5.Control system - Meibes

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6. Initial operation and system calibration 6.1 Flushing and filling the system ■ The entire system should be flushed before filling. ■ The flat-sealing connections of the freshwater station should be checked for leakage and the connections should be tightened, if necessary. When tightening the connections, always use the appropriate tools to counter-resist! ■ Air which has accumulated in the heating system should be removed by opening the vent screw. Caution: In doing so, pay attention to the system pressure and refill, if necessary. 6.2 Controller calibration Why is it necessary to calibrate the controller? In doing the controller calibration and the subsequent circulation adjustment, the values of the freshwater station is optimised and adapted to the local conditions. In the calibration menu you will be requested to draw hot water three times. In doing so, the operational points are determined for the control system and are independently taken over into the control system. The control system then operates on the characteristic curve so recorded. Under optimal conditions this process takes10 to 15 minutes. The subsequent circulation adjustment connected to this process, serves to log the volumetric flow of the circulation. Note: Please draw off hot water for a longer period before calibration so that stable temperature conditions for cold water and hot water can be set at the freshwater station. 6.3 Calibration procedure 1. Pump capacity 2. Characteristic curve calibration 3. Circulation adjustment 6.3.1 Selecting pump capacity UPS15-60 pump stage I for drawn off amounts up to 15 litres UPS15-60 pump stage II for drawn off amounts up 40 litres Operating at pump stage II is generally recommended for low buffer temperatures. 6.3.2 Characteristic curve calibration A buffer temperature which lies above the domestic hot water temperature is necessary for the characteristic curve calibration. The relevant amounts are found at 2.1 Performance characteristics! Determining the control system operating points 1. Select the “manual” menu 2. Select the “characteristic curve calibration” submenu 3. Select using the right key; „OFF“ flashes; Use upper key to go on “ON”; confirm with right key twice and start a 25 litre hot water tapping according to the menu navigation. After approx. three minutes you will be requested to reduce the hot water discharge volume to 8 litres. After a further approx. three minutes you will again be requested to reduce the hot water discharge volume (4 litres). 4. If thereafter the “characteristic curve calibration on” is displayed again, leave this submenu using the left key. The characteristic curve calibration is now complete and the values are independently logged into the control system. 5. Should it not be possible to draw off a volume of 25l/min, the value for “flow max.” can be reduced to another value e.g. 15l/min. Additionally, a change into the “flow max” is required in the basic setting menu, submenu characteristic curve by using the “UP” or “DOWN” keys, and to select using the right key. The display 25l/min flashes and can be reduced by using the “DOWN” key. Thereafter, confirm this setting by pressing the right key twice. 11
6. Initial operation and system calibration 6.3.3 Circulation adjustment A circulation adjustment is to be undertaken if the freshwater station is fitted with a circulation pump and a circulation pipe is connected to it! For the controller to detect a withdrawal of water, the actual circulation cycle must be known as the flow rate is always measured by the sum of the hot water withdrawal and the overlaying circulation. Information for a software update: As of software version V 1.54 the 3 l/min flow rate restrictor can be left out. A prerequisite for the calibration is that all hot water tapping points are closed. Procedure to be followed: ■ select: manual menu ■ menu item „circulation adjustment“ ■ select by using the right key, „OFF“ flashes ■ using the „UP“ key change to „ON“ ■ confirm twice using the right key ■ the message “flowing” is displayed ■ when the message „Circulation calibration complete“ is displayed, measuring has been finished. The measured value is displayed and independently logged into the control system. ■ Leave the menu using the left key 12
Page 1 and 2: Technical information for installat
Page 3 and 4: 1. Safety instructions ■ The inst
Page 5 and 6: 3. Equipment and functional descrip
Page 7 and 8: 5. Control system 5.1 Display descr
Page 9 and 10: 5. Control system 5.3.1 Explanation
Page 11: 5. Control system If a buffer senso
Page 15 and 16: 7. System examples 7.1 Freshwater s
Page 17 and 18: 7. System examples 7.6 Freshwater s
Page 19 and 20: 9. Trouble-shooting The following i
Page 21 and 22: 11. Diagrams Pressure loss [bar] 20

5.Control system - Meibes

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