Drazice OKCE 160 NTR Manual de operação e instalação - Página 12
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2.5 CONNECTION OF HEATER TO HOT WATER HEATING SYSTEM
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.
Figure 7
2.6 FIRST HEATER COMMISSIONING
Before opening the power supply, the tank must be filled with water. The process of first
heating must be executed by licensed professional who has to check it. Both the hot water
outlet pipe and safety armature parts may be hot.
During the heating process the pressurised connection water that increases its volume due
to heating must drip off the safety valve. In non-pressurised connection water drips
off the overflow combination faucet. When heating is finished, the set temperature and
the actual temperature of consumed water should be roughly equal. After connecting
the heater to the water main and electrical power system, and after checking the safety
valve (following the instructions attached to the valve), the heater can be put into operation.
Before fist putting into service or after a longer shutdown the appliance has to be rinsed
out and flushed yet before heating is activated. Before heating starts, the tank must
be completely filled with water and the system properly flushed and vented. First heating
of the tank has to be watched.
________ Hot water
- - - - - - - - Cold water
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