VEAB ACR35 Installation And Maintenance Instruction
ACR35
Installation and maintenance instruction
GB
for air curtains
IMPORTANT: Read these instructions before the product is installed and used.
Save the instructions for future use.....................................................................................................2
Art.nr: 172787-01
ACR35
Assembly and operating instructions
Safety
• For all installations of electrically heated products
should a residual current circuit breaker 300 mA for
re protection be used.
• Keep the areas around the air intake and exhaust grilles free from possible obstructions!
• CAUTION! During operation the surfaces of the unit
can be hot!
• e unit must not be fully or partially covered with
clothing, or similar materials, as overheating can result
in a re risk! (E)
• e appliance can be used by children, aged from 8
years and above, and by persons (children included)
with reduced physical, sensory, or mental capabilities,
or lack of experience and knowledge, if they have been
given supervision or instruction concerning use of the
appliance in a safe way and understand the hazards
involved.
Children shall not play with the appliance.
Cleaning and user maintenance shall not be made
by children without supervision.
Children, of less than 3 years of age, should be kept
away unless continuously supervised.
Children, aged from 3 years and less than 8 years, shall
only switch on/o the appliance, provided that it has
been placed or installed in its intended normal operating position and they have been giving supervision or
instruction concerning use of the appliance in a safe
way and understand the hazards involved. Children,
aged from 3 years and less than 8 years, shall not plug
in, regulate and clean the appliance or perform user
maintenance.
Technical data is on p.19.
General instructions
Read these instructions carefully before installation and
use. Keep this manual for future reference.
e guarantee is only valid if the units are used in the
manner intended by the manufacturer and in accordance
with the VEAB mounting and operating instructions.
ACR35 is recessed in false ceilings above entrances.
Protection class above false ceiling: IP44, below false
ceiling: IP20
Operation
Air is drawn in from underneath and blown out downwards towards the entrance so that it shields the door
opening and minimises heat loss. To get the best curtain
eect the unit must extend the full width of the door
opening.
e grille for directing exhaust air is adjustable and is
normally angled outwards to achieve the best protection
against incoming cold air.
e air speed is adjusted to the desired airow.
e eciency of the air curtain(s) depends on the air
temperature, pressure dierences across the doorway and
any wind pressure.
NOTE! Negative pressure in the building considerably
reduces the eciency of the air curtain. e ventilation should
therefore be balanced!
Installation
e air curtain unit is installed horizontally with the
supply air grille facing downwards as close to the door as
possible, concealed in the false ceiling. e only visible
part of the unit is the underside that is level with the
ceiling.
For the protection of wider doorways, several units can
be mounted next to each other.
Ensure that the service hatch is accessible and can be
fully opened.
Mounting on threaded bars inside unit.
1. e mounting brackets (4x) are xed to the unit
during transport. Loosen them and screw them into
place inside the unit in the intended holes.
2. Hang up on threaded bars (M8) according to gure
2b (not included). Note that the brackets are at
dierent heights and threaded rods shall be of
dierent lengths.
3. Adjust the height using the lower nut so that the
frame is on the level of the ceiling. Lock using the
upper nut.
Application area
e ermo zone ACR35 air curtain unit is supplied
with electrical heating or hot water coil and is intended
for installation above entrances and smaller doors up to
3.5 metres in height.
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ACR35
Electrical installation
e installation, which should be preceded by an omnipolar switch with a contact separation of at least 3
mm, should only be wired by a competent electrician
and in accordance with the latest edition of IEE wiring
regulations.
e control system is pre-installed in the air curtain with
an integrated control card, (see g 5). PLS is supplied
pre-programmed with quick-release connections.
Modular cables are connected to the control board Base,
by opening the service hatch, as shown in g. 3 and 5.
See manual for PLS.
1. e service hatch is opened by loosening the snap
xings located on the down side (turn 90°). See g.3.
2. ACR35-W: e unit is tted with cable and plug.
ACR35-E: e unit is supplied through cable glands
on the side of the unit. For units with electrical
heating, power and control should be supplied
separately. Control (230V~) and power supply for
heat (400V3N~) should be connected to a terminal
block in the terminal box. e largest cable
diameter for the terminal block is 16 mm². e cable
glands used must meet the protection class
requirements. In the distribution board it is to be
indicated that ”the air curtains can be supplied from
more than one connection”.
3. Close the service hatch and make sure that the snap
xings lock properly.
See wiring diagrams.
Type Output
[kW]
ACR35-10 -E 9 400V3N~ 2,5
ACR35-15-E 13,5 400V3N~ 4
ACR35-20-E 18 400V3N~ 10
Voltage
[V]
Minimum area
[mm2]
Start-up
Connecting the water coil (ACR35-W)
e installation must be carried out by an authorised
installer.
e water coil has copper tubes with aluminium ns and
is suitable for connection to a closed water heating system. e heating coil must not be connected to a mains
pressure water system or an open water system.Note
that the unit shall be preceded by a regulating valve, see
VEAB valve kit.
