Viessmann SM1 Installation And Service Instructions Manual

Note Extended control functions can be used only in relation to the selected system example and the system com- ponents listed there. Additional function for DHW heating With the additional function for DHW heating (boiler circuit control unit function), the solar preheat stage can be heated up at adjustable times. Boiler control unit settings: ■ Set a second set DHW temperature in coding address 58 ("DHW" group). ■ Activate a 4th DHW phase for DHW heating. ■ Set the additional function (in conjunction with the re ...

trol unit. Fault code dis- played System characteristics Cause Measures 90 Control mode Short circuit, temperature sensor / Check sensor / at the solar con- trol module (see page 15). 91 Control mode Short circuit, temperature sensor aÖ Check sensor aÖ at the solar con- trol module (see page 15). 92 No solar DHW heating Short circuit, collector temperature sensor & Check sensor & at the solar con- trol module (see page 15). 94 No solar DHW heating Short circuit, cylinder tem- perature sensor % Check sensor % at the solar con- trol modu ...

Set code 10:1 (target temperature control active). Solar heating will be transferred to the second DHW cylinder when the actual temperature of one DHW cyl- inder has exceeded the value set in coding address 11. Flow rate monitoring Code 0C:1. When, with a running solar circuit pump, the collector temperature is >100 °C for longer than 30 min, and the differential to the cylinder temperature is >50 K, fault message "9E" will be issued. Monitoring of night circulation (not in conjunction with heat pumps) Code 0d:1. Unwanted flow in the solar circuit (e.g. at night ...

parts: ■ Serial no. (see type plate) ■ Position number of the individual part within the assembly (from this parts list) 0341 0342 0343 0344 0311 0350 0346 0345 0349 0348 0330 0347 Fig. 5 0311 Collector temperature sensor NTC 20 kΩ 0330 Solar control module SM1 0341 Power cable fÖ 0342 KM BUS cable 0343 Cylinder temperature sensor NTC 10 kΩ 0344 Solar circuit pump connecting cable 0345 Plug set, 230 V 0346 LV plug set, 2-pole 0347 MCB/fuse 4 A (slow) 0348 Plastic module casing 0349 Strain relief fittings 0350 Installation and service i ...

or runs constantly Temperature sensors inter- changed. Check temperature sensor connection. See the relevant system example. Check setting of coding address 20. Solar circuit pump faulty or in- correctly connected. Check solar circuit pump connection (see page 14). Check setting of coding address 02. Carry out a relay test. Output sS not switched or per- manently switched Incorrect function configured. Check setting of coding address 20. Solar control unit faulty. Check connection of output sS (see page 14). Carry out a relay test. Solar con ...

C Capturing the collector temperature...........................20 Central heating backup.............................................. 21 Coding addresses........................................................ 9 Configuring...................................................................9 Connection and wiring diagram..................................23 Cyclical heating..........................................................22 D Differential temperature control..................................21 E Electrical connecti ...