Kronoterm HM-130 S1, Instructions For Installation, Use And Maintenance Manual

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3.5.2.2 Connecting the buffer tank for DHW
Connect the buffer tank for DHW as shown on the scheme below.
NOTE
For circulation regulation (10), you must install the expansion regulation TT3003 (25).
Picture 11: Connecting the buffer tank for DHW
3.5.2.3 Choosing and setting the expansion vessel of the DHW
system
NOTE
The cold DHW connection must be fitted with an expansion vessel suitable for
drinking water. The selection and installation must be in accordance with the
standard DIN 4807 T5.
CAUTION
Consider the maximal operational pressure of the vessel.
The size and type of the expansion vessel must be determined by the installer / contractor
according to the size of the system. The table below lists some recommendations.
Adjusting the safety valve [MPa (bar)] 0.6 (6.0)
System pressure [MPa (bar)] 0.3 (3.0) 0.35 (3.5) 0.4 (4.0)
Volume of the DHW [l] Expansion vessel [l]*
200
5 8 12
300 15 19 26
Expansion vessel for DHW is factory filled to a precharge pressure p
0
with dry nitrogen.
The pressure must be set depending on the settings of the pressure reducing valve on the
DHW supply to the building.
The pressure in the expansion vessel must be set according to the following formula:
,