Fireye NEXUS NX3000 Manual
  1. Manuals
  2. Brands
  3. Fireye Manuals
  4. Control Systems
  5. NEXUS NX3000
  6. Manual

Fireye NEXUS NX3000 Manual

Integrated burner control system
Hide thumbs
Table of Contents

Advertisement

Quick Links

®
NEX-1001/3.1
JULY 2003
NEXUS
INTEGRATED BURNER
CONTROL SYSTEM

DESCRIPTION

™
The Fireye NEXUS
Integrated Controller is a microprocessor based, Flame Safeguard and parallel
positioning combustion controller built into one compact, user configurable package. The system
consists of the Controller, Display, Wiring sub-panel, Temperature / Pressure Sensors, Servo-Motors
and ComFire Software.
The Flame Safeguard portion of the control package provides burner sequencing including safe start
check, proof of main valve closure, selectable main gas safety proving sequence, supervised pre-
purge, low fire starting position, pilot and main trials for ignition, main flame supervision, and post
purge. Safety event timings are provided to meet North American and CE Standards. Time proven
Fireye Flame Scanners and amplification circuits using UV, UV-Self Check and Infrared sensors,
provide fast reliable scanning of most commonly burned fuels. Ten user defined auxiliary inputs pro-
vide supervision of safety critical and non-safety critical inputs.
Control of up to four Channels using an independent Servo-Motor for each controlled element
allows precise positioning, accurate to 0.1 , of the fuel and air metering devices over the burner's fir-
ing range. One of two fuel profiles can be selected for each fuel channel with up to 24 positions per
profile including; Closed, Purge, Ignition (Preferred Start™), Low Fire and an additional 20 interme-
diate points from low to high fire. Each individual servo-motor's position and speed are verified and
lockout will occur should either of these parameters be exceeded.
Modulation control is provided via the pressure/temperature sensor's input. The Fireye NX1025,
NX1030 or NX1040 sensors provide checking circuits for fail safe operation. PID setpoints are
available for the chosen modulation input, selectable up to two decimal points. Track modulation is
available for those applications requiring less precise control.
The NX550 Display allows commissioning and current status of the system through the use of its
tactile membrane keypad. Multi-function keys allow the commissioning engineer the ability to
access the various Ratio Modes and Option Select menus. The two line 20 character Vacuum Fluo-
rescent Display clearly illuminates the Control Variable, Firing Mode, Fuel Selected and Hours Run.
It further allows the Boiler Operator access to the Auto/Manual selector, Motor Data (servo posi-
tions) and other operational parameters such as System Sequence Position, Valve Proving Sequence
Status, Gas Pressure, Flame Signal, Modulation Rate and Setpoint, as necessary.
Multiple Boiler Sequencing is accomplished through an RS485 Communications bus using ComFire
software. Lead/Lag and Standby set points for up to ten (10) boilers can be configured.
1

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the NEXUS NX3000 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Fireye NEXUS NX3000

Summary of Contents for Fireye NEXUS NX3000

  • Page 1: Description

    Safety event timings are provided to meet North American and CE Standards. Time proven Fireye Flame Scanners and amplification circuits using UV, UV-Self Check and Infrared sensors, provide fast reliable scanning of most commonly burned fuels. Ten user defined auxiliary inputs pro- vide supervision of safety critical and non-safety critical inputs.
  • Page 2 “Site”, “Adjust Ratio”, and “Supplier” passcodes are issued with each Control for maximum protec- tion of the commissioned values. All Setpoints and Options are password protected through the three levels of protection. The various password levels provide Operators with “Site” protection, Owners with “Adjust Ratio”...

  • Page 3: Table Of Contents

    ® Table of Contents This manual (NEX-1001) describes the installation, commissioning, operation and maintenance of the NX3000/3100/4000/4100/5100* integrated burner controllers with software revision up to and including Version 3.10. It may be used in conjuction with the following other manuals: NEX-1501 - ComFire combustion analysis tool user manual NEX-SO - Boiler sequencing manual NEX-1002 NEXUS Expansion Interface and Expanded Burner Control System...

