KULJETUS, KÄSITTELY JA VARASTOINTI
Arimatic 200
User Manual
ARIMATIC 200 .................................................................................................................................................................................. 1
USER MANUAL................................................................................................................................................................................ 1
1 OVERVIEW .................................................................................................................................................................................... 3
2 OPERATING THE SYSTEM ....................................................................................................................................................... 3
2.1 BOILER .................................................................................................................................................................................... 4
2.2 SAFETY DEVICES ................................................................................................................................................................. 5
2.3 SETTINGS............................................................................................................................................................................... 7
2.3.2 CLOCK ................................................................................................................................................................................ 7
2.3.3 TEMPERATURE SETTINGS ............................................................................................................................................... 8
2.3.4 EFFECT SETTINGS........................................................................................................................................................... 9
2.3.5 RECIPES .......................................................................................................................................................................... 10
2.3.6 OXYGEN REGULATOR................................................................................................................................................... 11
2.3.7 STORAGE ........................................................................................................................................................................ 12
2.3.8 ASHSCREWS .................................................................................................................................................................... 13
2.3.9 SWEEPER SETTINGS ...................................................................................................................................................... 14
2.3.10 SAVE SETTINGS ............................................................................................................................................................ 15
2.3.11 HIDE/SHOW EXTRA SETTINGS ................................................................................................................................... 15
2.3.12 FLAME SUPERVISION ................................................................................................................................................. 16
2.3.13 BACKFIRE PROTECTION ............................................................................................................................................ 16
2.3.14 EXTINGUISHING ......................................................................................................................................................... 17
2.3.15 GRATE ........................................................................................................................................................................... 18
2.3.16 EXHAUST FAN .............................................................................................................................................................. 18
2.3.17 OPTIONS ....................................................................................................................................................................... 19
2.4 OPERATION ......................................................................................................................................................................... 20
2.4.1 MANUAL OPERATION ................................................................................................................................................... 20
2.4.2 AUTOMATIC ................................................................................................................................................................... 21
2.4.3 SHUT-DOWN ................................................................................................................................................................... 21
2.4.4 ON/OFF-MODE IN USE / OUT OF USE ........................................................................................................................ 21
2.4.5 STOP ................................................................................................................................................................................ 21
2.5 START UP ............................................................................................................................................................................. 22
2.5.1 MANUAL IGNITION ........................................................................................................................................................ 22
2.5.2 MANUAL IGNITION WITH THE HOT AIR GUN ........................................................................................................... 23
2.5.3 AUTOMATIC IGNITION (optional accessory) ................................................................................................................ 24
2
1 OVERVIEW
The Arimatic 200 control center is designed for controlling the 40–500 kW bio heating
systems supplied by Ariterm Oy. The control center is excellently suited for the HakeJet,
Biojet and MultiJet burners, amongst others. Special attention has been given to designing
the control center so that it not only allows the user to control the burner but also to
flexibly introduce several extra options to the system.
This manual describes the basic operating principles of the automated controls of a bio
heating system, as well as the key things to bear in mind when operating the system. The
control center is based on programmable logic. The user interface of the control center
comprises a graphical operating panel (touch screen).
References to a specific menu or a certain parameter on the control panel are given in
italics, e.g. FUNNEL’S FILLINGDELAY.
Starting up the system (i.e. igniting the burner) is described in section 2.5.
2 OPERATING THE SYSTEM
The graphical user interface makes the system easy to operate. The user interface is
divided into four main menus between which the user can change using the buttons at the
bottom of the screen. The bar at the top of the screen remains visible in all menus and
shows the date, the time, the name of the active menu, the status of the burner, the water
temperature in the boiler, and the percentage of power output in use for the burner. The
control panel is operated by touching the active fields on the screen.
All of Ariterm Oy’s bio heating systems share the same basic operating principles. The
control logic has readiness for several extra options that improve the usability of the
system. The control automation software is designed to work with both pellet-based and
woodchip-based systems, although the storage automation for the two is different. When
the system is first set up, the user must select which type of fuel will be used and which
extra options will be enabled.
The initial set-up takes place under SETTINGS → OPTIONS1 and OPTIONS2 on the control
panel. The initial set-up determines which menus of the control panel will be available to
the user and which options will be enabled.
3
PLEASE NOTE: THE INITIAL SET-UP MUST BE COMPLETED BEFORE
STARTING UP THE SYSTEM!
