USER MANUAL
LÄMPÖÄSSÄ
T/P 10 – 31
LÄMPÖÄSSÄ 5/2013
Ground Source Heat Pumps Since 1983
As Long As the Sun Exists
Let Mother Earth Heat Your Home
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Ground Source Heat Pumps Since 1983
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Ground Source Heat Pumps Since 1983
Content
1. GENERAL INFORMATION 4
1.1. Safety precautions 4
1.2. Transportation 4
1.3. Installation area 4
1.4. Removing the packaging 5
1.5. Structure and operating principles 5
1.5.1. Structure 5
1.5.2. Operation 5
2. INSTALLATION 6
2.1. Before installation 6
2.2. Pipe-laying 6
2.3. Connecting the collector pipe 7
2.4. Filling and de-aeration of the ground loop 7
2.5. Boiler connection 9
2.6. Heating connection 10
2.7. Domestic water connection and circulation of water 10
2.8. HEPAC check list 10
2.9. Electrical installation 11
2.9.1. Main switch 11
2.9.2. Sensors 11
2.9.3. Actuators 12
2.10. Electricity check list 12
2.11. Operating switches 12
2.12. Before startup 12
2.13. Startup 12
3. USER INFORMATION 14
3.1. Lämpöässä settings 14
3.2. Care and maintenance 14
3.3. Troubleshooting 14
4. TECHNICAL SPECIFICATIONS 16
4.1. Chart 16
4.2. Space requirements 16
5. WARRANTY 17
6. APPENDIX 17
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Ground Source Heat Pumps Since 1983
1. GENERAL INFORMATION
We thank you for your condence in our products and congratulate you on making an excellent choice! You have
selected a long-lasting and environmentally friendly Lämpöässä geothermal heat system. We hope that you will enjoy
Lämpöässä’s heating system which will give you peace of mind for decades. It is important to read the user and
maintenance instructions carefully. Please retain this manual for future use and reference should problems occur.
1.1. Safety precautions
To ensure the Lämpöässä geothermal heat system operates in a trouble-free manner and in order to obtain the best
operating efciency, the system must be transported and installed in accordance with the instructions provided by the
manufacturer. After installation is complete, the check list provided must be reviewed in order to minimise any installation errors. The manufacturer shall not be responsible for any breakages of equipment which is not installed correctly
or any costs incurred as a result of this.
The pipe and electrical installations for the Lämpöässä geothermal heating system can only be installed by qualied
persons. If problems occur during installation, we recommend that you contact your retailer or our maintenance
department. The telephone number for the maintenance department can be found in the documents delivered with the
Lämpöässä heat pump. Electrical connections for the installation of the Lämpöässä may only be set up by qualied
electricians.
In Lämpöässä T and P models – to prevent a compressor breakdown – the compressor and water in the storage tank
must be preheated for 6 hours before the heat pump is started for the rst time. Press the motor protective switch down
and switch on the power. This stops the compressor starting and enables the electrical immersion to heat up the
compressor and water in the storage tank. The compressor can be started after 6 hours of preheating.
The warranty of the
Lämpöässä T
compressor is not
valid if preheating
is not carried out.
1.2. Transportation
The Lämpöässä heat pump must always be transported in a vertical position. If tilting the system is unavoidable, for
example to pass through a doorway, it may only be tilted to the left side or back as seen from the front of the heat
pump. The unit may be moved from beneath using a forklift, for example. Do not go underneath the equipment while
it is being lifted!
A transportation platform is fastened on both sides of the heat pump using screws. When the screws on the platform
are removed, the adjustable feet used for nal installation can be found inside.
1.3. Installation area
We recommend that the Lämpöässä geothermal heat pump be installed in a warm space which has a oor drain. During
installation and when lling of the ground loop, some geothermal uid mixture may be splashed on the oor. Glycol/water mixture
can be used as well. The chosen area does not have to be reproof. The oor must be able to withstand the weight of the
heat pump and a full water tank. The oor must also be sufciently even, because the heat pump must be as level as
possible. Final adjustments can be made using the adjustable feet underneath the equipment.
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Ground Source Heat Pumps Since 1983
1.4. Removing the packaging
Remove the plastic wrapping and corner padding from around the product. Check that the heat pump has not suffered any
damage during transportation. If the heat pump is found to be damaged, the company which delivered the product must be
immediately notied. Also check the contents of the delivery immediately.
1.5. Structure and operating principles
1.5.1. Structure
The Lämpöässä geothermal heat system consists of a network of heat collection pipes, a geothermal uid mixture circulating
within the network and a geothermal heat pump unit. The geothermal heat pump unit consists of a compressor, evaporator,
condenser and a refrigerant circulating inside the pump. The heat collection uid in the ground loop and the refrigerant
do not mix at any stage of the process.
