DE DIETRICH Thermostat modulant d’ambiance - Manual (Page 76)

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Problem It takes too long for the tap water to get up to temperature.
Solution - Boiler: the DHW standby function may be switched off.
In that case the symbol T is shown in the display.
Control the DHW standby with the DHW standby setting (see the
installation and service manual).
- Boiler: the boiler may be heated up too late.
Set the tap water temperature using the DHW
(see the installation and service manual).
Problem The boiler supplies no hot water or hot water only briefly.
Solution
The DHW standby function T may be switched off.
Switch the DHW standby function to Continuous (see paragraph 6.1).