Miura LX Series Installation & Operation Manual
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Miura LX Series Installation & Operation Manual

Miura LX Series Installation & Operation Manual

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Revised 09/04/07

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Summary of Contents for Miura LX Series

  • Page 1 Revised 09/04/07...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SECTION 1 Introduction ___________________________________________________ 1 Definitions and Symbols _____________________________________________________ 1 Guarantee_________________________________________________________________ 1 Introduction _______________________________________________________________ 1 Features __________________________________________________________________ 2 Description ________________________________________________________________ 4 Specifications ______________________________________________________________ 7 SECTION 2 Acts & Regulations______________________________________________ 7 Acts & Regulations _________________________________________________________ 9 National Regulatory Organizations ___________________________________________ 10 SECTION 3 Installation ___________________________________________________ 12 Unloading ________________________________________________________________ 12...

  • Page 3: Definitions And Symbols

    Damage to the boiler or parts of the boiler after leaving the factory are not covered. Parts replaced under this warranty must be returned to MIURA. If the failed part is not returned, the customer will be charged for the new item.

  • Page 4: Features

    The MIURA BOILER is a once through, forced flow, low water content, water tube design, which provides full output within 5 minutes. Miura Boiler is designed to run with a minimum amount of maintenance with simple, push-button controls. With the patented Miura XJ1 computer controller, Miura can monitor detail boiler operation from our offices and provide fast, accurate data.
  • Page 5 MIURA XJ1 Microprocessor Boiler Control with friendly digital display • Communication interface capability • Display of hours of operation and record of five most recent faults • Remote monitoring of boiler performance and troubleshooting by modem link with Miura factory is available Page 3...

  • Page 6: Description

    "fixed water level”. This is not true however for the Miura steam boiler because of the low water content and the fierce boiling action of the steam gradient. This dynamic system is controlled only by a special modification of the water column to create an artificial level.
  • Page 7 The Miura Steam boiler design has been used for more than forty years with over 200,000 units presently in operation worldwide. There is no record of ANY pressure vessel explosion.
  • Page 8 LX BOILER SECTION VIEW Page 6...

  • Page 9: Specifications

    PECIFICATIONS LX-300 1.6.1 PECIFICATIONS FOR ITEM UNITS LX-300 SG Boiler Type Multiple water tube, once through, forced flow, steam boiler Boiler Horsepower Rating Maximum Pressure PSIG (Kg/cm²) 170 (11.95) design Equivalent Output Lb/Hr (Kg/Hr) 10,350 (4,694) Heat Output 10,050,000 (2,531,000) Btu/Hr (KCal/Hr) Heat Input...
  • Page 10 LXH-300 (S 1.6.2 PECIFICATIONS FOR PECIAL ITEM UNITS LXH-300 SG Boiler Type Multiple water tube, once through, forced flow, steam boiler Boiler Horsepower Rating Maximum Pressure PSIG (Kg/cm²) 300 (21.1) design Equivalent Output Lb/Hr (Kg/Hr) 10,000 (4,537) Heat Output 9,708,000 (2,446,000) Btu/Hr (KCal/Hr) Heat Input...

  • Page 11: Section 2 Acts & Regulations

    Authorities having jurisdiction should be consulted before installations are made. For more information on how the various rules affect boiler selection and operation, you may want to contact your local MIURA authorized representative or the engineering firm designing the boiler installation. Here are some essential rules to consider: a) The boiler industry is tightly regulated by the American Society of Mechanical Engineers (ASME) and ASME Codes, which controls boiler design, inspection, and quality assurance.

  • Page 12: National Regulatory Organizations

    EGULATORY RGANIZATIONS MIURA Boiler recommends contacting your actual insurance provider as well as the utility companies for assistance in identifying and complying with codes and regulations. A partial list of agencies having jurisdiction over boiler installation and operation is given below.

  • Page 13: General Flow Chart

    GENERAL FLOW CHART Page 11...

  • Page 14: Section 3 Installation

    MIURA Boiler makes reasonable effort to ensure that no vibration or shock damage will occur. However, if such damage occurs and is not discovered and noted at the time of delivery, MIURA Boiler is not responsible to pay for the cost of repairs and any damaged parts will not be under warranty.

  • Page 15: Assembling

    NPT thread pipe. Ask MIURA representative for detailed information. The LX series boiler may be unloaded from the transport truck using a forklift. However, if a forklift is used, precautions should be taken to ensure that the boiler does not tip over. The boiler is top heavy and the weight is not centered.
  • Page 16 The pump contactor and circuit protection provided in the control box are to be used only with feedwater pump recommended by MIURA at rated voltage and HP stamping on boiler nameplate. If different pump is used, 4 HOLES Ø ½”...

