1 Welcome to our Training Centre
2 Green Gateway Initiative The Green Gateway Initiative is a bold and ambitious 10-point plan that points the way to a reduction of over 3 million tonnes of CO2 per year, by 2016. That s the equivalent of removing 830,000 cars from the UK s roads. The Stern Report has highlighted the catastrophic danger to businesses of ignoring climate change and we need to recognise that this is a challenge that involves us all. If we are to meet this challenge and get anywhere near the targets for emissions reductions that the Government has set then we need to look at more energy efficient ways of providing the comfort levels for our buildings that modern life (and increasing legislation) demands. Anyone involved in this industry- architects, developers, consultants, building services specifiers, installers, and equipment manufacturers, needs to find ways to provide modern, comfortable internal environments, in the most energy efficient and sustainable way possible. www.greengatewayinitiative.co.uk
3 Low Carbon Domestic Space and Water Heating Design and Installation
4 Subjects Covered CO 2 Reduction Targets What is The Ecodan Heat pump System Operations Design and Application Service and Maintenance Regulations and Legislation
5 CO 2 Emission Reduction How important is it? Energy saving Cost savings Legal requirement Moral obligation
6 Domestic CO 2 Emissions A major cause of climate change comes from the energy we use to heat, light and run our homes The domestic sector is a critical area and is responsible for 27% of UK CO 2 emissions Energy demand in the sector grew 17.5% from 1990 to 2003 All fossil fuels are finite resources and need to be used as economically as possible. Source: DTI 2002, DEFRA 2002
7 The Code for Sustainable Homes Minimum standards for energy usage Current Building Regulations CO 2 emission = Level 0 Target Emissions Rate Reduction in CO 2 from current building regulations (TER) Level 1 * -10% Level 2 ** -18% Level 3 *** -25% by 2010 Level 4 **** -44% by 2013 Level 5 1 ***** -100% Level 6 2 ****** Zero Carbon by 2016 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 (CO 2 ) from all energy use in the home).
8 C0 2 Emission Levels Fuel Type Kg CO 2 per kwh Boiler Efficiency Kg CO 2 per kwh of useful heat Coal 0.34 85% 0.40 Oil 0.28 90% 0.31 LPG 0.25 95% 0.26 Gas 0.19 95% 0.20 Electricity 0.43 250% 0.17 Typical Efficiencies Coal Boiler 50 to 85% Oil Boiler 50 to 90% LPG Boiler 80 to 95% Gas Boiler 80 to 95% Heat Pump 250 to 500% Worst case heat pump vs. Best case boiler
9 The Ecodan Heat Pump
10 The Ecodan Heat Pump! What is a Heat Pump? Benefits of a Heat Pump The Ecodan Packages
11 The Heat Pump System A heat pump harvests low grade heat energy for free and delivers it where it is useful The heat is upgraded using the vapour compression cycle As the main heat source is free, the efficiency is excellent ~300% to 400% annually
12 The Magic of a Heat Pump! Low temperature renewable heat energy recovered from the environment Energy from the ambient air 2kW High temperature heat output Electrical power in 1kW 3kW
13 The Vapour Compression Cycle: Heating Low pressure saturated liquid and vapour Expansion Valve - throttling Evaporator Compressor Low pressure superheated vapour 4 way valve Condenser Plate Heat Exchanger High pressure high temp superheated vapour
14 Benefits of the Ecodan HP High CoPs (Coefficients of Performance) Reduced Carbon emissions Reduced Energy Consumption Reduced Running costs Electricity can be from Renewable Sources No Gas Supply or Fuel Tank needed
15 Coefficients of Performance (COP) Coefficients of performance relate the useful heat output to the electrical energy consumed COP = Heating output Power consumed
16 Performance Factors The unit harvests and upgrades free heat energy. Therefore the amount of heat delivered is always greater than the energy paid for. COPs in the region of 3.0 to 4.0 are achievable i.e. for every kw of electrical energy consumed 3.0 to 4.0 kw of heat energy can be delivered.
17 Performance Factors: COP at varying conditions Increase in condensing temperature and decrease in evaporating temperature reduce COP. C amb Water temp ºC Inlet/outlet 30/35 40/45 50/55-15 1.77 1.41 (1.37) -7 2.41 1.89 1.46 2 2.97 2.27 1.81 7 3.96 3.05 2.28 20 5.39 3.90 2.87 *Figures for 8.5 KW heat pump ( ) T ambient. - 10 C
18 Weather Compensation The weather compensation works in two ways, primarily the main function is to reduce the heating circuit flow temperature as the outside temperature increases. This allows the heating to increase to its maximum set point temperature when the outside temperature reduces down to -3 C outside.
