Technical and Specification Information Greensource air to water heat pump series Greensource air to water heat pump series Building Regulation G3 compliant Worcester, Bosch Group Technical Help line Worcester and you. Making a difference. Working together for many years, heating Contents Page We’re a leading British company, “At Worcester we recognise the vital role professionals and Worcester have been employing more than 1,800 people at our you, our customer, has in the specification The Greensource air to water heat pump series 4-9 making a real difference in hundreds of headquarters and manufacturing plants in and installation of ‘A’ rated, energy efficient The inside story 10 - 11 thousands of homes across the UK. We are Worcester and at Clay Cross in Derbyshire, appliances in homes across the UK. We will Technical data 12 - 13 recognised as a market leader in high including a nationwide network of over 300 continue to invest in our products, people, Installing Greensource air to water heat pumps 14 - 15 efficiency, condensing boiler technology Service Engineers and over 80 technically- facilities and added value services such as Installation requirements 16 - 17 and are also committed to providing trained Field Sales Managers. training, to give you the support you require FAQs 20 - 21 in providing a total solution for your Greensource air to water heat pump range customers’ comfort.” and accessories 22 Worcester training 23 - 25 After-sales 26 renewable energy solutions. As part of Europe’s largest supplier of As part of the Bosch Group, our products heating products, Worcester, Bosch Group are designed and manufactured to provide has the UK-based resources and support Richard Soper, the high levels of quality and reliability capability to offer you the value-added Managing Director, Worcester, Bosch Group which are synonymous with the Bosch solutions we feel you deserve. name throughout the world. 2 3 The Greensource air to water heat pump series Advanced renewable energy technology from Worcester that’s Worcester, Bosch Group has taken the lead in developing leading the way to a greener and more sustainable future. heating and hot water solutions which reduce the impact How Greensource air to water heat pumps distribute heat 20ºC 22ºC 20ºC on the environment by reducing harmful CO2 emissions, As part of the Bosch group, Worcester is committed to while continuing to satisfy the daily demand for domestic environmental protection. Product development is prioritised heating and hot water comfort – not only for today, in the interests of people’s safety, the economical use of but well into the future. resources and environmental sustainability. Hot water to baths, showers and basins etc With this in mind, Worcester is proud to offer a range of G3 In just a few short years, Britain’s domestic heating compliant air to water heat pumps which allow the consumer to take advantage of renewable and sustainable energy. With approximately 25% of the UK’s carbon dioxide As well as being fuelled by the free and inexhaustible 18ºC Hot water piping for radiators Greensource air to water heat pump and hot water industry has changed dramatically. 22ºC Hot water distribution unit Buffer storage tank 20ºC 20ºC INDOOR UNIT FEEDS WARM WATER TO UNDERFLOOR HEATING AND/OR OVERSIZED RADIATORS OUTDOOR UNIT Underfloor heating The Greensource air to water heat pump range at a glance emissions being produced by home energy consumption, supply of latent energy, Worcester air source heat pumps 75% of which is for the provision of heating and hot water, offer additional advantages including simple and cost- such change has been not only inevitable but crucial. effective installation, suitability for a wide variety of property types and sizes and, at a time when fuel costs Words and expressions such as “renewable energy”, Outdoor unit 6kW Dimensions w x h* x d of melting polar ice caps. 9.5kW 818 x 1,223 x 643mm 818 x 1,223 x 643mm 818 x 1,223 x 643mm 140kg 144kg Outer casing The appliance is dispatched complete with comprehensive installation, maintenance and user instructions. Emitted/supplied output at +7/35ºC** Dimensions wxhxd Weight without water 122kg Galvanised powder coated steel Weight with water 347kg 5.5/1.5kW 7.2/2.2kW 8.4/2.5kW Output of electric electric heater 4.5kW CoP -7/35ºC** 2.0 2.3 2.3 CoP 2/35ºC** 3.2 2.8 3.0 DHW volume Please note that this leaflet only provides a guide to CH volume installation and the features and benefits of the product. CoP 7/35ºC** 3.7 3.3 3.4 0.19 0.29 0.34 For full details please refer to the installation and commissioning instructions. We recommend that you attend our training course to gain knowledge on the Heat carrier flow nominal (l/s) I.P. rating x4 x4 best methods for installing our Greensource air to water heat pumps prior to fitting this appliance. 4 600 x 1,660 x 615mm 152kg their heating and hot water bills. become part of everyday conversation and have been fuelled by extreme weather and stark television images 7kW are rising, the chance to help your customers reduce Weight “sustainable technology” and “carbon footprint” have Indoor hot water distribution unit x4 Power consumption of circulation pump Mains electrical voltage I.P. rating 151 litres 55 litres 0.2kW 1 x 230V N AC 50Hz x4 *Without feet, additionally depending on the adjustment min. 20mm – max. 30mm. **Output data according to EN 14511 European Standards. CoPs are calculated using EN 14511. 5 The Greensource air to water heat pump series Features Benefits Scroll compressor Flow temperatures up to 65ºC Low noise output Quiet operation Worcester heat pumps make use of the latent energy from The system comprises an external energy collector and an 2 years parts and labour guarantee* Peace of mind the outside air by converting it into heat which can be used internal Building Regulation G3 compliant heating and hot No flue system Ease of siting with a typical wet heating and hot water system. water distribution unit with a hot water store and heat No gas or oil required Ease of siting The heat pumps use the constant energy available in the air alternatively to oversized radiators. delivery system, preferably to underfloor heating or Automatic defrost, -20ºC outside operation Melts snow and ice automatically Fast and easy installation Through offering a complete system with indoor and outdoor unit with a refrigerant circuit to allow the temperatures to be 65°C water temperature – wide application range Worcester air to water heat pumps are intended to be the water for the home. sole source of heating and hot water production for the More retrofit installations possible e.g. connection to radiators Compact size 600mm2 internal hot water distribution unit Fully integrated controls Easy operation Integrated stainless steel cylinder Space saving and corrosion resistant Fully integrated circulation pumps Quicker installation and no