  • Page 4: Technical Specifications

    Technical Specifications General Supply Voltage: 120/230 VAC Power Consumption: Approx. 20VA Supply Frequency: 50/60Hz Ambient Temperature Range: 32 -140°F (0 to 60°C) Maximum Connected Load: 2000 VA Control Unit Protection Category: NEMA 1 (IP 00) The unit must be situated in a clean environment according to EN 6730-1.
  • Page 5 +/-50 mA absolute maximum Burden Resistor: 220R nominal Accuracy: +/-1.2% of full scale Communications Interface 2-wire RS485 plus ground, with termination resistor selected using a link. See NEX-1501 serial communications protocol manual for details. External Display Interface Interface: Fireye specific...
  • Page 6 NX1020-1, -2 Gas Pressure Sensor Supply Voltage: 24Vdc +/-10% Supply Current: Approximately 10mA Ambient Temperature Range:32 - 160°F/ 0 to 70°C Protection Category: NEMA 3 / IP44 Dimensions: 1 3/4" (44mm) dia x 3 3/8" (85mm) long (incl. connector) Pipe Thread Mounting Dimensions: "...

  • Page 7: Approvals

    ® Approvals UL 372 Primary Safety Controls for Gas and Oil Fired Appliances Classification in accordance with EN298: F/T/L/L/J/B Tested in accordance with the Gas Appliance Directive (GAD 90/396 EEC), encompassing the following standards: • ENV1954, Internal and external behavior of safety related electronic parts •...

  • Page 8: Installation

    INSTALLATION This section contains basic installation information concerning choice of enclosure and servo-motor environment, wiring specification and connection details. CAUTION: Read these instructions carefully and ensure you fully understand the product requirements. Failure to follow them could damage the product or cause a hazardous condi- tion.
  • Page 9 ® Mounting the Display FIGURE 2. Keypad Dimensions The display should be mounted on the front of the burner cabinet, or similar accessible location. It extends for 1. 2” (40mm) behind the panel, and PANEL FRONT 0.2” (3mm) in the front of the panel. 4 HOLES (M4 CLEAR) PANEL CUT-OUT 3 7/16”...
  • Page 10 Control Unit Exploded View (listed wiring base) FIGURE 3. CONTROL UNIT ENCLOSURE CPU BOARD PSU BOARD BASEPLATE COVER (UL listed base only) BACKPLANE BOARD BASEPLATE...
  • Page 11 Servo-Motor Installation Fireye NX04, NX20 and NX50 Servo-Motors are available in 3 ft. lbs (4 Nm), 15 ft. lbs (20Nm) and 37 ft. lbs (50 Nm) versions. The accuracy of the final setup is contingent on the proper application of the motor to the controlled element.
  • Page 12 * Dimensions for clearance only, refer to Servo -Motor bulletin for exact dimensions Optional Servo-Motor Requirements Should the Servo-Motors not be supplied by Fireye the following guidelines should be followed when selecting suitable motors; All servo-motors must be of the same operating voltage, not exceeding 250V rms (high voltage ver- sion), 50V rms (low voltage version).

