MANUAL - 미우라보일러 · MANUAL Once-Through Boiler (oil fired) Please use Miura Boiler after...

MANUALOnce-Through Boiler

(oil fired)

Please use Miura Boiler after reading this Manualaccurately and keep it at the place visible to you sothat you may read it conveniently any time.

KOREA MIURA CO., LTD

MANUAL No. EZ-K001-201009

EZ-500KEZ-600KEZ-800KEZ-1000KEZ-1500K

EZ-1700SKEZ-2000KEZ-2500KEZ-3000K

Thank you very much for yourunchangeable encouragement onMIURA BOILER and purchasing itat this time.

This manual is a guide for using MIURA BOILER.Be sure to decide a person in charge of it befor using and theresponsible person shall use it after understanding the manual fully.And then proceed to working through carrying this manual with youall the time.

The major contents of this manual are classified into EZ type outline,major function, inspection on operation system before using,operation, repair & inspection and trouble & its remedy.

The matters to be observed on operation and safety described in thismanual are related only to the case that the boiler is used only for thedesignated purpose.Never use the method that is not described in this manual. We are notresponsible for the using method that is not recorded in it.

If you have any question on the purchased product or this manual,contact our A/S office any time without further hesitation.

·EZ-500K …………………………………………………………………………………………………… 4·EZ-600K …………………………………………………………………………………………………… 5·EZ-800K …………………………………………………………………………………………………… 6·EZ-1000K …………………………………………………………………………………………………… 7·EZ-1500K …………………………………………………………………………………………………… 8·EZ-1700SK ………………………………………………………………………………………………… 9 ·EZ-2000K…………………………………………………………………………………………………… 10·EZ-2500K…………………………………………………………………………………………………… 11·EZ-3000K…………………………………………………………………………………………………… 12

·Careful matters before using the boiler …………………………………………………………… 13·Simple clothes and wearing of protective devices ……………………………………………… 14·When an abnormality is found out…………………………………………………………………… 15·Careful matters when using the Boiler……………………………………………………………… 16·Preparation of fire extinguisher and emergency medicine …………………………………… 16·Prohibition of remodeling without permission …………………………………………………… 17·Request at the time of moving and resale ………………………………………………………… 17

·Title and function of S/W ……………………………………………………………………………… 21·Display contents of monitor …………………………………………………………………………… 22·Oeration of controller and its using method ……………………………………………………… 23·Operation of main steam V/V ………………………………………………………………………… 28·Water drain of feed water pump……………………………………………………………………… 29·Air drain of feed water pump ………………………………………………………………………… 30

·Inspection item before using ………………………………………………………………………… 18

CONTENTS

·In case of possible destruction by freezing………………………………………………………… 36·When a boiler is not used for a long period ……………………………………………………… 37·Table of the place and time for inpection and cleaning ……………………………………… 38

·Inspection on chemicals feed pump …………………………………………………………… 39·Inspection on soft water…………………………………………………………………………… 42·Inspection on oil pressure ………………………………………………………………………… 43·Inspection on steam pressure …………………………………………………………………… 44·Inspection on combustion ………………………………………………………………………… 44·Blowdown method …………………………………………………………………………………… 45·Cleaning of feed water tank inside……………………………………………………………… 47·Cleaning of feed water strainer ………………………………………………………………… 48·Cleaning of burner ………………………………………………………………………………… 50·Cleaning of cds cell ………………………………………………………………………………… 53·Cleaning of oil strainer …………………………………………………………………………… 54·Cleaning of oil tank ………………………………………………………………………………… 55·Analysis of water quality ………………………………………………………………………… 55·Safety V/V……………………………………………………………………………………………… 56·Water level gauge glass …………………………………………………………………………… 56

·In case a buzzer rings and a warning lamp is flickering……………………………………… 57·In case an alarm lamp is lit up ……………………………………………………………………… 58·Remedy before request for repair …………………………………………………………………… 59·Resetting of electronic S/W …………………………………………………………………………… 60·Check on connection terminal of electrode preservation device……………………………… 61·Remedy on electric leakage …………………………………………………………………………… 62

·Maintenance service……………………………………………………………………………………… 64·Use the convenient repair maintenance contract services …………………………………… 64·Use rated product of leading maker for boiler chemials ……………………………………… 65

·Starting(normal opertion)……………………………………………………………………………… 33·Inspection matters during operation………………………………………………………………… 34·Stop ………………………………………………………………………………………………………… 35

1

The following captioned terminology has been used so that efficient handling together with safetymay be made.Please use the Boiler after understanding captioned terminology fully.

The number beside this mark displays related page.☞This mark displays prohibition.Specific prohibition contents in the middle of this code and near itare displyed.

In case of incorrect handling it may cause the user tobe killed or injured seriously.

In case of incorrect handling it may cause the user tobe injured or incur material damage.

In case convenient matters and points are explained inorder to prevent the trouble of machine body and carryout efficient work.

2

The condition of supplying water into the inside of boiler.

The condition of completing prior action in order that boiler operation may be made.

Ventilation of inside of combustion chamber before starting combustion.

Condition of ignition trans operating

The condition of 50% combustion of maximum combustion capacity.

The condition of combustion of maximum combustion capcity.

Ventilation of inside of combustion chamber after combustion.

When designated water level is not reached, an action without transition to ignition.

The condition of operation standby due to isolation by pressure.

Attached substances、impurities such as calcium and magnesium contaied in the water.

Impurities sunk in boiler inside.

The water before water treatment.

The water removed from calcium and magnesium contained in the water.

The water to be treated and trasferred to boiler or the condition of water transferring.

Amount per 1 hour of full steam to be made from supplied water.

The phenomenon that impurites and moisture in boiler water together with steam are given off.

Draining the water in boiler inside.

Tube that boiler water flows in inside and is in contact with combustion gas.

System heating the supplied water to reduce O₂melted in the water.

The condition that P/P is not operated normally with influx of air into P/P.

■ The terminalogies that have been used in this manual are collected and check the themand their meaning.

3

System pressurizing raw water up to pressure reguired for softener.

Normally, raw water is hard one. It is system to change it as soft one.

System monitoring the soft water treated in softener.

System supplying chemicals capable of preventing the corrosion of boiler to it.

System storing the water returned after using softened water and steam and then supplying therequired water at the time of water supply.

The water pressuized and influxed into water pipe is heated by a burner.The heated water is being evaporated slowly and supplied to load side.

