Related Manuals for Miura LX Series
Summary of Contents for Miura LX Series
- Page 1 STEAM BOILER INSPECTION MANUAL MIURA BOILER Co.,LTD MIURA MANUFACTURING AMERICA Co.,LTD Boiler Inspection Manual Number : T519-998-9031 Date of issue : Sep. 15, 2009...
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Page 2: Table Of Contents
Table of Contents Introduction ...................... 4 Basic Cautions ....................5 Inspection Flow Chart ..................9 Bottom Blowdown Method ................10 1 BOILER VESSEL AND WINDBOX ................14 1.1 Condition of Water-tube (Fire Side) ..............15 1.2 Condition of Castable ..................16 1.3 Condition of Windbox Insulation Material ............ - Page 3 5.3 Checking Feed-water Control Operation (Liquid Volume Control) ....47 5.4 Checking Safety Operations During Misfiring ..........50 6 WATER ........................51 6.1 Collecting Boiler Water ..................52 6.2 Measuring pH and Conductivity ................ 53 7 MEASUREMENTS ...................... 54 7.1 Inspection for Boiler Interior ................55 7.2 Combustion Adjustment Procedure ..............
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Page 4: Introduction
Introduction Periodic boiler inspection shall be conducted to maintain safe and optimal operating conditions. This is the most essential aspect of boiler maintenance. The inspector shall be experienced in the all operating procedures and evaluation criteria. The inspector shall fulfill the true purpose of the inspection, without omissions or errors. -
Page 5: Basic Cautions
Basic Cautions I. Wear appropriate clothing and protective gear. Do not wear bulky clothing or accessories that may be caught by the valves or mechanical parts during maintenance. Do not wear clothing that contains flammable oil. A clean working cloth makes a good impression and helps prevent accidents. - Page 6 III. Check the boiler installation conditions Boiler room Ensure that a ventilation fan and vent are providing adequate air supply to and outlet for the boiler exhaust. Failure to provide adequate ventilation may cause incomplete combustion and carbon monoxide poisoning. Air supply and Ventilation fan exhaust opening...
- Page 7 Safety-valve outlet Ensure that the end of the outlet pipe is directed to a safe area for steam discharge. OUTDOORS VENT-PIPE If the end directs a walkway or other equipment, SLIP ONTO THE SUPPORT blowing steam may cause injury or damage to DRIP PAN the equipment.
- Page 8 Electrical work Failure to follow the warning signals for electrical work Ground may result in a short circuit, electrical shock, or fire. Ensure the power source for the boiler has a dedicated circuit breaker. Ensure the power wire diameter and breaker Grounding capacity meet the specifications.
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Page 9: Inspection Flow Chart
Inspection Flow Chart Clean the P.89 oil-pump filter Check nozzle Clean tip of P.82 tip standard burner nozzle Cracking of P.30 Replace ignition insulator * Only for OIL-FIRED BOILER P.82 Adjust burner A to E nozzle dimensions dimensions Clean after Leakage from the disassembly and P.73... -
Page 10: Bottom Blowdown Method
Bottom Blowdown Method Difference between Complete Bottom Blowdown and Partial Blowdown Two methods are available for removing boiler sludge. To properly evaluate which method to use, the operator needs to consider a number of factors, including water quality, potential increase or decrease in pH, timing of blowdown, hours of operation, and operating requirements. - Page 11 Procedure If the steam-pressure gauge indicates 20 to 30 psi, go to step 5. Else, go to step 2. Open the air-vent valve to release the vacuum. Open the feed-water valve and fuel valve. The main steam valve remains closed. Turn ON the operation switch to start feeding water.
- Page 12 Partial Bottom Blowdown Timing of blowdown Same as Complete bottom blowdown. Procedure Follow the same steps as the complete bottom blowdown when the boiler is started, except: Open the blowdown valve for only 30 seconds. The idea is to lower the water level below the conductivity sensor.
