Descaling The Electric Booster Element; Protective Anode; Valves; Replacing The Power Cable - STIEBEL ELTRON Accelera 220 E Operation And Installation Manual

INSTALLATION
Maintenance and cleaning

14.5 Descaling the electric booster element

Only descale the fl ange of the electric booster element after re-
moving it, and never treat the interior of the DHW tank and the im-
pressed current anode with descaling agents. The electric booster
element is screwed into the appliance at a central point at the top.
1
1 Electric booster element with protective anode

14.6 Protective anode

The fl ange of the electric booster element is equipped with a
protective anode that protects the appliance from corrosion while
it is connected to the power supply. The protective anode is a
maintenance-free impressed current anode.
If a fault code in the display indicates that the protective anode is
faulty, proceed as follows:
 Remove the controller of the electric booster element. 
 Check the protective anode connector and its wiring. 
 Refi t the controller of the electric booster element. 

14.7 Valves

Regularly check the system's valves (safety valve, pressure reduc-
ing valve, drain valve, vacuum breaker, mixing valve), to ensure the
operational reliability of the appliance. The amount of lime-scale
deposits depends on local water quality.
 Check all valves in the system and remove lime-scale 
deposits.
 Replace the valves if necessary. 
 Check the function of the valves. 

14.8 Replacing the power cable

WARNING Electrocution
If the power cable is faulty, replace it with a new one.
The power cable should only be replaced by a qualifi ed
contractor.
www.stiebel-eltron-usa.com

14.9 Fitting the casing ring

WARNING Electrocution
 Reconnect the ground wire to the casing ring. 
 Fit the upper casing ring. The casing ring overlaps along the 
joint. A tab on one end clips into the recess on the other end
of the casing ring.
 Secure the casing ring with screws. 
 Fit the pipe collar of the condensate drain and the conden- 
sate drain bend.

14.10 Fitting the appliance cover

WARNING Electrocution
 Reconnect the ground wire to the appliance cover. 
 Place the lid back on the appliance top. 
 Connect the ground cable to the signed ground terminal. 
 Connect the cable linking the control with the appliance ECB 
to the back of the panel.
 Insert the control panel. 
 Secure the appliance cover and the control panel using the 
screw at the top of the control panel.
Accelera® 220-300 E | 25