Thermozone AC 300
Application area
The Thermozone AC 300 air curtains are
intended for stationary installation above or
at the side of entrance and smaller doors with
a height between 2.5 and 3.5 metres.
The Thermozone AC 300 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 300 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 directed with regard to the size
of load on the door in question. 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.
• Attach the two (2) wall mounting brackets
securely to the wall or 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) 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 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 in 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 unit
that is standing on the floor. The plate is
secured with 3 M10-screws in the
prepared screw holes.
• Lift the unit on to the plate and screw the
plates together. Maximum building height
for vertical units is 3.5 metres.
• At the end of the uppermost unit, one of
the supplied mounting consoles (or other
suitable strut) is mounted and then
attached to the wall in order to secure the
top of the tower.
• We recommend that the collision
protection AXP300 is mounted to prevent
the units from being hit by trucks and
similar.
• Mount the air flow selector ACR304 or
ACR3042 withing easy reach for
controlling the air curtains.
• To control units with electric heat, the
output selector EV300 is mounted in
conjunction with the speed selector and a
thermostat (for ex. KRT2800), in such a
place that changes of the temperature
close to the opening, can be quickly
detected.
Installation and Operating Instructions
GB
20