19 Benefits of varying flow temperature for space heating
20 Benefits of varying flow temperature
21 Standard House Application Case Study
22 Standard House Application Case Study Design conditions House constructed to 2000 building regulations Using the existing radiator circuit for the heating House temperature 18 o C - 21ºC. Ambient temperature 2 o C Flow temperature set point 45ºC
Heat load kw 23 The Reality of the Heat Pump - Case Study 9.00 0.4% 8.00 7.00 6.00 5.00 4.00 3.00 2.00 1.00 0.00 24hrs 452hrs 7.6% Heat load vs. Ambient 2214hrs 37% -3-2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Am bient Tem perature 3326hrs 55% This leaves 2744 hours above 15 C for COPs > 4.0 for space heating, COPs > 3.0 for Hot water heating
24 Practical COP Space Heating Ambient Temp C Output kw COP Hrs/year Total output kwh Total input kwh -5 to 0 7.1 1.6 24 170 106 0 to 5 4.8 2.1 452 2170 1033 5 to 10 2.1 4.0 2214 4649 1162 10 to 15.75 4.5 3326 2495 554 Totals 9484 2856
25 Practical COP Output and time weighted COP COP = 9484 2856 = 3.32
26 Run Cost and CO 2 Emissions Comparison Building Area (m²) Heat Load (W/m²) Building kw Required (kw) Annual Energy Demand (kwh) Efficiency (COP) Annual CO 2 Emissions (Kg) Total Energy Cost per year ( ) HPB 150 50 7.5 17460 3.50 2145 435 Gas 150 50 7.5 17460 0.90 3686 617 Percentage saving 42.0% 29.5% Based on: Night Cost p/kwh Day Cost p/kwh HPB 0.044 0.10 Gas 0.0318 0.0318 150m 2 house 50w/m 2 heat loss
27 Reduced Annual Running Costs
28 Reduced CO 2 Emissions
29 The Ecodan System
30 Ecodan Standalone & Packaged System The Ecodan heat pump can either be installed as a package or as a standalone system Standalone system requires the Mitsubishi Ecodan and the Mitsubishi FTC (Flow temperature controller) Packaged system uses 2 separate units: Mitsubishi Ecodan & Hi-Efficiency Hot Water Tank. The Mitsubishi unit extracts heat from the outside air and transfers it into the property in the form of hot water
31 1. Ecodan 2. FTC
32 Ecodan Heat pump Systems The Air to Water Heat Pump is a pre-assembled self contained unit mounted externally and incorporates: All refrigeration equipment assembled, tested and ready for use 2 x Pre-insulated 1 BSP water connections (flexible hoses) Boiler Buddy standard water filter system. Inline flow setter valve
33 Technical Introduction to New Product Range Ecodan - PUHZ W50VHA 5KW (A2 W35) heat pump boiler Power supply 16 Amp 3 core 1.5mm 2 cable Maximum running Current - 13 Amps Maximum flow rate 14.3 L/M Minimum flow rate 6.5 L/M Pipe diameter 22mm Noise level - 45dba 740mm 950mm
34 Technical Introduction to New Product Range Ecodan - PUHZ W85VHA 8.5KW (A2 W35) heat pump boiler Power supply 25 Amp 3 core 4mm 2 cable Maximum running Current - 23 Amps Maximum flow rate 25 L/M Minimum flow rate 10 L/M Pipe diameter 22mm 950mm Noise level - 49dba Note - This unit will supersede the PUHZ-W90VHA 950mm
35 Technical Introduction to New Product Range Zubadan - PUHZ HW140VHA 14KW (A2 W35) heat pump boiler Power supply 40 Amp 3 core 6mm 2 cable Maximum running Current - 35 Amps Maximum flow rate 40 L/M Minimum flow rate 20 L/M Pipe diameter *28mm 1350mm Noise level 53 dba *Increase in required pipe external diameter 1020mm
36 Inverter System Overview of Ecodan Key Features Inverter Driven Variable Speed Compressor No Starting Current Excellent Temperature Control Quiet Operation R410A refrigerant
37 Reduced Starting current Current D.O.L. Start Inverter Start Time
38 Improved Temperature Control On/Off Control Inverter Control Set Temperature
39 Refrigerants (R410A) This system contains R410A which is a blend of 2 HFCs (HydroFluoroCarbons) R32 and R125. R410A is a highly efficient refrigerant compared with it s predecessors This is a sealed system that should not leak at the end of its life the refrigerant will be recovered and destroyed
40 F-gas Regulations Under F-gas regulations anyone handling refrigerants should have appropriate training Not required as the Ecodan All units are hermetically sealed All contain less than 6kg of refrigerant Installer will not be considered to be handling refrigerant System repair may need a qualified refrigerant handler Analysis of system running parameters will require an understanding of the vapour compression cycle
41 Un-vented store expansion vessel Primary sealed system kit Inc. 3 bar relief valve Pre-charged to 1.5 bar * Supplied with package Set at 0.5 bar *Not supplied with package Sized (by the installer) on the total system volume, (allow 10 litres for the appliance pipe work)
42 Flow setter valve To aid in the commissioning and fault finding procedure a flow setter valve or commissioning valve is supplied with each heat pump boiler. It should be installed in the flow or return pipe-work for the heat pump boiler, an arrow indicates the direction of flow. The flow rate can be adjusted by altering the resistance screw. The valve will give an indication of the actual water flow rate which is being circulated at a given time.
