1 Welcome!. 2 HTU11C Biomass Appliance Selection, Installation, Commissioning & Decommissioning

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Welcome!

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HTU11C

Biomass Appliance Selection, Installation, Commissioning &

Decommissioning

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MCS ; Microgeneration Certification Scheme

For information:• MCS publish technology specific guidance documents based

on European standards already in existence. • These standards have been approved for installers and

manufacturers for the installation or product approval of Biomass, Heat Pumps, PV and Solar Thermal.

• These documents are referred to through our biomass training units and accompanying slide shows. The biomass standard particular to the HETAS H005DE course is the MIS 3004.

• Register with HETAS for MCS installer business accreditation.

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• Air Supply (suction) Fan The boiler or suction fan may be used in log burning appliances and pellet and chip burning appliances. The purpose of this component is to maintain sufficient air supply to support the combustion process.

• Ash Removal System (manual) A manual ash removal system is typically used in batch fed log appliances to enable clearance of the ash that is generated through the combustion process.

Components of a Biomass Appliance (p3)

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• Ash Removal System (automatic) An automatic ash removal system may be used in chip or pellet appliances to automatically clear the coarse combustion ash and any loosened fly ash from the appliance grate area. An automatic ash removal system will typically comprise of a motor operated ash removal auger and an ash collection/storage bin.


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• Automatic Heat Exchanger/ Flue Cleaning Mechanism An automatic heat exchanger/flue cleaning mechanism may be used in pellet and chip appliances to ensure that the heat exchanger and heat exchanger passages are kept free of fly ash and other combustion related deposits.

Components of a Biomass Appliance

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• In some types of biomass appliance the heat exchanger is automatically cleaned pneumatically by means of an intensive compressed air shock.


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Components of a Biomass Appliance• Manual Heat Exchanger Cleaning MechanismSome appliances (typically batch-fired log boiler appliances) may include a manual heat exchanger/ flue cleaning mechanism for the removal of fly ash and other combustion related deposits

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• Automatic Ignition SystemAs the name implies an automatic ignition system may be included in a biomass appliance to enable the combustion process to be started without the need for manual ignition. An automatic ignition system used in biomass appliances is a system that utilises hot air that is generated by a heating element.


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• Combustion Chamber The purpose of the combustion chamber is to provide a suitable environment in which the fuel can be burned safely and in a controlled and efficient manner. Some biomass appliance combustion chambers are lined with refractory brick elements to protect the combustion chamber from premature deterioration that can occur through excessive temperatures and the fluctuation in combustion temperatures that occur during appliance operation.

• Combustion Controller The purpose of the combustion controller is to automatically control the combustion process so that optimum efficiency is achieved during appliance operation. A combustion controller is an electronic printed circuit board (PCB) based component. The combustion controller operates using reference variables received from the appliance’s lambda sensor and temperature sensors.

Components of a Biomass Appliance (p5-6)

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• Fire Bed The fire bed has a number of functions which include supporting the fuel, preventing unburnt fuel falling through the grate, preventing unwanted heat transfer within the appliance and in some appliance designs, enabling combustion air to reach the fuel.


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• Flue Gas Exhaust Control The purpose of flue gas exhaust control is to ensure that optimum air draught conditions within the appliance are maintained.

• Flue Gas Temperature Sensor The appliance flue gas temperature sensor provides the reference variable required to enable the combustion controller to regulate the supply of primary air to the combustion chamber. The control of the primary air supply enables the control of the heat output from the appliance.


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• Fuel Store The learner support materials for HETAS Unit HTU01K provide details and examples of biomass and other fuel store arrangements. The purpose of a biomass fuel store may seem obvious through the name of the component; however the type of physical containment of the fuel whether it be a hopper, silo, underground tank or log store can take many different forms.


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• Heat Exchanger The purpose of the appliance heat exchanger is to enable the efficient heat transfer from one medium to another i.e. in the case of a wet biomass appliance from the fire/heated air to the heating system primary water.

• Induced Draught Fan An induced draught fan is used to draw the combustion gases through the appliance and into the flue/chimney system with the primary purpose of ensuring optimum draught within the appliance. The provision of an induced draught fan typically ensures the highest level of appliance operating performance.


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Lambda Sensor (p7)The lambda sensor (Figure 6) measures the residual oxygen level in the flue gas as it leaves the appliance and provides the reference variable required to enable the combustion controller or lambda controller to regulate the secondary air and fuel feed as appropriate to achieve optimum combustion efficiency and optimum emission values. The lambda sensor is installed in a protective tube with a heat-resistant gasket. It is calibrated via the appliance control system.

