Class1 3041-10X-00-CL1 - Sentry Governor - EXTERNAL - Manual (Page 11)

FORM-ENG-0018 REV A 05-27-03
607 NW 27th Ave
Ocala, FL 34475
Ph: 352-629-5020 or 1-800-533-3569
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TECHNICAL DATA SHEET
PAGE
10 OF 36
DATE 6/19/2014
PRODUCT GROUP THROTTLE CONTROL P/N 3045-101-00-CL1, 3045-102-00-CL1 REV 1.02
PRODUCT SENTRY PRESSURE GOVERNOR BY AMS
4.2. Operating mode selection
The SENTRY has two operating modes: throttle mode (RPM) and pressure mode (PSI).
Press the MODE button to select an operating mode. An operating mode will only be activated if the
required interlock(s) are in place (see section 4.3).
There is no variation in engine RPM or pump pressure when changing between throttle mode and pressure mode.
Pressure mode is the desired operating mode because it offers protection from pressure changes that could
injure personnel.
4.2.1. Throttle mode
Throttle mode (RPM) maintains a set engine RPM and will not deviate until the operator changes the RPM with
the control switches on the SENTRY. (Proper interlocking is required for normal operation – refer to Required Interlocking
section 4.3)
Throttle mode is typically used when…
•
priming the pump
•
connected to a stand pipe
•
the water supply pressure stability is questionable
•
acting as a relay pumper
Press the MODE button to select throttle mode. The RPM
mode indicator LED will illuminate blue.
Rotate the Twister knob in the INCREASE direction to
increase or the DECREASE direction to decrease the engine
RPM set point. The direction of increase can be set to
clockwise or counter-clockwise (see section 6.7.1).
Press a PRESET button to set the engine speed to the
configured preset RPM - as long as the pump pressure is
less than 10 PSI (see section 4.4).
Configure the throttle mode presets through the USER
Menu (see section 6.4.2 and 6.4.4)
Press the IDLE button (on Sentry or Twister) at any time to
set the SENTRY back to standby. Both mode indicator LEDs
will turn off when the engine speed reaches idle (see section
4.5).