  • Page 13: Wiring

    ® Wiring CAUTION: Disconnect the power supply before beginning installation to prevent electrical shock, equipment and/or control damage. More than one power supply disconnect may be involved. Wiring must comply with all applicable codes, ordinances and regulations. Wiring, where required, must comply with NEC, Class 1 (Line Voltage) wiring. Loads connected to the Controller must not exceed those listed in the specifications as shown in this manual.
  • Page 14 Using the cable clamp: Clamping bars are provided on the control unit for termination of cable screens where necessary. The cable should be prepared by cutting around the outer sleeve, taking care not to damage the shield (1). Pull the sleeving apart to expose 3/8" (10mm) of the screen (2). Slide the exposed length of shield between the clamping bars (3).
  • Page 15 ® Ignition, pilot valve, main valves, vent, and auxiliary relay outputs: If using proof of closure switches for either fuel valve, ensure they are wired IGNITION PB 6 to the relevant auxiliary inputs and the corresponding option parameter is set PILOT VALVE PB 8 accordingly (refer to option parameter 10.1 -10.9).
  • Page 16 Oil, Gas, Fault Mute(Reset) Inputs: These inputs, if not required for the functions shown, can be wired in the same way and used for non- safety related functions. Refer to Option Parameters 10.0, 10.6 and 10.7. WARNING: The fault mute (reset/silence) switch must be within sight and sound of the burner. These inputs should be connected using multi-strand- I/P 1, 2, 3 COM PF 1...
  • Page 17 ® Motor up/down outputs and feedback potentiometer inputs: The motor up/down outputs should be connected LINE/MOTOR using multi-strand single conductor PVC insu- SUPPLY MAX 4A MOTOR COM PA 1 lated 20AWG, 600V 90°C (16/0.2MM) wire. Wiring must comply with all applicable codes, MOTOR UP PA 2/4/6/8 ordinances and regulations and where required MOTOR DN PA 3/5/7/9...
  • Page 18 The pressure/temperature cabling must GAS PRESS SUPP PE 16 NX 1020 be overall shielded 4-conductor PVC GAS PRESS IN PE 17 insulated 22AWG-7/30, 300V 80°C PRESSURE SENSOR (7/0.2mm) wire. Wiring must comply GAS PRESS GND PE 18 GAS PRESS TEST PE 19 with all applicable codes, ordinances and regulations and where required BODY...
  • Page 19 ® RS485 interface The RS485 cabling must be overall shielded 3-conductor PVC insulated 22AWG-7/30, 300V 80°C (7/0.2mm) wire. Terminate the screen shield at one unit only using the cable clamp provided. For details on connecting NX Series integrated burner controllers and a PC onto the communications bus, refer to bulletins NEX-1501(ComView combustion analysis tool) or NEX-SO (boiler sequenc- ing).
  • Page 20 It is imperative the shield of this cable is connected to the display unit’s metal housing. This should be achieved as follows: Cut back approximately 4" (100mm) of overall insulation. Open the braided shield adjacent to the remaining insulation and pull all 6 cores through the opening.

  • Page 21: Option Link Selection

    ® OPTION LINK SECTION The NX1486,1366 Wiring Bases have a number of option selection links, located on the circuit board. The function and settings are marked on the board alongside each link. These links must be set to the correct position before power is applied to the unit. Line Supply Voltage (LK1 - 4) The possible supply voltages are listed below, together with the necessary fuse rating.
  • Page 22 RS485 TERM (RS485 serial communications termination resistor) Please note there are two RS485 connections to the unit, one non-iso- lated and one optional, which is isolated. The position of the termination link is important only if theRS485 serial communications are to be used, JP7 if the optional isolated RS485 output and JP6 is for the non-isolated RS485 output.

  • Page 23: Flame Scanners

    (45UV5) or the infrared flame scanner (48PT2) which uses auto-check amplification circuit. SCANNER SELECTION FIREYE P/N BULLETIN DESCRIPTION 48PT2-1003 Infrared 1/2" straight mount 96" (2.4m) cable...

  • Page 24: Operation In Run Mode

    OPERATION IN RUN MODE Start-up sequence When a fuel selection is made and the burner select signal is given to start up the burner, the control unit runs through the sequence described below. If gas is the selected fuel and gas valve proving has been selected, the unit also performs safety valve pressure proving in parallel with the start-up sequence (see option parameter 2.0 Gas Pressure Select).
  • Page 25 ®...

  • Page 26: Gas Safety Valve Proving Sequence

    GAS SAFETY VALVE PROVING SEQUENCE If the gas valve proving is enabled (refer to section option select 2.0) and a gas profile is selected, the unit will begin the gas safety valve proving sequence on stage 3 of the start up sequence. If any step of the gas valve proving sequence fails, the unit will perform a safety shutdown and lockout the burner.
  • Page 27 ® Modulation During stage 16 (modulation), the unit will position the fuel and air motors as programmed for the profile selected. In auto modulation mode, the system will modulate as necessary to either track the input or maintain the pressure/temperature of the boiler at the entered setpoint (see Option Parameter 5.3 - 5.8). If boiler sequencing is enabled and active, the unit will start, stop and modulate according to instruc- tions issued from the unit controlling the lead boiler.

