ANTTI VACBOOST M09 A1500 User manual

Installation and
Operating Instructions
ANTTI DRYER HEATER
(Gas-fuelled heater, direct driven)
VACBOOST M09 A1500
408102 (en)
06-2010
ANTTI-TEOLLISUUS OY
Koskentie 89
FI-25340 Kanunki, Salo
Tel. [phone]
Fax [phone]
E-mail: antti@antti-teollisuus.
www.antti-teollisuus.

Dryer heater type.................................................................................................................................................... 3
PRESENTATION OF THE MACHINE .................................................................................................................... 4
Suitable gases:....................................................................................................................................................... 5
PURSUED CONFIGURATION ............................................................................................................................... 6
INSTALLATION ...................................................................................................................................................... 8
Safety instructions and regulations......................................................................................................................... 8
Selecting the installation location ........................................................................................................................... 8
Components to be installed in front of the gas burner............................................................................................ 8
Gas reservoir/connection........................................................................................................................................ 8
Lifting the dryer heater in place .............................................................................................................................. 9
Installing the air ducts............................................................................................................................................. 9
Electric installation................................................................................................................................................ 10
OPERATING INSTRUCTIONS FOR THE DRYER HEATER ............................................................................... 13
Adjusting the output.............................................................................................................................................. 13
SERVICING.......................................................................................................................................................... 14
Annual service...................................................................................................................................................... 14
Maintenance during the operation........................................................................................................................ 14
GUARANTEE ....................................................................................................................................................... 14
POSSIBLE MALFUNCTIONS IN THE GAS BURNER......................................................................................... 15
EU Declaration of Conformity............................................................................................................................... 18
CONTENTS

Antti-Teollisuus Oy 3 408102 06-2010
Vacboost WM09
Dryer Heater
Dryer heater type
This book deals with the Antti A1500 range of gas fuelled, direct driven dryer heaters. Channel burners are avail-
able for two di󰀨erent gases; liquid gas and natural gas. The basic components of the two burners are similar. Refer
to the nameplate a󰀩xed to the side of the machine for detailed information about the type of your heater. Always
notify the seller and the service personnel of the information in the nameplate to ensure quick assistance in case
of malfunction and when ordering spare parts. To have this data available whenever required, write it down in the
corresponding place on this page.

Antti-Teollisuus Oy 4 408102 06-2010
Vacboost WM09
Dryer Heater
PRESENTATION OF THE MACHINE
- The Vacuum Heater A1500 is intended for heating the drying air in a grain dryer. The blower unit, or units,
generate(s) an airow through the heater and the dryer. The maximum temperature of the drying air can be as
high as 120°C.
- In the basic set-up, the grain dryer is placed between the heater and the blower, and an air duct is conducted
from the heater to the dryer's inlet air channel end. The air ows through the drying sections and via the suction
fan in the outlet air channel end into the air duct and further out of the building.
- The dryer heater is delivered in several parts, which comprise the heat exchanger, the outlet cone (can be bought
separately), the oil burner, the rain cover for the oil burner and the accessories required for the assembly. In
addition, the air pipe must be xed/the heater must be connected to the dryer. The electric installations of the
grain dryer's control centre must be carried out by an electrician. In addition is required a supply/reservoir of
gas, and a pipeline from it to the burner, installed in accordance with the regulations.

