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(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, 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. Together with a closing valve, it is recommended to install an air outlet valve at the inlet to the
heat exchanger in order to bleed the heat exchanger (Fig. 2) as needed, in particular before the beginning of the
heating season. The time of heating using the heat exchanger depends on the temperature and flow of water in the
hot water heating system. A combined heater is made in universal design – depending on the need of connecting
the closing valves to the heating element either from the right, or from the left (Fig.2).
5.
SERVICING
Service devices of heaters of 80 to 200 l capacity are located under the transparent guard of the control panel.
Thermostat knob
Temperature setting
Water temperature is set by turning the thermostat knob. The desired symbol is adjusted against the fixed point on
the control panel.
Lower temperature range
limit (about 5°C)
Fixed point on the control
panel
Anti-freezing temperature
(about 8°C)
Notice: Adjusting the thermostat selector at the left backstop does not mean permanent shutoff of the heating
element.
When the heater is in use without blocking the daily rate, we do not recommend the temperature to be set above
60°C.
The maximum value to select is "60".
Limiting the regulation range; locked settings.
For various safety reasons (unintentional scalding, preventing children or unauthorised person from handling), the
regulation range can be limited, or the setting on the thermostat blocked.
Regulation limited
Electric circuit closing indicator lamp Tipping transparent guard
- pull off the thermostat knob (it will be tough at first) and you will find two cylindrical
pins 2,15mm on the back side of the knob
- pull off one pin and insert it to the corresponding hole of the selected maximum
temperature.
- put the knob back on (to the stop)
4
Upper temperature range
limit (about 74°C)
"Ideal" temperature (about
60°C)