Technical guide VITOMAX 200 HS. Notes on design and operation. Vitotec technical guide folder, register 1. File in:

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1 VITOMX 200 HS Technical guide File in: Vitotec technical guide folder, register 1 Notes on design and operation Oil-/gas-fired high pressure steam boilers conforming to the requirements of the EC Pressure Vessel Directive and TRD regulations GB 10/2001

2 Contents Contents Page 1 Specification 1 Product information and operating conditions... 3 H Product information... 3 H Viessmann large boiler technology everything from one source... 3 H Operating conditions Notes on design and operation 2.1 General design considerations... 4 H Transport... 4 H Installation... 4 H Walk-on boiler cover... 5 H Boiler connections Flue gas... 6 H Flue gas systems Burner... 7 H Suitable burners... 7 H Fuels... 7 H Burner installation... 7 H Burner adjustment Standard values for water quality... 8 H Shutdown times Operation and maintenance... 9 H Commissioning... 9 H Instructing the system user... 9 H Operating tips... 9 H Operation checks... 9 H Testing steam boiler systems Safety equipment for H Constant attendance and incl. two-point water level control H 24- or 72-hour unattended operation with two-point water level control H 24- or 72-hour unattended operation with continuous water level control H Flue gas/water heat exchanger for feedwater heating with optional isolation, 24- or 72-hours unattended operation with continuous water level control H Wiring diagram for feedwater level control Safety regulations and requirements H pproval requirements H Regulations H Gas installation H Electrical installation H Operating instructions H Federal Emission ct (BlmSchG) H Checks as part of the Building Regulation approval process

3 1 Product information and operating conditions 1 Product information and operating conditions Product information Oil-/gas-fired high-pressure steam boiler conforming to the requirements of the EC Pressure Vessel Directive and TRD regulations. Three-pass boiler Boiler with large water chamber For producing saturated steam Steam rating to 22 t/h Permissible operating pressure (= safety pressure): 6, 8, 10, 13, 16, 18, 20, 22, 25 bar H High level of operational safety and long service life through wide water galleries and widely-spaced hot gas pipes. This spacing exceeds the minimum requirements of the FDBR guidelines. In addition, its large water content provides excellent natural circulation and a safe heat transfer. H Large steam chamber and large evaporator as well as integrated mist collector for improved steam quality. H Three-pass boiler with low combustion chamber loading ( 1.3 MW/m 3 ), for clean combustion and low nitrogen oxide emission. H Low radiation loss through 120 mm thick composite insulation, insulated flue-gas collector and water-cooled front wall. H Economical fuel consumption. Boiler efficiency depending on working pressure: up to 91%. H pproval acc. to the European Pressure Vessel Directive 97/23/EC or acc. to local regulations. H Low resistance on the flue gas side, through convection heating surfaces with large hot gas pipes. H Easy servicing through water-cooled reversing area without lining large cleaning doors burner trolley for boilers up to 6500 kw available as accessory for easier maintenance and simplified burner adjustment. H Walk-on covers on top of boilers are part of the standard equipment these simplify the installation and maintenance and protect the thermal insulation against accidental damage. H Feedwater pre-heating through a combination of flue-gas and water heat exchanger (on request). Increased energy utilisation of up to 5%. H The Vitocontrol control cabinet enables the regulation of all boiler-related control and regulating equipment. Optional components provide additional features, such as self-monitoring, fully automatic boiler operation with 24- or 72-hour unattended operation acc. to TRD 604. Large boiler technology everything from one source Tailor-made systems on request, we supply: H Boiler H Fittings H ccessories acc. to DIN 604 H Feedwater pumps mounted on one base frame H Combustion system H Control panels either mounted on the boiler or free standing H Electrical wiring between the control panel (if mounted on the boiler) and the boiler equipment H Flue gas/water heat exchanger H Boiler operating with ladder H Water treatment system H Superheater. Operating conditions These steam boilers should be equipped and operated in accordance with the Steam Boiler Order and the TRD guidelines. 3