- Page 13 The purpose of blowdown is to eject boiler sludge from the boiler shell, to control the concentration of boiler water and its pH. When the boiler is shut down or in standby mode, the boiler water has a high pH and low amount of dissolved oxygen.
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Page 14: Boiler Vessel And Windbox
1 BOILER VESSEL AND WINDBOX... -
Page 15: Condition Of Water-Tube (Fire Side)
The layout of the water tubes varies between the boiler models. Water tube clearance in unique in each model, confirm the abnormality is valid. If deformation is discovered in the water tubes, identify the cause, take photos, and ask MIURA technicians for instructions. Leaving this problem untreated can lead to a dangerous condition. Prompt action is necessary. -
Page 16: Condition Of Castable
Check the castable at the top of the furnace for cracking or disengagement using the inspection light and a reflective mirror. Evaluation criteria If cracking or disengagement of the castable is detected, repair it immediately. If disengagement is particularly significant, take photos, and ask MIURA technicians for instructions. Inspection light Castable Water tube Castable Castable CA-10Z（ASAHI GLASS CERAMICS）... -
Page 17: Condition Of Windbox Insulation Material
1.3 Condition of Windbox Insulation Material Procedure Inspect the condition of the windbox insulation material while inspecting the condition of the water tubes. Light the interior of the furnace with the work light and check that none of the insulation material has dropped to the bottom of the furnace. -
Page 18: Condition Of Air Diffuser (Ex Type Only)
1.4 Condition of Air Diffuser (EX Type Only) Procedure Conduct this check when checking the condition of the water tubes. Using a work light or inspection light, ensure that there is no deformation or burning due to overheating. Note) The air diffuser is extremely hot immediately after the combustion. Inspect the air diffuser after it has cooled down enough to be touched with bare hands. -
Page 19: Tightening The Windbox
1.5 Tightening the Windbox Procedure Using an offset wrench, tighten the fixing bolts for the windbox diagonally several times so that they are evenly tightened. Evaluation criteria Tighten evenly, as a loose windbox fixing bolt may cause combustion-gas leakage. If combustion-gas leakage occurs, replace the windbox packing when the windbox packing is deformed. -
Page 20: Inspection For Gas Leakage
Additional check: Check for gas leakage between the shutoff valves and burner using a gas-leakage detector while firing the boiler. When a detailed investigation is necessary, ask MIURA technicians for the proper procedure. In the event of an abnormality When there is a potential gas leak yet no gas can be collected using the above method. -
Page 22: Leakage From Joints (Water, Steam)
1.7 Leakage from Joints (Water, Steam) Procedure Tighten the joints before operating the boiler. TIGHTENING AREAS TOOLS USED Union Pipe wrench, etc. Bolt, nut Spanner, offset wrench, etc. Main stem-valve nut Adjustable wrench, etc. Copper pipe – joint area Spanner, etc. Fire the boiler and check there is no leakage of steam at full-load system pressure. -
Page 23: Leakage Of Exhaust Gas
1.8 Leakage of Exhaust Gas Procedure Fire the boiler Visually check for exhaust leakage from the casing, chimney insertion area, chimney elbow, and windbox. Use an inspection light for areas that are hard to see. Evaluation criteria Exhaust leakage is not allowed. If a leakage occurs, the surrounding area becomes discolored due to overheating. -
Page 24: Inspecting The Safety Valve
1.9 Inspecting the Safety Valve Procedure Check for leakage from the safety valve Close the main steam valve and increase the steam pressure to the normal pressure used by the customer. Check there is no steam or water leakage from the outlet pipe on the safety valve. If leakage is found, the valve should be repaired or replaced. -
Page 25: Blower
2 BLOWER... -
Page 26: Condition Of Air Filter
2.1 Condition of Air Filter Procedure Stop the boiler (to stop the blower). If the air filter is inspected while the boiler is running, dust may be sucked into the combustion chamber. If any dust is attached to the screen guard, clean it off. Clean the air filter from top to bottom with a wire brush. -
Page 27: Damper Operation
2.2 Damper Operation Procedure Hold the coupling by hand and move it horizontally (vertically) to make sure it is not loose. If it is loose, the damper fix screws may become loose or the damper plate may be damaged through contact with the duct. - Page 28 For your information If the damper fix screws are too long, they may contact the damper plate. Under poor working environment, spray a lubricant such as CRC onto the damper bearing to prevent it from seizing due to corrosion. Adjust the micro-switch after completing every combustion adjustment, unless there is an abnormality. The WX boilers have a different damper structure, as shown in the diagrams below.
