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12
REGULATIONS
The following regulations and requirements must be observed:
• The responsible power supply company's local regulations and
requirements, including any corresponding special rules
• National building regulations
• EN 60335 (Electrical appliances and similar utilities - Safety)
part 1 (General demands)
part 2-40 (Special demands on electrical heat pumps, air
conditioners and air dehumidifiers)
• EN 12828 (Heating systems in buildings - Design and installation of
water-based heating systems)
13
INSTALLATION
Only competent persons may carry out the installation.
The installer must follow applicable rules and regulations
and recommendations from the supplier.
13.1 COLLECTOR HOSE
The task of the collector hose is to convey the heat transfer fluid through
the ground to gain a few degrees of heat. The hose is a thin-walled plastic
hose of type PE80/PE100 quality, diameter 40 mm.
INSTALLATION AND BACKFILLING AROUND THE COLLECTOR HOSE
Installation of the collector and backfilling the soil around the collector
hose should follow applicable material and working descriptions and
regulations. It is important that the filling material does not contain
stones or other sharp objects that can damage the collector hose. Use
hose pliers, not a saw, when cutting the collector hose. Deburr the end
of the pipe internally and externally. It is important that no dirt or debris
enters the system. Dirt and debris can cause a blockage in the heat
pump.
MINIMUM PERMITTED BENDING RADIUS
Minimum permitted bend radius is 1 metre. If sharper bends are
required an elbow connector must be used. If the collector hose is dam-
aged by too sharp a bend, it can be repaired by using a straight coupling.
MAXIMUM LENGTH OF THE COLLECTOR HOSE
The maximum length of the collector hose is based on the heat transfer
fluid pressure drop. A heat transfer fluid consisting of propylene glycol
and water is recommended.
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 parallel.
Heat
Maximum length of collector
pump
hose with a single circuit
model
(m) PE80/PE100 ø40 mm
6kW
600
7kW
500
9kW
400
11kW
400
Table 17
6 720 806 768 (2013/02)
Collector hose with 2 circuits in
parallel: Maximum length per
circuit (m) PE80/PE100 ø40 mm
-
1000
800
800
OUTLINE DRAWINGS FOR THE COLLECTOR HOSE IN THE GROUND
AND THROUGH A WALL
The drawings below show how to run the collector hose in the ground
and through a wall. The soil filling around the hose must not contain
stones.
200 mm
800-1000 mm
Fig. 15 Collector in the ground
[1]
Filling of sand or stone free soil approximately 100 mm around
the collector hose
[2]
Collector PE80/PE100 ø40 mm
Fig. 16 Example of the collector through the wall
[1]
House wall
[2]
Collector hose
[3]
Insulation
INSULATION OF PIPEWORK
All collector pipework should be insulated a minimum of 2 metres from
the property. Pipework should also be insulated where the flow and
return are closer than 800 mm to each other. Use Class O insulation, 19
mm thick.
Non-combustable pipe material must be used when
routing the pipes indoors.
CONNECTING THE COLLECTOR HOSE TO THE HEAT PUMP
It is important that the collector hose has been leak tested before it is
connected to the heat pump. The hose should be tested to 3-4 bar for a
minimum of 1 hour to ensure there are no leaks. The leak test can be per-
formed using an air compressor. The collector is usually pressurised dur-
ing the laying process.
The collector hose can be connected to the heat pump with one or more
circuits. In a multi-circuit system, the collector pipes are connected in
parallel as illustrated below. The parallel pipes are connected to two
manifolds. Each coil must have a shut off valve and a flow control valve.
The flow control valve is adjusted so that the flow rate is the same in each
coil. The coils should have the same length. If the length of the coils are
different, the control valves should be adjested so that each coil gets the
same flow. When adjusting the control valves, use the same difference in
percentage as the difference in the length of the coils.
REGULATIONS
6 720 806 768-01.1I
6 720 806 768-02.1I
21
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