SupeRAC-AR Installation, Operating and Service Manual
Contents
1. Handling Scope of Supply Models up to and including 900AR are supplied with the control panel insulating blankets ceramic fibre packing material for sealing around the burner blast tube and documentation packed inside the combustion chamber The casing and burner assembly are supplied in separate cartons Models 1100AR to 3600AR are factory pre insulated and have their casing panels fitted the control panel documentation and ceramic fibre packing material for sealing around the burner blast tube is packed inside the combustion chamber The boilers are equipped with lifting eyes to assist with the moving and handling of the boiler body Installation Location The location chosen for the installation of the boiler s must be flat and level to facilitate correct alignment of connections and must be capable of supporting the units when full of water The floor or plinth must be fireproof in accordance with BS 6644 The plant room must have sufficient space for the installation of the boilers associated pipework pumps controls flues ventilation and with due allowance to access and servicing of other pieces of equipment Adequate space must be provided around the boiler to allow the removal of the burner and opening of the combustion chamber door and removing the flue baffles Combustion chamber door opening and adjustment The door can be opened from both sides except for models 2580AR 3600AR The doors are normally supplie2. then the controls must include a low gas pressure cut off device at the inlet to the booster It may be necessary to install a governor between the booster and the burner gas train should the inlet pressure to the gas train exceed 50mbar The oil storage and supply system should be designed and installed in accordance with BS 5410 Part 2 If liquid bio fuel is being used ensure all components are suitable for such use Liquid bio fuel must be in accordance with BS EN 1423 The oil supply pipe between storage tank and burner should be installed using copper steel or aluminium pipe and fittings Galvanised pipes are not considered suitable The oil supply pipe should terminate adjacent to the burner with an isolating valve and should include metal bowl type filter Fitting the case Models 80AR 900AR See Fig 1 It is advised to complete the installation of the boiler before fitting the casing and control panel assembly Wrap the insulating blanket 1 around the drum of the boiler body making cuts apertures for the flow and return pipes as necessary Retain the insulation in place using the securing bands Next fit the left hand side casing panel 3 by locating the lower retaining bracket of the panel inside the lower lateral rail of the boiler body assembly and then hook the top part of the panel on to the upper structural rail of the boiler body Repeat for the right hand side panel 2 Temporarily position the top cover pan
3. 3 01 3 61 421 4 73 54 6 01 726 851 9 76 10 95 Hydraulic resistance At 10K kPa 1 01 1 26 265 155 225 366 516 695 404 494 629 404 5461 74 8 98 Hydraulic resistance At 15K kPa 045 056 118 069 1 1 63 23 3 1 18 22 28 18 25 33 4 Hydraulic resistance At 20K kPa 025 032 066 039 056 092 129 174 101 124 158 101 14 185 224 7 Nominal flue gas mass Nat Gas kg h 139 156 226 289 345 429 516 599 674 769 854 1031 1208 1386 1557 Nominal flue gas mass Oil kg h 132 148 215 275 328 408 491 571 641 732 813 982 1150 1319 1482 Nominal flue gas temp Nat Gas C 105 Nominal flue gas temp Oil C 135 Nom Min Flue Draught Pa 10 Water content litres 119 119 155 228 228 285 276 329 402 402 476 697 795 733 817 Weight empty kg 250 270 310 460 480 540 550 610 870 80 940 1310 1380 1440 1620 Weight full kg 369 389 465 688 708 825 826 939 1272 1292 1416 2007 2175 2173 2437 Shunt recirculation flow rate l s 25 30 of Design Flow Rate Max working pressure bar 5 8 upon request 6 8 or 10 upon request SupeRAC AR Models 1100 3600 Model SupeRAC AR 1100 1300 1640 1850 2050 2580 3100 3600 Nominal output kw 1100 1300 1645 1850 2050 2580 3100 3610 Input net kW 1155 1365 1727 1942 2153 2709 3255 3791 Fuel consumption Nat Gas G20 m3 h 120 18 142 04 179 71 202 08 224 04 281 89 338 71 394 49 Fuel consumption 35 sec Oil kg h 97 27 114 96 145 45 163 56 181 33 228 15 274 14 319 28 Combustion chamber resistance mbar 54 5 6 5 8 6 65 68 75 84 Max flow temperature C 90 Min return temper
