4 Planning and installation – Connecting the chimney
38
12.
Insert the flat plug receptacle of the white wire from the cable for
the differential pressure switch (2) into socket 3 (12).
13.
Run the cables from the differential pressure switch (2) and from
the ignition fan (8) through the empty pipe (10) to the central
module.
14.
Using the self-tapping screws, install the side cover (7) on the side
cladding (9).
✓
The HDG automatic ignition is now installed.
4.7 Connecting the chimney
✎
See section “4.3 Connections”, paragraph “Chimney” in this
chapter.
1.
Connect the flue gas pipe to the chimney connection.
2.
Make sure that the connecting piece does not protrude into the
chimney.
3.
Seal the connection to the chimney with highly fireproof silicone
or with a suitable mortar.
✓
The boiler is now connected to the chimney.
4.8 Electrical system
The electrical connections must be made in accordance with DIN IEC
60364 “Setting up low-voltage electrical installations”.
✎
The technical details are described in chapter “3 Mode of
operation”, section “3.3 Technical data”.
✎
The electrical diagram and the hydraulic plan are enclosed with
the documents provided.
4.9 Water
Before putting the system into operation, the pressure of the
diaphragm expansion vessel must be adjusted for the conditions in
the heating system and in the building.
After putting the system into operation, heat up the system to the
maximum boiler temperature and bleed air from the system again to
make sure that there are no air pockets.
Important!
The heating system must be filled with water in accordance with
VDI guideline 2035, “Avoiding damage in hot water heating
systems”.
