Collector Hose - Bosch EHP 6-11 LW User And Installation Manual

The heat pump and collector hose in general

Collector hose

The task of the collector hose is to convey the heat transfer fl uid through
the ground or lake to fetch a few degrees of heat. The hose consists of a
thin-walled plastic hose of the type PEM 40 x 2.4 PN 6.3.
It is important when the collector hose is placed in the ground that air
pockets are avoided.
Installation and refi lling around the collector hose
Installation and fi lling the soil around the collector hose should follow
applicable material and working descriptions and regulations.
It is important that the fi lling material does not contain stones or other
sharp objects that can damage the collector hose. We also recommend that
the hose is pressure tested before starting to refi ll. If the hose should leak
it is easier to fi x the problem.
When cutting the collector hose it is important that no dirt or gravel enters
the system. Dirt and gravel can cause a blockage in the heat pump.
Minimum permitted bending diameter
Minimum permitted bending diameter is 1 metre. If sharper bends
are required an elbow connector must be used. If the collector hose is
damaged by too sharp a bend, you can repair the damage using a straight
coupling.
Maximum length of the collector hose
The maximum length of the collector hose is based on the heat transfer
fl uid pressure setting. We recommend a heat transfer fl uid consisting
of max 29 per cent ethanol by volume and water. Ethanol has good envi-
ronmental and technical properties even at low temperatures and should
therefore be used instead of other heat transfer fl uids.
Heat pump model
EHP 7 LW/M
EHP 9 LW/M
EHP 11 LW/M
EHP 14 LW
EHP 17 LW
Maximum length of Collector hose with 2 circuits
collector hose with a in parallel: Maximum length
single circuit (m)
PEM 40x2.4 PN 6.3.
500
400
400
-
-
per circuit (m)
PEM 40x2.4 PN 6.3.
1000
800
800
800
800
44
Note
The depth and length of the collector
hose are described in detail in the con-
fi guration program VPW2100.
Note
The maximum collector hose lengths
for heat pump models are provided in
the table.
In situations where the length of the
collector hose needs to exceed the
permitted value, you can connect
the hoses in parallel. As an example
the table shows that for WPS 110 the
maximum hose length is 400 metres.
For two hoses connected in parallel
the maximum length is 800 metres
per hose, i.e. in total 1600 metres with
a parallel connection.