The GeoCollect

Geothermal Energy Absorber Module

Energy-efficient Heating

with

Nature's Inexhaustible Energy

Heating in the winter

Cooling in the summer

THE ABSORBER PRINCIPLE

GeoCollect geothermal energy modules collect valuable energy from the soil. A properly dimensioned

module will guarantee a steady regeneration of the ground within its area of absorption.

GeoCollect geothermal energy modules are an effective and cost-efficient alternative to geothermal

probes. In contrast to conventional surface collectors, this system needs far less land.

Operation - Extraction capacity (see also illustration on the following page):

GeoCollect absorbers achieve their highly efficient extraction rate by their excellent surface design and

a low and a highly turbulent flow (low-flow principle).

Their vertical installation allows the exploitation of a large cubature of ground (approx. 0.5 m

horizontally and 0.4 m vertically)

This setup leads, at a distance of 0.7 m between the individual absorbers, to an extremely small

footprint at a ground extraction capacity of 142.61 W/m².

The calculated basis of 99.83 W per module is in principle applicable for all ground conditions, with the

exception of gravel (not aquiferous).

Due to the discontinuous mode of operation of the heat pump the ground will always have enough time

for recuperation, hence will always provide enough heat (see table on the following page).

Please observe the regulations according to DIN 4124 (10.02)!

THE TECHNOLOGICAL BASICS The determination of the performance values was made upon the average ground conditions in Germany:

Quelle:

Period September / October

Temperature prior to the operation of the heat pump

Temperature after thirty minutes of operation

Temperature after one hour of operation

Temperature after one hour of standstill

Temperature after two hours of standstill

WQA (Output from the heat pump) 12 °C 8 °C 7 °C 10 °C 11 °C

WQE (Input to the heat pump) 12 °C 11 °C 10 °C 10 °C 11 °C

Period January/ February

Temperature prior of operation

Temperature after thirty minutes of operation

Temperature after one hour of operation

Temperature after one hour stand still

Temperature after two hours of standstill

WQA (Output from the heat pump) 3 °C -2 °C -4 °C 2,1 °C 2,6 °C

WQE (Input to the heat pump) 3 °C 1 °C -1 °C 2,1 °C 2,6 °C

Typischer Temperaturverlauf zu Beginn und zur Spitze der Heizperiode

This table demonstrates how the temperature stored in the ground continually leads to energetically

valuable phase transitions at the outsides of the absorber surfaces, in a way that the system almost

entirely regenerates on the level of January/February even after a long winter (e.g. to April) during the

standstill periods of the heat pump.

THE DESIGN OF THE GEOCOLLECT-

ABSORBER Performance Pressure loss

Power P per module

Delta p per module

Delta p per string (10 modules)

99,83 W 96 Pa 960 Pa

Geometry

Surface extraction

capacity (property surface)

Length Width Absorption area

142,61 W/m² (two Absorbers per 1,4 m²)

0,89 m 0,35 m 2 x 0,31 m²

Lenght 990 mm

he

igh

t 3

50

mm

Connection for pipe DN 32 mm outer diameter

DN 32 socket connection

TECHNICAL SPECIFICATIONS

5

Geprüft und überwacht

durch:

Entwicklungspartner der WätaS GmbH:

Material: PP Technische Daten je Modul:

Maße: (L/B/H) 1080x340x40 mm

Material: Polypropylen (PP)

Gewicht: 1648g

Kälteleistung: 83,33 Watt

Max. Strang: 12 Module

Einbringung: senkrecht stehend

Füllmenge: 1,59 Liter

Properties/ Metrics/ Operational parameters Prüfverfahren Wert

Material Polypropylen (PP)

Density ISO 1183 898 kg/m³

Hardness Shore D ISO R868 66

Melt flow index 190° C/ 5 kg ISO R1133 0,5 g/10 min

Melt flow index 230° C/ 2,16 kg ISO R1133 0,3 g/10 min

Tensile Test 50 mm / min ISO R527/II

Yield stress 28 MPa

Tear strength 43 MPa

Elongation at break 800 %

Izod impact-test (notching 01“) ISO 180/4A minus 20 °C 4 kJ/m² minus 20 °C 7 kJ/m² 0 °C 17 kJ/m² 23 °C > 60 kJ/m²

