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7) High Limit Lamp
If this lamp is illuminated, the high limit thermostat has tripped. Press the high
limit reset (2).
8) Burner Lockout Lamp
If this lamp is illuminated, the burner has locked out after failing to fire. Press the
red reset button on the front of the burner. Please refer to the instructions in
Section 1.2.
9) Low Pressure Lamp
If this lamp is illuminated, the system pressure has fallen below 0.3 bar. Please
refer to the instructions in Sections 1.3 and 1.4. Additionally, top up the pressure
until the light goes out then release pressure via the pressure relief valve until the
system pressure is 1 bar when the boiler is cold.
10) Eco Mode Lamp
If this lamp is illuminated, it indicates Eco mode is available. Eco mode only
applies to domestic hot water production. Eco mode can be turned on or off using
the Eco mode switch (3).
1.7 Thermostatic Mixing Valve
The thermostatic mixing valve is used to adjust the temperature of the domestic
hot water supply from the Combi boiler. The mixing valve knob can be rotated
toward the ‘Min’ position to reduce hot water temperature, and toward the ‘Max’
position to increase hot water temperature according to User needs.
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