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Page 29: Burner
3 BURNER... -
Page 30: Inspecting The Ignition Spark Cable
3.1 Inspecting the Ignition Spark Cable Procedure Inspect the following areas: Connection between the ignition transformer and ignition spark cable Remove any dust or moisture. Replace the connecting terminal on the ignition transformer if there are burn marks or cracks on it. -
Page 31: Inspecting The Uv Sensor
3.2 Inspecting the UV Sensor Procedure Remove the UV sensor from the pipe and remove the protective cover. Hold the socket and pull out the sensor body. Clean the UV-sensing surface with a soft cloth. Put the UV sensor body and protective cover back on the pipe. In the pre-purge condition, confirm that the sensing surface of the UV sensor is not self-discharging. - Page 32 The ultraviolet phototube (ZUV-II sensor) is a flame detector that detects ultraviolet radiation in the combustion flame and outputs electrical signals to the combustion control system. Boiler ignition operation is not possible if ultraviolet radiation is detected while no actual combustion is occurring. Also, if no ultraviolet radiation is detected during combustion, the combustion control system closes the gas shutoff valve to prevent boiler combustion.
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Page 33: Inspecting The Pilot Burner
3.3 Inspecting the Pilot Burner Procedure Close the gas valve. Remove the pilot burner. Check the pilot burner by following the evaluation criteria. After completing the inspection, reassemble the parts to their original condition. Open the main gas valve. Check for combustion and check for gas leakage from the position where the burner was removed. - Page 34 Evaluation criteria Spark rod Insulation resistance: 50 Mohm min. when measured by dielectric tester. No significant wear at the spark position. Heat-shrink tube and silicone tube These are used to prevent short-circuiting from the spark rod. Ensure that the sheath is not ruptured and that the seal is continuous.
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Page 35: Inspecting The Main Burner
3.4 Inspecting the Main Burner Procedure Close the gas valve. Remove the pilot burner and the main burner as a unit (WX, EX). Remove the burner cover (LX). Check the main burner by following the evaluation criteria. After completing the inspection, reassemble the parts to their original condition. Open the main gas valve. -
Page 36: Feed Water
4 FEED WATER... -
Page 37: Cleaning The Feed-Water Strainer
4.1 Cleaning the Feed-water Strainer Procedure Close the feed-water source valve. Note) Also close the feed-water stop valve to prevent counter-flow when the boiler is pressurized. Using a pipe wrench and adjustable wrench, remove the cap from the feed-water strainer. Catch the water in a container so that the floor does not get wet. -
Page 38: Cleaning The Surface-Blowdown Strainer
4.2 Cleaning the Surface-blowdown Strainer Procedure Close the ball valve at the upstream of the surface-blowdown strainer. Note) Conducting an inspection after complete bottom blowdown, open the vent and confirm the boiler is at atmospheric pressure Using a pipe wrench and adjustable wrench, remove the strainer cap. Take care, as excessive force on the pipes may break them. -
Page 39: Inspecting The Electrode
4.3 Inspecting the Electrode Procedure When steam pressure is present, lower the pressure to 30 psi and conduct complete bottom blowdown. Note) When steam pressure is not available, open the vent valve and remove the boiler water under no-pressure blowdown conditions. Open the vent valve. -
