MGS - CR Solar controller for standard solar systems with electric afterheating Manual for the specialised craftsman 11207861 *11207861* Mounting Connection Operation Troubleshooting en Thank you for buying this product. Please read this manual carefully to get the best performance from this unit. Please keep this manual carefully.
Safety advice Information about the product Contents Please pay attention to the following safety advice in order to avoid danger and damage to people and property. Proper usage 1 2 2.1 2.2 2.3 2.4 3 3.1 3.2 3.3 3.4 3.5 4 Instructions Attention must be paid to the valid local standards, regulations and directives! The solar controller is designed for use in standard solar thermal systems with electric afterheating (immersion heater) in compliance with the technical data specified in this manual.
1 Overview Solar controller for standard solar systems with electric afterheating Direct connection for electric afterheating System-Monitoring-Display Heat quantity measurement Function control Operating hours counter Intuitive operating concept Slide switch 0 Auto I VBus® interface Energy-saving switch-mode power supply Selection between °C and °F Selection of sensor type (Pt1000 or KTY) en • • • • • • • • • • • Technical data: Inputs: 3 Pt1000 or KTY temperature sensors Outputs: 2 high-current relays
180 180 cover 208 lower fastening slide switch buttons 12.5 en ÎÎ Unscrew the crosshead screw from the cover and remove the cover ÎÎ Mark the upper fastening point on the wall.
Electrical connection 2.3 Note: Connecting the device to the power supply must always be the last step of the installation! Connect the VBus® to the terminals marked “VBus” with either polarity: The controller is equipped with a change-over relay to which a load such as a pump, a valve, etc.
2.4 Terminal allocation Standard solar system with electric after heating with one store, one pump and three sensors. Sensors S1 / S2 are also used for heat quantity measurement. 100 ... 240 V~ en S1 100 ... 240 V~ max. 3 kW max.
3.1 Operation 3.2 Buttons ÎÎ Select the requested channel using buttons 1 and 2 ÎÎ Briefly press button 3, flashes (adjustment mode) ÎÎ Adjust the value by pressing buttons 1 and 2 ÎÎ Briefly press button 3, so that permanently appears; the adjusted value will be saved. The controller is operated via the 3 buttons next to the display.
3.3.3 System screen System screen The system screen shows the system.The screen consists of several system component symbols, which are flashing depending on the current status of the system (see chap. 3.5.1). Sensor Store sensor top 3.4 Slide switch The allocated relay (see p. 13) can be manually switched on (I), switched off (O) or put into automatic mode (AUTO) by means of the slide switch.
Control parameters and display channels 4.
4.2 Display channels Display of collector temperature COL: Collector temperature Display range: -40...+260 °C -40 ...+500 [°F] Shows the current collector temperature. • COL: Collector temperature en Display of store temperature at the bottom TST: Store temperature Display range: -40...+260 °C -40 ...+500 [°F] Shows the current store temperature. • TST: Temperature store base Display of store temperature at the top TSTT: Temperature of the store at the top Display range: -40...+260 °C -40 ...
DT F: Switch-off temperature difference Adjustment range: 0.5 ...49.5 K 1.0 ...89.0 [°Ra] Factory setting: 4.0 K; 8.0 [°Ra] Note: The switch-on temperature difference must be at least 0.5K (1 °Ra) higher than the switch-off temperature difference. If the switch-on difference (DTO) is reached, the pump (R1) is activated. If the temperature difference falls below the adjusted switch-off temperature difference (DT F) the controller switches off the pump.
The collector minimum limitation option prevents the solar pump from being switched on too often at low collector temperatures. When this option is activated, the collector minimum temperature can be adjusted. The collector minimum temperature is the temperature which must be exceeded for the solar pump (R1) to switch on. If the temperature falls below the mini(flashing) is shown.
t1 (2, 3) O: Thermostat switch-on time Adjustment range: 00:00 23:45 Factory setting: 00:00 t1 (2, 3) F Thermostat switch-off time Adjustment range: 00:00 23:45 Factory setting: 00:00 In order to block the thermostat function for a certain period, there are three time frames t1 ... t3. The switch-on and switch-off times can be adjusted in steps of 15 minutes. If the thermostat function should run from 06:00 a.m. and 09:00 a.m. only, adjust t1O to 06:00 a.m. and t1F to 09:00 a.m.
5 Troubleshooting If a malfunction occurs, the tool bar symbols will display an error code (see chap. 3.3.2). en symbols WARNING! Electric shock! Upon opening the housing, live parts are exposed. ÎÎ Always disconnect the controller from power supply before opening the housing! Sensor fault. An error code instead of a temperature is shown on the sensor display channel. Wrong sensor type? 888.8 - 88.8 Cable is broken. Check the cable. Short circuit. Check the cable.
Check the power supply of the controller. Is it disconnected? no yes The fuse of the controller could be blown. The fuse holder (which holds the spare fuse) becomes accessible when the cover is removed. The fuse can then be replaced. Check the supply line and reconnect it. 5.1 Pump starts for a short moment, switches off, switches on again, etc.
The solar circuit pump does not work, although the collector is considerably warmer than the store. Operating control lamp of the controller illuminated? yes no Does the pump start up in manual operation? yes no en Is the pump current enabled by the controller? no yes yes Collector temperature at night is higher than the outdoor temperature. no The adjusted temperature difference for starting the pump is too high; choose a value which makes more sense. Pump is defective replace it.
Accessories 6.1 Sensors Sensors The product range includes high-precision platinum temperature sensors, flatscrew sensors, outdoor temperature sensors, indoor temperature sensors, cylindrical clip-on sensors, also as complete sensors with immersion sleeve. Overvoltage protection device In order to avoid overvoltage damage at collector sensors (e.g. caused by local lightning storms), we recommend installting the overvoltage protection SP10. 6.
Distributed by: MEGASUN MANUFACTURE CO. LTD. 387-388/5B- 5B Block – Tan Bien Ward Bien Hoa City – Dong Nai province - Vietnam. Tel. : 84-613-882488 Fax : 84-613-882434 Web: www.megasun.com.