4 2.1 General design considerations 2.1 General design considerations Transport Lifting eyes have been welded to the top of the boiler. The bottom rails, running over the length of the boiler, enable the boiler to be transported on rollers. Positioning The installation areas for steam boilers class IV should correspond to the TRD 403 guidelines. Steam boilers should not be installed H in, below, above or alongside living accommodation, or H in, under or above areas for social gatherings and workspaces. Excluded from this classification are rooms without a permanent workspace which are only rarely visited, control rooms and areas for associated machinery operated by boiler supervisors. Contrary to this ruling, steam boilers may be installed H in, below and above workspaces, H below, above or alongside living accommodation, H below and above areas for social gatherings, if the product derived from the water contents in litres and the permissible operating pressure in bar does not exceed a value of This also applies, if the product falls below a value of and H the permissible operating pressure is a maximum of 32 bar, H the water content is a maximum of l, H the permissible steam generation is a maximum of 2 t/h, and H the system has been equipped and tested in accordance with TRD 604, sheet 1, section 5. The boiler location must be kept free from frost and must be adequately ventilated. The boiler is mounted on longitudinal bottom rails. These rails may be placed onto the ground without further concrete foundations. Observe the installed burner height. However, to facilitate the cleaning of the boiler room it is appropriate to position the boiler on a plinth. nti-vibration boiler mounts may be placed underneath the bottom rails; they ensure perfect system function. The combustion system must be supplied with adequate volumes of air. ccordingtothe Sampleofa combustion order, the combustion air supply is deemed to have been verified if the installation location provides an opening to the outside which has a cross-section of at least 150 cm 2 and is 2cm 2 larger for every kw output above 50 kw rated output. Where an exhaust air aperture is provided or required, an exhaust air flow velocity of 0.5 m/s is assumed. 4

5 2.1 General notes on design Example of a boiler room acc. to TRD qr min *1 qt qe 7 1 High pressure steam generators 2 Burner 3 Control panel 4 Blow-down 5 Feed pump (observe the required inlet height during installation) 6 Flue pipe 7 Blow-down container 8 Spray circulation degasser (alternative to 9) 9 Feedwater tank qp Steam distributor qp Metering qw Water treatment qe Flue gas system qr Exhaust air aperture qt Ventilation aperture qw qq qp 9 8 *1 The required supply height depends on the feedwater temperature the type of feed pump the load pressure inside the feedwater tank. Walk-on boiler cover Vitomax 200 HS are supplied with a fitted walk-on boiler cover. On site, extension pieces and connection stays can be fitted to the boiler cover. When fitting heavy parts, first check with the factory to verify the stability of the walk-on covers. On request, tailor-made boiler platforms and ladders can be supplied. Boiler connections See the datasheet for the specifications of the boiler connections for steam, feedwater, safety valve and air venting valve. Flanges to which pipes are to be connected, are fitted with mating flanges. Connections which are not required for every application are fitted with stop ends. 5

6 2.2 Flue gas 2.2 Flue gas Flue gas systems Requirements for flue gas systems are contained in the sample combustion order dated September 1997, which forms the basis of the State Order and Combustion Order of each Federal State. ccordingly, the following are required: H Flue gas systems must be sized in clearance diameter and height and, where necessary, also according to the heat throughput resistance and the internal surface, so that the flue gases will be expelled to the outside under all operating conditions and so, that no dangerous pressures can be created in any rooms. H Flue gases from combustion equipment fired by liquid or gaseous fuels can be piped into chimney stacks or into flue pipes. H Flue pipes mounted on the side of buildings must be at least 20 cm away from windows. H Outlets from chimneys or flue pipes (see fig.) must be at least 40 cm higher than the roof ridge or be at least 1 m from the roof surface, or must be at least 1 m higher than roof mounted structures and openings to rooms, if their distance from chimneys and flue pipes is less than 1.5 m. or must be at least 1 m higher than open structural parts made from combustible material, except roof coverings, or be at least 1.5 m away from them. Further deviating requirements may apply if there is danger or unacceptable nuisance might develop. We recommend you seek the advice of your relevant district chimney sweep (or local authority). 1.0 m 1.0 m if then x a For combustion systems with a rated output of > 5 MW for fuel oil EL or > 10 MW for natural gas, an assessment accordingtot-luftandanemission assessment is required. Emission assessments are carried out by approved institutes m x 1.5 m 1.5 m 1.0 m 1.0 m a 6

