Kensa Heat Pumps Evo User manual

Evo Heat Pump Operational Manual Version 2.0
Page 1 of 36
Evo Heat Pump
User Manual
Copyright ©2017 Kensa Heat Pumps Ltd
Manual
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Instrucons
General product
informaon
Safety informaon Introducon

Evo Heat Pump Operational Manual Version 2.0
Page 2 of 36
Contents Page
Secon Descripon Page
1....................... Introducon.................................................................................. 5
2....................... Safety Informaon ....................................................................... 6
2.1........................... Disposal/Decommissioning..................................................................................... 6
2.2........................... Returning Products ............................. ................................................................... 6
3....................... General Product Informaon ....................................................... 7
3.1........................... Kensa Heat Pumps .......................... ....................................................................... 7
3.2........................... Product Descripon ................................................................................................ 7
3.3........................... Kensa Evo Technical Details ........................................................................... 9
4....................... Operaonal Instrucons .............................................................. 10
4.1........................... Maximising the eciency of the heat pump .......................................................... 10
4.2........................... Controller................................................................................................................ 11
4.3........................ On start up………………………………………………………………. ........................................... 11
4.4........................ Guide to Home Screen icons…………………………………... ............................................ 12
4.5........................... Main Menu ............................................................................................................. 13
4.5.1........................ Main Menu Icons ................................................................................................... 13
4.6........................... Diagnoscs…............................................................................................................ 14
4.6.1…………………….. Diagnoscs—Temperatures……………………………………………………………………………….. 14
4.6.2…………………….. Diagnoscs—Pressure………………………………………………………………………………………… 15
4.6.3…………………….. Diagnoscs—Pumps Parameters……………………………………………………………………….. 15
4.6.4…………………….. Diagnoscs—Compressor Performance……………………………………………………………... 16
4.6.5…………………….. Diagnoscs—Pulse Input……………………………………………………………………………………. 16
4.6.6…………………….. Diagnoscs—Input Voltage………………………………………………………………………………… 17
4.6.7…………………….. Diagnoscs—History Log……………………………………………………………………………………. 17
4.6.8…………………….. Diagnoscs—DHW and External Immersion……………………………………………………….. 19
4.6.9…………………….. Diagnoscs—Supplementary Heat…………………………………………………………………….. 19
4.7……………………….. Commissioning Menu…………………………………………………………………………………………. 21
4.8……………………….. Error Log…………………………………………………………………………………………………………….. 22
4.9………………………… Sengs………………………………………………………………………………………………………………. 23
4.9.1…………………….. Sengs—Display and Sound………………………………………………………………………………. 23
4.9.2…………………….. Sengs—Date and Time……………………………………………………………………………………. 24
4.10……………………… My Product………………………………………………………………………………………………………… 25
5....................... Fault nding ................................................................................. 26
6....................... Maintenance…………...................................................................... 29
7....................... Complaint Procedure ................................................................... 31
8....................... Warranty...................................................................................... 32
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Contents Page
Secon Descripon Page
8.1........................... Terms and Condions............................................................................................. 32
8.1.1........................ Persons covered by the Warranty........................................................................... 32
8.1.2........................ Validity period of the Warranty.............................................................................. 32
8.1.3........................ Scope....................................................................................................................... 32
8.1.4........................ General excepons ................................................................................................. 32
8.1.5........................ Care of Duty ............................................................................................................ 33
8.1.6........................ In the event of Damage .......................................................................................... 33
8.1.7........................ Replacement Parts.................................................................................................. 33
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This page is intenonal le blank.
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Evo Heat Pump Operational Manual Version 2.0
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For further informaon on
ground source heat pumps and
their applicaon, please refer
to www.kensaheatpumps.com
1. Introducon—a message from the Managing Director
Thank you for choosing a Kensa Evo ground source heat pump for your
project. Kensa Heat Pumps has been manufacturing ground source heat
pumps since 1999 and have signicant experience in providing these systems
in domesc and commercial applicaons.
Your Kensa heat pump will provide you with many years of low energy bills
and maintenance free running while also reducing your carbon footprint.
Kensa Evo heat pumps are designed for ease of operaon and once set by
your installer to provide the opmum ow temperature for your heang system should not require
adjusng.
The purpose of this manual is to guide you through the operaonal aspects of living with a heat pump.
Finally, please feel free to contact Kensa should you have any quesons, wish to consider ground source
heat pumps for any future projects or even just to share your experiences of using a ground source heat
pump with us.
