Nibe ACVM 270 User manual

INSTALLATION AND MAINTENANCE INSTRUCTIONSMOS GB 1337-5
NIBE™ SPLIT
431156 NIBE™ SPLIT
ACVM 270, AMS 10
LEK
LEK
LEK

LEK LEK
1
2
LEK
LEK
7
LEK
5
6
LEK
3
4
LEK
LEK
LEK LEK
AMS 10-8
LEK
LEK
AMS 10-12

For Home Owners
General
3
Installation data 3
Information about the installation
Product information 4
Features of NIBE SPLIT 4
Principle of operation NIBE SPLIT 4
Front panel, indoor module
How to use the front panel 6
Menu types 6
Quick movement 6
Key lock 6
Comfort setting heating
General 7
Operating status 7
Changing the room temperature manually 7
Default setting 8
Readjusting the default settings 9
Comfort setting cooling
General 10
Cooling operated from the outdoor sensor in operating
mode AutoK 10
Controlling cooling mode using the room sensor 10
Comfort setting hot water
Available volume (ACVM 270 with AMS 10-8) 11
Available volume (ACVM 270 with AMS 10-12) 11
Prioritizing 11
Extra Hot Water 11
Maintenance
Checking the safety valves in ACVM 270 12
Pressure gauge in ACVM 270 12
Emptying the hot water heater 12
Emptying the vessel 12
Maintenance of AMS 10 12
Saving tips 12
Dealing with comfort disruption
Operating mode "Add. heat only" 14
Emergency mode 14
Alarm indications
What happens in the event of an alarm? 15
Recommended actions 15
Acknowledging alarms 15
For the Installer
General information for the installer
Transport and storage 16
Supplied components 16
Assembly 16
Dimensioning expansion vessel 17
Manual shunting 17
Emptying the vessel 17
Recommended installation order 17
Pipe installation
General 18
System requirements 18
Dimensions and pipe connections 18
Pump capacity diagram 18
Connecting the climate system 18
Connecting the hot water heater 19
Connection of external heat source 19
Waste exchanger part 19
Connecting refrigerant pipes (not supplied) 19
Dockings 22
Electrical installation
General 27
Electrical components 27
Connecting the supply 28
Miniature circuit-breaker 28
Temperature limiter 28
Connection between ACVM 270 and AMS 10 28
Setting max power, electrical addition 29
Setting max boiler temperature 29
EBV board, terminal and wiring diagram 29
Connecting the outside sensor 29
Connecting the current limiter 29
Connection of centralised load control/tariff 30
Connecting external contacts 30
Alarm outputs 30
Docking specific connection 30
Start-up and inspection
Preparations 32
Commissioning 32
Setting system flow heating 32
Setting system flow cooling 32
Commissioning ACVM 270 without AMS 10 33
Checking external addition with internal immersion heater
blocked 33
Checking external addition (not controlled by ACVM 270)
with internal immersion heater as backup 33
Inspection of the installation 33
Cleaning the particle filter 33
Secondary adjustment 33
Checklist: Checks before commissioning 34
Miscellaneous
Control
Display 35
Menu types 35
Menu management 35
Menu tree 36
Main menus 44
1.0 [N] Hot water temp. 45
2.0 [N] Supply temp. 46
3.0 [N] Supply temp. 2 47
4.0 [N] Outdoor temp. 48
5.0 [N] Heat pump 48
1NIBE™ SPLIT
Table of Contents

6.0 [N] Room temperature 49
7.0 [N] Clock 49
8.0 [N] Other adjustments 50
9.0 [S] Service menus 51
Alarm list
Acknowledging alarms 57
Alarm with automatic reset 57
Temperature limiter alarm 57
ACVM 270 alarm 57
AMS 10 alarm 58
Hot water alarm 60
Supply alarm 60
Outdoor sensor alarm 61
Electrical circuit diagram
ACVM 270 62
AMS 10-8 67
AMS 10-12 67
Component positions
Indoor unit 69
Outdoor unit 71
Temperature sensor
Sensor placement 73
Data for sensor in AMS 10 73
Data for sensor in ACVM 270 73
Dimensions
Indoor unit ACVM 270 74
Outdoor unit 75
Technical specifications
Technical specifications 77
Accessories
81
Safety precautions
Caution 83
Care 83
Especially for units intended for R410A 84
Item register 85
NIBE™ SPLIT2
Table of Contents