43 Packaged System Operation
44 Packaged System Operation System Operation System User Controls Operational Features Ambient flow temperature adjustment
45 Packaged System and User Controls
46 Weather Compensation CHzone1 max flow temperature 50 C @ -3 C and below CHzone1 min flow OWC applied 30 C @ 15 C and above CHzone1 Temperature ΔT +/ - 5 C This stops the system starting and stopping
47 The Flow Temperature Controller Package
48 Flow Temperature Controller or FTC Key Features The FTC has been designed so that the Ecodan heat pump can be incorporated into a conventional heating system. All system components e.g. Time clock, thermostats, pumps can be either reused in retrofit situations or supplied & installed in a more conventional manner.
49 Flow Temperature Controller or FTC The FTC Package Flow Temperature Controller PAR-W21MAA (Remote Controller) TH1 (Flow Temperature Sensor)
50 Flow temperature Controller System Application & Operation
51 Standalone (FTC) System Operation System Control Chain Single System Piping and Wiring Schematics Complete System Piping and Wiring Schematics Boost Heating Switch Option PAR-W21MAA remote controller initial setting
52 Flow Temperature Controller or FTC The FTC is controlled and switched like a conventional gas boiler by 240V signals sent by the system components i.e. Time clock, thermostats, zone valves and pumps. A PAR-W21MAA remote controller is supplied with the FTC, this is only used to set the target flow temperatures at the commissioning stage. PAR-W21MAA Remote Controller System controls (240V) E.G Stats/Time clock (End user interface) Target flow temperature Operation mode ON/OFF FTC Ecodan HP
53 Flow Temperature Controller or FTC There are 2 ways of interlocking the FTC with heating systems, this is dependant on how many heating mediums are incorporated into the installation Single System Space heating only or Hot water heating only Complete System (S - Plan) Both space heating and hot water heating combined
Flow Temperature Controller or FTC The Single system pipe work schematic FTC TH1 sensor (supplied with FTC) must be strapped and insulated to the water FLOW pipe from the Ecodan. From our initial findings two 15-50 pumps should be installed in series to achieve the required flow rates stated earlier. Ecodan HP Boiler Buddy Flow setter Pumps Internal System Either radiators/underfloor OR hot water At least 150mm pipe work between pump and setter
55 Flow Temperature Controller or FTC The Single system wiring schematic 2 core cable supplied with FTC PAR-W21MAA remote controller FTC Pumps Thermostat Time clock 230V 50HZ L 3 core 1.5mm Honeywell command centre (Optional) N E Ecodan HP To internal system
56 Flow Temperature Controller or FTC The Single system wiring termination schematic 2 = Heating TH1 1 2 Rem. Con. 1 2 TB145 1 2 3 4 5 3 = Hot water Heat pump S1 S2 S3 FTC Relay PCB Pumps Site TH1 Sensor PAR-W21MAA Remote controller Thermostat Time clock S1 S2 S3 Ecodan HP N L 230V / 50HZ
57 Flow Temperature Controller or FTC The Complete system wiring termination schematic TH1 1 2 Rem. Con. 1 2 TB145 1 2 3 4 5 Heat pump S1 S2 S3 FTC Relay PCB Site TH1 Sensor PAR-W21MAA Remote controller Honeywell command centre S1 S2 S3 Ecodan HP To system components
58 Flow Temperature Controller or FTC The Complete system wiring termination schematic (S-Plan) Only difference from Standard S Plan wiring 230V 50HZ L N E 1 2 3 4 5 2 5 8 5 7 1 2 3 4 5 6 7 8 9 10 FTC TB145 Honeywell command centre 1 2 3 1 2 L N HTG HW Time clock 4 6 2 7 4 3 2 10 6 8 N L Room Thermostat E N Pumps L L 2 5 1 10 2 8 1 10 L N Cylinder Thermostat CH ZV HW ZV L N L
59 Flow Temperature Controller or FTC Weather compensation & Boost switch TH1 1 2 Rem. Con. 1 2 Heating boost switch (Optional) 1 2 3 Heat pump S1 S2 S3 FTC Relay PCB Site TH1 Sensor PAR- W21MAA Remote controller Factory fitted loop wire between terminal 1 & 3 This will provide weather compensated flow temperature or Eco Heat during heating mode
60 Flow Temperature Controller or FTC Weather compensation & Boost switch TH1 1 2 Rem. Con. 1 2 Heating boost switch (Optional) 1 2 3 Heat pump S1 S2 S3 FTC Relay PCB Site TH1 Sensor PAR- W21MAA Remote controller The loop wire should be positioned between terminal 1 & 2 if a constant heating flow temperature regardless of the ambient temperature is required.
