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Table of Contents
This bulletin describes the installation and commissioning of the PPC5000 fuel / air ratio controller. It may be used in conjunction with
the following other bulletins:
— Nexus NEX-1001 bulletin
— ComFire combustion analysis tool user bulletin
— Nexus / PPC5000 boiler sequencing bulletin
Description ....................................................................................................................................1
Safety information.........................................................................................................................4
Installation .....................................................................................................................................5
Mounting the display.....................................................................................................................6
Circuit board removal....................................................................................................................7
Option link selection .....................................................................................................................8
Servo-motor Selection...................................................................................................................9
Wiring..........................................................................................................................................10
Operation in run mode.................................................................................................................16
Start-up sequence ........................................................................................................................19
Modulation ..................................................................................................................................20
Safety shutdown (burner lockout) ...............................................................................................20
The display ..................................................................................................................................21
Motor adjustment ........................................................................................................................24
Feedback potentiometer ..............................................................................................................24
Control direction .........................................................................................................................24
Adjusting microswitch positions .................................................................................................24
Locking the servo-motor to the valve shaft.................................................................................25
Operation in commissioning mode .............................................................................................26
Commissioning data ....................................................................................................................26
Option set mode ..........................................................................................................................27
Commission ratio mode ..............................................................................................................28
Adjust ratio mode ........................................................................................................................29
Finding the software issue & unit configuration .........................................................................31
The oxygen trim option ...............................................................................................................32
Oxygen probe description ...........................................................................................................32
Installation of oxygen probe........................................................................................................33
Wiring..........................................................................................................................................35
Interface to auxiliary equipment .................................................................................................37
Calibrating and servicing the oxygen probe................................................................................38
Removing the oxygen probe .......................................................................................................39
SOx, NOx, smoke, CO, AUX1, AUX2, O/P1, O/P2 ..................................................................40
Oxygen trim operation ................................................................................................................40
Commissioning oxygen trim .......................................................................................................40
Flow calculation table .................................................................................................................43