Antti-Teollisuus Oy 5 408102 06-2010
Vacboost WM09
Dryer Heater
Part Item Denomination Dwg. no. Pcs. Weight
1 A70232 DR HEATER A1500 RADIATION SHIELD A70232 8 17.1
2 A70700 STRIP FOR DR HEATER A1500 RADIATION SHIELD A70700 8 1.5
3 A70233 DR HEATER A1500 OUTER JACKET ZN A70233 6 17.8
4 A70333 DR HEATER A1500 OUTER JACKET ZN UPPER PL A70333 1 18.2
5 A70334 DR HEATER A1500 OUTER JACKET ZN LOWER PL A70334 1 17.3
6 A70240 DR HEATER A1500 FURNACE ASSEMBLY A70240 1 128.1
7 A70251 DR HEATER A1500 BASE A70251 2 23
8 A70597 DR HEATER A1500 NAMEPL ANTTI A70597 2 5.4
9 A71290 DR HEATER A1500 SUCTION CONE A71290 1 66.8
10 800074 GAS BURNER A1500 OILON GP 90H 1 63
11 A70238 RAIN COVER BURNER ASSEMBLED A-500 - A-1500 A70238 1 14
12 A70244 OUTLET CONE A1500 FOR D1250 HEATER accessory A70244 1 54.4
Suitable gases:
Natural gas:
- for gases of H and E subgroups in the 2nd family (equipment categories I2H and I2E)
- supply pressure (=inlet pressure) to the burner is 20-150/360 mbar (see table)
- temperature of gas when arriving to the gas valve: -15...+40 °C.
Liquid gas
- for gases of subgroup P in the 3rd family (equipment category I3P)
- supply pressure (=inlet pressure) to the burner is 30-150/360 mbar (see table)
- temperature of gas when arriving to the gas valve: 0...+40 °C.
The suitability of the burner for other gases or supply pressures, than the above-mentioned, must be checked
with the manufacturer of the burner.
The inuence of the inlet pressure of the gas on the capacity range of the burner
Burner Gas valve Capacity range of the burner, kW *) Max. supply
pressure
mbar
Supply pressure of the gas
Size of the
connection
Type **) 20 mbar 30 mbar 50 mbar 100 mbar
GP-90 H 1 ½” MB-ZRDLE 415 B01 S20 350-600 350-650 350-870 350-1200 360
2” MB-ZRDLE 415 B01 S20 tai 350-680 350-780 350-1160 350-1500 360
ZRDLE 420/5 + GS-2011-6210 350-1000 350-1200 350-1500 350-1500 150
*)
The maximum capacities according to the table are achieved, when the counter-pressure of the boiler is 0, and the air
pressure is1013 mbar
**)
or equivalent type

Antti-Teollisuus Oy 6 408102 06-2010
Vacboost WM09
Dryer Heater
Installing the heater
PURSUED CONFIGURATION
The normal operating environment of the unit is an element silo dryer made from steel with a vacuum heater for
generation of heat. A grain dryer of section type is located inside the building, and the inlet and outlet air ducts are
located on the opposite sides of the dryer building.
The heater can be placed in such a manner that the air will be conducted through the air duct into the dryer's air
channel. Alternatively, the air duct can be extended down to the ground, which makes it possible to connect the
heater directly to the dryer.
The debris pipe from the pre-cleaner must be equipped with a cyclone or equivalent for separation of debris. The
separator must be located on the same side with the outlet air duct or entering of dust or debris into the suction
opening of the heater must be prevented by some other means.
The inlet air is heated by means of a positive pressure heater located in a separate masonry heater room. This
heater room can be built either right beside the dryer or near it, but only if the following requirements are being met:
- Where a wall of the heater room abuts on the dryer building, this wall must meet the requirements according to
class EI60. Structural details that face outward can be of class EI130, and the roof can be of class EI160.
- If the wall of the heater room, that faces the dryer building, is at a distance of at least one (1) metre from this
building, the wall can be of class EI30. Note! Also clarify the prerequisites for the door opening, and the su󰀩cient
length for the air duct.
- If the heater is protected against rain, it can be installed at a distance of at least three (3) metres from the grain
dryer and other buildings. The length of the air duct between the glowing parts of the heater and the air channel
end must be 6 metres.

