Ariterm Multijet 500 Installation and operating instructions

INSTALLATION, OPERATION AND
MAINTENANCE
•Multijet 500-1500

2
TABLE OF CONTENTS:
FOR THE NEW OWNER 3
INFORMATION ABOUT THE BURNER 4
GENERAL 5
TRANSPORT, HANDLING AND STORAGE 6
INSTALLATION 7
MECHANICAL INSTALLATION 8
CONTENTS OF DELIVERY 9
INSTALLATION 10-14
INTRODUCTION INTO USE 16-17
OPERATION-RELATED RISKS AND WARNINGS 18
SERVICING 19
TROUBLESHOOTING 20-21
INSTRUCTIONS IN CASE OF EMERGENCY 22
TECHNICAL SPECIFICATIONS 23
HYDRAULIC SYSTEM 24
HYDRAULIC DIAGRAM 25
HYDRAULIC SPECIFICATION 26
500 - 1500 kW DIMENSIONS 27
500 kW INTERNAL PARTS EXPLODED VIEW 28
500 kW SURFACE PARTS EXPLODED VIEW 29
700 kW INTERNAL PARTS EXPLODED VIEW 30
700 kW SURFACE PARTS EXPLODED VIEW 31
1000 kW INTERNAL PARTS EXPLODED VIEW 32
1000 kW SURFACE PARTS EXPLODED VIEW 33
1500 kW INTERNAL PARTS EXPLODED VIEW 34
1500 kW SURFACE PARTS EXPLODED VIEW 35
PROPERTIES OF BIO-FUELS 36
WARRANTY 37
DECLARATION OF COMFORMITY 38
WARRANTY CERTIFICATE 39-41

FOR THE NEW OWNER
In this guide, we have compiled the key facts on installation, operation and servicing.
Ariterm Oy’s bio-burners have been designed to be easy to operate and reliable, and
risks such as burn back have been eliminated through the introduction of several safety
systems. By observing the instructions in this guide, your burner will achieve optimal
operation. e quality of fuel used also fundamentally affects the ease of use.
e model of burner and level of accessories are selected at the order stage to suit the
needs of the customer. ese instructions are a general guide to the Ariterm Multijet
range of products. Because of this, there may be differences between the burner delive-
red to you and these instructions, due to different power ratings. During the installa-
tion stage, situations may emerge for which these instructions do not provide a direct
answer.

4
INFORMATION ABOUT THE BURNER
Write here the model of burner, serial number, date of purchase and date of installation.
MODEL
SERIAL NUMBER / YEAR
DATE OF PURCHASE
DATE OF INSTALLATION
FUEL
INSTALLATION ENGINEER / INSTALLATION COMPANY
Enter the burner’s information into the table below. is will mean than we can act quickly for
servicing and repair.

5
GENERAL
Ariterm’s bio-burners meet the most up-to-date operational and safety standards for the bur-
ning of bio-fuels. The Multijet is a burner equipped with a moving grate which is installed in
the burner compartment of the boiler’s firebox. The burner grate is located entirely inside the
firebox.
An automation system controls the burner by feeding it fuel and combustion air. The air is divi-
ded through separate fans into primary and secondary air, and the fuel is gasified in the burner’s
grate. The feed system may consist of one of more feed augers and a fuel stoker. The augers and
stoker are selected according to the fuel being used. The movement of the grate can be separate-
ly adjusted to suit each kind of main fuel.
Between the augers in the multi-auger systems is a sensor, which monitors the fuel feed to the
burner. If a conveyor stoker is part of the equipment, the automation system also controls this.
When using pellets as fuel, no special control is required for the silo.
The burner’s automation system controls the equipment based on the boiler’s water temperature
which is measured by a PT-100 sensor (with 4...20 mA transmitter). With the Arimatic control
unit (AM200, AM1000 or AM2000), the burner can be maintained on constant partial power
settings and reverts to its inactive mode only when the power requirement falls below the mi-
nimum level. In normal operation, the automation system runs the burner based on the power
requirement at a level between 21% and 100%.
The equipment must have burn back protection. Such equipment varies depending on the fuel
and feed system selected. Please note that the fuel selected also affects other parts of the equip-
ment.
ALWAYS CHECK WITH THE PRODUCT SUPPLIER ON THE SUITABILITY OF
THE FUEL FOR YOUR BURNER!

