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Kensa Heat Pumps Shoebox User manual

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Shoebox Heat Pump Operational Manual Version 1
Page 1 of 20
Shoebox Heat Pump
User Manual
Fault Finding Operational Instructions General product information Safety information Introduction Warranty
Copyright ©2013 ensa Engineering Ltd
Shoebox Heat Pump Operational Manual Version 1
Page 2 of 20
Contents Page
Section Description Page
1....................... Introduction.................................................................................. 3
2....................... Sa ety In ormation ....................................................................... 4
2.1........................... Disposal/Decommissioning..................................................................................... 4
2.2........................... Returning Products ............................. ................................................................... 4
3....................... General Product In ormation ....................................................... 5
3.1........................... ensa Engineering .......................... ....................................................................... 5
3.2........................... Product Description ................................................................................................ 5
3.3........................... ensa Shoebox Technical Details ........................................................................... 9
4....................... Operational Instructions .............................................................. 10
4.1........................... Maximising the efficiency of the heat pump .......................................................... 10
4.2........................... Display .................................................................................................................... 10
4.2.1........................ To read flow temperatures and refrigerant pressures ........................................... 12
4.2.2........................ To change the heat pump return flow temperatures ............................................ 12
4.3........................... DHW Production ..................................................................................................... 12
4.4........................... Maintenance .......................................................................................................... 13
5....................... Fault inding ................................................................................. 14
6....................... Complaint Procedure ................................................................... 15
7....................... Warranty...................................................................................... 16
7.1........................... Terms and Conditions............................................................................................. 16
7.1.1........................ Persons covered by the Warranty........................................................................... 16
7.1.2........................ Validity period of the Warranty.............................................................................. 16
7.1.3........................ Scope....................................................................................................................... 16
7.1.4........................ General exceptions ................................................................................................. 16
7.1.5........................ Care of Duty ............................................................................................................ 17
7.1.6........................ In the event of Damage .......................................................................................... 17
7.1.7........................ Replacement Parts.................................................................................................. 17
Safety information
General product information
Operational Instructions Fault Finding Warranty Introduction
Shoebox Heat Pump Operational Manual Version 1
Page 3 of 20
For further information on
ground source heat pumps and
their application, please refer to
www.kensaengineering.com
1. Introduction—a message rom the Managing Director
Thank you for choosing a ensa Shoebox ground source heat pump for your
project. ensa Engineering has been manufacturing ground source heat
pumps since 1999 and have significant experience in providing heat pump
systems in domestic and commercial applications.
Your ensa heat pump will provide you with many years of low energy bills
and maintenance free running while also reducing your carbon footprint.
ensa Shoebox heat pumps are designed for ease of operation and once set by your installer to provide
the optimum flow temperature for your heating system should not require adjusting.
The purpose of this manual is to guide you through the operational aspects of living with a heat pump.
Finally, please feel free to contact ensa should you have any questions, 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
ensa Engineering Ltd
Fault Finding Operational Instructions General product information Safety information Introduction Warranty
Shoebox Heat Pump Operational Manual Version 1
Page 4 of 20
2. Sa ety in ormation
Safe operation of this unit can only be guaranteed if it is properly installed and commissioned in
compliance with the operating instructions. General installation and safety instructions for pipeline and
plant construction, as well as the proper use of tools and safety equipment must also be complied with.
Manufacturer:-
ensa Engineering
Mount Wellington
Chacewater
Truro
Cornwall
TR4 8RJ
Tel 01872 862140
www.kensaengineering.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 Installation
and Operation Instructions, could cause damage to the product, will invalidate the warranty, and may
cause injury or fatality to personnel.
2.1 Disposal/Decommissioning
ensa offer a life time decommissioning service for this product. This is available on a return to base basis
(carriage at users cost).
Disposal of any antifreeze water mix should follow the disposal instructions as laid out on the COSH Safety
Data Sheet in the Installation Manual.
2.2 Returning products
Customers and stockists are reminded that under EC Health, Safety and Environment Law, when returning
products to ensa Engineering they must provide information on any hazards and the precautions to be
taken due to contamination residues or mechanical damage which may present a health, safety or
environmental risk. This information must be provided in writing including Health and Safety data sheets
relating to any substances identified as hazardous or potentially hazardous.
Safety information
General product information
Operational Instructions Fault Finding Warranty Introduction
Shoebox Heat Pump Operational Manual Version 1
Page 5 of 20
3. General Product In ormation
This manual explains how to operate a ensa Shoebox ground source heat pump.