General
NIBE SPLIT is a system for heating, cooling and producing hot water for small houses. The system consists of an outdoor
module (AMS 10), which utilises the energy in the outdoor air and sends it to the indoor module (ACVM 270), which takes
care of the regulation and heat distribution in the house.
In order to gain the greatest benefit from the NIBE SPLIT system, please refer to the 'For Home Owners' chapter within this
Installation and Maintenance Manual.
NIBE SPLIT is a quality system offering a long service life and reliable operation.
Installation data
Completed by the installation engineer when the sys-
tem is installed
Installation data and installation check list on page 34
must be filled in by the installer in order for the warranty
to apply.
The Serial number must always be stated in all correspondence with NIBE.
Outdoor unit:Indoor unit:
Installation date:
Check list, page 34, filled in
Installation engineers:
Heating
Radiator Floor Fan convector
Cooling
Other Floor Fan convector Not available
External heat source
Solar Gas Oil Wood Pellets Electricity
Accessories
KVR 10 RE 10 RG 10 ESV 22 VCC 22 ACK 22 SRB 22
Settings
Enter deviations from default settings.
SettingMenuSettingMenu
..........................................................................................................................................................................................
..........................................................................................................................................................................................
..........................................................................................................................................................................................
..........................................................................................................................................................................................
Date __________ Signed __________________________________
This appliance can be used by children aged
from 8 years and above and persons with
reduced physical, sensory or mental capabil-
ities or lack of experience and knowledge if
they have been given supervision or instruc-
tion concerning use of the appliance in a
safe way and understand the hazards in-
volved. Children shall not play with the appli-
ance. Cleaning and user maintenance shall
not be made by children without supervision.
Rights to make any design or technical
modifications are reserved.
©NIBE 2013.
3NIBE™ SPLIT
For Home Owners
General

Information about the installation
Product information
NIBE SPLIT is a complete modern heat pump system that
offers effective energy saving and reduced carbon dioxide
emissions. Climate control is safe and economical with in-
tegrated hot water heater, immersion heater, circulation
pump and control system in the indoor module.
The heat is retrieved from the outdoor air through an
outdoor module (AMS 10), where the refrigerant, which
circulates in a closed system, transfers the heat from the
heat source (outdoor air) to the indoor module (ACVM
270). This eliminates the need for bore holes and coils in
the ground.
Features of NIBE SPLIT
႑Optimal annual heating factor thanks to the inverter
controlled compressor.
႑Outdoor unit with compact dimensions.
႑Speed controlled circulation pump.
႑Optimized operating costs. The speed of the compressor
is adjusted according to the demand.
႑Integrated coil water heater in ACVM 270.
႑Integrated clock for scheduling extra hot water and
temperature lowering/increasing the flow line temper-
ature.
႑Prepared for control of two climate systems.
႑Integrated active cooling function.
႑Possible to connect external heat sources.
Principle of operation NIBE SPLIT
12
4
3
Function
NIBE SPLIT is a system that can produce heating, hot water
and cooling.
The principle during heating can be simplified as follows:
1. The refrigerant in AMS 10 retrieves heat from the
outdoor air then compresses it, which increases the
temperature further.
2. The hot refrigerant (now in gas state) is routed into
ACVM 270.
3. The refrigerant releases the heat for further distribu-
tion in the system.
4. The refrigerant (now in liquid state) is routed back to
AMS 10 and the process is repeated.
By reversing the process, thereby allowing the refrigerant
in AMS 10 to retrieve the heat from the water and release
it into the outdoor air, the heat pump can, if necessary,
cool instead.
ACVM 270 determines when AMS 10 is to work and not
to work, using the collated data from the temperature
sensor. In the event of extra heat demands, ACVM 270 can
connect additional heat in the form of the internal immer-
sion heater, or any connected external addition.
NIBE™ SPLIT4
For Home Owners
Information about the installation

Front panel, indoor module
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5NIBE™ SPLIT
For Home Owners
Front panel, indoor module

