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APPLICATION
The Honeywell CR7890B Integrated Burner Control is a
microprocessor-based control for automatically fired gas, oil,
or combination fuel single burner applications. The CR7890B
Integrated Burner Control consists of a self contained relay
module, amplifier and a shutter type solid state Ultraviolet
Detector for sensing the ultraviolet radiation generated by the
combustion of gas, oil, or other fuels. Options include the
S7800 Keyboard Display Module (KDM), for use during burner
setup or troubleshooting.
Functions the CR7890B provides include automatic burner
sequencing, flame supervision, system status indication,
system or self-diagnostics and troubleshooting.
This document provides installation and static checkout
instructions. One other applicable publication is form 65-0090:
S7800A Keyboard Display Module Product Data.
® U.S. Registered Trademark
Copyright © 2003 Honeywell International Inc.
All Rights Reserved
Integrated Burner Control
FEATURES
• Oscillating shutter interrupts ultraviolet radiation
reaching the UV sensor to provide the UV sensor
checking function. Amplifier circuitry components are
checked from the microprocessor in the CR7890B
Control.
• Device can be mounted horizontally, vertically or at
any other angle. The device has faceplate alignment
and integral locating reference points to assure proper
shutter mechanism operation.
• Quartz viewing window is field replaceable.
• CR7890B1019 uses Brad Harrison® 3R9006A20A120
connector.
•
A swivel mount is available to facilitate flame sighting.
•
-40°F (-40°C) rated ultraviolet sensing tube.
• High pressure 50 psi (345 kPa) quartz viewing window,
magnifying lens and antivibration mount are available
as accessories.
• Housing meets NEMA 4 enclosure standards. (NEMA 1
when access cover is used.)
• Protective heat block built into mounting flange.
• Power LED blinks a fault code when device is in
ALARM state.
• Optional Keyboard Display Module (KDM) provides
additional troubleshooting and diagnostic information.
Application ........................................................................
Features ...........................................................................
Specifications ...................................................................
Ordering Information ........................................................
Installation ........................................................................
Static Checkout ................................................................ 10
Principal Technical Features ............................................ 11
Operation .......................................................................... 11
Adjustments and Checkout .............................................. 12
Service ............................................................................. 13
Troubleshooting ................................................................ 13
CR7890B
7800 SERIES
PRODUCT DATA
65-0259-1
Contents
1
1
2
2
3
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Summary of Contents for Honeywell 7800 Series
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Page 1: Table Of Contents
• High pressure 50 psi (345 kPa) quartz viewing window, APPLICATION magnifying lens and antivibration mount are available as accessories. The Honeywell CR7890B Integrated Burner Control is a • Housing meets NEMA 4 enclosure standards. (NEMA 1 microprocessor-based control for automatically fired gas, oil, when access cover is used.) or combination fuel single burner applications. -
Page 2: Ordering Information
If you have additional questions, need further information, or would like to comment on our products or services, please write or phone: 1. Your local Honeywell Automation and Control Products Sales Office (check white pages of your phone directory). 2. Honeywell Customer Care... -
Page 3: Installation
CR7890B 7800 SERIES INTEGRATED BURNER CONTROL Weight: WARNING CR7890B1019: 3.78 lb (1.71 kg). Electrical Shock Hazard. Replacement Parts: Can cause serious injury or death. All Models: 1. Disconnect power supply before beginning 114372 Quartz Viewing Window; rated for 20 psi (138 kPa). - Page 4 CR7890B 7800 SERIES INTEGRATED BURNER CONTROL Basic Requirements Radiation Sources (Other Than Flame) The combustion flames of most carbon-based fuels emit Examples of sources (other than flame) that could actuate the sufficient ultraviolet radiation to enable the CR7890B detection system: Integrated Burner Control to prove the presence of a flame in a combustion chamber.