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• Primary & Secondary Air ControlPrimary air is delivered under the fuel bed and secondary above. Tertiary air is a mixture of both and controlled by air valves through the control panel.

The purpose of the primary air control is to regulate the quantity of air that reaches the fire bed or grate in order to control the burn rate of the fuel.

The purpose of the secondary air control is to regulate the quantity of air that is received above the fire bed or grate to ensure that combustion process is complete and efficient.

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Figure 8. Example air flow regulator unit with servo motors (p8)

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• Suction & Drive Feed Systems for Pellet Fired Boilers

A suction feed system may be used with a pellet burning appliance to transfer the fuel from the fuel store to the appliance. A drive feed system may be used with a pellet burning appliance or a wood chip appliance to transfer the fuel from the fuel store to the appliance. There is a wide range of suction feed and drive feed systems available

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Thermal Discharge Safety Valve

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Heat Metering

All installations eligible for RHI MUST be meter ready.

See Page 9 of Unit 11 and MCS D-RHI Guidance.

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Compliance Certificate

• A full heating design MUST be produced for any biomass installation eligible for the RHI.

• The design must then be produced and submitted as part of the MCS installation submission documentation.

See Appendix at the rear of this Training Unit (MCS Compliance Certificate – Biomass)

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Calculating the Heat Load

Heat load is proportional to the heat lost from the building and by the

following factors need to be considered:

• Heat loss through the building fabric.

• Ventilation heat loss – through leaks in the building (adventitious air) or

purpose provided.

• Domestic hot water.

• Pipe work losses.

• Exposure or geographic location of the property.

• Adjoining properties which should be assumed to be unheated.

• Intermittent heating systems which should be designed to enable design

temperatures to be achieved within a reasonable period.

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• Fabric heat loss (Watts) = Area x U-value x Design temperature

difference ∆t

Where:

• Area = the total area of each material type in the room in m²

• U-value = the U-value of the material in W/m²K.

• ∆t Design temperature difference = Tin (design temperature

inside °C) – Tout (the minimum outdoor temperature in °C)

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Ventilation Heat Loss

The principle calculation is:

• Ventilation heat loss (Watts) = 0.33 x Volume V x Air changes N x Design

temperature difference ∆t

Where:

• 0.33 is a constant of the specific heat and density of air under typical

conditions.

• V = Volume of air in the room in m³.

• N = the number of air changes per hour.

• Design temperature difference ∆t = T in (design temperature inside °C) - T

out (the minimum outdoor temperature in °C).

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Air Changes

• Approved Document F provides guidance on the minimum ventilation required for new properties in terms of litres per second, but the following table gives typical building air change rates for use in design calculations.

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Design Temperature• The design internal temperature for domestic properties is

typically given at 21°C for all rooms except bathrooms at 23°C. Controls to limit temperature are provided so that the occupant can increase or decrease room temperatures as required. Increased temperature is normally specified for the elderly or infirm.

• The normal minimum external temperature used for heat loss calculations is dependent on location but typically is defined as a minimum of -3°C (with an extra -0.5°C for every 160m above sea level). The difference in the design temperatures (internal and external) is used to calculate heat losses.

• Design temperature difference ∆t = Tin (design temperature inside °C) - Tout (the minimum outdoor temperature in °C)

• Example, ∆t = 21°C – (-3°C) = 24°C

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Calculation MethodsThere are various methods to calculate heat loss, example methods include:• A detailed heat loss analysis using the longhand method as in

the DHDG.• The Energy Savings Trust, CE 54 The Whole House Calculation

method.• Industry software such as The HHIC Heat loss Calculator and

Radiator selector published by the Heating & Hotwater Industry Council.

• Standard Assessment Procedure (SAP) or Reduced data Standard Assessment Procedure (RdSAP) based software (RdSAP will only provide a very basic heat loss calculation and should not be relied upon for sizing biomass systems).

• Methods as suggested by MCS biomass heat loss calculations.

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U-values

• The resistance to which an element of the building fabric conducts or transfers heat is known as the ‘U-value’ which is given as W/m²K (Watts per square metre per degrees Kelvin).

• The U-value depends on the physical properties and thickness of the material from which the element is made and the external and internal surface resistance. The smaller the U-value the better the insulation of the building.

• Approved Document L of the Building Regulations for England and Wales and Part 6 of the SBSA Technical Handbook for Scotland provides the Approved Calculating Methods. A list of U-values can also be found in the DHDG.

