Service Checklist for annual maintenance Check the following elements at least once a year: – Visual inspection of the general state of the system. – Carry out a general inspection of the system operation. – Outdoor unit heat exchanger. The heat exchanger of the outdoor unit may be obstructed by dust, dirt, leaves, etc. A heat exchanger lock-out can lower or raise the pressure levels excessively; if the unit works in these conditions, the performances will deteriorate with respect to the declared values. Remove the obstructions, if present. – Front grille of the outdoor unit. The front grille of the outdoor unit can get clogged. Remove the obstructions, if present. – Plumbing connections. Visually inspect the entire insulation of the pipe and plumbing connections to identify any leakages. Replace the seals if necessary. – Water pressure. Check that the water pressure value is between 0.1 MPa (1 bar ) and 0.2 MPa (2 bar). – Expansion vessel. Check the pre-charge pressure of the expansion vessel and replenish it if it is too low or replace it if damaged. – Water filter (if installed). Clean the water filter frequently to remove any residues. – Multi-function magnetic filter. Following a prolonged shutdown, dirt residues may deposit in the system and clog the filter. We therefore recommend verifying the condition of the filter in these situations. Check that both parts of the magnetic filter are tightly screwed on. To clean the filter a 3/4"-diameter hose is required for draining the water. Use an intermediate hose connection to connect the hose. Proceed as follows: – Loosen the ring nut (1) using the relevant tool. – Remove the side band (2). – Fasten the relevant hose connector (3) to the outlet (4) and connect the pipe (5). – Open the valve (6). Note: with column-type units, use the hose connector installed on the indirect cylinder discharge outlet. a 1 4 3 7 2 6 5 Fig. 87 The filter must be opened only during extraordinary maintenance when the filter is clogged. To clean the metal mesh, proceed as follows: – Loosen ring nut (7) and, using the relevant tool, remove the lower part of the filter to access the metal mesh. – Remove the metal mesh and clean it. – Mount the metal mesh back on and screw the lower part of the filter back on. – Safety valve discharge pipe. Check that the pipe of the overpressure valve is properly positioned for draining the water and removing any obstructions. – Abnormal noises/vibrations of the outdoor unit. Check the noise level of the outdoor unit: if it appears to be abnormal (for example, due to contacts or rubbing between metal parts), check the tightness of the screws and of the vibration-damping supports and the spacing between pipes (especially those with reduced diameter, such as the capillary pipes in the evaporator). 68 / EN
Service – Automatic deaeration valve. To check the condition of the discs, it is necessary to access the upper part of the valve and dismantle it. If the disc appears to be damaged and/or has expanded to the point of obstructing (even partially) the air outlet hole, it must be replaced. The discs tend to wear out more when the supplementary heating element is used frequently. – Automatic deaeration function. Remove all the air present in the hydraulic circuit. Upon the initial start-up, an automatic deaeration cycle of the system will start. During the maintenance phase it is possible to set the Air Purge Function 1.12.0 to start an automatic deaeration cycle. The air purge cycle should be repeated whenever the deaeration does not appear to have been sufficient. Checklist for annual maintenance of the electrical connections. Check the following elements at least once a year: – Electrical panels Open the electrical panels of the outdoor and indoor units and perform a visual inspection to verify that there are no evident defects, particularly with regard to the terminal boards. Check the tightness of the connection wire by wire so as to avoid potential loosening of any connection. In no case must there be any wires that are not connected to a terminal. – Cabling Check that all cable connectors are appropriately connected to their respective boards and that no elements are disconnected. – Supply voltage check. – Electrical absorption check. Checklist for annual maintenance of the domestic hot water storage tank (if included in the system). Check the following elements at least once a year: – Limescale removal. When using the device with very hard water, it is advisable to use an adequate scale remover. a – Safety valve (if installed). The safety valve is used to protect the storage tank and the heat exchanger for domestic hot water production against overpressure. Consequently, its operation must be checked frequently and it must be inspected to ensure that it is not obstructed by limescale deposits of other residues. When expansion vessels are used, the safety valve is normally not subject to stress. However, over an extended period of time, it may stop working. Replace it if it is damaged. It is normal that water drip from the overpressure safety device when the appliance is heating. For this reason one must install a drain, open to the air, with a continuously downwards sloping pipe, in an area not subject to subzero temperatures. – Active anode (if installed). Permanent protection is ensured by the PRO-TECH anode connected electrically. Replace it if it is damaged. – Passive anode (if installed). Dismantle the magnesium anode and check its condition. Replace it if it is very eroded. – Hydraulic safety assembly (if installed). For countries that have implemented the EN 1487 European standard, domestic storage water heaters and similar appliances must be connected to the mains water using an appropriate hydraulic safety assembly. The hydraulic safety assembly supplied with the appliance (if present) does not conform to this standard; it is therefore necessary to install an additional device supplied as an accessory. If installed, periodically check that the drainage pipe is adequately positioned for draining water (refer to the installation instructions) and remove any obstructions. – Risk of freezing. If there is a risk of frost, the tank must be heated or emptied completely. – Cleaning of external parts. The external parts must be cleaned with a damp cloth. Avoid using solvents or detergents. Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work. EN / 69
