Drazice OKC 200 NTRR / BP Manuel d'utilisation et d'installation - Page 13

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Drazice OKC 200 NTRR / BP Manuel d'utilisation et d'installation
•
The electric wiring scheme is attached to the water heater on the side of the electric
installation guard (see also Figure 5).
•
Connection, repairs, and wiring inspections may only be implemented by a company
authorised to such activity.
•
Expert connection must be confirmed on the warranty certificate.
•
The heater is connected to the 230 V/50 Hz electric network using a fixed moving
conductor with a switch that turns off all network poles and the circuit breaker
(protector).
•
Installations in bathrooms, laundromats, rest rooms, and showers, norm must be
obeyed.
•
The degree of protection of electric parts of the heater is IP 45.
•
Respect the rules of protection against electrical injuries in accordance with norms.
2.5 CONNECTION OF INDIRECT HEATER TO HOT WATER HEATING
SYSTEM
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 thus 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.
Figure 5
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