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Summary of Contents for Miura EX Series
- Page 1 EX BOILER START UP MANUAL MIURA CANADA Co.,LTD MIURA MANUFACTURING AMERICA Co.,LTD Date of issue : Mar. 20, 2013 Boiler Start up Manual Number : T539-998-9022...
- Page 2 REQUIRED TOOLS & MEASURING DEVICES...
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Page 3: Measuring Devices
Tools A set of standard tools Measuring Devices Manometer (for measurement of orifice differential pressure and combustion-chamber pressure) Multimeter (with temperature measurement functionality) O meter Smoke tester CO meter and detecting tube Megaohmmeter (Insulation Tester or Meggar) ... -
Page 4: Trial Operation Procedure
TRIAL OPERATION PROCEDURE... - Page 5 Boiler Installation Inspection Confirm that feed water piping is suitable for your application. You must be able to easily bleed air from the piping and you must be able to drain water from the boiler in order to prevent freezing. The diameter of the piping must be sufficiently large to ensure cavitation does not occur.
- Page 6 Inspecting the Boiler Unit Inspecting the interior of the boiler shell Open the upper and lower inspection holes and visually inspect the inside of the boiler shell (for corrosion, pitting, and the like) using an inspection lamp and a work light. Wrench Wind box UPPER HEADER...
- Page 7 Inspecting the safety valve Confirm that the safety valve’s steam discharge outlet is directed toward a safe area for discharge. Take the appropriate action if this is not the case. Inspecting the feed water system Disassemble and clean the Y-type strainer’s filter. Inspect the probes in boiler.
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Page 8: Preparing For Operation
Preparing for Operation Power supply lines Confirm that power supply lines for each terminal strip (i.e., within the control panel, motor terminal box, etc.) are securely fastened by manually pulling each terminal line. Tighten if any looseness is confirmed. Measure the inter-terminal and ground-to-terminal voltages within the main power breaker. After confirming that the boiler switch is in the off position, turn on the power supply. - Page 9 Bleeding air from the feed water system Fill the feed water tank with water. Open the feed-water supply valve and bleed air completely from the air-bleed ports located on the top of the pump. Use the following method if air cannot easily be bled from the system. Open the feed-water valve, located downstream of the pump, slightly from the fully closed position, and also open the air-bleed port.
- Page 10 Checking for gas leaks i) Leaks from piping Inspect the connection points of all piping to confirm there is no leakage. Close the main gas valve and the pilot gas valve. Open the gas supply valve, apply gas pressure, and after taking a reading from the gas pressure gage, close the gas supply valve.
- Page 11 Checking for Gas Leaks Using a Measuring Cylinder Close the manual main gas valve and the manual pilot gas valve. Remove the plug from between the shutoff valves and install an inspection nipple. (See the previous page for the pressure inspection point.) Connect a plastic hose to the inspection nipple, and as shown in the figure below, place the other end of the hose under a graduated cylinder that has been filled with water in a bucket or container.
- Page 12 ADJUSTMENT...
- Page 13 Precautions If multiple installation control (MI Control) is to be carried out, set the boilers to manual combustion- adjustment mode and optimize boiler combustion conditions. Note) Boilers that have been set to manual combustion-adjustment mode will be controlled at the corresponding steam pressure settings.
- Page 14 BL11 Controller Setting Procedure Normal Display: “SW1” set to “OFF” Condition monitor: Basic screen Steam Pressure Exhaust Gas Temperature H I G H F I R E Feed Water Temperature S T E A M 7 0 P S I Scale Monitor Temperature Overheat Thermostat Temperature ···...
- Page 15 Maintenance Setting Screen: “SW1” set to “ON” Maintenance mode Select “YES” for combustion adjustment A beeping alarm will sound when “YES” M A I N T E N A N C E M O D E is selected, and “M” will be displayed on- Y E S screen.
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Page 16: Adjustment Flowchart
Adjustment Flowchart * Adjustment Flowchart: Oil-fired combustion adjustment is to be carried out after the completion of gas- fired combustion adjustment. Gas-fired Combustion Adjustment PROVISIONAL AIRFLOW SETTING Pilot hold PILOT AIR PILOT GAS PROVISIONAL DIFFERENTIAL PRESSURE SETTING IGNITION HIGH-FIRE (AIRFLOW) FLOW-RATE ADJUSTMENT FOR HIGH-FIRE GAS ADJUSTMENT MEASUREMENT... -
Page 17: Oil Pressure Adjustment
Oil-fired Combustion Adjustment “OPERATION” SWITCH: OFF FUEL SELECTOR SWITCH: OIL-FIRED IGNITION Automatic TRANSITION TO HIGH FIRE OIL PRESSURE ADJUSTMENT MEASUREMENT WITHIN RATED RANGE SMOKE LEVEL MEASUREMENT WITHIN RATED Low-fire hold TRANSITION TO LOW FIRE MEASUREMENT WITHIN RATED RANGE SMOKE LEVEL MEASUREMENT WITHIN RATED NO MISFIRE... - Page 18 Gas Flow-Rate Adjustment Method As the boiler is tested at the factory prior to shipment, no significant adjustment is required in terms of combustion. However, the basic procedure for adjustment of the combustion is as follows. Move the combustion switch to “ON” and set the boiler to high fire operation. Check the gas regulator pressure (for high fire).
- Page 19 Regulator adjustment method Adjust the regulator to correct any significant deviation of the gas regulator pressure and orifice differential pressure from the corresponding entries in the list of adjustment values. Increase gas flow Measurement of gas flow rate during low fire operation After adjusting the gas flow rate and exhaust-gas O level during high fire operation, switch to low fire operation, adjust the exhaust-gas O...
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Page 20: Gas Flow Rates
Gas Flow Rates Standard-condition conversion for gas flow rates 519.7 14.7 pressure (PSI) Standard condition flow rate (SCFH) Flow rate reading (CFH) 459.7 temperatur 14.7 Adjustment Standards for Gas Flow Rates The adjustment of flow rates should be carried out in accordance with the following priority sequence. Adjustment using a gas flow meter ... - Page 21 Combustion Adjustment Method (oil-fired) Oil-fired combustion adjustment is to be carried out after the completion of gas-fired combustion adjustment. Note) As combustion adjustment is carried out under gas-fired conditions, do not adjust the airflow (i.e., the degree of damper opening). Combustion Adjustment Method Where necessary, set “MAINTENANCE MODE”...
- Page 22 Inspection & Checking of Safety Devices First tighten all connections and confirm that none are loose. (Wind box, terminal strips, plug caps, steel pipe joints, etc.) Burner system Inspect the pilot-burner mounting and UV sensor. Adjust any abnormalities that are identified. Feed water system (i) Confirm that water-level control conditions are normal.
- Page 23 3.10 Post-Adjustment Measurements After combustion adjustment has been completed, check the system once again in order to determine the final values. Perform display-based measurement MONITOR ITEM UNITS MEASUREMENT TIMING Upon measurement of scale monitor and overheat thermostat Steam Pressure temperatures F Exhaust Gas Temperature After three minutes in steady low-fire and high-fire condition...
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Page 24: Final Check
Exhaust gas analysis, etc. % (during low-fire and high-fire operation) CO concentration (during low-fire and high-fire operation) Combustion-chamber pressure (upon purge, and during low-fire and high-fire operation) Wind-box pressure Main valve gage reading Main gas differential pressure Degree of damper opening (upon ignition, and during low-fire and high-fire operation) Other measurements Pre-purge and post-purge duration Power supply voltage... -
Page 25: Flow Chart
FLOW CHART...
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