Service Checklist for annual maintenance Check the following elements at least once a year: – Visual inspection of the general state of the system. – Carry out a general inspection of the system operation. – Outdoor unit heat exchanger. The heat exchanger of the outdoor unit may be obstructed by dust, dirt, leaves, etc. A heat exchanger lock-out can lower or raise the pressure levels excessively; if the unit works in these conditions, the performances will deteriorate with respect to the declared values. Remove the obstructions, if present. – Front grille of the outdoor unit. The front grille of the outdoor unit can get clogged. Remove the obstructions, if present. – Plumbing connections. Visually inspect the entire insulation of the pipe and plumbing connections to identify any leakages. Replace the seals if necessary. – Water pressure. Check that the water pressure value is between 0.1 MPa (1 bar ) and 0.2 MPa (2 bar). – Expansion vessel. Check the pre-charge pressure of the expansion vessel and replenish it if it is too low or replace it if damaged. – Water filter (if installed). Clean the water filter frequently to remove any residues. – Multi-function magnetic filter. Following a prolonged shutdown, dirt residues may deposit in the system and clog the filter. We therefore recommend verifying the condition of the filter in these situations. Check that both parts of the magnetic filter are tightly screwed on. To clean the filter a 3/4"-diameter hose is required for draining the water. Use an intermediate hose connection to connect the hose. Proceed as follows: – Loosen the ring nut (1) using the relevant tool. – Remove the side band (2). – Fasten the relevant hose connector (3) to the outlet (4) and connect the pipe (5). – Open the valve (6). Note: with column-type units, use the hose connector installed on the indirect cylinder discharge outlet. a 1 4 3 7 2 6 5 Fig. 87 The filter must be opened only during extraordinary maintenance when the filter is clogged. To clean the metal mesh, proceed as follows: – Loosen ring nut (7) and, using the relevant tool, remove the lower part of the filter to access the metal mesh. – Remove the metal mesh and clean it. – Mount the metal mesh back on and screw the lower part of the filter back on. – Safety valve discharge pipe. Check that the pipe of the overpressure valve is properly positioned for draining the water and removing any obstructions. – Abnormal noises/vibrations of the outdoor unit. Check the noise level of the outdoor unit: if it appears to be abnormal (for example, due to contacts or rubbing between metal parts), check the tightness of the screws and of the vibration-damping supports and the spacing between pipes (especially those with reduced diameter, such as the capillary pipes in the evaporator). 68 / EN
Service – Automatic deaeration valve. To check the condition of the discs, it is necessary to access the upper part of the valve and dismantle it. If the disc appears to be damaged and/or has expanded to the point of obstructing (even partially) the air outlet hole, it must be replaced. The discs tend to wear out more when the supplementary heating element is used frequently. – Automatic deaeration function. Remove all the air present in the hydraulic circuit. Upon the initial start-up, an automatic deaeration cycle of the system will start. During the maintenance phase it is possible to set the Air Purge Function 1.12.0 to start an automatic deaeration cycle. The air purge cycle should be repeated whenever the deaeration does not appear to have been sufficient. Checklist for annual maintenance of the electrical connections. Check the following elements at least once a year: – Electrical panels Open the electrical panels of the outdoor and indoor units and perform a visual inspection to verify that there are no evident defects, particularly with regard to the terminal boards. Check the tightness of the connection wire by wire so as to avoid potential loosening of any connection. In no case must there be any wires that are not connected to a terminal. – Cabling Check that all cable connectors are appropriately connected to their respective boards and that no elements are disconnected. – Supply voltage check. – Electrical absorption check. Checklist for annual maintenance of the domestic hot water storage tank (if included in the system). Check the following elements at least once a year: – Limescale removal. When using the device with very hard water, it is advisable to use an adequate scale remover. a – Safety valve (if installed). The safety valve is used to protect the storage tank and the heat exchanger for domestic hot water production against overpressure. Consequently, its operation must be checked frequently and it must be inspected to ensure that it is not obstructed by limescale deposits of other residues. When expansion vessels are used, the safety valve is normally not subject to stress. However, over an extended period of time, it may stop working. Replace it if it is damaged. It is normal that water drip from the overpressure safety device when the appliance is heating. For this reason one must install a drain, open to the air, with a continuously downwards sloping pipe, in an area not subject to subzero temperatures. – Active anode (if installed). Permanent protection is ensured by the PRO-TECH anode connected electrically. Replace it if it is damaged. – Passive anode (if installed). Dismantle the magnesium anode and check its condition. Replace it if it is very eroded. – Hydraulic safety assembly (if installed). For countries that have implemented the EN 1487 European standard, domestic storage water heaters and similar appliances must be connected to the mains water using an appropriate hydraulic safety assembly. The hydraulic safety assembly supplied with the appliance (if present) does not conform to this standard; it is therefore necessary to install an additional device supplied as an accessory. If installed, periodically check that the drainage pipe is adequately positioned for draining water (refer to the installation instructions) and remove any obstructions. – Risk of freezing. If there is a risk of frost, the tank must be heated or emptied completely. – Cleaning of external parts. The external parts must be cleaned with a damp cloth. Avoid using solvents or detergents. Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work. EN / 69
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