Oilon CUBE Series Guide

M8006 2123EN
10 June 2021
CUBE and ECO
INSTALLATION AND
COMMISSIONING

Contents
1 Introduction
1.1 Heat pumps covered in this manual...........................................................3
1.2 Instructions and diagrams...........................................................................3
1.3 Safety notice and warnings........................................................................ 3
1.4 Transportation and storage.........................................................................5
1.5 Scope of delivery........................................................................................ 6
1.6 Accessories................................................................................................. 7
2 Installation
2.1 Installation site.......................................................................................... 10
2.2 Dimensions, connections, and components............................................. 11
2.3 Outdoor temperature sensor (CUBE, ECO)............................................. 13
2.4 In-line heater (CUBE, ECO)..................................................................... 13
2.5 Bleeding the domestic hot water coil (CUBE).......................................... 15
2.6 Thermostatic mixing valve assembly (CUBE, optional)............................ 16
2.7 Change-over valve (ECO, optional)..........................................................18
2.8 DHW tank sensor (ECO).......................................................................... 18
2.9 Electrical connections, covers, and cable management...........................19
2.10 Pipe joints................................................................................................. 20
2.11 Removing the compressor unit from the frame (CUBE)........................... 20
3 Heating circuits
3.1 Buffer tank.................................................................................................22
3.2 Buffer tank sensor (CUBE, ECO)............................................................. 22
3.3 Flow temperature sensor for heating circuit 1 (CUBE, ECO)................... 23
3.4 Heating water temperature, return to condenser (ECO)...........................25
3.5 Heating circuit’s control valve...................................................................25
3.6 Heating circuit pump................................................................................. 28
3.7 Heating circuits 2 and 3............................................................................30
4 Commissioning
4.1 General......................................................................................................31
4.2 Signing in as a service level user............................................................ 31
4.3 Initial setup settings.................................................................................. 32
5 Operation
5.1 Heat pump operation................................................................................ 38
6 Technical data
6.1 Technical data...........................................................................................40
6.2 Compressor units......................................................................................45
6.3 Performance data......................................................................................46
M8006 2123EN 1 (54)

6.4 Condenser circuit flow.............................................................................. 47
6.5 Brine circuit flow........................................................................................47
6.6 Pumps....................................................................................................... 48
6.7 EU Product Data.......................................................................................51
2 (54) M8006 2123EN

1 Introduction
1.1 Heat pumps covered in this manual
Heat pump models with EasyAce control Designation Refrigerant
CUBE 6 EasyAce CUBEH607 R-410A
ECO 6 EasyAce ECO607 R-410A
CUBE 8 EasyAce CUBEH807 R-410A
ECO 8 EasyAce ECO807 R-410A
CUBE 10 EasyAce CUBEH1007 R-410A
ECO 10 EasyAce ECO1007 R-410A
CUBE 13 EasyAce CUBEH1307 R-410A
ECO 13 EasyAce ECO1307 R-410A
ECO 17 EasyAce ECO1707 R-410A
ECO 21 EasyAce ECO2107 R-410A
1.2 Instructions and diagrams
Document Designation
CUBE and ECO
Installation and commissioning
M8006
This manual
ECO and CUBE
Electric diagram
34793610 (110974)
ECO
Piping diagram
34793609
CUBE
Piping diagram
34793607
EasyAce
Quick guide
M8007
EasyAce
Installation and initial setup
M8005
EasyAce
User manual
M8004
1.3 Safety notice and warnings
Any maintenance and service procedures described in this manual should be
performed by competent and appropriately trained maintenance personnel only. The
unit contains no user-serviceable parts.
M8006 2123EN 3 (54)

