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

AA4

AA6

QA10

QA1

QA2

QA3

UB4

BP4

QM60 QM24

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

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

Table of contents

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