General
Pipe installation must be carried out in accordance with
applicable regulations. See manual for compatible NIBE
air/water heat pump for installation of the heat pump.
The pipe dimension should not be less than the recom-
mended pipe diameter according to the table below.
However, each system must be dimensioned individually
to achieve the recommended system flows.
MINIMUM SYSTEM FLOWS
The installation must be dimensioned at least to manage
the minimum defrosting flow at 100% pump operation,
see table.
Minimum re-
commended
pipe dimen-
sion (mm)
Minimum re-
commended
pipe dimen-
sion (DN)
Minimum
flow during
defrosting
(100% pump
speed (l/s)
Air/water
heat pump
22200.27F2120-8
22200.27F2120-8
(1x230V)
28250.35F2120-12
28250.35F2120-12
(1x230V)
28250.38F2120-16
35320.38F2120-20
Minimum re-
commended
pipe dimen-
sion (mm)
Minimum re-
commended
pipe dimen-
sion (DN)
Minimum
flow during
defrosting
(100% pump
speed (l/s)
Air/water
heat pump
22200.19F2040-6
22200.19F2040-8
22200.29F2040-12
28250.39F2040-16
Minimum re-
commended
pipe dimen-
sion (mm)
Minimum re-
commended
pipe dimen-
sion (DN)
Minimum
flow during
defrosting
(100% pump
speed (l/s)
Air/water
heat pump
22200.19HBS 05-6/
AMS 10-6
22200.19HBS 05-12/
AMS 10-8
22200.29HBS 05-12/
AMS 10-12
28250.39HBS 05-16/
AMS 10-16
NOTE
An undersized system can result in damage to
the machine and lead to malfunctions.
11Chapter 4 | Pipe connectionsNIBE SMO 20
4 Pipe connections
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