4. boilers throughout the United Kingdom For advice or more information please contact your local sales representative or our head office via 01268 546700 or via our website www mhsboilers com 6 MHS Boilers 11 09 2012 SupeRAC AR For Models 80 to 3600 This document The present documentation has been prepared with the following target groups in mind The technical consultant The installer The maintenance technician The user MHS Boilers Ltd has opted to make the technical documentation as comprehensive as possible in the form of this book in order to ensure that these target groups have all the information they need As the supplier we would be happy to help you in connection with any additional information that you may require This document covers the following aspects relating to the boilers General description Technical specifications Requirements for design and installation Maintenance instructions The operating instructions for the user have been affixed to the appliance itself Service For commissioning and assistance in maintenance matters please contact the Services Department via 01268 546770 General restrictions MHS Boilers Ltd products should always be used installed and maintained in accordance with the statutory requirements specifications and standards applicable to these installations All the data information and suggestions concerning its products provided by MHS Boilers Ltd are based o
5. fitted oil fired burner Check security and condition of flexible fuel lines oil fired burner Check electrode condition positioning and gaps as specified in the burner manufacturer s instructions Make burner pre settings for head positioning and air settings Attach oil pressure gauge to burner oil pump oil fired burner Ensure temperature controls are calling for heat Turn on fuel supply at isolating valve MHS Boilers 11 09 2012 SupeRAC AR For Models 80 to 3600 Turn on boiler at isolator and on off on boiler control panel the burner should start its start up and ignition process Check gas train gas burner and any pipework between isolating valve and burner connection for leakage Check oil lines oil connections for soundness oil burner Adjust burner in accordance with the burner manufacturer s instructions and allow the burner to stabilise for approximately 10 15 minutes following which take measurements of combustion gases fuel throughput gas burner and making any further adjustments as necessary Record measurements Switch off boiler remove any gauges and refit test points Restart stop boiler several times to check integrity of ignition system Check combustion chamber door for correct sealing Check flue joints for integrity Check water connections for soundness For gas fired burner only with burner firing turn off gas supply and ensure burner goes to lockout Wait 45 seconds turn o
6. 940 940 940 940 940 1040 1040 1040 1240 1240 1240 1240 B mm 1110 1110 1360 1405 1405 1655 1655 1905 1990 1990 2290 2345 2545 2545 2795 H mm 880 880 880 990 990 990 990 990 1150 1150 1150 1280 1280 1280 1280 R Al mm 750 750 750 900 900 900 900 900 1000 1000 1000 1200 1200 1200 1200 Dimensions B1 mm 760 760 1010 1010 1010 1260 1260 1510 1512 1512 1812 1814 2014 2014 2264 d mm 460 460 460 510 510 510 510 510 595 595 595 640 640 640 640 e mm 430 430 430 465 465 465 465 465 625 625 625 625 625 625 625 f mm 260 260 510 450 450 700 700 950 792 792 1092 974 1174 1174 1424 r mDN 2 2 65 65 65 65 65 80 80 80 100 100 100 100 v DN 1 1 1 1 1 14 1 14 2 65 65 65 65 Connections _ aa a a a a a a a e a i R t a a a S a s DN Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y mm 200 200 200 220 220 220 220 220 250 250 250 350 350 350 350 Model SupeRAC AR 1100 1300 1640 1850 2050 2580 3100 3600 A mm 1380 1380 1610 1610 1610 1800 1800 2000 B mm 2950 3200 3245 3385 3535 3955 4255 4790 H mm 1500 1500 1800 1800 1800 2000 2000 2210 Dimendions Al mm 1380 1380 1610 1610 1610 1800 1800 2000 B1 mm 2416 2666 2680 2820 2970 3320 3620 4024 d mm 810 810 965 965 965 1070 1070 1700 e mm 430 430 430 430 430 510 510 522 f mm 1700 1950 1440 1580 1730 1700 2000 2200 r m DN 125 125 150 150 150 200 200 200 N v DN 80 80 100 100 100 125 125 125 s DN 1 1 1 1 1 1 1 1 D mm 400 400 450 450 450 500 500 600 8 MHS Boilers 11 09 2012 SupeRAC AR For Models 80 to 3600