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TRANSPORT, HANDLING AND STORAGE
The burner is packed at the factory for transportation and short-term storage. Depending on
the means of transport and place of storage, however, the package may require additional pro-
tection to ward off moisture, knocks, etc.
The burner is often part of a larger entity. If you are transporting the system by itself, in order
to avoid transport damage and for the sake of traffic safety it is important to tie the packages
together as well as possible and to secure them to the vehicle. The transport company is always
responsible for the correct loading and securing of the equipment.
Use caution when handling components in order to prevent damage.
The equipment can be stored in the open air if protected from rain and ground moisture. Long-
term storage, however, requires a better storage location. Storage indoors is recommended as the
equipment contains sensitive parts such as electric motors, sensors and a control unit.

7
MECHANICAL INSTALLATION
Receiving delivery and handling
When you receive the delivery, check that the contents correspond to your order and that the
final inspection report and list of accessories are included. If anything is unclear, contact the
seller immediately.
Before commencing assembly, it is advisable to read not only these burner installation and
operating instructions carefully but also the installation instructions for the boiler, automation
system and fuel stoker.
This means you can ensure in advance that, from a point of view of successful installation, the
main facts and measurements are all satisfactory. Please note: Keep all operating and installation
instructions in a safe place where you can easily find them when you need them, for example in
their own folder in the boiler room.
The parts of the Ariterm bio-heating system should always be installed by an expert and in
accordance with requirements. We recommend that you carry out installation in the following
order:
1. Put the boiler in position with the burner attached, and ensure that the pipes and flue are
not yet connected.
2. Put the conveyor or other fuel stoker in position.
3. Fit the augers between the stoker and burner.
4. It is advisable not to carry out the final precise positioning of the boiler and fuel stoker un-
til the suitability of the augers has been checked. In the TPYM stoker, the stoker is fitted
to the floor and is the checkpoint for the system.
5. Plumbing and electrical work is done last.
Requirements concerning the installation and operating environment
• e boiler room must be built in accordance with the relevant regulations (E9 Building
Regulations, further information available from your local fire authority)
• Air vent in the boiler room wall. Recommended surface area 5 cm2 / 1 kW
• Installation and operating temperature 0 – +40 °C
• e humidity of the boiler room should be 20 – 80 % (in order to prevent condensation)
Necessary connections
• Electrical supply through the control unit to the actuators and instrumentation
• Flue in accordance with the instructions for the boiler to be used. Remember that the
correct negative pressure is important for the system to function properly!
• Water for the automatic extinguishing system (a powder extinguishing system is recom-
mended if pellets are used as fuel)
• Installation of the power unit of the stoker conveyor
• Connecting the hoses of the power unit that move the grates of the Multijet burner to the
burner’s cylinders
Space requirement
Please note that there must be sufficient space for the burner and burner auger between the
boiler and boiler room wall. When planning, it is advisable to make allowance for the possible
dismantling of the burner and burner auger/motor for maintenance purposes (e.g. door open-
ings). We recommend a distance of at least 1 metre between the boiler and the wall on the sides
where sweeping and maintenance work will be carried out.

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MECHANICAL INSTALLATION
e system delivery usually also includes a boiler, burner auger, auger motor, automation system
and stoker. ese are selected based on the type of fuel and fuel stoker being used.
Installing the burner in the boiler
e burner can be installed in a solid fuel boiler, the power rating of which corresponds to the
power of the burner. e negative pressure required for the reliable and correct operation of the
burner (25-30 pa in the firebox) can be ensured either by a correctly dimensioned chimney or a
negative pressure-controlled flue gas extractor.
We recommend that compatibility with anything other than an Ariterm boiler is checked by the
burner manufacturer.
e burner is fixed by its flange to the boiler with bolts and the seam is sealed with heat-resis-
tant silicon (1). e joints must be sealed so well that they are completely air-tight! e bolts
are tightened diagonally. If the boiler opening and burner flange are of different sizes, for the
purposes of installation, a suitable installation flange must be made.

