Nibe F1345 Series User manual

Service manual
LEK
F1345
Ground source heat pump
SEM GB 1714-2
431514

Table of Contents
31 Important information
3Document information
3Safety information
62 The heat pump design
113 System description
11Principle of operation
16System diagram
184 Cooling circuit
18Outline diagram
18Compressor protection
19Expansion valve
205 Component description
20Compressor (GQ10)
20Other components
23Sensors
23Electronics
266 Troubleshooting
26Alarm list
36Troubleshooting guide
44Function check, relays/components
467 Component replacement
46Basic
54Main components
61Circuit board and electronics
64Sensors
658 Technical data
65Technical specifications
68
9 Dimensions and setting-out coordin-
ates
69Item register
F1345Chapter |2

Document information
This technical manual is a complement to the Installer
handbook for F1345, containing:
■Description of functions and component description.
■Information to facilitate fault-tracing.
■Instructions for replacing components.
■Wiring diagram.
■Supplementary technical information.
The document applies to heat pumps with part no.:
065 29724 kW
065 29830 kW
065 29940 kW
065 30060 kW
The heat pump software version can be found in the info
menu (menu 3.1).
Safety information
This manual describes installation and service procedures
for implementation by specialists.
SEMKO text
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. The product
is intended for use by experts or trained
users in shops, hotels, light industry,
farming and similar environments.
Children must be instructed/supervised
to ensure that they do not play with the
appliance.
Do not allow children to clean or main-
tain the appliance unsupervised.
This is an original manual. It may not be
translated without the approval of NIBE.
We reserve the right to make design
modifications without prior notice.
©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.
3Chapter 1 | Important informationF1345
1 Important information

Marking
F1345 is CE marked and fulfils IP21.
The CE marking means that NIBE ensures that the
product meets all regulations that are placed on it based
on relevant EU directives. The CE mark is obligatory for
most products sold in the EU, regardless where they are
made.
IP21 means that objects with a diameter larger than or
equivalent to 12.5 mm cannot penetrate and cause
damage and that the product is protected against vertic-
ally falling drops of water.
Safety precautions
Caution
Install the system in full accordance with this installation
manual.
Incorrect installation can cause bursts, personal injury, water leaks,
refrigerant leaks, electric shocks and fire.
Observe the measurement values before working on the
cooling system, especially when installing in small rooms, so
that the limit for the refrigerant's density is not exceeded.
Consult an expert to interpret the measurement values. If the refri-
gerant density exceeds the limit, lack of oxygen can occur in the
event of any leak, which can cause serious accidents.
Use original accessories and the stated components for the
installation.
If parts other than those stated by us are used, water leaks, electric
shocks, fire and personal injury may occur as the unit may not work
properly.
Ventilate the working area well – refrigerant leakage may occur
during service work.
If the refrigerant comes into contact with naked flames, poisonous
gas is created.
Install the unit in a location with good support.
Unsuitable installation locations can cause the unit to fall and cause
material damage and personal injury. Installation without sufficient
support can also cause vibrations and noise.
Ensure that the unit is stable when installed, so that it can
withstand earthquakes and strong winds.
Unsuitable installation locations can cause the unit to fall and cause
material damage and personal injury.
The electrical installation must be carried out by a qualified
electrician and the system must be connected as a separate
circuit.
Power supply with insufficient capacity and incorrect function can
cause electric shocks and fire.
Use the stated cables for the electrical connection, tighten the
cables securely in the terminal blocks and relieve the wiring
correctly to prevent overloading the terminal blocks.
Loose connections or cable mountings can cause abnormal heat
production or fire.
Check, after completed installation or service, that no refriger-
ant leaks from the system in gas form.
If refrigerant gas leaks into the house and comes into contact with
an aerotemp, an oven or other hot surface, poisonous gases are
produced.
Use types of pipe and tools stated for this type of refrigerant.
Using existing parts for other refrigerants can cause breakdowns
and serious accidents due to process circuit bursts.
Switch off the compressor before opening/breaching the refri-
gerant circuit.
If the refrigerant circuit is breached /opened whilst the compressor
is running, air can enter the process circuit. This can cause unusually
high pressure in the process circuit, which can cause bursts and
personal injury.
Switch off the power supply in the event of a service or inspec-
tion.
If the power supply is not shut off, there is a risk of electric shocks
and damage due to the rotating fan.
Do not run the unit with removed panels or protection.
Touching rotating equipment, hot surfaces or high voltage parts
can cause personal injury due to entrapment, burns or electric
shocks.
Cut the power before starting electrical work.
Failure to cut the power can cause electric shocks, damage and in-
correct function of the equipment.
F1345Chapter 1 | Important information4