Simon Lomax
Managing director
Kensa Heat Pumps Ltd
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2. Safety informaon
Safe operaon of this unit can only be guaranteed if it is properly installed and commissioned in compli-
ance with the operang instrucons. General installaon and safety instrucons for pipeline and plant
construcon, as well as the proper use of tools and safety equipment must also be complied with.
Manufacturer:-
Kensa Heat Pumps
Mount Wellington
Chacewater
Truro
Cornwall
TR4 8RJ
Tel [phone]
www.kensaheatpumps.com
The product is designed and constructed to withstand the forces encountered during normal use. Use of
the product for any other purpose, or failure to install the product in accordance with these Installaon
and Operaon Instrucons, could cause damage to the product, will invalidate the warranty, and may
cause injury or fatality to personnel.
2.1 Disposal/Decommissioning
Kensa oer a life me decommissioning service for this product. This is available on a return to base basis
(carriage at users cost).
Disposal of any anfreeze water mix should follow the disposal instrucons as laid out on the COSH Safety
Data Sheet in the Installaon Manual.
2.2 Returning products
Customers and stockists are reminded that under EC Health, Safety and Environment Law, when returning
products to Kensa Heat Pumps they must provide informaon on any hazards and the precauons to be
taken due to contaminaon residues or mechanical damage which may present a health, safety or
environmental risk. This informaon must be provided in wring including Health and Safety data sheets
relang to any substances idened as hazardous or potenally hazardous.
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3. General Product Informaon
This manual explains how to install, commission and operate a Kensa ground source heat pump.
3.1 Kensa Heat Pumps
Kensa Heat Pumps is the leading UK manufacturer of a full range of ground source heat pumps. Kensa
provides exceponal levels of experse and advice on the use, design and applicaon of heat pumps.
Kensa have been acve in the heat pump market since 1999 and remains a well-respected company, not
only in the industry but also with all our customers and stakeholders.
Since 1999 the company has manufactured and installed over four thousand heat pumps of various types
throughout Europe and manufacture ranges suitable for the domesc market and specically designed for
commercial applicaons.
Kensa are ISO9001 approved for the design and manufacture of heat pumps and hold an unique status as
being accredited by Microgeneraon Cercaon Scheme for both the manufacture and installaon of
ground source heat pumps. Kensa were also a founding member of the Ground Source Heat Pump
Associaon and play a major role in helping to raise the prole of heat pumps and formulate Industry
Standards.
Kensa’s aim has always been to take the mystery and complexity out of heat pumps, designing systems
that can be easily installed without any specialist training, making the product available to a larger market
and helping to reduce CO2 emissions while reducing client’s energy bills.
3.2 Product descripon
Heat pumps basically extract solar energy stored in the ground, water courses and in the air and convert
this to a higher temperature to use in a building’s heang distribuon system. They work in a similar
manner to a fridge in reverse, where the inside of the fridge is the heat source and the grill at the back of
the fridge is the heang system.
Fig 1. Heat pump Schemac
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A ground source heat pump (GSHP) extracts heat from the ground by circulang a cold soluon of water
and anfreeze (brine) around pipes buried in the ground. As these pipes are buried below 1m in depth,
where the temperature of the ground remains prey constant (8 to 10oC), heat is absorbed from the
ground into the uid (approximately 5oC). This brine is then passed through one side of a heat exchanger
(called the evaporator) and a refrigerant through the other. The refrigerant has a very low boiling point
and by absorbing the energy in the brine this causes the refrigerant to evaporate.
The refrigerant gas is then passed through a compressor where its pressure is increased which in turn
increases its temperature. This high pressure hot gas then ows around a second heat exchanger (called a
condenser) with the heang distribuon uid passing through the other side of the heat exchanger.
Energy is then transferred from the refrigerant into the heang distribuon system; this in turn causes the
refrigerant to condense.
This high pressure cold refrigerant is then passed through an expansion valve (or throle) and the
pressure is reduced. The whole cycle is then repeated.
GSHPs are an extremely energy ecient technology, with every unit of electricity used (to drive the
pumps and compressor) producing between 3 and 4 units of heat.
The Kensa Evo Heat Pump is designed to provide a low cost renewable heat source for a buildings heang
system. In addion, and if required, the Kensa Evo can also provide domesc hot water. Heat pumps can
provide lower running costs and will generate signicantly lower carbon emissions compared with
tradional fossil fuels.