  • Page 17: Steam & Water Piping

    • Please Contact your nearest MIURA representative or Distributor about accessories. • Before boiler is fired for the first time after installation is completed, flush all piping. MIURA is not responsible for damage as a result of debris in piping such as stuck open check valve.
  • Page 18 3.3.1 S TEAM PIPING • MIURA Boiler recommends a check valve between the boiler outlet valve and the header isolation valve. Install the main steam check valve horizontally to prevent condensate build up above the check valve. • Even though MIURA Boiler provides very dry steam, proper insulation and drainage of condensate from steam lines is still required in order to obtain dry steam at the point of use.
  • Page 19 • Install the Feed water pump under or near the Feed water tank. The suction pipe should be adequately sized and configured to minimize friction losses. MIURA requires at least 7.5 feet of water above the suction of the pump to prevent cavitation. Avoid high points in the pump suction piping that would allow air to collect and result in loss of pump priming.
  • Page 20 • Some jurisdictions require a pressure gauge on the discharge of the pump. • Chemical feed can be made to feed tank and/or feed water line. All MIURA Boilers are provided with a set of “DRY” contact terminals which are connected to the Normally Open contact on the feed water pump magnetic contact.
  • Page 21 MIURA Boilers start the feed pump on call for water and then turn it off when call for water stops. This is due in part to the boiler having no fixed steam/water level to maintain and in part, due to a side benefit of the pressure vessel design. Most other boilermakers require operating the pump continuously using a modulating feed water control system such as McDonnell Miller float valves.
  • Page 22 Pump flange kits are available from MIURA as an option. Also, install an isolation valve on the supply side of the strainer to allow cleaning the strainer without draining the feed water supply tank. The Suction side isolation valve and feed water strainer are NOT provided by MIURA, but must be installed in order to include the pump in the One-Year parts Warranty.

  • Page 23: Blowdown Piping

    lifts, any rainwater or valve leakage should be drained off and not allowed to stagnate. Failure to drain the water may result in valve corrosion or water hammer if the valve lifts. The optional economizer may be equipped from the factory with a safety valve.
  • Page 24 All piping subject to pressure from the boiler during blowdown must be securely anchored to prevent piping vibration and shock during blowdown of the boiler. Due to the large number of different piping arrangements possible, MIURA recommends a maximum pressure for manual bottom blowdown of 30 PSI.

  • Page 25: Fuel Piping

    0.2 PSIG but NEVER below 3 PSIG during operation. This pressure must be at the regulator supplied with MIURA Boiler gas piping. If necessary, use larger pipe for long piping runs. Failure to maintain required gas flow rate pressure will...
  • Page 26 The utility gas regulator must maintain at least 3 PSIG and not exceed 5 PSIG under these conditions, and is to be installed as far away from the boiler regulator as possible. The maximum pressure of 5 PSIG is determined by UL and CSA approval of the MIURA standard gas train. Consult gas company for details.
  • Page 27 Automatic Vent Switch if required Valve MIURA provided Gas Train Install dirt pocket on Main gas inlet piping immediately up stream of boiler. Two pressure switches, HIGH and LOW gas pressure, may be required to be vented to the atmosphere outside of To out doors the boiler room.

  • Page 28: Clearances & Ventilation

    An optional solenoid automatic vent valve located between the main gas blocking valves may be required for insurance purposes and is an additional cost option to meet IRI specifications. Ensure IRI is specified on the purchase order if necessary. Follow all local regulations. &...

  • Page 29: Stacks And Breeching Installation

    (i.e. for four boilers; all boilers at high-fire or only one boiler at low-fire). Failure to maintain this value will adversely affect boiler performance and is not the responsibility of MIURA. Each boiler should be equipped with a single stack. If this is not possible, Barometric dampers or equivalent are required to prevent exceeding maximum draft on the boiler.
  • Page 30 Ensure these connections are piped to drains. Please do not cover these fittings when insulating the exhaust stack. One, ½” drain plug fitting is installed on the optional MIURA flue elbow and one, 2” drain coupling is provided on the optional economizer. The 2” drain coupling is intended to allow piping of condensation to a floor drain through a “J”...

  • Page 31: Electrical Installation

    Natural Gas combustion. : The LX Boilers can meet current SCAQMD codes if required by purchase order. LECTRICAL NSTALLATION : MIURA recommends that an Alarm or Caution light be installed in the control room if possible. Page 29...
  • Page 32 Check rotation direction of blower, feedwater pump, and oil pump. • Comply with local building electrical codes. : MIURA boiler is supplied with a motor controller for the boiler feed water AUTION pump. The optional feed water pump should be powered from the boiler. If the pumps and motor controller were supplied with the de-aerator or hotwell tank, use the two terminals identified on wiring diagram as the remote ON-OFF switch for the pump.
  • Page 33 Terminal Strip 33W1 LX/LXL-50/100 Power Box 7800 33WL2 T1 | T2| T3| X1| |X3|X4|X5|... CB4 CB2 LX/LXL-50/100 Boiler Control Box Layout LX/LXL-150/200,300 Junction Box LX-300SG units (typical) Power Source Power Source Power Box LX and LXL models under Power Box 300 BHP (typical) Feed Water Pump...

  • Page 34: Section 4 Operation

    MIURA dealer. • Daily water analysis should be performed to see if additional treatment is needed. Use a tester of 1 PPM or less sensitivity. : See MIURA XJ1 manual for detailed operation of the control panel. REPARATION EFORE Check the following everyday before boiler start-up: a) Make sure all gauges are operating correctly.

