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1 PRODUCT TECHNICAL SPECIFICATION
1.1 FUNCTION DESCRIPTION
The heater is designed for accumulation heating of service water using electricity or thermal
energy via an exchanger (for the combined design only). Water is heated by an electric element
(or a heat exchanger) in an enamelled thermally insulated accumulator at the time defined
by the power supplier. The element is at the time of heating controlled by a thermostat
the temperature of which can be adjusted continuously (within the range between 5°C and 74°C).
Once the selected temperature is reached, heating interrupts automatically. Water accumulated
in the tank is then used for the consumption. The tank keeps constant pressure of water
from the water main. The combination faucet hot water valve is opened, water from the water
supply conduit pressed out by cold water pressure flows out of the heater. Hot water flows out
through the top part, and water flowing in remains in the bottom part of the heater.
Pressure principle allows hot water withdrawal at any place from the heater (Figure 9, Figure 10)
1.1.1 OPERATING ACTIVITY
a) Water heating by electric energy
After the heater is connected to electric network, the heating element starts heating water. The element is
turned on and off by a thermostat. After reaching the temperature set, the thermostat switches
off the electric circuit and discontinues water heating. The control light signals if the element is in operation
(light is on) or if it is off (the light goes out). In case of longer operation without using the heated volume,
the thermostat has to be set to position 5°C to 8°C (set the “snowflake” symbol on the thermostat selector)
to avoid its freezing, or electricity supply to the heater has to be switched off. In combined versions,
the stop valve on the inlet to the exchanger has to be closed at the inlet to the heat exchanger
while heating using el. energy, which prevents heating water in the hot water heating system.
b) Service water heating via thermal energy through heat exchanger
Closing valves of the heat exchanger must be opened which ensures heating water flow from the hot water
heating system. Along with a closing valve at the inlet to the heat exchanger, it is recommended to install
an air removal valve, in order to bleed the heat exchanger as needed, in particular before the beginning
of the heating season. The time it takes to heat up using the heat exchanger depends on the temperature
and flow of water in the hot water heating system.
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