nilan LMC 223 User manual

JVP 3*
Version: 6.00, 14-09-2012
Software 1.11
*This guidance applies to JVP 3 (740023, SW 1.09)
Installation and User Guide
LMC 223 by Nilan

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Table of contents
Table of contents ............................................................................................................................ 2
Figure ............................................................................................................................................. 3
Tables............................................................................................................................................. 3
General information before installation ........................................................................................... 4
Safety ............................................................................................................................................. 5
System Design ............................................................................................................................... 6
Operation and maintenance ........................................................................................................... 7
Starting the heat pump................................................................................................................ 7
Pressure in ground source loop (ground pipe)............................................................................. 8
Filling the ground source loop with brine..................................................................................... 8
Water pressure in the central heating loop................................................................................ 11
Filling water in the central heating loop..................................................................................... 12
Dirt filters in central heating and ground source loops............................................................... 12
Maintenance and Warranty....................................................................................................... 12
Operation ..................................................................................................................................... 13
Menu Selection......................................................................................................................... 13
Service Menu............................................................................................................................ 13
Setting values ........................................................................................................................... 13
Language.................................................................................................................................. 14
Menu Summary ............................................................................................................................ 15
Operating Status Menu............................................................................................................. 15
Operating Mode Menus............................................................................................................. 15
Main Menus.............................................................................................................................. 15
Function Description..................................................................................................................... 20
Heat pump compressor............................................................................................................. 20
Frequency-controlled compressor (variable capacity) ............................................................... 20
Ground pipe and brine .............................................................................................................. 20
Condenser and heating circulation pump.................................................................................. 20
Permitted area of action for the heat pump ............................................................................... 21
Auxiliary heating........................................................................................................................ 21
Central heating.......................................................................................................................... 21
Curve control via outside temperature....................................................................................... 22
Frost protection......................................................................................................................... 23
Alarm Menu.................................................................................................................................. 24
High pressure alarm.................................................................................................................. 24
Low pressure malfunction......................................................................................................... 24
Leakage.................................................................................................................................... 25
Installation .................................................................................................................................... 27
Electrical connection................................................................................................................. 28
The heat pump must be connected to electrical installation by an authorised electrician........... 28
Floor heating loop..................................................................................................................... 28
Ground source loop .................................................................................................................. 28
Testing for leaks:....................................................................................................................... 30
Brine filling................................................................................................................................ 30
Safety ground coil system......................................................................................................... 30
Isolation of the tubes................................................................................................................. 30
Drainage and collection tray...................................................................................................... 30
Disposal of the heat pump ........................................................................................................ 30
Check list for brine/water pump system at start-up and commissioning ........................................ 31

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Figure
Figure 1: Example of system design............................................................................................... 6
Figure 2: JVP 3 installed with Compact P....................................................................................... 7
Figure 3: LMC 223 Control Unit.................................................................................................... 13
Figure 4: Curve Selection for external temperature compensation................................................ 22
Figure 5: Structural ground source pump system diagram............................................................ 27
Figure 6: Example of layout of ground pipes in a collector............................................................ 29
Figure 7: Example of layout of ground pipes with collection inside footing.................................... 29
Tables
Table 1: List of Alarms.................................................................................................................. 26

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General information before installation

Check that the following documents have been supplied with the unit:
- Installation and User Guide (this document)
- Wiring diagram
If you have any questions concerning installation after reading the guide, please contact your local
Nilan dealer. Find your local dealer here: www.nilan.dk/forhandlere
Control of the system is via a NILAN LMC 223 control unit, which offers a wide range of functions,
for example, menu-driven control, summer/winter operation, outside compensated control, etc.
Before the establishment of a geothermal system, any permits and approvals must be obtained
from relevant authorities.
The Geothermal heat pump JVP is designed for heating homes with low temperature heating sys-
tems with forward-flow temperatures of up to 45 °C.

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Safety
Always disconnect the electrical supply to the heat pump if any malfunction occurs
that cannot be remedied via the control unit.
If any malfunction arises on the electrical part of the heat pump, always contact a
licensed electrician to repair the fault.
Avoid direct contact with the heating system pipes in the heat pump, as they can
be very hot.
Many types of antifreeze are hazardous to health, dangerous when ingested, and
must be kept out of the reach of children.
To protect the heat pump from damage, it is supplied with the following safety
equipment:
Expansion systems for central heating and brine/ground source loop
Safety valves for central heating and brine/ground source loop
Low and high-pressure cut-off switches for compressor
Pressure guard brine loop/ground pipe (mandatory environmental
pressure switch)
Minimum/frost thermostat (cuts off the heat pump if the temperature
becomes too low in the brine loop)
The heat pump must be serviced in accordance with applicable legislation and
regulations to ensure that the system is responsibly maintained and complies with
safety and environmental requirements.
Responsibility for maintenance of the heat pump rests with the owner or user. The
ground source loop contains antifreeze, which can compromise groundwater if
spilled or leaked. Contact an authorised service technician immediately if you sus-
pect there is a leak in your ground source heat system.