61 Flow Temperature Controller or FTC Weather compensation & Boost switch TH1 1 2 Rem. Con. 1 2 Heating boost switch (Option) 1 2 3 Heat pump S1 S2 S3 FTC Relay PCB Site TH1 Sensor PAR- W21MAA Remote controller A standard 2-way switch can be installed to give the option of boosting the target flow temperature during higher ambient temperatures. *Terminal 1 must be common
62 Flow Temperature Controller or FTC DIP switch settings Switches on the FTC control board must be set to the following combinations, this is the factory default setting but should be checked during the commissioning stage ON OFF SW1 SW2 SW3 SW6 8 8 8 1 8 1 8 1 8 1 2 Input signal setting Liqud Set temp FTC Input signal setting Off ON
63 PAR-W21MAA remote controller initial setting
64 PAR-W21MAA remote controller initial setting When the power supply is initially switched onto the system the remote controller will flash Please wait in the left hand corner before showing the language setting screen, this is defaulted to English and just needs to be entered by pressing and holding the BACK button 2 and the button 4. for 2 seconds
65 PAR-W21MAA remote controller initial setting The following settings have to be programmed into the controller after the initial power up at the commissioning stage. Setting day & time Setting TH1 target flow temperatures
66 PAR-W21MAA remote controller initial setting Setting the day and time After initial power ON the time and day of the week need to be set To set the time use the arrows. The day of the week can be changed using the *Each press advances the day Sun Mon Fri Sat
67 PAR-W21MAA remote controller initial setting Setting target flow temperatures To set the target flow temperatures for all modes (HEATING/HEATING ECO/HOT WATER) the following procedure should be followed (1) Press the for 3 seconds to activate the initial setting mode.
68 PAR-W21MAA remote controller initial setting Setting target flow temperatures * Disregard these settings Press parameter setting to switch to the next
69 PAR-W21MAA remote controller initial setting Setting target flow temperatures Set the target temperature for both HEATING and HOTWATER heating with the Temp buttons
70 PAR-W21MAA remote controller initial setting Setting target flow temperatures 4 parameters have to be set for the target temperature in HEATING ECO or weather compensation mode (Target flow temp depends on outdoor temp). WATER TEMP HEATING ECO No.1 Display C shows target flow temp Display D shows outdoor temp WATER TEMP HEATING ECO No.2 Display C shows target flow temp Display D shows outdoor temp Press to switch between C and D - The blinking figure can be changed using Temp
71 PAR-W21MAA remote controller initial setting Factory settings and recommended flow temperatures (Standard application) Heating Factory setting 40 0 C Recommended setting 55 0 C Hot water heating Factory setting 50 0 C Recommended setting 58 0 C
72 PAR-W21MAA remote controller initial setting Factory settings and recommended flow temperatures (Standard application) Eco Heating No.1 (lower ambient temp) Factory setting C = -10 0 C D = 38 0 C Recommended setting C = 2C D = 55 0 C No.2 (High ambient temp) Factory setting C = 17 0 C D = 25 0 C Recommended setting C = 17 0 C D = 30 0 C
73 PAR-W21MAA remote controller initial setting Setting target flow temperatures To enter the settings and enable the PCB to memorise the settings the must be pressed. The ON/OFF button 6 can then be pressed to exit the setup mode. Once this stage is reached all the ON/OFF and mode controls will be operated by the time clock/stats etc, the PAR-W21MAA will only be useful to monitor the system operation If required the remote controller can then be removed from the system and the FTC PCB will remember the settings.