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Group activity:The next session that follows will provide you with an understanding on how to calculate the Heat Load for a given property utilising a biomass appliance.

You will need to refer to your training manual HTU11 pages 13 and 14.

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Energy Consumption

• Calculations to Estimate Energy Consumption• Delivered energy consumption kWh = Boiler output

kW x boiler usage hours• The following examples identify three different

methods to analyse fuel consumption. The examples consider a property located in Wales occupied by 4 people with heat loss of 15.5kW without consideration of hot water.

• Method 1 - Basic Estimate (p14)

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Energy Consumption• Method 2 - Seasonal Demand & Degree Days (DD). • A means to establish seasonal demand is by using

Degree Days.• This is a historical record of the temperature difference

between a base line level and the actual temperature on an hourly basis. The standard baseline temperature used to calculate degree days in the UK is 15.5°C.

• Degree Day figures quantify the variance in temperature between actual and base line, for any particular region, as a single index number on a month-by-month basis. The long-term averages of these figures can be obtained, by searching via the Internet free of charge, see http://www.vesma.com/ddd/regular.htm

http://www.vesma.com/ddd/regular.htm

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Energy Consumption

• Method 2 - Seasonal Demand & Degree Days cont. • The second example uses the same building heat loss

but now includes a calculation for Degree Day data for a same property located in Wales where 1841 heating days are required.

• In reality degree days alone cannot be relied upon to accurately calculate energy consumption.

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Energy Consumption

• Method 3 - The Weather FactorUsing the Weather Factor has proven to provide a more accurate method of calculating energy demand and fuel consumption for older properties (pre 2002).

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Calculations to Estimate Peak Fuel Consumption

• For estimating peak energy and fuel consumption during the coldest winter months, we can predict maximum fuel consumption for the month of January with the boiler operating for a 12 hour heating period. The following calculations provide an indication of the maximum amount of fuel that would be used in a typically cold winter month of January so that peak fuel consumption can be assessed and an allowance for fuel storage can be made.

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Comparing Energy Consumption Calculations Against Previous Fuel Bills

• As a method of checking estimated energy consumption calculations, it can be useful to compare the calculated estimated results against historic energy bills. Using information such as those from fuel oil accounts or gas accounts can help determine potential savings.

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Domestic Hot Water (DHW) Requirements

• DHW must also be considered in the final calculation. The extra energy demand for domestic hot water as a general allowance of 40 litres per person per day.

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Fuel Consumption (p17)

• Once the delivered energy consumption is known an estimate of the annual fuel consumption and peak fuel consumption can be calculated to establish fuel storage requirements and fuel delivery frequency.

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Annual Fuel Consumption (p18)

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Peak Fuel Consumption for January (p18)

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Fuel Storage Volumes

• In order to calculate the fuel store volume, and economic fuel delivery arrangements the following parameters are required:

• Fuel consumption kg • Density of fuel kg/m3

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Fuel Storage Volumes

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Systems Incorporating Hot Water Storage Vessels (p21)

• In many biomass installations, it is necessary to include a vessel of heated water. The description of which in context to the biomass industry is namely a ‘Buffer Vessel’, Accumulator’ or ‘Thermal Store’. In principle, heated water can be generated at maximum boiler efficiency and stored for use at a later time, particularly when the boiler may not be alight.

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Systems Incorporating Hot Water Storage Vessels (p21)

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Accumulator (p22)

Accumulator Sizing• Accumulators and buffers are generally necessary for

use with log, chip and pellet boilers to reduce cycling and essential for operation with a batch fed log boiler.

• Unfortunately, the wide ranging performance characteristics of different types of biomass boiler make generalisations impossible. Nevertheless it is very important that the heating designer knows the principles of storage sizing.

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The supplier of the biomass equipment should be asked to size the appropriate system given the following information:1. The heat demand of the building2. The nature of the heat emitters (e.g. radiators or

under floor) and their operating temperature (e.g. 80/60°, 70/50°, 55/45°, 35/30°)

3. The firing regime required by the householder4. The heating pattern chosen by the householder (e.g.

continuous or intermittent operation.)

Accumulator (p22)

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Buffer (p23)

A buffer tank can be used to:• Smooth demand on a chip or pellet boiler system.• Meet demand when boiler output is low.• Store heat for use after a batch fuelled appliance has

finished burning.• Combine more than one heat source.

