Drazice TO 1 IN, Operating And Installation Manual

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EN
5. OPERATING ACTIVITY
After the heater is connected to electric network, the heating element starts heating water. The element is
turned on and off by a thermostat.
Thermostat can be set as per your need within the range from 5°C to 75°C. We recommend that the knob
was set to position “ e ”. Such connection is most economic; temperature of water is about 35°C (by type TO
10 and TO 15) and 41 °C (by type TO 5). This temperature ensures the optimal operation of the heater.
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 9°C (set the “snowflake” symbol on the thermostat button) to avoid its
freezing.
6. WALL MOUNTING
Prior to mounting check the loading capacity of the wall. If needed, reinforce it. Mount the water heater in
vertical position only. The fastening screws must have guaranteed spacing of 140 mm. Mounting
dimensions are specified on Fig. 1.
7. PLUMBING FIXTURE
Water inflow and outflow is indicated with different colour terminals on the heater tubes. Cold water
supply is indicated with blue and hot water outflow is indicated with red. There are two ways of connecting
the water heater to water network. Closed, pressure connection system allows water withdrawal at
multiple supply (withdrawal) points whilst open flow system allows one supply (withdrawal) point only.
With regard to the selected way of connection, you need to purchase suitable combination faucets. For the
open flow system you need to mount a return valve in order to avoid water outflow from the boiler if water
supply gets discontinued. For this type of connection, you have to use the flow combination faucet. Due to
heating, the volume of water increases, which causes water dripping from the combination faucet pipe.
You will not prevent water from dripping by strong tightening of the combination faucet valve but you may
damage the combination faucet.
For the closed pressure connection system you need to use pressurised combination faucets at the
withdrawal points. You have to attach a safety valve to the filling pipe to avoid increase of pressure in the
tank above the rated pressure. During water heating in the heater, the water pressure in the tank increases
until it reaches the limit set on the safety valve.