INSTaLLaTION
Safety
20
| WPL 15 IKS | WPL 25 IK
www.stiebel-eltron.com
INSTaLLaTION
7. Safety
Only a qualified contractor should carry out installation, commis-
sioning, maintenance and repair of the appliance.
7.1 General safety instructions
We guarantee trouble-free function and operational reliability
only if the original accessories and spare parts intended for the
appliance are used.
7.2 Instructions, standards and regulations
Note
Observe all applicable national and regional regulations
and instructions.
8. Appliance description
8.1 Mode of operation
The air, which acts as a heat source, enters the external unit.
There, heat is extracted from the outdoor air, so that the air exits
the external unit at a lower temperature.
The energy made usable by the heat pump is transferred to the
heating water inside the internal unit.
The heating water then transfers its energy to the heating circuit.
In addition, the energy of the heating water can also be used to
heat domestic hot water.
The heat from the heating water is transferred to the domestic hot
water by means of a 3-way diverter valve and a heat exchanger.
If the temperature falls below the dual mode point (for example,
-5 °C), the electric emergency/booster heater (DHC) starts up.
This occurs when the heat demand exceeds the heating output of
the heating system. The electric emergency/booster heater then
covers the residual heat demand.
The dual mode point can be adjusted by the contractor in the heat
pump manager, under the menu item START UP.
8.2 Standard delivery
8.2.1 Standard delivery, internal unit
Delivered with the appliance:
- 1 outside temperature sensor AFS 2
- 4 sliding blocks for the appliance feet
- 4 appliance feet
- 2 flexible pressure hoses
- 2 straight push-fit connectors
- Condensate drain hose
- 4 fixing brackets
8.2.2 Standard delivery, external unit
Delivered with the appliance:
- 4 female soldering connections
8.2.3 Required accessories
- Type-tested safety assembly
Never exceed the operating pressure of 1 MPa.
8.2.4 Further accessories
Also available are refrigerant lines, a corded remote control, im-
mersion and contact sensors as well as a wall mounting panel with
ribbon heater for installing the external unit on a wall.
9. Preparations
9.1 Internal unit
Note
The internal unit is designed for internal installation,
except in wet areas.
Do not position the internal unit underneath or next to bedrooms.
Insulate pipe outlets through walls and ceilings against struc-
ture-borne noise transmission.
The room in which the internal unit is to be installed must meet
the following conditions:
- No risk from frost.
- The room must not be subject to a risk of explosions arising
from dust, gases or vapours.
- The room temperature must not exceed 25 °C.
- When installing the internal unit in a boiler room together
with other heating equipment, ensure that the operation of
other heating equipment will not be impaired.
- The volume of the installation room should be at least
13.8 m³.
- Load-bearing floor (for the weight of the internal unit, see
chapter „Specification / Data table“).
- Make provisions for quiet heat pump operation on floating
screeds.
f
f
Isolate the installation surface.