Care
Carry out the electrical installation with care.
Do not connect the ground lead to the gas line, water line, lightning
conductor or telephone line's ground lead. Incorrect grounding
can cause unit faults such as electric shocks due to short-circuiting.
Use main switch with sufficient breaking capacity.
If the switch does not have sufficient breaking capacity, malfunc-
tions and fire can occur.
Always use a fuse with the correct rating in the locations where
fuses are to be used.
Connecting the unit with copper wire or other metal thread can
cause unit breakdown and fire.
Cables must be routed so that they are not damaged by metal
edges or trapped by panels.
Incorrect installation can cause electric shocks, heat generation
and fire.
Do not install the unit in close proximity to locations where
leakage of combustible gases can occur.
If leaking gases collect around the unit, fire may occur.
Do not install the unit where corrosive gas (for example nitrous
fumes) or combustible gas or steam (for example thinner and
petroleum gases) can build up or collect, or where volatile
combustible substances are handled.
Corrosive gas can cause corrosion to the heat exchanger, breaks
in plastic parts etc. and combustible gas or steam can cause fire.
Do not use the unit for specialist purposes such as for storing
food, cooling precision instruments, freeze-conservation of
animals, plants or art.
This can damage the items.
Do not install and use the system close to equipment that
generates electromagnetic fields or high frequency harmonics.
Equipment such as inverters, standby sets, medical high frequency
equipment and telecommunications equipment can affect the unit
and cause malfunctions and breakdowns. The unit can also affect
medical equipment and telecommunications equipment, so that
it functions incorrectly or not at all.
Take care when carrying the unit by hand.
If the unit weights more than 20 kg, it must be carried by two
people. Use gloves to minimize the risk of cuts.
Dispose of any packaging material correctly.
Any remaining packaging material can cause personal injury as it
may contain nails and wood.
Do not touch any buttons with wet hands.
This can cause electric shocks.
Do not touch any refrigerant pipes with your hands when the
system is in operation.
During operation the pipes become extremely hot or extremely
cold, depending on the method of operation. This can cause burn
injuries or frost injuries.
Do not shut off the power supply immediately after operation
has start.
Wait at least 5 minutes, otherwise there is a risk of water leakage
or breakdown.
Do not control the system with the main switch.
This can cause fire or water leakage. In addition, the fan can start
unexpectedly, which can cause personal injury.
Especially for units intended for R407C and R410A
- Do not use other refrigerants that those intended for the unit.
- Do not use charging bottles. These types of bottles change the
composition of the refrigerant, which makes the performance of
the system worse.
- When filling refrigerant, the refrigerant must always leave the
bottle in liquid form.
- R410A means that the pressure is about 1.6 times as high as for
conventional refrigerants.
- The filling connections on units with R410A are different sizes, to
prevent the system being filled with the incorrect refrigerant by
mistake.
Serial number
The serial number can be found at the bottom right of
the front cover and in the info menu (menu 3.1) and on
the type plate (PF1).
Serial number
Caution
You need the product's ((14 digit) serial number
for servicing and support.
Recovery
Leave the disposal of the packaging to the in-
staller who installed the product or to special
waste stations.
Do not dispose of used products with normal
household waste. It must be disposed of at a
special waste station or dealer who provides this type of
service.
Improper disposal of the product by the user results in
administrative penalties in accordance with current legis-
lation.
Environmental information
The equipment contains R407C or R410A, fluorinated
greenhouse gases with GWP values (Global Warming
Potential) of 1774 and 2088 respectively. Do not release
R407C or R410A into the atmosphere.
5Chapter 1 | Important informationF1345