  • Page 28: The Display

    THE DISPLAY Description The display is a 2 line 20 character per line dot matrix vacuum fluorescent unit allowing the use of plain text messages for most display parameters. The display must be mounted to allow commission- ing of the system but once commissioning has been completed, the display may be removed, provid- ing external switches and/or lamps are mounted for fault indication and reset.

  • Page 29: Control Led Indicators

    ® HOURS RUN Displays the hours run for the current profile selection. If no profile is selected, the display will show ‘---’. This display parameter is used in commission ratio. This display is used in adjust ratio mode. They indicate the profile setpoint currently under adjustment or being displayed. If the display is flashing, the unit is waiting for an event to occur before the point may be altered.

  • Page 30: Servo-Motor Adjustment

    SERVO-MOTOR ADJUSTMENT Feedback Potentiometer WARNING: The servo-motor internal feedback potentiometer must be secured within the servo-motor to ensure that there is no possibility that the potentiometer can become discon- nected from the motor output shaft. For each servo-motor, it is necessary to adjust the potentiometer’s position relative to its shaft in order to obtain the correct open and closed positions on the display.
  • Page 31 ® Locking the Servo-Motor to the Valve and Damper Shaft WARNING: Once the control and feedback connections to the servo-motors are correct, each servo-motor must be locked to its shaft for all dampers and fuel valves. In order to prevent the joint between servo-motor and shaft moving, it is recommended that the device used to link the two items is pinned together.

  • Page 32: Operation In Commissioning Mode

    OPERATION IN THE COMMISSIONING MODE (Using the Commissioning Display) WARNING: While the unit is in commissioning mode or adjust ratio mode certain safety checks cannot be performed by the NX Series Controller and therefore the safety of the system operation is the sole responsibility of the commissioning engineer. Do not allow the fuel to accumulate in the combustion chamber for longer than a few seconds without igniting, an explosive mixture could result.
  • Page 33 ® Profile Setpoints Setpoints contain information about required servo-motor positions. There are four tables of set- points (or four profiles), which may be visualized using the diagram below: PROFILE 1/3 PROFILE 2/4 AIR 1 AIR 2 OIL POSITION AIR 2 AIR 1 POSITION (°) POSITION (°)
  • Page 34 To exit option set mode and return to commission ratio or adjust ratio mode, press the key labelled FAULT (MODE) again. OPTION SET MODE RUN MODE DATA To exit option set mode and return to run mode, press the key labelled DATA (RUN) and then COM (ENTER).
  • Page 35 ® The procedure for entering or modifying a profile is as follows: Enter commission ratio mode (see page 34). P0 0 (close) is displayed. If the close setpoint has been entered before and no change is required, press AUTO MAN (NEXT).

  • Page 36: Operation In Adjust Ratio Mode

    Adjust Ratio Mode Description Adjust ratio mode is used only for changing an existing profile. • Using adjust ratio mode, it is possible to modify the servo-motor positions for any setpoint in the firing range from low to high fire (P03 and higher). •...
  • Page 37 ® The procedure for modifying a setpoint is as follows: Enter adjust ratio mode. “A n” is displayed in addition to the servo-motor positions, where n is the number of the setpoint which is closest to the current firing position. Use the LEFT/RIGHT scroll keys to point to the profile point number “A n”...