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CONTENTS OF DELIVERY
Power
Nr. Part 500 700 1000 1500
1Multijet burner 1 1 1 1
2Hexagonal screw M12x25 for burner fastening 16 16 16 16
3Washer M12 16 16 16 16
4Burner pipe for pellets or chips, incl. limit switch 1 2 2 2
5Cleaning (typo) 1 1 1 1
6Pipe packing 1 2 2 2
7Heatproof silicone, tube 1 1 1 1
8Pellet pipe adapter (only for pellet use) 1 2 2 2

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INSTALLATION
Installing the burner auger
1. After attaching the burner, the fireproof burner pipe is inserted into the burner’s feed
opening.
2. The feed auger is inserted into the burner pipe.
3. The burner auger pipe and gasket are installed into the burner auger with fastening bolts.
4. The depth of the feed auger is adjusted so that the head of the feed auger extends 0 to 10
mm past the level of the burner’s back wall.
5. The seam between the burner tube and burner head is sealed with heat-resistant silicon
from the outside.

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INSTALLATION
Installation of other equipment
1. Three to six combustion air fans are ready installed on the burner, depending on its size.
The attached table lists the models of different burners and the number of fans in each
with data about their motors. For example, the Multijet 700 burner has two primary fans
(Sodeca CMP-514-2T) and one secondary fan (Sodeca CMP-718-2T).
2. The displacement limit is installed between the burner and burner auger so that switch 2
cuts the current if displacement occurs between the auger and burner. The switch is fitted
with the aid of an installation support (8). Finally, install the switch counterpart (9).
3. Moving the burner grate is operated hydraulically. The burners MJ500, MJ700 and
MJ1000 have four hydraulic cylinders and the MJ1500 has six. The hydraulic cylinders are
always in pairs. For example, the MJ700 burner has two cylinders on top and two at the
bottom. Each cylinder is equipped with four inductive limit switches. The system’s logic
controls the cylinders based on information from the switches. For more information on
the installation and operations of the power unit, see the chapter POWER UNIT.
Electrical installation
The wiring diagrams for the burner’s electrical equipment can be found in the automatic control
unit instructions.
ELECTRICAL INSTALLATION MUST ONLY BE CARRIED OUT BY A QUALIFIED ELECTRICIAN!

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INSTALLATION
Powder extinguishing system
• e powder extinguishing system consists of a bottle (+ spare bottle), a valve, extinguishing
hoses and a red plastic sensor pipe.
• Install the 3 hoses of the system between the powder extinguisher, auger pipe and interme-
diate tank units.
• Install the red sensor pipe in the powder extinguisher unit and tighten it. Install the other
end of the pipe under the visor located on the auger pipe surface (see figure).
• PLEASE NOTE! Open the extinguishing bottle slowly and in several stages to ensure the
even distribution of the sensor pipe gas pressure and prevent the content of the bottle from
being discharged by accident.
• When heated, the pipe melts and breaks. is releases the pressure that keeps the extin-
guishing bottle valve closed. e sensor pipe can be used again after cutting off the melted
part. Install the sealing plug again.
• PLEASE NOTE! e powder extinguishing system is an accessory. When using pellets as
fuel, it is recommended to replace the water extinguishing system with a powder extinguis-
hing system.
• Install the red hose filled with gas so that, when overheated, it melts and discharges the
powder extinguishing device. e powder penetrates into the burner auger and puts out
the fire.
• e bottles must be replaced and refilled during factory maintenance.
Installation of safety systems guarding against burn back
The Ariterm bio-burner must be equipped with an extinguishing system to prevent burn back.
To ensure safe use of the equipment, it is important to install all extinguishing systems before
the equipment is started.
If the burner has two feed augers (MJ700-1500), separate safety equipment must be installed in
both feed augers.
The extinguishing systems are as follows (a-d):
a. Connecting the AVTA safety valve to the water supply system (wood chip-burning
systems)
• The Danfoss AVTA15 (50–+90 °C) thermostat valve (1) is connected to the burner auger
pipe and intermediate tank. The valve sensor is manually pushed above the sensor pocket
(2) (see picture), and the valve is connected to the water supply system. In order to avoid
possible network pressure loss, you can fit an expansion tank (4) equipped with a non-
return valve and a pressure warning gauge (PIA).
• Through manual override, the water can be sprayed into the fuel system manually.
• The AVTA valve must be adjusted to about 80 °C (on scale no. 4).
Please pay attention to the installation instructions for the valve sensor!
• The burn back thermostat sensor and AVTA valve sensor are each installed in their own
sensor pocket on the surface of the auger pipe. Please note that the sensors must be tight
against the auger pipe housing. If necessary, use heat-conducting material or screws. The
screws must not, however, damage the sensor! The burn back thermostat is connected to
the burner’s automation system. The AVTA operates on water pressure.