Antti-Teollisuus Oy 7 408102 06-2010
Vacboost WM09
Dryer Heater
Structural drawing of a solution with wooden roof truss, re rating REI60.
1. Plasterboard (min 12.5 mm), the seams of the boards must be lapped
2. Plasterboard (min 12.5 mm), the seams of the boards must be lapped
3. Studding > 22x45
4. Studding > 22x45
5. Rockwool, at least 200 mm
- To ensure su󰀩cient air supply, the front wall of the heater room must be provided with a door or doors. In ad-
dition, the front wall must be located in a dust-free area. There must be an even, dust-free area in front of the
heater room's air intake door; this area should preferably be concreted and be as wide as the heater room.
- The doors to the heater room must be open during operation.
- The heater room's door opening must be located at a distance of at least 3 metres from any ammable wall of
the dryer, and at least 1,5 metres from any non-ammable wall of the dryer.
The above-mentioned distances also apply if an existing dryer is converted to a vacuum dryer. Primarily, the same
regulations apply to insulated and sheet-metal-clad StandAlone dryers that are installed out of doors than to silo
element dryers that are constructed of steel.

Antti-Teollisuus Oy 8 408102 06-2010
Vacboost WM09
Dryer Heater
INSTALLATION
Safety instructions and regulations
The installation of the dryer heater must be carried out by a skilled electrician and a gas appliance tter with relevant
authorisations, in the presence of a person, who is familiar with the installation procedure of the dryer machinery.
The permissions required for the building work and connecting the gas appliances need to be applied from, for
example, the gas supplier. Contact the local building authorities for additional information.
Selecting the installation location
The distance to the other buildings, and location of the debris pipe in the dryer, restrict the selection of the location.
The outlet air pipe must be located on the opposite side of the burner, and access of any debris or dust into the
suction net must be prevented.
Components to be installed in front of the gas burner
Depending on the requirements and conditions, either all or only part of the following components will be needed:
- pressure gauge before the pressure reducer
- gas meter
The electric and gas installations shall be exclusively assigned to persons with su󰀩cient skills and valid authorisation.
The permissions required for the building work and connecting the gas appliances need to be obtained, for example,
from the gas supplier. Contact the local building authorities for additional information.
A diagram for connecting the actuators of the burner is delivered with the gas burner. The instructions for connect-
ing them to the control centre of the dryer are delivered with the centre.
NOTE! DEBRIS IN THE SUCTION AIR OF THE HEATER CONSTITUTES A FIRE HAZARD!
THE HEATER MUST BE LOCATED IN A PLACE WHERE ENTERING OF DEBRIS IS PREVENTED.
THE BURNER OF THE HEATER MUST ABSOLUTELY BE PROTECTED AGAINST THE RAIN. IF THE BURNER IS
NOT PROTECTED, ANTTI-TEOLLISUUS OY WILL NOT ASSUME ANY LIABILITY FOR THE CONSEQUENCES.
Inlet air for the dryer heater must not be routed from inside the heater room, but the room must be equipped with
openable doors for this purpose. These doors shall be locked in the open-position during the operation. This is
ensured by a limit switch in the door.
Gas reservoir/connection
Consult the local municipal authorities for valid regulations for the gas reservoir and the gas connection. Turn to
the supplier of gas for more information.

Antti-Teollisuus Oy 9 408102 06-2010
Vacboost WM09
Dryer Heater
Lifting the dryer heater in place
- When lifting the heater, observe the following:
- use all the lifting lugs provided
- ensure that the lifting gear stays in position in the lugs
- only use hoists with su󰀩cient lifting capacity
- never go under or too near the unit to be lifted
- Lift the heater without the burner in the place presented in the installation drawing or plan. Because the founda-
tion must be level and steady by default, there is no need to attach the heater specically to its bed.
Installing the air ducts
- The air ducts between the dryer heater and the dryer shall be assembled of air duct parts D1250 or the heater
shall be connected to the dryer as shown in the picture above.
- Normally, the inlet air duct from the heater will be routed to the lowermost drying sections. The blower unit, or
units, shall be installed so that even small batches can be dried.
- The air ducts shall be installed so that neither loose grain nor debris can slide directly into the heater from the
air channel end of the drying section.
- Before installing the ducts, make sure that no foreign objects have ended up inside the heater.
WARNING! Foreign particles inside the heater are a re hazard!
The maximum e󰀨ect allowed for the heater is 1,500 kW, which must not be exceeded.
The given maximum gas volumes are indicative only. The required volume is a󰀨ected by the energy content of the
gas. Turn to your gas supplier for more detailed information:
Liquid gas 58.4 m3/h
Natural gas 150.0 m3/h
If you know the energy content of the gas, you will be able to calculate exactly the maximum allowed gas volume.
NOTE! The maximum allowed output of the heater must not be exceeded!