To access the connections (DN20, 3/4”, outside thread)
the service hatch and intake grille must be opened. e
water coil is connected inside the unit through holes
which are made (during installation) on the upper side or
through the side of the unit, possible places are marked
with punch marks.
e connections to the heating coil must be equipped
with shut o valves to allow problem free removal.
Adjustment of the air curtain and air ow
e direction and speed of the air ow should be adjusted considering the load on the opening. Pressure
forces aect the air stream and make it bend inwards
into the premises (when the premises are heated and the
outdoor air is cold).
e air stream should therefore be directed outwards to
withstand the load. Generally speaking, the higher the
load, the greater the angle that is needed.
Basic setting fan speed
e fan speed when the door is open is set using the
speed control. Note that the air ow direction and speed
may need ne adjustment depending on the loading of
the door.
Filter (ACR35-W)
e heat coil n distance, in combination with the whole
diameter of the intake grille, protects against dirt and
blockage and makes a separate lter unnecessary.
Note! When using for the rst time or when starting up after a long period of disuse, a small amount
of smoke and a slight odour may occur temporarily,
which is completely normal.
Service, repairs and maintenance
For all service, repair and maintenance rst carry out the
following:
1. Disconnect the power supply.
2. e service hatch is opened by loosening the snap
xings located on the down side (turn 90°).
See g. 3.
3. After service, repairs and maintenance close the
service hatch and make sure that the snap xings
lock properly.
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ACR35
Maintenance
Since fan motors and other components are maintenance
free, no maintenance other than cleaning is necessary.
e level of cleaning can vary depending on local conditions. Undertake cleaning at least twice a year. Inlet and
exhaust grilles, impeller and elements can be vacuum
cleaned or wiped using a damp cloth. Use a brush when
vacuuming to prevent damaging sensitive parts. Avoid
the use of strong alkaline or acidic cleaning agents.
Overheating
e air curtain unit with electric heater is equipped with
an overheat protector. If it is deployed due to overheating, reset as follows:
1. Disconnect the electricity with the fully
isolated switch.
2. Allow the electrical coil to cool.
3. Determine the cause of overheating and rectify
the fault.
Reset is performed as follows:
1. Locate the red button inside the air curtain unit.
It is visible and accessible by opening of the service
hatch and inlet grille. e button is on the left side
seen from inside the room looking out. On the
2 metre variant, two red buttons are installed in the
middle of the unit.
2. Press the red button until a click is heard.
3. Connect the air curtain again.
Replacing the electric heater/coil (ACR35-E)
1. Mark and disconnect the cables to the electric
heater/coil.
2. Remove the mounting screws securing the electric
heater/coil in the unit and lift the electric heater/coil
out.
3. Install the new electric heater/coil in reverse order
to the above.
Replacing the water coil (ACR35-W)
1. Shut o the water supply to the unit.
2. Disconnect the connections to the water coil.
3. Remove the mounting screws securing the coil in the
unit and lift the coil out.
4. Install the new coil in reverse order to the above.
Draining the water coil (ACR35-W)
e drain valve is on the underside of the coil on the
connector side. It can be accessed via the service hatch.
All motors are equipped with an integral thermal safety
cut-out. is will operate, stopping the air curtain
should the motor temperature rise too high. e cut-out
will automatically reset when the motor temperature has
returned to within the motor's operating limits.
Temperature control
Temperature control of PLS maintains the exhaust
temperature at +40 °C. If the temperature should exceed
anyway there is an overheating alarm. For more information see the manual for PLS.
Fan replacement
1. Determine which of the fans is not functioning.
2. Disconnect the cables to the relevant fan.
3. Remove the screws securing the fan and lift the fan
out.
4. Install the new fan as above in reverse order.
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ACR35
Trouble shooting
If the fans are not working or do not blow properly, check
the following:
• Operating power supply to the unit; check fuses,
circuit-breaker, time switch/thermostat (if any) that
starts and stops the unit.
• at the air ow selector is correctly set.
• at the position limit switch is working.
• at the overheat protection for the motors has not
been deployed.
• at the intake grille is not dirty.
If there is no heat, check the following:
• at the heat demand exists; check thermostat settings
and actual temperature.
For units with electrical heating, check the following:
• Power supply to electric heater coil; check fuses and
circuit-breaker (if any).
• at the overheat protection for the motors has not
been deployed.
For units with water coil, check the following:
• at the water coil is air free.
• at there is enough water ow.
• at incoming water is heated enough.
If the fault cannot be rectied, please contact a qualied
service technician.
Residual current circuit breaker
(applies to units with electric heater)
When the installation is protected by means of a residual
current circuit breaker, which trips when the appliance
is connected, this may be due to moisture in the heating
element. When an appliance containing a heater element
has not been used for a long period or stored in a damp
environment, moisture can enter the element.
is should not be seen as a fault, but is simply rectied
by connecting the appliance to the mains supply via a
socket without a safety cut-out, so that the moisture can
be eliminated from the element. e drying time can
vary from a few hours to a few days. As a preventive
measure, the unit should occasionally be run for a short
time when it is not being used for extended periods of
time.
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