Midco LNB 2000 Installation And Service Instructions Manual

Low nox without chamber gas burners

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Installation and Service Instructions
WARNING: If the information in these instructions
is not followed exactly, a fi re or explosion may result,
causing property damage, personal injury or death.
In the United States, installation must conform with local codes
or in the absence of local codes, with the National Fuel Gas
Code, ANSI Z223.1-latest edition available from American
National Standard Institute. Further reference should be made
to the recommendation of your fuel supplier.
WARNING: Additions, changes, conversions and service
must be performed by an authorized Midco representative,
service agency or the fuel supplier. Use only MIDCO
specifi ed and approved parts.
INSTALLER: Inform and demonstrate to the user the correct
operation and maintenance of the gas utilization equipment.
Inform the user of the hazards of storing fl ammable liquids
and vapors in the vicinity of this gas utilization equipment
and remove such hazards. Affi x this manual and associated
literature to the burner or equipment.
CODE COMPLIANCE IS THE SOLE RESPONSIBILITY OF
THE INSTALLER.
USER: Retain this manual for future reference. If other than
routine service or maintenance as described in this manual
and associated literature is required, contact a qualifi ed service
agency. DO NOT ATTEMPT REPAIRS. An inadvertent service
error could result in a dangerous condition.
AVOID ERROR IN PARTS SELECTION. When ordering use
complete MIDCO Part Number and Description. Furnish Burner Model
Number, Bill of Material Number and Date Code (if available) from the
specifi cation plate found on the product
IMPORTANT: Availability of parts as well as specifi cations are subject
to change without notice. Please consult factory for item availability.
Midco® International Inc.
4140 West Victoria Street
Chicago, Illinois 60646
tel
866.705.0514
fax
866.580.8700
web
www.midcointernational.com
e-mail sales@midcointernational.com
MADE
in the
USA
LNB 2000
SAFETY INFORMATION TERMS: The following terms are used to identify hazards, safety precaution of special
notations and have standard meanings throughout this manual. They are printed in all capital letters using a bold
type face as shown below, and preceded by the exclamation mark symbol. When you see the safety alert symbol and
one of the safety information terms as shown below, be aware of the hazard potential.
DANGER:
WARNING:
CAUTION:
Quality Designed for Proven Performance
LNB 2000
Low NO x
Gas Burners
Do not store or use gasoline or other fl ammable vapors and liquids in
the vicinity of this or any other appliance.
Do not try to light any appliance.
Do not touch any electrical switch; do not use any
phone in your building.
Immediately phone your gas supplier from another
building. Follow the gas supplier's instructions. If
you cannot reach your gas supplier call the fi re
department.
Installation and service must be performed by a qualifi ed installer,
service agency or the gas supplier.
BURNER MODEL:
BILL OF MATERIAL
NUMBER:
SERIAL NUMBER #: ______________________________________
WIRING DIAGRAM: ______________________________________
Name:
_______________________________________________
Address: _______________________________________________
_______________________________________________
Phone:
_______________________________________________
Date of Installation: ______________________________________
Identifi es the most serious hazards which will result in severe personal injury or death.
Signifi es a hazard that could result in personal injury or death.
Identifi es unsafe practices which would result in minor personal injury or product and
property damage.
Without Chamber
WHAT TO DO IF YOU SMELL GAS:
______________________________________
______________________________________
FOR SERVICE CONTACT
419
8478 01
Printed in USA

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Summary of Contents for Midco LNB 2000

  • Page 1 Installation and service must be performed by a qualifi ed installer, must be performed by an authorized Midco representative, service agency or the gas supplier. service agency or the fuel supplier. Use only MIDCO specifi ed and approved parts. BURNER MODEL: ______________________________________ •...
  • Page 2: Part 1 - Installation