Fig 2. An Evo heat pump
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3.3 Kensa Evo Technical Details—Single Compressor
Nominal
Thermal
Output
Power
supply
rang
Max
running
Current
Typical
running
current
Typical
starng
current
Power
input*
Nominal dry
weight
(Approx)
Compressors Dimensions Connecon size Recommended
minimum heat transfer area in DHW tank (not supplied)
kW Amps Amps Amps Amps kW Kg Number HxWxD mm OD m2
Single Phase—230 Volts AC 50 Hz
725 17 9 18 1.7 153 Single 1145x600x575 28 1.75 925 22 13 29 2.2 154 Single 1145x600x575 28 2.25
13 40 33 16 41 3.2 167 Single 1145x600x575 28 3.25 17 50 45 24 45 4.4 167 Single 1145x600x575 28 4.25
380-420V 50Hz
15 16 12 874 3.8 170 Single 1145x600x575 28 3.75
The gures above are based on a rang to BS EN14511, 0 deg C from the ground, 35 deg C ow to underoor.
* This gure includes the power consumpon of the inbuilt water pumps
For claricaon of starng currents and details on how these gures are calculated please contact Kensa.
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4. Operaonal Instrucons
Always ensure that individuals using the appliance have read and fully understood the Operaon
instrucons.
Do not operate the appliance with the cover removed.
Do not operate the appliance in anything other than dry condions.
Do not exert any strain on electrical or pipe connecons to the appliance.
Do not put any foreign object into the appliance.
Do not spill water or any other substance onto the appliance.
4.1. Maximising the eciency of the heat pump.
In order to increase the eciency of the heat pump and lower the overall energy costs of the building
there are a number of simple steps that can be taken.
1. Insulate the property as much as possible. This will reduce the heat loss from the building, which in
turn will reduce running me of the heat pump and hence energy costs.
2. The lower the ow temperature from the heat pump the higher the eciency so consider a heang
system with a large heat eming area such as underoor.
3. If in a well insulated building with underoor mounted in screed throughout, consider running your
heat pump on o-peak electricity taris such as Economy 10.
4. With underoor systems, avoid the use of insulave coverings such as thick carpets and wooden
oors.
5. Consider the use of Solar Thermal for the producon of the majority of DHW.
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4.2 Controller
The heat pump controller ed to the Evo has been especially designed for the applicaon. It uses clear
and concise language to indicate faults and uses a logical and intuive menu structure providing trouble
free commissioning.
4.3 On Start up
On inial start up the following screen is displayed.
Following this the screen will default to the home screen. If there is no acvity the screen will au-
tomacally dim aer 10 minutes. This is seable within the controller.
Fig 3 Start up screen
Fig 4 Home screen
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Return temperature from the
heang/cooling distribuon
Load side pressure
and temperature
Ground side pressure
and temperature
Menu buon
Heang Mode
Indicaon of
compressor
running
4.4 Guide to Home Screen icons
Menu Buon—This provides access to the lower menus
Compressor Icon—This is lit when the compressor is running. If the icon is ashing, it
indicates there is a call on the compressor, however the compressor has not had the
required minimum stop period (6 minutes) since it was last operaonal.
Twin Compressor Icon—This is lit when the compressor is running and the unit is a twin
compressor unit.. If the icon is ashing, it indicates there is a call on the compressor,
however the compressor has not had the required minimum stop period (6 minutes)
since it was last operaonal.
Unit is in heang mode
Unit is in heang mode operang the second temperature set point.
Unit is in domesc hot water heang mode
Unit is in cooling mode
Unit is in passive cooling mode
A warning has occurred. Pressing this icon will display the type of warning, possible
reason and soluon.
Weather compensaon is enabled
A fault has occurred. Pressing this icon will display the type of fault, possible reason and
soluon.
Fig 5 Start up screen
icons
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4.5 Main Menu
4.5.1 Main Menu Icons
Home Icon—This will return the user to the home screen.
Back Buon– Returns the user back to the previous screen.
Diagnoscs—Enters the diagnoscs menu displaying various readings such as temperatures and
pressures to aid fault nding.
Commissioning— Enters the commissioning menu.
Error Log—Logs every warning and fault that occurs and logs when they are cleared.
Sengs— Enters the sengs menu where the date, me, display and sound can be changed.
My Product—Contains details of product such as serial number, capacity, etc.
Fig 6 Main menu
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4.6 Diagnoscs Menu
Fig 7 Diagnoscs
Menu
Fig 8 Diagnoscs—
Temperature Menu
4.6.1 Diagnoscs—Temperatures
The temperature screen shows the current temperature measured within the system.