7. AC AR For Models 80 to 3600 General Description The SupeRAC AR series of boilers are reversed flame three pass forced draught combustion type carbon steel shell and tube appliances Suitable for use with appropriate power flame burners with Natural Gas LPG Light or Heavy Fuel Oil or Biodiesel 23 models in the range with outputs from 81kW to 3610kW with efficiencies gt 94 Working pressure 6bar or upon request to special order either 8bar or 10bar SupeRAC AR Models 80AR 900AR SupeRAC AR Models 1100AR 3600AR 3 MHS Boilers 11 09 2012 SupeRAC AR For Models 80 to 3600 Technical data SupeRAC AR Models 80 900 Model SupeRAC AR 80 90 130 170 200 250 300 350 400 450 500 600 700 800 900 Nominal output kw 81 91 132 170 203 253 304 354 398 455 505 610 715 820 920 Input ne O WwW 862 967 140 1796 214 266 320 372 418 477 530 640 750 860 6 Fuel consumption Nat Gas G20 m h 8 97 1007 1458 187 2229 2771 3333 38 75 4354 4969 55 21 6667 7813 8959 100 63 Fuel consumption 35 sec Oil kg h 7 26 814 11 79 15 13 1803 2241 2696 31 34 3522 40 19 4466 5393 632 7247 814 Combustion chamber resistance mbar 0 4 0 5 0 9 09 1 2 18 25 33 27 3 2 3 7 3 6 45 44 48 Max flow temperature E 9 Min return temperature C 60 Design flow rate At1OK Vs 192 216 314 404 483 602 723 842 947 1083 1202 1452 1702 1952 219 Design flow rate At 15K l s 1 28 144 209 269 322 401 482 5461 6 31 722 801 968 11 34 1301 146 Design flow rate At 20K l s 0 96 108 157 202 241
8. MHS elco SILER SupeRAC AR Installation Operating and Service Manual High Performance Reversed Flame 3 Pass High Efficiency Steel Shell amp Tube Type Hot Water Boiler MHS Boilers Ltd 3 Juniper West Fenton Way Basildon Essex SS15 6SJ Main Tel 01268 546700 Spares Tel 01268 546771 Service Tel 01268 546770 Technical Help 01268 545772 Fax 01268 888270 WWW MHSBOILERS COM L318 SupeRAC AR For Models 80 to 3600 CONTENTS General IOS oct PO o E erae i page 3 Eagle Es IP A acc esis ac otica A tonnanei ihein Eiir niini ni page 4 General regulation page 5 Clearances e ias page 7 DIMENSIONS trar dd page 8 PP e tapimandacenateaduatuctieesas page 9 Installation page 9 A E nacn manne page 9 Combustion chamber door opening and adjustmen t page 9 A inini eE EE iN page 10 Prevention of condensatiON ccccccccnnonooccncnnnccconannnnncnncnonannnnas page 10 Fuel SUPPI oca EERE Ea Ey page 11 Fitting the case models 80AR 900 ooocccccconancconocancccnocacacocenins page 11 Mounting the control panel models 1220 3600 page 12 PUSO usa an opone li iecia page 12 System water oo APP page 13 Control panel SCM comes iainits page 14 Preliminary CHOOSE page 15 First siatt UD eriaren a Ea EPE Eea page 15 User PSU UAIS cincel rra ella asar page 16 Operation SON eae cc acca sc ccccshteciieczeaeeaetehaceceseveasieats page 16 Notes page 18 MHS Boilers 11 09 2012 SupeR
9. ater heating systems of output greater than 45kW Parts 1 2 amp 3 BS 6891 2005 A2 2008 Specification for installation of low pressure gas pipework of up to 35mm R11 4 in domestic premises 2 family gases BS 7593 2006 Code of Practice for treatment of water in domestic hot water central heating systems BS 7671 2008 Requirements for electrical installations IEE Wiring Regulations Seventeenth Edition BS EN 12828 2003 Heating systems in buildings Design for water based heating systems CISBE Guide reference sections B7 B11 and B13 CP342 Part 2 1974 Code of Practice for centralized hot water supply IGE UP 1 or 1A Gas Tightness Testing amp Purging of Commercial Industrial Gas Installations IGE UP 2 Gas installation pipework boosters and compressors on Industrial and Commercial premises IGE UP 4 Commissioning of gas fired plant on industrial and commercial premises IG UP 10 edition 3 Installation of gas appliances in Industrial and Commercial premises Part 1 Flued appliances Through their unique construction the SupeRac Boiler range of central heating units are renowned for their High thermal output Durability Can be supplied in a wide range of models Through active and market oriented research MHS Boilers Ltd is in a position to offer solutions for the most challenging heating requirements The supplier MHS Boilers Ltd are proud to supply and technically support the SupeRac AR Boiler Range of
10. ature G 60 Design flow rate At 10K l s 26 19 30 95 39 16 44 04 48 8 61 42 738 85 95 Design flow rate At 15K l s 17 46 20 63 26 11 29 36 32 53 40 95 49 2 57 3 Design flow rate At 20K ls 13 09 15 47 19 58 23 11 25 63 30 71 36 9 42 97 Hydraulic resistance At 10K kPa 8 1 12 2 10 1 13 1 15 7 143 20 2 26 9 Hydraulic resistance At 15K kPa 3 6 5 4 45 5 8 7 64 9 12 Hydraulic resistance At 20K kPa 2 02 3 05 25 3 2 3 9 35 5 05 6 7 Nominal flue gas mass NatGas kg h 18622201 2785 O aa 3471 4368 5248 613 Nominal flue gas mass Oil kg h 1769 2090 2645 2974 3297 4148 4984 5805 Nominal flue gas temp Nat Gas C 105 Nominal flue gas temp Oil ys 135 Nom Min Flue Draught Pa 10 Water content litres 1277 1372 2010 2125 2163 3155 3292 4839 Weight empty kg 2200 2580 3300 3640 3710 5280 5760 7490 Weight full kg 347 3952 ao 5765 BB7A 5 aoa 12329 Shunt recirculation flow rate l s 25 30 of Design Flow Rate Max working pressure bar 6 8 or 10 upon request MHS Boilers 11 09 2012 SupeRAC AR For Models 80 to 3600 General regulations This documentation contains important information which is a base for safe and reliable installation commissioning and operation of the SupeRac AR Boiler All activities described in this document may only be executed by authorized companies Changes to this document may be effected without prior notice We accept no obligation to adapt previously delivered products to incorporate such changes Only original spare parts may be us