City water and underground one to be used widely as boiler water can melt various impuritiesand are various in their amount. In case of using the water with impurities without anytreatment the efficiency and life of boiler may be influenced significantly by scale, corrosion,carryover, etc. Our company has been producing the water treatment system for exclusive useof MIURA BOILER by kind. Above item is the kind of standard water treatment system. Foran optimum water treatment system of boiler of user, consult our A/S office freely.

13

Careful matters before using the boiler

When operating MIURA Boiler, observe all of the following careful matters.If not observed, personal accident may take place.

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Carry out a trial operation by a person in charge of A/S after checking the installation.

When using the machine, be sure to designate a person responsible for handling and the person use it after understanding this manual fully.

Never operate the machine and do not repair work until thismanual is understood fully.

Since the boiler water can be changed by used water quality and piping materials, never use it as drink one.

In using the boiler various reports are required. Consult a person in charge of our marketing staff for the detailed matters.

Check that the machine has been installed accurately according to theinspection before using.

14

Simple clothes and wearing of protective devices

Never operate the machine and do not repair work throngh wearing loose clothes, accessories, etc. easily to be caught on valves and machine parts.Never wear the clothes attached with oils likely to catch a fire.

Wear helmet, protective glasses,safety shoes, gloves, etc.according to work. In particular,when injecting chemicals, wearprotective glasses and rubbergloves so that the hands andeyes may not be in contact with them.

15

When an abnormality is found out


When an abnormality such as abnormal sound, smell, smoke, fuel leakage, etc. is found out,lock up fuel valve directly after turning operation S/W as "OFF". A danger such as a fireor a blast may take place.

Observe the instruction of ourcompany on abnormalityhandling.Never use the machine in thestate that the cause forabnormality has not beenremoved fully, which may lead todangerous fire, blast, etc.

16

Careful matters when using the boiler

Preparation of fire extinguisher and emergency medicine

In preparation for anyemergency, install a fire extinguisher and understand its using method.

Designate the storing place of emergency medicine box and prepare it.

Don't touch other part than operationone when operating the machine, which may cause dangerous electric shock, scald, etc.

When operating, make an operation together with ventilation and don't close ventilation port.Intoxication of carbon monoxide by incomplete combustion may take place.

* In case boiler fuel is placed near inflammable materials a fire may break out.

* Never place inflammable substances near the boiler.

* Never place inflammable substances inside a control box.

In case of using otherfuel than designated one a blast may take place.

17

Prohibition of remodeling without permission

Request at the time of moving and resale


For operation of boiler, a proper installationwork and an optimum additional device arerequired. At the time of moving and resaleof boiler, contact our marketing office without fail. Other installation work and additional device connection than those designated by us are prone to cause personal accident so you had better not do that for the safety.

Since the manual is required for boileroperation, hand over it to enduser togetherat the time of resale.

Remodeling not recommended byour company may cause theproblems in safety such asconnection to related additionaldevices, piping. etc. In case ofremodeling, consult our A/S staffin advance.Our company is not responsible forthe remodeling without our priorapproval.

18

Before using MIURA Boiler, check the following installation item and make sure that theyare installed correctly. The danger of serious accident is existent all the time so you arerecommended not to use the machine under incorrect installation situation.

Check if the ventilator and exhaust fan areinstalled.If a sufficiant air exhaust is unavailable, dangeroustoxic of carbon monoxide and blast by incompletecombustion may take place as well.

Check if the material of base is not made of woodsuch as inflammable material.If it is used, a fire and other accidents may takeplace.

Boiler installation shall not be made in theinflammable and dangerous material handling placeand make sure that the distance from inflammablematerials is farther than 45cm.

If not snfficient in horizontal distance between oiltank and boiler an explosion is likely to take placedangerously.

Inspection item before using

Exhaust deviceVentilator

Inflammablematerial

Farther

than

Inflammable material

19

If warning matters on electric work are not observed,it may lead to electric shock or other serious accident.

Make sure that an exclusive use breaker as powersource of boiler is attached.

Check if a breaker attached to main power source isan electric leakage one.

Check if cable thickness and breaker capacity are inaccordance with designated specification or not.

Make sure that ground wiring is connected to earthterminal inside a boiler control box.

Make sure that penetration part of exhaust tub iscomposed of incombustible materials. If it is composedof combustible materials a fire may take place.

Check if inflamable materials are not near thecircumference of exhaust tub. If they are existentnearby, it may be the cause for a fire.

Check if airtightness and fixation of it are made fullyor not. If not, a toxication accident by exhaust gasleakage may take place.

Electric leakage breaker

Electric leakage breaker

Breakercapacity

Wiring

Earth terminal

Exhaust tub

Incombustiblematerials

20

Before using MIURA Boiler, check the following installation item and make sure that theyare installed correctly. The danger of serious accident is existent all the time so you arerecommended not to use the machine under incorrect installation situation.

Make sure that the direction is not dangerous topeople even though hot water is discharged at thedischarge piping end?If the end of piping is toward people there is a dangerof a burn and other accidents at the time of hot waterdischarge.

Make sure that the discharge piping is fixed securely.If not, the piping will move with reaction bydischarging, thereby causing a burn and other accidentsat the time of hot water discharge from piping.

Checking if piping is fixed securely or not.If not, the piping will move with reaction bydischarging, thereby causing a burn and other accidentsat the discharge of hot water discharge from piping.

Check if the end of drain piping is opened to safe placesuch as a bit and etc.If the end of piping is installed in the place withoutdrain device, the hot water discharge when drainingthe water may cause a scald and other accidents.

Dischargepiping Safety V/V

Drain pipingBit

21

Remote control display lamp

Under reservation operation display lamp

Under fire display lamp

Power lamp

Boiler fire / fire stop S/W

Reservation time setting is made with reservation setting S/W in time settingmode and reservation cancellation is made by pushing RESERVATION againor operation S/W.

When warning or alarm is generated a buzzer stops by one time operation and if onemore OPERATION is mode RESET is made.

When the selection and change of data rare fixed at mode of OPERATION setting and time settingthe selection and change are fixed by setting S/W operation.

FIRE S/W

Turing S/W as“ON”, water levelcontrol andchemicals injectionone are started.

OPERATION S/W

RESET

SETTING

OPERATION INSTRUCTION

In case a warning or an alarm is generated the matter to be taken properly to the situation while pushingthe S/W are displayed.