PLEASE NOTE: THE CONTROL CENTER IS ALWAYS MADE TO ORDER. THE
CENTRES DO NOT INCLUDE COMPONENTS FOR ADDING EXTRA MOTORS,
FOR EXAMPLE!
2.1 BOILER
The BOILER screen gives the user an overview of the system’s status:
- The burner status is shown at the top of the page. The screenshot above shows the
EFFECT RUN mode (EFF. = power output = 21–100%). The other modes are UPKEEPING
(power output = 20%), MANUAL and POWER CUT.
- Water temperature in the boiler
- Percentage of power output in use
- Revolutions of the primary and secondary fans
- Oxygen level in the flue gas (if the oxygen measuring equipment is included to system
and has been enabled in OPTIONS1 -menu)
- Flame status (when the flue gas sensor detects a flame in the burner, a picture of a flame
will be displayed inside the boiler)
- Status of the automated sweeper function (if the sweeper system has been enabled)
- Flue gas temperature (if the flue gas temperature sensor has been enabled)
4
- Surface temperature of the feed auger (if the feed auger temperature sensor has been
enabled)
- The ‘strength’ of the flame (if optical flame control has been enabled)
Any changes to settings relating to the operation of the system must be made under
SETTINGS.
2.2 SAFETY DEVICES
The status of the safety devices/alarms connected to the control logic is shown under
SAFETY DEVICES. A line next to the component name indicates that an alarm is active.
When a plus sign precedes the name of the component, the alarm is inactive.
If the system identifies a fault, the word ALARM! will appear in the top left corner of the
screen. Press this button to open the ALARMS -menu. Investigate and eliminate the cause
of the fault, and then reset the alarm using the RESET -button. The system will resume
normal operation. The screenshot shows the control panel after a power cut, which is also
indicated in the burner status field.
5
The ALARMS screen shows a list of all active alarms in chronological order. Thanks to the
timed entries, the user can easily tell which of the alarms was activated first, which may
help to identify the cause of the fault. If several alarms are listed, the user can scroll up and
down using the arrows to the right of the screen.
Previously reset alarms can be browsed under HISTORY.
6
2.3 SETTINGS
The submenus listed under SETTINGS depend on which properties have been enabled
under OPTIONS. The following submenus are nevertheless always visible: ALARMS,
CLOCK&LANGUAGE, TEMP.SETTINGS, EFFECT SETTINGS, STORAGE, SAVE SETTINGS
and HIDE/SHOW EXTRA SETTINGS.
2.3.2 CLOCK & LANGUAGE
To set the time and date, fill in the six fields under CLOCK. To accept changes, click on
CONFIRM.
DD = day
MM = month
YY = year
HH = hours
MM = minutes
SS = seconds
7
2.3.3 TEMP.CONTROL
The value entered into the SETTING VALUE FOR TEMP. field is the water temperature that
the PI-controller, which regulates the burner power output, strives to maintain in the boiler.
The HYSTERESIS -setting determines the margin after which the burner will switch to
standby mode (power output = 20%). For example, if the SETTING VALUES FOR TEMP. is
80 °C and HYSTERESIS is set at 5 °C, the burner will go to standby when the temperature
exceeds 85 °C. Once the temperature has dropped by 0.5 x the set HYSTERESIS value (i.e.
in this case 2.5 °C), the burner will switch back on (power output = 21%).
The right-hand side screenshot shows how the user can set a target value for the water
temperature in the boiler. The maximum water temperature setting is 100 °C.
In normal use the burner’s power output is regulated automatically by demand. The power
output range is divided into 1% gradients and varies between 20% and 100%. The burner
can also be operated at a fixed power output. The power output percentage is entered into
the EFFECT REGULATION field and the AUTO/MAN setting is switched to MAN. In this mode
the burner maintains the set power output percentage whenever it is on, and alternates
between power on and standby.
The EFFECT INCREASINGTIME allows the user to limit the speed at which the power output
of the burner can increase. The setting determines how many seconds must pass at a
certain power output level before the power output percentage can increase again.
The P and I parameters control the speed and accuracy at which power output is regulated.
These parameters can be hidden using the HIDE EXTRA SETTINGS -button.
The TRENDS -button opens a page that shows any changes in the power output and water
temperature in the last hour or 24-hour period. This tool is especially useful when the
system is first started up, as the power output parameters may need to be adjusted.