11. d opening from left to right To open the door remove the fixing nuts from the left hand side To reverse the direction of opening of the combustion chamber door it will be necessary due to the size and weight of door to utilise lifting gear e Attach lifting gear via the two holes in the upper part of the door assembly e Remove the 4 door retaining nuts e Carefully remove the door assembly and set to one side e Remove the jam nuts from the tie rods on the left hand side and transfer them to the rods at the right hand side positioning them approximately the same as when on the left hand ties rods e Carefully offer up the door assembly and remount onto the tie rods and retain using previously removed nuts Release and remove any lifting aids equipment 9 MHS Boilers 11 09 2012 SupeRAC AR For Models 80 to 3600 To adjust and tighten the door e Slightly slacken back the jam nuts e Tighten the door evenly onto the front of the boiler body using the door retaining nuts capstans to form a gas tight seal e Re tighten as necessary the jam nuts back against the bush seating on the door assembly e Proceed to mount the burner following which check and adjust as necessary the fitting of the combustion chamber door against the boiler body Burner mounting Follow carefully the instructions supplied with burner The burner mounting plate must be cut and drilled as appropriate to the dimensions of the burner to be utilised It is e
12. ed when replacing components on the boiler otherwise warranty will be void Application The SupeRac AR Boiler may be used for heating and hot water production purposes only The boiler should be connected to closed systems with a maximum temperature of 100 C high limit temperature maximum set point temperature is 90 C Norms and regulations When installing and operating the boiler all applicable norms European and local should be fulfilled e Local Building regulations for installing combustion air and flue gas systems e Regulation for connecting the boiler to the electrical appliance e Regulations for connecting the boiler to the local gas network Norms and regulations according to safety equipment for heating systems Any additional local laws regulations with regard to installing and operating heating systems 92 42 EEC Boiler efficiency directive 90 396 EEC Gas appliance directive 73 23 EEC Low voltage directive 89 336 EEC EMC directive EN 656 Gas fired central heating boilers Type B boilers of nominal heat input exceeding 70 kW but not exceeding 300 kW EN 15420 Gas fired central heating boilers Type C boilers of nominal heat input exceeding 70 kW but not exceeding 1000 kW EN 15417 Gas fired central heating boilers Specific requirements for condensing boilers with a nominal heat input greater than 70 kW but not exceeding 1000 kW EN 13836 Gas fired central heating boilers T
13. efore first firing Check that control panel instrument bulbs are correctly positioned in the thermostat pockets Ensure that the flue tube turbulators do not protrude from the front of the tubes and that no foreign objects are within the combustion chamber Check that any gaps between the burner blast tube and the combustion chamber door have been filled using high temperature ceramic fibre material Check that the system has been filled with water and is vented and that the pressure is above 1bar and within the maximum limits of the plant Ensure that an appropriately rated safety relief valve has been fitted and where necessary a pressure limiter Check that combustion chamber door has been closed correctly Check that pumps rotate freely and in the correct direction Check fuel supplies have been appropriately tested for soundness have been purged vented and the fuel control valve is closed Ask to view certificates Gas supplies should be tested and purged in accordance IGE UP 1 or IGE UP 1A as appropriate Check that the ventilation provision meets with the appropriate standards Check that the power supply is of the appropriate rating and adequately fused and that an isolator is positioned adjacent to the boiler Ensure a heat load is available Check that flue pipe is securely connected sealed onto appliance First start up Refer to the instructions supplied with the burner Check that appropriate sized nozzles have been
