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DESCRIPTION
Fireye PPC4000, the newest member of the Nexus family, is a state of the art parallel positioning
system for all types of liquid or gaseous fuel fired combustion systems. When combined with a Fir-
eye flame safeguard system such as the Fireye BurnerLogix control, the PPC4000 offers the most
compact and advanced parallel positioning system available. Four fuel profiles allow the PPC4000
to accommodate a variety of applications such as two fuels, with and without, the optional variable
frequency/speed drive (VFD/VSD). With each profile having up to 24 points entered to assure a
smooth “curve”, the microprocessors within the PPC4000 interpolate points between entered values
and precisely position fuel and air servos to within ± 0.1 degree, and the VFD to within 0.1% of its
full scale range. The result is improved efficiency by eliminating hysteresis typically found in slide
wire or single point positioning systems. Additional gains in burner efficiency can be realized by
adding the optional (VFD/VSD) drive board and Fireye O2 probe. The PPC4000 is capable of con-
trolling a total of ten servo motors, four servos per profile. All servo motors and displays operate on
a secure communications protocol and can be “daisy chained”/ multi-dropped together for simplified
wiring. Available servos from Fireye have torque ranges of 4 Nm (3 ft./lb.), 20 Nm (15 ft./lb.), and
50 Nm (37 ft./lb.). Two independent PID control loops for temperature or pressure control provide
precise, accurate control of firing rate for unmatched response to load changes. Ten safety rated user
definable line voltage inputs are standard and can be configured for functions such as burner on, set-
point select, lead lag, setback, etc. The PPC4000 also contains programmable relays that can be used
for various functions throughout the burner sequence. Built in lead lag sequencing for up to four
boilers is included in every PPC4000. The PPC4000 contains an SD (Secure Digital) card interface
that provides data logging of a burner’s operation at user defined intervals as well as upload/down-
load capability.
The User Interface, NXD410, contains a tactile feel keypad and a four line backlit LCD screen. The
NXD410 offers dedicated keys that facilitate various every day tasks done by the boiler operator.
Among these are C-MODE, BURNER ON/OFF, ADJUST SETPOINT, LOW FIRE, AUTO/MAN
(modulation) and LEAD LAG (sequencing). This eliminates the tedious task of entering various
modes and passcodes to search for the desired parameter. The NXD410 has a HOME screen that
shows four lines of instant and pertinent information about the current state of the burner. A HOME
key on the keypad will direct the user to this screen from anywhere within the menu system. An intu-
itive menu system and easy to use navigation keys optimally placed on the keypad provide an easy
flow to all parameters in the system. An INFO key is available that allows the installer/operator to
PPC-4001
JUNE 20, 2016
PPC4000
SERIES
FUEL AIR
RATIO
CONTROLLER
