Frico Thermozone AC 300, Installation And Operating Instructions Manual

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Thermozone AC 300
• 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.
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 37 mm and 3 pcs ø 29
mm. 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 308 8 230V 3~ 4
AC 308 8 400V 3~ 2,5
AC 312 12 230V 3~ 10
AC 312 12 400V 3~ 4
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.
If there is no heat, check the following:
a) Power supply to electric heater; check
fuses and circuit-breaker (if any).
b) Thermostat settings and actual
temperature.
c) That the output selector (if any) is set
correctly.
d) That the overheat protection has not
been released. If so, please check
description on next page.
Overheating
(applies to units with electric heat)
The Thermozone is equipped with an
overheat protector. If it is released due to
overheating, reset as follows:
a) Disconnect the electricity with the fully
isolated switch.
b) Investigate the matter and repair the
fault.
c) Reset is performed as follows:
• Dismount the service hatch on the
underside of the unit.
• Locate the red buttons.
• Press the buttons until a click is heard
(you do not need to press them
simultaneously).
d) Connect the Thermozone again.
If the error cannot be fixed, please contact
qualified service technician.
GB
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