TECHNICAL AREA Floor
TECHNICAL AREA Floor Drying Function The Floor Drying Function is a special function that allows the installer, through a dedicated heating cycle, to use the boiler for drying a freshly poured radiant floor during a floor system installation. The installer can set parameter 2.7.4 (Floor Drying Cycle) and choose the cycle‘s operation (Functional Heating, Curing Heating, a combination of Functional and Curing Heating, or Manual Heating). This function can follow different flow temperature profiles according to the parameter 2.7.4 values: Value 0 OFF 1 2 3 4 5 Function mode description Curing Heating: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 30 40 30 50 60 Functional Heating: 60 50 50 40 30 40 20 30 10 20 0 10 0 1 2 3 4 5 6 7 8 0 Days 60 0 1 2 3 4 5 6 7 8 Days 7 days 18 days 20 30 Heating function Curing Heating 2 days 10 7 days 18 days OFF 2 days 10 20 0 OFF 0 0 1 2 3 3 4 5 4 5 6 7 6 7 8 9 10 8 9 12 10 11 12 13 15 14 15 17 16 17 19 18 19 21 23 20 21 25 22 23 27 14 16 18 20 22 24 26 24 25 28 10 0 1 2 3 4 5 6 7 8 9 10 11 12 13 Days 15 17 19 21 23 25 27 14 16 18 20 22 24 26 28 50 60 40 30 50 20 40 10 30 0 20 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Days 10 0 60 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Days 50 40 30 60 60 20 50 60 50 10 40 50 40 60 0 30 20 40 Heating function Days Curing Heating 0 Days Days 0 1 2 3 4 5 6 7 8 Flow temperature - parameter 275 - °C Flow temperature - parameter 275 - °C Flow temperature - parameter 275 - °C Flow temperature - parameter 275 - °C Flow temperature - parameter 275 - °C Flow temperature - - parameter 275 275 - °C - °C Flow temperature - parameter 275 - °C Flow temperature - parameter 275 - °C Flow temperature - parameter Flow temperature 275 - °C Flow temperature - parameter 275 - °C Flow temperature - parameter 275 - °C - parameter 275 - °C 60 60 60 50 50 50 40 40 40 30 30 20 20 10 Days Curing Heating 18 days Curing Heating 18 days Days 1 days Heating function 7 days Heating function 7 days OFF 1 days 100 OFF 0 0 1 1 2 3 2 3 4 5 4 5 6 7 6 7 8 9 10 8 9 11 12 10 11 13 14 12 13 15 16 15 17 1817 19 21 23 25 27 14 16 18 20 22 24 26 28 0 1 2 3 4 5 6 7 Days 8 9 10 11 12 13 Days 15 17 19 21 23 25 27 14 16 18 20 22 24 26 28 60 50 40 30 20 10 0 Days The supply setpoint temperature is kept at 77°F for three (3) days, then increased to the target temperature (parameter 2.7.5 - default = 131°F) and kept at this temperature for four (4) days. Supply setpoint temperature increases from 77°F to the target temperature (defined by parameter 2.7.5) by 5F/day, stays at target temperature for “x” days, and decreases from target temperature to 77°F by 5°F/day for a fixed total amount of days to 18. Example 1: Parameter 2.7.5 = 131°F; increasing phase from 77°F to 131°F = 6 days; stays at 131°F for 6 days; decreasing phase from 131°F to 77°F = 6 days. Example 2: Parameter 2.7.5 = 140°F; increasing phase from 77°F to 140°F = 7 days; stays at 140°F for 4 days; decreasing phase from 140°F to 77°F = 7 days. Functional Heating + Curing Heating: The two operation modes are executed consecutively with a stop period of two (2) days in between. Curing Heating + Functional Heating: The two operation modes are executed consecutively with a stop period of one (1) day in between. Manual Heating: The supply setpoint temperature is fixed at the value defined by the parameter 2.7.5 “Floor Drying Flow Setpoint Temperature”. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 / 50 420011270900 - Rev. 04 - 072024
MAINTENANCE Important Maintenance is an essential part of the safe and efficient operation of the boiler and ensures its durability. It should be performed according to the instructions given in current legislation. Perform combustion analysis regularly in order to check the operating efficiency of the boiler and to make sure any polluting substances released are within the boundaries set by current legislation. Before beginning maintenance work: - Disconnect the appliance from the electricity supply by turning the to the “OFF” position; - Close the gas valve and the central heating and domestic hot water system valves. After the work has been completed the initial settings will be restored. After servicing, complete the relevant Service Interval Record section of the Benchmark Checklist located on the inside back pages of this document General comments It is recommended that the following inspections be carried out on the boiler at least once a year: 1. Check the seals in the water part and, if necessary, replace the gaskets and restore the seal to perfect working order. 2. Check the seals in the gas part and, if necessary, replace the gaskets and restore the seal to perfect working order. 