Adjustment And Safety Devices; Pump Capacity/ Head - Baxi Luna Platinum+ Gebrauchsanleitung

18. ADJUSTMENT AND SAFETY DEVICES

The boiler has been designed in full compliance with European reference standards and in particular is equipped with the following:
• Safety thermostat
This device has a sensor positioned on the left section of the flue extraction hood and shuts off the gas flow to the burner if the
flue duct is obstructed or in the event of draught failure.
It is forbidden to disable this safety device
• NTC fumes probe
This device is positioned on the fumes-water exchanger. The electronic board stops gas from flowing to the burner in case of over
heating.
The above reset operation is only possible if the temperature is less than 90°C.
It is forbidden to disable this safety device
• Flame ionisation detector
The flame sensing electrode guarantees safety of operation in case of gas failure or incomplete ignition of the main burner. In
these conditions, the boiler blocks.
• Hydraulic pressure switch
This device allows the main burner to be ignited only if system pressure is higher than 0.5 bars.
• Pump post-circulation
The electronically-controlled pump post-circulation function lasts 3 minutes and is enabled, in the heating mode, if the ambient
thermostat causes the main burner to go out.
• Frost protection device
The electronic boiler management system includes a "frost protection" function for the heating and DHW systems which, when
flow temperature falls below 5°C, operates the burner until a flow temperature of 30°C is reached. This function is enabled when
the boiler is switched on, the gas supply is open and the system is correctly pressurised.
• Anti-block pump function
If no heat demand is received in the heating and/or DHW modes for 24 consecutive hours, the pump will automatically start and
operate for 10 seconds.
• Three-way valve anti-blockage function
If no heat demand is received for a period of 24 hours, the three-way valve performs a complete switching cycle.
• Hydraulic safety valve (heating circuit)
This device is set to 3 bar and is used for the heating circuit. Connect the safety valve to a drain trap. Do not use it to drain the
heating circuit.
• Heating pump pre-circulation
In case of a heat demand in the heating mode, the appliance can pre-circulate the pump before the burner is ignited. This pre-
circulation phase last from a few seconds to a few minutes, depending on the operating temperature and installation conditions.

19. PUMP CAPACITY/ HEAD

A high-head modulating pump is used (the chart in annex "SECTION" E shows the modulating range from the minimum to the
maximum value) suitable for use on any type of one- or two-pipe heating system. The automatic air valve incorporated in the pump
allows quick venting of the heating system.
KEY TO PUMP CHARTS - "SECTION" E
Q
RATE OF FLOW
H
HEAD
MIN
Minimum speed of modulation
MAX
Maximum speed of modulation
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