Title and function of S/W

LCD protection function: In case LCD operation is not made for one hour the screen is offthrough activation of LCD protection function. When LCD screen isOFF it is ON by pushing any operation key.

RESERVATION

Mode change S/W such as item change S/W of monitor, warningrecord, thermal control, operation setting, time setting, test mode

MODE CHANGE S/W

22

Display contents of monitor

At blow time it is lit up and during blow it is lit off.

When alarm matters are generated it is lit up.

When warning matters are generated it lit off.

Change to MONITIR WARNINGrecord, themal control, operationsetting, time setting and test by◁, ▷ change

Display of present day and time

Condition of present monitoring item

Display of boiler operation/stop condition

Display of boiler operation condition

Display of using fuel selection (decided by ROM)

Water level graph (display of present water level)

Display as 3 ea bars graph by each electrode

Low water level location

ALARM

BLOW

WARNING

MONITOR

23

1. Item change is made by drection key ◁,▷ operation.2. Item change is made by direction key △,▽ operation.

Note) In case operation setting and test mode are under operationthe setting is impossible.

-Example of display-


※ For thermal control item one day is integrated.

Monitor item ContentsDisplays the temp. of scale sensor within water tube.Displays the temp. of overheat sensor within water tube.

Scale monitorOverheat monitor temp.Condensed blow

。C。C

ON/OFF

Monitor item ContentsDisplays fuel consumption amount through integrating.Displays evaporated water amount through integrating.Displays fire time with high fire through integrating.Displays fire time with low fire through integrating.Displays ignition times through integrating.Displays feed water pumpON/OFF times through integrating.

Fule consumptionEvaporationHigh fire timeLow fire timeIgnition timesFeed water pump ON/OFF times

Nm³t

minmintimestimes

Operation of controller and its using method

→Monitor →Warning record →Thermal control →Operation setting →Time setting →Test

24


Note) In case a warning is generated, recent 10 items are stored at warning record mode automatically.

25


* When changing the contents of operation setting, consult our A/S office.

It may be the cause for a malfunction, fire, blast, etc. of boiler.

Item

MI NUMBER

SET DATEAUTO BLOW RATESCALE MONITOR(L)SCALE MONITOR(H)TWIN WATER LEVEL DLYLOW WATER DELAY TIMEDAMPER DELAY(L-H)DAMPER DELAY(H-L)EVAPORATIONSTART TIMEHEAT VOLUMEWATER TEMP.FUEL TEMP.FUEL VOLUME(L)FUEL VOLUME(H)KOREAN/ENGLISH/CHINESE

UnitMachinenumber

%

1。C

1。C

1sec

1sec

0.1s

0.1s

100kg/h

1hour

10

1

1

0.1

0.1

After selecting the change item with setting one in application of △,▽ S/W, pushing setting S/W thechangeable part is lit off.After completing the change in application of △,▽,◁,▷,S/W, pushing setting S/W again the settingchange is completed.

ContentsWhen instaling multi-tubes, boiler identification number is set and incase of single tube, setting as 1 is made.Change day of setting data is inputted.Condensed blow rate is set.When low fire is made, scale attaching alarm setting temp. is set.When high fire is made, scale attaching alarm setting temp. is set.Water level delay time is set.Low water level warning delay time is set.Time from high fire electronic V/VON to wind amount change is set.Time from high fire electronic V/VOFF to wind amount change is set.Actual evaporation amount of boiler is set.Data renewal by every one hour from the base time of thermal control data is set.Low level heat generation amount of using fuel is inputted.Temp. of using water is inputted.Temp. of using fuel is inputted.Fuel volume at the time of low fire is inputted.Fuel volume at the time of high fire is inputted.When selecting using language, one of three languages is inputted.

26


Reservation operation time is set at time setting mode.


Item Scope Contents

When adjusting Fire LOW FIRE ONLY is made.As the function capable of outputting specific parts forcibly whentesting boiler the forcible output is made by selecting with ON afterselection of parts.

Possible only if secret number is inputted

LOW FIRE ONLY

TEST OF INDIVIDUALPART

OPERATION SETTINGINITIALIZATION

ON/OFFFAN/WP/OP/IGT/VQ/VQ1/VQ2

Initializationof settingvalue of allof datum andoperations inmemory

Item Unit ContentsIt is set for month day/time change of monitor.Month day/Time change Hour

27

For reservation function, the reservation is possible by two kinds of time operation/weekday one.Reservation time is set ahead by selecting operation by reservation time or weekday through moving totime setting item by pushing ▷ S/W in the monitor state.Since changeable part is lit off by pushing setting S/W for reservation time setting, time setting iscompleted by pushing setting S/W again after setting the desired time in application of ▽,△,◁,▷arrow marks.

Pushing setting S/W after pushing a reservation S/W and selecting weekday operation the condition asshown in the following figure in the right is made and pushing a setting S/W after checkingreservation time the reservation is completed and the reservation lamp is lit up.When cancelling the reservation it is cancelled by pushing a reservation S/W once again or pushing anoperation S/W during reservation operation.

Pushing reservation S/W the screen as shown in the following figure in the left is seen and pushing asetting S/W the screen is changed as shown in one in the right. Four times reservation a day is possible and pushing a setting S/W through checking reservation timein application of ▽,▷ arrow mark the reservation lamp is lit up in the left of LCD. When pushing areservation S/W once again at the time of reservation cancellation or pusing an operation S/W duringreservation operation the reservation is cancelled.

Reservation function

28

1. Prepare a ladder.

2. Check location and direction of main steam V/V.

3. Open and close the main steam V/V on the ladder.

* Since main steam V/V is located at high place and its footing is limited, operate it in properclothes(long sleeve, long pants, safety shoes, safety helmet, gloves, etc) when switching on and off.

* Since whole boiler body is in the high temperature state directly after stopping it, never touchother part than the handle of main steam V/V. If touched, you may incur a scald and other injury.

Operation of main steam V/V

* In case a steam header is being installed during piping work, open main steam V/V.Main steam V/V of steam header plays a role of main steam V/V instead.

* Install backflow prevention V/V (check V/V for steam) in steam piping between steam headerand boiler.

ClosedOpened

* Never jump up and down the ladder.When going up and down, be sure to hold the ladderwith both hands and one leg or one hand and bothlegs in order that you may go up and down safelyagainst the danger of falling down.