3. Visually check the overall condition of the boiler. 4. Visually check and, if necessary, disassemble and clean the burner. 5. Following the inspection detailed in point “3”, disassemble and clean the combustion chamber, if necessary. 6. Following the inspection detailed in point “4”, disassemble and clean the burner, if necessary. 7. Cleaning the primary heat exchanger 8. Make sure the following heating safety devices are operating correctly: - temperature limit safety device. 9. Make sure that the following gas part safety devices are operating correctly: - absence of gas or flame safety device (ionisation). 10. Check the efficiency of the domestic hot water production process (test the flow rate and temperature). 11. Perform a general inspection of the boiler operation. 12. Remove oxide from the detection electrode using an emery cloth. 13. These checks are not exhaustive. Further mechanical, electrical and combustion maintenance checks may be required. WARNING!! THE AUTOMATIC CALIBRATION MUST BE DONE IN CASE OF: - REPLACEMENT OF: FAN, GAS VALVE, AIR/GAS MIXER, BURNER, ELECTRODE. - REPLACEMENT OF P.C.B. - GAS CHANGEOVER - ANY MODIFICATION TO THE FOLLOWING PARAMETERS 220 - SOFT IGNITION 231 - MAX CH ADJUSTABLE 232 - MAX DHW PERCENTAGE 233 - MIN PERCENTAGE 234 - MAX CH PERCENTAGE Operational test After having carried out the maintenance operations, ensure the system is filled and bled fully of any excess air. - Begin operating the boiler. - If necessary, release the air from the heating system again. - Check the settings and make sure all the command, adjustment and monitoring parts are working correctly. - Check the flue system is sealed and operating correctly. Draining procedures The heating system must be drained using the following procedure: - Switch off the boiler, make sure the is in the OFF position and shut off the gas valve; - Loosen the automatic air relief valve; - Open the system drain off cock and collect the escaping water in a container; - Empty the water from the lowest points of the system (where applicable). If the system is to be left inactive in areas where the room temperature may fall below 0°C during winter, we recommend that anti-freeze liquid is added to the water in the heating system in order to avoid the need for repeated draining; when this liquid is used make sure it is compatible with the stainless steel used for the bodywork of the boiler. We recommend the use of anti-freeze products which contain PROPYLENE GLYCOLS as these inhibit corrosion and that they are used in conjunction with the anti-scaling and anti-corrosion function, in the quantities suggested by the manufacturer, at the mimimum temperature. Regularly check the pH level of the water/anti-freeze mix in the boiler circuit and replace it when the value measured is lower than the limit prescribed by the manufacturer. DO NOT MIX DIFFERENT TYPES OF ANTI-FREEZE. The manufacturer will not be held liable for any damage caused by the appliance or the system due to the use of inappropriate anti-freeze substances or additives. Draining the domestic hot water system and indirect cylinder Every time there is a danger of freezing, the domestic hot water system must be drained as follows: - Shut off the water mains inlet valve; - Open all the hot and cold water taps; - Empty the water from the lowest points of the system (where applicable). WARNING Before handling, empty all components which may contain hot water, performing bleeding where necessary. Descale the components in accordance with the instructions provided on the safety data leaflet supplied with the product used, make sure the room is well ventilated, wear protective clothing, avoid mixing different products, and protect the appliance and surrounding objects. Seal all openings used to take a gas pressure reading or to make any gas adjustments. If a smell of burning is detected or smoke is seen leaking from the appliance, or there is a smell of gas, disconnect it from the electricity supply, shut off the gas valve, open the windows and call for technical assistance. Cleaning the primary exchanger Cleaning the combustion side The inside of the primary exchanger is accessed by removing the burner. Wash with water and detergent using a non-metallic rifletype brush, rinse with water. Cleaning the trap The trap is accessed by emptying the condensate bowl located in the bottom section. Wash with water and detergent. Replace the condensate collection bowl in its housing. NB: In the event of prolonged use of the appliance, the trap must be filled before being used again. A lack of water in the trap is dangerous and may cause products to be released into the atmosphere. Installation and servicing instructions / 51
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