Page 40: Leakage Test For The Feed-Water Pump
4.4 Leakage Test for the Feed-water Pump Procedure Run the feed-water pump under normal boiler pressure and observe the leakage from between the motor and impellers. Note) It is possible to observe the leakage at low steam pressure. However, when the amount is very small, it may be difficult to confirm that water leakage is occurring. -
Page 41: Checking Surface Blowdown Operation (Short-Circuit Test)
4.5 Checking Surface Blowdown Operation (Short-circuit Test) Procedure Turn ON the operation switch. Short-circuit the blue terminal (A) and green terminal (B) on the boiler conductivity sensor (see photograph below). Evaluation criteria If the surface blowdown shutoff valve does not operate, inspect the wiring to the electrode retainer, CPU board, and relay board. -
Page 42: Checking For Check Valve Counterflow
4.6 Checking for Check Valve Counterflow Procedure Run the boiler to achieve normal steam pressure. Turn OFF the combustion switch and operation switch. Close the feed-water valve at the outlet of the feed-water tank. Open the vent valve of the feed-water pump and check that water is not continuously discharged. Note that this is hot water. - Page 43 Line type BODY SPRING DISC BODY SEAL O-RING SEAT Ensure this spring is not broken...
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Page 44: Control
5 CONTROL... -
Page 45: Checking The Steam-Pressure Switch Operation
5.1 Checking the Steam-Pressure Switch Operation Procedure Open and close the main steam valve to change the boiler load, and confirm that combustion is conducted according to the steam-pressure switch setting. Note) In the XJ1 microcomputer boiler, normal pressure is controlled by the pressure sensor. -
Page 46: Checking Gas Pressure Switch And Airflow Switch Operations
5.2 Checking Gas Pressure Switch and Airflow Switch Operations Procedure Gas-pressure switch High-pressure cut ≤ 1.5 x manifold pressure Low-pressure cut ≥ 0.5 x regulator secondary/outlet pressure Preferred setting is close to manifold pressure. Set values vary according to the specification. In the case of high-pressure cut: Slowly decrease the set value of the gas-pressure switch while running the boiler. -
Page 47: Checking Feed-Water Control Operation (Liquid Volume Control)
5.3 Checking Feed-water Control Operation (Liquid Volume Control) Procedure Standard water-level control: L.V.C. Turn ON DIP-SW1-1-#1 on the CPU board to show the boiler water level as a bar graph on the XJ1 display. (However, low water level is displayed only during firing.) 16 Characters x 2 Lines BAR GRAPH Confirm that the feed-water pump starts pumping when the operation switch is turned ON after... - Page 48 Both standard and dual water-level control operate when firing the boiler. It may appear that the feed-water is controlled by only standard water-level control at high fire because the water boils harder than at low fire. If the boiler doesn’t have XJ1, read the wiring diagram or ask MIURA technicians about the control. L-probe...
- Page 49 Boiler feed-water is controlled by “liquid volume control” which electrodes measure the water level inside the boiler shell, “dual water-level control” using the two-way water-level electrode holder installed in the top of the boiler shell to prevent empty firing. If feed-water control probes are not conducted correctly, the water-feed pump may not start and stop correctly.
