Fan Thermostat; Safety Thermostat - Accorroni MEC25-85 Technical Information

The pressure switch is mounted on the air heater
electric board and is connected by a silicon tube
to a pressure fitting on the exchanger to detect the
differential pressure on the combustion circuit. A
set screw, located on the front of the device, is
used for calibration, which is performed in the
factory, according to the appliance model, and
locked with a seal (fig. 14).

2.4 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 an
element of the exchanger (fig. 15).

FAN THERMOSTAT

Threaded attachment
Electric connection

2.5 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 is attached
to the electric board inside the air heater service
door. The sensitive bulb, connected to the
thermostat enclosure by a capillary tube, is located
in front of the exchanger, on a special support
bracket (fig. 16).
Bulb sensor
Thermostat enclosure
Fig. 15
page 20

SAFETY THERMOSTAT

Electric connection
Fig. 16