need to purchase additional components Built-in expansion vessels boosted to a useful level for the provision of heating or hot home, giving the homeowner the option of removing the existing heat source from the property. Principles of operation – how an air to water heat pump works Hot water Blending valve*** Quicker installation and no need to purchase additional components Diverter valves Quicker installation and no need to purchase additional components Inlet control set† No need to purchase additional component Note: The heating system should be designed to maintain 70% of the nominal flow of the system across the heat pump at all times. Cold water (North facing wall) Underfloor heating systems should have at least half of the coils fully open at all times. Hot water Outdoor sensor Alternatively, or where TRVs are used, a by-pass may be fitted. This must still maintain 40% of the nominal flow across the heat pump. Hot water sensor PLEASE NOTE outside pipes should be insulated class O standard. Electric element *Terms and conditions apply †Supplied in unvented kit 3 way valve Where it is not possible, due to the design of the heat emitters, to maintain this flow rate a Worcester primary store of around 100 litres should be fitted. See diagram on page 16. Heating water Mixing valve Floor heating Flow sensor *Recommended isolation valve 45ºC 3 way valve Isolation valves* **Filter valve fitted on return Radiator Heating water 36ºC ***A blending valve is supplied as standard Filter valve on return** Air to water heat pump (Outdoor unit) and should be fitted prior DHW outlet Hot water distribution unit (Indoor unit) Fan-assisted convector heaters In the outdoor unit the refrigerant meets the outdoor air in The drying filter is used to collect any moisture in the the evaporator (heat exchanger). The air is drawn through system. After the filter, the refrigerant passes through the evaporator by a fan located on top of the heat pump. a sight glass. The refrigerant, which is in a liquid state absorbs free energy from the air and evaporates in this process. A sensor The sight glass is used to check the level in the system. in the expansion valve ensures that the liquid refrigerant There should be no bubbles in the sight glass during normal collects the correct amount of the “free energy” before the operations. However, there might be bubbles when the refrigerant (now in a gas state) is led into the compressor. heat pump is started and stopped or during defrosting. After the sight glass, the refrigerant continues on to an The compressor increases the pressure of the refrigerant. expansion valve. The temperature of the vapour reaches approximately 100°C. The warm gas is then led into the condenser. The refrigerant pressure is lowered in the expansion valve. The condenser is the heat pump’s heat emitting part. In refrigerant has left the valve and passes the evaporator the condenser, which is a fully brazed heat exchanger in it changes to vapour again. This completes the refrigerant stainless steel, the refrigerant (gas state) meets the water circuit. The expansion valve is equipped with a sensor This also causes the temperature to drop. When the from the heating system (radiators and/or floor coils). (bulb) just before the compressor. The sensor controls When the warm gas is cooled by the circulating heating the amount of fluid entering the evaporator. water, it changes into a liquid state (condenses). Energy is emitted in this process to the heating system or the hot water. After the condenser, the refrigerant, which is now in Hot water distribution unit Outdoor unit liquid form, continues through a drying filter. 6 7 Worcester offers a choice of 3 air to water heat pumps The table below shows the relationship between flow Curve slope settings: (6kW, 7kW and 9.5kW) which are intended to provide all temperature and CoP. The CoP stated is for use only as The unit is already factory preset, however you can adjust Working temperatures the heating and hot water requirements of the home. typical examples and will differ between installations. the heat curve to a level for the heating system to suit your Maximum working temperatures property type. The heat pump can work with a maximum return Relationship between flow temperature and CoP Performance Greensource air to water heat pumps feature a highly Heat delivery method efficient and effective scroll-type compressor which allows Radiators around 65ºC flow temperature from the appliance. This Typical CoP Flow temperature Underfloor heating 3 40 - 50ºC 4-5 30 - 40ºC higher output temperature allows Greensource heat pumps temperature of approximately 59°C. If the temperature rises above this value the heat pump will automatically stop. Weather compensation control method If the outdoor temperature drops, the flow temperature increases. If the outdoor temperature increases, the flow Minimum working temperatures temperature drops. The heat pump is designed to stop if the outdoor temperature falls below -20°C. Supporting additional to be effectively combined with radiators which should be heat could be produced by the additional elective heater sized correctly. However, wherever possible, Worcester Operation of the heat pump and heating and hot water recommends an underfloor heating system as the most distribution unit 65 compatible heat emitter system. The scroll compressor The control unit uses two different methods to control the 60 heat pump. 55 allows Greensource heat pumps to offer excellent Heating system flow temperature (ºC) CoP ratings. Control with outdoor sensor from temperatures below -3ºC. The heat pump re-starts automatically when the outdoor temperature climbs r ate he al c i r ct Ele p p um Heat 50 45 above -20°C. ºC /45 55 ºC 8/32 tem em 3 Sys Syst 40 Defrosting the heat pump The principle of defrosting in the heat pump is known as Coefficient of Performance A sensor is installed outside on a north facing wall of the 35 The performance and efficiency of an air source heat property. Control with an outdoor sensor means that the 30 hot gas defrosting. During defrosting, the flow in the pump system is commonly measured by the Coefficient heat pump automatically regulates the heating in the house 25 refrigerant circuit is reversed by means of an electrically- of Performance (CoP). The CoP is a simple calculation depending on the outdoor temperature. If the outdoor 20 15 10 5 0 -5 -10 -15 -20 -25 Outdoor temperature (ºC) controlled four-way valve. The compressed gas from the compressor is fed into the top of the evaporator, causing which works out how much energy the heat pump is able temperature drops, the underfloor heating/radiators inside to extract from the energy source compared to the amount the house will become warmer. Heat curve the ice on the outside to melt. During this process, the The user determines the response from the heat pump in Controls evaporator and