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Page 50: Checking Safety Operations During Misfiring
5.4 Checking Safety Operations During Misfiring Procedure Measure the pre-purge time and post-purge time under normal running conditions. Check safety operations during misfiring. Remove the UV sensor and position it such that the light (violet rays) from a gas based flame continuously shines on it. -
Page 51: Water
6 WATER... -
Page 52: Collecting Boiler Water
6.1 Collecting Boiler Water Procedure STRAINER Open the boiler-water sample valve slowly and drain the water for 5 seconds. After washing a beaker (2 L) thoroughly with boiler water, collect approximately 1 L of boiler water and close the boiler-water sample valve. Note) Collecting the boiler water (hot water) directly into the sample bottle may result in burn injuries. -
Page 53: Measuring Ph And Conductivity
If the difference is too large, clean or replace the conductivity sensor. If you cannot fix the reading problem, ask MIURA technicians for instructions. Note) If the electrical conductivity exceeds 4000 uS/cm, there is a possibility that carry-over will... -
Page 54: Measurements
7 MEASUREMENTS... -
Page 55: Inspection For Boiler Interior
7.1 Inspection for Boiler Interior Procedure After the steam pressure drops to 30 PSIG or less, conduct bottom blowdown. If steam pressure is not available, open the vent valve and drain the boiler water under no-pressure blowdown conditions. Check items upon completion of drainage: •... - Page 56 Scale evaluation table Evaluation criteria 1) A ..Scale thickness 0.0 mm. For your information No deposit of scale. The black surface of 1) When the scale thickness is even and there is the water pipe is visible. no peeling, removing a portion of the scale with a screwdriver, metal pipe, or similar object 2) B ..
- Page 57 Corrosion evaluation table Evaluation criteria 1) X ..No corrosion. No corrosion. The black surface of the water pipe is visible. 2) Y ..Corrosion exists. (Caution) The water pipe surface is red, but holes due to corrosion have not reached the interior of the water pipe (steel pipe).
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Page 58: Combustion Adjustment Procedure
7.2 Combustion Adjustment Procedure Vent air from the gas Start piping. (In start-up) Pilot ignition Main ignition Adjust a main gas orifice differential Adjust the damper opening pressure at high fire (refer to P.64) % is OK? CO% is OK? Low fire hold: ON Adjust a main gas orifice Adjust the damper opening... -
Page 59: Pilot Adjustment
7.3 Pilot Adjustment Procedure The size of the pressure check port is ¼" NPT (previously 1/8" NPT). Adjust the regulator with a flathead screwdriver. Set to pilot hold. Turn ON the protect relay test switch after shifting to pilot to maintain the pilot condition. - Page 60 Attach a manometer to pressure-check tees 1 and 2, and measure the pilot-gas differential pressure. In the same manner, measure the pilot-air differential pressure across pressure-check tees 3 and 4. Use the adjusting screws on the regulator to make adjustment of pressure. Release pilot hold after measurement is complete.
- Page 61 For your information When adjusting the pilot differential pressure, adjust from the high-air-flow side first, then determine the gas side. When an adjustment is made on one of the sides, the pressure on the other side changes. You are recommended to attach two vinyl hoses to show the change in differential pressure after adjustment at a glance.
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Page 62: External Adjustment Of The Pilot Burner
7.4 External Adjustment of the Pilot Burner Adjust pilot burner combustion on-site if the flame is unstable during pilot firing or if the flame goes out while shifting to main ignition. Shut off the main gas valve on the boiler. Remove the pilot assembly and flame eye (UV sensor). - Page 63 Note) This procedure does not apply to WX model boilers or old-style LX-200 models with one pilot and two burners. Ask MIURA technicians for instructions about these. The photographs below show the pilot flame of WX, LX-200 as a reference.
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Page 64: Main Burner Adjustment
7.5 Main Burner Adjustment Procedure The size of the pressure check port is ¼" NPT or 1/8" NPT. Adjust the regulator with a socket wrench. Set to high fire. Check the main-gas differential pressure. Check the main regulator secondary/outlet pressure at pressure-check location 1 and check the main- gas differential pressure at pressure-check location 2 and 3. - Page 65 Evaluation criteria Display the flame voltage in the monitor mode and confirm that it’s stable at 3V or more. (8 μA min. for BL controller.) Both O % and CO% must be within the specified range. Additional check Check that the pressure of gas source is within the specified range and both pilot and main gas pressures are constant during standby, ignition, starting high fire operation.
