Commissioning; Recommissioning; Shutting Down; Troubleshooting - STIEBEL ELTRON accelera 220 e Operation And Installation Manual

INSTALLATION

Commissioning

12. Commissioning
12.1 Commissioning
Material losses
!
Never connect the appliance to the power supply before
the DHW tank is fi lled.
Note
After an interruption of the power supply, compressor op-
eration remains blocked for at least one minute to allow
the electronic main board to initialize.
If the compressor subsequently fails to start, it may be
disrupted by additional safety devices (Klixon and high
pressure switch). This interruption due to the compressor
motor klixon is terminated automatically.
If the high pressure switch responds, it can be manually
reset after the pressure is less than 246 PSI. This normally
occurs 5 minutes after responding.
12.1.1 Filling the DHW tank
Fill the DHW tank and vent the pipework by following the proce-
dure below:
 Close the drain valve. 
 Open all DHW tap points and the shut-off valve in the cold 
water supply.
 Close the DHW tap points as soon as water starts to emerge 
from them.
12.1.2 Settings / function check
 To check the function, select the maximum set temperature. 
A higher set temperature allows for more mixed water but lower
effi ciency. A lower set temperature is more effi cient but less mixed
water is available. Never reduce the set temperature below 1 22 °F
(50 °C) to reduce problems with legionella.
12.1.3 Appliance handover
 Explain the appliance function to users and familiarize them 
with its operation.
 Make users aware of potential dangers, especially the risk of 
scalding.
 Make users aware of critical environmental factors and re- 
quirements concerning the installation location.
 Inform users that water may drip from the safety valve 
during the heating operation.
 Hand over these operating and installation instructions to 
users for safe-keeping.

12.2 Recommissioning

If the appliance is switched off due to an interruption to the power
supply, no specifi c measures for restarting are required once the
power supply has been restored. The appliance has saved the
parameters most recently set and continues operating with these.
If the comfort heating function was active before interruption of
the power supply, this is reactivated once the power supply has
been established again.
26 | Accelera® 220-300 E

13. Shutting down

Material losses
!
If the appliance is disconnected from the power supply,
it is no longer protected against frost.
 Only disconnect the appliance from the power sup- 
ply for longer periods if you are also draining the
DHW tank.
If there is no usage of hot water for a long period of time, always
drain the DHW tank. See chapter "See 15.4, "Draining the tank",
pg. 28".
The appliance can only be switched off by interrupting the power
supply.
 Pull the plug from the socket or disconnect the circuit breaker 
to the appliance.

14. Troubleshooting

WARNING Risk of electrocution
Prior to all work on the appliance, turn off all power to it.
 For work inside the appliance, remove the appliance cover 
(See 15.1, "Removing the appliance cover", pg. 27).
 If necessary, remove the upper section of the casing jacket 
(See 15.2, "Removing the casing ring", pg. 28).
Note
Refi t the casing ring after completing the work. See 15.9,
"Fitting the casing ring", pg. 29.
Note
Refi t the appliance cover after completing your work. See
15.10, "Fitting the appliance cover", pg. 29.

14.1 Fault table

Fault Cause
The appliance Excessive pressure in
switches off the refrigerant circuit.
unexpectedly The safety pressure lim-
and does not iter has responded. The
switch on compressor has been
again. switched off.
The appliance is operated
outside the operation
limit. The ambient tem-
perature is higher than
the permissible value.
The safety pressure limit-
er has responded.
The compres- The thermal load of the
sor switches off compressor has been ex-
unexpectedly. ceeded. The motor over-
load relay has responded.
Remedy
Eliminate the cause of the in-
crease in pressure in the refriger-
ant circuit.
Wait approx. 5 to 15 minutes for
the appliance to equalize the
pressure. Reset the safety pres-
sure limiter (See 14.2, "Resetting
the safety pressure limiter", pg.
27).
Ensure that the operation limit is
observed.
Wait approx. 5 to 15 minutes for
the appliance to equalize the
pressure. Reset the safety pres-
sure limiter (See 14.2, "Resetting
the safety pressure limiter", pg.
27).
Remedy the cause of the high
thermal load. Wait until the appli-
ance restarts.
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