a sensor ensures that the process functions heating water is cooled slightly. Hot gas is sprayed into the of electrical energy used by heat pump. Heat output of system (useful heat) relation to the outdoor temperature, with the help of a Greensource air to water heat pumps are controlled by a correctly. The time required for defrosting depends on the number of settings such as selecting the heat curve on the Rego 800 control unit. The unit ensures that the heat amount of ice and the outdoor temperature. This also acts control unit. pump works efficiently when required and dictates that as a fan defrost function, which blows hot air upwards the hot water heating is given priority over space heating. through the fan to prevent it freezing solid. CoP = Electrical input from compressor and circulating pumps E.g.: 9kW heat pump Control with outdoor sensor supplemented with The control unit has a simple main “Menu” and room sensor “Advanced Menu”. Greensource air to water components list 1 x tundish factory fitted 22mm x 1" Control with an outdoor sensor supplemented with a room CoP of 3.3 = 2.7kW of electrical input 1 x tundish 15mm x 22mm sensor means that a sensor can be placed in a reference ON/OFF LED position inside the house. This is connected to the heat The CoP depends on the temperature that can be extracted pump and provides the control unit with information about from the outdoor unit and the temperature required by the the room temperature. The signals affect the control unit’s heating system of the house. The best combination for a settings (heat curves) and ensure the heat pump gives the high CoP would be a higher source temperature (e.g. 10ºC) best possible energy savings. 1 x circlip pliers 2 x flexible connection hoses Menu window Menu dial 1 x particle filter valve 2 x indoor/outdoor sensors with cable 1 x unvented kit and a lower flow temperature for the heating (e.g. 35ºC). The return on the energy employed in this case is higher The heat curve slope can be changed to increase or since the heat pump has to increase the temperature by decrease the heating in the house. Switch (ON/OFF) 1 x hot water blending valve 1 x 32mm (11/4") universal waste fitting 1 x heating system filling loop only 25ºC. If the energy from the source is lower in temperature and the required flow temperature is higher 4 x rubber feet Emitted output air/water 1 x user guide (heat pump) 1 x user guide (heating and hot water distribution unit) the CoP will be reduced. 1 x installation manual and guarantee card 10 The equation shown results in 2.7kW of heat provided by 8 the pump (which is provided by electrical consumption) and 6.3kW of energy extracted from the atmosphere. Emitted output (kW) Compressor Fan Air/water 7kW 6 Electrical heater Hot water mode Hot water peak Electrical isolation Note: Both the indoor and outdoor units require a means of Electricity electrical isolation. It is recommended that the outdoor and 4 indoor units are supplied by an aM type fuse or a C and D Heat pump characteristic McB. 2 Extra hot water 20 15 10 5 0 -5 -10 Outdoor temperature (ºC) 8 -15 -20 Heating system mode Alarm Holiday mode -25 Greensource air to water heat pump control panel 9 Inside story – Greensource heat pump outdoor unit Inside story – Greensource heating and hot water distribution unit Temperature and pressure relief valves (factory fitted) System pressure relief valve (factory fitted) REGO 800 control panel Low pressure switch Manual air vent Sight glass Four-way valve Expansion valve Condenser Non-return valve Drying filter Mixing valve Heat carrier pump (G2) High pressure switch Service connection Service connection Compressor Pressure gauge Drain valve Pump for heating system (G1) Non-return valve Three-way valve (hot water) Three-way valve (heating) Note: An unvented kit, which includes a filling loop, blending valve, a 19 litre expansion vessel and hose, inlet control set, 15mm x 22mm tundish and waste coupler is supplied with each unit. 10 11 Technical data – Greensource air to water heat pump outdoor unit Model Technical data – Greensource indoor hot water distribution unit Greensource air to water Greensource air to water Greensource air to water heat pump 7kW heat pump 9.5kW heat pump 6kW Dimensions w x h x d (mm)* Weight (kg) Outer casing 818 x 1,223 x 643 818 x 1,223 x 643 818 x 1,223 x 643 140 144 152 Galvanised powder coated steel Galvanised powder coated steel Galvanised powder coated steel Model Greensource heating and hot water distribution unit Dimensions w x h x d (mm)* 600 x 1,660 x 615 Weight without water (kg) 122 Weight with water (kg) 347 Emitted/supplied output at +7/35ºC 5.5/1.5 7.2/2.2 8.4/2.5 Output of electric heater (kW) 4.5 Heat output / CoP -7/35ºC1 2.8/2.0 5.0/2.3 5.6/2.3 Power consumption of circulation pump (kW) 0.2 Heat output / CoP 2/35ºC1 4.6/3.2 6.1/2.8 7.1/3.0 Mains electrical voltage Heat output / CoP 7/35ºC1 5.5/3.7 7.2/3.3 8.4/3.4 Fuse rating** (Amps) 25 0.19 0.29 0.34 Maximal power consumption (kW) 4.7 5 6 7 2,200 2,200 2,200 0.44 0.44 0.44 16 25 25 23.43 30.56 32.05 230V 1N ~ 50Hz 230V 1N ~ 50Hz 230V 1N ~ 50Hz Scroll Scroll Scroll FV 50S FV 50S FV 50S 65 65 65 Heating system flow nominal (l/s) Internal pressure drop heat carrier (kPa) Air flow (m3/h) Electrical consumption fan (A) Fuse size – Amperes time delay4 Starting current – softstart (A) Electrical supply Compressor Compressor oil Maximum outgoing flow Maximum working pressure Volume DHW cylinder/Primary water (litres) HTF connection, clamping ring (mm) Wilo Star RS 25/6-3 Heating fluid pump G2 Wilo Star RS 25/6-3 * Without feet, additionally depending on the adjustment min. 20mm – max. 30mm. ** aM type fuse D characteristic type McB means of electrical isolation required. Heat pump data 2.5 2.6 2.95 Hot gas with four-way valve Hot gas with four-way valve Hot gas with four-way valve -20 to +35 -20 to +35 -20 to +35 Hose 1" internal thread Hose 1" internal thread Hose 1" internal thread 65 65 65 53 53 53 x4 x4 x4 Standard compliance Complies with technical requirements Harmonics standard compliance Stages Sound power level2 (dB(A)) Sound pressure I.P. rating level3 (dB(A)) 12 Pump for the heating system G1 Rating or aggregate rating (Amps) Operating temperature5 (ºC) 151/55 Expansion vessel size (litres) Model Defrost system 2.5bar (0.25MPa) Heat pump system temperature (ºC) Refrigerant filling R-407C (kg) 230V IN - 50Hz AC * Without feet, additionally depending on the adjustment min. 20mm – max. 30mm. 1 Output data at +7/35ºC, +7/45ºC are stated according to the European Standard EN 14511. 2 Calculated value at 1m distance according to EN ISO 3743-2. 3 Calculated value at 1m distance according to EN ISO 11203. 