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

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

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

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.

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.

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.

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

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.

, 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.

, 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.

item 18 and 19, is reopened, and the pump is filled up and vented

If brine has to be repeatedly added to the ground source loop, this indicates that the ground pipes

are leaking.

ALWAYS contact an authorised service technician immediately if you suspect leakage.

Water pressure in the central heating loop

The water pressure in the central heating loop must initially be inspected as often as several times

a day. Top up the system with water, if necessary, see Figure 5 item 13

The water pressure will stabilise after a few days and inspection can then be reduced to once a

month. If you have to add water to the central heating loop beyond the start-up phase, the system

must be checked for leaks.

Filling water in the central heating loop

Switch off the heat and circulation pumps at the main switch.

Fill water into the central heating loop via the filler cock, Figure 5, item

13, until the correct water pressure is achieved, Figure 5, item 17

The automatic vents on the heat tank, central heating loop, etc., are

activated automatically when water is added to the system.

Add water to the system until the water pressure is correct. If the wa-

ter pressure disappears entirely during filling, filling must be restarted

right from the beginning.

Restart the heat pump at the main switch.

Dirt filters in central heating and ground source loops

Immediately after the heat pump has been commissioned, a certain amount of dirt can accumulate

in both loops. The dirt filter is located in the central heating string and in the ground pipe string out-

side the heat pump, as shown in Figure 5

The filters must be checked and cleaned several times daily after installation of the heat pump until

the filters remain clean. In normal operation of the heat pump, it should be sufficient to check the

filter twice a year.

Cleaning the dirt filters:

Switch off the heat pump at the main switch.

Close the shut-off valves on each side of the filter.

Pull out filter and rinse until clean.

Replace the filter and open the shut-off valves. Then switch on the

heat pump at the main switch.

Maintenance and Warranty

The heat pump must undergo appropriate service in accordance with applicable laws and regula-

tions in order to keep the plant maintained in good condition and to fulfill demands on safety and

environmental compliance. It is recommended that the owner / operator immediately after commis-

sioning of the facility shall consult with a qualified service technician about the scope and

frequency of servicing.

The responsibility for maintenance of the heat pump is for the owner’s / user’s. Geothermal circuit

containing coolant that can harm groundwater by leakage. Immediately contact a qualified service

technician by suspected leaks in your geothermal system.

The installer of heat pump is obliged to provide an assurance to the owner / operator in accord-

ance with applicable laws and regulations. For specific warranty terms refer to the owner / user

agreement with his supplier.

A prerequisite for warranty obligation is that servicing and maintenance is carried out as described.

Operation

The JVP is equipped with a control unit (see below).

Figure 3: LMC 223 Control Unit

The control unit is used to control heat pump operation.

The unit has 2 diodes to the left of the display:

- the upper diode is illuminated when the heat pump is operating.

- the lower diode is illuminated when the auxiliary heating is operating.

The backlight in the display flashes when the system's alarm device is triggered.

Nilan LMC220 control unit is controlled solely by turning the knob to the right of the display. The

knob has three functions:

- Turn clockwise: Go to next menu item or increase the last value in the display.

- Turn anticlockwise: Go to previous menu item or reduce the last value in the display.

- Press: Select sub-menu, activate adjustment of value, or approve the last value.

The light in the display is illuminated when the unit is being operated. The light switches off after 30

seconds if the unit is not activated by the user. The control unit will revert to the start screen (status

menu) after five minutes if the unit is inactive.

Menu Selection

To switch between the menus, turn the knob.

Menus with an arrow at bottom right also have a sub-menu. To activate a sub-menu, press once

on the knob. To switch between sub-menu items, turn the knob. To exit the sub-menu, turn forward

or back until "Menu up" appears in the display. Then press the knob.

Service Menu

The sub-menus in the service menu are not accessible during normal operation. They are for use

in connection with installation and service.

Setting values

To set values in the display:

- Turn the knob until the value you wish to change is shown in the display.

- Press the knob to activate the value. The value will flash, if it can be changed.

- To change the value, turn the knob.

- Press the knob to accept the value shown. The value will stop flashing.