1.5.2. Operation
The Lämpöässä heat pump transfers heat from the ground,
water system or a bore well. Of the total thermal energy required for heating, Lämpöässä collects more than 70% from
natural sources. Less than 30% of the electrical energy is
required for the collection of thermal energy. This energy is
used to run the various components in the system.
The heat collection pipe is a plastic pipe (PEM 40/10) with a water and ethyl alcohol or glycol-water mixture circulating
inside. It is placed 1-1.2 metres deep in the ground or at least 3 metres deep in water. The bore well is normally 100200 metres deep with a diameter of 140-165 mm. The heat pump is used in the transfer of heat from the water and
ethyl alcohol mixture. Approximately three degrees of heat is transferred into the refrigerant circulating inside the heat
pump, after which the geothermal uid returns to the ground loop to heat up again.
Heat is transferred from one uid to another in the evaporator, in which the refrigerant evaporates thanks to the low
suction head of the compressor. This binds the heat from the geothermal uid with the help of a disk thermal exchanger. The pressure of the gaseous refrigerant is increased using a compressor which makes the temperature of the refrigerant rise. The heat contained in the gas is transported in the condenser to heat the water in the water tank and thus
produce hot water for use. As the heat is transferred, the gas turns into uid once again and is carried back through a
dehumidication lter and an expansion valve to circulate.
The Lämpöässä geothermal heat pump is suitable for producing hot water and heating single-family households, terraced houses, ofces, hotels and industrial halls. Heat distribution can be implemented using oor heating with circulating water, water-lled radiators or the circulation of hot air. Floor heating has the best operating efciency. In order
to ensure trouble-free operation, all Lämpöässä heat pumps have been test-run, set up and tested by the
manufacturer.
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Ground Source Heat Pumps Since 1983
2. INSTALLATION
2.1. Before installation
Pipe assemblies for the installation of the Lämpöässä system may only be installed by qualied persons. The unit must
be installed in accordance with the instructions provided and a check list must be reviewed after installation in order
to minimise errors. The manufacturer shall not be responsible for any breakages of equipment which is not installed
correctly or any costs incurred as a result of this.
Check that
• all the required hoses and sensors are included in the delivery
• the heat pump has been correctly tted
• the assemblies on top of the heat pump are intact
• the fuse size is correct for the main fuse and the heat pump (see technical specications)
• collector pipes and the feed pipes have been installed correctly
2.2. Pipe-laying
Assemblies of the:
Lämpöässä T 10-15 Lämpöässä P 10-15
1
4
5
3
2
1. To the boiler (Cu 28mm)
2. From the boiler (Cu 28mm)
3. From the superheater (Cu 15mm)
4. To the superheater (Cu 15mm)
5. Lead-through sensors / electric
1
5
2
Assemblies of the:
Lämpöässä T 21-31 Lämpöässä P 21-31
1. To the boiler (Cu 28mm)
2. From the boiler (Cu 28mm)
3. To the superheater (Cu 15mm)
4. From the superheater (Cu 15mm)
5. Lead-through sensors / electric
1
5
2
2
1
4
5
3
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Ground Source Heat Pumps Since 1983
2.3. Connecting the collector pipe
Assemblies of the:
Lämpöässä T 10-15 Lämpöässä P 10-15
1
2
Collector pipe assemblies optionally on
both sides. Connect asseblies to the
collector pipe with care.
1. Collector pipe, ow (Cu 28mm)
2. Collector pipe, return (Cu 28mm)
Unused assemblies must be plugged.
1
2
Assemblies of the:
Lämpöässä T 21-31 Lämpöässä T 21-31
1
2
Collector pipe assemblies on the side.
Connect asseblies to the collector pipe
with care.
1. Collector pipe, ow (1¼” uk)
2. Collector pipe, return (1¼” uk)
1
2
2.4. Filling and de-aeration of the ground loop
Equipment required for the lling and deaeration of the ground loop:
• container, 60 litres
• a submersible pump tted with a lter, lifting height approximately 30 m
• water and ethyl alcohol, or glycol-water mixture (1:1) with a frost resistance of -17 degrees Celsius
• 2 x textile hose 1-2”
• couplings adaptable to lling unit
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Ground Source Heat Pumps Since 1983
THE FILLING AND DE-AERATION PROCESS OF T 10-15 / P 10-15
Please check that the ground loop has been correctly connected (see “Connecting the ground loop” section) and that
the compressor has been preheated (see ”Safety precautions” section).