74 PAR-W21MAA remote controller Key Features Fault code indication System operating parameters System operating parameters at the time of error
75 Heat Pump System Design
76 Heat Pump System Design Heat loss calculations Radiator / heat emitter sizing Domestic hot water storage volume Flow rates Under floor heating systems
77 Heat Loss Calculation Mitsubishi Electric do not carry design liability insurance General size guidance only Design responsibility of specifier to size unit correctly. Gledhill Water Storage have design service for larger projects
78 Heat Loss Calculation All buildings are suitable for a heat pump! Buildings should be well insulated Old buildings with solid walls have high heat losses Heat loss calculations are required for SAP on new build properties. Mitsubishi BS5449:1990 Heat Loss Calculator available for retrofit properties E-Si performs heat loss calcs for you.
79 Building Heat Loss Calculation Complete information in yellow shaded boxes Insert Dimensions Select figures from the Tables sheet The required boiler size is displayed
80 Heat Loss Calculation Available Ecodan heat pump boiler duties PUHZ-W50VHA (5KW Heating Duty) PUHZ-W85VHA (8.5KW Heating Duty) PUHZ-HW140VHA (14KW Heating Duty)
81 Heat Loss Calculation Please note with the W50 and W85 boilers as the ambient temperature drops the available output also drops they will still provide heat energy at -15 0 C ambient. This is not applicable for the 14KW model.
82 Radiator Guidance Room type Complete information in yellow shaded boxes Insert Dimensions Insert Dimensions Room heat loss is displayed for radiator sizing
83 Radiator Guidance Heat pumps produce water at 30 C to 60 C Ideal for underfloor heating Average underfloor heating circuit 35 C Fossil fuel boilers heat water to 80 C Flow temp in rads design temp approx 70 C or more recently for condensing boilers 50C. Heat pumps can be used with radiators. Sometimes larger surface area to emit heat from lower temp water is required.
84 Radiator Sizing Due to lower flow temperatures provided by a heat pump boiler additional care must be taken when sizing the surface area of a radiator As the temperature difference between the primary and secondary mediums decrease, the heat exchangers surface area must increase to emit the same amount of heat energy
85 Radiator Sizing Tool Available from Mitsubishi Allows rad outputs at variable flow temperatures to be calculated Rule of thumb only
86 Radiator Sizing Comparison Large ΔT High flow temperature 0.56m² = 1.6KW Radiator Dimensions and duties
87 Radiator Sizing Comparison Small ΔT Low flow temperature 1.4m² = 1.6KW Radiator Dimensions and duties
88 Retrofit Radiators Actual surface area currently designed on appearance e.g. under a window, along length of wall Radiator under an average window = 1 1.5 m 2 Average property likely to significantly oversized Perception is small radiator = cold room
89 Radiator Sizing Case Study 3 bed semi detached house built to 2006 regs Heat loss of 5.4kW (20 C/-3 C) Design flow temp of 70 C (normal boiler) Each bedrooms radiator sizes should only be approx 0.5m² at this flow temperature In reality the installed radiators were on average 1.15m² Design flow at 50 C would require radiators to be approx 1.0m²
90 DHW hot water usage patterns Calculations set out in the CIBSE guide should be carried out to decide the amount of DHW storage required for a building. The table below can be used as a rough guide
91 Domestic Hot Water Storage Cylinders and FTC DHW Cylinder Specifications Indirect type (with coil type heat exchanger) 5KW heat pump At least 2m 2 surface area coil should be used 9KW &14KW At least 3m 2 surface area coil should be used (Smaller heat exchangers can be used with Ecodan but please be aware that as the area reduces the performance and storage temperature achievable of the system is reduced) Copper construction We will have recommended specifications for stainless steel vessels after further testing High density injection or spray on foam to current building regulations Connection point for either strap-on or immersed thermostat
92 Domestic Hot Water Storage Cylinders and FTC Cylinder specification sheet This sheet can be completed and sent to a cylinder supplier for a quotation
93 Domestic Hot Water Storage Cylinders and FTC Cylinder thermostat Care should be taken when selecting a cylinder thermostat. If the stat can be set higher than the achievable storage temperature of 55 0 C then space heating will be held off due to hot water priority. It is recommended that a thermostat on which the maximum temperature can be locked is used and is of an electronic type rather than mechanical. This will prevent it asking for a temperature that cannot be achieved and preventing space heating from occurring. A Potterton PTT2 cylinder thermostat is used on our demonstration system. This also gives an indication when the set temp is achieved.