Electrical safety
Once powered on, some of the unit’s components carry a hazardous
voltage. Always pay attention to electrical safety when working with or
near electrical components.
Before any maintenance or servicing, switch off electricity using the
main switch and ensure that there is no voltage present in the unit’s
components.
Refrigerant
Refrigerant leaking from an open or broken circuit may cause
asphyxiation, severe frost damage, arrhythmia, or neurological
symptoms. If you suspect a refrigerant leak, leave the area immediately,
and seek fresh air. Help and warn others.
The unit includes a hermetically sealed refrigerant circuit filled with refrigerant R-410A.
Refrigerant R-410A is a mixture of two refrigerants: HFC-32 (R-32, difluoromethane)
and HFC-125 (R-125, pentafluoroethane).
Refrigerant R-410A is a fluorinated greenhouse gas and, consequently, subject to the
EU F-gas Regulation. Please recover the refrigerant as required by law, and transfer
the refrigerant for recycling or disposal as required by applicable laws, rules and
regulations.
The refrigerant is heavier than air. The refrigerant may accumulate in enclosed spaces,
especially at or below the floor level (for example, in basements). Ventilate the spaces
by opening the space’s doors and windows from the outside. Use fans, if necessary.
Do not enter any space where you suspect there to be leaked refrigerant present.
Lifting and handling
The weight of the unit presents a crush hazard. Use safe work methods
when lifting and handling the unit.
Safety devices
Do not bypass, disable, or damage any of the unit’s pressure switches or other
safeguards with tools, by accessing the system’s software, or by any other means.
Bypassing the unit’s safeguards may lead to equipment failure, damage to property or
injury to people.
Wireless touch screen
Use the wireless touch screen provided with the unit only for operating the unit’s
automation system. Using the touch screen for any other purpose may cause
slowdowns or interference in the use of the unit’s automation system, or prevent the
system from being used altogether.
4 (54) M8006 2123EN

1.4 Transportation and storage
Storage
Store the unit upright in a warm, dry place. Protect the device against water and dust.
Do not stack goods on the unit.
Transportation
Transport the unit upright and protected against water and dust. Do not stack goods
on the unit. Use only safe lifting and handling methods when moving or lifting the
unit. After lifting, lower the unit carefully down onto the floor. Hard impacts can cause
equipment damage.
When lifting the unit, grab the unit by the frame. Do not lift the heat pump from the
bottom of the compressor unit.
● The unit’s exterior panels may be removed to make it easier to carry and move the
unit.
● The unit can be carried short distances by the side bars.
● If necessary, the compressor unit can be detached from the frame of the heat pump
before carrying or tilting the unit.*
● Do not lift or move the unit with the domestic hot water tank filled.*
*Applicable to heat pumps with an integrated DHW tank.
The compressor unit can be tilted up to 45 degrees from horizontal. If you need to tilt
the heat pump beyond 45 degrees, remove the compressor unit.
● If the unit is tilted beyond 45 degrees, the compressor may not receive proper
lubrication at startup. As a result, the compressor may become damaged.
● If the unit has been accidentally tilted beyond 45 degrees, leave the unit in vertical
position for at least three hours before starting the compressor.
M8006 2123EN 5 (54)

1.5 Scope of delivery
Equipment and components
Item PCS Oilon
designation
Wireless touch screen
● For using the EasyAce control
app to control the heat pump’s
automation system
1 378810400
Wireless touch screen ver. 1
Outdoor temperature sensor
● Sensor ID is TE0.
● Connect the sensor to the
cable TE0–W1.
1 36217543
Outdoor temperature sensor ver. 1
Shut-off valve
● Install the valves in the heat
pump’s brine and heating
water connections.
4 34033361
Shut-off valve ver. 1
Compressor fitting, 28 mm
● 1" external thread
● CUBE: install the parts in
heating circuit connections.
● ECO: install the parts in
heating circuit and brine circuit
connections.
2 34245086
Compression fitting ver. 1
Gasket
● Install the gaskets between
the brine circuit’s corrugated
hoses and shut-off valves.
CUBE:
2
ECO:
4
34797278
Gasket ver. 1
Torx T25 key
● Provided for opening the
device’s Torx T25 screws.
1 34798044
Torx T25 ver. 1
6 (54) M8006 2123EN