How to use the front panel
All the most common settings are made from the panel
as well as control computer instructions such as comfort
etc. that you require the heat pump system to fulfil.
In order for the installation to be used optimally, certain
basic settings must have been made (see page 8). In ad-
dition the installation in general must be carried out ac-
cording to the instructions and manufacturer's recommend-
ations.
Menu 1.0 (the temperature in the water heater) is
normally shown on the display.
The plus and minus buttons and the enter button
are used to scroll through the menu system as well
as to change the set value in some menus.
Menu types
Control is divided into different menu types depending
on how ”deep” into the controls you need to go.
႑Normal [N]: The settings you as a customer often
need.
႑Extended [U]: Shows all detailed menus except the
service menus.
႑Service [S]: Shows all menus.
Changing of menu type is done from menu 8.1.1
Quick movement
To quickly return to the main menu from a sub menu,
press one of the following buttons:
Key lock
A key lock can be activated in the main menus by simultan-
eously pressing the plus and the minus buttons. The key
symbol will then be shown on the display.
The same procedure is used to deactivate the key lock.
NIBE™ SPLIT6
For Home Owners
Front panel, indoor module

Comfort setting heating
General
The indoor temperature depends on several factors.
႑Sunlight and heat emissions from people and household
machines are normally sufficient to keep the house warm
during the warmer parts of the year.
႑When it gets colder outside, the climate system must be
started. The colder it is outside, the warmer radiators
and under floor heating systems must be.
Controlling heat production
Normally, the heat pump heats the water (heating medi-
um) to the temperature required at a certain outdoor
temperature. This occurs automatically on the basis of the
collected temperature values from the outdoor temperat-
ure sensor and sensors on the lines to the climate system
(flow line sensors). Extra accessories such as room temper-
ature sensors, can influence the temperature.
However, the correct default settings must be made on
the heat pump first, see the section “Default settings”.
The temperature information that the outdoor sensor
(mounted on an exterior wall of the house) sends to the
heat pump’s control computer senses variations in the
outdoor temperature early on. It does not have to be cold
inside the house before the control system is activated, as
soon as the average outdoor temperature drops outside,
the temperature of the water to the climate system (supply
temp.) inside the house is increased automatically.
The heat pumps flow temperature (menu 2.0) will hover
around the theoretical required value, which is in brackets
on the display.
Temperature of the climate system
The temperature of the climate system in relation to the
outdoor temperature can be modified by using the "Offset
heating curve” knob on the heat pump’s front panel.
Operating status
The “Operating mode” button is used to set the re-
quired operating mode with regard to permitting/block-
ing the circulation pump and additional energy.
The change does not need to be confirmed with the
enter button.
The current operating mode is shown on the front panel
display when the button is pressed and the mode changes
when you continue to press the button.
The display returns to the normal display mode once the
enter button is pressed.
The addition is only used for anti-freeze mode, if it is deac-
tivated in the menu system. This applies to all operating
modes.
The different operating modes are:
1. ”Auto”
႑ACVM 270 automatically selects the operating mode
by taking the outdoor temperature into account.
This means that the operating mode switches
between "Heating" and "Hot water". Current oper-
ating mode is shown within brackets.
႑The circulation pump is permitted to operate when
there is a need.
2. ”AutoK”*
႑ACVM 270 selects operating mode automatic
(cooling can also be selected now) with regard to
the outdoor temperature. This means that the oper-
ating mode switches between "Heating", "Cooling"
and "Hot water".
႑The circulation pump is permitted to operate when
there is a need.
3. "Heat" / "Heat addition"
႑Only heating and cooling produced.
႑The circulation pump is in operation the entire time.
႑If "Heat addition" is shown the addition is permitted
to operate if necessary.
4. "Cooling"* / "Super cooling"
႑If addition is permitted, "Super cooling" is displayed.
The compressor then only runs in cooling mode.
Otherwise, the mode switches to cooling or produ-
cing hot water.
႑The circulation pump is in operation the entire time.
႑Hot water is only produced by the immersion heater.
5. "Hot water"
႑Only hot water is produced.
႑Only the compressor is operational.
6. ”Add. heat only”
႑Compressor blocked. The function is activated by
pressing in the ”operating mode button” for 7
seconds.
7. Deactivate the function by pressing the "Operating
mode" button for 7 seconds once again.
* To use the cooling functions, the system must be de-
signed to withstand low temperatures and "Cooling" must
be activated in menu 9.3.3.
Changing the room temperature manually
If you want to temporarily or permanently increase or
lower the indoor temperature turn the ”Offset heating
curve” knob clockwise or anticlockwise. One line approx-
imately represents a 1 degree change in room temperat-
ure.
NOTE
An increase in the room temperature may be inhib-
ited by the radiator or underfloor heating thermo-
stats, if so these must be turned up.
7NIBE™ SPLIT
For Home Owners
Comfort setting heating

