Frico Thermozone AR300 Serie Mode D'emploi page 28

Connecting the water coil (AR300W)
The installation must be carried out by an
authorised installer.
The water coil has copper tubes with
aluminium ins and is suitable for connection
to a closed water heating system. The heating
coil must not be connected to a mains
pressure water system or an open water
system.
Note that the unit shall be preceded by a
regulating valve, see for instance Frico valve
kit.
To access the connections (DN20, 3/4",
inside thread) the service hatch and intake
grille must be opened. The water coil is
connected inside the unit through holes which
are made (during installation) on the upper
side or through the side of the unit, possible
places are marked with punch marks.
The connections to the heating coil must be
equipped with shut off valves to allow problem
free removal.
Adjustment of the air curtain and air low
The direction and speed of the air low should
be adjusted considering the load on the
opening. Pressure forces affect the air stream
and make it bend inwards into the premises
(when the premises are heated and the
outdoor air is cold).
The air stream should therefore be directed
outwards to withstand the load. Generally
speaking, the higher the load, the greater the
angle that is needed.
Basic setting fan speed
The fan speed when the door is open is set
using the speed control. Note that the air low
direction and speed may need ine adjustment
depending on the loading of the door.
Filter (AR300W)
The heat coil in distance, in combination
with the hole diameter of the intake grille,
protects against dirt and blockage and makes
a separate ilter unnecessary.
Service, repairs and maintenance
For all service, repair and maintenance irst
carry out the following:
1. Disconnect the power supply.
2. The service hatch is opened by loosening
AR 300 E/W
the snap ixings located on the down side
(turn 90°). See ig. 3.
3. After service, repairs and maintenance
close the service hatch and make sure that
the snap ixings lock properly.
Maintenance
Since fan motors and other components are
maintenance free, no maintenance other than
cleaning is necessary. The level of cleaning
can vary depending on local conditions.
Undertake cleaning at least twice a year. Inlet
and exhaust grilles, impeller and elements
can be vacuum cleaned or wiped using a
damp cloth. Use a brush when vacuuming
to prevent damaging sensitive parts. Avoid
the use of strong alkaline or acidic cleaning
agents.
Overheating
The air curtain unit with electric heater is
equipped with an overheat protector. If it is
deployed due to overheating, reset as follows:
1. Disconnect the electricity with the fully
isolated switch.
2. Allow the electrical coil to cool.
3. Determine the cause of overheating and
rectify the fault.
Reset is performed as follows:
1. Locate the red button inside the air curtain
unit. It is visible and accessible by opening
of the service hatch and inlet grille. The
button is on the left side seen from inside
the room looking out. On the 2 metre
variant, two red buttons are installed in the
middle of the unit.
2. Press the red button until a click is heard.
3. Connect the air curtain again.
All motors are equipped with an integral
thermal safety cut-out. This will operate,
stopping the air curtain should the motor
temperature rise too high. The cut-out
will automatically reset when the motor
temperature has returned to within the
motor's operating limits.
Fan replacement
1. Determine which of the fans is not
functioning.
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