commissioning Initial
commissioning Initial Preparation MTS (GB) Limited support the initiative. Within the information pack you will find a copy of the logbook. 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: Lower the control panel and remove the case panels. Open the central heating flow and return cocks supplied with the connection kit (there are two isolation points on the return connection). 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 lowest point and close them only when clear water, free of air, is visible. Purge the air from the pump by unscrewing the pump plug anticlockwise, also manually rotate the pump shaft in the direction indicated by the pump label to ensure the pump is free. Refit the pump plug. Continue filling the system until at least 1.5 bar registers on the pressure gauge. Inspect the system for water soundness and remedy any leaks discovered. Filling of the D.H.W. System (COMBI only): 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 them only when clear water, free of bubbles, is visible. Gas Supply: Inspect the entire installation including the gas meter, test for tightness and purge the supply as described in BS 6891:1988. Open the gas cock (supplied with the connection kit) to the appliance and check the gas connections on the appliance for leaks. Flushing Procedure When the installation and filling are completed, flush the system while cold, refill, turn on the Central Heating system 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. damaging the boiler and system. Failure to carry out this procedure may invalidate the appliance warranty. Initial Start-up The checks to be run before initial start-up are as follows: 1. Make sure that: - the cap on the automatic air valve has been loosened when the system is full; - If the water pressure in the system is below 1.5 bar, bring it up to the appropriate level; - Make sure that the electrical connection has been made properly and that the earth wire is connected to an efficient earthing system; - Switch on the boiler (by pressing the ON/OFF button) and select the standby mode, where no hot water or heating requests are made. - Start the deaeration cycle by pressing ESC for 5 seconds The boiler will start a deaeration cycle lasting about 7 minutes. If you need to stop it press ESC. - Loosen the cap on the head of the pump to eliminate any air pockets; - Repeat the procedure for bleeding the radiators of air; - Open the hot water taps for a brief period; - Check the system pressure and, if it has dropped, open the filling loop again to bring the pressure back up to 1.5 bar. 2. Make sure that all radiator valves are open; 3. Check the minimum and maximum burner pressure values; adjust if necessary using the values indicated in the table on Page 29. Description of Function De-aeration cycle During the filling stage or if there is excess air in the system, the deaeration cycle can be activated by holding the ESC button for 5 seconds. The boiler will start a cycle which lasts approximately 7 minutes. When this is complete the menu screen will be restored. The cycle may either be repeated, if necessary, or stopped by pressing ESC. Press the ESC button until the normal display screen is restored. 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) 28
commissioning Checking the gas settings Remove the front casing and proceed as described below. (a) Supply working pressure check 1. Loosen screw “1” (Fig. a) and attach the pressure gauge connection pipe onto the test nipple. 2. Switch the boiler on at maximum power, enabling the “flue sweep” function (press the button for 5 seconds; the display will show “t --“). The working pressure should correspond to the value established in relation to the type of gas for which the boiler is designed. 3. When the check is over, tighten screw “1” and make sure it is securely in place. 4. The “flue sweep function” is automatically deactivated after 10 minutes or when the button is pressed. Checking the D.H.W. maximum power 1. To check the maximum power level, loosen screw “2” (Fig. b) and connect the pressure gauge connection pipe onto the test nipple. 2. Disconnect the air chamber compensation tube. 3. Run the hot water at maximum power, enabling the “flue sweep” function (press the button for 5 seconds); the display shows “t -- “); press the programming key + to activate operation at the maximum hot water power level. The display will show “t -- “. The supply pressure should correspond to the value shown in the “Gas Settings” table, in relation to the type of gas for which the boiler is designed. If it does not correspond, remove the protective cover on the gas valve and tighten or loosen the adjustment screw “3” (fig. c) to adjust. 4. When the check is over, tighten screw “2” and make sure it is securely in place. 5. Replace the cover protecting the modulator. 6. Reconnect the compensation tube. 7. The “flue sweep function” is automatically deactivated after 10 minutes or when the button is pressed. (b) (c) 1 2 3 Checking the minimum power 1. To check the minimum power level, loosen screw “2” (Fig. b) and insert the pressure gauge connection pipe as above. 2. Disconnect the air chamber compensation tube. 3. Switch the boiler on at maximum power, enabling the “flue sweep” function (press the button for 10 seconds; the display shows “t -- “); press the programming key - to activate operation at the minimum hot water power level. The display will show “t __ “. Disconnect a wire from the modulator (fig. d); the supply pressure should correspond to the value shown in the “Gas Settings” table, in relation to the type of gas for which the boiler is designed. If it does not correspond, tighten or loosen the adjustment screw “4” (fig. d) to adjust. 4. When the check is over, tighten screw “2” and make sure it is securely in place. 5. Reconnect the modulator wire. 6. Reconnect the compensation tube. 7. The “flue sweep function” is automatically deactivated after 10 minutes or when the button is pressed. Check all test nipples for tightness when all checks are complete. (d) 4 29
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