Oilon VSi 6-14 User manual

M8011 2204EN
25 January 2022
Installation and
operation manual
VSi 6-14, VMi 6-17
ÄssäControl

Contents
1 Introduction
1.1 Safety notice and warnings........................................................................ 3
1.2 Transportation............................................................................................. 5
1.3 Product description..................................................................................... 5
1.4 System structure and operation..................................................................6
1.5 Optional accessories...................................................................................9
2 Installation
2.1 Before installation......................................................................................11
2.2 Bivalent operation: use with supplementary heating................................ 11
2.3 Installation site requirements.................................................................... 11
2.4 Removing the packaging and inspecting the contents............................. 12
2.5 Removing transportation supports............................................................13
2.6 HVAC installation...................................................................................... 13
2.6.1 Detaching crown plate.............................................................................. 14
2.6.2 Brine circuit and fill and bleed unit installation, VSi..................................15
2.6.3 Brine circuit and fill and bleed unit installation, VMi................................. 16
2.6.4 Filling and bleeding the brine circuit.........................................................16
2.6.5 Heating circuit connections.......................................................................18
2.6.6 Filling and bleeding the storage tank and the heating circuits..................18
2.6.7 Domestic hot water connections...............................................................19
2.6.8 Speed control for heating circuit pumps...................................................20
2.6.9 HVAC checklist......................................................................................... 21
2.7 Electrical installation and external sensors...............................................21
2.7.1 Supply connections...................................................................................22
2.7.2 Outdoor temperature sensor.....................................................................22
2.7.3 Room temperature sensor (optional)........................................................23
2.7.4 Load guard................................................................................................23
2.7.5 Electrical installation checklist.................................................................. 24
3 Commissioning
3.1 Preparations.............................................................................................. 25
3.2 First start checklist....................................................................................25
3.3 Typical problems during commissioning...................................................25
4 Operation
4.1 The ÄssäControl system...........................................................................27
4.2 Operating the touchscreen....................................................................... 27
4.3 Changing the language.............................................................................28
4.4 Quick functions..........................................................................................28
4.4.1 Room temperature change....................................................................... 28
4.4.2 Room temperature change with room temperature measurement
active......................................................................................................... 29
4.4.3 Hot water intensification – temporary boost to hot water output...............29
4.4.4 At home and Away................................................................................... 30
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4.4.5 Timers........................................................................................................31
4.4.6 Measurements...........................................................................................32
4.4.7 Heating curves.......................................................................................... 33
4.4.8 Boiler settings: storage tank settings........................................................34
4.4.9 Accessories............................................................................................... 36
4.5 Menu functions..........................................................................................37
4.6 Menu functions: Other settings.................................................................37
4.6.1 Heating circuit min and max temperature.................................................38
4.6.2 Backup device settings: options for backup heater.................................. 39
4.6.3 Partial power settings............................................................................... 39
4.6.4 Summer functions..................................................................................... 39
4.6.5 Magna geo control: brine circuit pump settings........................................40
4.7 Cooling (optional)......................................................................................40
4.7.1 Free cooling.............................................................................................. 40
5 Maintenance
5.1 Maintenance and care.............................................................................. 43
5.2 Typical problems during operation........................................................... 43
5.3 Alarms....................................................................................................... 45
5.4 ÄssäControl maintenance functions......................................................... 46
5.4.1 Manual control.......................................................................................... 46
5.4.2 Input and output states.............................................................................47
5.4.3 Running information..................................................................................49
5.4.4 Hot water temperature limiter................................................................... 49
5.4.5 Position valve settings: settings for control valves................................... 50
5.4.6 Partial / full power: switching between monovalent and bivalent
operation....................................................................................................51
5.4.7 Temperature gauges.................................................................................51
5.4.8 External alarm...........................................................................................52
5.4.9 Soft starter alarms.................................................................................... 52
5.4.10 Super heat circuit control: desuperheater control options........................ 52
5.4.11 Boiler maximum limits...............................................................................53
5.4.12 Cooling (optional)......................................................................................53
5.4.13 Return factory settings: resetting the heat pump......................................54
6 Technical data
6.1 Technical data...........................................................................................55
6.2 Heat pump dimensions............................................................................. 56
6.3 Electrical data............................................................................................59
6.4 Performance data......................................................................................60
6.5 Brine circuits............................................................................................. 62
6.6 Heating circuits..........................................................................................64
6.7 EU product data, VSi................................................................................64
6.8 EU product data, VMi............................................................................... 67
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1 Introduction
1.1 Safety notice and warnings
Read these instructions carefully before installation, commissioning, operation, or
maintenance of the device. The given instructions must be followed. Throughout this
manual, the following three symbols are used to point out very important information:
Be careful. The DANGER symbol indicates a possible danger of bodily
harm or lethal injury.