7 2.3 Burner 2.3 Burner Suitable burners Oil-fired pressure jet burners The burner must be tested and certified in accordance with EN 267and must conform to TRD 411. Gas-fired pressure jet burner The burner must be tested in accordance with EN 676 and must be identified with the CE mark in accordance with EU guideline 90/396, it must furthermore conform to TRD 412. Oil-/gas-fired dual fuel burner Oil-/gas-fired dual fuel burners may also be used. Please note: Please check with us before using a burner H with rotating atomizer, H with flue gas re-circulation and H alternatives to the following fuels. The combustion chamber of this boiler operates at pressure. Use a burner which is suitable for the resistance on the hot gas side (see the specification supplied by the burner manufacturer). Note the additional resistances when using flue gas/water heat exchangers. The material of the burner head must be suitable for operating temperatures of at least 500 ºC. Fuels Oil: Fuel oil EL acc. to DIN or local standards. Gas: Natural and liquid petroleum gas in accordance with DVGW working sheet G 260/I and II or in accordance with local regulations. lternative fuels on request. Burner installation Steam output from t/h to t/h Blast tube aperture max. mm Minimum blast tube length mm Burner connection On request, the burner connection can be prepared in the factory. For this purpose, please state the burner make and type when ordering. Otherwise, a blank plate will be supplied whichmustbeprovidedonsitewiththe blast tube opening and the fastening holes. Burner adjustment djust the burner oil or gas throughput so that the stated maximum rated output of the boiler will not be exceeded. Burner versions You may use multi-stage or variable (modulating) burners. Three-stage burners require three separate pressure regulators. minimum output is not required. 7