94 The Hot & Cold Supply Flow Rates The hot water flow rate achievable from the HP-DEM is directly related to the adequacy of the cold mains serving the property. The cold supply must be capable of providing the total simultaneous demand, this should be calculated and could be up to 60 litres/minute in some properties. The minimum flow rate recommended for an adequate mains pressure system in any property is 30 litres/minute, this should be checked before the product is applied.
95 Under Floor Heating Systems The BoilerMate contains a pre-fitted pump for the heating circuit (s). When using an underfloor heating system, if the manifold does NOT contain a blending valve it should be of the non-pumped type. The blending valve should be set at the design temperature of the underfloor circuit.
96 Summary Careful consideration must be given to appropriate application of this technology to maximise its benefits it will not suit all properties, especially many retrofits Heat emitters may need to be larger Remember lower flow temperatures maximise COP Various regulations apply to the design and installation of such systems
97 Application
98 Application Ecodan location and installation considerations Gledhill location, installation and DHW supply considerations Interconnecting pipe work and wiring
99 Location Considerations Weight Space requirement Anti Vibration/Noise requirements Electrical details Drainage
100 Space requirements Space is required around the a heat pump to allow air flow. Below is the required space for the 8.5KW heat pump, these vary for other models and can be found in the relevant installation manuals.
101 Space requirements Air outlet grille for each model are available to divert airflow and reduce minimum dimensions (PAC-SF08SG-E). (Figures in brackets are for 14KW model)
102 Space requirements As Ecodan recovers heat from the environment, the exhaust air from the fan can be uncomfortably cold, deflectors are available if the units are to be installed in a pedestrian area e.g. Patio Considerations should be made so that the area in front of the Ecodan is not going to cause to much disruption to occupants
103 Noise / vibration nuisance Care should be taken to prevent any vibration transfer into buildings Flexible hoses (2 x 600mm 1 bore steel braided rubber flexible hose, one for flow and one for return, supplied loose with the unit. (Supplied with package) Anti- Vibration mountings i.e Tico pad (NOT supplied with package) Noise considerations should be taken into account when locating in close proximities with other residences
104 General Ecodan Electrical Installation A qualified part P certified Electrician is required to install the power supply Care should be taken to ensure the power supply is weather proof Supply cable should be either armoured cable, or twin + earth protected in conduit Power should be isolated locally within 1.5 metres, minimum 3mm contact gap in isolator An RCD (residual current device) should fitted in the supply to the Ecodan this should have a tolerance of 30mA
105 Defrost Cycle & Drainage As the Ecodan extracts heat from the air at low temperatures the heat exchanger may accumulate a slight build up of frost/ice. The unit will detect this and automatically reverse its cycle sending hot gas (up to 60 0 C) around the coil as a defrost strategy. This usually last for less than 4 minutes.
106 Defrost Cycle & Drainage When the unit is providing water heating the refrigerant to air heat exchanger will cool, and therefore condense moisture from the air. This condensate will drain from the unit and provision for its disposal may be needed i.e gravel pit. Up to ~ 8L/hr
107 Summary and additional external considerations Clearances around unit and provision for condensate disposal Noise, visual impact on property and neighbours. e.g. avoid sitting near windows, anti vibration pads available Qualified electrician required to install power supply Planning permission Scaffolding tower and/or ladder access for installation and servicing at high level Protection from physical damage/vandalism
108 Electrical Considerations A qualified part P certified Electrician is required to install the power supply Power should be isolated locally within 1.5 metres 6mm core cable protected by a 32 amp MCB All other internal protection is supplied pre-wired in the package
109 Interconnecting pipe work and wiring Pipe work and insulation Visual Impact Essential protection requirements Wiring
110 Interconnecting pipe work and insulation Required pipe work diameters between outdoor and indoor. 22mm 28mm PUHZ-W50VHA PUHZ-W85VHA PUHZ-HW140VHA Note Larger diameter required for 14KW model
111 Interconnecting pipe work and insulation Gledhill package - interconnecting pipe run must not exceed 60 metres equivalent length (30 metres difference between units) inclusive of height difference. Standalone package flow rates for each heat pump model must be achieved by sizing the circulating pumps to suit the pipe work. Provisions should be made to fit AAV s or bleed valves at the highest point in the pipe work Pipe work MUST be insulated with Armaflex or similar insulation (thermal conductivity 0.04W/m.K). To ensure minimal thermal heat loss *(Failure to to insulate the pipe work WILL reduce the efficiency of the system dramatically) For weather protection To help prevent freezing