Antti-Teollisuus Oy 10 408102 06-2010
Vacboost WM09
Dryer Heater
Electric installation
Assign an authorised electrician to all electrical installation work, including installation of thermostats and connec-
tions to the control centre of the dryer! The electrician shall issue a certicate of the installation work in writing.
Installation instructions of the thermostats and sensors for the electrician (see also Fig. “Location of the thermo-
stats in the dryer”):
- On the inlet side, the thermostats and the sensor shall be installed in the air duct inside the building (if there is
a building) in a straight part of the duct (not near the curves) where the airow is smooth. Furthermore, there
must not be a direct line of vision from the sensors to the rear part of the combustion chamber so that the red
glow from the combustion chamber could interfere with the values measured by the thermostats.
If the sensors transmit wrong information, moving one of them to the other side of the duct may help. Hot and
cool air have probably not yet mixed completely at this stage. Another option is to measure the true temperature
of the drying air and raise the setting of the thermostats from their rated values by the di󰀨erence between the
true and the wrong measurement results (applies to the LTM thermostat).
- If there are more than just one blower, the thermostats and the sensors on the outlet side shall be installed in
the lower air duct (as required, the upper blower can be disabled).
- If the heater is located in a heater room, the door to the room must be equipped with a limit switch. The purpose
of the limit switch is to ensure su󰀩cient airow through the heater.
- The electric conductors must be at a distance of at least 50 mm from the surface of the heating pipe so as to
avoid risk of overheating.
- Carry out the electric installations of the heater in accordance with the wiring diagrams for the electric centre.
Thermostats and their initial settings:
- Temperature regulator, LTM -thermostat. If you are using the Logic Control Centre, there is no need for a sepa-
rate LTM thermostat. If the maximum drying temperature of 120°C is applied, the “limit” value for the thermostat
must be raised to 150°C, so that the burner will switch o󰀨 if this temperature for any reason would be attained
(in case of malfunction). The standard setting is 110°C and it is intended for standard positive pressure heaters.
The thermostat in question also prevents the blowers from stopping until the drying air temperature has dropped
to 45°C, i.e. to the “fan” value of the thermostat. There are two discs inside the thermostat for adjusting the
“fan” and “limit” settings. The sticker under the screwed lock shows that the terminal block of system 1 are for
setting of “limit” etc. Drill a D19 mm hole in the air inlet pipe for the capillary pipe of the thermostat, and insert
this pipe inside the air duct and x it by its holder on the pipe using, for example, self-tapping screws.
- Sensor for drying air temperature (sensor for the 2nd ame). Drill a 10.5 mm hole in the inlet air pipe. Thread
in the thermostat sensor into the D8x1 nylon pipe, L=150 mm, so that about half of the sensor's tip remains
visible. Place a lead-through rubber ring on the nylon pipe and x the assembly to the pipe by means of the
lead-through rubber ring. The sensor must be inserted about 100 mm into the air pipe. See picture on the next
page.
- The purpose of the pressure di󰀨erence sensor is to monitor that the air ows through the heater and does not
take any other route of lower resistance. Therefore, it must not be installed anywhere else than in the inlet air
pipe after the heater.