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1
32
5
4
INSTALLATION
b Pulse-controlled extinguishing system connected to the water supply system
• The magnetic valve pipe (5) is connected to the feed auger pipe. The valve is controlled
by the Arimatic automatic control system. The pulse-controlled burn back protector is
adjusted to a temperature of 60 – 70°C, where it operates before the AVTA valve. SEE
OPERATING INSTRUCTIONS SECTION 12 – PULSE EXTINGUISHING
• The operation of the magnetic valve during power cuts can be ensured using UPS equip-
ment.
• Possible loss of supply pressure can be avoided by installing an expansion tank and pressure
warning gauge (PIA).
• The sensor of the pulse-controlled burn back system is installed close to the burner head
so that it is tripped first.
• The pulse-controlled burn back system is no substitute for an AVTA or powder extinguis
hing system!

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6
7
PLEASE NOTE! We recommend that
water-powered extinguishing systems are
fitted with a 50-litre membrane expan-
sion tank (RST), non-return valve and
pressure warning gauge. This means that
a possible drop in supply pressure does
not jeopardise the operation of the safety
equipment.
c. Burn back thermostat
• e burn back thermostat sensor is installed in the burner auger pipe, under the visor
beside the AVTA sensor. In a burn back situation, the automated system extinguishes the
combustion air fans and stops all operations in the stoker. e fuel in the burner auger is
driven to the burner head. After this, the burner auger also stops. e automation system
maintains flue gas extractor operation. Adjustment range 60-70 °C.
d. Other safety systems
• A shut-off valve is fitted from the water supply system through which the user may draw
water manually into the feed auger and hopper.
• A fire alarm monitoring the fuel stoker temperature can be fitted as an option.
4. AVTA system extinguishing pipe
5. AVTA system temperature sensor
6. Pulse-controlled system temperature sensor
7. Pulse-controlled system extinguishing pipe
INSTALLATION

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INTRODUCTION INTO USE
INTRODUCTION INTO USE
Operational testing
e operation of the equipment is tested before use as follows:
Start the motors (augers and fans) one at a time and check the following:
• directions of rotation of the augers
• operation and direction of rotation of the combustion air fans and flue gas extractor
• countermanding of fuel augers
• pump operation
• check the direction of rotation of the pump of the power unit
• operation of moving grate
Check the safety equipment
• Adjust the tripping temperature of the burn back thermostat to a level low enough to set
off an alarm.
• Turn the thermostat of the AVTA valve so that it trips and check that the nozzles are
open. Please note that this may create a large volume of water, and we recommend that you
direct it into a separate receptacle.
• Adjust the tripping temperature of the pulse-controlled burn back thermostat to a level low
enough that it trips.
• If necessary, carefully heat the sensors.
• Check the over-heat protection, boil-dry protector and other connected safety equipment.
• Check the alarm function and that a remote alarm is set off, if it has been connected
Read the operating instructions for the automatic control system before starting the system!
Adjustment
e burner and boiler should be run slowly up to operating temperature in order to minimise
the heat stress on the structures. Automatic control should be shut off and a suitably low power
level selected while the temperature is rising (about 1 hour).
Once the burner and boiler have been warmed up, the burner must be adjusted for clean and
economic operation. An experienced burner operator can adjust the burner visually. e flame
must be pale yellow and combustion must be even. Precise adjustment, however, requires the
use of a flue gas analyser and this is recommended.
e excessive movement of fuel in the grate can be reduced by restricting the movement of the
grate. If ash sticks to the grate, increase its movement.
Target values for combustion
Oxygen (O2) 7-9%
Carbon monoxide (CO) 100-400 ppm, chip
Carbon monoxide (CO) 50-200 ppm, pellet