Sensors and actuators
EasyAce ECO CUBE

BRINE CIRCUIT
TE101 Brine circuit in (evaporator in) S S
TE102 Brine circuit out (evaporator out) S S
P101 Brine pump (evaporator circuit pump) S S
HEATING
TE201 Heating water in (condenser in) S S
TE202 Heating water flow (condenser out) S S
P201 Heating pump (condenser circuit pump) S S
EB203 In-line heater, condenser circuit O S
TE255 Buffer tank temperature (tank upper section) S O
TE266 Domestic hot water tank temperature (tank lower
section)
S S
FV202 Change-over valve O S
TE0 Outdoor temperature S S
HEATING CIRCUIT 1
TE212 Heating circuit 1 flow temperature S O
P221 Heating circuit 1 pump O O
FV222 Heating circuit 1 control valve O O
TE213 Room temperature 1 O O
HEATING CIRCUIT 2
TE222 Heating circuit 2 flow temperature OA OA
P221 Heating circuit 2 pump OA OA
FV222 Heating circuit 2 control valve OA OA
TE223 Room temperature 2 OA OA
HEATING CIRCUIT 3
TE232 Heating circuit 3 flow temperature OA OA
P231 Heating circuit 3 pump OA OA
FV232 Heating circuit 3 control valve OA OA
TE233 Room temperature 3 OA OA
REFRIGERANT CIRCUIT
COMP1 Compressor S S
TE2 Hot gas temperature S S
PS1 Low pressure switch S S
PS2 High pressure switch S S
DATA HUB
HUB Connection device for the EasyAce system
(EasyAce Hub)
S S
S: Standard equipment
O: Optional accessory, can be connected to the heat pump’s automation system and enabled without
additional equipment.
OA: Optional equipment that requires an auxiliary controller kit (controller + enclosure) for installation.
1.6 Accessories
For a full list of available accessories, please refer to brochures and price lists. Storage
tanks are presented in a separate storage tank brochure.
M8006 2123EN 7 (54)

Accessories
Accessory Auxiliary controller with enclosure
Designation 32586192
Description An enclosure containing an auxiliary controller for regulating heating circuit 2 and 3
or increasing the number of I/O slots for different functions. Installed on top of the
heat pump unit (ECO) or in the upper part of the heat pump frame (CUBE). 24 V
input from the heat pump, 230 V input from the building’s distribution board.
Documents Electric diagram: 34793611 (110992), manual 34793612
Accessory Temperature sensor NTC10k 5 m
Designation 36217266
Description Sensor with flexible cable (length: 5 m), metallic probe (diameter: 6mm, length: 50
mm), 1xNTC 10 kOhm, 2 wires, B(25/85)=3976, t0,9 7 s
Intended use Buffer tank temperature TE255
Heating circuit flow temperature TE212, TE222, TE232
Accessory Sensor pocket 6x200 G1/2
Designation 34021268
Description For 6 mm sensor probes, with cable gland, depth: 200 mm, G1/2" outer thread,
brass
Intended use Sensor pocket for buffer tanks and heating circuits
Compatible
equipment
36217266
Accessory Heating circuit control valve actuator, 3-point, 230 V
Designation 36962089
Description Esbe ARA651 12101200, 3-point SPDT, 230 V, 3 wires, 60 s 90°
Valve 34034065, 34034067, 34034068, 34034467
Accessory Heating circuit control valve actuator, 0–10 V 24 V
Designation 36962220
Description Esbe ARA639 12520100 (12520117 OEM), 0–10 V, 4–20 mA, 24 V AC/DC, 3wires,
15/30/60/120 s 90°, pre-set to 60 s (DIP switch 2 ON), pre-set to OPEN (with
increasing signal) counterclockwise CCW (DIP switch 6 ON)
Valve 34034065, 34034067, 34034068, 34034467
Accessory 3-way valve for heating circuit, DN 20-6.3
Designation 34034068
Description Esbe VRG131 11600900, DN20, Kvs 6.3, Rp 3/4"
Actuator 36962089, 36962220
Accessory 3-way valve for heating circuit, DN25-10
Designation 34034065
Description Esbe VRG131 11601100, DN25, Kvs 10, Rp 1"
Actuator 36962089, 36962220
Accessory 3-way valve for heating circuit, DN25-6.3
Designation 34034067
Description Esbe VRG131 11601100, DN25, Kvs 6.3, Rp 1"
Actuator 36962089, 36962220
8 (54) M8006 2123EN

