Thermozone AC 400
is secured with 3 M10-screws in the
prepared screw holes.
• Lift the unit onto 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
barrier AXP300 is mounted to prevent
the units from being hit by trucks and
other vehicles.
• Mount the air flow selector ACR304 or
ACR3042 within 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 (e.g. KRT2800), in such a
place that changes to the temperature
close to the opening quickly can be
detected.
• When mounting vertically, draught can
occur due to rotating air. The mounting of
a narrow wall at the side of the opening
(the side where no units are mounted),
can decrease the rotation.
On delivery, the inlet air grille is found on the
top side of the unit. By loosening the screws
on either side of the unit, the inlet air section
may be turned around so that the inlet air
grille instead points downwards.
Electrical installation
The electrical installation should be carried
out by a qualified electrician in conformity
with prevailing regulations. The appliance
should be preceded by a triple pole switch
with at least 3 mm breaking gap.
Different alternatives for air flow
regulation are possible, see wiring diagram
pages 4–7.
The hatch on the underside of the unit is
opened by turning the locking pins 1/4 of a
lap. The connection should be made with a
cable type S05VV-U, A05VV-R or similar.
On the upper side of the unit there are
knock-outs, 2 pcs ø 29 and 4 pcs ø 23. The
cable-glands used must guarantee the
protection class requirements!
Type
Power
Voltage
Min. area
kW
V
mm
2
All control
230V
1,5
AC 412
12
230V 3~
10
AC 412
12
400V 3~
4
AC 418
18
230V 3~
16
AC 418
18
400V 3~
10
For the units with electrical heating, the
power and voltage should be supplied in
different connection areas (see wiring
diagram).
In the distribution board it is to be
indicated that
”The air curtains can be
supplied from more than one connection”.
Adjusting the unit and the air stream
Direction and speed of the air stream should
be adjusted with regard to the load on the
door. Pressure forces the air stream to bend
towards the interior of the room (when the
room is heated and the outside is cold). To
withstand the load, the air stream should be
directed outwards. An angel up to 15° can
be recommended. The more load caused by
negativ pressure, temperature differences
and wind, the more should the air stream be
directed outwards.
A baffle on each side of the doorway will
improve the efficiency of the air curtains.
When used above freezer or cooler doors,
the units should be mounted on the warm
side with the air stream directed 0–10°
towards the warm side.
Basic air flow settings
The air flow is set with the air flow selector
so that the speed of the air is 3–4 m/s 1 m
above the floor. The direction of the air
stream and the air speed may need to be
adjusted more exactly depending on the
load on the door.
Trouble shooting
If the fans stand still, check the following:
a) Power supply; check fuses, circuit-breaker,
time switch (if any) that starts and stops
the unit.
b) That the air flow selector is correctly set.
c) That the position limit switch is working
(if any).
If the error cannot be fixed, please contact
qualified service technician.
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