8 2.4 Standard values for water quality 2.4 Standard values for water quality Carefully planned, implemented and monitored treatment of the boiler feed water is an important aspect of a steam generator system to ensure trouble-free and economic steam generation. It prolongs the life of the steam generator, the steam and condensate pipes and the corresponding fittings by reducing sludge losses, preventing corrosion in the steam and condensate piping, and gives an indication when the steam generator has scale deposits. Steam boilers must only be operated with suitable water. In any event, the cost of a water treatment facility is less than the cost of repairing damage to the steam boiler system. Most untreated water types are not suitable for use as boiler feed water in their original condition. The type of boiler feed water treatment required has to be matched to the raw water quality. s these properties can vary, occasional inspections are required, whereby at the very least the overall hardness of the water should be checked. The water feed pipe downstream of the boiler feedwater treatment should be equipped with a suitable water meter to record the quantity of replenishing water added to the return condensate. In any case it is advisable to feed back as much condensate to the feedwater tank as possible. The condensate may need to be treated, in order to make it conform to boiler feedwater regulatory requirements (according to the table below). These regulations, which also affect the quality of the boiler water, require that a suitable treatment system should be installed, depending on the raw water quality and the quantity of replenishing water. t the very least, a water softening system should be installed. Furthermore, the supply to the feedwater tank should provide the possibility of adding oxygen binders (possibly alkalinization agents and phosphates). The water should be monitored using suitable and preferably uncomplicated devices (either daily or weekly depending on the mode of operation) to make certain that requirements are being met. These actual values: the quantity of replenishing water, the chemical consumption and the required maintenance, should be entered into the system log to ensure optimum operating conditions. Maintaining the following requirements is necessary to safeguard your warranty rights. The manufacturer s warranty excludes damage due to corrosion and scaling. Requirements to be satisfied by the boiler feedwater Max. operating pressure bar >1to 22 General requirements Colourless, clear and free from undissolved substances ph value at 25 ºC >9 El. conductivity at 25 ºC ms/cm Only standard values applicable to boiler water Total alkaline earths (Ca 2+ +Mg 2+ ) Oxygen (O 2 ) Carbon dioxide (CO 2 ) bound Iron, total (Fe) Copper, total (Cu) Oxidisability (Mn VII Mn II) as KMnO 4 Oil, grease mmol/litre mg/litre mg/litre mg/litre mg/litre mg/litre mg/litre < <0.02 <25 <0.05 <0.01 <10 <1 Requirements to be satisfied by the boiler water Max. operating pressure bar >1to 22 General requirements ph value at 25 ºC cid capacity (K S8.2 ) El. conductivity at 25 ºC Phosphate (PO 4 ) mmol/litre ms/cm mg/litre The addition of phosphate is recommended, but is not always essential. Conversion: 1 mol/m 3 =5.6ºdH; 1 ºdH = mol/m 3 ; 1 mval/kg = 2.8 ºdH Colourless, clear and free from undissolved substances 10.5 to 12 1to12 < to 20 For further information see the Technical Guide Standard values for water quality and VdTÜV code of practice Shutdown times The hot gas surfaces of the boiler should be thoroughly cleaned if the boiler is to be taken out of use for prolonged periods. Preserve these surfaces afterwards with a preserving oil mixed with graphite. For the protection of the waterside, a flooding of the boiler with degassed, oxygen-free and treated low-salt content water with added oxygen binders (e.g. sodium sulphite) is recommended. Then close the steam shut-off valve. Check the oxygen binder concentration at least monthly and replenish, if necessary. For further information see the operating instruction Conserving the heating water and hot gas side of your boiler system (available upon request). 8

9 2.5 Operation and maintenance 2.5 Operation and maintenance Initial start-up steam boiler system Class IV may only betakenintouse,accordingtothesteam Boiler Order, if the responsible body (e.g. TÜV) has inspected the system and the appropriate authority is in possession of the relevant approval. Instructing the system user The contractor who installed this system must hand over the operating instructions for this system to the user and instruct him/her in its use as well as in maintaining the system log. The system must be commissioned by the system builder or a qualified person authorised by the installer as well as the relevant TÜV, or local authority. Record all actual values in a commissioning report, which must be confirmed by the system installer and user. Operating tips The boiler design enables unattended operation. We would, therefore, recommend that the boiler should be constantly operated at the required operating pressure. The boiler may still be operated at pressure, even if no heat demand occurs for a longer period of time. In systems comprising several boilers, of which one is constantly used as a standby boiler, the operation should only be changed over in longer intervals, e. g. during the annual inspection of the total system. Preserve the standby boiler similar to boilers taken out of use for longer periods. Inspections of steam boiler systems In accordance with the Steam Boiler Order, the outside of steam boilers class IV must be inspected annually and the inside at least every three years. water pressure test must be carried out every nine years. ccording to TRD 604, sheet 1, section 4.1, all control and safety equipment must be checked every six months. These expert inspections can be arranged with Viessmann. Operational checks Implement checks in accordance with TRD 601, sheet 1. 9

10 2.6 Safety equipment 2.6 Safety equipment Safety equipment acc. to TRD 401 H with constant attendance H and with two-point water level control Steam boiler system Legends DR DR M DB RS ELV WR WB D WS SIV RV RV BV Desalination valve (manual setting) RS Fitting base SV Blow-down quick-acting valve with handle D Steam shut-off valve DB Maximum pressure limiter DR Pressure regulator ELV ir vent valve M Pressure gauge P Feedwater pump RV Non-return valve SF Dirt trap SIV Safety valve Feedwater valve WB Water level limiter WR Water level control WS Water level indicator X Sampling cooler Vitocontrol control panel BV,X P SF SV Basic equipment H Pressure regulator H Safety valve H Feedwater pump *1 ( times volume flow, times head) H Device to prevent feedwater return H Visible marker for lowest water level marker (LW) H 2 water level indicators *2 H Water level limiter H Water level control H Pressure gauge with test valve H Blow-down quick-acting valve with handle H Steam shut-off valve H Feedwater valve Recommended accessories H Desalination valve H Sampling cooler H Pressure limiter H ir vent valve *1 ccording to regulations, only one pump is required. *2 One of the two water level indicators can be replaced by an approved water level control or water level limiter which, at least indirectly, indicates the water level. 10

