Publicité
iNSTAllATiON
maintenance and cleaning
The casing ring overlaps along the joint. A tab on one end clips
into the recess at the other end of the casing ring.
f Ease the casing ring apart, until it can be removed or slid
f
downwards.
Note
Refit the casing ring after completing the work. See chap-
ter "Maintenance and cleaning / Fitting the casing ring").
14.3 Cleaning the evaporator
WARNING Injury
!
The evaporator consists of numerous sharp-edged fins.
Be careful when cleaning the evaporator and wear pro-
tective clothing, especially safety gloves.
To maintain a consistently high appliance output, check the evap-
orator of the appliance regularly for contamination and clean as
necessary.
f Undo the screw that secures the appliance cover at the upper
f
side of the control fascia.
f Remove the control fascia and the appliance cover.
f
f Carefully clean the evaporator fins. Only use water and a soft
f
brush for this. Never use acidic or alkaline cleaning agents.
14.4 Draining cylinder
WARNING Burns
Hot water may escape when draining the DHW cylinder.
To drain the DHW cylinder, e.g. when shutting the appliance down,
proceed as follows.
f Isolate the appliance from the power supply.
f
f Close the shut-off valve in the cold water supply line.
f
The DHW cylinder is drained via the cold water supply line.
f Open the drain valve installed in the cold water supply line
f
(see chapter "Water connection"). If no drain valve has been
installed, undo the cold water supply line at the "cold water
inlet" connection.
f To vent the system, undo the DHW line connected to the
f
"DHW outlet" connection.
Some residual water will remain in the lower section of the DHW
cylinder.
24
| SHP-A 220-300 Plus
14.5 Descaling the electric emergency/booster
heater
Only descale the flange of the electric emergency/booster heater
after removing it, and never treat the interior of the DHW cylin-
der and the impressed current anode with descaling agents. The
electric emergency/booster heater is screwed into the appliance
at a central point at the top.
1
1 Electric emergency/booster heater with protective anode
14.6 Protective anode
The flange of the electric emergency/booster heater 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:
f Remove the controller of the electric emergency/booster
f
heater.
f Check the protective anode and its wiring.
f
f Refit the controller of the electric emergency/booster heater.
f
14.7 Valves
Regularly check the valves in the system (safety valve, pressure
reducing valve, drain valve) to ensure the operational reliability
of the appliance. The amount of limescale deposits depends on
the local water quality.
f Check all valves in the system and remove limescale deposits.
f
f Replace the valves if necessary.
f
f Check the function of the valves.
f
14.8 Condensate drain
f Check whether the condensate drain is clear of obstructions.
f
Remove contaminants.
www.stiebel-eltron.com
Publicité
