Uno - Installation Manual

2.12 WATER CIRCUIT

2.12 WATER CIRCUIT DIAGRAM FIG. 2.15 LEGEND: 1 2 3 4 5 6 7 8 9 17 16 15 18 1. Air Pressure Switch 2. Fan 3. Main Heat Exchanger 4. Main Circuit Temperature Probe (Flow Sensor) 5. Burner 6. Detection Electrode 7. Ignition Electrode 8. Pressure Gauge 9. Safety Valve 10. Secondary Heat Exchanger 11. Gas Valve 12. D.H.W. Flow Switch 14. Boiler drain valve 15. Motorised Diverter Valve 16. Automatic By-pass 17. Circulation Pump with Automatic Air Release Valve 18. Expansion Vessel 10 11 12 14 SI017A A. Central Heating Flow B. Domestic Hot Water Outlet C. Inlet Gas D. Domestic Cold Water Inlet E. Central Heating Return 14

3. COMMISSIONING 3.1 INITIAL PREPARATION MTS (GB) Limited support the initiative. Within the information pack you will find a copy of the Log Book. It is important that this is completed in the presence of your customer, they are shown how to use it, and it is signed by them. Please instruct your customer that they must have their Log Book with them whenever they contact a service engineer or us. Preliminary electrical system checks to ensure electrical safety must be carried out by a competent person i.e. polarity, earth continuity, resistance to earth and short circuit. FILLING THE HEATING SYSTEM: Remove the panels of the case and lower the control panel (see section 3.3 for further information). Open the central heating flow and return cocks supplied with the connection kit. Unscrew the cap on the automatic air release valve one full turn and leave open permanently. Close all air release valves on the central heating system. Gradually open valve(s) at the filling point (filling-loop) connection to the central heating system until water is heard to flow, do not open fully. Open each air release tap starting with the lower point and close it only when clear water, free of air, is visible. Purge the air from the pump by unscrewing anticlockwise the pump plug and also manually rotate the pump shaft in the direction indicated by the pump label to ensure the pump is free. Close the pump plug. Continue filling the system until at least 0.7 bar registers on the pressure gauge. Inspect the system for water soundness and remedy any leaks discovered. FILLING OF THE D.H.W. SYSTEM: Close all hot water draw-off taps. Open the cold water inlet cock supplied with the connection kit. Open slowly each draw-off tap and close it only when clear water, free of bubbles, is visible GAS SUPPLY: Inspect the entire installation including the gas meter, test for soundness and purge, all as described in BS 6891:1988. Open the gas cock (supplied with the connection kit) to the appliance and check the gas connector on the appliance for leaks. When the installation and filling are completed turn on the central heating system (section 3.4) and run it until the temperature has reached the boiler operating temperature. The system must then be immediately flushed through. The flushing procedure must be in line with BS 7593:1992 code of practice for treatment of water in domestic hot water central heating systems. During this operation, we highly recommend the use of a central heating flushing detergent (Fernox Superfloc or equivalent), whose function is to dissolve any foreign matter that may be in the system. Substances different from these could create serious problems to the pump or other components. The use of an inhibitor in the system such as Fernox MB-1 or equivalent is strongly recommended to prevent corrosion (sludge) damaging the boiler and system. Failure to carry out this procedure may invalidate the appliance warranty. 15