Potterton eurocondense four 125 kw, Installation, Operation And Maintanance Manual, Page: 43 / 148

6.2 Hydraulic connection
6.2.1 Connecting the heating circuit
6.2.2 Safety valve
In the case of open heating plants, a safety supply and return pipeline
must be connected; in the case of closed heating plants a membrane ex­
pansion tank and safety valve must be fitted.
Caution
The connecting pipe between boiler and safety valve must not be
blockable. The installation of pumps and fittings or pipe reducer
pieces is not permitted. The blow-off line of the safety valve must
be designed in such a way that the pressure does not increase
when the safety valve responds. It must not be routed to the out­
side, the opening must be clear and observable. Any heating wa­
ter that may possibly escape should be safely drained off.
6.2.3 Condensate connection
A direct run-off of the condensate into the domestic drainage system is on­
ly allowed if the system only comprises corrosion resistant materials (e.g.
PP-pipe, stoneware or similar materials). If this is not the case, the
Potterton neutralisation plant must be installed (optional accessory).
The condensate must be able to flow freely into a funnel. A stench trap
must be installed between the funnel and drainage system. The conden­
sate hose of the EC four must be inserted through the opening in the rear
or side wall. If there is no run-off facility underneath the condensate dis­
charge, the use of the Potterton neutralisation and lifting system is recom­
mended.
Note
Danger to life due to flue gas escaping!
Fill the condensate discharge with water before commissioning.
For this, fill water into the flue gas outlet before assembly of the
flue gas pipe until the siphon is completely filled. If this instruction
is not followed, flue gas may escape to the installation room.
6.3 Gas connection
6.3.1 Gas connection
The gas-side connection may only be carried out by an approved installer.
For the gas-side installation and setting, the factory setting data of the
equipment and optional label should be compared with the local supply
conditions.
An approved thermally activated disconnector valve must be installed up­
stream of the gas condensing boiler.
If old gas pipes still exist in the region, the installation of a gas filter is rec­
ommended.
Residues in pipes and pipe joints should be removed.
6 Installation
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