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Page 66: Adjustment Of O % And Co% In Exhaust Gas
7.6 Adjustment of O % and CO% in Exhaust Gas Measure after a few minutes when combustion conditions stabilize. Warm-up the combustion analyzer. Procedure Operate the boiler at high fire first. Ensure that the main-gas differential pressure has the appropriate value. - Page 67 After adjusting O %, ensure that CO% is within the appropriate range. If CO% is higher than the criteria value, adjust O % again until O % and CO% are both within the appropriate range. When appropriate values are achieved, tighten the lock nuts on the damper and ensure the values have not changed.
- Page 68 Lever type Remove the micro-switch cover. Loosen the screws of the micro-switch and damper, and adjust the position. Ensure the lever is not bent by contact with the micro-switch main unit. For your information Roles of the micro-switch: To check the mechanical operation of the damper. To detect changes in the damper position (airflow) from low fire to high fire and from high fire to low fire, and send signals to the combustion-control device.
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Page 69: Measuring The Furnace Pressure
7.7 Measuring the Furnace Pressure Procedure Attach a manometer to the pressure-check port to measure the boiler furnace pressure. Measure the furnace pressure at high fire. If necessary, measure the furnace pressure at low-fire conditions. Evaluation criteria Ensure the furnace pressure reading has the appropriate value with respect to the table of combustion adjustment values or values during the shop test at the factory. -
Page 70: Inspection In Monitor Mode
7.8 Inspection in Monitor Mode Procedure Press the XJ1 mode switches to set the status mode. Press the item change switches to select the item to be measured. Press the DATA switch to set the status mode. Turn the selector switch to confirm each item value. - Page 71 When exhaust-gas temperature is low: Insufficient input – Check the main-gas differential pressure Note) The exhaust-gas temperature changes as the feed-water temperature changes. Be sure to compare data measured under the same conditions. 2. Measuring the feed-water temperature Measurement conditions Measure the feed-water temperature at a steady state.
- Page 72 Evaluation criteria Refer to the on-line report and shop test data from the factory and ensure the temperature has not risen. <FieId start up> Operate the boiler continuously at 70 psi steam pressure. After 10 mins, temperature will stabilize, take the reading as a reference (actual measurement) for setting scale monitor limit temperature.
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Page 73: Checking Smoke From Chimney
7.9 Checking Smoke from Chimney Procedure After adjusting the combustion, visually check that no smoke is emitted during ignition, firing, or when boiler stops. White smoke exists. Air too rich Black smoke exists. Air too lean In the event of an abnormality, identify the cause and readjust the combustion. Note) For an oil-fired boiler, check the smoke using a BACHARACH... -
Page 74: Measuring The Feed-Water Pump Capacity
7.10 Measuring the Feed-water Pump Capacity Procedure Run the boiler until the customer’s maximum service steam pressure is achieved. Measure the feed-water pump ON time and OFF time when the feed-water pump begins to switch on and off after the steam pressure stabilizes. After approximately 10 switching operations, ensure the ON time is shorter than the OFF time. -
Page 75: Measuring The Supply Voltage
7.11 Measuring the Supply Voltage Procedure Measure the voltage across R and S at the maximum range of the tester. After determining the voltage, adjust the tester to an appropriate range. Measure the voltage across the following phases: R phase – S phase, S phase – T phase, T phase – R phase All inter-phase voltages should be stable and approximately identical. -
Page 76: Measuring The Motor Current
7.12 Measuring the Motor Current Procedure Set the clamp tester to maximum range. While the motor is running, the clamp tester onto one of the three phases wiring on the closest side of the motor and take a current measurement. Adjust to the nearest range larger than the actual measurement and take an accurate measurement. -