Test pressure 24 h 4 bar

Flexural E-modules ISO R178 1.200 Mpa

Melting point DSC / ISO 3146 150 °C

Bursting pressure 15 bar Vicat softening-temperature at 10 N 147 °C

at 50 N 68 °C

Dimensions of one module (L x H x T) 890 x 350 x 40 mm

Surface of one module 0,31 m²

Weight 1,7 kg

Surface extraction capacity 142,61 W/m² Cooling capacity (depending on ground extraction capacity 99,83 W

Pressure drop per module 96 Pa

Length of a module string 10 modules 5/70 cm DN32 tube /5 10 m

Trench length 5 bis 5,5 m Pressure drop per string with 2x5 m connecting pipe DN 20 and 70 cm DN 32 connection Approx. 2 kPa

Operating pressure of the modules Connected to the brine circuit manifold 0,8 to max. 1,2 bar

Flow rate per string 5 l/min

Filling capacity 2 l

Installation Vertically standing

DIMENSIONING OF THE GEOCOLLECT

GEOTHERMAL ABSORBER SYSTEM

desired heating capacity→ 4 kW 5 kW 6 kW 8 kW 9 kW 10 kW 12 kW 13 kW 14 kW 16 kW 17 kW 18 kW 20 kW

Extraction capacity B0/35°→ 3 kW 4 kW 5 kW 6 kW 7 kW 8 kW 9 kW 10 kW 11 kW 12 kW 13 kW 14 kW 15 kW

Calculated

module volume 99,83 W

module

30

40

50

60

70

80

90

100

110

120

130

140

150

No. of cycles [10 modules per cycle]

3 4 5 6 7 8 9 10 11 12 13 14 15 Calculated

overall module

[m]

30

40

50

60

70

80

90

100

110

120

130

140

150

Length of a single trench

[m]

5 5 5 5 5 5 5 5 5 5 5 5 5

No of trenches 5 m

each

[No.]

3 4 5 6 7 8 9 10 11 12 13 14 15

Required land

[m²]

21

28

35

42

49

56

63

70

77

84

91

98

105

Heat exchanger surface

[m²]

18,6

24,8

31,0

37,2

43,4

49,6

55,8

62,0

68,2

74,4

80,6

86,8

93

String flow rate

[l/min]

5 5 5 5 5 5 5 5 5 5 5 5 5

Overall flow rate [l/h] 900 1.200 1.500 1.800 2.100 2.400 2.700 3.000 3.300 3.600 3.900 4.200 4.500

Absorber filling capacity (w/o)

[litres]

60

80

100

120

140

160

180

200

220

240

260

280

300

Frost protection

content 29%

(ethylene)

[litres]

17,4

23,2

29,0

34,8

40,6

46,4

52,2

58

63,8

69,6

75,4

81,2

87,0

Dimensioning with regard to the heat extraction capacity which needs to be

met, or to the cooling capacity of the relevant brine/water heat pump

respectively.

• Dimension of trench at vertical installation (D x W): 1.5 m x 0.7 m

• Length of trench (housing 10 absorbers, 5 each at flow & return): 5 m

• Ideally supplementary: 0.5 m on the connection side

• The theoretically missing 0.17 W per absorber = 1.7 W per string will be provided by the pipe runs in

the ground, which are not further considered in the dimensioning.

• The performance data is based on a temperature difference in brine-flow/return of 3 K at a string flow

rate of 5 l/min.