8
2.3.4 EFFECT SETTINGS
The control logic regulates the boiler’s power output by adjusting the fuel feed rate. The
power setting is based on a PT100 -sensor, which measures the temperature of the water in
the boiler.
The control logic software is divided into 80 power gradients (21–100% + standby). The
settings on the control panel determine the basic parameters for the length of the pulse
and the length of the pause between the pulses of the feed auger, and the revolutions of
both the primary and secondary fans (0–100%). These are divided into four power ranges
(21%, 50%, 75% and 100%). Parameters are also set for the feed rate and fan revolutions
during standby (UPKEEPING). The logic software uses these basic parameters to calculate
the gradients in between (e.g. 22%, 23%, 24%, 25%, etc.).
Before start-up, put in right settings for SPEED-%. These feeding values depend on
concerned burner type, measurements of burner screw and fuel. Basic effect setting tables
are in Appendix 1.
As an example Biojet 500 burner for pellets (diameter of burner screw pipe is 114mm).
9
2.3.5 RECIPES
RECIPES-button on EFFECT SETTINGS page gives an access to tool, which make possible
the saving of recipes and re-using earlier saved settings. Left/right-arrows are used for the
browsing of saved recipes. It’s possible to save six recipes.
10
2.3.6 OXYGEN REGULATOR
The oxygen level in the flue gas is measured with an oxygen sensor (optional accessory).
To use the oxygen counter, enter a O2/DESIRED VALUE under 02- REGULATOR. The
recommended level of oxygen is around 8%. The level of oxygen remaining in the flue
gases is shown under BOILER on the control panel. When the oxygen counter is in use (O2CONTROLLER IN USE), it regulates the operation of the secondary fan, and as a result, the
fan’s set values will not be shown under EFFECT SETTINGS. If O2-CONTROLLER NOT IN
USE, O2-measuring doesn’t control secondary fan, but oxygen-value is seen on BOILERpage.
The parameters under EFFECT ON SECONDARY FAN determine the extent to which the
oxygen counter is allowed to regulate the operation of the secondary fan. The purpose of
these parameters is to ensure that the secondary fan does not stop completely when power
output is low, and that the fan’s revolutions cannot get too high if the sensor becomes
dirty.
The additional PI-parameters control the speed at which oxygen levels can be regulated.
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.
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. This is evidenced by sparks in the firebox and
increased ash production. To prevent this from happening, the volume of airflow can be
lowered (fans).
PLEASE NOTE: Any changes to the settings will take at least a couple of minutes to take
effect.
PLEASE NOTE: When the consistency of fuel changes, the settings must be readjusted.
11
2.3.7 STORAGE
STORAGE ALARM TIME DELAY: If the photocell (in a woodchip-based system) or the
capacitive sensor (in a pellet-based system) has not reacted to the rising fuel level in the
hopper when the stoker auger has been running for a certain period of time, the control
logic will issue a storage fault alarm.
FUNNEL’S FILLINGDELAY: The fuel level at which the stoker auger begins to refill the
hopper is determined on the basis of the running time of the feed auger (combined running
time of the augers based on the length of the pulses). When the computed time limit is
reached, the stoker auger will start up and run until the level of fuel in the hopper reaches
the photoemissive cell/capacitive sensor.
FUNNEL’S OVERFILLINGTIME: The stoker auger can be configured so that it continues to
run for a set period of time after the fuel level in the hopper has reached the photoemissive
cell/capacitive sensor. This can help to eliminate false alarms resulting from coarse
woodchips, for example.
FUNNEL’S FORCEFILLING DELAY: If the fuel level in the hopper does not appear to be
going down even though the feed auger has been running for a set time, the stoker auger is
turned on for a couple of seconds (FUNNEL’S FORCEFILLING TIME).
12
2.3.8 ASHSCREWS
OPERATIONTIME 1 IN USE/NOT IN USE: The user can specify four times of the day when
the ash removal augers will be activated. To activate the set times, click on the button to
replace the text NOT IN USE with the text IN USE.
ASHSCREW RUNNINGTIME : The ash removal augers can be set to run for a specific period
of time.
RUNS WHEN SWEEPING IN USE/NOT IN USE: If the automated sweeper function is
enabled, the ash removal augers can be set to run during the sweeper cycle also. The user
can specify up to eight different times of day for when the sweeper function will be
activated.