Accessory 3-way valve for heating circuit, DN20-4
Designation 34034467
Description Esbe VRG133 11602900, DN20, Kvs 4, 22 mm crimped connection
Actuator 36962089, 36962220
Accessory Change-over valve kit
Designation GEOEXCV1
Description Includes a change-over valve and valve actuator (designation: 34034063 and
34034064).
Accessory Change-over valve
Designation 34034063
Description LK 525 MultiZone 3V 0661109, 28 mm compression fitting, Kvs 8, B: space heating;
A: domestic hot water heating
Actuator 34034064
Accessory Change-over valve actuator
Designation 34034064
Description LK EMV 110-K 066062, SPST, 230 V, 3 m. Not energized: B (space heating);
energized: A (domestic hot water heating).
Valve 34034063
Accessory Thermostatic mixing valve assembly
Designation 34034069
Description Thermostatic mixing valve for domestic hot water LK 545-22 AquaMix 090195;
domestic cold water inlet, shut-off and non-return valve LK 508 AquaNode 22
090025; fill valve LK 536 ThermoFill EA EN 1717; safety valve LK 514 MultiSafe
090116 10 bar
Intended use Thermostatic mixing valve assembly with fill connection.
Accessory In-line heater, 6 kW
Designation 37069089
Description 3 x 2 kW (230 V L–N), connection box, thermostat 25–85 °C, overheat protection
110 °C (manual reset), 28 mm steel pipes
Intended use Electric in-line heater for installation in an ECO heat pump’s condenser line.
Accessory Heating circuit pump
Designation 34023128
Description Grundfos UPM3 AUTO 25–70 130 12h
Cable 34023128
Accessory Supply cable for Grundfos UMP3
Designation 1150078
Compatible
equipment
34023128
M8006 2123EN 9 (54)

2 Installation
2.1 Installation site
Site planning and selection
● Install the unit and the associated equipment in a warm, dry place.
● The installation site’s ambient temperature must be within +5...+40 °C (non-
condensing).
● No condensate should accumulate onto the unit’s components from ambient air
(non-condensing atmosphere).
● The air at the installation site should be free of harmful quantities of dust or other
substances that may influence the heat pump’s performance, durability, or safety.
Unit base and leveling feet
Place the unit on a stable, steady base that can carry its entire weight. Mount the unit
securely in a vertical position onto its own leveling feet. Level the machine using the
machine’s leveling feet.
Maintenance and access clearance
The system must include shut-off valves that allow the unit to be isolated from the brine
circuit, heating circuit, and the domestic water system.
The unit should be easy to access for servicing from all sides. For ease of access:
● leave a sufficient clearance on all sides of the unit, or
● ensure that the compressor unit can be detached and moved to a location that has
enough space for servicing.
● Leave at least 80 cm of clearance in front of the unit.
● Leave at least 2 cm of clearance between the unit and any surrounding walls.
Access clearance ver. 1
Pos. Item
HP Heat pump
ACupboard, appliance, or
other object
10 (54) M8006 2123EN

Floor drain
The unit’s installation site must have a floor drain. The site’s floor should be inclined so
that any runoff from the unit leads towards the drain.
2.2 Dimensions, connections, and components
CUBE
CUBE, EasyAce ver. 1
measurements in the image are in millimeters
H Domestic hot water from storage tank
C Cold domestic water to storage tank 22 mm steel pipe
WI Heating water inlet (return)
WO Heating water outlet (flow) 28 mm copper pipe
BI Brine circuit in
BO Brine circuit out 1" inner thread and flat gasket
VA Bleed screw For bleeding the DHW coil
TE266 Domestic hot water sensor 
M8006 2123EN 11 (54)

