ANTTI VACBOOST M09 A1500 User manual

Installation and
Operating Instructions
ANTTI DRYER HEATER
(Gas-fuelled heater, direct driven)
VACBOOST M09 A1500
408102 (en)
02-2020
ANTTI-TEOLLISUUS OY
Koskentie 89
FI-25340 Kanunki, Salo
Tel. [phone]
E-mail: antti@antti-teollisuus.
www.antti-teollisuus.

Dryer heater type.................................................................................................................................................... 3
PRESENTATION OF THE MACHINE .................................................................................................................... 4
Suitable gases:....................................................................................................................................................... 5
PURSUED CONFIGURATION ............................................................................................................................... 7
INSTALLATION ...................................................................................................................................................... 9
Safety instructions and regulations......................................................................................................................... 9
Selecting the installation location ........................................................................................................................... 9
Components to be installed in front of the gas burner............................................................................................ 9
Gas reservoir/connection........................................................................................................................................ 9
Lifting the dryer heater in place ............................................................................................................................ 12
Installing the air ducts........................................................................................................................................... 12
Grain pocket in the air pipe................................................................................................................................... 13
Locating the sensors and safety devices on a vacuum heater............................................................................. 14
Installing the temperature measuring facility ........................................................................................................ 15
Installing the vacuum sensor................................................................................................................................ 16
Installing the re thermostat ................................................................................................................................. 17
OPERATING INSTRUCTIONS FOR THE DRYER HEATER ............................................................................... 18
SERVICING.......................................................................................................................................................... 19
Annual service...................................................................................................................................................... 19
Maintenance during the operation........................................................................................................................ 19
GUARANTEE ....................................................................................................................................................... 19
POSSIBLE MALFUNCTIONS IN THE GAS BURNER......................................................................................... 20
EU Declaration of Conformity............................................................................................................................... 23
CONTENTS

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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.

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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 delivery of the dryer heater consists of several items: the heat exchanger, the optional outlet cone, the gas
burner and the accessories required for the assembl. 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.
- The suction cone includes eight net elements, which may be removed for cleaning of the net. Loosen rst the
M12x12 screw on the net element (1 screw/element), and after that, remove the element by sliding it in the
direction shown by the arrow.
Screw M8x12
Net element on the inlet air
channel

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Suitable gases:
Check the applicable gases and pressure levels in the burner manual.
Part Item Denomination Pcs. Weight/pcs
1 A70232 DR HEATER A1500 RADIATION SHIELD 8 17,1
2 A70700 STRIP FOR DR HEATER A1500 RADIATION SHIELD 8 1,5
3 A70233 DR HEATER A1500 OUTER JACKET ZN 6 17,8
4 A70333 DR HEATER A1500 OUTER JACKET ZN UPPER PL 1 18,2
5 A70334 DR HEATER A1500 OUTER JACKET ZN LOWER PL 1 17,3
6 A70240 DR HEATER A1500 FURNACE ASSEMBLY 1 128,1
7 A70251 DR HEATER A1500 BASE 2 23
8 A70597 DR HEATER A1500 NAMEPL ANTTI 2 5,4
9 A76456 DR HEATER A1500 SUCTION CONE 1 74,4
10 GAS BURNER 1
11 A76469 DR HEATER A1500 RAIN COVER BURNER 1 18
12 A70244 OUTLET CONE A1500 FOR D1250 HEATER accessory 1 56,2

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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.

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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.
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.
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 MUST BE PROTECTED AGAINST WATER. ANY DAMAGE, CAUSED BY WATER, IS NOT
COVERED BY THE GUARANTEE!

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For a gas heater, the heater room must be provided with an opening of at least 2 times the size of the suction
air opening. This opening can be provided with doors, which are mechanically secured to remain open during
the drying process. The doors can also be provided with an electric limit switch, which enables the burner to
be in operation only while the door is in the open-position. The limit switch shall be connected in series with the
vacuum switch.
To ensure unobstructed ow of inlet air, you must provide at least one metre of free space at the sides and above
the suction nets.
The burner shall be provided with an unobstructed supply of combustion air at all times. The distance from the
burner's rear part to the doorway must be less than 0.5 m.
The area of the suction air openings for the gas-fuelled heater for dimensioning the opening in the
heater room:
The heater 400-1500 kW:
- Area of the suction air opening for the heater 2.3 m²
- Size of the opening in the heater room: at least 4,6 m²
The heater 1500-3000 kW:
- Area of the suction air opening for the heater 4.9 m²
- Size of the opening in the heater room: at least 9,8 m²

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AN EXAMPLE CONFIGURATION
PROVIDING ADEQUATE SUPPLY OF AIR

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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 according to 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!

