6.3
Hydraulic connections
6.3.1
Connecting the heating circuit
Connect the heating circuit at the boiler flow (KV) and the boiler return
(KR) on the top of the EC five. If a heating circuit with mixer and a
charging pump for hot water preparation have to be connected to boiler
flow and boiler return simultaneously, a 3-way mixer should be used as a
mixing device.
Important
Installation of a filter is recommended in the heating return. In the
case of old plants, the whole heating plant should be thoroughly
flushed before installation.
6.3.2
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
expansion 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
outside, the opening must be clear and observable. Any heating
water that may possibly escape should be safely drained off.
6.3.3
Condensate connection
A direct run-off of the condensate into the domestic drainage system is
only 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
condensate hose of the EC five must be inserted through the opening in
the rear or side wall. If there is no run-off facility underneath the
condensate discharge, the use of the Potterton neutralisation and lifting
system is recommended.
Important
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.
6.4
Gas connection
6.4.1
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
upstream of the gas condensing boiler.
If old gas pipes still exist in the region, the installation of a gas filter is
recommended.
Residues in pipes and pipe joints should be removed.
6 Installation
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