29

* For the boiler of hot water specification and drain recovery, since the water in feed water piping ishot, do not work until the feed water piping cools down ( longer than 2 hours from the stop ofboiler) fully in order to prevent any injury such as a scald and etc.

Water drain of feed water pump

1. Close V/V of water supply and feed water source.2. Open V/V of water drain and air drain in the feed water

pump.* The water within the feed water pump is dischargedfrom water drain V/V.

3. Check if the water does not drain from water drainV/V.

* If not drained the drain work is completed.4. Close V/V of water drain and air drain in feed water

pump.

V/V of water drain and air drain in the feed water pump is somewhat different from that inspecification in some cases. Consult our A/S staff for proper use before using.

In case of solving the freezing problem by waterdrain of water tube and feed water pump, dodrain work of feed water pump as follows. Drain work of feed water pump shall be doneafter drain of water tube.

Never turn V/V of water drain and air drain morethan once. The water may eruput suddenly.

Open Close

Water drain V/V

Air drain V/V

Feed water pump

Closed

Opened

30

* For the boiler of hot water specification and drain recovery, since the water in feed water piping ishot, do not work until the feed water piping cools down (longer than 2 hours from the stop ofboiler) fully in order to prevent any injury such as a scald and etc.

Air drain of feed water pump

1. Open V/V of feed water source and feed water.2. Open V/V of air drain in the feed water pump.* The water mixed with air is drained from air drainV/V. When air is drained, only the water comes outfrom it.

3. Check if only the water comes out through an isloationof air.

4. Close air drain V/V

V/V of water drain and air drain in the feed water pump is somewhat different from that inspecification in some cases. Consult our A/S staff for proper use before using.

For the remedy on freezing in winter season bycleaning and draining the feed water strainer andin case of the feed water pump filled with air, dothe drain work as follows.If air is not drained the feed water pump does notwork properly. Never operate it until air drain iscompleted. When you operate P/P in the state thatwater is not existent the P/P may be brokenbadly.

Never turn air drain V/V more than once. Thewater may erupt suddenly.

Opened

Opened

Feed water pump

Air drain V/V

Open Close

31

* Don't operate the boiler with wet hands, which may

cause an electric shock.



1. Check if a short circuit breaker inside a control box isOFF or not.If it is ON, turn it as OFF.

2. Turn main power as ON.

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3. After opening air drain V/V of water pipe for about 5seconds, close it.

When main power is not used for a long time,turn it as OFF. Without it you may incur anelectric shock.

* In case even little pressure is left within the boiler(when a steam pressure gauge marks 0kg/㎠ above),do not open air drain V/V of water pipe. If it isopened, an eruption of steam may bring about aburn and etc.

4. After checking if the water is filled in feed water tankabove 2/3, open V/V of feed water source and feedwater.

5. In accordance with 「Using method of operation systemand air drain of feed water pump」in chapter 6, drainair from the feed water pump.

Opened

Opened

Opened

32

6. Check if the fuel is filled fully in oil tank and openthe fuel V/V in it.

7. According to 「Repair & inspection/ Chemicalsinjection inspection」, check if designated amount ofchemicals is in chemicals injection TK or not.

8. According to 「Repair & inspection/ Soft waterinspection」in chapter 9, check if feed water is madeas soft one or not.

9. Check if main steam V/V is closed or not.If not closed, close it in accordance with「Usingmethod of operation system/ Operation of mainsteam V/V」in chapter 6.

10. Turn a short circuit breaker within a control box asON.

42page☞

28page☞

39page☞

Closed



Opened

33

1. Complete 「Inspection and preparations before starting」in chapter 7.

2. Turn operation S/W as ON.* Water supply is controlled automatically and 「Operationstandby」condition is made. Check if 「Operation standby」condition is made or not.

3. Turn combustion S/W as ON.When 「combustion」lamp is lit up it alarms thatcombustion action is taken.

* Ignition action is taken after prepurge and then low isentered.

* Low combustion is passed after main try and highcombustion is being executed.

4. Wait until an indicated value of steam pressure guagereaches the designated pressure one(5kg/㎡).

5. According to 「Using method of operation system/Operation of main steam V/V」in chapter 6, open mainsteam V/V slowly.

* By repeating low combustion and high one alternately,supply the designated pressure steam.

Starting(normal operation)

Opened

34

* When abnormal phenomenon such as abnormal sound, smell, smoke, etc takes place, turn operationS/W OFF and close fuel V/V. Fire and explosion are likely to take place.

* For abnormal phenomenon handling, follow an instruction of our company A/S staff. Never use ourboiler in the state that the cause for abnormality is not removed fully.It may lead to the cause for a fire and explosion.

* Make sure that black smoke or white one comes out of astack or not.

* Make sure that any abnormality of a blower, a feedwater pump, etc in operation sound is present or not.

* Make sure that serious vibration or abnormal value inan indicator of steam pressure gauge and oil pressuregauge is present or not.

* Make sure that any fuel leakage is present or not.

35

1. Turn combustion S/W as OFF.* The combustion lamp is lit off.According to the condition post fire is executed.Thereafter post purge is being executed.

2. Check if post purge is completed or not.* Marking of display changes from 「Post purge」to「Operation standby」.

3. Turn operation S/W as OFF.

4. Turn a short circuit breaker in a control box as OFF.

5. Turn main power as OFF.

6. According to 「Using method of operation system/Operation of main steam V/V」in chapter 6, close mainsteam V/V.

7. Close V/V of water supply, main feed water.

Stop

If an operation is stopped without a sufficient postpurge, the gas heaped within the furnace may bethe cause for trouble.

Close

Feed water pump

* In case of danger of freezing, take a freezing remedyaccording to 「Repair & inspection / Danger offreezing」in chapter 9.

* In case of stop for a long time, see 「Repair &inspection / Standstill for a long time」in chapter 9.

* For operation of fuel V/V, operate only fuel V/V of oiltank. If closing other V/V than that of oil tank sincean oil in fuel piping is expanded by discharging heatof boiler body directly after boiler stop, there is somedanger of the damage in oil P/P and that of theleakage in fuel oil.

Main Steam V/V

36

In case of possible destruction by freezing

* Each part of boiler is made of hot temp. materials.Never touch other part than water tube blow V/V,which may cause a scald.

* Do not open water tube blow V/V abruptly, which maylead to a burn by means of abrupt eruption of hot water.

