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The water connection only can be carried out by means of inspected safety membrane valve or a connecting
piece combined with safety membrane valve (not by means of piston slide valve!).The combined assembly of
safety valve consists of a stop valve, clack-valve, punc valve, sewerage valve and safety valve with
evaporated water drainage and it is installed between the line of cold water supply and filling the tank with
cold water in following sequence:
Fig.no.1 Heater connection according to DIN 1988
It is necessary to observe always following recommendations:
The appliance must be installed at the place where it is protected against freeze in order to ensure its proper
function. The safety valve hole must be open and visible, splash head (evaporation funnel) drain must be
directed to the outlet in order to prevent any problems caused by freeze or barriers caused by impurities..
It is forbidden to install a stop valve and any part that inhibits the flow between the safety valve and hot water
tank filling with cold water.
The safety valve must be adjusted to the operation with pressure lower, than the tank nominal pressure.
Before the final tank connection the cold water installation must be rinsed out.
After water connection and filling the tank with deaerated water it is necessary to check the
appliance correct functioning. It is necessary to ensure a free flow of water without water settling in the
evaporated water funnel by lifting or turning (deaerating) the control button of the safety valve
When inspecting the check valve the stop valve must be closed and from the open punc valve no water
should be dripping. The safety valve must be checked in accordance with DIN 1988.
The hot water tank is operated by means of hot water valve installed on the connector of connection
installation. It means the tank is always under pressure of the water installation. The evaporated water is
directed outwards through the safety valve in order to protect the internal boiler against the overpressure
during the heating cycle. In case of pressure drop the check valve prevents the hot water back-flow
penetration into the cold water section and protects the boiler against heating without water.
The stop valve can be used for the tank insulation regarding water-tightness and eliminate water from the
supply section thus unambiguously use the discharge valve in case of need.
3. Circulation connection
As far as possible the circulation connection shouldn’t be used because it is accompanied by high energy
losses. If its use is necessary due to a widely branched system that supplies water then this piping must be
well insulated and the circulation pump must be controlled by means of control clock and thermostat. The
connection temperature must be kept at a low level (45 ºC). The circulation piping has its own external
thread.
4. Threaded heater
Hot water tanks VACUTHERM with indication „…M…“have a sleeve1½” inbuilt in the part number that can
be used for installation of electric heater that ensures the auxiliary or additional heating. The threaded
heaters are only destined for providing the additional heating and they cannot be used for long-term heating.
5. Filling valve
Depending on the system structure, electric built-in heaters or heat exchangers the installation is possible on
the boiler flange Ø 240 mm (inside diameter Ø 178 mm, mean diameter Ø 210 mm, 12 x M12)
and Ø 180 mm (inside diameter Ø 120 mm, mean diameter Ø 150 mm, 8 x 12M).
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Summary of Contents for 200 I
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