GEOCOLLECT GEOTHERMAL ENERGY

ABSOBER SYSTEM - PLANNING AND

INSTALLATION MANUAL

HEAT-SOURCE SYSTEM FOR BRINE/WATER HEAT PUMPS

1 Kreislauf = 10 Module = Entzugsleistung 1 kW

1 Cycle = 10 Modules = 5 m Trench length

= 1 kW Extraction capacity

8

Table of Contents

1. Installation notes 9

1.1 Safety note 9

1.2 Keeping the installation manual 9

1.3 Precautions 9

2. Instructions 9

2.1 Installing the heat-source system 9

2.2 Required installation area 9

2.3 Temperature for installation 9

2.4 Distances for installation 9

3. Installation 10

3.1 Preparing the installation 10

3.2 Installing the heat-source distributor 10

3.3 Placing the GeoCollect absorber modules 11

3.4 Welding instructions for socket fusion jointing with polypropylene PP-R 12

3.5 Necessary pressure tests 13

3.5.1 Preliminary test with 3 bar compressed air 13

3.5.2 Main test with 4 bar water/frost-protection mixture 13

3.6 Filling the trenches 13

3.7 Additional notes for bypassing longer flow and return paths with a DN 32 pipe 14

3.8 Notes on dealing with faults in welding 14

4. Planning guide 14

4.1 Space requirements 14

4.2 Standard installation scheme for 1 kW extraction capacity 15

4.3 Standard installation scheme for longer pipe paths between the absorber field and the brine distributor 16

4.4 Hydraulic description 17

4.5 A proper dimensioning of the heat source 17

5. Commission 18

5.1 Filling the heat source 18

5.2 Notes on insulating and connecting the system to the brine circuit 18

5.3 Adjusting the heat-source distributor 18

6. Declaration of conformity 19

7. Attachment 1 - Tender specifications 20

Attachment 2 - Test report 21

9

1. Installation notes / 2. Instructions

1. Installation notes

1.1 Safety note

These installation instructions are mere tool for

the planning and installation of a heat-source

system.

It cannot be, and is not a replacement for

technical expertise and a professional planning.

1.2 Keeping the installation manual

The installation manual for the GeoCollect

Geothermal Energy Absorber System should be

kept with all other documents relevant to the

system.

1.3 Precautions

In order to ensure a flawless functionality of the

system as well as for warranty reasons it is

absolutely necessary to follow the steps in this

guide and to use the components specified by

GeoCollect GmbH.

2. 2. Instructions

2.1 Installing the heat-source system

The installation of the GeoCollect Geothermal

Absorber System must be carried out by

specialists. The proper commissioning of the

heat-source system for heating purposes is

warranted by the installer of the system.

The performance data (B0/W35) have been

determined for the climate area in Germany, at

440 meter above sea level, at a number of

2,000 hours per year in full operation (Heating

1,800 hours, Service water 200 hours), at 100 %

QN heating load for a standard building.

Important:

If the heat pump is laid out for less then

100% (<100%) of the required standard

heating load QN, the number of modules

must be recalculated due to their higher

operating hours.

2.2 Required installation area

The required installation area for GeoCollect

geothermal systems must be determined at the

planning stage by the installer of the system.

You will find a planning guide in section 4.

2.3 Temperature for installation

GeoCollect geothermal absorbers may only be

installed or mechanically loaded at both an

ambient temperature and a material temperature

of at least +5 °C. There is an increased risk of

breakage at temperatures below 5+ °C. The

ideal installation temperature is >+10 °C; the

handling of the absorbers requires a higher

carefulness at temperatures below +10 °C.

2.4 Distances for installation

I minimum distance of 0.30 m (upwards and side

wards) must be kept to supply lines of all kinds

when placing the GeoCollect geothermal

absorber modules in the ground. The modules

must not be covered with a pavement, sealed up

or overbuilt. Plantings are possible in principle,

however the roots must not grow deeper than 80

cm (please consult a gardening company if

necessary). The distance to the property line

should be at least 0.30 m, if possible 0.40 m -

local regulations may require a bigger distance.

UV light may have an adverse impact on the

material properties of GeoCollect geothermal

absorber modules, therefore they must be

protected from constant direct sunlight.

Important:

This product may not be used by children or

persons with reduced physical or mental

capabilities or insufficient experiences or

knowledge, unless they are under the

supervision or guidance of a person

responsible.

Subject to technical changes!

