EC POWER XRGI 20G-TO, Manual

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Version 1.0 - 2012 Manual XrGi 20G-To
The storage tank can be set up on concrete without any specific foundations. On uneven ground, a suitable base must be used
to ensure the tank is stable. Set up only in frost-proofed areas unless the heating system is filled with antifreeze. Otherwise the
storage tank must be drained, if there is a risk of frost.
If the storage tank is set up close to a wall, ensure that there is enough space to reach connections of the tank.
EC POWER's 475-l-Storage Tank has a built-in Storage Control, and must therefore only be connected using a Q-Network
Cable; the sensors are already mounted in the right positions in the Storage Tank.
The storage tank makes it possible to separate the generated heat from the electrical power and to prevent the EC POWER
system from cycling (switching constantly on and off). If the demand for electricity is high and also at high tariff times, the sur-
plus heat generated can be accumulated in the storage tank and released to the heating system later on. It is the storage tank
that makes it possible to use the XRGI control strategies (see section 4). The storage tank must be suited to the size of the
building, the type of heating system used and individual circumstances. It should have a capacity of at least 475 l, which usually
makes it possible to run for at least 30 minutes. Larger storage tanks are possible, and may even be advisable, especially if the
heat load fluctuates considerably and there are long periods when little heat is needed (e.g. in schools). Peak heat loads can
be covered by the XRGI, especially in spring and autumn.
How the storage tank is integrated into the system governs its effective capacity available. Installing a storage tank like a
hydraulic header (for connections) causes unstable or fluctuating layers in certain operating modes. This causes the control
system to fail and the storage volume to not be used effectively. For that reason the storage tank in the XRGI system may only
be connected with two hydraulic connections, regardless of the hydraulic system that is selected.
If more than one storage tank is used, they must be connected in series. Experience shows that parallel or Tichelmann circuits
do not work satisfactorily.
Fig. 3.13.
mixing layer