  • Page 38: Option Parameters

    OPTION PARAMETERS CAUTION: Use extreme care when entering option parameters. Incorrect data entry could cause a hazardous situation to occur. Option Parameter List Note: If an option parameter is marked with *, it is not possible to adjust its value using the site passcode.
  • Page 39 ® Option 1.5 - Reset hours run (0 - 1)* This option parameter allows the HOURS RUN display for all fuels to be reset to zero. To perform a reset, set this option parameter to 1 and leave option set mode. When the burner begins to modulate, the HOURS RUN display will be reset and the option parameter automatically returns back to 0.
  • Page 40 Option 2.7 - Maximum permissible leakage rate (0 - 99.9 l/h)* This is the maximum permissible leakage rate allowed during the valve leak test (in liters per hour). this value must be set according to the installation and local regulations. Refer to “Valve Prove Test Sequence”...
  • Page 41 ® Option 4.0 - Safety time configuration (0 - 10) Determines which set of safety times are used. This value must be set according to the application and local regulations. Configuration Prove Air Supervised Pre- Pilot Trial Pilot Main Trial ** Wait for Pressure Purge...
  • Page 42 Option 4.5 - Permanent gas pilot select (0 -1 intermittent pilot)* This option parameter allows the selection of permanent pilot operation when the burner is firing on gas. When firing on oil this operating parameter is ignored. Non permanent pilot. (Interrupted pilot) Permanent pilot operation, when firing on gas.
  • Page 43 Option 5.6 - Boiler high safety limit (0 - 999[NX1040] / 0.0 - 99.9[NX1030])* If a Fireye fail safe boiler sensor is used (such as the NX1025, NX1030 or NX1040) and track mod- ulation input is not selected, the unit may be used to monitor the boiler high safety limit and perform a shutdown if the limit is exceeded (see Fault Code Listing F41 for details).
  • Page 44 Option 5.8 - Auxiliary modulation input function (0 - 2)* The auxiliary modulation input (terminals PE 13, 14, 15) may be configured to perform a remote set- point function. See Derivation of Modulation rate for information on how this function is performed. No function.
  • Page 45 ® When setpoint 1 is selected and the remote setpoint function is enabled (see Option 5.8), this is the PID control value displayed when a 4mA signal is present on the auxiliary modulation input. See Derivation of Modulation Rate. There is no such function for setpoint 2. This parameter is not used when a track modulation input type is selected.
  • Page 46 Option 8.1 - Setpoint 2 zero value (0 - 999 / 00.0 - 99.9 / 0.00 - 9.99)* When setpoint 2 is selected, this is the measured value which is displayed when the minimum signal level (0V or 4mA) appears at the modulation input. This parameter is not used when a track modula- tion input type is selected.
  • Page 47 ® Option 9.6 - Setpoint 2 warming time (0 - 999) If the boiler’s measured value remains below the warming limit set in option 09.5 for longer than the warming time set here in minutes, the boiler will be allowed to modulate normally. Options 10.0 to 10.9 - Auxiliary input functions Option parameters 10.1 to 10.9 determine the functions of the 10 auxiliary inputs.
  • Page 48 Auxiliary Input Switch Functions No function or default function as listed above. Auto/manual selection. A high level on the input forces the unit into manual modulation mode. Manual up. A high level on this input will force the unit to modulate up if manual is selected via one of the other auxiliary inputs. Manual down.
  • Page 49 ® Option 11.0 - Relay Output Enable (0 -1)* Option parameter 11.0 enables the Alarm 2 output for selected indication as listed in Option 11.9. Relay outputs disabled Relay output enabled. The control outputs data as set in Option 11.9 to control the relay. Option 11.9 - Alarm Output (0 -20)* This option parameter allows the control to output via volt-free relay contacts, various fault or status conditions.
  • Page 50 Option 12.0 - Boiler sequencing enable (0 - 1) This option parameter enables boiler sequencing control via the RS485 serial communications inter- face. Sequence control disabled. The unit operates in a stand-alone mode. Sequence control enabled. The unit will modulate and sequence its boiler according to instructions received from the lead boiler. If communication with the lead boiler is lost, the unit operates in stand-alone mode.
  • Page 51 ® Option 13.1 - Sustained modulation time before OFF/ON transition This parameter is an optional time delay, which is applied when the normal modulation limit for a slave to be activated is reached. Once the time limits specified in option parameters 12.7 & 12.8 have passed (or always, in the case of a two boiler system), the modulation from the PID control is monitored.
  • Page 52 DERIVATION OF MODULATION RATE FIGURE 10. 6.1, 6.2 6.4, 6.5, 6.6, 7.X Switch by 6.0 10/1. 10.2 COMMS PE21 LOWEST ZERO 6.0 = 0 SETPOINT PRIORITY & & 6.0 = 1,2,3 SELECT Measured SPAN Modulation LIMITS Value 6.7, 6.8 LOWEST PRIORITY ZERO &...