    Part 1 - Installation Specifi cations The LNB 2000 burner are adaptable to most ovens and after burners. The Midco LNB Series LOW NO x gas burners were developed to meet the changing emission requirements required today. LNB 2000 Low NOx burners without chamber...
  • Page 3 Part 1 - Installation When installing the Midco LNB burner all safety and operating controls must be included and connected Wiring so if any safety fails the LNB burner will not operate. Do not bypass any safety or operating control or equipment might be damaged.
  • Page 4 Part 1 - Installation The Midco LNB is provided with all required gas train assembly components. Refer to piping diagram Piping Figure 4a and 4b for a typical installation. Modifi cations can be made to the piping layout if required.
  • Page 5: Part 1 - Installation & Service

    5.00 PRESSURE DROP ACROSS VENTURI VBS-648, “W.C. Chart 1 - LNB 2000 - Natural Gas Flow Rate vs. Pressure Drop - (Venturi VBS - 648) __________________________________________ The LNB Series of burners need to be set correctly to maintain Low NOx emissions.
  • Page 6 IV Burner Startup Procedure for technicians to program Siemens module when using the Continued Ametek N8.9 blower on LNB 2000 burner Required Equipment: Siemens display unit # AZL23.00A9 SIEMENS (AZL23.00A9) - DISPLAY Power unit with ON/OFF switch in off position.
  • Page 7 Part 1 - Installation & Service IV Burner Startup Continued Siemens Control Lock Codes Chart 1 - Siemens Control - Lock Codes - Error Code List 8478-01 MADE in the Midco International Inc.
  • Page 8: Part 1 - Installation, Service

    Part 1 - Installation, Service IV Burner Startup Continued Siemens Control Flame Current ( Chart 1 ) Chart 2 - Siemens Control - Display of Flame Current 8478-01 MADE in the Midco International Inc.
  • Page 9 Part 1 - Installation & Service IV Burner Startup Continued Siemens Control Sequence of Operation Chart 3 - Siemens Control - Sequence of Operation __________________________________________ 8478-01 MADE in the Midco International Inc.
  • Page 10: Part 2 - Maintenance

    Ratio Regulator Zero Governor valve and blower. Loosen the four (4) ½″ bolts attaching the burner to the heater. This will allow removal of the Midco LNB burner. Visually inspect the burner head If any issue are found contact Midco for replacement. The fl ame sensor and spark rod can be removed by loosening two nuts holding the ignition and fl...
  • Page 11 Installation and service must be performed by a qualifi ed installer, must be performed by an authorized Midco representative, service agency or the gas supplier. service agency or the fuel supplier. Use only MIDCO specifi ed and approved parts. BURNER MODEL: ______________________________________ •...
  • Page 12 Specifi cations The LNB Series burners are adaptable to most makeup air units, ovens and after burners. The Midco LNB Series LOW NO x Series gas burner was developed to meet the changing emission requirements required today. LNB With Chamber...
  • Page 13 __________________________________________ Wiring The Midco LNB wiring is included with the burner. Follow wiring diagram included with the burner for proper wiring connections. When installing the Midco LNB burner all safety and operating controls must be included and connected so if any safety fails the LNB burner will not operate. Do not bypass any safety or operating control or equipment might be damaged.
  • Page 14 MAIN VALVE (NC) P24 - Fan motor on, Actuator LEGEND opens in high-fire JUMPER SOLID WIRING AND COMPONENTS BY MIDCO P30 - Prepurging WIRNG AND COMPONENTS BY OTHERS R/BK SUPPLIED BY MIDCO, INSTALL BY OTHERS P36 - Actuator closes to...
  • Page 15 Part 1 - Installation Wiring Continued Siemens, Control Lock Codes Chart 1 - Siemens Control - Lock Codes - Error Code List 8471 91 Midco International Inc. MADE in the...
  • Page 16 Part 1 - Installation Wiring Continued Siemens, Control Display of Flame Current Chart 2 - Siemens Control - Display of Flame Current 8471 91 MADE in the Midco International Inc.
  • Page 17 Part 1 - Installation Wiring Continued Siemens, Control Sequence of Operation Chart 3 - Siemens Control - Sequence of Operation __________________________________________ 8471 91 MADE in the Midco International Inc.
  • Page 18 Part 1 - Installation The Midco LNB is provided with all required gas train assembly components. Refer to piping diagram Piping Figure 4A and 4B for a typical installation. Modifi cations can be made to the piping layout if required.
  • Page 19 Figure 4B - Piping - LNB 1000 - Standard LNB 500 FIRING RATE vs PRES SURE DIFFERENCE ACROSS TWO SOLENOID VALVE PRESSURE DIFFERENCE ACROSS TWO SOLENOIDS, “ W.C. Chart 2 - Gas Pressure - LNB 500 __________________________________________ 8471 91 MADE in the Midco International Inc.
  • Page 20: Burner Startup

