Maintenance Instructions; Troubleshooting; Maintenance - SenerTec Dachs MSR2 Instrucciones Para El Montaje, Puesta En Marcha Y Manejo

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8. Maintenance Instructions

8.1 Troubleshooting

Error:
DHW temperature to low
DHW secondary pump does not work
Circulation does not work
Flow rate of DHW to low
Heating water pressure to low
Wild fluctuations of DHW temperature
8.2 Maintenance of Hot Water Module
Only authorised specialists are permitted to perform maintenance.
Depending on the water quality, it may be necessary to descale the plate heat exchanger periodically.
Whilst doing so, observe VDI 2035 and DIN 1988.
In order to descale, the pipe connections on the hot water side (Fig. 9.1) on the plate heat exchanger are
opened, and the descaling device is connected directly to the heat exchanger.
The descaling agents used must be suitable for stainless steel plate heat exchangers. Descaling agents
containing chloride are not permitted. The manufacturer's product documents regarding the descaling agent
must be observed.
After completing the cleaning phase, the descaling liquid must be completely removed from the heat exchan-
ger. Subsequently, rinse with fresh water until it can be assured that the quality of the hot water for human
consumption is not impaired when restarting the system.
New flat gaskets must be used when reconnecting the pipes after rinsing.
Note:
With maintenance of the Dachs and by known problems of the circulating loop the filter seal at the connec-
tion of the circulating loop has to be checked for contamination and if applicable it has to be exchanged.
Check:
- Back valve in circulation pipe does not work
- Amount of water to high
- CHP ready for operation?
- Check pressure of heating water ( >1.2 bar
overpressure)
- Heat exchanger calcified?
- Strainer seal dirty
- Check heating water pressure
- Vent heating water side of heat exchanger?
- Vent circulation circuit?
- Check enabling time!
- Check Strainer seal!
- All shutoff valves open?
- Upstream filter blocked?
- Damaged pressure reducer?
- Heat exchanger calcified?
- Equalizer tank damaged?
- Leakage in heating circuit?
- Pressure of heating water too low?
- Wild fluctuations of water pressure by other
components?
- Circulation does not run?
- Check valve on ball valveon return hose leaky?
Dismantle return hose above and check for water
outlet (return hose above)
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