Class1 117155 - TPG Governor - 117684 EXTERNAL - Manual (Page 10)

FORM-ENG-0018 REV A 05-27-03
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Ocala, FL 34475
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TECHNICAL DATA SHEET
PAGE
9 OF 26
DATE 3/28/2012
PRODUCT GROUP THROTTLE CONTROL P/N 117155 REV 1.23
PRODUCT TOTAL PRESSURE GOVERNOR (TPG) BY AMS
Manual P/N 117684
4. Operation
4.1. Initialization
The TPG has a five (5) second power initialization cycle and during this time the display will show:
4.2. Operating mode selection
The TPG has two operating modes: throttle mode (RPM) and pressure mode (PSI).
Press the MODE switch 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 TPG’s control switches. (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 switch to select throttle mode. The display will
momentarily show “GOV=THROTTLE” and the RPM mode
indicator LED will illuminate blue.
Press the INC switch to increase or the DEC switch to decrease
the engine RPM set point.
Press the PRESET switch 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 preset through the Setup Menu
(see section 5.2.1).
Press the IDLE switch at any time to set the TPG back to
standby. The display will momentarily show “IDLE” and both
mode indicator LEDs will be off (see section 4.5).
The display shows
“–Class1 TPG–“
for 1 second.
The display shows the
software version number
for 1 second.
The display shows
“Initializing”
for 3 seconds.
The TPG begins normal
operation by displaying the
engine RPM.