DHWV Thermostatic mixing valve assembly with
safety valve (optional accessory) Oilon designation: 34034069
AF Adjustable feet M10, DIN/ISO 17/16 mm
MFC Front panel 
FS Front panel mounting screws Thumbscrews
EB203 Electric immersion heater 6 kW
FV202 Change-over valve A: domestic hot water
B: building heating
TC Switchboard cover panel (Torx T25) The unit’s fuses and a number of terminal
blocks are located behind this cover.
FC Compressor unit front panel (Torx T25) The unit’s switchboard is located behind this
cover.
HUB Connection device for EasyAce Behind a transparent panel (Torx T25)
ECO
A042037 ver. 2
measurements in the image are in millimeters
WI Heating water inlet (return)
WO Heating water outlet (flow)
BI Brine circuit in
BO Brine circuit out
1" inner thread and flat gasket
AF Adjustable feet M10, DIN/ISO 17/16 mm
TC Switchboard cover (Torx T25) The unit's fuses and some of its terminal
blocks are located under this cover.
FC Compressor unit front panel (Torx T25) The unit’s switchboard is located behind this
cover.
HUB Connection device for EasyAce Behind a transparent panel (Torx T25)
Fuses
ECO, CUBE
12 (54) M8006 2123EN

Marking Function Position,
ECO
Position,
CUBE
Default Upon
delivery
Default Upon
delivery
F1 Compressor’s motor
protection circuit breaker ON ON ON ON
F2 Electric immersion heater fuse N/A OFF ON ON
F3 Control fuse (automation
system fuse) ON ON ON ON
F4 Fuse shared by the unit’s pumps ON ON ON ON
2.3 Outdoor temperature sensor (CUBE, ECO)
The outdoor temperature sensor (TE0) is supplied already connected to its sensor
cable (TE0–W1). Install the sensor during the heat pump’s installation.
Extend the cable if necessary.
● Use a regular insulated copper twin cable for connecting the cable and extending
the cable.
● Select the cross-sectional area of the wires by consulting the table below.
● Join or splice the cable ends in a way that causes no additional electrical resistance
in the wires. Protect the joint against moisture and oxidation.
Cable length (m) 40 60 80 120
Wire cross-sectional area (mm2)0.50 0.75 1.0 1.5
Install the sensor outside the building with the sensor cable gland pointing downwards.
● Place the sensor in a position where the prevailing outdoor temperature can be
measured as accurately as possible.
● Make sure that the sensor is not exposed to solar radiation or heat from the
building.
Even though the sensor housing is protected against dust and water spray (IP65,
provided that the cable gland is pointed downwards), it is advisable to install the unit in
a location that is covered from rain. A good place for the sensor would be, for example,
under the eaves in a shady spot on the north wall of the building.
The type of the outdoor sensor is NTC10kΩ. The sensor’s β value is 3,435 K. Any
corresponding 10kΩ NTC sensor can be used as an alternative. The sensor’s β value
can be changed from the unit’s automation settings.
2.4 In-line heater (CUBE, ECO)
CUBE heat pumps are equipped with an in-line heater in the condenser line (label:
EB203). In ECO models, the in-line heater is optional.
M8006 2123EN 13 (54)

