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ENG
Installation and operating instuctions
ENG
1. General information
This installation instruction applies to the Flexcon P expansion vessel with a content of
18 – 50 litres. The package comprises an expansion vessel (A) with label (B) and an installation
instruction (C). The label indicates the maximum permitted operating pressure and the
pre-pressure.
Flexcon P expansion vessels are pressure devices in accordance with the Pressure Equipment
Directive 97/23/EC. A declaration of conformity can be obtained from the supplier.
Application
Flexcon P expansion vessels are permitted for use only in closed central heating and cooling
systems (with additives based on glycol up to max. 50%) with a maximum feed temperature of
120 °C. The lowest and highest temperatures that may act on the membrane are
–10 °C / 90 °C. The maximum operating pressure is indicated on the rating plate. Please consult
the Flamco documentation for calculating the content and pre-pressure.
Safety
The expansion vessel is supplied pre-pressurised: Damage to the vessel can cause serious injuries.
The bracket should be able to carry the weight of a full expansion vessel. The installation is to be
protected against excessive pressure. A safety valve (e.g. Prescor) should also be installed. The
opening pressure of the safety valve must be the same as or lower than the maximum operating
pressure indicated on the rating plate. Connect the Flexcon P in such a way as to guarantee an
open connection with the boiler in all circumstances.
2. Assembly
The installation must be carried out by approved personnel only. Oberve local regulations.
Installation
Flexcon P expansion vessels are installed on a suspension bracket (D), with the system connector
facing downwards. The vessel must be installed on the intake side of the pump, as close as
possible to the boiler in the system return feed. No water should be able to circulate inside the
expansion vessel.
1.
The connection of the expansion vessel must be sealed with Tefl on tape (E) (no hemp!)
2. Connect the expansion vessel to the heating system.
Commissioning
If the pre-pressure indicated on the rating plate does not agree with the applicable pre-pressure of
the system, the pre-pressure must be adjusted. To do this, the vessel must be removed from the
system and emptied. The valve cap (F) can be removed and the pre-pressure adjusted. Afterwards,
replace the valve cap (F).
In order of commissioning:
1. Flush the system (never do this via the safety valve) and check the installation for leaks while
under pressure.
2. Open bleed points.
3. Bleed the pipe to the expansion vessel.
4.
Fill the system slowly, until the fi ll pressure in the expansion vessel is 0.2 bar higher than the
pre-pressure. Bleed the system while fi lling it.
5. Close the bleed points.
6. Heat the system for half a day to as high a temperature as possible and bleed it regularly.
7. When the water temperature has fallen to 50 °C, top up the system to 0.5 bar over the
pre-pressure of the expansion vessel. You must ensure that the fi lling hose is bled.
3. Maintenance and service
It is recommended that the expansion vessel is checked annually by a qualifi ed engineer.
4. De-installation
1. The system must be depressurised.
2. Remove the valve cap (F).
3. Depress the inner valve (G) to depressurise the expansion vessel.
4. Unscrew the expansion vessel (A).
Warning:
The water in the expansion vessel may be hot!
Warning:
A full expansion vessel is heavy!
Environment:
Observe the local regulations when you dispose of the expansion vessel.
