Accorroni GHIBLI 4-5-6 ELITE, Technical Information

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2. CONTROL AND SAFETY DEVICES
2.1 GAS CONTROLLER
This device is housed in a heat-resistant and
shockproof plastic enclosure and is mounted on
the air heater electric board
(fig. 7) .
The control device operates on the ionisation
flame detection principle, using a special probe
on the burner.
The detection circuit must be fed with single-
phase 230 V
~ 50 Hz mains voltage. The
circuit is sensitive to the phase-neutral
polarity. If this is reversed, the device will
lock out within the safety time, even if the
flame has a regular shape (for special cases
consult our Technical Office).
2.2 GAS VALVE
The gas valve includes two, direct operation
solenoid valves with class B closing devices
(maximum pressure 50 mbar) and a pressure
regulator. The die-cast aluminium casing is
equipped with 3/8 RP threaded gas inlet and
outlet connections and two inlet and outlet
pressure test points. The gas valve is also
equipped with an inlet filter
(fig. 22) .
2.3 FAN THERMOSTAT
This thermostat controls fan operation, making
it start when the exchanger has reached the
rated operating temperature and stopping it
when the exchanger has adequately cooled.
The thermostat is attached to a threaded support,
located on the exchanger
(fig. 8) .
2.4 SAFETY THERMOSTAT
The thermostat is designed to interrupt burner
operation when the air temperature in the air
heater reaches a set value, i.e. when the
exchanger overheats due to insufficient air flow
or a fan malfunction. The thermostat enclosure
uses a special support to attach to the front
shield of the appliance
(fig. 9) .
Fig. 7
GAS CONTROLLER
Fig. 9
SAFETY THERMOSTAT
Thermostat
Electric
connection
Fig. 8
FAN THERMOSTAT
Threaded attachment
Electric connection