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e temperature of the flue gas does not have a direct impact on combustion, but it has a sig-
nificant impact on overall efficiency. At low power settings, the fan power must be sufficiently
great to ensure that the burner’s air ducts stay clean. e above-mentioned guidance values can
then be exceeded.
e quantity and consistency of the ash is a good indication of the cleanliness of combustion. A
large amount of ash or ash mixed with unburned substances is a sign of impure combustion.
PLEASE NOTE! The quantity of ash can uctuate up to ten times depending on the fuel selected!
e lower burner fan acts as a primary air fan. Adjusting the primary air adjusts the power of
the burner. Fine adjustment of the secondary air fan adjusts combustion. Burners of 150 kW or
more have two primary air fans.
PLEASE NOTE! Any changes to the settings will take at least a couple of minutes to take effect.
Adjustment tips
• If too much unburned fuel has accumulated on the grate and/or in the ash, the feed rate of
fuel to the burner auger should be cut and/or the fan revolutions increased. e movement
of the grate should be shortened.
• If the tip of the flame is black and the boiler is getting dirty quickly, the secondary fan
revolutions should be increased and/or the fuel feed rate cut.
• If the flame is bluish and burns unevenly, the secondary fan revolutions should be reduced.
• If the fuel includes lightweight particles, some of them may fly out of the burner with
airflow before the fuel has burned completely. is is evidenced by sparks in the firebox
and increased ash production. Some of this fly-out can be avoided by reducing the air flow
(fans).
• When the fuel or its consistency changes, the settings must be readjusted.
• At low power settings, depending on the fuel being used, it is possible to ventilate the
combustion air openings in the burner and prevent them from clogging. In that case, the
adjustment value of the primary air blower must be raised, then the increased airflow keeps
the holes open.
Please note! For the adjustments to be made, the equipment should be run with an almost full
load. An under-loaded boiler reaches its set temperature quickly and the burner moves into
an inactive stage, so the time required for adjustment can easily be too short. If the boiler is
introduced into use in the summer (under-loaded), it should be re-adjusted as soon as it can be
properly loaded.
Burner shutdown
e fuel in the burner, burner auger and intermediate tank must be burned away before the de-
vice is shut down. e shutdown function in Arimatic automatic systems can be activated from
the USE menu. is function stops the operations of the stoker auger and stoker conveyor (if in
use). Other functions of the system continue to work normally and will stop at the flame control
alarm when the fuel in the burner auger and hopper has burned out.
PLEASE NOTE! Ensure that the fuel is completely extinguished before you leave!
INTRODUCTION INTO USE

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OPERATION-RELATED RISKS AND WARNINGS
Information about risks concerning operation
In a burn back situation, the fire has spread from the burner to the burner auger. Preventive
measures:
• e firebox of the boiler must constantly have sufficient negative pressure, even during
combustion
• e automatic extinguishing systems must always be kept in operating condition
• is risk can be minimised in design by making the burner auger sufficiently long for the
safety systems to have time to trip in a burn back situation
• A short (< 1,000 mm) burner auger requires a fire-resistant fan-wheel lift for permanent
burn back protection.
• Fill the fuel tank in good time before the fuel runs out, so that the airflow cannot be sent
off in the wrong direction.
• is solid fuel heating unit always generates heat, even when it is in inactive mode.
• Do not keep the unit running, if there is insufficient need for heat.
• A risky situation develops when the unit is kept running when it is under-loaded: these
risks include burn back, corrosion of the boiler and reduced efficiency.
• Before you open the boiler hatches or begin servicing the boiler, switch off the automatic
sweeping!
• Use hearing protection!
• Do not open the boiler hatches during a power failure. Danger of carbon monoxide explo-
sion!
• Check whether there is a healthy flame in the burner before opening the hatches. If not, air
the boiler by raising the revolutions of the flue gas extractor for about two minutes prior to
opening the hatches.
Injuries caused by power transmission or fuel stoker moving parts
Preventive measures:
• Always keep the covers of mechanical moving parts in place during operation.
• Always turn the power off at the mains before carrying out servicing on the equipment.
• Do not open the fuel tank when the equipment is running.
• Safety switches must be installed in motors, pumps and fans. PLEASE NOTE! EMC
safety switches must be used in frequency converter-controlled motors!
Exposure to harmful dust
Preventive measures:
• Do not use wood chip that has gone mouldy.
• Re-fill the tank in good time before the fuel runs out
• Use a breathing mask.
WARNINGS!
• Do not enter an unventilated fuel stoker. The enclosed space can be oxygen-free and so highly
dangerous. Do not work alone in the fuel stoker.
• BEWARE OF THE HOT BURNER SURFACES! The burner is insulated, but certain steel parts are
connected to the burner ange and so may be hot.
• THE SAFETY SWITCH MUST BE LOCKED OPEN DURING MAINTENANCE WORK!!
• THE EQUIPMENT MUST NOT BE USED UNTIL IT HAS BEEN FULLY INSTALLED, THE SAFETY
EQUIPMENT HAS BEEN TESTED AND CERTIFIED AS FUNCTIONAL, AND THE OPERATOR HAS
BEEN TRAINED IN ITS USE AND UNDERSTANDS HOW TO OPERATE IT CORRECTLY.
• THE EMERGENCY STOP BUTTON DOES NOT STOP THE FLUE GAS EXTRACTOR IN ARIMATIC
AUTOMATIC SYSTEMS
• NEVER INSERT YOUR HANDS INTO THE HOPPER HATCH – THE HOPPER’S LIMIT SWITCH DOES
NOT STOP THE BURNER AUGER IN ARIMATIC AUTOMATIC SYSTEMS