  • Page 53: Faults And Fault Finding

    ® FAULTS AND FAULT FINDING The Fault Display The unit carries out a number of internal and external checks during operation. If a fault is found, a fault number is used to identify the type of problem. A list of fault numbers may be found later in this sec- tion.
  • Page 54 Fault Listing = LED ON = LED OFF NAME DESCRIPTION A B C D E F G Fuel 1 servo-motor A drive positioning fault has occurred, which will cause a safety shutdown of incorrect position the burner. This fault has occurred for one of the following reasons: Fuel 2 incorrect 1.
  • Page 55 ® = LED ON = LED OFF NAME DESCRIPTION A B C D E F G Gas pressure limit The measured gas pressure is outside the operating limits (subset: valve prove status), or the gas pressure sensor is not responding correctly Subset: 10.
  • Page 56 The boiler’s measured value has exceeded the pressure/temperature safety exceeded limit, or the Fireye pressure/temperature sensor is not responding correctly. Subset: 1 - sensor feedback < 1V, 2 - sensor feedback > 5V, 3 - sensor failed during test, 4 - safety limit exceeded...
  • Page 57 ® = LED ON = LED OFF NAME DESCRIPTION A B C D E F G Oxygen probe purge The measured value from the oxygen probe was less than 18.0% at the end of check pre-purge. Trim is disabled. Subset: Oxygen level x 10 Auto trim commis- The measured oxygen level exceeded 15.0% during auto trim commissioning.
  • Page 58 NAME DESCRIPTION A B C D E F G Drive selection fault Selected profile requires drive which is not available, check option parameters 1.3, 14.x . Aux 1 Limit The 4-20mA auxiliary input signal is above the limit set by the corresponding option parameter.

  • Page 59: Engineer's Key

    THE ENGINEER’S KEY The engineer’s key is a hidden key under the Fireye logo on the display. With the use of the engi- neer’s key it is possible to read the values of internal system variables and external input and output states.
  • Page 60 ENGINEER’S KEY PARAMETER LIST NAME DESCRIPTION EK24 Lead Lag Status 0 - Boiler sequencing inactive 1 - Boiler held off via sequence control 2 - Boiler in standby via sequence control. 3 - Boiler modulating via sequence control. 4 - Boiler is lead via sequence control EK25 Burner status Status of the start-up sequence.
  • Page 61 ® ENGINEER’S KEY PARAMETER LIST NAME DESCRIPTION EK38 Valve Close Time t Time for which each half of the valve prove test will be conducted (refer to test Gas safety valve proving sequence for details). This time counts down to zero during stages 2 and 4 of the valve prove test.
  • Page 62 ENGINEER’S KEY PARAMETER LIST NAME DESCRIPTION EK72 O2 Probe Status +1 - Offset fault * optional NX280HW expansion unit +2 - Gain fault must be installed +4 - Heater fault +8 - Cell mv too high +16 - Oxygen level <18% during pre-purge EK73 O2 Trim Status 0 - O2 trim working, or...

  • Page 63: Troubleshooting

    ® TROUBLESHOOTING Display Problem PROBLEM POSSIBLE CAUSE SUGGESTED ACTION Display will not light. Display wired incorrectly. Check wiring to connector PE. Display shows garbage. Keys do not work. Display will not light. Fuse blown on backplane board. Check fuse. If blown, investigate all external wiring and replace fuse with a new one of the correct type and rat- ing.
  • Page 64 Commissioning Problem PROBLEM POSSIBLE CAUSE SUGGESTED ACTION Cannot get past P0. Unit in safety shutdown. Hold FAULT MUTE key when faults clear. Air pressure switch still made. Wait for burner fan to stop. No fuel selected. Check EK1 (oil input) and EK2 (gas input). Burner not selected.
  • Page 65 ® Modulation Problem PROBLEM POSSIBLE CAUSE SUGGESTED ACTION Sensor or modulation rate V/I input setting incorrect. 5/24V supply set- Check option parameter 05.5. Check SENSOR IN and inaccurate. ting incorrect. SUPPLY links. Intermittent positioning Lead drive setting incorrect. Change lead drive (option param. 05.1/05.2). faults.