Accessory In-line heater, 6 kW
Designation 37069089
Description 3 x 2 kW (230 V L–N), connection box, thermostat 25–85 °C, overheat protection
110 °C (manual reset), 28 mm steel pipes
Intended use Electric in-line heater for installation in an ECO heat pump’s condenser line.
Setup (CUBE)
Reset the in-line heater’s overheat protection device during installation. The device
may be triggered by impacts or vibration during transport.
Installation (ECO)
Enable the heater from Initial setup settings (see chapter Commissioning).
The switchboards in ECO heat pumps have the electrical equipment necessary for
connecting an additional in-line heater (EB203), which is available as an optional
accessory.
1. Connect the heater to the switchboard as indicated in the unit’s electrical diagram.
2. Install the heater in the heating water flow line (from the condenser) as indicated in
the piping diagram.
3. Set the heater’s internal thermostat to its highest setting (85 °C).
4. Reset the heater’s overheat protection during installation.
The heater has either 28 mm stainless steel pipes or 1" threaded connections.
1. Before tightening any compression fittings, lubricate the inner surface of the ferrule.
2. Mount the fitting into position.
3. Tighten the fitting with your fingers until it is as tight as you can get it, then tighten
another 1/2 turns with a wrench.
General instructions
If the heater has been installed and enabled in the automation system, the standard
position for fuse F2 is ON. If the heater has not been installed, the fuse’s standard
position is OFF.
If an in-line heater has been installed and it needs to be disabled, disable the heater
from the heat pump’s settings. If an in-line heater has been installed and enabled in the
settings, do not set the heater’s fuse to the OFF position, unless there is a fault in the
heater.
In units that come with the in-line heater preinstalled, the heater’s internal thermostat
should not be adjusted. The thermostat has been set to its highest setting
(approximately 85 °C) at the factory. The thermostat will shut off power to the
immersion heater only if there is a malfunction in the heat pump’s automation system.
If you have accidentally turned the thermostat knob, turn the knob back to its highest
setting.
The in-line heater is equipped with an internal overheat protection device. The
device shuts the heater’s power off when the internal temperature of the immersion
heater cartridge exceeds 110°C. To reset the switch, press the button on the black
connection box on top of the heater. The button is under a transparent plastic lid.
14 (54) M8006 2123EN

Remove the plastic lid with a slot-head screwdriver. Before resetting the overheat
protection device, determine what caused the device to trip and address the issue. The
device may have tripped due to vibration during transport or relocation.
The electric immersion heater cartridge contains three 2-kW heating elements. The
combined power rating for the heating elements is 6 kW. The heating elements are
controlled in three stages. Stage 1 is connected to contactor K2. Its capacity is 2 kW.
Stage 2 is connected to contactor K3. Its capacity is 4 kW. When the third stage is
active, stages 1 and 2 are energized simultaneously.
Electric immersion heater ver. 2
Pos. Item
1 Thermostat
2 Overheat protection reset
3 Power connection
In-line heater 
2.5 Bleeding the domestic hot water coil (CUBE)
Bleed the unit’s internal coil carefully during installation. Draw water through the return
line and let the air out through the bleed screw. Set the change-over valve in position
B, and close the flow line shut-off valve. This way, the water flows only through the coil
and into the bleed valve.
When the unit is shipped from the factory, the change-over valve is set to position B.
The valve should be left in this position whenever domestic water is not being heated.
If necessary, the valve position can be changed using the automation system’s manual
operation function. Alternatively, detach the valve actuator and carefully turn the valve
shaft with a small wrench or similar tool.
M8006 2123EN 15 (54)

Bleeding DHW coil (EasyAce) ver. 1
Pos. Item
1 Water to return line
2Flow line shut-
off valve closed
3 Air out
4Change-over
valve in position B
2.6 Thermostatic mixing valve assembly (CUBE, optional)
Accessory Thermostatic mixing valve assembly
Designation 34034069
Description Thermostatic mixing valve for domestic hot water LK 545-22 AquaMix 090195;
domestic cold water inlet, shut-off and non-return valve LK 508 AquaNode 22
090025; fill valve LK 536 ThermoFill EA EN 1717; safety valve LK 514 MultiSafe
090116 10 bar
Intended use Thermostatic mixing valve assembly with fill connection.
The thermostatic mixing valve assembly is an optional accessory for CUBE heat
pumps. Install the assembly to the connections in the domestic hot water tank as
shown in the image. Note the texts and directional arrows in the valve ports.
16 (54) M8006 2123EN