13
2.3.9 SWEEPER SETTINGS
The pneumatic sweeper system is activated under OPTIONS 2 -menu, which is accessed by
scrolling down the page under OPTIONS 1.
The NUMBER OF SWEEPING VALVES parameter determines how many of the sweeper
system’s pneumatic nozzles are in use.
The PULSE LENGTH parameter determines the length of the stroke of each of the nozzles.
The recommended value is 350 ms.
The INTERVALTIME parameter determines the length of time that elapses between the
pneumatic strokes of the nozzles. The time depends on the charge-up time of the system’s
pneumatic compressor. Usually this time is between 60 and 120 seconds.
SWEEPING:
SWEEPER CYCLE 1–8 IN USE/NOT IN USE: The user can specify up to eight different times
of day for when the sweeper function will be activated.
14
2.3.10 SAVE SETTINGS
Any changes to the system settings should ideally be stored in the system’s permanent
memory. Otherwise the settings will remain in the battery-powered memory for around one
week. If the control logic and panel are without power for longer, the settings will be lost.
Saving the settings takes approximately 10 seconds.
2.3.11 HIDE/SHOW EXTRA SETTINGS
The user can choose to hide settings that are critical to the safe operation of the system or
that are only needed temporarily during start-up or troubleshooting. To restore these
settings in the menu, the system requires a password, which is ‘USER’.
15
2.3.12 FLAME SUPERVISION
The flame status is based on the temperature of the flue gases, which is taken with the help
of a capillary thermostat. The system does not issue flame status while the burner is on
standby. The flame status information is overridden for a set period of time (FLAME
STATUS DELAY) when the system first starts up or when the burner switches from standby
(power output = 20%) to ON (power output = 21–100%). The delay gives the temperature of
the flue gases a chance to rise above the thermostat’s setting. The thermostat is activated
by switching its status to IN USE under EXTERNAL THERMOSTAT.
2.3.13 BACKFIRE PROTECTION
A thermostat also measures the surface temperature of the feed auger. If the auger’s
temperature exceeds the thermostat’s setting, the feed auger is switched on for the period
of time specified under BURNER SCREWS’ EMPTYING TIME to allow any fire creeping back
along the auger to be pushed forward towards the firebox.
16
2.3.14 EXTINGUISHING
The pulse extinguisher is designed to prevent backfire by moistening the fuel with water
when a set auger temperature is exceeded. The user can configure two temperature limits
at which the extinguisher will be activated.
When the first temperature limit (LEVEL 1 TEMPERATURE) is reached, a magnetic valve will
operate the pulse extinguisher for the period of time specified under LEVEL 1
EXTINGUISHING PULSE , followed by a pause as specified under LEVEL 1 PAUSE TIME.
This cycle will be repeated until the temperature has dropped below the set limit. If the
temperature continues to rise despite the level 1 extinguisher cycle, the level 2 extinguisher
cycle will be activated.
PLEASE NOTE: The water-based pulse extinguisher cannot be used with pellets!
17
2.3.15 GRATE
The grate in the MultiJet burner is operated by means of a linear actuator, which in turn is
controlled with the help of three internal limit switches. The actuator operates cyclically.
The length of the active pulse and the pause between the pulses is adjusted according to
the power output of the burner. A short pulse is mostly used on both sides of the limit
switch that determines the middle point of the movement. Once the number of these pulses
reaches the figure entered under COUNTER/SHORT MOVE, the actuator will run one long
pulse between the extremes of the movement.
2.3.16 EXHAUST FAN
18
2.3.17 OPTIONS
The OPTIONS menus display the functions that are enabled in the system.
19
2.4 OPERATION
The OPERATION menu allows the user to select how the system is controlled.
2.4.1 MANUAL OPERATION
The system should be run manually when it is first started up or when it is being serviced,
for example. During manual mode, the user can control the following functions:
- Running the screws forward/back
- Turning the fans on/off; when the fans are on, the user can set the revolutions for both the
primary and secondary fan by clicking on the -/+ buttons; the revolutions decrease/increase
by 5% each time the user clicks on the button
- Turning the exhaust fan on/off
- Turning the hydraulic unit on
- Running the stoker of a Biojet T burner or the linear actuator for moving the grate in a
MultiJet system
20
2.4.2 AUTOMATIC
The AUTOMATIC button under OPERATION switches the burner on, if the flue gas
thermostat detects a flame in the burner. In this mode, the power output of the burner will
be between 20% and 100%. If there is no flame, the user is instructed on how to ignite the
burner (see section 2.5).