10

3. Installation

The installation must be performed in the

following order:

1. Determination of the required space

2. Excavation work

3. Placing of the modules and their connections

in rows of 5 modules; 2 rows must be

interconnected via DN 32 PP-pipe and fusion

sockets

4. Installation of the heat-source distributor

5. Welding the DN 20 flows and returns on the

module strings

6. Connecting the flows and returns to the

distributor

7. Pressure tests with protocol

8. Fixating and sluicing of the modules in the

trench with soil/sand

9. Backfill of the pit with stone-free excavated

material

3. Installation

Important:

The length of the DN 20 single connection tubes

from the distributor to the GeoCollect absorber rows

should not be exceed 10 m. Furthermore, DN 32

tubes must be used at lengths up to 150 m. The

pump performance must be adjusted accordingly

where necessary.

3.1 Preparing the installation

The GeoCollect absorber modules must be placed in

a depth of 1.50 m. The ground must be smooth and

free from sharp objects such as stones. The ground

must be covered before the modules can be placed.

Important:

The thermal transfer medium is a mixture of

ethylene and glycol with 29 % per volume and a

flocculation point of -15 °C. Components such as

the heat source distributor or flow and return

tubes must be installed in a way that they are

protected from frost, UV radiation and external

impacts (mechanical damage, animals, etc.).

Please observe your local weather conditions

(frost protection). It is not admissible to use any

other thermal transfer medium apart from the

medium recommended by the GeoCollect GmbH

(if necessary, please contact the GeoCollect

GmbH).

3.2 Installing the heat-source distributor

For hydraulic reasons, the heat-source distributor

cannot be placed farther away then 20 m from the

house and should be paced, for an easy venting,

at the highest point. If this distance cannot be met

due to practical reasons, the distributor must be

placed in close vicinity to the GeoCollect

geothermal absorbers, e.g. in an accessible well

casing. The connecting link from the heat pump to

the distributor must in this case be one size larger

than the connection with the appliance.

Illustration: Heat-source distributor in the pit, prior

to connection and insulating (first picture) and

after insulating on the wall (second picture)

If you wish to install the heat-source distributor at

the groundwork, a basement wall or inside of a

light shaft, you need to insulate it for example with

a rigid foam board placed between the wall and

the distributor toward the wall/groundwork.

11

3. Installation

3.3 Placing the GeoCollect absorber modules

Please make sure that there are always caps

attached to the open ends of the pipes when

placing them in the ground; this will prevent the

ingress of soil into the pipe system.

For the welding process, please observe the

attached "Welding instructions for socket fusion

jointing with polypropylene PP" (see section 3.4).

The pipes should be rolled out to the required

length and cut with cutting pliers (do not use a

saw); the cutting edges must be furnished with

sealing plugs immediately.

10 GeoCollect absorber modules make one string

each. In this process, 5 absorbers are being

welded together with the fusiotherm welding

process by use of the already affixed fusion

sockets on the absorber.

Both strings of 5 absorbers each will then be

interconnected at the socket less ends via 90°

fusion sockets and one 70 cm PP tube (DN 32).

DN 32 to DN 20 reduction sleeves must be

welded to the ends of each row of 5 absorbers

that facing the brine distributors, namely into the

sleeves/sockets attached to the absorber.

Subsequently, PP-tubes (DN 20) in a sufficient

length leading towards the brine distributor will be

welded to these reduction sleeves,

The flow and return pipes of the absorber rows

which lead to the brine distributors should be

placed on the ground with only a small distance in

between (do not bundle them!)

Welded connection of two absorbers

Illustration below: plug-connection as an installation aid

90° welded connection - the fusion sockets are at the socket-free

end of the absorber and are connected with a 70 cm DN 32 PP-

tube

Illustration on the left:

Welded connection from the absorber (on the socket

side) with DN 32 to DN 20 reduction sleeve and a

welded-on DN 20 tube (for connecting the bribe

distributor)

Important! It is absolutely necessary to install the expansion

vessel (diaphragm expansion tank, sole-proof)

provided by the customer!

Please observe the regulations according to DIN

4124 (10.02)!

12

3. Installation

3.4 Welding instructions for socket fusion

jointing with polypropylene PP

• Assemble the welding set and bring it up to

operating temperature (~ 240 °C). The welding

tools must be free of dirt and intact.

