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5 Installation
All pipes connecting to the tank should have removable connections (fitting/flange). Pipe thread seals with teflon are
to be avoided.
All tank connecting pipes are to be planned, constructed and tested according to the technical rules in force, as well as to the
corresponding norms and regulations in accordance with their application and supply medium.
In highly calcareous water areas, we recommend to foresee a decalcification possibility through stop valves with drain
possibility or t-piece with cold water inlet and hot water outlet of the DHW heat exchanger or a water softening device.
Appropriate filters should be used to prevent dirt or particles from entering the tanks. Moreover, the tank should be ensured
against pressure fluctuations and excess pressure through the installation of tested pressure reducing valves and safety
valves.
Sensors and thermostats necessary for temperature control must be securely and permanently positioned on the tank
(immersion sleeve and sensor rail).
The tank's venting and draining facilities must have the appropriate dimensions and be correctly installed.
The installation company is responsible for the correct execution of work and for the safe and careful insulation of the pipes.
•
When connecting to a solar plant, a temperature limiter is required and must be installed on site at the hot water outlet in
order to prevent scalding.
•
The minimum rate of flow for the charge pump of the hot water supply amounts to 850 l heating water / h.
On the heating water side, the minimum pressure loss in the coaxial corrugated tube amounts to 125 mbar.
•
The necessary heating water pump (to be provided on site) must have the appropriate dimensions.
•
A temperature limiter is required and must be installed on site at the hot water outlet in order to prevent scalding.
•
When installing a circulation pipe, the plug in the flange cover must be replaced by a circulation connection attachment (plastic
immersion pipe with double nipple R ¾", Wikora part number 096 090).
The thread diameter of the heating safety valve depends on the nominal capacity of the water space and the maximum heating
capacity of the heat generator. It can be determined as follows:
Reaction pressure
1,5 bar
2,0 bar
2,5 bar
3,0 bar
Thread diameter (inch)
The size of the DHW safety valve is shown below:
Content of DHW space
up to 200 l
above 200 to 1000 l
© Wikora GmbH
Max. heating capacity of the heat generator
36 kW
72 kW
43 kW
86 kW
50 kW
100 kW
56 kW
112 kW
1/2
¾
Min. valve size
NW 15 (1/2")
NW 20 (3/4")
Page 5
144 kW
252 kW
172 kW
302 kW
200 kW
350 kW
224 kW
395 kW
1
5/4
lllustration 2 (Schematic drawing– example hydraulic system heating)
Max. heating performance
433 kW
650 kW
518 kW
778 kW
600 kW
900 kW
678 kW
1017 kW
6/4
2
75 kW
150 kW
As of November 2013
Errors excepted.
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