Default setting
The basic heating is set using menu 2.1.2 and with the
“Heating curve offset” knob.
If the required room temperature is not obtained, readjust-
ment may be necessary.
If you do not know the correct settings use the basic data
from the automatic heating control system diagram op-
posite.
Offset heating curve
Heating curve
2.1.2
9
Menu 2.1.2 Heating curve
NOTE
Wait one day between settings so that the temperat-
ures have time to stabilise.
Setting with diagrams
The diagram is based on the dimensioned outdoor tem-
perature in the area and the dimensioned flow temperat-
ure of the climate system. When these two values “meet”,
the heating control's curve coefficient can be read. This is
set under menu 2.1.2, "Heating curve". Limitations, which
are not in the diagrams, are included in the control sys-
tem's permitted min and max temperatures.
15 14 13 12 11 10
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UTETEMPERATUR
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NIBE™ SPLIT8
For Home Owners
Comfort setting heating

Readjusting the default settings
If the required room temperature is not obtained, readjust-
ment may be necessary.
Cold weather conditions
႑When the room temperature is too low, the “Heating
curve” value is increased in menu 2.1.2 by one increment.
႑When the room temperature is too high, the “Heating
curve” value is decreased in menu 2.1.2 by one incre-
ment.
Warm weather conditions
႑If the room temperature is low, increase the “Heating
curve offset” setting by one step clockwise.
႑If the room temperature is high, reduce the “Heating
curve offset” setting by one step anti-clockwise.
9NIBE™ SPLIT
For Home Owners
Comfort setting heating

Comfort setting cooling
General
The condition in order for cooling to be activated is that
"On" is selected in menu 9.3.3 Cooling system.
NOTE
The climate system must manage cooling operation.
Settings must be made by the installer when commis-
sioning the system.
If a room sensor is connected, it starts and stops cooling
together with the outdoor temperature. The lowest calcu-
lated supply temperature is set in menu 2.2.4.
Cooling operated from the outdoor sensor in
operating mode AutoK
If the cooling system is set to "On" in menu 9.3.3 and the
outdoor temperature is greater or equivalent to the set
start temperature for cooling in menu 8.2.4, cooling starts.
Cooling stops when the outdoor temperature drops below
the set value minus the set value in menu 8.2.5.
The calculated flow line temperature is determined from
the selected cooling curve in menu 2.2.2 and the offset
for cooling curve, menu 2.2.1. Limitations, which are not
in the diagram, are included in the control system's permit-
ted min temperature.
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20 °C
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20
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Controlling cooling mode using the room
sensor
If RG 10 is present, the condition for cooling is that the
room temperature has exceeded the set room temperature
(menu 6.3) by the set value in menu 8.2.5 and that the
outdoor temperature is equivalent to or exceeds the set
outdoor temperature value (menu 8.2.4).
When the room temperature has dropped below the set
room temperature in menu 6.3 by the set value in menu
8.2.5 or the outdoor temperature falls below the set value
in menu 8.2.4 by the set value in menu 8.2.5, cooling
switches off.
NIBE™ SPLIT10
For Home Owners
Comfort setting cooling

Comfort setting hot water
The integrated water heater is of coil model and is heated
by circulating water, which is heated by the heat pump.
During “normal” consumption it is enough to run the heat
pump’s compressor to supply the different tapping points
of the house with hot water. The temperature of the hot
water in the water heater then varies between the set
values.
Under section 1.0 [N] Hot water temp. on page 45 there
is a complete description of menu settings for hot water
temperatures.
Available volume (ACVM 270 with AMS 10-8)
8 l/min
12 l/min
16 l/min
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Available volume (ACVM 270 with AMS 10-12)
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200
300
400
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Prioritizing
If the water within the water heater requires heating, the
heat pump prioritises this and shifts to hot water mode
with the entire heat pump output.
In this mode, there is no heating or cooling.
Prioritizing can be affected via settings in the front panel.
See "1.0 [N] Hot water temp." on page 45.
Extra Hot Water
In all ”Extra hot water” functions, the temperature of the
hot water increases temporarily. The temperature is first
increased to an adjustable level by the compressor (menu
1.5) and then the electrical addition increases until the
stop temperature is reached (menu 1.4).
Temporary ”Extra hot water” is activated manually, whilst
time based extra hot water is activated using the settings
made in the control computer.
When:
႑”A” appears above the icon, temporary extra hot
water is active.
႑”B” appears above the icon, time based extra hot
water is active.
NOTE
”Extra hot water” usually means that the electrical
addition has been activated and therefore increases
the electrical consumption.
”Extra hot water” can be activated in three different
ways:
1. Periodic time based extra hot water
႑Interval between increases selected in menu 1.7.
Menu 1.8 shows when the next increase is due.
႑The increased temperature is maintained by the
electrical addition for one hour.
2. Schedule time based extra hot water
႑The start and stop times for the day of the week that
the increase is required are set in the sub menus to
menu 7.4.0.
႑The increased temperature is maintained by the
electrical addition for the selected period.
3. Temporary extra hot water
႑The current ”extra hot water” mode is shown on the
display (A) when the button is pressed and when
you continue to press the button the mode changes
between 3 hours and standby mode.
႑The increased temperature is maintained by the
electrical addition until the period of time has ex-
pired.
11NIBE™ SPLIT
For Home Owners
Comfort setting hot water