Language

At the bottom of the service menu, you can select various languages:

- Turn the knob clockwise until the service menu is displayed.

- Press the knob to activate the service menu.

- Turn the knob until the LANGUAGE menu is shown in the display.

- Press the knob. The text in the display flashes.

- Turn the knob forward or back until the desired language is displayed.

- To approve the language, press once on the knob. The text stops flashing.

Menu Summary

Operating Status Menu

The system's current operating status is displayed as the initial screen in the main menus.

OFF

The system is switched off. All functions are inactive, except:

- Alarm from ground pipe environmental pressure switch

- Circulation pump periodic test run and frost protection

START

Start heat pump. Circulation pumps start. Switch after a short time to operational

READY

The system is switched on but there is no current heat demand

HEATING

Room heating. Central heating temperature in the house at the desired value

WATER

Domestic hot water production

MANUAL

The user has activated manual operation via the service menu

ALARM

Alarm device triggered. The system continues to operate but with reduced function

STOP

The system was stopped due to a critical malfunction

Operating Mode Menus

In the OPERATION menu, the following operating modes can be selected:

OFF

No heating functions are active

SUMMER

Normal condition is domestic water. Central heating is not active

WINTER

Normal condition is central heating, which switches to domestic water as needed

AUTO

The system selects operating mode based on average outside temperature,

set summer temperature and a 3°C neutral zone

- Winter: After 24 hours under summer temperature minus neutral zone

- Summer: After 24 hours above summer temperature

When user function HEATING has been choice in "SELECT" in the "SERVICE",

summer/winter mode is chosen by an external signal on digital input DI4

Main Menus

Parameters in blue text below can be adjusted by authorized service personnel / user. The product

is delivered with factory settings as indicated.

Shaded cells must often change

STATUS *

HEATING

Readout of current operation status text

* Symbol indicates that a user function is active on the digital input

This is the main screen

OPERATION

WINTER

The unit's main switch and selection of overriding operating mode

In operating mode AUTO the choice can be by user function HEATING on digi-

tal input. [OFF, SUMMER, WINTER, AUTO]

T USER

EXT 15°C

Alternative setting selected via user function digital input

(shown only if a user function with setting is selected (COOL, DELAY)

READOUT



Sub-menu for display of current sensor and control data

T WATER

45°C

Domestic water tank temperature

T HEAT*

CURRENT

33°C

Central heating temperature

T HEAT*

SET 32°C

Current setting for central heating temperature. Recommended flow central

heating temperature is 30 ° C to 45 ° C. Fixed value or variable value using

outdoor compensation.

T OUT

12°C

Outside temperature

EVAP. T

-2°C

Evaporator temperature, Indicates the temperature of the cooled brine in the

evaporator

CP CAP

60 %

Current compressor capacity (%)

(shown only if compressor speed control is selected)

CURVE

+/-0°C

Raises or lowers the calculated curve setting a fixed value (°C) [-9..9] (shown

only if curve control is selected) - See the menu CENTRAL HEAT

* Version 1.09 displayed T HEAT as T RETUR

... Menu continued from previous page:

SET



Menu normally hidden

(to activate this menu, press knob for 8 secs while the Status Menu is active)

HEATING

PUMP 

AUX

OFF

Auxiliary heating released for operation (for both domestic water and central heating)

[OFF, ON]

DELAY

AUX 30m

Delaying connection of auxiliary heating gives the heat pump a better chance to meet

demand

[0..60]

RESTART

CP 30m

Compressor restart time to prevent unnecessary wear (between two consecutive starts)

[2..60] minutes

STOP

CP 10m

Minimum stop time for the compressor (time from stop to start)

[0..15] minutes

COMPRESS

MIN OFF°C

Minimum outside temperature for compressor operation. If colder, stopped compressor

and EL takes over [OFF, -25..-10] °C

COMPRESS

MAX 47°C

Max temperature to permit compressor running. (stop to avoid pressure overload of

condenser)

[40..80] Max. Temperature is Twater (T2) for SHWt and Theat (T1) for central heating.

