Cetetherm Mini Plus CM737, Инструкция по установке, обслуживанию и эксплуатации

Страница: 42 / 52

Cetetherm Mini Plus CM737
Installation, service and operating instruction
40
17
Maintenance and repairs
When carrying out repairs, please contact your local service partner.
Before starting out repairs always close the correct shutoff valves.
When dismounting a component there will be water coming out, hot and under pressure.
17.1 Cleaning the district heating filter
Service actions must be carried out by an authorized service technician.
The temperature and the pressure of the district heating water are very high. Only qualified
technicians can work with the district heating substation. Incorrect operation may cause serious
personal injury and result in damage to the building.
Before starting out repairs close the DH supply and DH return shutoff valves.
After finishing repair; open the shutoff valves. Start with DH supply and then the return line, to
avoid pollutions in the system. Open the valves slowly to avoid pressure surges.
1. Disconnect the power feed to the substation.
2. Close the shut-off valves.
3. Use a wrench and release the filter cover and remove the
cartridge.
4. Clean the filter with water and refit the cartridge. Screw the filter
cover with a momentum of 10-20 Nm.
5. Open the shutoff valves and connect the power feed to the
substation.
17.2 Cleaning the heating circuit filter
Service actions must be carried out by an authorized service technician.
Before starting out repairs, close the shutoff valves DH supply , DH return , heating supply and
heating return .
Release the pressure using the heating circuit safety valve.
After finishing repair, fill up the circuit and vent.
Then open the shutoff valves, start with
DH supply and then the return line, to avoid pollutions in
the system.
Then open
heat return and then supply .
Open the valves slowly to avoid pressure surges.
Picture 23