SYMBOLS The following symbols are used in these instructions: Essential instruction for operating the system correctly. Essential instruction for personal safety or environmental protection. Danger of electrocution. Risk of scalding. CERTIFICATION The appliances carry the “CE” mark, in accordance with the standards in force in the various countries (European Directives 92/42/CEE “Efficiency” and 90/396/CEE “Gas Appliances”). They also carry the labels, “HR+”. INTRODUCTION GENERAL INFORMATION AND SAFETY INSTRUCTIONS IF YOU SMELL GAS: -Immediately shut off the gas supply. -Ventilate the boiler room. -Do not use electrical appliances and do not switch anything on or off. - Immediately notify your gas company and/or your installer. General information This documentation forms part of the items delivered with the appliance and must be given to the user to keep in a safe place! This appliance must be serviced and repaired by an approved installer, in accordance with current standards in force. ACV declines all liability for any damage caused as a result of incorrect installation or as a result of the use of components or connections that are not approved by ACV for this application. Temperatures This boiler is designed for central heating systems with a maximum outlet temperature of 90°C. Therefore, the central heating pipelines and the radiators must reach this temperature. The waste-gas pipe lines must reach temperatures in excess of 100°C. The hot water can reach temperatures in excess of 60°C. Installation Before installing and commissioning the boiler, first carefully read this manual. Position the HeatMaster® according to the safety rules and standards in force. You must comply with the ventilation requirements for the room where appliances of this type are installed. All air vents must remain unobstructed at all times. It is prohibited to modify the interior of the appliance in any way, without the manufacturer’s prior written agreement. Service In order to ensure the appliance operates safely and correctly, it is important to have it serviced and reconditioned every year by an installer or an approved service company. Faults Despite the strict quality standards imposed on its appliances by ACV during production, inspection, and transport, faults may occur. Please immediately inform your approved installer about such faults. Remember to give the fault code as it appears on the screen. (See also the list of faults on page 16) Only genuine factory parts may be used as replacement parts. Please go to page 22 for a list of spare parts and their ACV reference numbers. Note:ACV reserves the right to change the technical characteristics and specification of its products without notices. USING THE BOILER Starting the burner During operation, the burner starts automatically as soon as the temperature of the boiler is below the set point and goes off when this value is reached. Control panel Main switch Summer/Winter switch Thermostat-pressure gauge Display – MCBA controller The user must not attempt to gain access to the components inside the control panel. Heating system pressure From time to time you may need to top up the heating system pressure. This pressure is indicated by the combined temperature and pressure gauge on the boiler control panel. The minimum pressure when the boiler is cold should be 1 bar. The precise operating pressure required depends on the height of the building, and your installer will have informed you of this value at the time of installation (see Commissioning Section - Filling the hot water and heating circuits). If the pressure falls below 1 bar, the boiler water pressure switch will turn the boiler off until pressure is restored. To re-pressurise, the system needs to be topped up with water. First, switch the boiler OFF on the on/off switch and isolate the external electrical supply. The fill valves A and B are located at the rear of the HeatMaster® (see photo A and B below).Open both valves and allow thesystem to fill. When the combined temperature and pressure gauge shows the required pressure, close both valves. Replace the casing top front panel. Restore the power supply and switch the boiler on. AB Safety Valves If water discharges from any of the safety valves, switch the boiler off and call a service engineer. 3 USER GUIDE 1 Reset Status T° 1 X 1 X Mode Step 2 X Mode Store 1 X Store 1 X Stand by mode Stand by mode SETTING THE PARAMETERS Setting the temperature of the hot water: (Temperature of the hot water) - Press “Mode”: “PARA” comes up on the screen. - Press “Step”: the first digit is 1 and the last two digits indicate the current temperature setting for the hot water. - To change this temperature, press the “+” or “-” keys until the temperature indicated by the last two digits is the desired temperature. - Press “Store” to save the setting. - Press “Mode” twice to return to Standby mode (normal operating mode). Enabling and disabling hot water mode: (hot water) - Press “...