• It is recommended to use a pipe cutter to make

strait cut at the end of the pipe. The end must then

be cleaned from dust and dirt, and the depth of

insertion should be marked with a pen/marker

(see Table 3.4.1).

• Clean the fitting from dust and dirt.

• Push the fitting on the welding insert and warm it

up.

• Do not remove the fitting from the welding insert.

• Push the pipe on the welding insert until the

marked position is reached and warm it up. The

required warm-up time depends on the diameter

(see Table 3.4.1).

• Pull the fitting and the pipe simultaneously from

the welding inserts.

• Quickly, without twisting it, telescope the fitting

and the pipe, and hold it that way for several

seconds (see Table 3.4.1). Make sure not to push

the pipe too far into the socket (use markings with

a depth stopper).

• The necessary cooling-down time must be kept

(see Table 3.4.1).

Table 3.4.1

Reference values for heating-element socket welding of PP-pipes at an outdoor temperature of 20 °C and

moderate air movement.

Important!

The welded connection do not reach strength before circa 30 minutes!

The welding insert must, upon placing the reduction sleeves, be changed from DN 32 to DN20 after the

module rows have been welded.

Caution! Risk of burns! Disconnect the welding set from the mains and let it cool down first!

Diameter

outer pipe Welding

penetration

depth

Fitting

warm-up

time

Pipe warm-

up time

Max. Processing

time

Holding

time

Cooling

down

time

20 mm 10 mm 4-5 s 3-5 s 3-5 s 10 s 4 min.

32 mm 10 mm 8-10 s 8-9 s 3-5 s 10 s 4 min.

13

3. Installation

3.5 Necessary pressure tests

3.5.1 Preliminary test with 3 bar compressed

air

A preliminary test of the entire installation with a

pressure of 3 bar must be performed prior to the

filling of the trenches.

The installation must be checked for leakages. It

is necessary to create a properly filled in protocol

on the successfully performed preliminary

compressed air test (see attachment 1).

3.5.2 Main test with 4 bar water-glycol

mixture (safe at temperatures up to -15 °C)

Upon a successfully performed preliminary test

the system must be filled with a water-glycol

mixture and put under a test pressure of 4 bar.

This test state must be maintained during a

course of at least 12 hours and needs to be

logged in detail (see attachment 3).

After the test has been successfully finished,

other trades and maintenance groups may start

their own work. The heat-source system,

however, must be

kept under the above mentioned test pressure,

so that any leakage caused by other trades can

be discovered and repaired immediately.

In the event that other trades or maintenance

groups will not start their work immediately

following the pressure test, the installation must

be discharged for the time being, that is the

pressure within the system must be reduced to

the intended operating pressure. As soon as the

follow-on works about to be started, increase the

pressure to 4 bar again.

All test protocols must be sent duly completed to

the GeoCollect GmbH.

Important:

Sending the test protocols within a

reasonable period of time (2 weeks) after the

pressure test, and the application of the

system components recommended by the

GeoCollect GmbH is a requirement for the

extended 10-year warranty (excluding the

absorber modules) of the product liability

insurance.

Important:

Do not use the GeoCollect geothermal

absorber system as a dry heater for screed

or the building, especially not if the heating

period is about to begin soon: the

recuperation time of the system accounts for

a whole summer. Dry heating must be done

with a different heater (e.g. heating

cartridges). If you wish to use the brine/water

heat pump for the heating of pools too, you

must expect an increased number of annual

hours of full use, and need to extend the heat

source.

3.6 Filling the trenches

The modules must be fixated with a thin layer of

soil (or sand, according to DIN 4022 rough sand

or sand with grains of 0.63-2.00 mm in diameter)

sluiced before the complete filling of the pit.

Construction equipment (such as excavators)

must not drive over the installation area before

the trenches have been completely filled and

well compressed (proctor density of more than

90 %), this may lead to a damaging of the

modules.

14

3. Installation

4.1 Space requirements

The space requirements for the module rows

should be determined in the planning phase

using the site plan. One module cycle (= 10

modules) requires a trench length of 5 m. The

modules are placed with a lateral distance of

circa 0.7m or more.

Important:

The placement of solid structures such as

terraces, garages, buildings above the

GeoCollect absorber modules is not

possible!