Pay attention. The CAUTION sign indicates a possible danger of
damage to the device, components or surroundings.
Note indicates tips, hints, and other essential information.
Keep these instructions as well as the electrical diagrams available near the device.
Installation, commissioning, or service of the appliance is to be carried
out by authorized and trained personnel only, adhering to all local
regulations and requirements.
Wear proper hearing protection and personal protective equipment,
such as protective footwear, gloves, and safety goggles when
necessary.
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.
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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.
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.
Lifting and handling
The weight of the unit presents a crush hazard. Use safe work methods
when lifting and handling the unit.
During lifting, do not walk or work under the heat pump or any other
suspended load.
Other considerations
To avoid slipping, keep floor surfaces dry, and seal off or report any
leaks that you detect.
The heat pump does not contain any user-serviceable parts.
The manufacturer shall not be liable for any defects in the equipment
resulting from improper installation or any costs arising thereof.
Only certified technicians who have received the appropriate training for
installing Oilon and Lämpöässä heat pumps may use the heat pump’s
maintenance functions.
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1.2 Transportation
During lifting, do not walk or work under the heat pump or any other
suspended load.
Transport the heat pump in an upright position.
● If the heat pump needs to be tilted to pass through a doorway, do not tilt the unit
beyond 45°.
● If the heat pump needs to be tilted beyond 45°, detach the compressor unit.
Use a pallet jack or similar machine to transfer the heat pump. Lift the unit from the
bottom.
1.3 Product description
VSi and VMi ground source heat pumps are especially suited for use as the primary
source of heating for new and renovated residential buildings and holiday homes
as well as for apartment-specific heating in semi-detached and terraced houses. To
ensure trouble-free operation, each heat pump undergoes configuration, testing, and a
test run at the factory. The heat pumps feature a built-in storage tank.
Type plate
The heat pump’s type plate is located behind the heat pump’s white cover panel. The
unit’s serial code is marked on the type plate.
This product is CE-marked.
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1.4 System structure and operation
Ground source heating system
Ground source heat pump system ver. 1
Principle drawing of a ground source heating system.
1: brine circuit (horizontal ground loop, borehole or lake/pond system); 2: ground source heat pump;
3: heating circuits (radiator heating or floor heating); 4: domestic hot water heating; 5: passive cooling
(optional).
A ground source heat pump can extract thermal energy (heat) from soil, bedrock, or a
body of water. Of the total energy required for heating, a heat pump collects more than
75% from natural sources. Running the heat pump and the various system components
requires electricity, which means that the remaining 25 percent is electrical power
consumed by the process of extracting thermal energy.
A ground source heat pump system has three main components: the brine circuit,
the compressor unit (the actual heat pump), and the heating circulation. The three
circulations are isolated from each other, which means that none of the fluids used
(brine, refrigerant, and water) are mixed together at any part of the process. Instead,
heat is transferred between the fluids using plate heat exchangers.
