Pre-installation requirements
Vent 402 – 6721815546 (2021/03)
6
Fig. 3 3-way valve positions
3.5 Product dimensions and minimum clearances
A free installation space of 800 mm is required in front of the heat pump.
Ventilation connections require a ceiling height of a minimum
2,300 mm. The refrigerant module and the hydraulic module can be
separated to facilitate easier installation in a tight space (see chapter
5.1). At least 25 mm is required between the heat pump and other fixed
installations (walls, washing benches etc.). The ideal location is on the
ground floor next to an outer wall or well-insulated interior wall. The heat
pump should not be positioned against a bedroom wall. If a top cabinet
is to be mounted, it requires at least a 2 mm air channel to the ceiling or
other fixed installation. In the case of a new building, we recommend that
the installation room's walls have double plasterboard on both sides and
are filled with stone wool or possess corresponding sound insulation, i.e.
R'w = 44 dB,and that the ceiling joists are insulated with stone wool to
their full thickness.
Fig. 4 Dimensions and spacing
Dimensions are stated in mm.
[1] Wall
[2] Front
[3] Insulated wall
Fig. 5 Connecting area leakage water container
[1] Holder for leakage water container
[2] Leakage water container
4 Pre-installation requirements
4.1 Water quality for heating water
Heat pumps operate at lower temperatures than many other heating
sources which means that the thermal de-airing is not as effective and
oxygen levels are never as low as with a system incorporating an electric/
oil/ gas boiler. This means that the heating system will be more
susceptible to rust when exposed to aggressive water.
Acid causes corrosion products in the form of magnetite and sediment.
Magnetite has an abrasive effect on the heating system's pumps, valves
and parts with turbulent flow, eg the condenser.
Magnetite filter should be installed to ensure the heat pump function.
Heating systems that require regular refilling or where heating system
water does not provide clear water requires a precaution before
installing the heat pump, e.g heating system supplemented by magnetite
filter and de-airing device.
Do not use any water additives except for a pH-enhancer and keep
the water clean.
Recommended pH values are 7.5 - 9.
Table 2 Heating water quality
Water quality for potable water (DHW)
The integrated domestic hot water cylinder is constructed to heat and
store potable water. Follow country-specific regulations, directives and
standards for drinking water. The water quality in the cylinder has to
comply with the framework of the EU directive 98/83/EC.
The following values must be emphasized:
Table 3 Boundary conditions for potable water
600
2065
10017235-003
Water quality Heating water
Hardness <3 °dH
Oxygen content <1 mg/l
Carbon dioxide, CO
2
<1 mg/l
Chloride ions, CL
-
<250 mg/l
Sulphate, SO
4
<100 mg/l
Conductivity <350 µS/cm
Water quality Unit Value
Conductivity S/cm <= 2500
pH - ≥ 6,5... ≤ 9,5
Chloride ppm <= 250
Sulphate ppm <= 250
2
1
10020635-002
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