General
L1
-X3 -X4
123
-AA101 -AA101
NL2 L3 1 2 3456789
-X5 1 2 3456789
-X6
-X7 -X8 -X9
-FC1
-AA101 -AA101
-AA101 -AA101 -AA101
1 2 341 2 31 2 31 2 345
-X10
A B A B
-AA3-X7
K1
-AA101
K2 K3
C C NO NC
K4 CNO NC
QN10 GP16
LNL L L N N N LNLNPE
PE
6789 10 11 12 13 14 15 16 17 18 19 20 2122
12V
A B 13 14
-BE1
-GP16
-BE2
-BE3
AUX 4
AUX 5
1 2 3456789 10 11 12 13 14 15
-AA3
-X6
0-10V -EP14 -EP15
-BF1
16 17 18 2
-AA3
-X22 -AA3
-AA3
-X20 -X21 13123
-X23
-BT1
-BT50
-BT25
-BT6
AUX 1
AUX 2
AUX 3
-BT7
-BT71
2.0
AA101-X6
AA3-X23AA3-X21AA101-X9AA101-X7AA101-X5AA101-X3
AA101-X4 FC1 AA101-X8 AA101-X10 AA3-X6 AA3-X20 AA3-X22
AA101-XJ2
LEK
AA4
SF1
AA4-XJ4
AA4-XJ3
-XJ3
-XJ13
-XJ4
-XJ5
-XJ1
EP15
EP14
UB2
UB3
EP15-XL1
EP15-XL2
EP15-XL6
EP15-XL7
EP14-XL1
EP14-XL2
EP14-XL6
EP14-XL7
UB3
UB2
UB1
EP15-PF2
EP14-PF2
PF1
LEK
-XJ6
-AA101-X1
-AA101-X2
FC1 -AA101
-AA3
-AA27
-XJ10
-AA2
-XJ9
-AA26
-XJ11
-XJ7
-XJ8
F1345Chapter 2 | The heat pump design6
2 The heat pump design

Pipe connections
Connection, heating medium flowXL 1
Connection, heating medium returnXL 2
Connection, brine inXL 6
Connection, brine outXL 7
HVAC components
Cooling moduleEP 14
Cooling moduleEP 15
Sensors etc.
Outside sensorBT 1
Electrical components
Base card-AA 2
Input circuit board-AA 3
Terminal block, sensorAA3-X 6
Terminal block -EP14 -BP8AA3-X 20
Terminal block -EP15 -BP8AA3-X 21
Terminal block, flow meter -EP14 -BF1AA3-X 22
Terminal block, flow meter -EP15 -BF1AA3-X 23
Display unit-AA 4
-AA4-XJ3 USB outlet (no function)
-AA4-XJ4 Service outlet (No function)
Base card 2-AA 26
Relay board for base-AA 27
Interface boardAA101
Terminal block, incoming electrical supplyAA101-X 1
Terminal block, supply -EP14AA101-X 2
Terminal block, operating voltage out -X4AA101-X 3
Terminal block, operating voltage in (tariff
option)
AA101-X 4
Terminal block, supply, external accessories.AA101-X 5
Terminal block, -QN10 and -GP16AA101-X 6
Terminal block, step controlled or shunted
additional heat.
AA101-X 7
Emergency mode relayAA101-X 8
Alarm relay, AUX relayAA101-X 9
Communication, PWM, Power supplyAA101-X 10
Miniature circuit-breaker-FC 1
Switch on Display -AA4-SF 1
Connector, electrical supply to compressor,
cooling module -EP14
-XJ 1
Connector, electrical supply to compressor,
cooling module -EP15
AA101-XJ 2
Compressor heater -EP14-XJ 3
Connector, brine pump, cooling module
-EP14 (only 24 and 30 kW)
-XJ 4
Connector, heating medium pump, cooling
module -EP14
-XJ 5
Compressor heater-EP15-XJ 6
Connector, brine pump, cooling module
-EP15 (only 24 and 30 kW)
-XJ 7
Connector, heating medium pump, cooling
module -EP15
-XJ 8
Communication motor module -EP15-XJ 9
Communication motor module -EP14-XJ 10
Pumps, compressor heater -EP14-XJ 11
Communication motor module -EP14-XJ 13
Miscellaneous
Rating platePF 1
Type plate, cooling sectionPF 2
Serial number platePF 3
Cable gland, incoming electricityUB 1
Cable gland, powerUB 2
Cable gland, signalUB 3
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
7Chapter 2 | The heat pump designF1345