  • Page 66: Commissioning Sheet

    COMMISSIONING SHEET Site: Engineer: Comments: Serial No: Boiler No: Fuel: Date: OPTION DESCRIPTION VALUES ALLOWABLE VALUES Site Passcode 0-999 Serial Communication Passcode 1 0-999 Serial Communication Passcode 2 0-999 Expansion Module Passcode 1 0-999 Expansion Module Passcode 1 0-999 Main Supply Frequency 50/60 Unit Communication Address 0-15...
  • Page 67 ® COMMISSIONING SHEET OPTION DESCRIPTION VALUES ALLOWABLE VALUES Gas Pressure Select 0- Gas pressure input not used. The gas valve leak test is not performed and the gas pressure limit values are ignored. 1- NX1020 gas pressure sensor used. The unit Monitors the gas pressure (including gas pressure limits) if gas pro- file is selected but does not perform gas valve proving.
  • Page 68 COMMISSIONING SHEET OPTION DESCRIPTION VALUES ALLOWABLE VALUES Pilot Open 0- Pilot only operates without the main gas valve when fir- ing on gas. 1- Pilot operates with the main gas valve (#1) when firing on gas. Limit Modulation Range 0- No Limit (Expansion Module Only) 1- Limited Direct Ignition on Oil...
  • Page 69 ® COMMISSIONING SHEET OPTION DESCRIPTION VALUES ALLOWABLE VALUES Modulation Switch 0-99% Setpoint 1 Input Type 0- Track modulation input. (Where minimum input signal= low fire, Maximum input signal= high fire) 1- Measure value input, PID XXX control, values displayed with no decimal place 2- Measure value input, PID XX.X control, values displayed with 1 decimal place.
  • Page 70 COMMISSIONING SHEET OPTION DESCRIPTION VALUES ALLOWABLE VALUES Setpoint 2 Control Limit Type 0- No limits. 1- Absolute limit. The values entered in option parameters 9.1 and 9.2 are the actual limit values. 2- Deviation limit. The value entered is option parameters 9.1 and 9.2 represent a deviation from the setpoint 1 con- trol value.
  • Page 71 ® COMMISSIONING SHEET OPTION DESCRIPTION VALUES ALLOWABLE VALUES 10.3 I/P C Function Same as 10.1 10.4 I/P D Function Same as 10.1 10.5 I/P F Function Same as 10.1 10.6 I/P 2 Function Gas Select 0- Gas Selected 1- Auto/Manual selection 2- Manual Up 3- Manual Down 4- Setpoint select...
  • Page 72 COMMISSIONING SHEET OPTION DESCRIPTION VALUES ALLOWABLE VALUES 10.9 I/P 5 function 0- Air Pressure Switch 2 NO FLOW Pressure 1- Auto/Manual selection Switch 2 2- Manual Up Flow 3- Manual Down 4- Setpoint select 5- Release to ignite 6- Release to modulate. 7- Lead boiler select.
  • Page 73 14.8 Inverter speed stop time 0-100 seconds 20.0 Oxygen Probe select 0- No probe selected 1- Fireye Oxygen probe w/o pre-purge test. 2- Fireye Oxygen probe w/ pre-purge test 20.1 Oxygen probe calibration offset value 0-999 20.1 Oxygen probe calibration offset value 0-999 20.2...
  • Page 74 COMMISSIONING SHEET OPTION DESCRIPTION VALUES ALLOWABLE VALUES 20.5 Oxygen Input function 0- Monitor only 1- Closed loop trim 20.6 Oxygen probe calibrate enable 0- Not selected 1- Calibrate in air 2- Calibrate in reference gas 20.7 Boiler transport delay 5-60 seconds 20.8 Reset oxygen trim profile 0- No Reset...
  • Page 75 ® COMMISSIONING SHEET OPTION DESCRIPTION VALUES ALLOWABLE VALUES 27.0 Flue Temperature Alarm Select 0- Disabled 1- Enable 27.1 Flue Temperature Low Alarm Values for 0-999 Profile 1 27.2 Flue Temperature Low Alarm Values for 0-999 Profile 2 27.3 Flue Temperature Low Alarm Values for 0-999 Profile 3 27.4...
  • Page 76 COMMISSIONING SHEET OPTION DESCRIPTION VALUES ALLOWABLE VALUES 32.1 Oxygen High Alarm Values at High Fire for 0-99.9% Profile 1 32.2 Oxygen High Alarm Values at High Fire for 0-99.9% Profile 2 32.3 Oxygen High Alarm Values at High Fire for 0-99.9% Profile 3 32.4...
  • Page 77 ® COMMISSIONING SHEET OPTION DESCRIPTION VALUES ALLOWABLE VALUES 40.0 4-20 mA Input function AUX 1 0- Input not used. 1- XXX, Auxiliary input values displayed with no decimal place. 2- XX.X Auxiliary input values displayed with 1 decimal place. 3- X.XX Auxiliary input values displayed with 2 decimal places.
  • Page 78 Table 3: SAFETY TIME CONFIGURATION (OPTION 4.0) CONFIGURATION PROVE AIR SUPERVISE PRE- PILOT TRIAL PILOT MAIN WAIT FOR PRESSURE D PURGE IGNITION IGNITION TRAIL** FOR FLAME IGNITION INTERVAL IGNITION ESTABLISH 1(EP113) 37.5 3(EP113) 67.5 5*** 7(EP170) 8(EP160) 5*** 9**** 10**** * If an oil profile is selected, T4 will always be 5 seconds regardless of the time chosen.
  • Page 79 ® COMMISSIONING SHEET -GAS SELECT Profile 1 Fuel 1 (°) Air 1 (°) Air 2 (°) Profile 3 Fuel 1(°) Air 1 (°) Air 2(°) Close Close Purge Purge Ignition Ignition Low Fire Low Fire...
  • Page 80 COMMISSIONING SHEET - OIL SELECT Profile 2 Fuel 2(°) Air 1 (°) Air 2 (°) Profile 4 Fuel 2(°) Air 1 (°) Air 2(°) Close Close Purge Purge Ignition Ignition Low Fire Low Fire...

