STIEBEL ELTRON 074301, Руководство по эксплуатации и установке, Страница: 24 / 112

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INSTALLATION
Commissioning
11. Commissioning
WARNING Electrocution
Commissioning must only be carried out by a qualified
contractor in accordance with safety regulations.
11.1 Initial start-up
compact contr ol
compact contr ol
26
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2�
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45
2
f
Open and close all connected draw-off valves several times,
until all air has been purged from the pipework and the
appliance.
f
Carry out a tightness check.
f Fit the appliance cover. Check that the appliance cover is
seated correctly.
f
Secure the appliance cover with a screw.
f Insert the cap. Turn it clockwise as far as it will go.
f Latch the output selector into place. To do this, turn it fully
anti-clockwise and clockwise.
f Switch on the power supply.
f Check the appliance function.
f
Remove the protective foil from the control fascia.
Appliance handover
f Explain the functions of the appliance to the user. Show the
user how to operate the appliance.
f
Make users aware of potential dangers, especially the risk of
scalding.
f
Hand over these instructions.
11.2 Recommissioning
!
Material losses
To ensure that the tubular heater heating system is not
damaged following an interruption to the water supply,
the appliance must be recommissioned by taking the fol-
lowing steps.
f
Disconnect the appliance from the power supply by
removing the fuses/tripping the MCBs.
f
Open the tap for one minute until the appliance and
its upstream cold water supply line are free of air.
f
Switch on the power supply again.
12. Shutting down the system
f
Isolate all poles of the appliance from the power supply.
f
Drain the appliance (see chapter "Installation /
Maintenance").
13. Troubleshooting
Fault Cause Remedy
No hot water. The fuse/MCB in the
distribution board has
blown/responded.
Check the fuse/MCB in
your fuse box/distribu-
tion board.
The heating system is
faulty.
Replace the tubular heat-
er heating system.
The appliance does not
start.
The mains water pres-
sure is too low.
Descale / clean the con-
nected aerator / shower
head.
The strainer in the cold
water inlet is blocked.
Clean the strainer in the
water inlet.
The differential pressure
switch (MRC control
valve) with flow meter
does not activate, even
though the DHW valve is
fully open.
The starting flow rate re-
quired for the appliance
to start heating at the
selected output has not
been reached (see chap-
ter "Specification / Data
table").
Clean the strainer in the
water inlet.
The appliance is not sup-
plying hot water; the dif-
ferential pressure switch
has activated audibly.
The high limit safety
cut-out has switched the
appliance off for safety
reasons. The appliance is
not heating.
Check the cold water inlet
temperature and reduce
it if necessary.
The MRC control valve
has a contact fault.
Check the function of the
MRC control valve and
replace it if necessary.
Flush the heating system
and avoid overheating it
while doing so.
The heating system is
scaled up.
Replace the heating
system.