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Maintenance and inspection
PLEASE NOTE! Cut power to the equipment before starting repair or maintenance work!
In order to guarantee fault-free operation and a long service life, the following maintenance
procedures must be carried out:
SERVICING
Procedure Interval
Lubrication of feed auger bearings during first use Twice a year
Operational testing of flame control thermostat
Raise the setting value of the thermostat until an alarm is set off Twice a year
Operational testing of burn back thermostat
Lower the setting value of the thermostat until an alarm is set off Twice a year
Operational testing of AVTA valve
Immerse the sensor in hot water (°C over the setting value) until the valve opens
Recommendation: disconnect the water pipe from the burner auger and interme-
diate tank and direct the water down a floor drain, for example.
Twice a year
Operational testing of pulse-controlled burn back protector. Adjust the settings
value to a lower temperature until the magnetic valve opens.
Recommendation: disconnect the water pipe from the burner auger and direct the
water down a floor drain, for example.
Once a year
Check that the powder extinguisher system bottle is pressurised. Weekly
Check that the use-by date on the bottle has not expired. Weekly
In principle, the fan motors do not require servicing. The auger motor gearboxes are
lubricated for life.
Other devices installed in the equipment in accordance with the relevant instruc-
tions
Burner cleaning Interval
Inspection of condition of grate surfaces and ceramics. Twice a month or, if necessary
Checking and cleaning the bottom of the grate.
This operation must be carried out, otherwise petrified ash will prevent moving grates from functioning and the grate actu-
ating mechanism will break. The warranty does not cover damage resulting from faulty servicing.
Twice a month or more often if necessary:
• Open the end service hatches (8) and remove one of them along with its fans.
• Remove the ash accumulated under the moving grates with a vacuum cleaner or a strake.
• Make sure that all rammers can move freely and close the hatches.
Operational inspection of the spindle motor and fans Once a month

20
Malfunction Cause Action
The safety apparatus has stop-
ped the equipment.
The motor guard has tripped
owing to excessive resistance.
Remove the obstacle preventing mo-
vement of the auger by turning the
auger backwards and check that the
auger turns freely. Reset the alarm.
The motor guard has tripped
owing to lack of phase.
Check the power supply. Reset the
alarm.
The boiler or burner head over-
heat protection has tripped as a
result of boiler overheat.
Find out the reason for the overheat
Remove the causes of the malfunc-
tion. Reset the overheat protection.
Reset the alarm.
The flame control thermostat has
tripped because the flue gas tem-
perature has fallen below the set-
tings value.
Check fuel feed: Restart the unit. If
necessary, reduce the flame control
thermostat settings value.
The burn back thermostat has
tripped because the surface tem-
perature of the auger pipe has ri-
sen above the settings value.
Find out the causes of the burn back.
Start up the unit if it is safe to do so.
If necessary, change the adjustment
values (e.g. the temperature of the
unit may cause a false alarm).
The AVTA valve has tripped
owing to auger pipe overheat,
and has filled the intermediate
tank with water.
Drain the water out through the drain
hole in the bottom of the water tank.
Send the wet fuel through the burner
head to the ashbox. Feed dry fuel into
the burner head and start the unit.
The displacement limit has trip-
ped because the boiler or burner
auger has been displaced.
Remove excess fuel from the boiler
and burner. Check the pipe- and other
connections of the unit as well as the
operation of the flame control.
The limit switches of the hatches
have tripped because one of the
hatches was open.
Find out the reason for the tripping.
Shorten the conveyor operating time.
Check the operation of the intermedi-
ate tank photocell.
The flue gas extractor has stop-
ped.
Find out the cause of the malfunction,
in the power supply or the frequency
convertor.
Instructions when malfunctions may arise
TROUBLE-SHOOTING