Maintenance
ACVM 270 and AMS 10 require minimal maintenance after
commissioning.
NIBE SPLIT contains many components and is why monit-
oring functions are integrated to help you.
If something abnormal occurs, a message appears about
malfunctions in the form of different ”alarm” texts in dis-
play.
Checking the safety valves in ACVM 270
ACVM 270 has been equipped with a safety valve for the
water heater as well as a safety valve for the climate system
by the installer.
The climate system's safety valve
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The climate system's safety valve (FL2) must be completely
sealed. Checks must be carried out regularly as follows:
႑Open the valve.
႑Check that water flows through the valve. If this does
not happen, replace the safety valve.
႑Close the valve again.
႑The climate system may need to be refilled after checking
the safety valve, see the section “Filling the climate sys-
tem”. Contact your installer for refilling the climate sys-
tem.
Hot water heater safety valve
The water heater's safety valve sometimes releases a little
water after hot water usage. This is because the cold water,
which enters the heater to replace the hot water, expands
when heated causing the pressure to rise and the safety
valve to open.
Also check the water heater safety valve regularly. The
appearance and location of the safety valve differs
between different installations. Follow the cold water pipe
to locate the safety valve. Contact your installer for inform-
ation.
Pressure gauge in ACVM 270
The working range of the climate system is normally 0.5 –
1.5 bar when the system is closed. Check this on the pres-
sure gauge (BP5).
Emptying the hot water heater
The water heater is of the coil type and is drained using
the siphon principle. This can be done either via the drain
valve on the incoming cold water pipe or by inserting a
hose into the cold water connection. See page 17.
Emptying the vessel
Contact your installer if the vessel in ACVM 270 needs
emptying.
Maintenance of AMS 10
AMS 10 is equipped with control and monitoring equip-
ment, however some exterior maintenance is still neces-
sary.
Make regular checks throughout the year that the inlet
grille is not clogged by leaves, snow or anything else.
During the cold months of the year, check to make sure
that there isn't a build up of ice or frost under AMS 10.
Strong wind combined with heavy snowfall can block the
intake and exhaust air grilles. Make sure that there is no
snow on the grilles.
Also check that the condensation water drain under AMS
10 is not blocked.
If necessary the outer casing can be cleaned using a damp
cloth. Care must be exercised so that the heat pump is not
scratched when cleaning. Avoid spraying water into the
grilles or the sides so that water penetrates into AMS 10.
Prevent AMS 10 coming into contact with alkaline cleaning
agents.
!WARNING!
Rotating fan in AMS 10.
Saving tips
Your NIBE SPLIT installation produces heat and hot water
according to your needs. It also attempts to carry out all
requirements with all available ”aids” from the control
settings made.
The indoor temperature is naturally affected by the energy
consumption. Therefore, take care not to set a temperature
higher than necessary.
Other known factors that affect the energy consumption
are, for example, hot water consumption and the insula-
tion level of the house, as well as the level of comfort you
require.
Also remember:
႑Open the thermostat valves completely (except in the
rooms that are to be kept cooler for various reasons, e.g.
bedrooms).
Thermostat valves in the radiators and floor loops can
negatively affect the energy consumption. They slow the
flow in the climate system, which the heat pump wants to
compensate with increased temperatures. It then works
harder and consumes more electrical energy.
NIBE™ SPLIT12
For Home Owners
Maintenance