* Check if blow piping is fixed securely in order that itmay not be moved by any reaction of blow.

* Check if the end of blow piping is opened to safeplace such as a bit and etc.

1. Stop an operation according to 「Starting / Stop」inchapter 8.

2. Wait until the display of a steam pressure gaugereaches 0to 2kg/㎠

3. Open V/V of a water tube blow slowly and blow thewater tube.

4. When a steam pressure gauge exceeds 2kg/㎠, do notopen V/V of the water tube blow.

5. Close V/V of the water tube blow.

6. Drain the water form feed water pump according to「Using method of operation system / Drain of feed waterpump」in chapter 6.

35page☞

29page☞

The following instructional freezing remedy is an example. According to the regional situationsboiler installation, take a comprehensive freezing remedy including circumferentialinstruments. For the freezing remedy, consult our A/S office freely any time.

Blow V/V

Open slowly

Close

37

When a boiler is not used for a long period

In case of the standstill, consult our A/S office any time without fail.

In case a boiler is not used for a long time a proper preservation and control for the boiler isvery important.When the boiler comes to a standstill the concern about the maintenance & repair of theboiler tends to be negligent.Without good preservation condition of water tube during the standstill of the boiler somecorrosions may be rusted dangerously.The preservation method is classified into the full water one in application of the waterremoved from remained oxygen and the drying one by maintaining the inside of the boiler.

38

Table of the place and time for inspection and cleaning

* In order to maintain high economical efficiency and safety of EZ type MIURA Boiler for a long timeand prevent any possible accident in advance, take the following inspection and cleaning on a regularbasis. (Check the details with our A/S staff.)

* Even with standard inspection periods described herein the times of inspection and cleaning increasenaturally according to using condition such as bad water quality and etc. The proper times aresubject to using situations so follow the instructions of our A/S staff without fail.

Items of inspection and cleaning

Inspection chemicals feed pump

Inspection on a water softener

Inspection on steam pressure

Inspection on oil pressure

Inspection on combustion

Inspection on the low water level warning

Cleaning of the water supply tank inside

Cleaning of a water supply strainer

Request for water quality analysis

Inspertion on oil strainer i

Cleaning of burener

Cleaning of oil tank

Inspection on safety V/V

Inspection on sightglass of a water level gauge

Every day 1 month 3 months Every year

Period of inspection and cleaning

* Do not other work than the designated one, which may lead to personal accident.

39

Inspection on chemicals feed pump

1. Check remained chemicals through looking intoChemicals tank.

2. In case remined amount is small, insert an indicated inputamount of cleaning chemicals into the Chemicals tankthrough weighing it together with our A/S staff.

* In case of inputting chemicals, be sure to wearprotective glasses and gloves. If they are in contactwith your eyes and hands you may incur a loss ofeyesight and an injury on the hands.

* If the chemicals touch your skin directly, wash itwith the flowing water immediately.

* If they enter into the eyes, wash them with theflowing water instantly and consult with a doctor aswell.

Chemicals feed pump is essential to the water quality control of boiler. Use it correctly throughreading the manual of chemicals injection system thoroughly before using it. And keep it athand together with boiler manual in order that you may read them conveniently any time.

Follow the instructions of our A/S staff for an inputamount of chemicals.If you are negligent in supplimenting thechemicals, an air enters into chemicals feed pumpto the extent that the chemicals can not be suppliedto a boiler so you are required to inspect remainedchemicals without fail.In case of slow consumption of chemicals in thechemicals tank the air may enter into the chemicalsfeed pump so drain the air in the tank.

Chemicals feed pump

Chemicals

40

1. Turn combustion S/W as OFF.

2. Check remained chemicals in the chemicals tank.

3. If remained chemicals are small, replenish them intothe tank.

4. According to the manual of chemicals feed pump,attach one end of tube for air drain being an accessoryof chemicals feed pump to air outlet and put other endof tube into a weighing cup.

* When draining an air in the chemicals feed pump,wear protective glasses and gloves without fail. Ifthe chemicals are in contact with the eyes and handsa loss of eyesight and an injury on the hands maytake place.

In case an air enters into the chemicals injectionP/P, drain an air in it in the following manner.

Tube for air drain

Chemicals

41

5. Loosen air drain V/V of chemicals feed pump.

6. Open blowdown V/V of water tube in boiler.

7. Opening blowdown V/V water, while water supply to theboiler is being progressed the chemicals feed pump isoperated and then the chemicals including an air comeout. If all of air in the pump is emptied out, only thechemicals come out.

8. Check if an air in the chemicals feed pump is emptiedout and only the chemicals come out.

9. Close air drain V/V of the chemicals feed pump.

10. Close blowdown V/V.

11. Place the tube for air drain to the original location.

12. Check if the chemicals are leaked out or not.In case of their leakage, wash them with soft clothcleanly and remove the cause for the leakage.

* Never turn air drain V/V of the chemicals feed pumpmore than twice. Through eruption of chemicals youare likely to incure a loss of eyesight and an injuryon the hands.

Air drain

Open

Close

Air

Chemicals

Close

Open

42

Inspection on soft water

Water softener is essential to water quality control of boiler. After reading the manual ofwater softener carefully before using, use it correctly. And keep the manual at hand togetherwith boiler manual in order that you may read them conveniently.

Inspectioncock

Water softener

Hardness indicator

Salt

Salt lump

Salinewater

1. Discharge the water into an inspection cup intensely.(about 1.5l)

2. Wash a beaker with the water collected from aninspection cock.

3. Recollect about 50cc water from the inspection cock.

4. Rock the hardness indicator in the beaker properlythrough dropping 2 to 3 drops.

5. Check the color of water in the beaker.Blue : To be soft waterRed : Not to be soft water

6. In case of red color, take the following inspection.Inspect the salt in a saline tank. In case the salt is notin it, replenish the salt and in case a salty lump isformed, destroy it. Thereafter, regenerate it manually.

7. In case of red color despite of inspecting soft wateragain after above inspection, establish a proper remedyaccording to the manual of water softener.

43

Inspection on oil pressure

1. Inspect oil pressure during boiler combustion.Make sure that a combustion lamp is lit up.

2. Make sure that marking of oil pressure gauge is ratedvalue or not.

RRaatteedd vvaalluuee ooff ooiill pprreessssuurree

REach part is in the state of hot temperature duringboiler operation, don’t touch it. You may suffer someburn.