4 aM type fuse, C characteristic McB. 5 Tested at -17ºC according to the European standard EN 14511-4. CoPs are calculated using EN 14511. Time delay between stages Greensource air to water Greensource air to water Greensource air to water heat pump 6kW heat pump 7kW heat pump 9.5kW 50 63 63 BS EN 61000-3-11 BS EN 61000-3-11 BS EN 61000-3-11 – – BS EN 61000-3-3 BS EN 61000-3-12 BS EN 61000-3-12 BS EN 61000-3-12 3 x 3kW 3 x 3kW 3 x 3kW 20 min ramp up 0 - 100% 20 min ramp up 0 - 100% 20 min ramp up 0 - 100% Heat pump compressor Model Greensource air to water Greensource air to water Greensource air to water heat pump 6kW heat pump 7kW heat pump 9.5kW Rating or aggregate rating (kW) 1.94 1.94 2.99 Maximum starting current (Amps) 22.9 23.8 30.9 Minimum time between starts (minutes) Compressor method of starting Starting power factor 30 30 30 Electronic soft start Electronic soft start Electronic soft start 0.30 0.30 0.30 Additional heating elements Model Aggregate rating (kW) Stages Time delay between stages 12 Greensource air to water Greensource air to water Greensource air to water heat pump 6kW heat pump 7kW heat pump 9.5kW 4.5 4.5 4.5 1.5kW x 3 1.5kW x 3 1.5kW x 3 20 min ramp up 0 - 100% 20 min ramp up 0 - 100% 20 min ramp up 0 - 100% 13 Installing the Greensource air to water heat pump Siting of the heating and hot water distribution unit Hot water distribution connection layout 29.50 Installation clearances A minimum of 600mm is required in front of the unit. The Top view other sides can be blocked. A minimum of 25mm is required Installation clearances between the unit and other permanent installations e.g. Siting of the outdoor unit Min. 1,500mm solid base, e.g. concrete slabs*. The heat pump should be walls, sinks, etc. Wall Min. 300mm Min. 1,000mm 558 The heat pump is located outdoors and contains a number of sensitive parts. It is important that it is stood on a flat, Min. 500mm DHW Expansion vessel positioned at least 300mm from the building into which it connects with the internal heating and hot water distribution unit. The internal heating and hot water distribution unit should be located as close as possible to the heat pump and the outdoor connecting pipes should be suitably insulated Front view with Class O insulation to prevent freezing and the fluid dosed with inhibitor and antifreeze. Min. 25mm Min. 600mm Inlet control set Outdoor unit clearances The heat pump will produce between 15 - 25 litres of Minimum distance from pump to wall (mm) 300 Wall condensation per day, depending on external temperatures, and this should be diverted to a mains drain or a soak away. Minimum distance in front of pump (mm) In order to prevent freezing the condensate pipe must be Minimum distance to the side (mm) insulated and the drainage pipe must slope towards a drain. Minimum distance above (mm) 1,000 Heating and hot water distribution unit Insulated wall 500 1,500 The outdoor unit must be installed at least 2,000mm below The outdoor heat pump can be sited up to 15 metres from Front The inlet control set supplied should be mounted externally in line with G3 regulations. Min. space 1,240mm a roof to avoid the recirculation of cold air. the property using 19mm thick Class O pre-insulated plastic pipe available from: Outdoor unit casing dimensions and pipework connections Watts Industries UK Ltd, Side Front Heating and hot water distribution unit pipework connections Grosvenor Business Park, The return is connected to the inlet marked ‘return flow’. Connection area seen from behind Evesham, Cold water and hot water are connected to inlets marked Heat pump top connection Worcestershire WR11 1GA Return to heat pump ‘cold water’ and ‘hot water’. Heating system top connection Tel: 01386 446997 1,223mm 5 Pipework dimensions Heating and hot water distribution unit pipework dimensions Flow from heat pump 60mm 818mm 643mm Heating system return Heating system flow Cold mains in Hot water out (taps) Heating flow and return The unit can be connected either from the top or from the rear connections. Back Connection size Condensate drain 22mm dia. Hot and cold water The purpose of the particle filter valve is to filter out Electrical cable entry Connection size 22mm dia. Flow to indoor unit Return from indoor unit To/from connections 201 165 101 Connection size 6 105 220 supplied particle filter valve should always be fitted on 22mm dia. (in HWDU) 28mm dia. (in heat pump) Floor preparation Waste water/drainage 32mm dia. (in both) All connections must be made using the sizes listed above. The following connections are made to the heat pump: A 32mm plastic pipe is taken from the drainage pipe to and be horizontal. From heat pump 411 The flow is connected to the inlet marked ‘forward flow’. the return pipe between the indoor and outdoor unit. It should be fitted as close to the heat pump as possible To indoor unit Connection size dirt before it can enter the heat pump. Accordingly, the The appliance is designed to be free standing and should be located on a flat surface which is able to support the weight of the product, accessories and fluid content. The appliance has rubber feet which can be adjusted to suit the installation. the drain. 14 *Rubber matting can be used directly under the heat pump as a sound proofing method if required. 15 Installation requirements The following examples are for demonstration purposes only: Maintenance on the outdoor heat pump The outdoor heat pump unit should be checked regularly for An air source heat pump is typically sized to provide around leaves and debris, especially on the evaporation fins and Alternatively, or where TRVs are used a by-pass may be 85% of the peak load of the house on the coldest day. Since water tray. These must only be cleaned using a watering can The heating system should be designed to maintain 70% fitted. This must still maintain 40% of the nominal flow the number of days in a year that this requirement occurs is with a rose and a soft cloth to prevent damage. of the nominal flow of the system across the heat pump across the heat pump. relatively low, the heat pump is typically sized to provide System design requirements 95% of the total heating requirement for a property over the Maintenance on the indoor unit Where it is not possible, due to the design of the heat year. The remaining energy is provided by the built-in This should be serviced annually in accordance with G3 Underfloor heating systems should have at least half of the emitters, to maintain this flow rate a Worcester primary electrical heater. requirements. coils fully open at all times. store of around 100 litres should be fitted. The benefit of sizing the heat pumps below the peak load Spare parts requirement is that the pump, for the majority of the year, is Only genuine Worcester, Bosch Group spare parts can be able to remain on and deliver a ‘trickle charge’ of heat to the used with these products. at all times. Expansion vessel property, rather than being oversized and constantly cycling (North facing wall) Heating system return Heating system flow Air temperature sensor in and out of operation. This helps the heat pump to