Load side
 T1—Temperature of the heang/cooling distribuon uid returning to the heat pump.
 T2—Temperature of the heang/cooling distribuon uid leaving the heat pump.
 T3—Temperature of the heang/cooling distribuon uid leaving the heat pump. (This is only
displayed for twin compressor units.)
Ground side
 T4—Temperature of the thermal transfer uid returning to the heat pump from the ground.
 T5—Temperature of the thermal transfer uid leaving the heat pump to the ground.
 T6 - Temperature of the thermal transfer uid leaving the heat pump to the ground. (This is only
displayed for twin compressor units.)
Discharge Pipe
 T7—Temperature of the refrigerant in the discharge pipe of the compressor (le hand side
compressor for twin units).
 T8—Temperature of the refrigerant in the discharge pipe of the compressor (right hand side
compressor, only displayed for twin compressors units).
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Weather Compensaon
 T9—Weather compensaon set point, i.e. the external temperature at which the weather
compensaon starts to operate.
 Mulplier—This is the mulplier of the number of degrees that the water set point rises for each
degree change sensed in the outdoor temperature. Ideally this should be a value between 1.0 and
1.5 which would suit most properes.
 Maximum Variaon—This is the maximum amount of posive deviaon that is allowed by the
weather compensaon.
4.6.2 Diagnoscs—Pressures
The pressure screen shows the current pressures measured within the system.
 Load Current Pressure—pressure in the heang system.
 Ground Current Pressure—pressure within the ground arrays.
 Sucon LP P3—Current pressure measured within the sucon pipe of the le hand compressor in a
twin unit or single compressor model. The fault set point is shown below.
 Discharge HP P5—Current pressure measured within the discharge pipe of the le hand compressor
in a twin unit or single compressor model. The fault set point is shown below.
 Sucon LP P4—Current pressure measured within the sucon pipe of the right hand compressor in
a twin unit. The fault set point is shown below.
 Discharge HP P6—Current pressure measured within the discharge pipe of the right hand
compressor in a twin unit. The fault set point is shown below.
4.6.3 Diagnoscs—Pumps Parameters
Fig 9 Diagnoscs—Pressure
Menu
Fig 10 Diagnoscs—Pump
Parameters Menu
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The pumps parameter screen shows the current informaon of the water pumps within the heat pump.
 State—Indicates whether the pump is running or not.
 % - Real me feedback from the pump indicang power consumpon of the pump and its electrical
performance
 Exercise Mode— Whether the pump exercise mode is enabled. This mode spins the pumps at a
dened frequency and is used to avoid the water pumps ‘scking’ in mes of non-operaon.
 Exercise Frequency—The frequency of the exercise mode in days.
4.6.4 Diagnoscs—Compressor Performance
The Compressor Performance screen provides informaon on how the compressor is operang.
 Coecient of Performance—This provides an indicaon of the COP of the compressor only. It is not
the system or heat pump COP, SCoP or SPF, but should provide a good indicaon into how the
compressor is performing. For an accurate COP, electrical meters and heat meters need to be ed
to the heat pump.
Both the current and average value are shown.
 Refrigerant— Type of refrigerant used in the compressor. Compressor 2 is only shown for twin
compressor models
 State— Indicates whether the compressor is running or not.
 Run hours—The number of hours the compressor has run. This is not reseable.
4.6.5 Diagnoscs—Pulse Input
Fig 11 Diagnoscs—
Compressor Performance
Menu
Fig 12 Diagnoscs—Pulse
Input Menu
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The Pulse Input screen displays the number of pulses detected of any device connected to the heat pump.
Devices such as electricity meters, heat meters, etc. The display only shows the number of pulses
detected, for example if a single pulse was an indicaon of 100 units, it would only register 1 pulse and to
get the true reading the number of pulses needs to be mulplied by 100 (or whatever the single pulse is
meant to represent).
4.6.6 Diagnoscs—Input Voltage
This screen indicates the measured voltage connected to the heat pump. It is an indicaon of the
approximate voltage with a tolerance of +/- 10%. It also indicates the voltage at which a fault is indicated
and registered.
4.6.7 Diagnoscs—History Log
The history log records various readings from the heat pump every 15 minutes. It stores data over the last
37 hours and is a useful tool to help with intermient fault nding. The unit itself holds data further back
which can be accessed only by a Kensa Engineer.