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Grain pocket in the air pipe
Occassionally, some loose grains can y out of the openings in the air ducts to the air channel end. If the dryer
heater is connected to the heater as illustrated in the picture, the air pipe must absolutely be provided with a grain
pocket. The purpose of the grain pocket is to catch up the loose grains, and prevent them from ending up in the
heater. The grain pocket shall be controlled regularly and emptied, as necessary.
Install the grain pocket in the horizontal part of the air pipe to ensure its operation is ecient, see picture.
Grain pocket
1 m 1 m

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3.
1. 2.
5.
4.
1. 2.
3.
5.
4.
0,5 -2 m
0,5-2 m
0,5-1 m
0,5-1 m
0,5-1 m
0,5-1 m
Locating the sensors and safety devices on a vacuum heater
1. LTM-thermostat
2. Vacuum sensor
3. Temperature sensor for inlet air
4. Fire thermostat
5. Temperature sensor for outlet air
In vacuum dryers with two blowers, the sensors on the outlet side shall be installed in the lower air pipe (as
required, the upper blower can be taken out of use).

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Installing the temperature measuring facility
Pull the PTC sensor (1) with its conductors (4)
through the nylon pipe (2) so that the metal
part of the sensor sticks out about 20 mm
from the nylon pipe.
Drill a hole of 10.5 mm in the air pipe, and
install the lead-through gasket (3) in it.
Push the nylon pipe with the sensor through
the lead-through gasket into the air pipe;
about 20 mm of the nylon pipe shall be
sticking out.
Connect the sensor to the system in accor-
dance
with the wiring diagram. Carry out the
connection in a separate connecting box (not
included in the delivery).
The type of temperature measuring facility depends on the conguration of the machinery. The measuring of the
temperature can be realised, either by means of a PTC-sensor or a temperature transmitter.
Install the temperature transmitter (4) in the air pipe using the
installation ange (3). Drill an 8 mm hole (1) in the inlet air
pipe. Fix the installation ange at the hole in the pipe, using
self-tapping screws (2). Insert the sensor of the temperature
transmitter into the pipe through the installation ange, and
tighten it in place with the lock screw (5)
HOLE

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Installing the vacuum sensor
Fix the sensor unit (1) on the wall in an upright position, as shown in the drawing.
Drill an 8 mm hole in the air pipe for the lead-through sleeve Fix the lead-through sleeve using self-tapping screws
(4). Do not forget to place the rubber washer (3) between the pipe and the lead-through sleeve.
Connect the PVC hose to the "upper" connector (5) of the sensor unit; the cover plug of the connector, closest to
the wall, must be removed. Connect the other end of the hose to the lead-through sleeve.
Connect the cable, using the Abico-connectors included in the delivery, to the terminals 2 and 3 (6), as shown in
the wiring diagram.
The pressure is adjusted by means of the disc, located in the centre of the sensor unit. Set the sensor to such a
pressure value, that the positions 2–3 of the change-over contact will be switched on, even if the air adjuster plate
is in its minimum position.
If the change-over switch is not switched on, the oil burner will not start.

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Installingtherethermostat
Attach the thermostat unit (1) to the wall according to the drawing.
Drill in the air pipe a hole of 16 mm for the sensor holder (2). Fix the holder to the air pipe using screws.
Push the feeler (3) of the thermostat's capillary pipe (5) into the sensor's holder, and lock it by clamping the locking
collar (4) on the capillary pipe and twisting it into the holder.
Set the operating temperature via the adjustment wheel (7). Set the operating temperature of the re thermostat
10°C higher than the maximum temperature of the outlet air, however, to at least 50°C.
Ensure that the re thermostat is active by depressing the reset button (6).
Connect the re thermostat to the system in accordance with the wiring diagram.
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 delivered with the blowers. A re
thermostat is installed in every outlet pipe from the blower.

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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
- In dryers equipped with axial blowers, the drying air ow is restricted, as necessary, by reducing the rotation
speed of the blower by means of a frequency converter.
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.
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).

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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.
- Clean the nets of the suction cone of the gas-fuelled heater.
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.
- As required, clean the nets of the suction cone of the gas-fuelled heater (see page 4)
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. A prerequisite for validity of the
product guarantee is that the control system and the components used are approved by Antti-Teollisuus.
All matters related to the guarantee shall be agreed upon with the manufacturer before any action is taken.

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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