Antti-Teollisuus Oy 11 408102 06-2010
Vacboost WM09
Dryer Heater
Installing the pressure dierence sensor
Fix the pressure di󰀨erence gauge and the control unit “clock” on the wall. Ensure that the cover plug has been
removed from the pipe sleeve closest to the wall. Connect the PVC hose to the outlet sleeve for the pipe farther
away from the wall (see picture). You can cut the hose to a suitable length, x it to the lead-through sleeve and
x the sleeve to the air pipe using self-tapping screws (see the picture below). Do not forget to place a neoprene
washer between the pipe and the lead-through sleeve. Insulated Abico connectors for electric connection to the
poles 2 and 3 are included in the delivery. Adjust the pressure by turning the disc in the middle of the “clock”. Adjust
the pressure to a value where the change-over switch will operate at the smallest possible airow. If the change-
over switch does not operate, the oil burner will not start.
- The purpose of the outlet air thermostat is to interrupt the drying process as soon as the outlet air temperature
reaches the desired value. The sensor shall be installed in the lower outlet air pipe. Normally 35-50°C; depend-
ing on the variety being dried and the drying temperature applied. If you apply drying temperatures higher than
normally, the cut-o󰀨 temperature will also be higher than normally. Install the sensor inside the pipe in the same
manner as the drying air sensor, mentioned above in this manual.

Antti-Teollisuus Oy 12 408102 06-2010
Vacboost WM09
Dryer Heater
2.
Location of the thermostats in the grain dryer
1.
- The re thermostat shuts down all the operations of the dryer immediately after the pre-set temperature has
been reached, for example, as a result of re inside the dryer. The re thermostat is included in the axial blower
delivery. A re thermostat shall be installed in every outlet pipe of the blower. Normally, the thermostat is adjusted
to 60°C. The thermostat comes with a 2m-long capillary pipe that makes it possible to install the thermostat
box in a location with easy access. The manually operated reset button at the side of the thermostat box must
always be reset after the temperature has risen to the switch-o󰀨 limit. During normal operation the temperature
never rises to such a high value. This may occur exceptionally, for example, when the dryer is being test run
empty whereupon the temperature may easily rise to its pre-set switch-o󰀨 value.
1.
- Sensor PTC for the drying air temperature (sensor
for the 2nd ame)
- LTM thermostat (not to be installed if the dryer is
equipped with Logicontrol)
- Pressure di󰀨erence sensor
- Constant temperature sensor (optional)
On the inlet side, the sensors shall be installed in the air
pipe inside the building, in a straight part of the pipe (not
near curves). Also ensure, that there is no direct line of
vision from the sensors to the rear part of the combustion
chamber. The heat radiation from the chamber transmits
wrong measurement results to the thermostats.
2.
- Outlet air thermostat PTC
- Fire thermostat
If there are two blowers, the sensors on the outlet side
shall be installed in the lower air pipe (if necessary, the
upper blower can be disabled).

Antti-Teollisuus Oy 13 408102 06-2010
Vacboost WM09
Dryer Heater
To be observed before starting the operation
- The oil burner tter and the electrician have completed the test run.
- The operation of the safety devices needs to be tested in practice to ensure their proper operation.
- Gas is being supplied to the burner.
- There are no objects in the heater room that do not belong there.
- That exclusively clean air is sucked through the heater.
- The shut-o󰀨 valves in the oil pipes are in the open-position.
- Check once more that the main switches and possible safety switches are in the operating position.
- That there is a re extinguisher outside the heater room during the drying process.
- Make sure that the slab in front and at both sides of the suction nets of the heater is clean and, for example,
the wind cannot blow debris or withered plants near to the suction cone opening of the heater.
OPERATING INSTRUCTIONS FOR THE DRYER HEATER
Adjusting the output
- In dryers equipped with axial blowers, the drying air ow is restricted, as necessary, by means of the adjuster
in the outlet air channel, which provides the blower with replacement air.
In dryers equipped with radial blowers, the drying air ow is restricted, as necessary, by means of the adjust-
ment ap in the outlet air pipes. The ap shall be located between the dryer and the blower.
- Adjust the drying air temperature to the desired value by changing the setting of the 2-stage digital thermostat.
In digital control centres, the adjustment is carried out using the set-up buttons for the digital thermostat. In the
Logicontrol centres the adjustment is carried out in the “settings” menu using the programming terminal for the
logic. NOTE. In the Logicontrol centres the settings of the Eliwell digital displays must not be changed, as they
can only be used for reading the temperature prevailing inside the channel.
- In the 2-stage burner, the ow of burning air is automatically adjusted so that it corresponds to the consumption
of oil (in accordance with the linear adjustment, carried out during installation of the burner).
WARNING! Before opening the burner, make sure that it is tensionless. High tension inside the burner.
Risk of fatal electric shock.
- When passing from the drying stage to the cooling stage after the drying, the thermostat of the drying automa-
tion stops the burner automatically as soon as the pre-set outlet temperature, i.e. the cut-o󰀨 point, has been
reached (if the heater is connected to an automatic centre).
- The heater fan cannot be switched o󰀨 even via its own operating switch before the heater has cooled down
below the "fan” temperature of the LTM thermostat (nor shall the heater blower be switched o󰀨 from the main
switch until the heater has cooled down).