Exeptions can only be made if there is enough

water (e.g. rainwater) distributed underneath the

sealed surface and above the geothermal

absorber modules. The design/construction,

however, is to be made by specialist.

The placement of the modules must match the

conditions on your property. The position of the

module cycles should be marked in site plan for

any excavation works that might happen in the

future. The maximum slope for a placement of

the modules in a hillside location is 15 % (please

consider the minimum covering of the modules

and the air vent).

4. Planning guide

3.7 Additional notes for bypassing longer

flow and return paths with a DN 32 pipe

In order to avoid high pressure drops at lengths

of > 10 m between the absorber rows and the

brine distributors, we recommend using a DN 20

to DN 32 reduction sleeve 5 metres or more

behind the brine distributor, and to weld the DN

32 pipe directly with the socket side of the

absorber.

3.8 Notes on dealing with faults in welding

The absorbers are designed in a way that allows a

cutting of faulty welded joints directly next to the

weld and on both sides. The modules can then be

welded again by using a DN 32 PP fusion socket.

The relevant absorber modules must be changed

only if this second attempt has failed too.

Connection of a DN 32 return tube towards the absorber's socket side

Anbindung DN 32 Rohr zur Überbrückung des Abstandes > 10 m zum Soleverteiler

DN 32 to DN 20 reduction directly before the brine distributors

15

4. Planning guide

4.2. Standard installation scheme for 1 kW extraction capacity

Flo

w f

rom

hea

t p

um

p t

o t

he

abso

rber

s

Ret

urn

to

hea

t p

um

p

Rows with 5 absorbers each

Welded connections between t he absorbers

Interconnection between the rows of modules with a DN 32 PP pipe

90° DN 32 fusion sockets

Reduction sleeves 32 to 20 mm

20 mm PP tube connecting the brine distributor

Brine distributor with flow limiter

Brine distributor with ball valves

Return to heatpump

Flow from heatpump

16

4. Planning guide

4.3. Installation scheme for strings with bigger distances to the brine distributor

Vo

rlau

f vo

n d

er W

ärm

ep

um

pe

in d

ie A

bso

rber

Rü

ckla

uf

zur

Wär

me

pu

mp

e

Rows of 10 absorbers each

Welded connection between the absorbers

90° fusion sockets for DN 32

32 mm to 20 mm reduction sleeves

32 mm PP pipe for bypassing longer distances (up to 150 m)

20 mm PP pipe connecting the brine distributor

DN 32 fusion sockets

17

4. 4. Planning guide

4.2 Hydraulic description

The connection of the heat pump to the flow and

return distributor for brine/water heat pump

systems with a ventilation module and absorber

modules, heat-source distributor, charging and

discharging armature and diaphragm pressure

expansion vessel must be made as follows:

The outlet side of the appliance must be

connected with the flow distributor.

The inlet side must be connected to the return

distributor (distributor with flow limiters). The

individual flows of the modules must be aligned;

the highest possible flow should be achieved

(see Setting Table 5.3.1)

The distances of 0.35 or 0.70 respectively

should always be considered in the planning

stage

4.3 A proper dimensioning of the heat source

The dimensioning depends on the calculated

heating load for the building according to DIN EN

12831 which compromises the requirements for

transmission heat and ventilation heat. Should

the indicated capacity of the heat pump mach

the calculated heating load for the building, there

is a heat-pump-to-heating-load coverage of 100

%.

Should the indicated capacity of the heat pump

be lower than the heating load for the building,

there is an undersized heat-pump-to-calculated-

heat-load ratio; this, however, is a well-

established approach for a proper dimensioning

of a heat pump.

If the heat pump is undersized, you have to take account of

an increased number in its operating hours, and thus of a

longer run time over the year, which will result in a higher

load (heat extraction) of the heat pump.

This again means, that the heat source (its size, in the event

of an undersized heat pump) must be laid out for a heat pump

that covers 100 % of the building's heating load; otherwise

the heat source would be overcharged and might not be able

to recover.