offer Standards better efficiency. The installation of the Worcester Greensource air to water heat pump system must be carried out in accordance with Circulation pump Wall Heating and hot water distribution unit Isolation valves* Primary store There are significant climatic differences across the UK and the relevant requirements for safety, current Wiring this should be taken into consideration when sizing the heat Regulations, local Building Regulations, Building Standards pump. The Worcester system design service is able to (Scotland), (Consolidation) Regulations and Bylaws of the provide information on an individual basis. Heating system return Heating system flow local water company and Health and Safety document No. 63S (Electricity at Work Regulations 1989). It should be in For more information on the suitability of heat pumps for accordance with the relevant recommendations of the your home visit www.worcester-bosch.co.uk. following British Standards and Regulations: Communication cable CoPs are calculated using EN 14511 which includes the In the control unit the different circuit boards are connected compressor and all pumps. Flow Hot water out (taps) Cold mains in Heat pump Return PLEASE NOTE outside pipes should be insulated class O standard. Blending valve*** Filter valve on return** *Recommended isolation valve **Filter valve fitted on return ***Blending valve fitted to DHW pipe by a data communications cable (CANbus). This cable is NOT SUPPLIED by Worcester, Bosch Group. A cable similar BS EN 378 to CAT 5 E FTP 2 x 2 x 0.5 screened CANbus can be used. Refrigerating systems and heat pumps. Safety and System layout environmental requirements. CANbus cable must be a twisted pair, screened and earthed. The heat pump is a part of the heating system. Faults in the Maximum cable length is 20 metres. CANbus cables MUST Care should be taken to avoid excessive use of flux on heat pump can be caused by poor water quality in the NOT be laid alongside power cables. copper pipe connections to minimise the amount of debris radiators or underfloor coils or because air is penetrating Connecting the heat pump to the heating system and blocking of the filter. The Health and Safety at Work Act 1974 The Management of Health and Safety at Work the system continuously. Oxygen causes corrosion products Warning: These connections must not be mixed up. If 12 in the form of magnetite and sediment. This is detrimental volts are supplied on either CANL or CANH the processors System flushing and care to the heat pump components and reduces their working may result in damage. The four cables should be attached on The Construction (Health, Safety and Welfare) Central heating systems must be flushed before the heat life. Existing heating systems which require regular filling or contacts with corresponding marking on the Greensource Regulations 1996 pump is installed. The system should be prepared in where the heating water is not clear when drained, require air to water heat pump and the heating and hot water accordance with the guidelines of BS 7593 : 2006. cleaning and flushing before the installation of a heat pump, distribution unit. The filter on the primary circuit should be checked and vents. for example the heating system must be fitted with filters Regulations 1999 The Construction (Design and Management) Regulations 1994 Dip switch S1 All CANbus pcbs should be connected in series and the dip The Lifting Operations and Lifting Equipment Regulations Heat pump sizing switch marks the beginning and the end of a CANbus net. 1998, and any other relevant regulations in force at this time. Although the sizing of the heat pump can only be accurately Therefore, the dip switch on the HWDU display and on the It is important that all previously mentioned preparations carried out by taking all factors into consideration, this heat pump must be in the ‘TERM’ position. All others must The manufacturer’s notes must not be taken in any way as have been carried out before the heat pump is connected to section offers some explanation of the principles behind be in the opposite position (not terminated). overriding statutory regulations. during the first week of operation to ensure that any debris is removed. the heating system. Also ensure the pipe system has been the sizing of heat pump according to the energy well flushed before it is connected to the heat pump. requirement of the property. Flushing protects the heat pump from contamination. Refrigerants The Worcester Greensource air to water heat pump system uses R407c pre-charged refrigerant. 16 17 The Code for Sustainable Homes Why we need a Code for Sustainable Homes Carbon emissions from domestic properties have to be The benefits of the Code reduced – a fact highlighted by statistics for 2004 which • How the Code works Apart from these minimum requirements the Code is The Code measures a home’s sustainability against completely flexible, allowing developers to choose which show that 73% of domestic CO2 emissions are produced by For the environment the benefits include: these 9 design categories, rating the ‘whole home’ and how many standards they implement to achieve a the provision of heating and hot water. • reduced carbon dioxide emissions (a major cause of as a complete package: higher sustainability rating climate change) • energy and CO2 • materials • waste • health and well-being • ecology cooking 5% Average UK household CO2 emissions breakdown Source: DEFRA • better adaptation to climate change through measures such as improved water efficiency and management, lights & appliances 22% household recycling and the use of less-polluting • water • surface water run-off • pollution • management • Flexibility of the Code materials. Categories Flexibility The Code’s rating system uses stars to indicate a Energy/CO2 Minimum standards at each level of the Code For new home builders the benefits include: home’s overall sustainability performance across Water • the 9 design categories Materials • space heating 53% water heating 20% satisfying the growing demand for new homes which are both more sustainable and more economical to run • • demonstrating the degree of this sustainability through the star rating new homes The purpose of the Code is of the building regulations, and 6 reflecting exemplary standards in sustainability terms Management • minimum requirements. For social housing providers the benefits include: • No minimum standards There are minimum standards for some categories, and finding innovative solutions to exceeding the Code’s to act as new single national standard for key elements of • an opportunity to build future housing stock that meets Pollution Health and well-being these must be achieved to gain a 1-star sustainability rating • design and construction of sustainable homes 1 being the lowest (entry level) rating but above the level Ecology to reduce domestic CO2 