Drazice OKCV 180 Manual de funcionamiento e instalación - Página 4
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4.
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, 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 100 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
Temperature (°C)
(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".
Electric circuit closing indicator lamp
Tipping transparent guard
4
Upper temperature range
limit (about 74°C)
"Ideal" temperature
(about 60°C)