14. els 4 amp 5 on to the top of the boiler unpack the control panel 6 and carefully extend the capillary tubes of the thermostats etc and pass them through the hole in the top cover panel 4 Insert the sensing bulbs of the instrument capillaries into the thermostat pockets adjacent to the flow pipe tube on the top of the boiler Secure the control panel to the top cover panel 4 and then finally locate the top casing panels 11 MHS Boilers 11 09 2012 SupeRAC AR For Models 80 to 3600 Fig 1 Mounting the control panel Models 1220 4070 Mount the control panel using the supplied bracket on to the casing at a suitable and convenient location on the top or side of the boiler casing panels The instrument capillaries must be carefully extended and located into the thermostat pockets adjacent to the flow pipe assembly on the boiler body Flue system SupeRAC Boilers are suitable for open flue type installations B23 taking air for combustion from the room in which it is installed the boiler plant room must be suitably ventilated to BS6644 The flue pipe and components serving the SupeRAC boiler must be suitable for working temperatures of not less than 250 C and should be thermally insulated The route of the flue short be as short as possible and sized appropriately to ensure complete evacuation of combustion gases without causing excessive back pressure The flue should generate sufficient draught to overcome its own resi
15. n careful study However the use installation and operation of the same are outside the control of MHS Boilers Ltd and neither MHS Boilers Ltd nor any other organisations associated with it accept any liability for the same Clearances Sufficient space must be allowed as necessary at the rear of the boiler for connection of the flue components and access to the flue collector hood clean out port A minimum of 450mm must be allowed at either side of the boiler s with attention being paid to the space required to fully open the combustion chamber door with the burner mounted upon it Clearance at the front of the boiler must allow for cleaning of the flue tubes which run horizontally for the entire length of the boiler minus the thickness of the combustion chamber door and the depth of the flue collector hood The clearance required at the front measured from the front of the boiler body excluding the door must not be less than dimension B1 in the following tables 7 MHS Boilers 11 09 2012 SupeRAC AR For Models 80 to 3600 Dimensions SupeRAC AR Models 80 3600 A 1 Boiler shell 4 Combustion chamber 7 Cleaning access m Flow connection 2 Combustion viewing port 8 Condense drain r Return connection chamber door 5 Flue collector 9 Data badge v Safety valve tapping 3 Burner mounting plate 6 Flue connection 10 Control panel E Drain Model SupeRAC AR 80 90 130 170 200 250 300 350 400 450 500 600 700 800 900 mm 790 790 790
16. n gas supply and press reset button on burner ensure burner restarts normally Set controls to normal operational settings Instruct user on the operation of the boiler and its controls and safety functions User Instructions Following the successful installation and commissioning procedures the user must be made aware of the lighting and operating instructions including a practical demonstration This installation guide plus the burner instructions must handed over for safe keeping and future reference Operation Controls The control panel includes two control thermostats which allows for the operation of high low firing 2 stage burners The left hand thermostat is for the control of the first stage low fire and should be set to the actual final wanted flow temperature the right hand thermostat is for the control of the second stage high fireO and should be nominally set around 3 5 degrees lower than the first stage thermostat to allow the burner to reduce to it s low fire setting as the final setpoint water temperature is approached Care should be taken to ensure that the controls are set to avoid that the water temperature within the system remains at a level where the return water temperature is less than 60 C for gas firing or 50 C for oil firing MHS Boilers 11 09 2012 SupeRAC AR For Models 80 to 3600 If a modulating burner is being used then the 4 core burner connection lead T6 T8 T7 should be ig
