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Aquarea air / water heat pump – design handbook 07 / 2014
Project Design
Planning heat source – air
Bi-Bloc system
5.9 Planning heat source – air
5.9.1 Bi-Bloc system
Air to water heat pumps require planning permission in Wales and North-
ern Ireland but may be considered Permitted Development in Scotland
and England, depending on the circumstances. Check with your local
planning office to ensure you comply. Furthermore, besides the condi-
tions listed in the following sections, attention must be paid so that when
several outdoor or monobloc units (e.g. for heat pump cascades) are
used, no short circuit of the exhaust air occurs (see Figure).
The bi-bloc system consists of an outdoor unit and a hydromodule.
Depending on the capacity and model, the outdoor unit has one
or two fans and differs in size (see Overview on Page 3). Generally, the
following points must be observed for the distance between outdoor unit
and hydromodule when using the bi-bloc system:
• In case the length of the refrigerant piping is greater than the pre-filled
pipe length of the unit (depending upon model 10, 15 or 30 m, see
Technical Data), additional refrigerant quantities specified in the
technical data must be added.
• The maximum length of the refrigerant piping between hydromodule
and outdoor device depending on model is 30 or 40 m (see Technical
Data). This value may not be exceeded.
• The minimum length of the refrigerant piping between hydromodule
and outdoor unit is 3 m and the installation may not fall short of this
value.
• The maximum height difference between hydromodule and outdoor
unit depending on model is 20 or 30 m (see Technical Data). This
value may not be exceeded.
• The wall thickness of copper pipes for the refrigerant piping must be
more than 0.8 mm.
1
Minimum distance 100 mm
1
Correct arrangement of several outdoor or monobloc units
wrong wrong correct