Electrical cabinets
F1345 24 kW, 3x400 V
LEK
LEK
FC1
AA10
Screws
Screws
F1345 30, 40 and 60 kW, 3x400 V
LEK
LEK
FC1
AA10
Screws
Screws
Electrical components
Soft-start cardAA 10
Miniature circuit-breakerFC 1
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
F1345Chapter 2 | The heat pump design8

Cooling section
F1345 24 and 30 kW, 3x400 V
LEK
AA100
BT10
BT11
QM2
BT12
GP2
GP1
BT3
QM1
X401
F1345 40 and 60 kW, 3x400 V
LEK
AA100
BT10
BT11
BT12
GP1
BT3
QM1
X401
QM2
LEK
F1345 24 kW, 3x400V
EP2
BT14
BT17
EP1
BP2
BT15
BP1
GQ10
HS1
XL21
QN1
EB10 XL20
BP8
LEK
F1345 30 kW, 3x400V
EP2
BT14
BP8
EP1
BP2
BT15
BP1
GQ10
HS1
XL21
QN1
EB10 XL20
BT17
BT29
LEK
F1345 40 kW, 3x400V
EP2
BT14
HS1
EP1
BT17
GQ10
XL21
BP1
BP8
XL20
QN1
EB10
BT15
BP2
BT29
LEK
F1345 60 kW, 3x400V
EP2
BT14
BP8
EP1
BT17
GQ10
XL21
BP1
HS1
XL20
QN1
EB10
BT15
BP2
BT29
9Chapter 2 | The heat pump designF1345

Pipe connections
Service connection, high pressureXL 20
Service connection, low pressureXL 21
HVAC components
Circulation pumpGP 1
Brine pumpGP 2
Drainage, climate systemQM 1
Draining, brine sideQM 2
Sensors etc.
High pressure pressostatBP 1
Low pressure pressostatBP 2
Sensor, low pressureBP 8
Temperature sensors, heating medium returnBT 3
Temperature sensor, brine inBT 10
Temperature sensor, brine outBT 11
Temperature sensor, condenser supply lineBT 12
Temperature sensor, hot gasBT 14
Temperature sensor, fluid pipeBT 15
Temperature sensor, suction gasBT 17
Temperature sensor, compressorBT 29
Electrical components
Joint cardAA 100
Compressor heaterEB 10
Joint connector, compressor and motor moduleX 401
Cooling components
EvaporatorEP 1
CondenserEP 2
CompressorGQ 10
Drying filterHS 1
Expansion valveQN 1
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
F1345Chapter 2 | The heat pump design10

Principle of operation
F1345 24 and 30 kW, 3x400 V
EP2
GP2
QM52
HQ15
GP1
XL1XL6
XL7 XL2
BT3 QM56
BT12
EP15
EP14
BT14BT17BP2
BP1QN1BT11
GQ10BP8
FL11
RM11
BT15
FL13
QM57
RM13
EP2GP2
QM50
HQ14
GP1
EP1
XL1
XL6
XL7 XL2
BT3 QM54
BT12BT14BT17BP2
BP1QN1
BT11
GQ10BP8
QM51
FL10
RM10
BT15
FL12
QM55
RM12
EP1
BT10
HQ13
QM53
BT10
HQ12
BT29*
BT29*
* Only on F1345 30 kW
11Chapter 3 | System descriptionF1345
3 System description

