Limit Thermostat; Expansion Vessel - E.C.A. Fortius Service Manual

LIMIT THERMOSTAT

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The limit thermostat used is bimetal type. When water CH from the heat-exchanger exceeds 105°C,
the limit thermostat opens and cuts the signal sent to the main board and ensures safety. When the
water temperature is below 75 °C, the limit thermostat closes enabling the boiler to operate again
after the reset. In bithermic types, limit thermostat is mounted on the heat-exchanger with a metal
clip while in monothermic types it is mounted using two screws.

EXPANSION VESSEL

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Expansion vessel covers the expansion of water in the central heating circuit which is a closed
circuit.
Table 15 Expansion Vessel
Expansion Vesssel Volume
Water Inlet Connection
fig. 14 Limit Thermostat
8 liters
G ½" (external thread)
fig. 15 Expansion Vessel
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