RIn case any abnormality is present in oil pressure,contact our A/S office after stopping an operationimmediately. If operating a boiler in the state ofabnormality of oil pressure continuonsly, somepersonal accident may take place.

RFor oil pressuree inspection, do it during boiler operating. An oil P/P is operated in the state ofcombustion but accurate pressure inspection is not possible if oil P/P is not operated.

44

Inspection on steam pressre

1. Follow ̀ operation/startingain chapter 8.

2. Make sure that an indicator of steam pressure gaugerocks extremely or displays abnormal value.

RIn case of any abnormality in steam pressure,contact onr A/S office after stopping an operationimmediately. If doing an operation in abnormalcondition of oil pressure continuously, it may lead tosome personal accident.

Inspection on combustion

1. Make sure that any black smoke and white one comeout of a stack or not.

In case that black smoke and white one come out,stop an operation immediately and contact ourA/S office. If operating a boiler in the state ofabnormal combustion, it may cause personalaccident.

45

Blowdown method

R

1. Proceed to 「Operation / Starting」in chapter 8.

2. Check if a steam pressure gauge displays 1.5 to 2kg/㎠or not.

3. Turn combustion S/W as OFF.* The combustion lamp is lit off and then post purge isproceeded. (At this time, close steam V/V.)

4. Check if post purge is completed or not.(When a blower stops, post purge is completedaccordingly.)

5. Check if a feed water pump stops or not.

After checking if a boiler stops or not, operate a blow. A scald and etc. may take place badly(A blow shall be operated on the next day from the standstill of the boiler.)

For blow operation, make sure that the instructions of our A/S staff shall be observed fullywithout fail.

RWhen the display of a steam pressure gauge isabove 2kg/㎠, do not operate a blow.Abrupt eruption of steam and hot water may causean injury such as a burn and etc. (When steampressure is high, down the pressure throughopening steam V/V.)

Steam pressuregauge

46

6. Turn operation S/W as OFF.

7. Blow water tube by opening about 1/3 of blowdown V/Vof boiler water tube slowly.

8. Check if blowdown is made fully or not.(Blowdown is completed fully in about 10 minutes)

9. Close blowdown V/V of water tube.

10. Turn operation S/W as ON.* Automatic water supply control is started and operationstandby condition is made.Check if 「Operation standby」condition is made or not.

* Each part of a boiler is composed of high temp.part. If contacting other part than blowdown V/Vof water tube you may bring about a burn and etc.

* Do not open blowdown V/V of water tube abruptly.A sudden eruption of hot water may cause a scaldor other injury.

* Check if blow piping is fixed solidly so that it maynot be acted by reaction of a blow.

* Check if the end of blow piping such as a bit andetc. is opened safely to the safer place or not.

Fix a knob of V/V during blowdown.If the knob of V/V during blowdown is changed,normal blowdown may not be made.

47

Cleaning of feed water tank inside

R

1. Turn main power of the boiler as OFF.Check if a steam pressure gauge displays 0kg/㎠ or not.In case it does not display 0kg/㎠, wait until the value isdisplayed.

2. Close replenishing V/V.

3. Open blow V/V of feed water tank.

4. When the water does not come out, close blow V/V offeed water tank.

5. Open replenishing water V/V.

In case of operating a main power, don't operate it bywet hands, which may be the cause for electric shock.

RSince the water in feed water tank capable of recollecting condensed water is hot, do not thework until the water cools down fully (about 2 hours later from stop of a boiler) to protect thedanger of being burned.

Close

Open

Close

Open

48

Claning of feed water strainer

R

1. Turn main power of the boiler as OFF.Check if a steam pressure gauge displays 0kg/㎠ or not.In case it does not display 0kg/㎠, wait until the value isdisplayed.

2. Check if feed water V/V and main feed water V/V areclosed or not.

3. Open air drain V/V of feed water pump.* Remove the pressure within feed water piping.

4. Open a cap of feed water strainer.

In case of operating a main power, don't operate it bywet hands, which may be the cause for electric shock.

RSince the water in feed water tank capable of recollecting condensed water is hot, do not thework until the water cools down fully (about 2 hours later from stop of a boiler) to protect thedanger of being burned.

RClose water supply V/V without fail. In case of abackflow of water any accident such as a scald andetc. may take place.

Close

Close

Air drain V/V

Feed water pump

Feed water strainer

Cap

The water in piping comes out when a cap of feedwater strainer is opened. In particular, in case oflong piping you had better use a bucket for a largeamout of water.

49

5. Clean a brush through picking out a filter.In case foreign materials in the gap of the filter are notremoved and in case it is deformed, you are required toreplace it with new one after consulting our A/S office.

6. Place the filter at original location of feed waterstrainer.

7. Tighten a strainer cap solidly.

8. Close air drain V/V of feed water pump.

9. When operating a boiler after cleaning the feed waterstrainer, drain an air in feed water pump according to`Using mothod of operation system / Air drain of feedwater pumpain chapter 6.

30page☞

Brush

Cap

Filter

Air drain V/V

Feed water pump

Close

50

Cleaning of burner

RSince each part of boiler is hot directly after boiler stop, don’t operate the boiler until it

cools down fully(until about 2 hours after boiler stop). You may incur some scald.

Since the frequency of burner cleaning changes due to the fuel usage and its condition,

follow an instruction by our A/S staff.

1. Turn main power of boiler OFF.

2. Close fuel V/V of oil tank.

3. Put a burner through disassembly at the

place where the work is done easily.

4. Put it on the stand.

5. Loosen two unions of copper pipe.

* If using two sets of spanner, the copper

pipe can be disassembled without any

damage.

* Since small amount of oil leak out of copper

pipe, cover it with a floorcloth.

6. Disassemble an burner cap bolt & nut.

Close

Fuel V/V of oil tank

Burner cap bolt & nut

Ignition plug cap Burner

CdS coll

Copper pipe union

Main power

RDon’t operate a boiler with wet hands, which

may lead to electric shock.

51

7. Disassemble a cap of ignition rod and pick

out CdS cell.

8. Detach a burner body and put it through

laying the floorcloth on the place where

handling is done easily and safely.

9. Move the working place together with the

floorcloth.

10. Remove the smokes attached to a baffle

plate and an ignition rod with a wirebrush.

11. Make sure that any crack, damage and

deformation in the baffle plate and the

ignition rod are present or not.