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Buffer (p23)

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Buffer Vessel Sizing (p24)The capacity ratio required for a buffer vessel, measured in litres per kW of biomass boiler rating, is dependent on many factors:• The type of biomass boiler grate, e.g. underfed stoker,

moving grate or stoker burner, which determines the fuel load on the grate.

• Whether the biomass boiler is an automatic ignition boiler or one which operates in slumber mode.

• The fuel load on the grate to be burned off prior to biomass boiler shutdown or entering slumber mode.

• Whether a feed auger needs to be emptied onto the grate and the fuel burned off prior to biomass boiler shutdown.

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• The mass of ceramic lining from which heat has to be removed prior to biomass boiler shutdown.

• The type of fuel being burned.• The temperature difference across the buffer vessel.• The time to reach operating temperature on automatic

ignition biomass boilers.

Buffer Vessel Sizing (p24)

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Buffer Vessel Sizing (p24)

Rules of thumb should not be used for sizing buffer vessels as capacity ratios vary considerably depending on the particular combination of the above factors.

However, some typical capacity ratios for a temperature difference of 20°C are:• Underfed stoker boiler burning wood chips 5-10 l/kW.• Underfed stoker boiler burning pellets 10-15 l/kW.• Moving grate boiler burning wood chips 20-40 l/kW.• Moving grate boiler burning pellets 30-60 l/kW.• Stoker burner boiler 10-15 l/kW.

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Parallel system (p25)

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Series System (p25)

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Thermal Store (p26)

• The thermal store can be described as a small buffer tank normally with a capacity of 200 – 300 litres. These duties are normally limited due to the size but even so provide a neutral point to integrate other technologies such as solar thermal, heat pump, room heater with back boiler or other heating system.

• Please refer to the legends in your manual.

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System Design (p27)

• Low Temperature Distribution Systems• Factored Radiator Systems• Under Floor Heating• Weather Compensation Systems• Sealed Systems• Please refer to the paragraphs on page 27 of

Unit 11

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Expansion Vessel Sizing

• In order to calculate the correctly sized expansion vessel an assessment of the total water content of the installed system will be required. BS EN 12828: 2003 provides design information for water-based heating systems and Approved Document G requires that there is means to resist the effects of expansion and temperature.

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This may be calculated by:• Expansion Vessel Volume= 0.156 x system volume Information required:The total water content of• The pipework; (see Table 6 on page 29).• Boiler – from manufacturer’s data sheets.• Heat emitters to include radiators, under floor heating;

(radiator manufacturers usually show water content in terms of section).

• Auxiliary circuits.• Accumulator / buffer tank/ thermal store.

Expansion Vessel Sizing

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Temperature Pressure Relief Discharge Pipework

The BuildCert TMV scheme recommends the following set maximum mixed water outlet temperatures for use in all premises:

• 48°C for bath fill • 41°C for showers;• 41°C for washbasins;• 38°C for bidets.

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Typical Discharge Pipe Arrangement (p31)

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Hydraulic Design

Correct sizing, positioning and installation of circulating pumps and valves should be carried out so the entire system can be correctly balanced on completion. Correct sizing of radiators, pump and tanks is imperative for efficient operation. Guidance for this can be found in the CIBSE Domestic Heating Design Guide. Once the correct components have been installed, the system should be filled, bled and the following checked prior to commissioning.• The circulation pump functions correctly.• The system valves are open, including the shunt valve.• The automatic control and safety devices are working

correctly.

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Hydraulic Decoupling (p32)

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Heating System Designs (p33)

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Heating System Designs (p33)Boiler circuit with thermostatically controlled three-way distributor valve

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Costs

• There are a number of factors to consider when working out the long-term costings of an installation, including initial purchase and setup, ongoing running costs such as fuel and routine service and maintenance.

The prices in Table 8 are a guideline only and are not definitive. They are based on prices given by suppliers who are all accredited to either the EnPlus scheme for pellets or the Woodsure Plus accredited by HETAS Quality Assured Fuel Scheme and as such deliver fuel of reliable and consistent quality to all applicable standards.

Installers and consumers should check with their local supplier directly for up-to-date prices or information on product properties such as density or moisture content in order to make an accurate calculation for a given installation.

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Running Costs

• The cost of running a heating system is based on the fuel price but must also take into account the efficiency of the heating appliance, the control method, the geographical location and the amount of time it is being used.

• Maintenance costs are appliance specific and reference must be made to the manufacturer’s recommendations. An expected annual service and maintenance charge must be allowed for.