Antti-Teollisuus Oy 14 408102 06-2010
Vacboost WM09
Dryer Heater
SERVICING
Annual service
- To ensure reliable operation, clean the ignition points and check the adjustment.
- Check the position, condition and cleanliness of the ame detector.
- Clean the lters.
- Check the gas piping/appliances for tightness.
- Remove any dust or damp, and keep the burner clean.
- It is advisable to service the burner once a year, and check its burning characteristics using a ue gas analyser.
- Check using a ash light before every drying season, that there are no nests of mice, rats or birds inside the
heater, between the surfaces of the heat exchanger, which might constitute a re hazard.
- Ensure that the inlet air piping of the dryer is clean. Some runo󰀨 of grain may have occurred from the dryer
during the lling phase.
- Always test the operation of the limit switch on the heater room door before the start of the drying season.
Maintenance during the operation
- If all the annual services have been carried out carefully, the dryer heater will only require a visual check daily
during the operating season. Even if the operation of the heater is controlled via the electric centre of the dryer,
it is advisable to go, look and listen a few times a day that the operation of the heater is normal.
GUARANTEE
The guarantee period for the Antti-heaters runs for one (1) operating season. A ve-year guarantee is granted to
the re surfaces of the heater. The guarantee covers defects in material and workmanship. Separate guarantee
terms issued by the manufacturer apply to the oil burner.
A prerequisite for validity of the guarantee is that the instructions issued by the manufacturer and the valid regula-
tions have been followed during installation, use and service of the dryer heater.
All matters related to the guarantee shall be agreed upon with the manufacturer before any action is taken.

Antti-Teollisuus Oy 15 408102 06-2010
Vacboost WM09
Dryer Heater
POSSIBLE MALFUNCTIONS IN THE GAS BURNER
In case of malfunction, check rst the following:
1. Is the supply of control and mains voltage to the burner OK?
2. Is the possible leak tester in working order (is the yellow signal light illuminated)?
3. Are the settings of the adjustment and operating controls OK?
4. Are the safety devices in normal working mode?
5. Is the fuel supply to the burner OK? Are the valves in the gas pipeline open? Is the pressure in the gas pipeline su󰀩cient?
If the cause of the malfunction is none of the above-mentioned, check the functions related to the burner. If the control unit
is locked resulting from a malfunction (the signal light is illuminated), reset the locking. The burner starts as soon as the step
switch of the control unit has been turned into its initial position, and all the other prerequisites for a successful start are met
(“Burner automation, description of operation”). Follow the operation of the burner. The symbol of the program indicator of the
control unit is an indication of the possible fault type (see “Indication of malfunction and control programme”). You can use
measuring instruments for fault nding.
Symptoms Possible cause Remedy
1. Motor
The motor of the burner does not start
(symbol ◄)
Current circuit broken Clear up the break
Thermal relay has tripped or is faulty Check the setting, reset or replace
Fuse has tripped Reset or replace
Motor contact faulty Replace
Motor faulty Replace the motor
Break in the motor's control circuit:
- faulty control unit Replace the relay
- faulty setting of the cam wheel for the
adjustment motor's air adjustment plate
Fix the setting
- faulty adjustment motor Replace the motor
2. Low air pressure
The burner motor starts, but stops
abruptly during pre-ventilation or after that
(symbol P)
Faulty setting of the air di󰀨erential pres-
sure switch
Check the setting, repair as required
The impulse hose(s) for the air di󰀨erential
pressure switch dirty
Clean the hose(s)
Faulty air di󰀨erential pressure switch Replace
Soiled blower Clean

