Operation; Installation - Frico AR3520E18 Original Instructions Manual

GB
General Instructions
Read these instructions carefully before
installation and use. Keep this manual for
future reference.
The guarantee is only valid if the units
are used in the manner intended by the
manufacturer and in accordance with the
Frico mounting and operating instructions.
Application area
The Thermozone AR3500 air curtain unit
is supplied without heat, with electrical
heating or hot water coil and is intended
for installation above entrances and smaller
doors up to 3.5 metres in height.
AR3500 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 effect the
unit must extend the full width of the door
opening.
The grille for directing exhaust air is
adjustable and is normally angled outwards to
achieve the best protection against incoming
cold air.
The air speed is adjusted to the desired
airflow.
The efficiency of the air curtain(s) depends
on the air temperature, pressure differences
across the doorway and any wind pressure.
NOTE! Negative pressure in the building
considerably reduces the efficiency of the air
curtain. The ventilation should therefore be
balanced!

Installation

The 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. The only visible part of the unit
is the underside that is level with the ceiling.
For the protection of wider doorways,
AR3500
Assembly and operating instructions
several units can be mounted next to each
other.
Ensure that the service hatch is accessible
and can be fully opened.
1. The mounting brackets (4x) are fixed to
the unit during transport. Slacken these off,
turn them around and screw into place on
the unit according to figure 1.
2. Hang up on threaded bars (M8) according to
figure 2a (not included).
3. Adjust the height using the lower nut so
that the frame is on the level of the ceiling.
Lock using the upper nut.
Mounting on threaded bars inside unit.
1. The mounting brackets (4x) are fixed 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 figure 2b (not included). Note that
the brackets are at different heights and
threaded rods shall be of different 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.
Electrical installation
The 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.
The control system is pre-installed in the
aircurtain with an integrated control card,
(see fig 5).
SIRe 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 fig. 3 and 5. See manual for SIRe.
1. The service hatch is opened by loosening
the snap fixings located on the down side
(turn 90°). See fig. 3.
2. AR3500A: The unit is fitted with cable and
plug.