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Installation and operating instructions
General Instructions
Read these instructions carefully prior to
installation and use. Keep this manual for future
reference.
The product may only be used as set out in
the assembly and operating instructions. The
guarantee is only valid should the product be
used in the manner intended and in accordance
with the instructions.
Application area
4000 Series is an air curtain for recessed mounting.
The air curtain is available without heat, with
electrical heating and with water heating.
Recommended installation height up to: 13.1 feet.
Protection class: IP20.
Mounting
The air curtain is installed horizontally with the
outlet 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
which is level with the ceiling. The service hatch
must be accessible, nothing should prevent it
being fully opened.
The unit is ready for suspension with threaded bars
on its outside. The threaded bars can also be fixed
on the inside of the unit e.g. when mounted on a
solid suspended ceiling.
Operation
Air is drawn in from underneath and blown
downwards shielding the door opening and
minimizing heat loss. To achieve the optimum
curtain effect the unit must extend the full width of
the opening.
The grille for directing the outlet air is adjustable
and is normally angled outwards to achieve the
best protection against incoming air.
The efficiency of the air curtain depends on the
air temperature, the pressure differencial across
the doorway and any wind load.
NOTE! Negative pressure in the building
considerably reduces the efficiency of the air
curtain. The ventilation should therefore be
balanced.
Electrical installation
The installation, which should be preceded by
an isolator switch with a contact separation of at
least 0.12 in, should only be wired by a licensed
electrician and in accordance with the NEC and
the local electrical codes and regulations. The
control system is pre-installed in the air curtain with
an integrated control card. Controller is supplied
pre-programmed with quick-fit connections.
Modular cables are connected to the control
board. Fig. 4 . See manual for controller.
1. The service hatch is opened by loosening the
snap fixings located on the bottom of the unit
[turn 90°]. Fig. 3 .
2. The unit is connected via the cable gland on
one side of the unit or its top.
Unit without heating or with water heating
Connected via the built-in controller control
board with cord without plug [in the terminal box
at delivery].
For the protection of wider doorways, several
units can be mounted in series alongside each
other. Minimum distance from outlet to floor for
electrically heated units is 70.9 in.
Mounting on threaded bars outside the unit
1. The mounting brackets are fixed to the unit
during transport. Loosen these, turn them
around and screw into place on the unit
according to fig. 1a.
2. Hang on threaded bars [M8] according to fig.
1b [accessory].
3. Adjust the height using the lower nut so that the
frame is level with the ceiling. Lock using the
upper nut.
Mounting on threaded bars inside the unit
1. Hang on threaded bars [M8] according to fig. 2
[accessory].
2. Adjust the height using the lower nut so that the
frame is level with the ceiling. Lock using the
upper nut.