6 - Installation and Commissioning
Installation shall meet valid rules and may be done by qualied staff only.
Installation of an el. heating rod may be done by qualied staff only.
Defects caused by improper installation, use or handling are not covered by warranty.
After the tank is installed and connected to an existing heating system, it is recommended to clean the entire
heating system using a suitable cleaning agent, e.g. BP 400. Anti-corrosion protective liquid should be also
used, e.g. BP 100 Plus.
6.1 - Connection to heat sources
Place the tank on the oor, as close to your heat source as possible and level it. Connect the heating system
according to one of the schematic diagrams - see Chap. 5. Install a drain valve at the lowest point of the tank.
Install an air vent valve at the highest point of the system. Insulate all the connection piping.
6.2 - Connection to a solar thermal system
The tank can be used with a solar system. In such a case, the inlet for hot heat-carrying liquid coming from
the solar thermal system shall be connected to the G 1” upper sleeve of the heating coil. The lower G 1”
heating coil outlet shall be connected to the return solar piping through which cooled solar uid returns to solar
collectors. Insulate meticulously all the piping between the tank and the solar thermal system.
6.3 - Heating element installation
Electric heating elements shall be installed into G 6/4“ side connections. They can be connected either directly
(elements with integrated thermostat) or via the controller of the entire heating system. Electric heating ele-
ments shall be wired by a professionally qualied person only.
Warning: All electric heating elements shall be protected by a safety thermostat.
6.4 - Connection to water mains
DHW piping shall be done according to valid rules. The connection to the tank, including the ttings, is shown
in the diagram of the recommended connections in Chap. 5. Installation of a pressure reducing valve on the
immersed tank inlet is recommended. For water mains pressure above 6 bar a pressure reducing valve is
necessary. To prevent water loss, we recommend installing an expansion vessel at the cold water inlet to the
immersed tank with a minimum volume of 4% of the total volume of water in the DHW piping, including heat
exchangers, recirculation pipes, etc. (usually 8 l). Installation of an expansion vessel is one of the necessary
conditions for the extended warranty. Should the water be too hard, install a water softener upstream of the
tank. In case the water source contains mechanical impurities, install a lter.
6.5 - Commissioning
During commissioning, the immersed hot water tank shall be lled and pressurized rst, after that the
thermal store can be lled. If the thermal store was lled rst, the DHW tank would get damaged!!!
The tank shall be lled up together with the heating system, respecting valid standards and rules. In order to
minimize corrosion, special additives for heating systems should be used. The quality of heating water de-
pends on the quality of lling water at commissioning, on the top-up water and on the frequency of topping
up. This has a strong inuence on the lifetime of heating systems. Poor quality of heating water may cause
problems like corrosion or incrustation, esp. on heat transfer surfaces.
Quality of DHW shall meet the conditions shown in the Table of limit values for total dissolved solids in hot
water in Chap. 6.4. of this Manual.
Fill the heating system with the appropriate uids and air-bleed the entire system. Check all connections for
leaks and verify the system pressure. Set the heating controller in compliance with the documentation and
manufacturer’s recommendations. Check regularly the proper function of all control and adjustment elements.
Table of limit values for total dissolved solids in hot water.
Description pH Total dissolved
solids (TDS)
Ca Chlorides Mg Na Fe
Max. value 6.5 - 9.5 600 mg/l 40 mg/l 100 mg/l 20 mg/l 200 mg/l 0,2 mg/l
│10
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