Instruction Manual

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
11 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
4.3. Required interlocking
The TPG requires interlocks before engine control operations are permitted. The TPG provides two interlock inputs
that allow easy separation of pumping operations and throttle/high idle operations through two inputs dedicated as
system interlocks: THROTTLE READY (pin 2 of the 12-pin Deutsch connector) and PUMP ENGAGED (pin 10 of the
12-pin Deutsch connector).
A third interlock input (pin 4 of the 12-pin Deutsch connector) may be configured to control OKAY TO PUMP (menu
level 5, see section 5.2).
These interlock inputs are activated when system power is applied (positive polarity).
The OEM is responsible for creating safe and effective interlocking routines.
The TPG utilizes back lit text below the main display to indicate interlock status.
THROTTLE READY interlock
PUMP ENGAGED interlock
OKAY TO PUMP
Apply system power to pin 2 of the
12-pin Deutsch connector (through
OEM interlocking).
THROTTLE READY text illuminates
green.
Apply system power to pin 10 of the
12-pin Deutsch connector (through
OEM interlocking).
PUMP ENGAGED text illuminates
green.
When THROTTLE READY and
PUMP ENGAGED interlocks are
applied the OKAY TO PUMP text
illuminates green (default), unless
the OKAY TO PUMP interlock has
been configured to function with pin
4, then the OKAY TO PUMP text
only illuminates when pin 4 of the
12-pin Deutsch connector has
system power applied (through OEM
interlocking).
The TPG will operate in throttle
mode (RPM) only.
The TPG will not operate in any
mode until the THROTTLE READY
interlock is applied.
The TPG will operate in throttle
mode (RPM) or pressure mode
(PSI).
4.4. PRESET switch operation
The PRESET switch brings the discharge pressure (or engine RPM, in throttle mode) to the configured
preset point (see section 5.2.2 and 5.2.4).
Using the PRESET switch is a method of smoothly and expeditiously attaining water pressure and flow, but it is not
intended to be the initial attack pressure. Attack pressures and flows should be determined by the actual fire status
and manually achieved for best operation.
PRESET is an operational convenience and needs to be considered as a fixed point (higher or lower than the current
point) that can be achieved with a single switch press.
Note: Initiating pumping operations is simplified by bringing the pump to a preset pressure with a single switch press.
Consequently, securing or regaining control operations can be aided by returning to this fixed pressure point with a
single switch press.