  • Page 81: Ordering Information

    ® ORDERING INFORMATION Main Components Part Number Description NX3000 EC approved Controller (3 channel) for up to 3 independent servo-motors (2 fuel, 1 air). Selectable purge, PTFI and MTFI timings. NX3100 UL, ULC approved Controller (3 channel) for up to 3 independent servo-motors (2 fuel, 1 air). Selectable purge, PTFI and MTFI timings.
  • Page 82 NXA-PS1000 Angled gas sampling tube (1000mm) for NX280PK for flues 1200mm to 4000mm. NXMBI “MODBUS” RTU interface, standard DIN rail mount. Networks up to 15 Fireye Nexus Systems. 7-35 VDC supply required. NXPBI “PROFIBUS” interface, standard DIN rail mount. Networks up to 15 Fireye Nexus Systems. 7-35...

  • Page 83: Wiring Base Layout

    ® WIRING BASE LAYOUT -NX1466/1386 Servo-Motor Supply (L1) I/P 1, 2, 3 common Fuel 1 up I/P 1 + fault/mute Fuel 1 down SUPPLY I/P 2 + gas FUSE Fuel 2 up I/P 3 + oil Fuel 2 down I/P 4, 5 flow common (Air pressure Damper 1 up sw 2) Damper 1 down...
  • Page 85 ®...
  • Page 86 Fireye warranty, as stated in its General Terms and Conditions of Sale, pertains only to the Fireye products and not to any other equipment or to the combined system or its overall performance.

This manual is also suitable for:

Nexus seriesNexus nx3100Nexus nx4000Nexus nx4100Nexus nx5100

Table of Contents