emissions. • Waste A home can achieve a rating of from 1 to 6 stars – • establishing a competitive edge over lower-rated Sustainable Homes, a major initiative which is designed Minimum standards at Code entry level Surface water run-off Worcester Greensource air to water heat pumps comply with the requirements for the Government's Code for The table below shows the 9 design categories and the degree of flexibility offered by each: • To achieve a particular Code level and the associated sustainability rating, a home must integrate minimum • Energy efficiency and water efficiency, vital to the standards and attain additional points for other design sustainability of any home, also have minimum standards features. The table below shows the minimum standards that must be achieved at every Code level and credits awarded to achieve each Code level. lower running costs (through greater energy and water efficiency) Britain’s needs and protects the environment • enhanced comfort and increased tenant satisfaction Achieving a sustainable rating (minimum standards) Energy • to act as a means of ensuring continuous improvement, greater innovation and exemplary achievement in • continuing to meet or exceed the standards for funding. Code Level For tenants and homeowners the benefits include: • reducing their own environmental footprint Improvement over 2010 TER Credits awarded for Ene 1 Maximum standards in indoor water consumption (Ltrs per person per day) Credits awarded Other credits required 1(★) Part L 2010 compliant 0 120 1.5 33.3 2(★★) Part L 2010 compliant 0 120 1.5 43.0 3(★★★) Part L 2010 compliant 0 105 4.5 46.7 25% 3 105 4.5 54.1 9 80 7.5 60.1 10 80 7.5 64.9 sustainable home building • to provide a standard which builds on the successful EcoHomes System devised by the BRE (Building Research Establishment). • enjoying lower running costs through greater energy and water efficiency than homes not built to Code standards 4(★★★★) 5(★★★★★) 6(★★★★★★) • benefits such as more natural light and other features and standards which enhance feelings of well-being which result in a more pleasant, healthier, living environment. 18 Water 1 100% 2 Net zero CO2 emissions 1. Zero emissions in relation to Building Regulations issues (i.e. zero emissions from heating, hot water, ventilation and lighting). 2. A completely zero carbon home (i.e. zero net emissions of carbon dioxide (CO2) from all energy use in the home). All points are rounded to one decimal place. 19 Frequently asked questions What benefits do air to water heat pumps offer over ground The technician should then turn the unit on and check that: Can you combine radiators and underfloor heating source heat pumps? • • the water pump is free and operating properly • the unit’s fan is operating • that the unit is increasing the water to the correct when using an air to water heat pump? There are significant benefits – lower installation costs – no need to dig trenches or boreholes. The Greensource air to water heat pump is a self contained unit that simply needs connecting to the mains electricity supply and the the controls are operating properly operating temperature. building’s wet heating system. They also take up much less Renewable Heat Incentive (RHI) Yes you can. However, the heat pump return water Is there any Government funding to help with the cost of temperature should be set for a radiator system at the installing an air to water heat pump? higher return temperature and a mixing valve should be The UK Government’s Renewable Heat Incentive Premium fitted to reduce the water temperature for the underfloor Payment scheme (RHIPP) is designed to encourage heating part of the system. people to install renewable technologies. From 1st August 2011 to 31st March 2012, £15 million space too as you don’t need a large area for the collector How should the unit be sited to ensure the airflow trenches required for ground source heat pumps. and access it needs? What is the recovery time for the hot water cylinder? What’s important is to ensure there is sufficient space for Full volume from 15ºC to 55ºC = 2 hrs 15mins. will be available on a first come, first serve basis. The What refrigerant is used in Greensource air to water airflow into the unit and enough clearance at the front of 70% of volume from 15ºC to 55ºC = 1hr 50mins. funding will mainly be for the 4 million UK households heat pumps? the heat pump to stop cold air re-circulation. You’ll also Greensource air to water heat pumps use R407C. It is need to ensure that there is adequate space for access that do not have mains gas. Can the external air to water heat pump unit be hidden an approved refrigerant featuring zero Ozone Depleting for service and maintenance. You should try to ensure behind bushes, trees and fences? The amount received as part of the Renewable Heat Potential. It also has a low Global Warming Potential that the unit is sheltered from high winds as this will Yes, but you have to be aware that wherever you position Premium Payment scheme, depends on which technology which is more environmentally friendly. What is the lower limit operating temperature? improve the unit’s efficiency level by lowering the fan the unit it has to have adequate airflow available to it and the homeowners is applying for. The voucher value for an power requirement. The minimum clearances required that the discharge air can’t be re-circulated back to the air source heat pump is £850. are shown on pages 14 and 15. inlet. If you don’t take enough care in this respect, it will result in lowering the air temperature and can significantly Homeowners need to ensure that they have basic energy What size of cable should be used to connect the air to reduce the efficiency of the unit. Our recommended efficiency measures and it will be on a first come first water heat pump to the mains electricity supply? clearances should be noted on page 14. served basis. The lower limit operating temperature of Greensource air to water heat pumps is -20°C. What are the key maintenance requirements for Consideration should be given to the size of the unit, the Greensource air to water heat pumps? length of the cable run and the type of cable being used. Can an air to water heat pump be used to cool the home Who can apply for the Renewable Heat It will need servicing once a year by a qualified maintenance Only have installation work carried out by qualified as well as providing heat? Premium Payment? technician. The technician will need to check a number of technicians who will be able to calculate the correct Our Greensource air to water heat pumps are designed to If the resident lives in England, Scotland or Wales, things during the service, including: cable size for each installation. produce heating and hot water only. Greensource air to air they are eligible to apply for the Renewable Heat heat pumps can cool the home as well as heating it. Premium Payment. • A