Dealing with comfort disruption
Use the following list to find and remedy any heating or
hot water problems.
ActionCauseSymptom
Check and replace blown fuses.Circuit or main miniature circuit breaker
(MCB) tripped.
Low hot water temperature or a lack of hot
water.
Check and replace any blown circuit and
main fuses.
Heat pump and immersion heater do not
heat.
Reset the earth circuit-breaker, if the earth
circuit-breaker trips repeatedly, call an
electrician.
Possible earth circuit-breaker tripped.
Set the switch to 1.Switch (SF1) set to mode 0.
Wait a few hours and check if the hot water
temperature rises.
Large hot water demand.
Adjust the start temperature setting in
menu 1.2.
Too low start temperature setting on the
control system.
Reset the earth circuit-breaker, if the earth
circuit-breaker trips repeatedly, call an
electrician.
Possible earth circuit-breaker tripped.Low room temperature.
Check and replace any blown circuit and
main fuses.
Heat pump and immersion heater do not
heat.
Adjust the setting.Incorrect setting of "Curve slope", "Heating
curve, offset" and/or "Cooling curve, off-
set".
Check and replace blown fuses.Circuit or main miniature circuit breaker
(MCB) tripped.
Change operating mode to ”Auto” or "Au-
toK".
Heat pump in incorrect operating mode
”Hot water” or "Cooling".
Switch off one/several of the power con-
sumers.
The current limiter has restricted the cur-
rent because many power consumers are
being used in the property.
Adjust the setting.Incorrect setting of "Curve slope", "Heating
curve, offset" and/or "Cooling curve, off-
set".
High room temperature.
Change operating mode to ”AutoK”.Heat pump in incorrect operating mode.
Adjust the settings. Check menu 2.2.1, 2.2.2
and 8.2.4.
Incorrect settings for cooling.
Wait 30 minutes and check if the com-
pressor starts.
Minimum time between compressor starts,
alternatively time after power switch on
not achieved.
The compressor does not start.
See section ”Alarms”.Alarm tripped.
Activate operating mode ”Only additional
heat”.
Alarm cannot be reset.
Check and replace any blown circuit and
main fuses.
Display not lit.
Check that the circuit breaker to the indoor
unit is not off.
Check that the switch (SF1) is in normal
position (1).
13NIBE™ SPLIT
For Home Owners
Dealing with comfort disruption

Operating mode "Add. heat only"
In the event of malfunctions that cause a low indoor tem-
perature, you can normally activate "Add. heat only" in
ACVM 270, which means that heating only occurs with
the immersion heater.
Activate the mode by holding in the operating mode
button for 7 seconds.
Note that this is only a temporary solution, as heating with
the immersion heater does not make any savings.
Deactivate the function by pressing the "Operating mode"
button for 7 seconds once again.
Emergency mode
Emergency mode is activated by setting the switch to ”
”. It is used when the control system and thereby op-
erating mode "Add. heat only" do not function as they
should. Emergency mode is activated by setting switch
(SF1) to ” ”.
The following applies in emergency mode:
႑The front panel is not lit and the control computer in
ACVM 270 is not connected.
႑AMS 10 is off and only the circulation pump and immer-
sion heater in ACVM 270 are active.
႑An electrical step of 4 kW is connected. The immersion
heater is controlled by a separate thermostat (BT30).
႑The automatic heating control system is not operational,
so manual shunt operation is required. Call installer.
NIBE™ SPLIT14
For Home Owners
Dealing with comfort disruption

Alarm indications
There are many monitoring functions integrated in NIBE
SPLIT to alert you to any malfunctions, the control com-
puter transmits alarm signals that can be read from the
front panel display.
What happens in the event of an alarm?
႑The background lighting in the display starts flashing
and the status lamp lights red.
႑Compressor alarms and outdoor sensor errors change
the operating mode to ”Anti freeze” and reduce the
supply temperature to the minimum permitted temper-
ature to notify you that something is wrong.
Different types of alarms
႑Alarms with automatic reset (do not need to be acknow-
ledged when the cause has disappeared).
႑Existing alarms that require corrective action by you or
the installer.
႑A complete list of alarms is on page 57.
Recommended actions
1. Read off which alarm has occurred from the heat
pump's display.
2. As a customer you can rectify certain alarms. See the
table below for relevant actions. If the alarm is not
rectified, or is not included in the table, contact your
installer.
Check/remedy before installers/service
technicians are called
Alarm descriptionAlarm text on the display
Check that the thermostats for the radiat-
ors/under-floor heating systems are not
closed (only during cooling operation).
Tripped low pressure pressostat.LP-LARM
Check that the thermostats for the radiat-
ors/under-floor systems are not closed.
Tripped high pressure pressostat.HP-LARM
If cooling is in progress: Check that the air
flow to AMS 10 is not obstructed.
Check that any circuit breakers to the out-
door unit are not off.
Outdoor unit not powered / Communica-
tion cut
OU power failure / OU Com. error
Check and replace any blown circuit and
main fuses.
Display not lit.
Check that the circuit breaker to the indoor
unit is not off.
Check that the switch (SF1) is in normal
position (1).
Acknowledging alarms
No harm in acknowledging an alarm. If the cause of the
alarm remains, the alarm recurs.
႑When an alarm has been triggered, it can be acknow-
ledged by switching ACVM 270 off and on using the
switch (SF1). Note that when the power is switched on
there is a 30 minute delay before the heat pump restarts.
Alternatively, the alarm can be acknowledged in menu
9.7 (service menu).
႑When the alarm cannot be reset using the switch (SF1),
the operating mode, "Add. heat only", can be activated
to resume a normal temperature level in the house.
This is most easily carried out by holding the ”Operating
mode” button in for 7 seconds.
႑Deactivate the function by pressing the "Operating
mode" button for 7 seconds once again.
NOTE
Recurring alarms mean that there is a fault in the in-
stallation.
Contact your installer!
15NIBE™ SPLIT
For Home Owners
Alarm indications

General information for the installer
Transport and storage
Outdoor module AMS 10
AMS 10 should be transported and stored vertically.
If the heat pump is to be lifted using lifting straps without
packaging, protect as illustrated.
The right-hand side of the heat pump (seen from the front)
is heavier.
Indoor module ACVM 270
ACVM 270 can be transported either vertically or horizont-
ally. However it must be stored vertically and in dry condi-
tions.
Supplied components
Straps for 1 phase connectionOutside sensor
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Safety valve with manometerCurrent sensor, 3 phase
Cable tiesStraight connection to safety
valve
The enclosed kit is located behind the front service cover
in ACVM 270.
Assembly
Outdoor module AMS 10
Position AMS 10 outdoors secured to a firm surface,
preferably concrete foundation with ground stand near
walls or wall mounting.
It must be positioned so that the lower edge of the evap-
orator is at the level of the average local snow depth, al-
though a minimum of 200 mm. AMS 10 should not be
positioned next to noise sensitive walls, for example, next
to a bedroom. Also ensure that the placement does not
inconvenience the neighbours. Care must be exercised so
that the heat pump is not scratched during installation.
Large amounts of condensation water as well as melt
water from defrosting can be produced. Provide good
drainage at the installation area and make sure water
cannot run out onto paths or the like during periods that
ice can form.
The distance between AMS 10 and the house wall must
be at least 150 mm. Ensure that there is at least one metre
free space above AMS 10. AMS 10 must not be placed
so that recirculation of outdoor air can occur. AMS 10
must not be placed in a windy location where it is ex-
posed to direct strong winds. This causes lower output
and impaired efficiency and it also negatively affects
the defrosting function.
For wall installation, ensure that vibrations do not affect
the inside of the house. Also ensure that the wall and
mounting can take the weight of the heat pump.
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150 mm
300 mm
300 mm
5 m
NIBE™ SPLIT16
For the Installer
General information for the installer

