5.2.3
Fitting the outdoor sensor
Plugs diameter 4 mm/drill diameter 6 mm
1. Choose a recommended location for the outdoor sensor.
2. Put the 2 plugs in place, delivered with the sensor.
3. Secure the sensor using the screws provided (diameter 4 mm).
4. Connect the cable to the outdoor temperature sensor.
5.3
Flushing the system
Installation must be carried out in accordance with the prevailing
regulations, codes of practice and the recommendations in this manual.
Before a new boiler can be connected to a system, the entire system must
be thoroughly cleaned by flushing it. The flushing will remove residue from
the installation process (weld slag, fixing products etc.) and accumulations
of dirt (silt, mud etc.)
Important
Flush the heating system with a volume of water equivalent to at
least three times the volume of the system.
Flush the domestic hot water pipes with at least 20 times the
volume of the pipes.
5.4
Connecting the heating circuit
For boiler C 640, apply the instructions to each boiler module.
1. Remove the dust caps from the flow and return connections.
2. Connect a safety valve to the flow connection.
3. Fit the system flow pipe to the flow connection.
4. Fit the system return pipe to the return connection.
5.5
Connecting the condensate discharge pipe
For boiler C 640, apply the instructions to each boiler module.
Fig.31
MW-8800N003-6
2
3
4
Fig.32
Connecting the heating circuit
AD-3001428-01
2
4
3
1
1
5 Installation
7762666 - v.02 - 29092020
C 340 / C 640
45