11 2.6 Safety equipment Safety equipment acc. to TRD 401 and 604, sheet 1 H for 24- or 72-hour unattended operation H and with two-point water level control Steam boiler system Legends DR DR M DB RS ELV WR HWB SIV WB WB D WS LFE BV,X MV SF2 RV RV P SF1 BV Desalination valve RS Fitting base SV Blow-down quick-acting valve with diaphragm drive D Steam shut-off valve DB Maximum pressure limiter DR Pressure regulator ELV ir vent valve HWB Maximum water level limiter LFE Conductivity electrode M Pressure gauge MV Control valve (3-way solenoid valve) P Feedwater pump RV Non-return valve SF1 Dirt trap SF2 Dirt filter SIV Safety valve Feedwater valve WB Water level limiter WR Water level control WS Water level indicator X Sampling cooler Vitocontrol control panel with interlock switches according to TRD 604 for unattended operation SV Basic equipment 24-hour operation H s per page 10 H s water level limiter and water level control: multi-electrode in conjunction with a control device for self-monitoring low water level limiter with interval water level control and high level water limiter. H Level electrode with control device as second low water level limiter H Pressure limiter 72-hour operation H s for 24-hour operation and additional H automatic T.D.S. unit comprising: conductivity electrode, desalination control, desalination valve and limit switch. Recommended accessories for 24- or 72-hour operation H utomatic blow-down equipment comprising: blow-down quick-acting valve with diaphragm drive for compressed air and pressured water, 3-way solenoid valve with dirt filter and blow-down pulse generator. H Sampling cooler H ir vent valve Please note: The safety equipment of high pressure steam boilers, which are to be operated in accordance with TRD 604, sheet 1 (unattended operation), must be determined by the relevant TÜV (or relevant local body) and be authorised by the appropriate authority before their deployment. 11

12 2.6 Safety equipment Safety equipment according to TRD 401 and 604, sheet 1 H for 24- or 72-hour unattended operation H and continuous water level control Steam boiler system Legends DR DR M DB RS ELV D HWB WR WB LFE WB WS MV SIV BV,X1 SF2 STV RV *1 X2 RV P SF1 BV Desalination valve RS Fitting base SV Blow-down quick-acting valve with diaphragm drive D Steam shut-off valve DB Maximum pressure limiter DR Pressure regulator ELV ir vent valve HWB Maximum water level limiter LFE Conductivity electrode M Pressure gauge MV Control valve (3-way solenoid valve) P Feedwater pump RV Non-return valve SF1 Dirt trap SF2 Dirt filter SIV Safety valve STV ctuator valve Feedwater valve WB Water level limiter WR Water level control, continuous WS Water level indicator X1 Sampling cooler X2 *1 Overflow equipment to the feedwater container SV Vitocontrol control panel with interlock switches according to TRD 604 for unattended operation *1 The overflow equipment may be omitted, if the electrical control corresponds to the wiring diagram on page 14. Basic equipment 24-hour operation H s per page 10 however, with H continuous water level control H water level limiter Special type incl. max. water level limiter, comprising: combination electrode and level switch H water level limiter Special type incl. low water level limiter, combined with a water level control, comprising: combination electrode, level switch and level control H actuator valve for feedwater supply H pressure limiter 72-hour operation H s for 24-hour operation and additional H max. water level limiter H automatic T.D.S. unit comprising: conductivity electrode, desalination control, desalination valve and limit switch Recommended accessories for 24- or 72-hour operation H utomatic blow-down equipment comprising: blow-down quick-acting valve with diaphragm drive for compressed air and pressured water, 3-way solenoid valve with dirt filter and blow-down pulse generator. H Sampling cooler H ir vent valve Please note: The safety equipment of high pressure steam boilers, which are to be operated in accordance with TRD 604, sheet 1 (unattended operation), must be determined by the relevant TÜV (or relevant local body) and be authorised by the appropriate authority before their deployment. 12

