Commissioning; Initial Start-Up; Recommissioning; Shutting Down The System - STIEBEL ELTRON DHF 13 C Bedienung Und Installation

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

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.
24 | DHF C
compact contr ol
compact contr ol
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
No hot water. The fuse/MCB in the
distribution board has
blown/responded.
The heating system is
faulty.
The appliance does not The mains water pres-
start. sure is too low.
The strainer in the cold
water inlet is blocked.
The differential pressure The starting flow rate re-
switch (MRC control quired for the appliance
valve) with flow meter to start heating at the
does not activate, even selected output has not
though the DHW valve is been reached (see chap-
fully open. ter "Specification / Data
table").
The appliance is not sup- The high limit safety
plying hot water; the dif- cut-out has switched the
ferential pressure switch appliance off for safety
has activated audibly. reasons. The appliance is
not heating.
The MRC control valve
has a contact fault.
The heating system is
scaled up.
Remedy
Check the fuse/MCB in
your fuse box/distribu-
tion board.
Replace the tubular heat-
er heating system.
Descale / clean the con-
nected aerator / shower
head.
Clean the strainer in the
water inlet.
Clean the strainer in the
water inlet.
Check the cold water inlet
temperature and reduce
it if necessary.
Check the function of the
MRC control valve and
replace it if necessary.
Flush the heating system
and avoid overheating it
while doing so.
Replace the heating
system.
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