The readings recorded are:-
 T2—Temperature of the heang/cooling distribuon uid leaving the heat pump.
 T3—Temperature of the heang/cooling distribuon uid leaving the heat pump. (This is only dis-
played for twin compressor units.)
 T1—Temperature of the heang/cooling distribuon uid returning to the heat pump.
 P1—Pressure of the heang/cooling distribuon uid circuit.
 P2—Pressure of the ground loop circuit.
Using the arrows further informaon can be interrogated or early periods of me.
Fig 13 Diagnoscs—Input
Voltage Menu
Fig 14 Diagnoscs—History
Log Menu
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 T4—Temperature of the thermal transfer uid returning to the heat pump from the ground.
 T5—Temperature of the thermal transfer uid leaving the heat pump to the ground.
 T6 - Temperature of the thermal transfer uid leaving the heat pump to the ground. (This is only
displayed for twin compressor units.)
 T7—Temperature of the refrigerant in the discharge pipe of the compressor (le hand side
compressor for twin units).
 T8—Temperature of the refrigerant in the discharge pipe of the compressor (right hand side
compressor, only displayed for twin compressors units).
 P3—Current pressure measured within the sucon pipe of the le hand compressor in a twin unit
or single compressor model.
 P4—Current pressure measured within the sucon pipe of the right hand compressor in a twin unit.
The fault set point is shown below. (This is only displayed for twin compressor units.)
 P5—Current pressure measured within the discharge pipe of the le hand compressor in a twin
unit or single compressor model.
 P6—Current pressure measured within the discharge pipe of the right hand compressor in a twin
unit. (This is only displayed for twin compressor units.)
Fig 15 Diagnoscs—History
Log Menu 2nd page
Fig 16 Diagnoscs—History
Log Menu 3rd page
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4.6.8 Diagnoscs—DHW and External Immersion
DHW
 State— Whether the DHW cycle is currently running..
 Lock Out (HH,MM) - Amount of me before a second DHW cycle is allowed to restart following a
completed DHW cycle.
 Cut Out (bar) - Comp 1—The pressure at which the pressure transducer switch terminates the
DHW cycle on a single compressor model or the le hand compressor of a twin.
Comp 2—The pressure at which the pressure transducer switch terminates the
DHW cycle on the right hand compressor of a twin.
Ext. Immersion
 Relay—Whether the funcon is enabled or disabled within the controller.
 Duraon (HH,MM) - Amount of me the immersion heater call signal is live for following a DHW
cycle.
 Pasteurisaon—This indicates whether a pasteurisaon cycle is enabled on the controller or not.
During a pasteurisaon a call signal is sent to an external relay to operate the immersion heater on
a separate supply voltage.
 Duraon (HH,MM) - Duraon of the pasteurisaon cycle.
 Frequency (Days) - How oen the controller calls for a pasteurisaon cycle.
4.6.9 Diagnoscs—Supplementary Heat
Supplementary heat provides a signal to a secondary heat source when the heat pump detects it cannot
maintain or reach target temperatures. It does not monitor the external ambient temperature, but mon-
itors the heat pump return temperature from the heang system. If it detects that the return temper-
ature is not increasing above a seable dierenal for a seable period of me it acvates a relay to ac-
Fig 17 Diagnoscs—DHW and
external immersion menu
Fig 18 Diagnoscs—
Supplementary Heat Menu
Warranty Complaint Procedure Maintenance Fault Finding Operaonal
Instrucons
General product
informaon
Safety informaon Introducon

Evo Heat Pump Operational Manual Version 2.0
Page 20 of 36
vate a supplementary heat source on a separate supply voltage. The call for supplementary heang will
cancel once the return temperature increases to within the seable cut out dierenal.
 Relay—Whether the supplementary heat funcon is enabled or disabled.
 Time Delay (HH:MM) - The period of me in hours that the return temperature stays below the set
point temperature minus the cut in dierenal. i.e. If the cut in dierenal is 10oC and the set point
is 45oC, the amount of connuous compressor run me while the return temperature is below 35oC
before the supplementary heat is called for.
 Cut-In Di (oC) - The set dierence between the return temperature from the heang distribuon
system and the point where the period of connuous compressor operaon (Time Delay) is
measured.
 Cut-Out Di (oC) - The set dierence between the return temperature from the heang distribuon
system and the point at where the supplementary heat call is cancelled.
Introducon Safety informaon General product
informaon
Operaonal
Instrucons
Fault Finding Maintenance Complaint Procedure Warranty