During the automatic mode, the user can override the timers for ash removal augers and
the automated sweeper function.
2.4.3 SHUT-DOWN
The SHUT-DOWN button allows the user to stop the funnel refill function. The system will
remain operational for as long as there is fuel in the feed auger and in the funnel.
Ultimately, a flame status alarm will stop the system. The button can be used to prepare for
servicing the boiler and the burner, for example.
2.4.4 ON/OFF-MODE IN USE / OUT OF USE
When this function is in use and system is equipped with automatic ignition system,
boiler/accumulator tank is first heated up and then burning process will be controlled down
with shut-down –sequence. When boiler temperature goes below the temperature, which is
set with parameter STARTING TEMPERATURE, starts new ignition process. Using of
external start command is described in chapter 2.5.2.
2.4.5 STOP
The STOP button stops all devices that are connected to the boiler with the exception of
the flue gas extractor and the pumps, which must be switched off manually if required.
21
2.5 START UP
It’s possible to start up burner in two ways. Normally ignition is made manually. This
operation method is advised by the “wizard”-program, which helps user to start-up the
system. This process is described in chapters 2.5.1 and 2.5.2 (when igniting is made with
the help of hot air gun).
Biojet and Hakejet burners can be equipped with the automatic ignition system. It’s
possible to use ignition system in two alternative ways:
1. Ignition is started by the user and burner runs until it stops by the shut-down command made by user or some alarm
2. ON-OFF –mode, which is started by the user, but after that, system makes automatic
ignitions and shut-downs based on temperature in boiler or/and external start
command (for example thermostat in accumulator tank).
Instructions for configuration and using of automatic ignition system are in chapter 2.5.2.
2.5.1 MANUAL IGNITION
When the AUTO mode is activated, but there is no flame in the boiler, the user is instructed
on how to ignite the burner (IGNITION1). This mode allows the user to run the feed auger
and to activate the primary and secondary fans (the -/+ buttons allow the user to
decrease/increase the fan revolutions). Siloscrew fills fuel hopper/pellet feeder
automatically based on level sensor.
Once the fuel is lit and the flame has been established, the user should click on the
IGNITION1 READY button to proceed to the next step (IGNITION2).
22
In the phace IGNITION burner is run at a fixed power output (CONSTANT EFFECT) which
the user can increase as appropriate. The fuel feed rate and fan revolutions are controlled
automatically. When the system detects a flame in the burner, a flame symbol will appear to
the screen. The user can then click on the IGNITION2 READY button, which switches the
burner’s power output regulation to automatic. The user does not have to wait for the flame
status report but can click on the IGNITION2 READY button before.
2.5.2 MANUAL IGNITION WITH THE HOT AIR GUN
When automatic firing system has been taken in use in OPTIONS 2-menu, there is two new
buttons available on the IGNITION 1 –page. In the upper left corner is selection button,
which is used for choosing of mode, how ignition is wanted to be done. In the following
picture this button is in mode MANUAL IGNITION ON. When this button is pressed, starts
the automatic ignition procedure AUTOM. FIRING RUNNING, which is described in chapter
2.5.4.
When mode MANUAL IGNITION ON is active, you can start up the burner manually with the
help of hot air gun. This starting method is useful for example in case, when burner has
gone out and there already is fuel in the burner screw and you don’t want to make
automatic ignition from the beginning. You can feed fuel manually to the burner, put
combustion fans to run and start hot air gun. When fuel is burning, click IGNITION 1 READY
to proceed to the next step (IGNITION 2, see chapter 2.5.1).
23
2.5.3 AUTOMATIC IGNITION (optional accessory)
When automatic firing system has been taken in use in OPTIONS 2-menu and system is
equipped with hot air gun, optical flame sensor and flue gas fan, it’s possible to start up
burner automatically.
Settings for automatic ignition are in menu AUTOFIRING.
It’s possible to set two operation modes for full-automatic ignition.
1. ON-mode: Ignition process is started by the user and burner runs until it stops after
the shut-down -command (given by user) or some alarm. When you want to use ONmode, check first, that on OPERATION-page button ON/OFF MODE –button is in
position NOT IN USE.
