Ariston 47-116-13, 41-116-01, 47-116-08. 47-116-09 installation instructions Boiler Safety Systems

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3.8Boiler Safety Systems

The boiler is equipped with the following safety systems (see section 3.3 for references):

1. - Ignition Failure

This control signals an ignition failure on the burner 7 seconds after a lighting failure. The L.E.D. “B” will turn on to signal the shutdown status.

The system can be reset by pressing and releasing the button “A” after checking to make sure that the gas valve is open. Repeat this process until the burner lights.

2. - Circulation Failure

This control signals that the safety pressure switch on the primary circuit has not sensed a pressure of at least 1 bar within 40 seconds of the activation of the circulation pump, it shuts off the boiler and lights the L.E.D. “D” The system can be reset (after the pressure has been brought up to the proper level) by using the On/Off switch “L”.

3. - Overheating

This control shuts off the boiler in the case where the primary circuit reaches a temperature in excess of 110°C. The L.E.D. “G” will come on to signal this shut- off status. After the system has been allowed to cool, the system can be reset by pressing the button “A”.

4. - Limescale Build-up

This is an indirect control (actuated through the regulation of the temperature in the primary heat exchanger) on the formation of limescale in the secondary heat exchanger. Regardless of the flow rate and the temperature in the circuit for the domestic hot water, the temperature is limited to 62°C.

5. - Anti-frost Device

The boiler is equipped with a device that automatically lights the main burner when the temperature in the delivery line to the system drops below 5°C. The boiler will continue to operate until the temperature in question reaches about 58°C.

This device is activated on a properly operating boiler if:

-the system pressure is between the acceptable values;

-the power supply to the unit is on;

-the unit is supplied with gas.

This feature is enabled also when the boiler is in summer operating mode.

6. - Safety Shut-off

At the start of every lighting phase, the P.C.B. performs a series of internal controls. If a malfunction occurs, the boiler will shutdown until the problem has been resolved.

3.9 Draining the System Draining the heating system.

The heating system must be emptied as follows: - Turn off the boiler;

-Open the drain valve for the system and place a container below to catch the water that comes out;

- Empty the system at the lowest points (where present). If you plan on not using the heating system for an extended period of time, it is recommended that you add antifreeze with an ethylene glycol base to the water in the heating lines and radiators if the ambient temperature drops below 0°C during the winter.

This makes repeated draining of the entire system unnecessary.

Draining the domestic hot water system.

Whenever there is the danger of the temperature dropping below the freezing point, the domestic hot water system must be drained as follows:

- Turn off the general water valve for the household plumbing system; - Turn on all the hot and cold water taps;

- Empty the remaining water from the lowest points in the system (where present).

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Contents Leave These Instructions Adjacent to the GAS Meter Table of Contents General Information General InformationTechnical Information Genus 27 Rffi System Overall ViewInstallation Reference StandardsSiting the Appliance Overall Dimensions ClearancesMounting the Appliance Electrical ConnectionGas Connection Safety Valve Discharge Water Connections View of the Boiler ConnectionsPipe Work By-passFlue Connections Air Release PointsMains Water Feed Central Heating FillingTower Flue Components 80 mm B004 KW 27 kW Exhaust/Air Maximum Extension Room Thermostat Connection Electrical Diagram ColoursGenus 27 Rffi System CN202 Water Circuit Diagram Commissioning Initial PreparationRemoving the Casing Filling the Heating SystemControl Panel Summer/Winter/Flue Analysis ModesInitial Start-up Operational Adjustments Checks to be run before initial start-up are as followsCombustion Analysis Fume Discharge MonitoringBoiler Safety Systems GAS Adjustments Changing the Type of GasMaintenance Wiring Diagram for Two Heating Zones MiscellaneousWiring Diagram for Connection to Ariston Unvented Cylinder TypicalB004 B004 B004 Technical Service Hotline 01494

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