13 2.6 Safety equipment Safety equipment according to TRD 401 and 604, sheet 1 H with flue gas/water heat exchanger for feedwater heating with optional isolation H for 24- or 72-hour unattended operation H and continuous water level control Steam boiler system Legends DRD M DB DR ELV RS D B HWB WR WB LFE SV WB WS BV,X1 MV SIV SF2 TH TH ELV RV C STV M E X2 *1 RV P SF1 BV Desalination valve RS Fitting base SV Blow-down quick-acting valve with diaphragm drive D Steam shut-off valve D Pressure absorber (modulating) DB Maximum pressure limiter DR Pressure regulator E Drain connection ELV ir vent valve HWB Maximum water level limiter LFE Conductivity electrode M Pressure gauge MV Control valve (3-way solenoid valve) P Feedwater pump RV Non-return valve SF1 Dirt trap SF2 Dirt filter SIV Safety valve STV ctuator valve Feedwater valve TH Thermometer WB Water level limiter WR Water level regulator, continuous WS Water level indicator X1 Sampling cooler X2 *1 Overflow equipment to the feedwater container B C Vitocontrol control panel with interlock switches according to TRD 604 for unattended operation Steam boiler Flue gas/water heat exchanger *1 The overflow equipment may be omitted, if the electrical control corresponds to the wiring diagram on page 14. Basic equipment 24-hour operation H s per page 10 however, with H continuous water level control H water level limiter Special type incl. max. water level limiter, comprising: combination electrode and level switch H water level limiter Special type incl. low water level limiter, combined with a water level control, comprising: combination electrode and level switch and level control H actuator valve for feedwater supply H pressure limiter 72-hour operation H s for 24-hour operation and additional H max. water level limiter H automatic T.D.S. unit comprising: conductivity electrode, desalination control, desalination valve and limit switch H sampling cooler H air vent valve Recommended accessories for 24- or 72-hour operation utomatic blow-down equipment comprising: blow-down quick-acting valve with diaphragm drive for compressed air and pressured water, 3-way solenoid valve with dirt filter and blow-down pulse generator. Please note: The safety equipment of high pressure steam boilers, which are to be operated in accordance with TRD 604, sheet 1 (unattended operation), must be determined by the relevant TÜV (or relevant local body) and be authorised by the appropriate authority before their deployment. 13

14 2.6 Safety equipment Electrical wiring diagram for feedwater level control with max. water level limitation, boil-dry protection and to reduce steam knocking inside the flue gas/water heat exchangers during operation at low loads L L 3 5 N B 33 S1 K1 34 KS K1 44 E 95/97 N 3 2 C D M K5 H2 F K1 K2 K K1 H K K4 28 K4 18 K3 21 K2 21 K2 22 K3 22 Level control GESTR NRR 2-2 B Switch S1 Position 0: Off Position 1: Manual Position 2: uto C Level electrode GESTR NRG 26 D Motor actuator drive E Optional connection boil-dry protection 14