12. Loosen the bolt & nut of ignition rod with a

hexagon wrench.

13. Widen the ignition rod so that a nozzle chip

may be turned.

14. Pick out the nozzle chip through putting a

spanner on the nozzle adapter and turning

nozzle chip..

Ignition rodNozzle chip

Baffle plate

Nozzle adapter

Since an oil in nozzle chip comes out, cover it with

the floorcloth.

Nozzle chips are different in dimension respectirelywhen fitting, fit them only after cleaning their oneside to protect any confusion.Since an oil in fuel oil piping comes out, cover itwith a floorcloth.

52

15. Wash the smokes attached to a nozzle chip

with a floorchoth.

16. Make sure that any damage on the contact

surface of a nozzle chip and a burner is

present or not.

17. While checking the degree of regulations, fit

a nozzle chip and an ignition rod.

18. Assemble in reverse order when disassembling.

19. Make sure that a copper pipe and a union

are fully tightened or not.

Nozzle chip

Nozzle chipBaffle plate

Ignition rod

Ignition rod(1000K, 1500K, 1700SK : 5~8)

(100

0K, 15

00K,

170

0SK

: 15

)

(100

0K, 15

00K,

170

0SK

: 9±

1)

Contact surface

RIn case of damage, contact our A/S office. If

using in the state of damage it may cause some

fire or explosion by fuel leakage.

RMake sure that a copper pipe and a union are

fully tightened or not. If not, it may lead to some

fire, explosion, etc.

Clean the fuel eruption port at a vertical hem of

nozzle chip so that it may not be clogged with

the smoke and dust.

If tightening an ignition rod very strongly, it

cracks and loosening it very much its location is

out of place when picking into an ignition cord

so pay a lot of attention to tightening.

Ignition plug cap Burner

CdS coll

53

Cleaning of Cds cell

1. Turn main power of boiler OFF.

2. Pick out Cds cell.

3. Loosen the bolt & nut of flame eye cover.

4. Wash the smokes attached to the glass of

flame eye cover bottom with soft cloth

cleanly.

5. Make an assembly to the original state and

place Cds cell to the original location.

Bolt & nut

Cds cell

Flame eye cover

Glass

Packing

Main power

R

R

Since each part of boiler is hot directly after boiler stop, don’t operate the boiler until it

cools down fully(until about 2 hours after boiler stop). You may incur some scald.

In case of cleaning Cds cell, be sure to contact our A/S staff and clean it through following

the instruction by our staff.

RDon’t operate a boiler with wet hands, which

may lead to electric shock.

54

Air drain bolt & nut

TTiigghhtteenn

Cleaning of oil strainer

1. Proceed to「Operation / Stop」in chapter 8.

2. Loosen air drain bolt & nut on the top of oil

strainer and loosen drain plug.

*The water and the impurities inside oil

strainer are drained together.

3. When the water and the impurities in the oil

are removed, fit a drain plug.

4. Open fuel V/V of oil tank.

5. Loosen air drain bolt & nut on the top of oil

strainer little by little.

6. After checking that enly oil is leaked out,

tighten air drain bolt & nut.

Fuel V/V

Drain V/V plug

Oil strainer

Fuel V/V

CClloossee

OOppeenn

TTiigghhtteenn

Place a vessel so that an oil under oil strainer

may not be leaked out.

55

Analysis of water quality

Cleaning of oil tank

Do an analysis of water quality once per four months. The city water, underwater,

industrial use water change according to season. If neglecting the water quality analysis,

it may lead to the fall of boiler efficiency and the damage of water pipe. Our company,

Korea MIURA do the water quality analysis through introduction of modern adalysis

equipments. For it, contact on A/S office freely at any time.

1. Open drain V/V of the bottom of oil tank.

2. Check if the water and the impurities are in the

oil or not.

3. Close drain V/V of the bottom of oil tank.

Oil tank

Draining

Open Close

Place a vessel so that an oil in the bottom of oil

tank may not be leaked out.

56

Safety V/V

Adjust eruption pressure of safety V/V to the displayed value. In case small tolerence may takeplace, do not adjust it without paying a lot of attention to it.In case of sensing an abnormality, contact our A/S office.

For safety V/V inspection, please assign it to our repair & maintenance staff.

R Safety V/V requires a regular inspection. If neglecting it a danger such as some explosion andetc due to the trouble of the V/V may take place.

Water level gauge glass

For the water level gauge change, please assign it to our A/S staff.When sensing an abnormality such as a leakage and etc, contact our A/S office immediately.

RA water level gauge requires a regular change. If neglecting it a danger of accident by thedamage may take place.

57

Warning is to stop a boiler through informing any possible danger by means of a buzzer or alamp by judging that comtinuous combustion is dangerous.

RWhen a warning is generated the combustion is stoppedautomatically. Thereafter, post purge is proceeded.

RA buzzer rings, a warning lamp is flickered, andinformation contents are displayed accordingly.

1. Check if post purge is completed.

2. Push RESET S/W once.RA buzzer stops.

3. Pursuant to ̀ Remedy before request for repaira, removethe cause for warning occurrence.

4. Push RESET S/W once again.

5. Start a boiler in accerdance with ̀ Operation andStartingain chapter 8.In case same warning is generated repeatedly it may beother cause so contact our A/S office.

58

Alarm is to inform that continuous operation of boiler may cause any danger leading to warning.

RIn case of juding that continuous operation may causeany danger leading to warning while operatingcontinuously, the fire is proceeded as it is and operationis continued as well.

R̀ Alarmalamp is lit up.In case of alarm a buzzer does not ring.

1. Turn combustion S/W as OFF.

2. Push RESET S/W once.

3. Pursuant to ̀ Remedy before request for repaira, removethe cause for warning occnrrence.

4. Push RESET S/W once again.

5. Start a boiler in accerdance which ̀ Operation andStartingain chapter 8.In case same warning is generated repeatedly it may beother cause so contact our A/S office.

RThe sequence of removing the cause for alarmoccurrence shall be done as designated. Incorrectoperation may bring about a serious accident.

