar).
Ensure that the compressor is isolated from the
compressed air system by closing the isolation valve
and venting pressure from the system.
Ensure that the main power disconnect switch is
locked open and tagged.
1. Remove the 1/8" NPT plug from the tee in the
control piping and connect a pressure gauge to this
port.
2. Reconnect power to the compressor. When display
reads "READY TO START," enter the set points
routine and set control mode to "MODULATION".
3. Start the compressor and elevate system pressure
to desired set point pressure. This pressure must be
maintained while adjusting the modulator valve.
4. Loosen the lock nut on the bottom of the modulator
valve and turn the adjusting screw to modify the
modulation valve set pressure. Turning the screw
counterclockwise (as viewed from the top) raises the
set point pressure. Turning the screw clockwise lowers
the set point pressure.
5. Adjust the screw while maintaining system pressure
at the desired value until the output pressure of the
modulator valve is 30 psig (2.1 bar). Tighten the
locknut.
6. Stop the compressor and lock open the main
disconnect. Ensure that all pressure is vented from the
system.
7. Remove pressure gauge from modulation valve and
re-install 1/8" NPT plug in tee in control piping using
Loctite® PST or equivalent to seal threads.
Содержание EP 60
Страница 18: ...16 FIGURE 2 5 1 TYPICAL OUTDOOR SHELTERED INSTALLATION ...
Страница 31: ...29 NOTES ...
Страница 44: ...42 7 0 REFERENCE DRAWINGS 7 1 ELECTRICAL SCHEMATIC FULL VOLTAGE 39899794 REV 02 ...
Страница 45: ...43 7 2 ELECTRICAL SCHEMATIC STAR DELTA 39899786 REV 02 ...
Страница 46: ...44 7 3 FOUNDATION PLAN AIR COOLED 39894472 REV 03 ...
Страница 47: ...45 7 4 FOUNDATION PLAN WATER COOLED 39907894 REV 03 ...
Страница 48: ...46 7 5 FOUNDATION PLAN OUTDOOR MOD 39907886 REV 03 ...
Страница 49: ...7 6 BASIC FLOW SCHEMATIC AIR COOLED 39899828 REV 02 47 ...
Страница 50: ...48 7 7 BASIC FLOW SCHEMATIC WATER COOLED 39899836 REV 02 ...
Страница 51: ...49 7 8 TYPICAL SYSTEM FLOW DIAGRAMS TYPICAL SYSTEM FLOW DIAGRAM ...
Страница 52: ...50 7 8 TYPICAL SYSTEM FLOW DIAGRAMS ...
Страница 53: ...51 7 8 TYPICAL SYSTEM FLOW DIAGRAMS ...
Страница 54: ...52 7 8 TYPICAL SYSTEM FLOW DIAGRAMS ...
Страница 55: ...53 7 8 TYPICAL SYSTEM FLOW DIAGRAMS ...
Страница 59: ...57 DATE RUN TIME WORK DONE QTY UNIT WORK HOURS MEASURE BY 9 0 MAINTENANCE RECORD ...
Страница 60: ...DATE RUN TIME WORK DONE QTY UNIT WORK HOURS MEASURE BY MAINTENANCE RECORD 58 ...
Страница 61: ...59 DATE RUN TIME WORK DONE QTY UNIT WORK HOURS MEASURE BY MAINTENANCE RECORD ...
Страница 62: ...60 DATE RUN TIME WORK DONE QTY UNIT WORK HOURS MEASURE BY MAINTENANCE RECORD ...