Important:

Performance data (B0/W35) calculated for: German climate

area, 440 m over sea level, 2,000 hours per year in full

operation (Heating 1,800 hours, Service water 200 hours), at

100 % QN standard heating load.

Sample calculation:

Standard heating load (calculated according to DIN): 7.84

kW Heating capacity (heat pump) at B0/W35: 6.43 kW

Calculation:

Q coverage = Q heating capacity x 100 %

Q standard heating load

= 6.43 kW x 100 %

7,84 kW

= 82%

18

5. Commission

5. Commission

5.1 Filling the heat source

The GeoCollect absorber installation must be

rinsed and air vented right after its pressure test

(see 3.5). Prior to this, the pressure in the

expansion vessel on the side of the brine must

be checked and adjusted to 0.5 to 0.7 bar. The

operating pressure should be 1.0 to 1.2 bar.

For flushing you should by all means use a

flushing/rinsing system, which can be connected

to the charging and discharging armature

installed on the heat-source inlet side. Close the

suthoff valve on this armature prior to the

flushing, so that no brine flow can occur. Then

open the shutoff valves at the rinsing system and

activate its circulation pump, which will then

circulate the brine fluid from its own vessel

through the heat pump and the absorber

modules.

The brine cycle is full as soon as brine liquid

begins to flow back into the vessel coming from

the upper inlet connection. Now the brine pump

in the heat pump can be activated. Close all but

one connections at the brine distribution

manifold in order to rinse all module cycles dirt-

and bubble-free. This way it will be ensured that

also this string is rinsed thoroughly and all

possible bubbles or particles are sluiced out. The

rinsing for each string is sufficient when there

are no bubbles or no formations of foam visible

at the returning brine.

Now open the next string, and close the one that

was previously rinsed. Continue in this order until

all strings have been rinsed in turn.

5.2 Notes on insulating and connecting the

system to the brine circuit

The connecting curves in the heat pump must be

checked for proper insulation; non-insulated parts

must be insulated. Choosing the right insulating

material and a proper workmanship is very

important. A thickness of the chosen insulating

material,

which must be diffusion-proof, of at least 19 mm is

compulsory (plus UV-resistance at outdoor

installations).

5.3 Adjusting the heat-source distributor

A proper functionality of the heat-source system

requires a hydraulic compensation at the heat-

source distributor - this will hydraulically align all

modules.

All regulating valves at the distributor manifold must

be fully open. All flow limiters at the distributor

manifold must be set to the highest possible flow

rate by using the regulating valve, and must be

hydraulically aligned. This will ensure an even and

ideal mass flow per module cycle, and the brine

flow will be achieved at the lowest possible

pressure loss.

Table GeoCollect 5.3.1 (see also 4.2)

6. Declaration of conformity

GeoCollect GmbH - Geothermal Engergy Absorber System

Declaration of Conformity

We hereby declare the safeness of our products, which correspond to the state-of-the-art and comply with common

regulations. Their operation in accordance with the intended use does not pose a risk to the user.

Certificate of Compliance

GeoCollect Geothermal Absorber System

We hereby certify, that the used polypropylene (PP) is physiologically and toxicologically safe. The German Federal

Board of Health (Bundesgesundheitsamt, BGA) regulates in its Recommendation No. 7 "Polypropylene" its use in the

manufacture of commodities as referred to in Paragraph 5.1 No. 1 of the German Foodstuffs and Commodities Act

(Lebensmittel- und Bedarfsständegesetz, LMBG). Accordingly, polypropylene complies with the regulation of the

German BGA, memorandum 152, page 25 of 1 April 1982 as well as with the valid KTW guidelines (KTW Guideline =

Guideline for the Hygienic Assessment of Organic Materials in Contact with Drinking water); plastics, containers and

fasteners may without any concern be made from polypropylene. Furthermore, polypropylene may be used for the

manufacture of pharmaceutical containers.

The KTW-Recommendations for health assessment of plastics and other non-metallic materials apply to drinking water

supply systems. Polypropylene complies with these regulations. Polypropylene is neutral to ground water and is not

broken down by microorganisms.

The chemical composition of the polypropylene in use complies with national and international regulations for the use

of materials that come into contact with potable water.

