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DALIS
Digital electric unvented heat pump
8.2. Non-standard installations
One of the unique features of heat pump heating systems is that they create a considerable drop in
air temperature usually expelled outdoors. The expelled air, in addition to being colder than the air in
the environment, is also fully dehumidified. This means that the flow of air can be fed back inside the
building again to cool rooms or spaces during warmer months, such as the summer. A dual air outlet
pipe should be installed, with 2 dampers attached, so that the expelled air flow can be directed either
indoors or outdoors - see figure 6a and 6b.
Figure 6a - installation in summer Figure 6b - installation in winter
8.3. Cold water supply
For safe performance of the product, the tank should be directly fed by an uninterrupted supply pipe
that connects to the pressure reducing valve with a maximum supply pressure of 0.9 MPa - see figure
5. The product should not be used with a supply pressure below 0.15 MPa and a flow rate of less than
20 litres per minute. The following criteria must also be met:
•
Cold water supply must come directly from the cold water mains after the mains stop valve to
the property.
•
The inside diameter of the cold water pipework must be at least 19mm.
•
Pipework should meet the water supply regulations for wholesome water.
Summary of Contents for Dalis 200DHW4
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