2. ON-OFF –mode, which is started by the user, but after that, system makes automatic
ignitions and shut-downs based on temperature in boiler or/and external start
command (for example thermostat in accumulator tank). When you want to use ONOFF -mode, check first, that on OPERATION-page button ON/OFF MODE –button is in
position IN USE.
24
In both of these methods, hot air gun makes cleaning air burst (20 seconds) every 20
minutes. Addition to this, hot air gun is cooled and ventilated with the air intake from the
primary combustion fan.
1. ON-mode:
This ignition method includes the following phases:
1.1 When you want to start burner, open “OPERATION”-page. Press AUTOMATICbutton. If the flame supervision doesn’t see flame, page IGNITION 1 pops up.
1.2 Press -2-state selection button MANUAL IGNITION ON . State of button changes for
AUTOM. FIRING RUNNING . After this control system goes through the following
phases without user’s actions. In following picture ignition is just started.
If capacitive sensor doesn’t sense pellets, starts siloscrew, which runs as long as
funnel/pellet feeder has been filled. Then starts pre-dosing period and feeding screw
runs the time, which is set for the parameter BURNER’S FILLING TIME in AUTOFIRINGmenu.
It’s possible to stop pre-dosing by pressing button BURNER’S FILLING IN USE and
control jumps to the next step.
NOTE! The right length of BURNER’S FILLING TIME has to be checked by authorized
service man in the first start-up! If time is too short, there isn’t fuel in the front of hot air
pipes and ignition phase ends with the alarm, when IGNITIONTIME -time has ran out. If
filling time is too long, there is too much fuel in the burner, which causes delay in
ignition or possibly fails it.
1.3 After pre-dosing feeding screw stops. Hot air gun and combustion fans start. When
flame sensor has recognized the flame continuously the time, which is set for FLAME
DETECTION DELAY, hot air gun stops and control jumps to the next step.
If sensor doesn’t see flame during the time, which is set for IGNITIONTIME , system
gives alarm.
25
Hot air gun can be stopped manually by pressing button HOTAIRGUN RUNNING.
1.4 Then burner will be driven with the constant effect, which is set for parameter
STARTING EFFECT-%. This phase lasts as long as is set for STARTEFFECT
RUNTIME. Then control system continues operation in mode, which is set for
parameter EFFECT REGULATIONSTARTEFFECT RUNTIME in TEMP.CONTROLmenu.
ON/OFF -mode: This ignition method includes the following phases:
Is the same as ON-mode regarding ignition procedure, but moreover, burner can be driven
down and up again based on boiler temperature and/or external accumulator thermostat.
ON/OFF-control can be made based on boiler sensor only (see example 1) or based on
combination of boiler sensor and accumulator thermostat (see example 2).
Example 1: on OPERATION-page button ON/OFF MODE –button is in position IN USE.
Function THERMOSTAT IN HOTWATER ACCUMULATOR is in mode NOT IN USE. With these
settings ignition process is started as written in chapter XXX. Burner runs until water boiler
temperature goes above SETTING VALUE FOR TEMP.” + (HYSTERESIS” / 2). After that
control program starts to wait until effect-% goes under the value, which is set for
parameter SHUTDOWN WHEN EFFECT-% UNDER. Then burner will turn to standby-mode,
when flame supervision doesn’t see flame anymore. When boiler temperature has fallen
under STARTING TEMPERATURE, burner will be ignited automatically again.
As an example, setting value for boiler water is 80°C and hysteresis is 4°C. SHUTDOWN
WHEN EFFECT-% UNDER is set to value 30%. In this case permission to shut-down is
given at 82°C. And shut-down period starts when temperature regulation goes below 30%.
Under shut-down period, silo screw doesn’t run. Burner uses the pellet amount, which is
stored to the funnel/pellet feeder on that moment, when control system gives command to
start shut-down period. Shut-down period is active as long as flame supervision recognizes
the flame. When flame goes off, flue gas fan and cooling pump (used in Biojet burner) run
the time, which has been set for the parameter EXHAUST FAN AND COLLING PUMP
RUNTIME AFTER SHUTDOWN.
26
Example 2: Same as in example 1, but new ignition is started, when boiler water
temperature has fallen under STARTING TEMPERATURE and control system gets external
start command (Normally open contact) from thermostat in accumulator tank. If you want to
use burner in this mode, check that button THERMOSTAT IN HOTWATER ACCUMULATOR
is in state IN USE.
Sensor scaling
Boiler screen view with energy meter option
27
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement