Nibe SPLIT ACVM270 User manual

Service manual
LEK
NIBE SPLIT ACVM270
Air/water heat pump
TEM EN 1740-1
431564

Table of Contents
41 Important information
4Document information
4Safety information
52 The heat pump design
5Component positions
73 System description
7General
21Sensor placement
224 Component description
22NIBE SPLIT ACVM270
315 Troubleshooting
31Alarm list
34Troubleshooting guide
54Troubleshooting circulation pumps
55Function check, components
576 Component replacement
57Removing the covers
587 Technical data
58Temperature sensor data
59Dimensions
60Technical specifications
61Item register
3Table of Contents |NIBE SPLIT ACVM270

Document information
This technical manual is a complement to the Installer
handbook for NIBE SPLIT ACVM270, containing:
■Component description.
■Information to facilitate fault-tracing.
■Instructions for replacing components.
■Supplementary technical information.
Safety information
This manual describes installation and service procedures
for implementation by specialists.
This appliance can be used by children
aged from 8 years and above and per-
sons with reduced physical, sensory or
mental capabilities or lack of experience
and knowledge if they have been given
supervision or instruction concerning use
of the appliance in a safe way and under-
stand the hazards involved. Children shall
not play with the appliance. Cleaning
and user maintenance shall not be made
by children without supervision.
Rights to make any design or technical
modifications are reserved.
©NIBE 2017.
Symbols
NOTE
This symbol indicates danger to person or ma-
chine .
Caution
This symbol indicates important information
about what you should observe when maintain-
ing your installation.
TIP
This symbol indicates tips on how to facilitate
using the product.
Serial number
You can find the serial number under the front cover at
the bottom left.
For removal of covers, see page 57.
LEK
Serial number
Silhouette line, 0.5 total, 0.2
white
Caution
You need the product's (14 digit) serial number
for servicing and support.
NIBE SPLIT ACVM270Chapter 1 | Important information4
1 Important information

Component positions
LEK
GP1
SF1
FA2
FA1
BT30
FD1
EB1
QM30
QM31
QN11
AA22
AA21
AA23
AA22-R24
AA22-R25
AA22-R26
BT6
BT19
XL4 XL3 XL2 XL1 XL15 XL13 XL14
UB1
UB2
EP2
QM20
PF4 PF1
XL8
XL9
HQ1
QM1
BT24
PF3
X1
X2
X3
AA4
AA6
QA10
QA1
QA2
QA3
UB4
BP4
QM60 QM24
X1
BF1
BT67 BT66
BT15
HZ2
QM32
5Chapter 2 | The heat pump designNIBE SPLIT ACVM270
2 The heat pump design

List of components
Pipe connections
Climate system supplyXL1
Climate system returnXL2
Cold waterXL3
Hot waterXL4
Docking inXL8
Docking outXL9
Liquid line refrigerantXL13
Gas line refrigerantXL14
Connection safety valve, manometerXL15
Valves etc.
Heat exchangerEP2
Circulation pump, climate systemGP1
Particle filterHQ1
Drying filterHZ2
Valve, draining/filling climate systemQM1
Venting valveQM20
Venting valveQM24
Venting valveQM60
Actuator, shuttle valve, hot waterQM30
Actuator reversing valve, climate system supplyQM31
Shut off valve, climate system returnQM32
Actuator, mixing valveQN11
Electrical components
Terminal block, incoming mains supplyX1
Terminal block, outgoing supply and communica-
tion
X2
Terminal block, external additionX3
SwitchSF1
Miniature circuit breaker, control systemFA1
Miniature circuit breaker, outdoor unitFA2
Immersion heaterEB1
Display unitAA4
Relay cardAA6
CPU cardAA21
EBV cardAA22
R24 Setting, fuse size
R25 Setting, max power, electric additional heat
R26 Setting, max boiler temperature
Communication boardAA23
ContactorQA1
ContactorQA2
ContactorQA3
ContactorQA10
Sensor, thermostats
Pressure sensor, high pressureBP4
Temperature sensor, HW chargingBT6
Temperature sensor, condenser outBT12
Temperature sensor, fluid pipeBT15
Temperature sensor, immersion heaterBT19
Temperature sensor, dockingBT24
Thermostat, standby modeBT30
Temperature limiterFD1
Miscellaneous
Cable glandUB1
Cable glandUB2
Cable glandUB4
Rating platePF1
Serial number platePF3
Sign, pipe connectionsPF4
Component location according to IEC 62400.
NIBE SPLIT ACVM270Chapter 2 | The heat pump design6

General
Installation requirements
AMS 10-12AMS 10-8
0.25 MPa (2.5 Bar)Max pressure, climate system
55/45 °CHighest recommended supply/return temperature at dimensioned
outdoor temperature
+65 °CMax temperature in NIBE SPLIT ACVM270
+58 °CMax flow line temperature with compressor
+7 °CMin supply temperature cooling
+25 °CMax supply temp. cooling
12 m30 mMax pipe length, refrigerant pipe
80 l50 lMin volume, climate system during heating, cooling*
100 l80 lMin volume, climate system during under floor cooling*
0.57 l/s0.38 l/sMax flow, climate system
0.29 l/s0.19 l/sMin flow, climate system, 100 % circulation pump speed (defrosting
flow)
0.15 l/s0.12 l/sMin flow, heating system
0.20 l/s0.16 l/sMin flow, cooling system
NIBE SPLIT ACVM270Docking external addition
9–18 kWOutput external addition
0.17–0.22 l/sRecommended docking flow
+65 °CMax temperature from external heat source
* Regards circulating volume
External circulation pump must be used when the pressure drop in the system is greater than the available external
pressure. In such cases, a bypass line with non-return valve must be installed.
Overflow valve must be used if min. system flow cannot be guaranteed.
7Chapter 3 | System descriptionNIBE SPLIT ACVM270
3 System description

Explanation
External
Shunt valveQN11
Shuttle valveQN12
Non-return valveRM
Expansion vesselCM1
Shunt group 2EP21
Circulation pumpGP10
External controlKF
Flow indicatorPG1
Room sensor RG 10 (accessory)RG10
Room unit RE 10 (accessory)RE10
Buffer vessel UKV (accessory)CP1
Safety valveFL1
Mixing valveFQ1
NIBE SPLIT ACVM270
Temperature sensor, outdoor (external)BT1
Temperature sensor, flow pipeBT2
Temperature sensor, returnBT3
Temperature sensor, hot waterBT6
Temperature sensor, condenser outBT12
Temperature sensor, fluid pipeBT15
Temperature sensor, immersion heaterBT19
Temperature sensor, external additionBT24
Thermostat, standby modeBT30
Temperature limiterFD1
High pressure transmitterBP4
Actuator, mixing valveQN11
Actuator, reversing valve, hot waterQM30
Actuator, reversing valve, climate systemQM31
Drying filterHS1
Immersion heaterEB1
Heat exchangerEP2
Circulation pump, climate systemGP1
Particle filterHQ1
Safety valveFL2
Pressure gaugeBP5
Cold water inCW
Hot water outHW
NIBE SPLIT ACVM270Chapter 3 | System description8

Radiators - only heating
Function
The heat pump prioritises hot water charging. The
compressor output is adjusted according to the outdoor
temperature. The charge pump varies the flow to main-
tain a high charge temperature.
When the water heater is full, the valves QM30 and
QM31 switch to the climate system. The heat pump is
then controlled by a calculated set point value on the
supply line. The compressor varies the output according
to the demand. The charge pump runs at a fixed set
speed.
If the compressor does not manage the entire heat de-
mand, the addition is connected and the heat shunted
out on the flow line.
Heating mode
ClosedQM30
OpenQM31
Active during balance point (A)QN11
Hot water mode
OpenQM30
ClosedQM31
Open (AB)QN11
Installation requirements
See page 7.
9Chapter 3 | System descriptionNIBE SPLIT ACVM270

Underfloor heating and cooling
Function
The heat pump prioritises hot water charging. The
compressor output is adjusted according to the outdoor
temperature. The charge pump varies the flow to main-
tain a high charge temperature.
When the water heater is full, the valves QM30 and
QM31 switch to the climate system. The heat pump is
then controlled by a calculated set point value on the
supply line. The compressor varies the output according
to the demand. The charge pump runs at a fixed set
speed.
If the compressor does not manage the entire heat de-
mand, the addition is connected and the heat shunted
out on the flow line.
In the event of a cooling demand, the heat pump is
controlled by a calculated set point value on the flow
line. The compressor varies the output according to the
demand. The charge pump runs at a fixed set speed.
Heating mode
ClosedQM30
OpenQM31
Active during balance point (A)QN11
Hot water mode
OpenQM30
ClosedQM31
Open (AB)QN11
Cooling mode
ClosedQM30
OpenQM31
Open (AB)QN11
Installation requirements
See page 7.
NIBE SPLIT ACVM270Chapter 3 | System description10

Fan convectors - heating and cooling
Function
The heat pump prioritises hot water charging. The
compressor output is adjusted according to the outdoor
temperature. The charge pump varies the flow to main-
tain a high charge temperature.
When the water heater is full, the valves QM30 and
QM31 switch to the climate system. The heat pump is
then controlled by a calculated set point value on the
supply line. The compressor varies the output according
to the demand. The charge pump runs at a fixed set
speed.
If the compressor does not manage the entire heat de-
mand, the addition is connected and the heat shunted
out on the flow line.
In the event of a cooling demand, the heat pump is
controlled by a calculated set point value on the flow
line. The compressor varies the output according to the
demand. The charge pump runs at a fixed set speed.
Heating mode
ClosedQM30
OpenQM31
Active during balance point (A)QN11
Hot water mode
OpenQM30
ClosedQM31
Open (AB)QN11
Cooling mode
ClosedQM30
OpenQM31
Open (AB)QN11
Installation requirements
See page 7.
11Chapter 3 | System descriptionNIBE SPLIT ACVM270

Dual system - heating and cooling
Function
The heat pump prioritises hot water charging. The
compressor output is adjusted according to the outdoor
temperature. The charge pump varies the flow to main-
tain a high charge temperature.
When the water heater is full, the valves QM30 and
QM31 switch to the climate system. The heat pump is
then controlled by a calculated set point value on the
supply line. The compressor varies the output according
to the demand. The charge pump runs at a fixed set
speed.
Extra shunt (EP21-QN11) lowers the temperature on
system 2 according to settings in NIBE SPLIT ACVM270.
If the compressor does not manage the entire heat de-
mand, the addition is connected and the heat shunted
out on the flow line.
During cooling demand valve QN12 shifts to the cooling
system. The heat pump is then controlled by a calculated
set point value on the flow line. The compressor varies
the output according to the demand. The charge pump
runs at a fixed set speed.
Heating mode
ClosedQM30
OpenQM31
Active during balance point (A)QN11
Open (A)QN12
Hot water mode
OpenQM30
ClosedQM31
Open (AB)QN11
NIBE SPLIT ACVM270Chapter 3 | System description12

Cooling mode
ClosedQM30
OpenQM31
Open (AB)QN11
Open (B)QN12
Installation requirements
See page 7.
13Chapter 3 | System descriptionNIBE SPLIT ACVM270

Underfloor heating and fan convectors-
heating and cooling
Function
The heat pump prioritises hot water charging. The
compressor output is adapted according to the outdoor
temperature. The charge pump varies the flow to main-
tain a high charge temperature.
When the water heater is full, the valves QM30 and
QM31 switch to the climate system. The heat pump is
then controlled by a calculated set point value on the
supply line. The compressor varies the output according
to the demand. The charge pump runs at a fixed set
speed.
Extra shunt (EP21-QN11) lowers the temperature on
system 2 according to settings in NIBE SPLIT ACVM270.
If the compressor does not manage the entire heat de-
mand, the addition is connected and the heat shunted
out on the flow line.
During cooling demand valve QN12 shifts to the cooling
system. The heat pump is then controlled by a calculated
set point value on the flow line. The compressor varies
the output according to the demand. The charge pump
runs at a fixed set speed.
Heating mode
ClosedQM30
OpenQM31
Active during balance point (A)QN11
Open (A)QN12
Hot water mode
OpenQM30
ClosedQM31
Open (AB)QN11
NIBE SPLIT ACVM270Chapter 3 | System description14

Cooling mode
ClosedQM30
OpenQM31
Open (AB)QN11
Open (B)QN12
Installation requirements
See page 7.
15Chapter 3 | System descriptionNIBE SPLIT ACVM270

External additional heat
Sun
NIBE ACVM
10-270
Function
By connecting a solar heat collector via intermediate heat exchanger to NIBE SPLIT ACVM270, the solar heat can
produce hot water and heating for the house.
If the solar panel does not produce the necessary heat, NIBE SPLIT ACVM270 with the compressor or with internal
immersion heater heats.
The solar panel must have an external charge automatic device (KF) as follows:
Max temperature 65 °C at BT24. P1 stops.
Min temperature 55 °C at T1 for P1 to start.
V1 must limit the temperature to 65 °C.
Accumulators and primary system design are dimensioned by the boiler supplier. Ensure that there is sufficient
volume to prevent overheating.
NIBE SPLIT ACVM270Chapter 3 | System description16

Gas
NIBE ACVM
10-270
Function
NIBE SPLIT ACVM270 activates additional heat when the compressor output is not sufficient for the house demand.
When the additional heat is activated, valves QM 30 and QM31 switch to the climate system. Valve QN11 shunts in
the event of a heating demand on the supply line. Hot water is produced with the additional heat.
Max temp 65°C out from the gas fired boiler.
Control signal for additional heat taken from terminal block X3.
Strap between X3:2-3 removed.
The addition's control phase is connected to terminal block X3:2 (230V), X3:4 (N) (max 0.4 A).
Menu 9.2.8 set to External Line 1.
Alt 1: The gas boiler runs continuously. NIBE SPLIT ACVM270 controls the circulation pump.
Alt 2: Condensing gas boiler with internal circulation pump. NIBE SPLIT ACVM270 provides the gas boiler with start
and stop signals.
17Chapter 3 | System descriptionNIBE SPLIT ACVM270

Oil
NIBE ACVM
10-270
Function
NIBE SPLIT ACVM270 activates additional heat when the compressor output is not sufficient for the house demand.
When the additional heat is activated, valves QM 30 and QM31 switch to the climate system. Valve QN11 shunts in
the event of a heating demand on the supply line. Hot water is produced with the additional heat.
Max temp 65°C out from the oil/pellet boiler.
Control signal for additional heat taken from terminal block X3.
Strap between X3:2-3 removed.
The addition's control phase is connected to terminal block X3:2 (230V), X3:4 (N) (max 0.4 A).
Menu 9.2.8 set to External Line 1.
The oil fired boiler is started and stopped by external control. NIBE SPLIT ACVM270 controls the circulation pump.
NIBE SPLIT ACVM270Chapter 3 | System description18

Wood
NIBE ACVM
10-270
Function
By connecting a wood-fired boiler via accumulator tank to NIBE SPLIT ACVM270, hot water and heat to the house
can be produced by it.
If there is no heat in the accumulator tank, heat and hot water are produced by the heat pump or by the internal
immersion heater according to the selected operating mode.
The wood installation must have an external charge automatic device (KF) as follows:
Max temperature 65 °C at BT24. P1 stops.
Min temperature 55 °C at T1 for P1 to start.
V1 must limit the temperature to 65 °C.
Accumulators and primary system design are dimensioned by the boiler supplier. Ensure that there is sufficient
volume to prevent overheating.
19Chapter 3 | System descriptionNIBE SPLIT ACVM270

F130
NIBE ACVM
10-270
F 130
Function
By connecting F130 to NIBE SPLIT ACVM270, it can produce hot water and heat to the house.
If the heat outlet from NIBE SPLIT ACVM270 exceeds F130’s output, heat and hot water are produced by the heat
pump or internal immersion heater according to the selected operating mode.
The particle filter (HQ) must have a max. of 0.8 mm2stitch density.
Max. temperature from F130 must be 65 °C.
Sensors 87 and 88 from F130 must be positioned in BT24.
Recommended settings:
ECO, 60-58 °C ΔT4K
Periodic hot water increase: Off
NIBE SPLIT ACVM270Chapter 3 | System description20