17. nored and not utilised The thermostat sensing bulb for the 2 stage control thermostat should not be located in the thermostat pocket and the temperature sensor supplied with the modulating burner temperature controls can be substituted into the thermostat pocket in place of the 2 stage thermostat sensing bulb MHS Boilers 11 09 2012 Notes SupeRAC AR For Models 80 to 3600 MHS Boilers 11 09 2012
18. stance with a minimum negative draught at the boiler flue connection in the order of 10 30Pa If the draught generated in the flue is likely to exceed 30Pa then a suitable draught stabiliser should be installed locally to the flue connection at the boiler The flue installation should comply with the requirements of the Clean Air Act 1956 BS 6644 BS5440 and IGE UP 10 as applicable 12 MHS Boilers 11 09 2012 SupeRAC AR For Models 80 to 3600 System water Care must be taken to ensure that system pipe work is cleansed and flushed prior to filling the boiler The system water must be treated with a good quality corrosion inhibitor and the water condition must be maintained to ensure that the following values are observed pH 8 3 9 5 Hardness lt 100mg CaCO3 litre Chlorides lt 50mg litre Oxygen lt 0 1mg litre Phosphates lt 30 mg litre It is strongly recommended to install coarse strainers to protect the boiler pumps valves etc from the effects of solid debris or particles within the system 13 MHS Boilers 11 09 2012 SupeRAC AR For Models 80 to 3600 Control panel schematic TL T2 T6 T8 T7 On Off Hi Lo 2 Stage Fig Supply 230V 1ph 50Hz To Burner IG Isolator TSAH Limit thermostat TR1 1 Stage thermostat TR2 2 Stage thermostat TA External enable contacts remove link if connected F Fuse 4A 14 MHS Boilers 11 09 2012 SupeRAC AR For Models 80 to 3600 Preliminary checks b
19. xtremely important that any space around the burner blast tube is packed with the ceramic fibre material supplied with the boiler Ceramic fibre material packed in to seal any gaps between the burner blast tube and the insulation pad on the combustion chamber door Prevention of Condensation Boiler It is most important to ensure that the return water temperature entering the boiler is maintained above the dew point temperature of the flue gases An acceptable method of creating of this facility is to install a link pipe between the main flow and return pipes serving the boiler with a pump and a non return valve included as shown above The pump needs only to be of a very low head and the flow rate should be in the order of 25 30 of the mass flow of the main boiler pump The anti condensation pump should be controlled by a thermostat mounted onto the return pipe adjacent to the return pipe connection of the boiler and the temperature setting should be nominally 60 C for gas firing and 50 C for oil firing 10 MHS Boilers 11 09 2012 SupeRAC AR For Models 80 to 3600 Fuel supply Gas supply pipework must be in accordance with BS 6891 or IGE UP 2 The gas installation must be soundness tested to and purged in accordance with BS 6891 or IGE UP 1 8 IGE UP 1A Gas connections to the burner shall not be smaller than the connection size on the burner If a gas pressure booster is required refer to the manual supplied with the burner
20. ype B boilers of nominal heat input exceeding 300 kW but not exceeding 1000 kW EN 15502 1 Gas fired central heating boilers Part 1 General requirements and tests EN 55014 1 Electromagnetic compatibility Requirements for household appliances electric tools and similar apparatus Part 1 Emission EN 55014 2 Electromagnetic compatibility Requirements for household appliances electric tools and similar apparatus Part 2 Immunity Product family standard EN 61000 3 2 Electromagnetic compatibility EMC Part 3 2 Limits Limits for harmonic current emissions equipment input current 16 A per phase EN 61000 3 3 Electromagnetic compatibility EMC Part 3 3 Limitation of voltage changes voltage fluctuations and flicker in public low voltage supply systems for equipment with rated current 16 A per phase and not subject to conditional connection EN 60335 1 Household and similar electrical appliances Safety Part 1 General re quirements EN 50165 Household and similar electrical appliances Safety Part 2 102 Particular requirements for gas oil and solid fuel burning appliances having electrical connections 5 MHS Boilers 11 09 2012 SupeRAC AR For Models 80 to 3600 The following Codes of Practice are also applicable BS 6644 2011 Specification for gas fired hot water boilers of rated inputs between 70kW net and 1 8MW net 2 and 3 family gases BS 6880 1988 Code of Practice for low temperature hot w
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