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Application area
The Thermozone AC 400 air curtains are
intended for stationary installation above or
at the side of entrance and smaller doors with
a height of between 3 and 4.5 metres.
The Thermozone AC 400 is supplied with
or without heating elements. Electric heat
can be added to units without heat
afterwards.
The efficiency of the air curtains is
dependent on the difference of air pressure
and temperature (between the rooms that are
separeated by the air curtain) and pressure
caused by wind.
The protection class of AC 400 is IP 24,
drip-proof design.
Operation
The air is drawn in from the upper and under
side of the unit and is blown out at high
velocity across the doorway, providing a
protective air shield. The air shield
minimizes heat and cold air leakage.
When mounted on supplied brackets, the
units can be tilted in an angel where the size
of load on the door in question is taken into
account. The more load caused by negativ
pressure, temperature differences and wind,
the more should the air stream be directed
outwards.
The air flow is adjusted with a selector
(ACR304 eller ACR3042) to provide maxi-
mum protection to the opening.
Units with electric heat can be regulated
with the output selector EV300 in 3 stages
(0 - 1/2 - 1/1) and with a 2-stage thermostat,
KRT 2800.
NOTE! Air pressure imbalance between
rooms separated by air curtains, considerably
reduces the efficiency of the air curtain. The
ventilation should therefore be balanced!
Mounting
a) Above the doorway
• The unit is usually mounted inside the
doorway as close to the opening as
possible with the nozzle closest to the
opening.
• When used above interior freezer doors,
the unit should be mounted on the warm
side.
• To minimize air leakage between the units,
they should be mounted close to each
other. To reach the wall mounting
screws, a min gap of 50 mm between the
units is required.
20
Thermozone AC 400
Installation and Operating Instructions
• Attach the two (2) wall mounting brackets
securely to the wall or other suitable
structure. Attach the air curtain to the
brackets (Fig.1). The units are secured with
M10-screws in the centre hole of each
bracket and in one of the notches, thus
allowing the whole unit to be turned and
the angle of the air stream to be adjusted.
• Observe the minimum distances given in
fig.3 and also that the units may not be
mounted directly below a power outlet.
b) Under a roll-up door
The air curtains are installed on two
susepension beams (50x100mm) inside the
door. The ends of the beam rest on brackets
or consoles contstructed on-site. An adaption
set is available as an accessory, AXT401/
402, which takes the door´s folding radius
into account and positions the outlet
terminals close to the opening. The adaption
set is installed as set out in fig. 4 on page 2.
• The grille on the outlet terminal, which is
secured by two screws at each end, is
dismantled and then secured to the
adaption set.
• The front long side, which is secured using
four screws at each end, is dismantled and
replaced by the adaption set.
• The Z-plate is mounted on the rear long
side using the supplied self-tapping screws.
There are two markings on the the long
side that show how the Z-plate should be
secured.
c) Standing at the side of the doorway
• When space above the doorway is
limited, the units can be mounted standing
beside the opening, thus creating a side-
blowing air stream (fig.4). Mounting plates
AVMP300 are mounted between the units
and between the lowest unit and the floor.
• The units are mounted vertically inside the
doorway as close to the edge of the
opening as possible with the nozzle
closest to the opening.
• The mounting plate consists of two parts.
The outer one is secured to the floor (or at
the top of the lower unit) with the supplied
screws. The units are secured with M10-
screws in the centre hole of each bracket
and in one of the notches, thus allowing
the whole unit to be turned and the angle
of the air stream to be adjusted. The inner
part is mounted on the under side of the
unit that is standing on the floor. The plate
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