59

R

WARNING ITEMMISFIREFLAME OUTFALSE FLAMELOW WATER LEVELWATER LEVEL NOT DETECTEDHIGH WATER TUBE TEMPO.H.T.C FAULTFLAME DETECTEDPOWER FAILURELEAKAGE ELECTRICITYFAN TRIPWATER PUMP TRIPOIL PUMP TRIP

Check if fuel V/V is opened or not.Check if fuel V/V is opened or not.A remained flame is in the furnace. Check main V/V.Carry out cleaning and air drain of a water supply strainer.Check if a terminal of sensor is loosened or not.Carry out blow and check if a water level gauge is clogged or not.Check if a terminal of sensor is loosened or not.Check V/V is leaked out or not.Carry out RESET operation.Check if there is any wet instrument or not.Operate RESET according to the mannal.Operate RESET according to the mannal.Operate RESET according to the mannal.


In case of carrying out remedy of warning and alarm, be sure to turn boiler operation S/W asOFF and then do the work according to designated sequence accurately.In case abnormality is not removed even with carrying out as described in the remedy, stop aboiler according to ̀ Starting and Stopaand contact our A/S office without fail.Do not other work than designated one, which may lead to personal accident.

WARNING ITEMLEVEL SENSOR D FAULTLEVEL SENSOR S FAULTLEVEL SENSOR M FAULTSCALE T.C. FAULTBLOW TIME

SCALE BUILT UP

Check if a terminals of D ROD is loosened or not.Check if a terminals of S ROD is loosened or not.Check if a terminals of M ROD is loosened or not.Check if terminals of a sensor are loosened or not.Operate blow according to the manual.Inspect a water softener and water tube. For a large amount of scaleattachment, contact our A/S office without fail.


1. In case a warning is generatedRPush an operation instruction and then proceed to the work pursuant to the contents of theoperation instruction.

2. In case an alarm is generatedRPush an operation instruction and then proceed to the work pursuant to the contents of theoperation instruction.

60

1. Operate 1 to 5 in ̀ In case a buzzer rings and awarning lamp is lit upa.

2. Check electronic S/W in control box.

Fit in a reset button through pushing and check asetting value.

Fit in a reset button and check if main feed waterV/V in feed water tank is opened or not.

3. Start a boiler pursuant to the starting sequence.In case same warning is generated again, stop aboiler and contact our A/S office immediately.

RIn cas of working, be sure to turn main power asOFF. In case of operating main power, don't operateit with wet hands, which may lead to electric shock.

In case a RESET button for electronic S/W of fanmotor is protruded.

In case a RESET button for electronic S/W of feedwater pump is protruded.

AbnormalReset button

Normal

Trip rod

AbnormalReset button

Normal

61

RDo the work after a boiler cools down fully.(Longer than about 2 hours after stop)Each part of boiler is composed of hot temp.materials so pay careful attention to any possibleinjury such as a burn and etc. immedidtely afterstop of boiler.

2. Pick out an electrode rubber cap at top of electrodepreservation device and check a connection terminal.Thereafter, attach the electrode rubber cap to theoriginal location.

3. Start a boiler pursuant to the starting sequence.In case same warning is generated again, stop theboiler and contact our A/S office immediately.

1. Operate 1 to 5 in ̀ In case a buzzer rings and a warninglamp is lit upa

58page☞

Electroderubber cap

Electrodepreservationdevice

Connectionterminal

62

1. Operate 1 to 5 in ̀ In case a buzzer rings and a warninglamp is lit up.a

2. Turn main power as OFF.

3. Check if the water in cntrol box and its circumference isleaked or not and if so, wash it with dry cloth cleanly.

4. Start a boiler pursuant to the starting sequence.In case same warning is generated again, stop theboiler and contact our A/S office immediately.

57page☞

R

R

In case of working, be sure to turn main power asOFF.In case of operating main power, do not use wethands, which may incur an accident such as electricshock and etc.

RBe sure to use dry cloth since an injury such aselectric shock and etc. may take place.

64

Maintenance service

A letter of guarantee in this prodnct is not available. It will be handed over to you by our A/Sstaft after filling in the specified matters when starting a boiler so that you are kindlyrequested to keep it through checking them thoroughly.Guarantee period is one year from purchase day. Since some repairs shall be covered on chargebasis even within guarantee period, you shall consult our A/S staft for the repair and servicewithout fail.For the repair after guarantee period, consult the corresponding A/S office. If the functionworks normally through repair the repair will be treated on user’s charge basis.Contact our A/S office for the detailed matters and other problems on A/S.

MIURA BOILER MAINTENANCE PROGRAMMMP Inspeition is taken by a proficient engineer according to Inspection Result Report and theinspection items cover all of parts of boiler such as a burner, water supply system, tublar insidepart, etc.

Safety inspectionA large scale accident such as malfunction and etc. is likety to start from safety V/V so a regularinspection on each function shall be taken strictly.

Do you know a frequent inspection?For the boiler to be inspected legally pursuant to Energy Application Rationalization Act afrequent inspection to be made once a year by an inspection agency has been carried out to thefull responsiblilities.

Maximum prevention against stop of boilerThrough accurate inspection by modern measuring instruments the trouble is prevented inadvance to the maximum, thereby concentrating our efforts on the job successfully.

Maintaining boiler efficienyThe smoke, scale attachment, etc. cause a drop of boiler efficiency. Accurate inspection and timelyremedy enable to maintain high efficiency of boiler.

Use the convenient repair maintenance contract service.

65

Safety V/V inspection, tublar inside inspection, furnace pressuremeasurement, smoke and scale attachement condition and others.

Exhaust gas annalysis(O₂, CO₂, CO, temp.), burner inspection, oil P/P, electronicV/V, etc.

Water softener, chemicals injection system, feed water pump, low waterlevel isolation test, etc.

Consult our A/S office for further details.

Use rated product of leading maker for boiler chemicals.

Boiler mate KIM/KIS mostly suitable for mproving the feed water quality of boiler is new typecombined cleaning material.(Tube cleaning material, oxygen removing material, natural filmcreation mix.)

KOREA MIURA CO., LTD

System control over our mationwide offices bycomputerized

Repair & control office of MIURA BOILER

Main office: 701-1, Ace High-tech City 3, 55-20, Mulllae-dong 3(sam)-ga, Yeongdeungpo-gu, Seoul TEL. 02)2671-2410 FAX. 02)2671-0019

Call the key number with no area code andrequest after-sales service. Your nearestservice center will provide quick and thoroughservice.

This manual is published on recycled paper.

Miura boiler, reliable anytime and anywhere

Miura Korea aftersales center

MANUAL - 미우라보일러 · MANUAL Once-Through Boiler (oil fired) Please use Miura Boiler after...

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