Installation; Connect Heating Circuit; Condensate Water Connection; Sealing And Filling Of The Plant - Potterton EC three 125 Installation, Operation And Maintenance Manual

Installation

5. Installation

5.1 Connect heating circuit

5.2 Condensate water
connection
5.3 Sealing and filling of the
plant

5.4 Flue system

34
Note: It is recommended that a filter be fitted in the heating return. In the case of
old plants, the whole heating plant should be thorougly flushed before installa-
tion.
Safety valve
In case of open heating plants, connect the safety header and return pipeline; in
case of closed heating plants install the expansion vessel and safety valve.
Caution! The connecting pipe between the boiler and the safety valve must not be
blockable. The fitting of pumps and fittings or pipe reducer pieces is not permissi-
ble. The blow-off line of the safety valve must be so designed that the pressure
does not increase as one approaches the safety valve. It must not be led into free
space, the opening must be clear and observable. Heating water that may possibly
escape should be safely drained off.
A direct run-off of the condensate into the domestic drainage system is only al-
lowed if the system only comprises of corrosion resistant materials (e.g. PP-pipe,
stoneware or similar materials). If this is not the case, a suitable neutralisation sys-
tem must be installed.
The condensate must be able to flow freely into a tundish. A syphon trap must be
installed between the tundish and drainage system. The condensate hose of the
EuroCondense three must be inserted through the opening in the rear or side wall.
If there is no drain underneath the condensate discharge, the use of a suitable
neutralisation system and pump is necessary.
- Filling the heating plant
- Check tightness (max.water test pressure 6 bar).
The Flue system must provide satisfactory control of condensation, in accordance
with Part J of the Building Regulations:
- Use components that are impervious to condensates and suitably resistant to
corrosion (i.e. stainless steel grade 316 etc.)
- Make provision for draining, avoid ledges, crevices etc (e.g. flexible liners are not
suitable)
- Make provision for disposal of condensate to suitable drain point (e.g. PP pipe or
stainless steel condensate drain with water seal syphon trap. Copper should not
be used)
Owing to low flue gas temperatures only single skinned flue pipe is necessary in
areas where personal protection is required (maximum temperature of 90°C.) The
number of bends used should be kept to a minimum and bends used should be of
the swept type. 90° bends should not be used. If an existing chimney is being re-
used, this must be lined with a correct liner suitable for condensing operation. Ter-
mination of flue must be to current standards both for height and distance from
adjacent objects i.e. other terminals, opening windows or doors and walls.
Flue lengths
Permissible Flue Lengths for Room Air Dependent Operation:
Condensing gas boiler Eurocondense three125-300 kW 7308536-02 06.13