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System Design

Electrical installation/power supply (including safety switch) should be installed by an
authorised electrician.
Connect the unit according to the wiring diagram supplied.
Figure 1: Example of system design
Function of ground source heat system
The Geothermal heat pumpJVP is designed for heating homes with low temperature heating sys-
tems with forward-flow temperatures of up to 45 °C, for example floor heating systems.
System components (function)
The ground source heat system obtains heat from the ground through the ground pipe loop (3).
The ground stores heat, which it accumulates from the sun in the summer and releases the heat to
the ground pipe loop (3) in the winter. The temperature in the water/antifreeze mixture (= brine);
from the ground pipes (1). Brine to be protected against freezing form a freezing point of -20 °C to
-18 °C. To exploit the heat energy in the brine, the system uses a heat pump to transfer energy
from a low temperature in the brine to a higher temperature in the central heating system. Circula-
tion pumps (8) maintain flow in both the ground pipe loop (3) and the central heating/floor heating
loop (10).
The heat pump consists of an evaporator (4), compressor (5), condenser (6) and an expansion
valve (7). These elements are connected and filled with a refrigerant in a closed cycle in a closed
system. The antifreeze in the ground source loop is heated by the ground and cooled in the evapo-
rator. After the evaporator the refrigerant is compressed in the compressor and the temperature
and pressure of the refrigerant are increased. In the heat exchange process in the condenser, the
refrigerant then releases heat energy to the central heating water, and the temperature of the cen-
tral heating water rises. After the condenser the refrigerant pressure is reduced in the expansion
valve, and the refrigerant continues into the evaporator where it cools the brine before flowing re-
turn into the ground pipe loop (2).
An auxiliary heating element (9) is installed in the central heating loop, which can supplement the
ground source loop in the event of particularly high heating demand.

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Operation and maintenance

When setting up the system, future service and maintenance should be taken into ac-
count.
Minimum clearance in front of the system of at least 1m is recommended.
Starting the heat pump
Before starting the heat pump, check the following:
Pressure in the central heating system, see Figure 5 no. 17
Pressure in the ground loop, see Figure 5 no. 17
Check that both the central heating loop and the ground source loop have been ventilated.
The central heating circuit has an excess flow valve or other circulation, which ensures the
flow, see Figure 5, no 28
Check list for brine/water pump system at start-up and commissioning (see page 29) must be re-
viewed before starting.
The heat pump can then be switched on at the safety switch.
The heat pump is shut off at the safety switch.
Figure 2: JVP 3 installed with Compact P
1 central heating inflow - (3/4”)
2 central heating return - (3/4”)
3 brine inflow from ground pipe - (1”)
4 brine return from ground pipe - (1”)
5 safety valve - brine loop
6 manometer - brine loop

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Pressure in ground source loop (ground pipe)
The pressure must be inspected as often as several times a day in the initial days. If necessary,
the system must be topped up with brine. See Figure 5, no. 17
Brine pressure will stabilise after a few days and inspection can then be reduced to once a month.
It is important that brine pressure is correct. Too little pressure in the ground source loop can/will
trigger the alarm device in the ground source heat system. (low pressure)
Brine may have to be added a couple of times during the first year in connection with ventilation of
the ground source loop.
Filling the ground source loop with brine
The brine in the ground source loop comprises water and antifreeze. Ethanol, IPA alcohol, eth-
ylene glycol or propylene glycol.
The heat pump is equipped with a low-pressure switch, which ensures that the brine never be-
comes so cold that it freezes solid, and thus the ground source heat pump's heat exchanger is
protected against frost damage.
The frost protection mixture must be adapted to the operating temperatures in the ground source
loop. It is very important that the frost protection fluid is mixed thoroughly before it is added to the
ground source loop as no mixing takes place in the ground pipes. Failure to do so increases the
risk of the heat pump freezing, thus creating a potential risk of frost damage. Brine may only be
added/topped up by an authorised technician. Before loading, check that the ground coils are tight.
How to fill brine into the ground source loop before start:
Switch off the heat pump and the circulation pump at the main switch before filling
brine into the system
Shut off one valve at the circulation pump of the brine circuit. Figure 5: Structural
ground source pump system diagram.

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, item 18 and 19
By means of a combined filling and venting tank, the brine loop is filled through the
filler tap until the loop is compeletely full Figure 5: Structural ground source pump
system diagram.

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, item 13. Duration minimum 1 hour.
The shutter tap at the cirkulation pump in the brine loop Figure 5: Structural ground
source pump system diagram.