Westen Quasar E - Us E R & I N S T a L Le R ( en ); 16 Adjustment and Safety Devices; 17 Pump Capacity; Head; 18 Annual Servicing

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I N S TA L L E R S e c t i o n ( e n )
16. ADJUSTMENT AND SAFETY DEVICES
The boiler has been designed in full compliance with European reference standards and in particular is equipped with the following:
• Limit thermostat
Thanks to a sensor placed on the CH ow line, this thermostat interrupts the ow of gas to the burner if the water in the primary
circuit overheats. In these conditions, the boiler is blocked and only after the fault has been eliminated can it be ignited again by
pressing for at least 2 seconds.
It is forbidden to disable this safety device.
• Electronic fumes outlet control
The boiler is tted with an electronic function which controls the fumes outlet.
• Flame ionisation detector
The ame sensing electrode, located in the centre of the burner, guarantees safety of operation in case of gas failure or incomplete
ignition of the burner.
In these conditions, the boiler is blocked after 3 ignition attempts.
Press for at least 2 seconds to re-establish normal operating conditions.
• Hydraulic pressure switch
This device allows the main burner to be ignited only if system pressure is higher than 0.5 bar.
• Heating circuit 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 burner to go out.
• Anti-freeze device (heating circuit)
The electronic boiler management system includes a “frost protection” function for the heating system which, when delivery
temperature falls below 5°C, operates the burner until a delivery 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.
• Water not circulating in primary circuit (pump probably blocked)
If there is insufcient or no water circulating in the primary circuit, the boiler blocks and the error code E25 is shown on the display.
• Pump anti-block 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.
This function is operative when the boiler is powered.
• 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.
17. PUMP CAPACITY/ HEAD
This is a high static head pump t for installation on any type of single or double-pipe heating systems. 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
18. ANNUAL SERVICING
If the boiler was operating, wait for the combustion chamber and pipes to cool down.
Before commencing any maintenance operations, make sure the boiler is disconnected from the power supply. Afterwards,
move the knobs and/or operating parameters of the boiler to their original positions.
Do not clean the boiler with abrasive, aggressive and/or easily ammable substances (such as petrol, acetone, etc.).
To optimise boiler efciency, carry out the following annual controls:
• Check the appearance and airtightness of the gaskets of the gas and combustion circuits;
• Check the state and correct position of the ignition and ame-sensing electrodes;
• Check the state of the burner and make sure it is rmly xed;
• Check for any impurities inside the combustion chamber. Use a vacuum cleaner to do this;
• Check the gas valve is correctly calibrated;