Maintenance Costs

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Life Cycle Cost Analysis

• In order to make cost comparisons for different heating systems, whether wood heating or otherwise, it is useful to consider the costs over the lifetime of the system.

• This costing allows us to correctly calculate the cost per unit of energy over the life of the system and includes the capital and maintenance costs as well as the fuel costs.

• The cost analysis in Table 9 on page 36 only looks at the capital and running costs over a fixed period. This is set at 7 years to reflect the RHI timescale.

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Lifecycle Costing (p36)

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Biomass Appliance Installation

Group ActivityComplete a Pre-installation checklist for a given installation within the training centre in accordance with Table 10 HTU11 (p37).

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Installation Activities and Process (p38)

The typical stages and order of the installation process are:

1. Assembly and positioning the appliance.2. Connection of the appliance to the flue/chimney.3. Assembly and positioning of the fuel storage arrangement (where applicable).4. Assembly and installation of the fuel transfer system (where applicable).5. Connection of the appliance to the heating/hot water system.6. Connection of the appliance to the electrical supply and electrical safety checks

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Biomass Appliance Commissioning (p39-40)

• The documentation required for commissioning to proceed

• Hydraulic circuit tightness testing, flushing and cleaning requirements

• Equipment required for commissioning• Pre-commissioning check requirements• Commissioning requirements.

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Documentation Required for Commissioning to Proceed (p39)

• the biomass appliance manufacturer’s commissioning instructions

• the fuel transfer system manufacturer’s commissioning instructions (where applicable)

• instructions on the use of commissioning equipment

• a blank commissioning record and checklist (unless included in the appliance manufacturer’s

• commissioning instructions).

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Hydraulic Circuit Tightness Testing, Flushing and Cleaning Requirements (p39)

BS EN 14336:2009 states:‘The heating system shall be pressure tested to a pressure at least 30% greater than the working pressure for an absolute period, as a minimum of 2 hours duration.• Flushed and cleansed in accordance with BS7593• Water treatment must be added in accordance

with manufacturers instructions.• Antifreeze or supplementary heating

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Maintenance of Equipment (p40)

• It is a requirement under MIS 3004 that analysers are calibrated on an annual basis.

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Electronic Combustion Analysis (p43)

Use of electronic combustion analysis equipment has increased in recent years. The typical procedure for using electronic combustion analysis equipment is as follows:1. Check that any required user maintenance has been

carried out, that the unit is in good, serviceable condition and has a current calibration certificate

2. Purge the unit using fresh air.3. Insert the tip of the analyser probe into the centre of the

flue.4. Allow for stabilisation.5. Take readings.

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Equipment Required for Commissioning (p40)

• The commissioning of a biomass appliance will typically require the following specialist equipment:

• Draught gauge • Combustion analyser designed for use with

biomass (Wood pellet or Chip) appliances.• Temperature measurement equipment

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Commissioning Activities

• Pre-commissioning check requirements– Refer to Table 12 (p41).Group Activity– Using Table 12 complete Pre-commissioning checks

• Commissioning Requirements– Refer to Table 13 (p42)Group Activity– Using Table 13 complete Commissioning checks

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• Notification requirements (p43 & 44)ADL states• “Commissioning means the advancement of a fixed building service

following installation, replacement or alteration of the whole or part of the system, from the state of static completion to working order by testing & adjusting as necessary to ensure that the system as a whole uses no more fuel & power than is reasonable in the circumstances, without prejudice to the need to comply with health & safety requirements. For each system commissioning includes setting to work, regulation (that is testing & adjusting repetitively) to achieve the specified performance, the calibration, setting up & testing of the associated automatic control systems & recording of the systems settings & the performance test results that have been accepted as satisfactory.”


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• (If MCS) MCS Compliance Certificate (p48)• Or here

www.microgenerationcertification.org/mcs-standards/compliance-certificate


http://www.microgenerationcertification.org/mcs-standards/compliance-certificate

http://www.microgenerationcertification.org/mcs-standards/compliance-certificate

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Handover

• The handover process will typically involve the provision of oral and written information to the customer or the customer’s representative.

Refer to Section 6 (p45).

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Decommissioning Biomass Appliances

Reasons to decommission:• to enable servicing and maintenance work

(temporary decommissioning); or• because the appliance has reached the end of

its useful life, become obsolete or is inefficientor• Because the appliance is beyond economic

repair (permanent decommissioning).