15 2.7 Safety regulations and requirements 2.7 Safety regulations and requirements pproval requirement In accordance with the Steam Boiler Order, the installation and operation of steam boiler systems, class IV, requires a permit from the appropriate authority. pply for this permit using the standard forms provided, either at your local TÜV or the appropriate authority. steam boiler system may only be commissioned following installation or major alteration, if the system has been accepted by an appropriate engineer. ll safety equipment and the compliance of the system with the details contained within the approval certificate will be checked as part of this acceptance procedure. The acceptance engineer will issue a test certificate. Requirements Steam boilers, class IV, will be constructed in accordance with TRD guidelines, and must be equipped and operated according to the relevant guidelines. Essentially, the following TRD guidelines apply: General H TRD 001: Structure and application of TRD. H TRD 001, appendix 1: Summary of important standards, codes of practice etc. H TRD 001, appendix 2: Overview of the TRD regulations. Materials H TRD 110: Fitting case. Equipment and installation H TRD 401: Equipment for steam generators class IV. H TRD 403: Installation of steam boilers. H TRD 411: Oil-fired burners for steam boilers. H TRD 412: Gas-fired burners for steam boilers. H TRD 421: Safety equipment to prevent overpressure safety valves for steam boilers class I, III and IV Testing H TRD 520: Guideline for the approval procedure and operation as well as the notification procedure for steam boiler systems. Operation H TRD 601, sheet 1: Operation of steam boiler systems H TRD 602, sheet 1: Limited attendance of steam boiler systems for steam generators, class IV. H TRD 603, sheet 1: Intermittent operation of a steam boiler system with a steam generator, class IV, with reduced pressure and unattended operation. H TRD 604, sheet 1: Operating steam boiler systems with steam generators, class IV, for unattended operation. H TRD 611: Feedwater and boiler water for steam generators, class IV. During installation and commissioning, observe all local Building Regulations and regulations concerning combustion systems, as well as the following standards, regulations and guidelines: H DIN 4705: Calculating chimney dimensions. H DIN 18160: Domestic chimneys. When using oil-fired combustion systems H DIN : Oil combustion in heating systems. Safety equipment requirements. H DIN : Oil combustion, fuel oil-supply, safety equipment requirements, testing. H DIN : Oil-fired burner (above 100 kg/h throughput). H DIN : Liquid fuels; fuel oil EL, minimum requirements. H DIN EN 230: Vaporizing oil burner as mono-block version equipment for safety, monitoring and control as well as safety periods. H DIN EN 267: Mono-block vaporizing oil burner. When using oil-fired combustion systems H DIN 4756: Gas combustion in heating systems. Construction, design and principles of safety equipment. H DIN EN 298: utomatic firing systems for gas burners and pressurised or atmospheric gas-fired devices. H DIN EN 676: Pressurised gas-fired burners. H DVGW TRGI 1986, issue 1996: Technical rules for gas installations. H DVGW working sheet G 260/I and II: Technical rules for gas quality. H TRF 1996: Technical rules for LPG. 15

16 2.7 Safety regulations and requirements Gas installation The gas installation should be carried out by the registered installer in accordance with the technical connection requirements stipulated by the gas supply company. Operate the system in accordance with the above conditions. Electrical installation The electrical connection and installation should be carried out in accordance with VDE regulations (DIN-VDE 0100 and DIN VDE 0116) and the technical connection requirements laid down by your local electricity supplier. H DIN VDE 0100: Installation of HV systems with rated voltages up to 1000 V. H DIN VDE 0116: Electrical equipment for combustion systems. Operating instructions ccording to TRD 509, section (11), the system installer must produce operating instructions for the whole system. Federal Emission Law (BImSchG) Checks as part of the Building Regulation approval process Combustion systems must be operated so that the limits stated in the 1st BlmSchV and in T Luft for the appendices listed in the 4th BlmSchV will not be exceeded. The State Building Regulations, their implementation orders and the combustion equipment orders as well as the general building approvals and permits of the higher supervisory authority, in individual cases, are part of the Building Regulations requirements. Printed on environmentally friendly, chlorine -free bleached paper. Subject to technical modifications. Viessmann Werke GmbH&Co D llendorf Tel: (06452) 70-0 Fax: (06452) Viessmann Limited Hortonwood 32, Telford Shropshire, TF1 4EU, GB Tel: (01952) Fax: (01952)