3.1 Kensa Engineering
ensa Engineering is the leading U manufacturer of a full range of ground source heat pumps. ensa
provides exceptional levels of expertise and advice on the use, design and application of heat pumps.
ensa have been active 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 two thousand heat pumps of various types
throughout Europe and manufacture ranges suitable for the domestic market and specifically designed for
commercial applications.
ensa are ISO9001 approved for the design and manufacture of heat pumps and hold an unique status as
being accredited by Microgeneration Certification Scheme for both the manufacture and installation of
ground source heat pumps. ensa were also a founding member of the Ground Source Heat Pump
Association and play a major role in helping to raise the profile of heat pumps and formulate Industry
Standards.
ensa’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 description
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 heating distribution 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 heating system.
Fig 1. Heat pump Schematic
Fault Finding Operational Instructions General product information Safety information Introduction Warranty
Shoebox Heat Pump Operational Manual Version 1
Page 6 of 20
A ground source heat pump (GSHP) extracts heat from the ground by circulating a cold solution of water
and antifreeze (brine) around pipes buried in the ground. As these pipes are buried below 1m in depth,
where the temperature of the ground remains pretty constant (8 to 10oC), heat is absorbed from the
ground into the fluid (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 flows around a second heat exchanger (called a
condenser) with the heating distribution fluid passing through the other side of the heat exchanger.
Energy is then transferred from the refrigerant into the heating distribution system; this in turn causes the
refrigerant to condense.
This high pressure cold refrigerant is then passed through an expansion valve (or throttle) and the
pressure is reduced. The whole cycle is then repeated.
GSHPs are an extremely energy efficient technology, with every unit of electricity used (to drive the
pumps and compressor) producing between 3 and 4 units of heat.
The ensa ’shoebox’ heat pump is designed to provide a low cost renewable heat source for a buildings
heating system. It is ideally suited to multi flat developments using a communal ground borehole field. In
addition, and if required, the ensa Shoebox can also provide domestic hot water. Heat pumps can provide
lower running costs and will generate significantly lower carbon emissions compared with traditional fossil
fuels.
Safety information
General product information
Operational Instructions Fault Finding Warranty Introduction
Fig 2. A shoebox heat pump
Shoebox Heat Pump Operational Manual Version 1
Page of 20
Fig 3. A shoebox heat pump
Fault Finding Operational Instructions General product information Safety information Introduction Warranty
Fig 4. The internals of a shoebox heat pump
Compressor
Ground Array Water
Pump
Shoebox Heat Pump Operational Manual Version 1
Page 8 of 20
Safety information
General product information
Operational Instructions Fault Finding Warranty Introduction
This page is intentional left blank
Shoebox Heat Pump Operational Manual Version 1
Page 9 of 20
Fault Finding Operational Instructions General product information Safety information Introduction Warranty
3.3 Kensa Shoebox Technical Details—Single Compressor
Nominal
Thermal
Output
Power
supply
rating
Max
running
Current
Typical
running
current
Typical
starting
current
Power
supply
cable cross
sectional
area (min)
Power
input*
Nominal dry
weight
Compressors Dimensions Connection size Recommended
minimum heat
transfer area in
DHW tank (not
supplied)
kW Amps Amps Amps Amps mm2 kW g Number HxWxD mm OD m2
Single Phase—230 Volts AC 50 Hz
3.0 13 7 4 30 2.5 0.8 44 Single 530x465x370 3/4” BSP
Parallel
0.75
The figures above are based on a rating to BS EN14511, 0 deg C from the ground, 35 deg C flow to underfloor..
* This figure includes the power consumption of the inbuilt water pump
For clarification of starting currents and details on how these figures are calculated please contact ensa.
Shoebox Heat Pump Operational Manual Version 1
Page 10 of 20
4. Operational Instructions
Always ensure that individuals using the appliance have read and fully understood the Operation
instructions.
Do not operate the appliance with the cover removed.
Do not operate the appliance in anything other than dry conditions.
Do not exert any strain on electrical or pipe connections 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 iciency o the heat pump.
In order to increase the efficiency 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 time of the heat pump and hence energy costs.
2. The lower the flow temperature from the heat pump the higher the efficiency so consider a heating
system with a large heat emitting area such as underfloor.
3. If in a well insulated building with underfloor mounted in screed throughout, consider running your
heat pump on off-peak electricity tariffs such as Economy 10.
4. With underfloor systems, avoid the use of insulative coverings such as thick carpets and wooden
floors.
5. Consider the use of Solar Thermal for the production of the majority of DHW.
4.2 Display
Each heat pump has a dedicated display which can be interrogated to view various parameters, alter the
heat pump outlet flow temperature and indicate faults/alarms.
Safety information
General product information
Operational Instructions Fault Finding Warranty Introduction
1. Floor return
temperature
2.Heating
symbol
3.Compressor
number
3.Compressor
run symbol
n.b. the numbers above refer to the points below.
Fig 5 Heat Pump isplay