Mixing valve assembly installation ver. 1
Pos. Item
KV Cold water to the DHW tank
VV Hot water from the DHW tank to the valve
BV Domestic hot water from the valve to the
DHW system
DHW tank connections
The domestic hot water tank has 22 mm stainless steel fittings for the valve assembly.
The valve assembly has 22 mm brass compression fittings.
1. Lubricate the inner surface of each ferrule before installation.
2. Mount the valve assembly into position.
3. Tighten the fittings with your fingers until they are as tight as you can get them, then
tighten another 3/4 of a turn with a wrench.
Pipe connections for the safety valve and the fill valve
These valves in the valve assembly have 15 mm brass compression fittings. Lubricate
the inner surface of each ferrule before installation.
1. Mount the valve assembly into position.
2. Tighten the fittings with your fingers until they are as tight as you can get them, then
tighten with a wrench.
Tighten copper pipe joints 1 1/4 turns and steel pipe joints 3/4 of a turn. Use pipe
support sleeves in soft and half-hard copper pipes. Tighten plastic pipes using pipe
support sleeves as indicated in the manufacturer’s instructions. As a general rule,
plastic pipes should be tightened 1 1/4 turns.
Thermostatic mixing valve LK 545 for domestic hot water
Domestic hot water temperature can be adjusted between +38 and +65°C. Increase
the temperature by turning the knob counterclockwise (+). In most cases, it is advisable
to set the valve to its highest temperature setting; this way, the valve will limit water
temperature only when it exceeds +65°C.
Domestic cold water inlet, shut-off and non-return valve LK 508
In normal operation, the valve is fully open (knob turned all the way counterclockwise).
In addition to the shut-off valve, the valve unit includes a non-return valve that prevents
water from the DHW tank from flowing into the domestic cold water system (the
domestic cold water supply pipe is connected to the bottom of the tank).
The valve includes a free (plugged) port for installing an anti-siphon valve.
M8006 2123EN 17 (54)

Fill valve LK 536 EA
This valve unit contains two shut-off valves, a non-return valve, and an inspection plug.
The fill valve meets EN1717 requirements.
Once the system has been filled, close both shut-off valves.
Safety valve LK 514 10 bar
Opening pressure: 10 bar. Test the valve regularly:
1. Turn the valve knob 1/4 of a turn counterclockwise, and check that water starts
dripping from the valve.
2. After the check, close the valve by turning the knob another 1/4 of a turn counter-
clockwise. The valve should close with a click.
Route the safety valve’s discharge pipe to a floor drain or a drain pan for safe
discharge, ensuring that the pipe has a continuous slope.
● The discharge pipe must be self-draining (the pipe should not be immersed in a
reservoir or the floor gully or allowed to freeze)
● The discharge pipe’s diameter must be equal to or larger than the safety valve’s
nominal diameter.
It is not allowed to place a shut-off valve that can be accidentally closed (or left closed)
between the safety valve and the circuit. Correspondingly, placing a shut-off valve on
the safety valve’s discharge side is not allowed.
2.7 Change-over valve (ECO, optional)
Accessory Change-over valve kit
Designation GEOEXCV1
Description Includes a change-over valve and valve actuator (designation: 34034063 and
34034064).
Install the change-over valve as indicated in the electric diagram and the piping
diagram. When the valve is not energized, the valve is in position B (for ‘building’),
which is used for space heating. When the valve is energized, the valve position is A
(for ‘aqua’), which is used for heating domestic hot water.
● Lubricate the inner surface of the ferrule before installation.
● Tighten the joint with your fingers until it is as tight as you can get it, then tighten
with a wrench.
● Tighten copper pipe joints 1/2 of a turn and steel pipe joints 1/2 of a turn. Use pipe
support sleeves in soft and half-hard copper pipes.
● Tighten plastic pipes using pipe support sleeves as indicated in the manufacturer’s
instructions. As a general rule, plastic pipes should be tightened 1 1/2 turns.
2.8 DHW tank sensor (ECO)
ECO heat pumps come with the DHW storage tank temperature sensor (TE266)
already connected. The sensor cable is approximately 4.5 m long. The sensor probe’s
diameter is 6 mm and length 50 mm.
18 (54) M8006 2123EN