LIMIT THERMOSTAT
15
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.
fig. 14 Limit Thermostat
EXPANSION VESSEL
16
Expansion vessel covers the expansion of water in the central heating circuit which is a closed
circuit.
Table 15 Expansion Vessel
Expansion Vesssel Volume 8 liters
Water Inlet Connection G ½” (external thread)
fig. 15 Expansion Vessel
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