T SUMMER

15°C

Level for automatic switch between summer and winter operation

[0..30]

CP LEVEL

RPM

Select compressor operating mode on/off or RPM regulation

[1 LEVEL, RPM]

STOP %

Compressor stop capacity

(shown only when RPM compressor level selected)

ST DIFF%

Compressor start difference

(shown only when RPM compressor level selected)

U MIN %

Minimum voltage to frequency converter

(shown only when RPM compressor level selected)

U MAX %

100

Maximum voltage to frequency converter

(shown only when RPM compressor level selected)

U START%

Initial voltage to frequency converter

(shown only when RPM compressor level selected)

U 60°C %

MIN 30

Compressor RPM limit in heating operation as a function of the current setting - curve

max. [MIN, OFF] (shown only when RPM compressor level selected)

U 40°C %

MIN 20

Compressor RPM limit in heating operation as a function of the current setting - curve

min. [MIN, OFF] (shown only when RPM compressor level selected)

GAIN

Enhancement of PI regulator (factory setting: 5 % per ℃)

(shown only when RPM compressor level selected)

PI regulator integration period (factory setting: 5 minutes)

(shown only when RPM compressor level selected)

VENT HI

Capacity for transfer between high/low ventilator speed

U LOW %

Voltage for low ventilator capacity

U HI %

100

Voltage for high ventilator capacity

CIRCPUMP

CONTIN

Select operating mode for central heating circulation pump (on/off only with buffer tank)

[CONTIN, ON/OFF]

Important:

The parameters menu HEATPMP must be set by authorized service personnel.

Parameters in gray boxes changed as required, while the other parameters should not be

changed.

... Menu continued from previous page:

DOMESTIC

WATER 

Geothermal heat pump JVP is designed for HEATING

For SHW it should only be used as back-up or as preheating

HEATING

OFF

Heat source selection for domestic water production

[OFF, HP, AUX, HP+AUX]

MINIMUM

35°C

Temperature setting for auxiliary heating (if released and selected)

[5..80]

SETTING

45°C

Temperature setting for heat pump compressor

[5..60]

NEUTRAL

ZONE 4°C

Dead time for connecting. Heating starts at setting minus this value

[1..9]

CP CAP

60 %

Compressor capacity during domestic hot water production. (Factory setting 60 %)

LEGIO

DAYS OFF

Legionella function frequency (auxiliary heating must be released for operation)

[OFF, 7..30] days

CENTRAL

HEAT 

CTR HEAT

HP+AUX

Heat source selection for room heating

[OFF, HP, AUX, HP+AUX]

T HEAT

MIN 35°C

Setpoint of the housing central heating temperature and setpoint-heating [5 0.60].

Recommended central heating temperature is 30 ° C to 45 ° C. By TEMP CTR, AMB

COMP will restrict the central heating temperature, downwards, and must therefore

be adjusted the curve.

T HEAT

MAX 45°C

The maximum permitted setpoint for the building central heating temperature

[5 0.60] By TEMP CTR, AMB COMP will restrict the central heating temperature up

to MAX

NEUTRAL

ZONE 3°C

Dead time for connecting. Heating starts at setting minus this value

[1..9]

TEMPCTRL

MIN

Central heating temperature control function

[MIN, OUT COMP]

CURVE

SELECT

Outside temperature compensation curve (Curve Menus displayed if selected under

CONTROL) [DEF, 1..10]

CURVE

+/-0°C

Raises or lowers the calculated curve setting a fixed value (°C)

[-9..9]

CURVE -

DEF 50°C

Manually-selected five-interval out/in curve (at -20, -10, 0, 10 and 20 °C) for central

heating temperature [5..60]

CURVE -

DEF 45°C

CURVE 0

DEF 40°C

CURVE+10

DEF 35°C

CURVE+20

DEF 30°C

Parameters menu, DOMESTIC WATER and CENTRAL HEAT needs to be set by authorized ser-

vice personnel

Parameters in gray boxes changed as required, while the other parameters should not be changed

* Version 1.09 displayed T HEAT as T RETUR

DEFROST



TYPE

OFF

Choosing the defrosting method

[OFF, HOTGAS, AIR, AIR+HG]

MAN DE-

FROST

OFF