The polypropylene used by GeoCollect GmbH has been tested by the German Versuchsanstalt für Kunststofftechnik

und Großchemie (Reseach Institute for Plastics Technology and the Chemical Industry).

During this examination it was found that there is a compliance with the following guidelines:

• the List of monomeres No. 260/92 of the German Department of Trade and Industry

• the List of monomeres of the European Union, directive No. 90/128/EEC and 92/93 EEC and 93/9 EEC

• the BGA whitelist (of the German Federal Board of Health) for polypropylene

• the KTW-whitelist (Germany) for polypropylene that is in contact with water

The polypropylene used by us meets the requirements for products that are in contact with foodstuffs in the following

countries:

Belgium, Germany, Great Britain, Italy, The Netherlands, Spain and the European Community.

Marienberg, March 2014

18

GeoCollect® GmbH • Max-Brauer-Allee 218 • 22769 Hamburg • • Tel +49 (0)40/2263306 13 • Fax +49 (0)40 / 2 263606 66 •

• Mail: export@geocollect.de• www.geocollect.de • • Geschäftsführer: Wolfgang Seifert • Handelsregister: Amtsgericht Hamburg • HRB 132417

Bank: DKB IBAN: DE93 1203 0000 1020 1091 44 BIC: BYLADEM1001• USt.-ID: DE 815 332 719

Attachment 1: Tender specifications for a GeoCollect Geothermal Absorber

System

Tender specification: Geothermal Absorber System BOQ: Sanitation and heating technology Trade: Heat supply engineering Titel: Ground collector Type: GeoCollect-Geothermal Absorber Modules Item No.: EWAM02PP32 Description of the appliance: Rows of modules of ground collectors for the exploitation of near-surface geothermal energy by means of an absorber system. The modules are made from soil-resistant plastics (polypropylene). Vertically standing modules are installed, each with a maximum number of 10 modules per cycle, including shaped pieces and a DN 32 pipe. The modules will be interconnected with a polyfusion welding. The modules will be installed in trenches with a width of about 70 cm and a depth of about 1.50 m. The distance between the brine distributor and the absorber field must not exceed 20 m. The WätaS Wärmepumpen Sachsen GmbH Planning and Installation Manual must be observed. Technical Specifications: Dimensions (LxWxH): 990 x 350 x 40 mm Material: Polypropylene (PP) Wight: 1.700 g Surface extraction capacity: 142,61 W/m² Cooling capacity: 99,83 Watt/module Pressure drop per module: 96 Pa Pressure drop per string: circa 2 kPa (mit 2 x5 m DN 20 Anschlussrohr PP) pipe Operating pressure of the modules: 0,8 to max. 1,2 bar Flow rate per string: 5 l/min Filling capacity: 2 l Maximum string: 10 modules Installation: standing Essential accessories: 50 m DN 32 pipes (approx. 25 m per String), 50 m DN 20 pipes (approx. 6 m per string), DN 32 thermo fusion sockets, DN 32 90° elbow joints (2 pcs. per string), 32x20 reduction sleeves (2 pcs. per string), brine distributor return with flow limiters, brine distributor flow with ball valves, brine filling station, brine (29% ehtylenglycol) circa 50 l per row of modules. The pit for the brine distributor, ground works and installation are provided by the customer.

Attachment 2: Pressure-test protocoll

GeoCollect geothermal absorber system – Pressure test

Project: Ausführende Firma:

Project manager: Protocol No.:

Pressure test with air Pressure test with brine

Nro.: Section Pressure Time Date Signature Notes

1 Start

End

2 Start

End

3 Start

End

4 Start

End

5 Start

End

6 Start

End

7 Start

End

8 Start

End

9 Start

End

10 Start

End

11 Start

End

12 Start

End

13 Start

End

14 Start

End

15 Start

End

Important: The generation of properly issued protocols on all performed pressure tests is a necessary requirement for the extended 10-year warranty provided by GeoCollect GmbH on the supplied geothermal absorber modules.

I hereby confirm, that I have successfully performed a pressure test for the above sections in accordance with the GeoCollect installation manual.

Person performing the test Date / Signature