Frico Thermozone AR300 Serie Mode D'emploi page 30

Control
The IR-eye is sensing if the door is open or closed. A thermostat is mounted in the air intake
and heat/no heat is activated with a push button on the control device on the unit. External
room sensor (AR300ERS) is available as an accessory. Alarm is indicated with a red LED .
Adjusting
The IR eye is mounted on the AR300. A
relector kit is also supplied (delivered in a
plastic bag). The relector kit is applied to the
door so that LED 1 (1) lights when the door
is closed. The door sensor (6) can be directed
up/down in 5 steps, to "locate" the relector
disk , see ig.6. The relector kit can be angled
in order for the IR-eye to "locate" it better.
See the chart and igure on page 4. Use the
cylinder included for this, which can be cut
into desired angle. If the distance between the
eye and the door is too far an external door
contact (AR300DS) should be used.
Test mode
There is a test mode to check that everything
functions.
1. Press the button (5) and hold it in until all
the LED´s illuminate. This shows that the
test mode is active. The unit is started at
low speed.
2. Press the button briely (5). The unit
increases to high speed.
3. Press the button once again (5). The unit
is running on high speed and half output
(AR300E) respectively the actuator is
opening the valve (AR300W).
4. Press the button once again. The unit
increases to high speed with full power.
(AR300E).
5. Press the button one last time (5). The test
is complete.
Heat/no heat mode
There is a possibility to choose between heat
mode and no heat mode (heat is blocked)
using button (5). LED 2 (2) is lit when the
heat mode is active.
Function - open door
The thermostat is set to the desired room
temperature using the thermostat knob inside
the unit. The desired high speed is set using
the speed selector.
AR 300 E/W
The fan runs at high speed and the heat at
full power when the temperature is less than
the desired temperature +2 degrees . When
the temperature is above the desired value +2
degrees, the fan runs at high speed and the
heat is switched off.
When the door is closed the unit continues
to run on high speed for 60 s and another 60 s
on low speed and then switched off.
Function - closed door
The thermostat is set to the desired room
temperature using the thermostat knob inside
the unit.
If the temperature falls below the desired
temperature, the fan starts at low speed and
the heat at half power, if the temperature
drops below 2 degrees below the desired
temperature, the fan starts at the previous
set high speed (for open door) and heat at full
power.
Alarm
There is a potential free contact (normally
open) for alarm indication
LED 3 is lit when there is an alarm (3).
Summation alarm consisting of two
temperature sensors.
Alarm is indicated if:
1. The unit is calling for heat but the
difference between outlet temperature and
the room temperature is less than 5 degrees
after 90 s.
2. The heat is switched off but the difference
between the outlet temperature and the
room temperature is more than 5 degrees
after 90 s.
3. The internal temperature in the unit is
exceeding 50 °C.
Check the motors and that the air supply
is suficient (grille not blocked). Also check
incoming water temperature and that the
valves opens and closes. Stop the alarm by
disconnecting the power supply to the unit.
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