Brine circuit
When the sun heats up the earth, thermal energy is stored in the soil, the bedrock,
and in bodies of water. To extract this heat, the ground source heat pump circulates a
cold mixture of water and ethanol (brine) inside a long loop of pipe embedded in the
earth (the brine circuit). As the brine passes through the brine circuit, its temperature
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increases by a few degrees. The brine is then pumped into a heat exchanger inside the
heat pump: the evaporator. In the evaporator, thermal energy is transferred from the
brine to low-pressure refrigerant, evaporating the refrigerant.
In vertical systems, a deep well is bored into the bedrock. In horizontal systems, an extensive coil of
plastic pipe (PEM 40/10) is buried to a depth of 1–1.2 meters or more or submerged in a body of water
(minimum depth: 3 meters).
The brine solution includes ethanol to prevent it from freezing. After being pumped through the brine
circuit, the temperature in the brine to the evaporator is approximately 0 ºC, but can be higher in the
summer and lower in the winter.
The compressor unit
From the evaporator, the refrigerant vapor is transferred into the compressor which
compresses the vapor to a high pressure. At this stage of the process, the refrigerant’s
temperature increases to over 100 ºC. After the compressor, the refrigerant is referred
to as hot gas.
Hot gas is transferred from the compressor to heat exchangers (desuperheater and
condenser). Heating water from the storage tank circulates through these heat
exchangers, taking thermal energy from the hot gas. As the refrigerant releases its
thermal energy, the water heats up, and the refrigerant cools down, condensing into a
liquid.
The liquid refrigerant is transferred through a filter drier into the expansion valve,
where the pressure of the liquid refrigerant decreases. The refrigerant is transferred
into the evaporator, and the cycle starts over from the beginning.
Desuperheater
As heat is extracted from the hot gas, its temperature decreases to a point where the
refrigerant starts to condense into liquid. This point is close to the temperature required
for space heating (typically around 35–55 ºC). However, after the compressor, the
temperature in the hot gas is approximately 120 ºC, which means that it must first cool
down. Instead of letting the heat dissipate, it can be extracted with a desuperheater.
The extracted superheat can then be used to bring pre-heated domestic hot water to
its final temperature.
Storage tanks, heating circuits, and domestic hot water
V series heat pumps feature a built-in storage tank.
Cool water from the bottom of the storage tank circulates through the compressor
unit which heats up the water. Once heated, the water returns to the tank at a higher
level. The water in the hot water storage tank circulates through the building’s heating
system, which consists of one or more heating circuits.
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VSi operation ver. 1
Principle drawing of a V series heat pump. Storage tank on top,
heat pump at the bottom.
Pos. Item
1 Evaporator
2 Compressor
3 Desuperheater
4 Condenser
5 Expansion valve
6a Upper storage tank section
6b Lower storage tank section
7 Domestic hot water coils
8 Domestic cold water inlet
9 Domestic hot water outlet
The heat pump features desuperheater technology which maximizes the benefits and
utilization of a heat pump in overall heating. The heat pump’s built-in storage tank
has two sections separated with a baffle as well as a domestic hot water coil running
through the entire tank.
The top part of the storage tank, or, the upper storage tank, is heated with superheat
energy: thermal energy extracted by the desuperheater. The desuperheater provides
heating water at a very high temperature. The high-temperature layer in the tank is
reserved for heating domestic hot water to its final temperature. If required, high-
temperature output from the upper tank can be used in the heating system. This can be
useful especially in radiator systems.
The lower section of the storage tank, or, the lower storage tank, is used to store
warm water for the building’s central heating. The heat pump’s condenser heats up the
section to a flow temperature level required by the heating circuits. The temperature
in the section is regulated based on a heating curve. In normal heating conditions,
the temperature in the section depends on the current need for heating (‘floating
condensing’ operation).
Heat distribution can be arranged using water circulation (floor heating or hot water
radiators) or through air heating. The best coefficient of performance can be achieved
with floor heating, since the lower the temperature of the heat transfer, the better the
coefficient of performance.
Domestic hot water heating
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