32
Version 1.0 - 2012
Manual XrGi 20G-To
The EC POWER Storage Tank with built-in Storage Control ensures that the XRGI system saves engine heat until it is required.
The Storage Tank retains surplus heat for times when heat consumption is high. The XRGI system thus ensures long operating
times, making it more effective.
A storage is essential for the XRGI system to operate properly. The XRGI Storage Tank is of conventional design.
The XRGI Storage Tank holds 475 l of water. The two connections have a nominal diameter of DN 50. Immersion sleeves with
an internal diameter of 6 mm are provided for the four XRGI system Storage Tank sensors. A DN 25 bleed and DN20 drain are
provided for installation and maintenance purposes.
The Storage Tank is connected to the connections provided: in systems with up to three modules, the minimum dimension is
1 ¼“ PT. Guide plates or inflow tubes must be fitted in the storage tank to smooth the flows.
Configuration
The Storage Tank is fully automatic: no further settings are required once it is installed.
Function
The water in the Storage Tank is heated by the heat exchanger in the Q60-Heat Distributor and stored in the Tank from above.
This means that hot water is available at the desired temperature as soon as the Storage Tank starts operating. Surplus hot
water can therefore be held in the Storage Tank at times when electricity consumption or tariffs are high and released into the
heating system later on.
The EC POWER Storage Tank separates the cold return water from the hot flow water using a natural mixing layer. A mixing
layer is a limited mix of hot and cold water. It is essential for the storage capacity that this mixing layer is kept as small as pos-
sible. This is why the EC POWER system ensures that this layer is regenerated every time the storage tank is filled. With the
multi-sensor system it is therefore possible to use the mixing layer to determine very precisely how the Storage Tank is to be
filled. This optimizes the operation of the XRGI system so as to use the storage capacity to the full.
The task for the Storage Tank is to:
ensure reasonable operating times by providing adequate cooling water before the system starts up.
cover peak heating loads by providing sufficient residual heat capacity at the top of the storage tank.
enables power-controlled operation by making optimum use of the thermal and cooling reserves in the Storage Tank. This
means that heat is produced at the times when it is financially most favourable.
The optimum position of the cold and hot reserves varies regularly, following the pattern below:
If the XRGI system is to cover the average heat consumption (typically in spring/autumn), the optimum positions of the
sensors are at the bottom of the storage tank, providing larger cooling reserves.
And conversely: in summer, when heat is usually consumed for 5 -10 hours a day, the optimum positions are at the top of
the Storage Tank, providing larger thermal reserves.
How the Storage Tank is used determines the capacity effectively available. Using a Storage Tank like a hydraulic header (four
connections) can lead to non-stable or fluctuating stratification in certain operating modes. This upsets the controls and means
the storage capacity is not used to the full. This is why Storage Tanks in the XRGI system only have two hydraulic connections,
irrespective of the hydraulics selected, e.g. as shown below:
Note: the storage tank capacity should not be less than 475 l per module.
Содержание XRGI 20G-TO
Страница 1: ...System components Installation INSTRUCTIONS...
Страница 2: ...2 Version 1 0 2012 Manual XRGI 20G TO...
Страница 98: ...98 Version 1 0 2012 Manual XRGI 20G TO...
Страница 131: ...131 Version 1 0 2012 Manual XRGI 20G TO...
Страница 152: ...152 Version 1 0 2012 Manual XRGI 20G TO...
Страница 153: ...153 Version 1 0 2012 Manual XRGI 20G TO...
Страница 154: ...154 Version 1 0 2012 Manual XRGI 20G TO...
Страница 155: ...155 Version 1 0 2012 Manual XRGI 20G TO...
Страница 156: ...156 Version 1 0 2012 Manual XRGI 20G TO...
Страница 157: ...157 Version 1 0 2012 Manual XRGI 20G TO...
Страница 158: ...158 Version 1 0 2012 Manual XRGI 20G TO...
Страница 159: ...159 Version 1 0 2012 Manual XRGI 20G TO...
Страница 160: ...160 Version 1 0 2012 Manual XRGI 20G TO...
Страница 161: ...161 Version 1 0 2012 Manual XRGI 20G TO...
Страница 162: ...162 Version 1 0 2012 Manual XRGI 20G TO...
Страница 166: ...166 Version 1 0 2012 Manual XRGI 20G TO Notes...
Страница 167: ...167 Version 1 0 2012 Manual XRGI 20G TO...
Страница 168: ......