F1345 40-60 kW, 3x400V
EP15
EP14
GQ10BP2 BP8 EP1
GP16
QM50
XL7
QM53
XL6
HQ13
QN1BT11 BP1 BT15
XL2
QM56
QM57
RM13BT29 BT14
BT11 QN1 BP1 BT15 GP1 HQ14 QM54
XL1
FL12
XL2
EP2 BP8 GQ10 BT29 BT14 EP1 RM12
QM55
FL13
HQ15GP1
FL10
XL1
RM10
BT10 BP2
EP2BT10
List of components
The different components are on both EP14 and EP15.
Pipe connections
Connection, heating medium flowXL 1
Connection, heating medium returnXL 2
Connection, brine inXL 6
Connection, brine outXL 7
Cooling components
EvaporatorEP 1
CondenserEP 2
CompressorGQ 10
Drying filterHS1
Expansion valveQN 1
HVAC components
Cooling module BEP14
Cooling module AEP15
Circulation pumpGP1
Brine pumpGP2
Draining, Climate systemQM1
Draining, Brine systemQM2
Particle filterHQ12 - 15
Non-return valveRM10 - 13
Shut-off valve, Brine sideQM50 - 53
Shut-off valve, heating medium sideQM54 - 57
Safety valve, collector sideFL10 - 11
Safety valve, heating medium sideFL12 - 13
F1345Chapter 3 | System description12

Sensors etc.
Sensors connected internally
FunctionLocationName
Protects the compressor against pres-
sures that are too high.
On the liquid line.High pressure pressostatBP1
Protects the compressor against pres-
sures that are too low.
On suction gas line.Low pressure pressostatBP2
Controls preheating of compressor in
relation to BT29.
On suction gas line.Low pressure transmitterBP8
Set point values for heating and cooling
demand calculation. Operating mode
change.
Outdoor, shaded location on north side
of the house.
Outside sensorBT1*
Stopping the compressor at high temp.On return line between circulation
pump (GP1) and condenser (EP2).
Return pipeBT3
Start and stop of hot water charging.On accumulator tank lower section.Hot water, chargingBT6*
Display only.On accumulator tank top.Hot water, topBT7*
Stopping the compressor at high temp.On incoming brine, at 24 - 30 kW before
circulation pump (GP2) and on 40 -
60 kW after externally installed circula-
tion pump.
Brine inBT10
Stopping the compressor at low temp.On outgoing HTF after evaporator.Brine outBT11
Stopping the compressor at high temp.On the supply line after the condenser
((EP2).
Condenser flow lineBT12
Stopping the compressor at high temp.On hot gas line after the compressor
(GQ10)).
DischargeBT14
View.On the fluid line after the condenser
((EP2).
Fluid pipeBT15
View.On suction gas line before the com-
pressor (GQ10).
Suction gasBT17
Calculating DM for heating and cooling.On the heating system supply line.External flow lineBT25*
Controls preheating of compressor in
relation to BP8.
On the compressor.Oil temp.BT29**
Display of oil temperature during oper-
ation.
Correction of indoor temperature.In suitable indoor location.Room sensorBT50*
View.On the heating system return line.External return line sensorBT71*
* Externally mounted (not included in outline diagram).
** Not on 24 kW.
13Chapter 3 | System descriptionF1345