temperature pressure relief valve is fitted – in line with G3 requirements for unvented cylinders • Check the unit for signs of damage or corrosion • Check the panels to ensure there is no vibration and that they are properly fastened • All water connections must be checked for tightness or What is the most efficient flow water temperature setting? The lower the flow water temperature the less hard the What warranty is available? If the homeowners currently relies on oil, liquid gas, solid heat pump has to work and the more efficient it will be. Greensource air to water heat pumps come with a 2 year fuel or electricity then they can apply for air to water It depends on the type of heating system the heat pump manufacturer’s guarantee provided that the guarantee is source heat pumps. is working alongside, but we recommend that the operating registered within 30 days of installation. For more signs of leakage and the system water pressure must temperature for an underfloor heating system is 35°C and information please call 0845 725 6206. be checked for a typical radiator system is 50°C. • The air path to and from the unit must be checked to • So only those who do not currently use gas as their main heating fuel can apply for this renewable Is there a training course available? technology. ensure it is clear What size of radiators should be used on installations linked Yes, Worcester offers a range of training courses including The heat pump water drain tray and the pipe to it must be to air to water heat pumps? a 1 day Greensource Air to Water training course. Please To find out more visit our website: We recommend that radiators are appropriately sized based call 01905 752526 for more information. www.worcester-bosch.co.uk/installer/products/ checked to ensure it is clear and clean. on the heat loss of the home. Most radiator manufacturers funding-for-renewable-technologies will supply selection tables and offer advice on this. 20 21 Greensource air to water heat pump range and accessories Greensource 6kW Outdoor Heat Pump and Hot Water Distribution Unit* Greensource 7kW Outdoor Heat Pump and Hot Water Distribution Unit* Greensource 9.5kW Outdoor Heat Pump and Hot Water Distribution Unit* 100 litre Buffer Storage Tank The very best training programmes from Worcester Worcester has always placed great emphasis on technical Mobile training support and training for installers and service engineers. To complement our training venues across the country, Advances in heating technology, including the increasing use we can also bring training to you. of renewables, make the need for training greater than ever. Worcester Part No. 7 716 150 008 Worcester Part No. 7 716 150 009 Worcester Part No. 7 716 150 010 Worcester Part No. 7 716 192 418 To ensure the highest levels of competence and expertise in the Greenstar gas-fired boilers, dry strip-down models and even installation of all Worcester products, the company runs intensive a Greensource air to air heat pump, ensuring that quality training courses for installers, commissioning engineers and training in a comfortable environment can be achieved on operatives involved with servicing and fault finding. your doorstep! Courses available If it's oil training you require, our 7.5 tonne mobile oil Our training facilities offer a number of courses suitable vehicle is available throughout the country for hands-on for the installer and commissioning engineers, and more product training and OFTEC assessments. in-depth courses for the servicing and fault finding engineers. Training centres throughout the UK 120 litre Buffer Storage Tank We have mobile vehicles fully equipped with operational Distance learning/web based learning Worcester has produced a selection of Distance Learning To enable us to meet the growing demand for training we CD ROMs/DVDs which are packed with information. have invested in additional facilities at the award-winning Call 0844 892 9800 for your copies, or visit training academy at our Worcester headquarters. In addition www.worcester-bosch.co.uk for information to the original academy there is now a new 400m2 unit, 25% on Web Based Learning. of which is devoted to an open-plan domestic training area Get on course for a more profitable future now. with life-size single-storey brick buildings. These feature working Greenskies solar thermal systems which enable Call now for more information 01905 752526 installers to get up onto the roof of the building to get more realistic training. There are bays full of all Greenstar gas-fired appliances, so installers can really get to grips with the Worcester Part No. 7 716 192 638 importance of system design. The additional space will also contain dedicated training areas for our renewable and future products. The training centre will also run certified CODNC01 and COCN1 courses. CODNC01 equips installers with the Aberdeen relevant qualifications for the changeover from domestic to Dundee commercial gas work. COCN1 allows existing commercial Dunfermline installers to renew their qualification. Johnstone Further academies are located at West Thurrock in Essex, Bradford and Clay Cross in Derbyshire, all offering our full Durham suite of courses. Please phone 01905 752526 for more Belfast information about a course near you. Each course is run by specialist trainers and is superbly equipped to deliver a combination of classroom theory and practical hands-on Burnley Bradford Dublin Clay Cross experience that’s second to none. College-linked Learning Worcester Tredegar As well as offering training at our own centres, Worcester West Thurrock has established close partnerships with many colleges Salisbury around the UK, equipping them with our latest products. Call us on 01905 752526 to find out when we will be Camborne running the course of your choice at a college in your area. 22 *Comes complete with 19 litre unvented kit. 23 Worcester training courses One stop shop training Industry focused training courses We are here to provide you with training and assistance for all areas of your business, not just product training. BPEC warm water underfloor heating installation Covering Call us on 01905 752526 to order a full training course brochure. Basic principles & advantages of underfloor heating, floor systems and finishes, operation, installation, testing and post installation activities Duration: 2 days BPEC ventilation Boiler training courses Covering Greenstar CDi gas-fired condensing combi boilers Hot water systems & safety Models covered Greenstar 27/30/37/42CDi Duration: 1 day Covering Greenstar i Junior & Si gas-fired condensing combi boilers Models covered Greenstar 24/28i Junior and Greenstar 25/30Si Duration: 1 day Models covered Greenstar Highflow 440/550CDi and Greenstar FS 30/42CDi Regular Duration: 1 day Models covered Greenstar 12/15/18/24Ri, Greenstar 30/40CDi Regular, Greenstar FS 30/42CDi Regular, Greenstar 