Page 77: Oil-Fired Boiler
8 OIL-FIRED BOILER... -
Page 78: Checking Soot Deposits On The Water Pipes (Oil-Fired Boiler Only)
8.1 Checking Soot Deposits on the Water Pipes (Oil-fired Boiler Only) Procedure Check the condition of the soot deposits using a work light or inspection light and a reflective mirror. General deposit: Inadequate combustion adjustment, low oil temperature, etc. Local deposit: Failure of parts such as the oil nozzle, gas spread plate, or air diffuser. Dimensional or installation problems of the burner. -
Page 79: Inspecting The Economizer (Oil-Fired Boiler Only)
8.2 Inspecting the Economizer (Oil-fired Boiler Only) Procedure Note) If the chimney is shared, exhaust-gas counterflow may occur when other boilers are running. Begin this inspection after closing the flue-gas damper and stopping other boilers. (Be sure to obtain approval from the user.) Open the inspection cover with a wrench. -
Page 80: Removing The Burner (Oil-Fired Boiler Only)
8.3 Removing the Burner (Oil-fired Boiler Only) Procedure Turn OFF the operation switch. Close the fuel-source valve. Climb up the ladder for the boiler. Leave the necessary tools on the boiler in advance, as it dangerous to climb while holding tools. Note) To prevent accidents, check the burner area and footing before starting work. -
Page 81: Inspecting The Burner (Oil-Fired Boiler Only)
8.4 Inspecting the Burner (Oil-fired Boiler Only) Procedure Turn OFF the operation switch. Check the burner dimensions and degree of soiling when the burner is removed. Note) The diagram below shows the dimensions for the EX100. The dimensions depend on the boiler model and serial number. - Page 82 Note) The combustion characteristics deteriorate if the clearance of the slit in the gas spread plate is NO GAP HERE constricted by soot or enlarged after opening with pliers. Lack of clearance between the gas spread plate and the burner, as in the figure to the right, reduces the combustion characteristics.
- Page 83 Assemble the burner by reversing the steps of disassembly, paying attention to dimensions and the installation position. For your information A spark rod may crack if overtightened. If it is too loose, it may be positioned incorrectly during the installation of the ignition spark cable. Take extra care on applying force to tighten the spark rod (EX-100 only).
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Page 84: Check Leakage From The Solenoid Valves (Oil-Fired Boiler Only)
8.5 Check Leakage from the Solenoid Valves (Oil-fired Boiler Only) If no circulation line is provided Stop the boiler. (Turn OFF the operation switch.) Disconnect the copper pipe joints near the secondary solenoid valves for low fire and high fire. Refer to “Removing the Burner”... -
Page 85: Testing The Ignition Transformer Capacity (Ex-100 Only)
8.6 Testing the Ignition Transformer Capacity (EX-100 only) Procedure Stop the boiler (Turn OFF the operation switch.) Close the fuel-source valve. Remove the burner with a double-ended wrench. Place the burner in a location that satisfies the following conditions: Discharge at the ends of the spark rods can be safely observed. No impact of air from the combustion chamber. - Page 86 Turn off circuit breaker to oil motor. Short-circuit the oil-pressure interlock and disconnect solenoid valve on oil line. Turn ON the operation switch, then turn ON the combustion switch. The ignition begins pre-purging. Make the evaluation of the spark and measure the duration. Evaluation criteria Good Spark at the end of the spark rods.
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Page 87: Cleaning The Oil Strainer
8.7 Cleaning the Oil Strainer Procedure Close the oil valve and drain the oil strainer. Use a wrench to remove the bolt that fastens the cup (bottom part of the oil strainer). Remove the cup, taking extra care not to damage the gasket. Submerge element in cleaning oil and clean it with a brush while turning the strainer handle. -
Page 88: Cleaning The Oil-Pump Filter
8.8 Cleaning the Oil-Pump Filter (only applicable for Danfoss PM100900) Procedure Close the oil valve. (Turn OFF the operation Oil-pump cover switch.) Place a bucket under the oil pump. Note) Check the oil temperature in advance to avoid burn injuries. Use an Allen key to remove the bolt that secures the oil-pump cover.