External
FunctionLocationName
Stop and start of pool charging.On pool water pipe in heat exchanger.Pool sensorCL11-BT51
In relation to BT54, stop and start of
solar charging.
On the solar panel.Solar panel tempEP30-BT53
In relation to BT53, stop and start of
solar charging.
On solar tank bottom.Solar tank, bottomEP30-BT54
Closes additional heat mixing valve
when boiler is cold.
In additional heat boiler.Boiler sensorEM1-BT52
Controls additional heat shunt at boiler
to give desired supply temperature.
Calculation of cooling DM.On supply line, cooling.Cooling dump sensorEQ1-BT57
Actual value for shunt valve cooling
(EQ1-QN18).
On supply line, cooling.Flow line, coolingEQ1-BT64
View.On return line, cooling.Return line, coolingEQ1-BT65
Actual value for cooling dumping.On collector in.Heating dump sensorEQ1-BT75
Actual value for mixing valve, climate
system 2.
On flow line to extra climate system 2.Flow line, extra climate
system
EP21-BT2
View.On return line from extra climate sys-
tem 2.
Return line, extra climate
system
EP21-BT3
Actual value for mixing valve, climate
system 3.
On flow line to extra climate system 3.Flow line, extra climate
system
EP22-BT2
View.On return line from extra climate sys-
tem 3.
Return line, extra climate
system
EP22-BT3
Actual value for mixing valve, climate
system 4.
On flow line to extra climate system 4.Flow line, extra climate
system
EP23-BT2
View.On return line from extra climate sys-
tem 4.
Return line, extra climate
system
EP23-BT3
View.In exhaust air in FLM.Exhaust airAZ1-BT20
Controls defrostingIn extract air in FLM.Extract airAZ1-BT21
View.On incoming collector line in FLM.Collector inAZ1-BT26
View.On outgoing collector line in FLM.Collector outAZ1-BT27
View.In exhaust air.Exhaust airAZ2-BT20
Controls defrostingIn extract air.Extract airAZ2-BT21
View.On incoming collector line.Collector inAZ2-BT26
View.On outgoing collector line.Collector outAZ2-BT27
View.In exhaust air.Exhaust airAZ3-BT20
Controls defrostingIn extract air.Extract airAZ3-BT21
View.On incoming collector line.Collector inAZ3-BT26
F1345Chapter 3 | System description14

FunctionLocationName
View.On outgoing collector line.Collector outAZ3-BT27
View.In exhaust air.Exhaust airAZ4-BT20
Controls defrostingIn extract air.Extract airAZ4-BT21
View.On incoming collector line.Collector inAZ4-BT26
View.On outgoing collector line.Collector outAZ4-BT27
Actual value for mixer valve.On outgoing HWC pipe.Outgoing hot waterQZ1-BT70
Only display.On HWC return.HWC ReturnEQ1-BT82
Only display.On top of additional water heater.Water heaterEQ1-BT83
15Chapter 3 | System descriptionF1345

System diagram
Heating
This is an example of an outline diagram. Actual installation must be project planned according to applicable norms!
NOTE
Components within the hatched area designated -EB100 or - EB1 all have -EB100 or - EB1 as suffix. For ex-
ample -EB100-RM13.
-BT6
-CP10
-EP12
-CM3
P
-BP6 -QM21 -FL3
-XL28-XL27
-QM33
-FL2
-CM1
-QM11 -QM20
-QM34
-EB100-BT25
-EB100-BT71
-FL12
-FL11
-FL13
-FL14
-QM54
-QM55
-QM56
-QM57
-QM50
-QM51
-QM52
-QM53
-RM11
-RM10
-BT1
-EB100
-EB100
-EP15
-EP14
-HQ15
-HQ14
-RM12
-RM13
-HQ13
-HQ12
-EB100
-CM5
-FL10
-QM42
-QM43
-EB1
-EB1
-EB2
-XD1
-RN11
-QN10
-EB100
-GP10
-KA1
-AA25
-RM42
Function
The heat pump (EB100) prioritises charging of hot water with half the power (cooling module EP14) via a reversing
valve (QN10). When the water heater/accumulator tank (CP10) are fully charged (QN10) switches to the heating
circuit. When there is a heating demand, cooling module (EP15) starts first. For greater demands, cooling module
(EP14) also starts for heating operation.
Additional heat (EB1) is connected automatically when the energy demand exceeds the heat pump capacity.
If the water heater/accumulator tank (CP10) is fitted with an immersion heater (IU) and a junction box (K11) the
"temporary lux" function can be used. A contactor is required.
TIP
Refer to the Installer manual for description of
possible docking alternatives.
F1345Chapter 3 | System description16

