Frico HDI145 Original Instructions Manual page 38

Warning
If the safety thermostat goes into safety stop (lamp h),
push reset button (i) for 3 seconds to restart the heater.
Warning
NEVER do more than two restarts in a row: unburned fuel
can accumulate in the combustion chamber and suddenly
flare up at the next restart.
5.2. STOP
Stop the heater by turning switch (a) to "0" position or, if the heater
is in automatic mode, by setting the room thermostat to a lower
temperature: the burner shuts off and lamp (f) goes out. The fan
keeps working, starting and stopping several times until the
combustion chamber has cooled completely.
Warning
Never stop the heater by simply turning off the
disconnecting switch on the panel.
The electrical supply must be disconnected ONLY when
the fan has come to a complete stop.
5.3. VENTILATION
To run the heater only in continuous ventilation mode, turn switch
(a) to the position with the symbol V.
5.4. TEMPERATURE CONTROLLER
The heater is equipped with a temperature controller (g) with LCD
screen, which displays and controls the following parameters:
• Display of air outflow temperature
• Display of hours of operation
• Control of trip temperature of fan thermostat
• Control of trip temperature of burner thermostat
Display of air outflow temperature
The screen displays the measured temperature in [°C]:
Display of hours of operation
Press key (a) twice: the screen shows the operating time in hours
[h]:
Warning
The time shown is not actual heating time, but connection
time to the electrical power supply line.
Reset the counter as follows:
• Turn the heater's main switch to position "0" (OFF)
• Press button P on the temperature controller for at least 3
seconds: the word "PASS" will flash for 5 seconds
• Enter code "-481" by pressing key (b) several times until obtaining
EN
the number required; press key P to confirm and go to the next
number
• Lastly, press key U: the display again shows the air outflow
temperature
Control of trip temperature of fan thermostat
The temperature controller is programmed to start and stop the
main fan automatically when the combustion chamber reaches the
set temperature. This prevents cold air from blowing when the
burner starts and the combustion chamber is not yet hot enough,
and ensures that residual heat in the heater is dissipated when the
burner stops.
The temperature is factory-set to 35°C, with hysteresis of 5°C.
Red LED "OUT 1" shows the operating state of the fan thermostat:
• LED ON: the fan is on
• LED OFF: the fan is off
Control of trip temperature of burner thermostat
The temperature controller is programmed to start and stop the
burner automatically when the combustion chamber reaches the set
over-temperature. This prevents excessive overheating of the
combustion chamber and subsequent tripping of safety thermostat
L2, which blocks operation of the heater (see chapter 7 for details
on operating problems that cause tripping of safety thermostat L2).
The temperature is factory-set to 95 °C, with hysteresis of 5°C.
Red LED "OUT 2" shows the operating state of the burner
thermostat, while the LED group "- = +" indicates the current
temperature compared to the set temperature:
• if the red arrow at the symbol "-" is ON, it means that the
temperature is below the set value and, therefore, the thermostat
is ON, i.e., the burner is ON.
• if the green LED at the symbol "=1" is ON, it means that the
a
temperature is at the set value.
• if the red arrow at the symbol "+"is ON, it means that the
b
temperature is above the set value and, therefore, the thermostat
is OFF, i.e., the burner is OFF.
Warning
The trip temperatures of the fan thermostat and burner
thermostat should be changed only if absolutely
necessary. Contact the manufacturer for information
needed to reprogram the temperature controller..
Warning
All of the operations described in this section must be
performed by professionally qualified personnel only.
6. MAINTENANCE
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