1. Install lling and de-aeration assemblies to the collector pipe (return) according to the picture beside
2. Attach textile hoses to lling unit
• Attach a textile hose from submercible pump to the lling unit (between brine pump and shut-off valve).
• Attach the textile hose from lling unit (between shut-off valve and collector pipe) to mixing tank.
2
1
3
4
3. Fill the container with a geothermal uid mixture (ethyl alcohol water 1:1 or glycol)
4. Open lling unit valves (nr 2 and 3) and close the shutt-off valve (nr 1)
5. Turn on the submercible pump.
6. Add water and ethyl alcohol mixture to the mixing tank until no more uid can enter the pipes.
7. Use the brine pump of the ground source heat pump to accelerate the circulation.
• Turn the main switch (Q1) and the heating switch (S2) on.
• Turn the switch S4 (Auto - 0 - Maalämpö) to the position 0 (compressor running prevented).
• Check that motor protection switces (QM1, QM2) are on.
• Turn the control current (F3) on. The brine pump starts. Check the rotation direct of the brine pump
by using the switch S2.
Keep the submercible pump running until the uid is clear and no gurgling can be heard from the pipes. Please note!
Deaeration usually takes several hours and helps ensure that all the air is removed from the system and that there are
no malfunctions once the system is started.LEAVE NO PRESSURE IN THE NETWORK!
8. Turn pumps off.
9. Close lling unit valves (nr 2 and 3)
10. Remove textile hoses.
11. Clean the ball valve with integral lter of both collector loops.
12. Open the valve nr 1.
13. Install the expansion tank (nr 4) to the de-aeration assembly (nr 3)
14. Fill the expansion tank with ethyl alcohol m ixture (2/3 capacity)
15. Install the safety valve to the top of the expansion tank
16. Open the de-aeration assembly (nr 3)
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Ground Source Heat Pumps Since 1983
THE FILLING AND DE-AERATION PROCESS OF T 21-31 / P 21-31
Please check that the ground loop has been correctly connected (see “Connecting the ground loop” section) and that
the compressor has been preheated (see ”Safety precautions” section).
1. Install lling and de-aeration assemblies to the collector pipe (return) according to the picture beside
2. Attach textile hoses to lling unit
• Attach a textile hose from submercible pump to the lling unit (nr 2)
• Attach the textile hose from lling unit (nr 3) to the mixing tank.
3. Fill the container with a geothermal uid mixture (ethyl alcohol water 1:1 or glycol)
4. Open lling unit valves (nr 2 and 3) and close the shutt-off valve (nr 1)
5. Turn on the submercible pump.
6. Add water and ethyl alcohol mixture to the mixing tank until no more uid can enter the pipes.
7. Use the brine pump of the ground source heat pump to accelerate the circulation.
• Turn the main switch (Q1) and the heating switch (S2) on.
• Turn the switch S4 (Auto - 0 - Maalämpö) to the position 0 (compressor running prevented).
• Check that motor protection switces (QM1, QM2) are on.
• Turn the control current (F3) on. The brine pump starts. Check the rotation direct of the brine pump by
using the switch S2.
Keep the submercible pump running until the uid is clear and no gurgling can be heard from the pipes. Please note!
Deaeration usually takes several hours and helps ensure that all the air is removed from the system and that there are
no malfunctions once the system is started. LEAVE NO PRESSURE IN THE NETWORK!
8. Turn pumps off.
9. Close lling unit valves (nr 2 and 3)
10. Remove textile hoses.
11. Clean the ball valve with integral lter of both collector loops.
12. Open the valve nr 1.
13. Fill the expansion tank with ethyl alcohol m ixture (2/3 capacity)
14. Install the safety valve to the top of the expansion tank.
Filling and deaeration have now been completed. Install the expansion tank, if the collector pipe is planned to be
pressurized. PLEASE NOTE! Once the heat collecting pipes have been placed in a bore well, we would advise users to
switch the positions of the textile hoses in the group of ll valves during lling and deaeration. This increases the efciency of the pipes.
2.5. Boiler connection
Connect the boiler to the ground source heat pump accordingly the HWAC drawings (chapter 6). The connection may
vary depend on the boiler type. It is needed to add a trim valve to reduce superheat circuit ow. The factory setting for
trim valve is fully open. Close the valve at rst. Then open the valve to the right position according to the following
table. It is possible to tune the amount of superheat according to the need afterwards.
Heat pump T 10 T 13 T 15 T 21 T 31
Adjustment of trim valve open 1 round open 1 round open 1 round open 2 rounds open 2 rounds
1
3
2
4
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