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Collector
Collector hose
The collector hose consists of a thin-walled plastic hose of make Pem 40 x 2.4 DN 6.3. Length and
depth as in IVT:s dimensioning program.
Install the hose rising towards the heat pump to avoid air pockets.
It is vitally important that the filling around the ground coil does not contain stones or other objects
that could damage the coil. The final filling is best carried out after the ground collector has been
pressure tested. Avoid chips or dirt getting into the coil when cutting.
Installation and filling around the collector hose must comply with local regulations.
Bending diameter
Minimum bending diameter permitted is 1 metre. Always use an elbow coupling for sharper bends. If
you damage the hose by bending it too sharply you can repair it with a pipe joint.
Maximal lengths
Specified pressure drop and hose lengths are based on heat transfer fluid containing 29 volume percent
ethanol. Other heat transfer fluids are not recommended because they give high pressure drop at low
temperatures. The table shows the maximum hose length for each heat pump model. The coils can be
parallel connected if the collector’s length exceeds that permitted for a circuit. Note that maximum
hose length per coil is specified for parallel connecting. The table specifies that e.g. a Greenline 11 has
a maximum coil length of 400 metres and for 2 parallel coils the length is 800 metres a coil, a total of
1,600 metres.
Greenline C4
(hose 32 x 2.5) 180 metres 360 metres
Greenline C4 500 metres 1,000 metres
Greenline C5/D5/E5 500 metres 1,100 metres
Greenline C7/D7/E7 400 metres 800 metres
Greenline C9/D9/E9 400 metres 800 metres
Greenline D11/E11 400 metres 800 metres
Max. hose length
with one loop
Heat pump:
Max. hose length per coil
with two loops
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