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Decommissioning

• Temporary decommissioning to enable servicing and maintenance work, or

• Permanent decommissioningImportant!It is of paramount importance that a decommissioned solid fuel appliance is not left in a condition where the heat exchanger is sealed or partially sealed to the atmosphere, and there is potential for the appliance to be re-lit. There is a potential hazard and risk of explosion if such a situation exists.

Refer to Unit HTU11C notes on decommissioning appliances (p46 & 47).

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HTU12C

Biomass Appliance Service & Maintenance

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Requirements for the Routine Servicing of BiomassAppliances

• The documentation required to enable routine servicing and maintenance work (p2)

• Methods of safely isolating appliances prior to routine servicing and maintenance (p3)

• The typical routine servicing and maintenance requirements for biomass appliances

(Table 1, p5 & 6)• Manufacturer’s conditions of warranty.

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Requirements for the Routine Servicing of BiomassAppliances

• The documentation required to enable routine servicing and maintenance work (p2)

• Methods of safely isolating appliances prior to routine servicing and maintenance (p3)

• The typical routine servicing and maintenance requirements for biomass appliances

(Table 1, p5 & 6)• Manufacturer’s conditions of warranty.

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Methods of Safely Isolating Appliances Prior to Routine Servicing and Maintenance

Safe isolation from the electricity supply is a requirement under The Electricity at Work Regulations 1989 (EAWR).

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EAWR Regulation 4 - Systems, Work Activities & Protective Equipment

Work activities associated with electrical systems;• Paragraph 72 In the case of work of an electrical nature it is

preferable that the conductors be made dead before work starts. (See regulations 12, 13 and 14.) In such cases it is essential that the equipment be isolated (note that ‘isolation’ is defined in regulation 12(2) which will include securing by locking off etc; see also

• paragraph 75) and the conductors proved dead at the point of work before the work starts. Where a test instrument or voltage indicator is used for this purpose this device should itself be proved preferably immediately before and immediately after testing the conductors.

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Safe Electrical Isolation Procedure

Positive or Safe Electrical Isolation Procedure• Before testing a circuit, you need to ensure that the circuit is

dead and isolated from the supply.1. Locate and identify the circuit or equipment to be isolated

and the means of isolation (this could be the fuse or isolation switches).

2. Lock off the electrical supply and place a warning sign (e.g. ‘Safety electrician at work’).

3. Select an approved voltage indicator or test lamp.4. Check that the device is functioning correctly on a known

supply or a proving unit.5. Check the circuit or equipment to be worked on is dead

using the approved voltage indicator or test lamp. (Test line to earth, line to neutral, neutral to earth.)

6. Recheck the approved voltage indicator or test lamp on a known supply or proving unit.

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• The operation, maintenance and testing of electrical systems and equipment should be carried out only by those people who are competent for the particular class of work.

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Safe Isolation from the Fuel Supply

• Isolation of the fuel supply is unlike gas or oil where this fuel supply can be safely capped off.

• It may be physically necessary to prevent Solid fuel wood and biomass transfer of fuel from the store to the appliance.

• In addition, persons who may be or are in the vicinity should be advised that isolation is to take place/has taken place and warning signs/notices should be provided.

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Completion of a Typical Service and Maintenance Schedule

• Group Activity• Carry out Service & Maintenance checklist• Refer to Table 1 on pages 5-6.• Group discussion on outcomes.

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Completion of a Typical Service and Maintenance Schedule

• Group Activity• Group discussion on defects listed in Tables 2 -

8 on pages 8-14 of Unit 12 including diagnosis and rectification measures.

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Manufacturers warranty conditions

‘If the boiler has not been commissioned, or serviced by a competent person in accordance with the installation and servicing manual.’ then the manufacturer’s warranty shall be void

The RHI requires that a service plan is carried out on an annual basis.

MCS – MIS 3004 provides that installers encourage homeowners to have a service plan.

Source: Grant UK

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Fault Diagnosis and Rectification Considerations

• Description of the fault symptoms and recent system operation from the consumer.

• The system handover documentation including the appliance manufacturer’s installation and servicing instructions, system design and specification documents and commissioning records.

• Records of any previous inspection, service and maintenance activities undertaken.

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Seminar

Q&A Session on fault finding

List the information is required to be recorded on a maintenance report form on rectification

work? Refer to Unit 12 page 15.

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END OF COURSE

Thank you for attending the HETAS H005DE Training Course. If you would like further information on other courses or joining the HETAS CPS or MCS schemes for Biomass or Solar please contact HETAS or your training centre.

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Documents

1 Welcome!. 2 HTU11C Biomass Appliance Selection, Installation, Commissioning & Decommissioning