  • Page 35: Blowdown And Blow-Off

    Since the number of full blowoff is dependent upon running hours and water quality in your area, please follow the advice of the nearest MIURA distributor or water treatment representative.

  • Page 36: Shutdown

    Continue the blowdown until the boiler is completely dry. This will ensure all sludge is removed. Complete draining of the MIURA boiler is not dangerous to the boiler. Once blowoff is complete, close the blowoff valves, open the feed water valve and repeat start-up routine in Section 4.2.
  • Page 37 Proper balance of gas and airflow is needed to assure complete combustion and optimum efficiency. Adjust the airflow as needed. MIURA recommends a combustion tune up every three to four months to maintain optimum efficiency due to air temperature and humidity changes every season.

  • Page 38: Safety Attachments

    AFETY TTACHMENTS 4.6.1 L ATER OLUME If the water volume, for any reason, falls below the pre-determined water volume, combustion will immediately be stopped; a warning alarm will be activated. The display will read, “ALARM” and “LOW WATER LEVEL”. After complete blowdown of the boiler, all the red lights on the floatless switches will be off. With the main power turned on at the boiler and the "OPERATION ON/OFF"...
  • Page 39 : Should the high temperature alarm ever be activated, immediately contact your AUTION nearest authorized MIURA representative and chemical company. DO NOT restart the boiler or change the setting without written authorization or pressure vessel may be severely damaged.
  • Page 40 Release the reset button, set overload protector #88F back to manual and reset the boiler. : MIURA recommends installing optional air filter box to prevent the burner from dust. Page 38...

  • Page 41: Water Treatment

    : Check with your water treatment representative for details. AUTION : Miura Boiler Co., Ltd. cannot be responsible for any problems encountered with the boiler due to unsuitable water treatment. Please contact a reliable water treatment company and follow their directions.
  • Page 42 MIURA has no warranties to cover damage due to poor water treatment and failure to maintain these specifications listed below. MIURA MAKE-UP WATER MAINTENANCE CHECK In order to keep your LX Series running in top condition, be sure to check the following daily: a) C HEMICAL i.
  • Page 43 “CAUTION – CHECK SOFTENER” whenever MIURA Colormetry CMU-124H detects hardness. : MIURA controls the water volume of boiler by conductivity. Special care is required for conductivity of make up water that is less than 50 µS/cm. Contact MIURA for details. Page 41...

  • Page 44: Maintenance

    SECTION 5 MAINTENANCE & I AINTENANCE NSPECTION CHEDULE In order to maintain the high efficiency and to prevent costly breakdowns of your LX Series, perform the following maintenance and cleaning: EVERY EVERY MAINTENANCE ITEMS CHECK POINTS REMARKS NEEDED MONTH Make-up Water...

  • Page 45: Type Of Service

    Fit a compatible battery into the holder and replace the panel cover. PARE PARTS After the end of the parts warranty, it is not necessary to order replacement parts from MIURA. One of our design advantages is the use of non-proprietary parts.
  • Page 46 LX-300 WITH LX-300 W/O LXH-300 WITH PART NAME PART NUMBER OR W/O MI Damper coupling Lovejoy 5/8” x 7/16” rubber assembly L070 Honeywell 2 Flame eye C7035A1031 26A1BO-03 3 Floatless switch 16B1A0-00-10 4 Relay LY-2, CSA, 120V Magnetic CA7-85-19-120 208 V 208 V 208 V contactor for...

  • Page 47: Troubleshooting

    ROUBLESHOOTING PROBLEM ITEM TO CHECK CAUSE REMEDY light a) Main power switch on? Turn main power breaker "OPERATION" switch. b) Main power fuse tripped? Short circuiting Locate cause short circuit, repair and replace fuse c) Circuit breaker broken OR Replace circuit breaker OR wires loose? tighten terminal wires 2.
  • Page 48 Replace, reset, OR tighten but no ignition. OR loose wiring terminal contacts b) Check blower rotation Reversed rotation Reverse wire c) Check spark rod Faulty Replace d) Check flame safeguard Faulty Replace * ALWAYS contact your nearest MIURA representative. Page 46...

  • Page 49: Flow Chart Of Lx(L) Sequence Operation

    LX(L) S LOW CHART OF EQUENCE PERATION Page 47...
  • Page 50 DISTRIBUTOR INFORMATION NAME ADDRESS TELEPHONE DATE OF INSTALLATION BOILER MODEL MIURA BOILER OFFICES WWW.MIURABOILER.COM ATLANTA: CHICAGO: 1900 THE EXCHANGE SE, SUITE 330 600 NORTHGATE PARKWAY, UNIT M ATLANTA, GA WHEELING, ILLINOIS 30339-2022 60090-3201 PHONE: (770) 916-1695 PHONE: (847) 465-0001 FAX: (770) 916-1858 FAX: (847) 465-0011 ATLANTA@MIURABOILER.COM...

This manual is also suitable for:

Lxl seriesLx-300 sgLxh-300 sgLx-300Lxh-300

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