Indoor module ACVM 270
႑It is recommended that ACVM 270 is installed in a room
with existing floor drainage, most suitably in a utility
room or boiler room.
႑The surface must be firm, preferably a concrete floor or
foundation.
႑Install ACVM 270 with its back to an outside wall, ideally
in a room where noise does not matter. If this is not
possible, avoid placing it against a wall behind a bed-
room or other room where noise may be a problem.
႑The unit can be aligned using the adjustable feet.
႑Route pipes so they are not fixed to an internal wall that
backs on to a bedroom or living room.
႑Ensure that there is approx. 500 mm free space in front
of and 220 mm above the product for any future service.
Dimensioning expansion vessel
Internal volume in ACVM 270 for calculating expansion
vessel is 280 l. The expansion vessel's volume must be at
least 5 % of the total volume.
Example table
Volume Expansion vessel (l)Total volume (l)
14280
16320
18360
Initial pressure and max height difference
The initial pressure of the pressure expansion vessel must
be dimensioned according to the maximum height (H)
between the vessel and the highest positioned radiator,
see figure. An initial pressure of 0.5 bar (5 mvp) means a
maximum permitted height difference of 5 m.
If the standard initial pressure in the pressure vessel is not
high enough it can be increased by filling via the valve in
the expansion vessel. The expansion vessel's standard initial
pressure must be entered in the check list on page 34.
Any change in the initial pressure affects the ability of the
expansion vessel to handle the expansion of the water.
H
Manual shunting
When ACVM 270 is set to emergency mode, the heating
control system is not in operation, and manual shunt op-
eration is required.
1. Depress and lock the button on (QN11).
2. Turn the mixing valve to the desired position by hand.
Button
Knob
QN11
Emptying the vessel
The vessel in ACVM 270 is emptied by opening the valve
(QM1) and safety valve (FL2).
NOTE
When the vessel in ACVM 270 is emptied via the valve
(QM1), some water will remain in the coil and in the
heat exchanger.
This means that there is a risk of the heat exchanger,
pipes and valves freezing at low temperatures as well
as a hygienic risk for the coil in the hot water section.
40
Recommended installation order
1. Connect ACVM 270 to the climate system, cold and
hot water lines as well as any external heat sources.
See page 18. Also see docking descriptions on page
22 and further on.
2. Install the refrigerant pipes according to the descrip-
tion on page 19.
3. Connect the load monitor, outdoor temperature
sensor, any centralised load control and external con-
tacts as well as the cable between ACVM 270 and AMS
10. See page 28.
4. Connect supply to ACVM 270. See page 27.
5. Follow the commissioning instructions on page 32.
17NIBE™ SPLIT
For the Installer
General information for the installer

Pipe installation
General
Pipe installation must be carried out in accordance with
current norms and directives. ACVM 270 can work at a
temperature up to 65 °C. For good savings we recommend
that the climate system is dimensioned for max 55 롑.
ACVM 270 is not equipped with shut-off valves. These
must be installed outside the indoor module to facilitate
any future servicing.
ACVM 270 can be connected to the radiator system, floor
heating system and/or fan convectors.
Install the supplied safety valve and manometer.
Overflow valve
NOTE
A free flow is required for all docking options, which
means that an overflow valve must be installed.
System requirements
This is required for minimum configuration:
For correct function the volume of the climate system must
meet the installation requirements, see page 22. If this is
not fulfilled a volume vessel needs to be installed. (NIBE
UKV).
For more options, see the docking description on page 22.
Dimensions and pipe connections
32 32
55 95 65 52 185
40 (42)
660
30
60
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Climate system, flow Ø 22 mmXL1
Climate system, return Ø 22 mmXL2
Cold water, Ø 22 mmXL3
Hot water, Ø 22 mmXL4
Liquid line refrigerant, flare 3/8''XL13
Gas line refrigerant, flare 5/8"XL14
Connection safety valve, manometerXL15
Pump capacity diagram
0
10
20
30
40
50
60
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The diagram shows max. performance. This can be restric-
ted in menu 2.0.
Connection of extra circulation pump
When connecting additional circulation pump GP10, to
achieve a higher flow capacity, see alternative "Underfloor
heating systems" on page 24. Respective maximum flows
must not be exceeded.
Connecting the climate system
Pipe connections for the climate system are made at the
top.
႑All required safety devices and shut-off valves must be
fitted as close to ACVM 270 as possible.
႑Install the bleed valves where necessary.
႑The safety valve (FL2) must be installed on (XL15) as illus-
trated. The entire length of the overflow water pipe from
the safety valves must be inclined to prevent water
pockets and must also be frost proof.
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႑When connecting to a system with thermostats on all
radiators, an overflow valve must be fitted, or some of
the thermostats must be removed to ensure sufficient
flow.
႑See section Dockings on page 22 for outline diagram.
NOTE
The term "Climate system" which is used in these in-
stallation and maintenance instructions regards
heating or cooling systems that are supplied with hot
or cold water from ACVM 270 for heating or cooling.
NIBE™ SPLIT18
For the Installer
Pipe installation