- Page 5 CR7890B 7800 SERIES INTEGRATED BURNER CONTROL Sight pipes with diameters 2 to 3 in. (51 to 76 mm) produce better results for horizontal rotary burners, which require wide DETECTOR IN GOOD viewing angles. A wide viewing angle can also be obtained by...
- Page 6 CR7890B 7800 SERIES INTEGRATED BURNER CONTROL Sight Pipe Ventilation It may be necessary to ventilate the sight pipe to cool the CR7890 CAN BE MOUNTED HORIZONTALLY, VERTICALLY, OR CR7890 or to clear a viewing path through UV radiation AT ANY ANGLE IN BETWEEN attenuating material.
- Page 7 CR7890B 7800 SERIES INTEGRATED BURNER CONTROL Wiring 120934 (3/4 INCH NPT) NOTCH IN FACEPLATE FRONT SECTION OF BACK SECTION OF MOUNTING FLANGE WARNING MOUNTING FLANGE FACEPLATE Electrical Shock Hazard. SCREW ONTO CAPTIVE COVER SCREW (4) Can cause serious injury, death or property SIGHT PIPE damage.
- Page 8 CR7890B 7800 SERIES INTEGRATED BURNER CONTROL Table 3. Terminal Ratings. Terminal Number Description Ratings — Earth Ground Line Voltage Common — Line Voltage Supply (L1) 120 Vac (+10%/-15%), 50 or 60 Hz (±10%). Alarm 120 Vac, 1A pilot duty. Reset 120 Vac, 10 mA maximum.
- Page 9 CR7890B 7800 SERIES INTEGRATED BURNER CONTROL 32007181-001 CR 7890B INTERCONNECT CABLE WITH BRAD HARRISON® 9-PIN CONNECTORS RED/BLACK LINE VOLTAGE 32007181-001 32007181-001 ALARM INTERCONNECT INTERCONNECT CABLE CABLE ORANGE BURNER CONTROLLER/LIMITS WHITE/BLACK PIN-OUT AND WIRE COLOR: INTERMITTENT 1 - ORANGE 6 - RED...
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Page 10: Static Checkout
CR7890B 7800 SERIES INTEGRATED BURNER CONTROL Table 5. Composition of Each Combination. 4.5A ignition 50 VA Pilot Duty plus 180 VA ignition plus 2A Pilot Duty 65 VA Pilot Duty plus 4.5A ignition. motor valves with: motor valves with: 660 VA inrush,... -
Page 11: Principal Technical Features
CR7890B 7800 SERIES INTEGRATED BURNER CONTROL Table 6. Static Checkout. Test If Operation is Abnormal, Check the Items Test No. Jumpers Voltmeter Normal Operation Listed Below — 9 to 5 Line voltage. 1. Master switch. 2. Power connected to the master switch. -
Page 12: Adjustments And Checkout
CR7890B 7800 SERIES INTEGRATED BURNER CONTROL not met, a hold condition is initiated and is displayed on the 1. Remove the four black faceplate screws (Fig. 5) from optional KDM for at least five seconds. When the tolerances the faceplate. -
Page 13: Service
CR7890 to eliminate or reduce the CR7890 response to reflected For 7800 SERIES controls, a voltohmmeter with an input UV radiation. It may be necessary to construct a barrier impedance of one megohm/volt and a zero-to-five or to block the ignition spark from the CR7890 view. - Page 14 CR7890B 7800 SERIES INTEGRATED BURNER CONTROL Procedure for Zero Meter Reading Fault Codes If you cannot obtain a meter reading, replace the CR7890. In addition to the above checks, the CR7890B POWER LED provides fault identification when the CR7890B locks out on IMPORTANT an alarm.
- Page 15 65-0259—1...
- Page 16 CR7890B 7800 SERIES INTEGRATED BURNER CONTROL Automation and Control Solutions Honeywell International Honeywell Europe S.A. Honeywell Latin American Region Honeywell International Inc. Honeywell Limited-Honeywell Limitée Control Products 3 Avenue du Bourget 1985 Douglas Drive North 35 Dynamic Drive Honeywell Building...
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