Antti-Teollisuus Oy 16 408102 06-2010
Vacboost WM09
Dryer Heater
Symptoms Possible cause Remedy
3. Ignition fault
The burner motor starts, the control volt-
age supply from the control unit to the
ignition transformer has been switched
on. No ignition occurs, and after a short
while, a rapid shut-o󰀨 takes place (symbol
1.)
Soiled or worn ignition points, damaged
insulation
Clean or replace
Point clearance too high Adjust according to the instructions
Damaged ignition cord Replace
Faulty ignition transformer Replace
The burner motor starts, the control
voltage supply from the control unit to
the ignition transformer has not been
switched on. No ignition occurs, and after
a short while, a rapid shut-o󰀨 takes place
(symbol 1.)
Faulty control unit Replace
The supply plug of the ignition transform-
er has come loose or damaged
Connect or replace
4. No ame is formed
The burner motor starts, ignition spark is
formed, after a short while, a rapid shut-
o󰀨 takes place (symbol 2.)
Gas valve does not open: Clear up the reason for the break (see
Circuit diagram)
- break in the control circuit Replace the damaged part
- faulty actuator
- damaged conductor
Faulty gas ow setting Adjust
5. A break after the ame has formed
Flame is formed. A shut-o󰀨 occurs (gas
pressure switch, min.), followed by a
restart – or when the burner steps up
to the 2nd stage – the operation stops
(gas pressure switch, min.), and a restart
follows.
Gas pressure too low:
- pressure regulator not operational Repair or replace the regulator
Clogged lter Clean the lter
Setting of the gas pressure switch (min.)
faulty
Adjust

Antti-Teollisuus Oy 17 408102 06-2010
Vacboost WM09
Dryer Heater
Symptoms Possible cause Remedy
6. Malfunction caused by the ame detection (=rapid shut-o󰀨)
The burner motor starts, ame is formed,
then a rapid shut-o󰀨 takes place (symbol
1.)
Faulty position of the ame detector Correct the position
Soiled ame detector Clean
Too vague ame (light) Check the settings of the burner
Faulty ame detector Replace
Faulty control unit Replace
Rapid shut-o󰀨 during pre-ventilation (■) Faulty ame detector Replace
Faulty control unit Replace
Rapid shut-o󰀨 during stopping phase (◄) Faulty or outdated ame detector Replace
Faulty control unit Replace
7. Rapid shut-o󰀨 during stopping phase
The ame does not go out Gas valves are leaking Replace
8. Burner head
Flame ba󰀪e has burned
Replace ame ba󰀪e as required
Distance between the nozzle and the
ame ba󰀪e wrong
Readjust
Faulty combustion air setting Adjust
Insu󰀩cient air supply into the heater room Increase the air supply
Output on 1st stage too low Adjust
Increase the gas ow
Too low ow rate of combustion air:
- faulty adjustment ring position Adjust
9. Malfunction of leak tester
Burner does not start. See point “Leak tester” in the burner
manual
Red signal light is illuminated
Leak tester is faulty Replace
Gas valve is leaking Replace

Antti-Teollisuus Oy 18 408102 06-2010
Vacboost WM09
Dryer Heater
EU Declaration of Conformity
ANTTI-TEOLLISUUS OY
Koskentie 89
FI-25340 KANUNKI
Tel.: [phone]
Fax [phone]
declares that
ANTTI VACBOOST M09 A1500 - DRYER HEATER
(Gas-fuelled heater, direct driven)
conforms with the provisions of the following directives:
- Machine Directive 2006/42/EC
- Low Voltage Directive 2006/95/EC
- Electro-Magnetic Compatibility Directive (EMC) 2004/108/EC
Kuusjoki 11.05.2009
Kalle Isotalo
Managing Director