112 Air locks, evacuation and lack of flow rate Precautions should be taken to ensure the evacuation of all air from the entire primary system. To accomplish this automatic air-vents should be installed at the highest point of the primary pipe work. Failure to do so will result in the heat pump boiler displaying one of the following errors on the Ecodan PCB LED display 7 Segment LED 7 Segment LED OR U1 P6 To reset turn the power to the Ecodan OFF & ON. Continuous reset with failure to rectify the fault will result in damage to the boiler
113 Heating System Bypass Automatic bypass valves will be required in the heating systems if it is proposed to fit thermostatic radiator valves (TRV s) to all radiators or fit zone valves to control all the separate heating circuits. To meet the requirements of Building Regulations for a boiler interlock, it is recommended that the radiator in the area where the room thermostat is installed should be fitted with lock shield valves on both connections
114 The Hot & Cold Supplies If the dead leg volume of the hot water draw-off pipe work is excessive a secondary hot water circulation system could be considered. *As a rule of thumb if the hot water delivery time is greater than 60 seconds Secondary Hot Water Circulation 1. Bronze circulator 2. Expansion Vessel 3. Hot water return pipework 4. Single check valve/non return valve - should be fitted as close as possible to the Accolade 2000 appliance 2 SCV SH WHB BATH 4 1 3 Hot flow & return pipe work must be insulated SINK WHB
115 Visual Impact Considerations Location of Ecodan External pipe work Minimise external pipe runs Trunking E.g inaba-denko
116 Interconnecting cables PUHZ-(H)W50/85/140VHA with Flow Temperature Controller A 4 core interconnecting cable is required, this is not supplied with the package Minimum conductor size 1.5mm² Must not exceed 30 Metres in length Must be one cable without any joints
117 Essential protection requirements Filters The heat exchanger must be protected from particulate contaminates in the water circuit. When retrofitting provision shall be taken to avoid contaminates blocking the water circuit within the Heat Pump. A Fernox boiler buddy is supplied with the package and MUST be fitted to the system between the Ecodan and Boilermate as close to the Ecodan as possible in the flow line. * It is not weather proof so should be positioned indoors
118 Freezing! One of the biggest risk to the system is freezing the water contained in the plate heat exchanger. Heat exchanger has 1mm capillaries Therefore vulnerable to ice damage A burst heat exchanger will cost 300 Plus a days labour from a fridge engineer Possible compressor damage Potential bill of 900+
119 Essential protection requirements Provision shall be taken to avoid this pipe work freezing during winter months i.e. antifreeze/inhibitor, such as: Fernox PROTECTOR ALPHI-11 Protects against corrosion and limescale commonly used in heating systems Non-toxic, environmentally friendly Combined antifreeze and inhibitor Should make up 25% of the total volume.
120 Commissioning
121 Commissioning Checklist Add Fernox Alphi 11 (anti freeze) Check air charge is in expansion vessels Pressurise primary circuit to approximately 1.50 Bar Open all isolating valves Release ALL air from the system using automatic air vents at the highest points of the system
122 Commissioning Before bleeding the air from the system the zone valves should be manually opened to prevent air lock and possible damage of the circulating pumps.
123 FTC System Commissioning Operate the system by selecting constant run for BOTH channels on the installed two channel time clock DHW heating will then take priority and raise the hot water store until the cylinder thermostat is opened. Once this temperature is achieved check that the DHW zone valve closes and CH valve opens. With the boost switch link between terminals 1 and 2 the system should then target the preset temperature selected in heating mode during the Initial Setting mode.
124 Commissioning Indications should be placed on the system and in the house instructions to ensure that if for any reason the heating system is emptied the anti-freeze in the pipe-work is replaced.
125 Service and Maintenance
126 Annual Servicing (Boilermate) Service/maintenance recommendations relating to the Un-vented store. Check that the correct rating and type of fuse is fitted to the electrical supply. Check for the presence of supplementary earth bonding. Clean out the strainer in the combination valve. Check the expansion charge pressure and top up if necessary (1.5 bar). Clean flow regulators (restrictors/aerators) as applicable and check for correct flow rate.