    Turn off power to MUA. Reinstall DC Volt signal to SCEBM-1 control board. Turn on power to MUA. Set temperature control 70 degrees over booth temperature. Burner lights and ramps up to high fi re. 8471 91 MADE in the Midco International Inc.
  • Page 21: Burner Setup

    DC Volt signal being generated from the temperature control. __________________________________________ The Midco LNB burner comes with a limiting gas orifi ce which is required to maintain the Low NOx Burner Setup readings and fi ring rate. The orifi ce is located between the Ratio Regulator Zero Governor valve and EBM blower inlet.
  • Page 22 Regulator Zero Governor valve and blower. Loosen the four (4) ½″ bolts attaching the burner to the heater. This will allow removal of the Midco LNB burner. Inspect the heat chamber. To inspect the burner head look into the heat chamber if any issue are found contact Midco for replacement. The fl...
  • Page 23: Ignitor Assembly

    Part 2 - Maintenance The Midco LNB burner uses a direct spark ignition. The LNB direct spark ignition is factory set. The VIII Direct Spark spark gap should be set at 5/32″ from center ground rod. Inspect porcelain on the fl ame rod and Ignitor Assembly spark rod.
  • Page 24: Service Bulletin

    Covering Specs and Gas Type AVOID ERROR IN PARTS SELECTION. When ordering use complete MIDCO Part Number and Description. Furnish Burner Model Number, Bill of Material Number and Serial Number (if available) from the specifi cation plate found on the product.
  • Page 25 Figure 2 - Kit Label Placement -Covering Specs and Gas Type AVOID ERROR IN PARTS SELECTION. When ordering use complete MIDCO Part Number and Description. Furnish Burner Model Number, Bill of Material Number and Serial Number (if available) from the specifi cation plate found on the product.
  • Page 26: Replacement Parts

    Premixing the fuel and air before ignition assures complete combustion with minimal levels of CO and NOx. AVOID ERROR IN PARTS SELECTION. When ordering use complete MIDCO Part Number and Description. Furnish Burner Model Number, Bill of Material Number and Serial Number (if available) ®...
  • Page 27 Exploded View - Low NOx Burner - LNB2000 LNB 2000 Without Chamber (Standard) LNB 2000 Without Chamber NFPA ValveTrain 8473 02 Midco Inc. International...
  • Page 28 Low NOx - LNB2000 - Burner Parts List Item Part # Description 5250-16 Burner Mounting Flange Weldment LNB 2000 5250-09 Burner Head Gasket LNB 2000 5250-13 Burner Head Weldment LNB 2000 5247-39 Gasket Thermal Switch 8425-58 Thermal Switch (SPDT) 160-130...
  • Page 29 Ring Terminal Adaptor Boot Terminal Adaptor AVOID ERROR IN PARTS SELECTION. When ordering use complete MIDCO Part Number and Description. Furnish Burner Model Number, Bill of Material Number and Serial Number (if available) from the specifi cation plate found on the product.
  • Page 30 AVOID ERROR IN PARTS SELECTION. When ordering use complete MIDCO Part Number and Description. Furnish Burner Model Number, Bill of Material Number and Serial Number (if available) from the specifi cation plate found on the product.
  • Page 31 9/16” I.D. Electrod Bushing (Inside Collar) AVOID ERROR IN PARTS SELECTION. When ordering use complete MIDCO Part Number and Description. Furnish Burner Model Number, Bill of Material Number and Serial Number (if available) from the specifi cation plate found on the product.

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