30CDi System and Greenstar 12/15/18/24i System Water treatment of domestic heating systems in accordance with BS 7593: 2006 Qualifies for Construction Skills Certification & Registration (valid for 5 years) and Voluntary ACRIB Registration Initial CCN1 + 4 appliances + CPA1 Covering Duration: 1 day Greenstar controls Installation, commissioning and system design Duration: 1 days Installation, commissioning and system design Duration: 2 days Installation, commissioning and system design Covering Covering Covering Covering Installation, commissioning and servicing Duration: 1 day Duration: 1 day 24 Installation, commissioning and system design Domestic/light commercial pressure jet boiler installation Duration: 1 day assessment Domestic/light commercial pressure jet installation, commissioning and servicing Duration: 3 days Oil tank installation and associated controls Duration: 1 day assessment Covering Domestic/light commercial pressure jet boiler installation, commissioning, servicing and oil tank installation and associated controls Duration: 4 days Mobile OFTEC All above covered throughout the country on the mobile training vehicle as well as in all our centres Greenstream MVHR Covering Duration: 3 days OFTEC 101/105e/600e Greenfloor heating Covering Domestic/light commercial pressure jet commissioning and servicing OFTEC 600a Duration: 2 days Greensource heat pumps – air to air Covering Duration: 4 days OFTEC 101 & 105e Greensource heat pumps – air to water Covering Re-assessment for candidates whose CCN1 qualification expires in less than 12 months OFTEC 105e Greenstore ground source heat pumps Covering Covering OFTEC 101 Duration: 2 days Greenskies advanced solar Worcester solar control range and pump stations Duration: 5 day OFTEC training and assessment Greenskies solar hot water system Covering Designed for candidates whose qualifications expired more than 12 months ago Reassessment CCN1 + 4 appliances + CPA1 Duration: 1 day Renewable training courses Installation, commissioning and servicing Duration: 4 days Domestic ACS training and assessment Models covered Greenstar Danesmoor series, Greenstar Heatslave series and Greenstar Camray series Covering Duration: 1 day Duration: 1 day Greenstar Danesmoor, Heatslave & Camray high efficiency condensing oil-fired boilers – pre-OFTEC training Models covered MT10, MT10RF, DT20RF, DT20, DT10RF, TD200, RT10, FR10, FR110, FW100 and ISM1 Duration: 1 day Construction skills F-Gas training/assessment certification Covering Greenstar system & regular gas-fired condensing boilers All G3 Regulations for the installation, servicing and commissioning of unvented cylinders. This course is certified by Logic Certification. Duration: 2 days Chemical water treatment Covering Greenstar Highflow CDi & FS CDi regular floor standing gas-fired condensing combi and regular boilers Installation, commissioning, inspection and testing Duration: 1 day Please note to attend OFTEC courses you must have a minimum of 12 months’ experience installing/servicing oil boilers. For inexperienced candidates, our Greenstar Danesmoor, Heatslave and Camray course offers pre-OFTEC training. For experienced oil technicians training is not a pre-requisite for OFTEC assessment. 25 A complete after-sales service As part of the worldwide Bosch Group, Worcester strives to maintain the highest possible standards of after-sales care. All the technical advice you need In addition to the no-nonsense parts and labour Spares guarantee applicable to all Worcester products, you and Genuine replacement parts for all supported Worcester your customers have the assurance that every Worcester products are readily available from stock, on a next day product is manufactured to both the appropriate British delivery basis. For more information please call your local and European standards. stockist. You can find a spares stockist on our website. Worcester Contact Centre Customer Technical Support Should you require support, our fully trained Contact The Worcester Technical Helpline is a dedicated phone Centre staff, based at our head office in Worcester, are line – committed to providing a comprehensive service to ready to take your calls. Whatever your query our contact complement the brand name and quality of our products. centre operators along with our nationwide team of Our experienced team of technical experts provides engineers are ready to help you. Notes answers to queries of a technical nature across the entire Worcester range. If you do not offer annual service and maintenance contracts please refer your customers to the Worcester Worcester also has a pre-sales department, which provides Contact Centre: assistance in selecting a heating system to suit a particular Tel: 0844 892 3000 application, along with full guidance on installation. For Fax: 01905 757 536 more information please contact the Technical Helpline or Opening Times downloaded at www.worcester-bosch.co.uk. alternatively visit our website where literature can be Monday – Friday: 7.00am – 8.00pm Saturday: 8.00am – 5.00pm Sunday: 9.00am – 12 noon Worcester System Design Service Worcester is pleased to offer a full sizing service to specify the air to water heat pump system according to individual requirements. Technical Tel: 0844 892 3366 Fax: 01905 752 741 Renewables Helpline Tel: 0844 892 4010 Email: firstname.lastname@example.org Opening Times Monday – Friday: 7.00am – 8.00pm Saturday: 8.30am – 4.00pm 26 27 Useful numbers Customer Service Sales Engineer Appointments Tel: 01905 752640 Email: email@example.com Fax: 01905 456445 or telephone 0844 892 3000 Spare Parts Enquiries Tel: 01905 752576 Email: firstname.lastname@example.org Fax: 01905 754620 or telephone 0844 892 3000 Technical Helpline (Pre & Post Sales) Guarantee Registration Tel: 0844 892 3366 To register your Worcester guarantee, Fax: 01905 752741 please visit our website or telephone 0844 892 2552 Renewables Technical Helpline Email: email@example.com or telephone 0844 892 4010 Training Tel: 01905 752526 Fax: 01905 752535 Literature Email: firstname.lastname@example.org or download instantly from our website or telephone 0844 892 9800 Calls to the listed 0844 numbers are charged at up to 3 pence per minute from BT land lines. Calls from mobiles and some other networks may vary. Calls to and from Bosch Thermotechnology Ltd may be recorded for training and quality assurance purposes. www.worcester-bosch.co.uk In partnership with Part No. 8 716 115 319 B 09/11 PAPERS MADE WITH FREE TM 100% CHLORINE BLEACHED PULP Worcester, Bosch Group, Cotswold Way, Warndon, Worcester, WR4 9SW BBT2454 Worcester, Bosch Group is a brand name of Bosch Thermotechnology Ltd. This leaflet is accurate at the date of printing, but may be superseded and should be disregarded if specification and/or appearances are changed in the interest of continued improvement. The statutory rights of the consumer are not affected.