Operation Manual

DD
Heater & hot water
13
102 Adria Motorhomes
13.1.8 Filling the water heater
 Check the rotary switch of the "FrostControl" is set to "Operation" (parallel to the water
connection).
 Close the drain valve by pushing in the snap button.
 Switch on the power for the water pump (main and/or pump switch).
 Open the hot water taps in the kitchen and the bathroom.
– Set the temperature selector or single-lever faucets to "hot".
– Leave faucets open until the air has been forced out of the water heater and water
flows out of the faucets.
13.1.9 Draining the water heater
 Interrupt the power supply for the water pump.
 Open the hot water taps in the kitchen and the bathroom.
 Place a bucket underneath the outlet.
 Turn the rotary switch of the drain valve 90° until it engages (Fig. 72/2).
The water heater is now drained to the outside.
 Check the complete volume has been drained.
Caution!
Damage to heater
 A pressure reduction valve must be used when connecting to a central public water
supply. This prevents pressures above 2.8 bar in the water heater.
Important!
• If the temperature at the drain valve is below approx. 7 °C, you first have to switch on the
heater to heat the installation area and the FrostControl. After a few minutes and when
the temperature is above 7 °C, the drain valve can b e closed.
• If just the cold water system is being operated without using the water heater, it is still
filled with water. To avoid damage by frost, the water must be drained by operating the
safety / drain valve - even when the water heater has not been used.