127 Annual Servicing (Ecodan) Low maintenance sealed system Like a fridge! Refrigeration engineer not required Essentially a visual inspection Unit needs to be kept clear of debris Check for signs of damage to unit Heat exchanger to be kept clean - Calclean environmentally friendly coil cleaner - Brush to remove debris e.g. leaves
128 System Monitoring & Diagnosis LED Display inside Ecodan Unit 7 Segment LED ON 1 2 3 4 5 6 Display Comp 4-way valve Solenoid valve Warm up 0 - - 1 - - ON 2 - ON Display O C H d Mode Off Cool Heat Defrost 3 - ON ON 4 ON - 5 ON - ON 6 ON ON 7 ON ON ON 8 ON
129 System Monitoring Set dip switches to monitor system parameters either current or pre fault condition Please Refer to the Technical Manual for Settings Note settings are not the same as other Mr. Slim ON 1 2 3 4 5 6 7 Segment LED
130 System monitoring examples Water inlet temperature (TH32) Ambient temperature (TH7) LEV-A & B opening pulses Discharge temperature (TH4) Discharge superheat Compressor running current Note All of the above examples can be checked for current or pre fault code values
131 Air to Water Ecodan Refrigerant Circuit P-sensor TH7 8 TH3 Water out 9 2 Plate H/ex. TH32 3 4 5 10 6 1 TH4 HP switch Water in TH6 11 7
132 Ecodan Monitoring Parameters P-sensor TH7 Water out TH3 Plate H/ex. HP switch TH4 TH32 Water in TH6
133 Warm up mode on 4 hours 30 min off 30 min At power on, warm up mode operates 4 hours & stops 30mins Outdoor temp 21 c or less warm up mode operates 30mins & stops 30mins Compressor buzzes Unit Applies Low frequency, Low current power to the compressor
134 Regulations and Legislation
135 Regulations Working at Heights Approved Document P: Electrical Safety Approved Document E: Resistance to the Passage of Sound Approved Document B: Fire Safety Approved Document L1A: Conservation of Fuel and Power (New Dwellings)
136 Electrical Regulations Approved Document P: to cover power supply to Gledhill Unit Approved Document P: to cover power supply to Mitsubishi Unit Wiring Regulations: 17th Edition apply in both cases
137 Approved Document P: Electrical Safety Third party certification is not permitted The installation and commissioning of external mains voltage equipment is a controlled service The interconnecting wiring is not subject to approved document P, as it only carries 12v and is classed as extra low voltage
138 Additional Qualifications Installers must have attained a City & Guilds Certificate (6084) in Energy Efficiency to commission the unit What the C&G 6084 course covers: Why energy consumption affects the environment How energy efficiency affects the heating installer Legislation that forces change The requirements of Approved Doc. L and supporting documents such as CHeSS
139 Approved Document L1A: Conservation of Fuel and Power (New Dwellings) Installations must conform with this document The Domestic Heating Compliance Guide gives further guidance The installation of heat producing equipment is a controlled service Standard Assessment Procedure (SAP)
140 Microgeneration Requirements The government has produced a Microgeneration Installation Standard This outlines best practice for heat pump installations Any Grants and/or tax concessions will be dependant upon adhering to this standard Installations need to meet the requirements of the HVCA Guide to Good Practice Heat Pumps (TR/30)
141 Microgeneration Requirements Installers must have current accreditation such as:- Appropriate NVQ level 3 Other relevant training e.g. Manufacturer s product training Membership of a competent person scheme Possession of a relevant Skillcard Experience gained through a mentoring process Demonstrable track record of successful installation The relevance of the above will require independent verification
142 Microgeneration Requirements The contractor must understand the design and its application and explain this to the customer This explanation must include the proportion of design heat loss and design hot water load to be supplied by the heat pump and an estimate of the annual energy performance The following disclaimer must be included:
143 Microgeneration Requirements - Disclaimer The performance of Microgeneration heat pump systems is impossible to predict with certainty due to the variability of the climate and its subsequent effect on both heat supply and demand. This estimate is based upon the best available information but is given as guidance only and should not be considered as a guarantee.
144 The Future of the Heat Pump Cleaner electricity generation Lower CO2 emissions Heat pump advantage grows Carbon free generation = carbon free heating Low carbon electricity generation is enhanced by a factor equal to the COP of the heat pump Carbon savings from installed heat pumps will improve as each year passes
145 The Future of the Heat Pump If CO2 emission reduction is important, the heat pump has a big future The air heating products have been available for some time The water heating products have now arrived Advances in technology have now made water heating a more than viable option
146 Thank you Discussion