Special Accessories; Getting To Know Your Appliance; Operating The Appliance; Customer Service - Bosch ComfortElectronic RDE 1821415 Installation And Operating Instructions Manual

12 | English
Operation with prewarmed water (solar heated)
The continuous-flow heater can only heat prewarmed
water to a max. of 60 °C. If the cold water supply ex-
ceeds a temperature of 55 °C, the water will not be
warmed any further.
Important: The cold water supply temperature must not
be higher than 55 °C!
If the cold water supply exceeds a temperature of 60 °C,
a circuit breaker will trigger and shut the appliance off.
Therefore, the residential plumbing must be equipped
with a thermostatic premixer (e. g. special accessory
BZ 45T20) that will limit the cold water supply tempera-
ture to a max. of 55 °C by appropriately mixing in cold
water.
Operating instructions
Please read and observe the detailed safety instruc-
tions at the start of these instructions!
Important: The appliance may never be exposed to
frost!
Risk of electric shock!
Switch off the mains voltage supply immediately
if a fault occurs.
Immediately shut off the cold water supply to the
appliance should it leak.

Getting to know your appliance

The electronic continuous-flow heater
"ComfortElectronic " is intended exclusively for heating
water which flows through the appliance.
The continuous-flow heater switches on and heats the
water when the warm water tap is opened. It switches
off as soon as the tap is closed.

Operating the appliance

Selecting shower temperature
You can select the desired temperature by turning the
continuously variable rotary knob, which can be adjust-
ed from 30 °C to 60 °C.
9 001 042 048 | (15.6.15)
Dimensions (Figure E)

Special accessories

Pipe kit BZ 45U20: for use of the continuous-flow
heater as an under sink appliance
Priority switch (load shedding relay) BZ 45L21:
for operation with a priority circuit
Mounting kit BZ 45K23: for surface mount installation
Thermostatic premixer BZ 45T20: for installation in
the domestic plumbing when using preheated water
Conserving energy and water
Mixing in of cold water in the fitting requires unneces-
sary water and energy. You should therefore set the de-
sired temperature directly on the continuous-flow heater
and then open the water tap.
In "e" position the appliance is operated economically.
Using the appliance after switching off
the water supply
Switch off the appliance (unscrew the fuse in the
fusebox).
Open the warm water tap and keep it open until the
air has been completely forced out of the water pipe.
Switch the fuse back on again.
The appliance is now ready to operate.
Winter operation
Note: It is possible in winter that the supply tempera-
ture of the water is reduced and the required outlet tem-
perature is no longer achieved.
In order to compensate for this temperature reduction,
please reduce the water quantity on the tap until the
required water temperature is achieved.
Cleaning
Only wipe off the appliance using a moist cloth. Do
not use acidic or abrasive cleaning materials.
Do not use a steam cleaner.
Notes: It is normally not necessary to descale the appli-
ance. However, extremely hard water and the frequent
flows of very hot water can cause the appliance to scale
up. In this case please contact our after-sales service.

Customer Service

We ask you to always provide the E-No. and the FD-No.
of your appliance when calling in a customer service
engineer.
You will find the numbers on the inner side of the fold
up operating panel on the continuous-flow heater.
Robert Bosch Hausgeräte GmbH