Supplied By www.heating spares.co Tel. 0161 620 6677
It is an absolute necessity, for combined heaters (HCW+DHW), to exclude bringing "foreign" voltage to the boiler –
i.e., the thermostat contacts must be separated from the heater's internal electrical components.
The DHW reservoir is heated by a separate circuit, controlled by a three-way distributing (not mixing!!!) valve. The valve must be
equipped with an electric switching contact (applicable only to 20, 30, 40, 50 KLO), which is connected if the valve's motor is not
active (gets no voltage).
The boiler's manufacturer supplies both DHW reservoirs (100, 150, 200 l) and suitable three-way distribution valves.
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DHW heating takes preference over the heating circuit – in other words, the heating circuit water is only heated up after the
DHW has reached the required temperature. Hence, if you set the DHW temperature to unusually high values (more than 50-
60°C), the heat-up time is too long and heating of the house/flat may be erratic. The same applies to setting the boiler to a
too low power output or a too low value of the HCW temperature.
The boiler can only be used for the purposes specified in these instructions.
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