TGA100 Rev0106
15
RPM Mode Operation
In the RPM mode of operation the
RPM
LED will be on. The INControl will
maintain a constant engine RPM.
The pump discharge pressure can vary but, as a safety feature, the INControl
limits the increase in pressure to 30 PSI over the last established PSI value. As the
discharge pressure approaches this limit the INControl will automatically lower the
RPM to prevent a high pressure surge. The
RPM
LED will blink as the INControl
sets a lower RPM. This lower RPM will be the new operating RPM setting. Press any
button and the LED will stop blinking.
Note: When changing from pressure mode to RPM mode the RPM setting
will be the RPM that the pump was operating at in pressure mode.
1. Press and hold
RPM
mode button for 3 seconds.
Result:
RPM
LED goes on.
2. Press
PRESET
and/or
INC/DEC
button to select the operating RPM.
3. Press
IDLE
button after operations to bring engine to idle RPM.
Result: Display shows
IdLE.
Switching Between Operating Modes
•
No variation in discharge pressure or RPM will occur when changing between
pressure and RPM modes.
•
When changing to RPM mode, the RPM setting will be the RPM that the
pump was operating at in pressure mode.
•
When changing to pressure mode the pressure setting will be the pressure that
the pump was operating at in RPM mode.
When the INControl RPM display shows IdLE:
Press the mode button and the INControl switches modes immediately.
When the INControl RPM display shows a value (operating at some setting):
Press and hold the mode button for 3 seconds and the INControl changes
modes. (This is to avoid an accidental change over if the buttons get bumped.)
High Pump Discharge Pressure at Engine Idle
Once the governor has set the engine to idle, it can do no more to reduce discharge
pressures. To reduce discharge pressure the pump operator can gate incoming water,
reduce pressure at the intake relief valve, gate discharges, or disable the pump.