Installation requirements
Heating medium side
60 kW40 kW30 kW24 kW
6BarMax system pressure
900600450360lMin recommended volume heating system*
0.920.640.500.37l/sMin flow**
1.340.930.730.54l/sNominal flow
1.741.200.950.70l/sMax recommended flow
50707278kPaMax external available pressure at nominal flow***
See diagram page 67.°CMin/max temperature
* min volume refers to circulating flow
** overflow valve must be used if min flow cannot be guaranteed
*** external circulation pump must be used when the pressure drop in the system is greater than the available ex-
ternal pressure. In such cases, a bypass line with non-return valve must be installed.
Brine side
60 kW40 kW30 kW24 kW
6BarMax system pressure
2.361.591.230.92l/sMin flow
3.102.091.621.18l/sNominal flow
78927595kPaMax external available pressure at nominal flow
See diagram page 67.°CMax/min incoming temperature
-12 / -14°CMin. outgoing brine temperature without/with AMB 30
17Chapter 3 | System descriptionF1345

Outline diagram
Köld-
bärare
Bulb
LP LP
HP
Förångare
Kompressor
Högtrycks-
pressostat
Vätske-
ledningsgivare
Hetgasgivare
Lågtrycks-
pressostat
Lågtrycks-
givare
Suggas-
givare
Exp.-
ventil
Tork-
filter
Kondensor
Värme-
bärare
Bulb
Low pressure
switch
Low
pressure
sensor
Suction gas
sensor
High pressure
switch
Fluid line sensor
Drier
filter
Hot gas sensor
Condenser
Evaporator
Brine Heating
medium
Exp.
valve
Compressor
Compressor protection
Hot gas temperature
Stop with automatic restart:
■The compressor stops when the temperature exceeds
135 °C in 20 min.
■The compressor stops immediately when the temper-
ature is above 150 °°C.
Stop with manual restart:
■The above has occurred 3 times within 240 minutes.
High pressure pressostat
Stop with manual restart:
RestartStopCompressor
25 bar32 bar24 - 40 kW
35 bar42 bar60 kW
Low pressure pressostat
Stop with manual restart:
RestartStopCompressor
1.5 bar0.8 bar24 - 40 kW
2.7 bar2.0 bar60 kW
Low pressure transmitter
30 - 60kW:
Blocking with automatic restart:
■The compressor is blocked for up to 30 minutes at re-
start or until BT29 is at least 10 °C above the low
pressure sensor temperature.
Stop with manual restart:
RestartStopCompressor
1.4 bar1.3 bar22 - 40 kW
3.6 bar3.5 bar60 kW
If two phases are missing this is indicated as a motor
protection alarm.
Phase monitor
Stop with automatic restart:
■When a phase is below ~160V.
■Incorrect phase sequence.
Stop with manual restart:
■More than 30 minutes have passed since the above
events occurred.
Working area
See diagram page 67.
Time conditions
Minimum time between stop and start is 5 min.
Minimum time from start to next start is 20 min.
F1345Chapter 4 | Cooling circuit18
4 Cooling circuit

Compressor heater
When the compressor is inactive the compressor heater
is always active.
Expansion valve
Check that overheating occurs by measuring the vapour
temperature with a manometer and the suction gas
temperature with a service thermometer. The suction
gas temperature is measured on the suction pipe at the
entrance to the compressor.
Overheating is shown in the table below and must be
checked when the temperature of the heating medium
flow is 30 - 55 °C and the brine in is -5 - +15 °C.
superheatF1345
4 - 6 °C24 kW
4 - 6 °C30 kW
4 - 6 °C40 kW
4 - 6 °C60 kW
19Chapter 4 | Cooling circuitF1345

Compressor (GQ10)
Resistance range (Ω at 20 °C +/- 10 %)TypeSize
T2-T3[S-R]T1-T2[C-S]T1-T3[C-R]
3.643.643.64Scroll24
2.522.522.52Scroll30
2.082.082.08Scroll40
1.521.521.52Scroll60
Other components
DescriptionComponent
Actuator motor: 7 VA, 230/24 VAC, 50 Hz, IP 40. Running time approx 8 sec.Reversing valve
(QN10) Max. operating pressure: 1.0 MPa
Operating temperature: 5 - 80 °C (90 °C briefly)
(94)
(47)
(65,3)
24 - 60 kWHeating medium
pump (GP1) Max lift height: 7.5 m
Control signal: PWM 0-10 V DC (max-min speed)
180
26 110
48 85
Ø28
F1345Chapter 5 | Component description20
5 Component description