SPECIaL INfOrmaTION
www.stiebel-eltron.com
WPL 15 IKS | WPL 25 IK |
3
SPECIaL INfOrmaTION
- The appliance may be used by children aged 8
and up and persons with reduced physical, sen-
sory or mental capabilities or a lack of experience
and know-how, provided that they are supervised
or they have been instructed on how to use the
appliance safely and have understood the resul-
ting risks. Children must never play with the ap-
pliance. Children must never clean the appliance
or perform user maintenance unless they are
supervised.
- Use a permanent connection to the power supply.
Ensure the appliance can be separated from the
power supply by an isolator that disconnects all
poles with at least 3 mm contact separation.
- Maintain the minimum clearances to ensure trou-
ble-free operation of the appliance and facilitate
maintenance work.
- In dual mode operation, return water from the
second heat generator may flow through the heat
pump. Please note that the return water tempera-
ture may be a maximum of 65 °C.
- The air outlet in the knurled cap of the quick-acti-
on air vent valve must not point towards the MFG
PCB. Close the quick-action air vent valve again
after venting.
- Maintenance work, such as checking the electri-
cal safety, must only be carried out by a qualified
contractor.
- We recommend a regular inspection (to establish
the current condition of the system), and main-
tenance by a qualified contractor if required (to
return the system to its original condition).
- Following isolation from the mains supply, parts
of the appliance may remain live for up to 2 mi-
nutes since the capacitors still have to discharge
into the inverter.
- Never interrupt the power supply, even outside
the heating period. The system’s active frost pro-
tection is not guaranteed if the power supply is
interrupted.
- There is no need to shut the system down in
summer. The heat pump manager has an auto-
matic summer/winter changeover.
- Ensure that the refrigerant circuit is tested once a
year for leaks, in accordance with EC DIRECTIVE
517/2014. The tightness test must be documented
in the log.
DHW cylinders
- Regularly activate the safety valve to prevent
it from becoming blocked e.g. by limescale
deposits.
- Drain the DHW cylinder as described in the chap-
ter „Installation / Maintenance / Draining the
DHW cylinder“.
- Install a type-tested safety valve in the cold water
supply line. For this bear in mind that, depending
on the static pressure, you may also need a pres-
sure reducing valve.
- The safety valve discharge aperture must remain
open to the atmosphere.
- Install the safety valve discharge pipe with a
constant fall to the discharge outlet.
- Size the discharge outlet so that water can drain
off unimpeded when the safety valve is fully
opened.
