Working towards a cleaner future
Contents
1. a 0 100 200 400 600 800 1000 4400 1200 4300 1400 4500 1600 1700 1800 6000 1 1 1 1 1 j 1 1 1 14000 13000 en 12000 11000 10000 4000 9000 8000 1 55 3000 7000 6000 2000 5000 4000 3000 1000 2000 1000 0 0 0 1000 2000 3000 4000 5000 6000 c 2 D000348 D Minimum relieving capacity Example Maximum gross boiler output Maximum boiler nominal output is 200 kW Unit kW T a Minimum safety valve flowrate must be 700 kg h b Ib h c MBtu h d Kg h 4 5 5 Hydraulic connection of the water circuit for domestic use ve See Domestic hot water calorifier instructions 09 06 2011 300025088 001 B NXR4i 4 Installation 4 6 Chimney connection The high performance features of modern boilers and their use in specific conditions as a result of the advance in burner technology e g first stage or low modulation range operation lead to very low flue gas temperatures lt 160 C 4 6 1 Flue size For this reason Use flue gas pipes designed to enable the flow of condensates which may result from such operating modes in order to prevent damage to the chimney Install a draining tee at the bottom of the chimney The use of a draught moderator is recommended as well Refer to applicable regulations while determi2. 7 21 Safety INSTUCHONS EET a A an 7 2 1 1 Fire hazard PUE 7 2 12 Risk 7 2 13 Risk of DUME 5 srr ertene do eer SO Re PORTA UC PUE DOG PCR IIT PUE DER GREC AGE POUR d 7 2 14 RISK OF damage eR CPC LI eine 7 22 Recommendations aed studs eRe 8 3 Technical description oda cem o e ex rax meer 9 34 General description erden hen 9 2 chhicalSDecifiCallOliS c sar uaa ma ee 9 installation ERR ERR RE PAX GP pk er 10 4 1 Regulations governing installation 2222222222222 2 2 2 2 10 4 2 I A 10 4 3 Choice of the location iiie cec sse there m RR RR RR COUR RE AUR GR EROR Ro ah 10 4 3 1 Main dimensions n 10 4 3 2 P sitionof the Mean RD 1 4 3 3 Ventilation a aa a ee ee ee i e eh 12 44 Example 4 13 4 5 H
3. 105 8229 8834 Complete front casing support 106 8229 0537 Lower front crosspiece 107 8229 8807 Upper casing support left 108 8229 8808 Upper casing support right 109 8229 8010 Lower casing support 110 200007889 Side panel left or right width 480 mm 111 200007422 Complete front side panel left 112 200007896 Complete side panel left width 770 mm 112 200007894 Complete side panel left width 610 mm 112 200007898 Complete side panel left width 930 mm 113 200007421 Complete front side panel right 114 200007893 Complete side panel right width 610 mm 114 200007895 Complete side panel right width 770 mm 114 200007897 Complete side panel right width 930 mm 115 8229 8835 Complete upper rear panel left 116 8229 8836 Complete upper rear panel right 117 8229 8012 Lower back panel 118 8229 8837 Complete upper cross bar 119 8229 8809 Complete front cover 120 200019564 Painted control panel base 121 8229 0515 Complete intermediate cover 122 8229 0518 Complete rear cover width 170 mm 122 8229 0511 Complete rear cover width 330 mm 122 8229 0514 Complete rear cover width 490 mm 123 8229 8819 Complete cable way left NXR4 8 123 8229 8820 Complete cable way left NXR4 9 123 8229 8821 Complete cable way left NXR4 10 123 8229 8822 Complete cable way left NXR4 11 NXR4i 09 06 2011 300025088 001 B Warranty Warranty You have just purchased one of our applianc
4. NXR4i 09 06 2011 300025088 001 B 1 Introduction 1 Introduction 1 1 Symbols and abbreviations N Caution danger Risk of injury and damage to equipment Attention must be paid to the warnings on safety of persons and equipment Specific information Information must be kept in mind to maintain comfort 1 2 General 4 ve Reference Refer to another manual or other pages in this instruction manual DHW Domestic hot water Congratulations on your choice of a high quality product We strongly advise you to read the following instructions in order to guarantee the optimal operation of your appliance We are sure that it will be entirely to your satisfaction and will meet with all of your expectations 1 2 1 Manufacturer s liability gt Keep these instructions in a safe place close to the appliance Inthe interest of customers Potterton are continuously endeavouring to make improvements in product quality All the specifications stated in this document are therefore subject to change without notice gt Theliability of Potterton as the manufacturer may not be invoked in the following cases Failure to abide by the instructions on using the appliance Faulty or insufficient maintenance of the appliance Failure to abide by the instructions on installing the appliance 1 2 2 Installer s liability The installer is responsible for the installation and inital start up of the appliance The
5. A exterior 250 250 250 300 300 300 300 s DO 2 1 2 2 1 2 2 4 2 3 3 3 3 oc Intact or pre drilled plate available in spare parts list D 235 235 235 254 254 254 254 E 1427 1427 1427 1447 1447 1447 1447 J 1800 1950 2120 2305 2465 2625 2785 L 1505 1665 1825 1985 2145 2305 2465 S 1183 1343 1503 1663 1823 1983 2143 10 NXR4i 09 06 2011 300025088 001 B 4 Installation 43 2 Position of the boiler For the assembly and because of their design NXR4i boilers require dimensions in mm correspond to the minimum recommended no special base Their closed furnace system means that the floor dimensions needed to ensure adequate accessibility around the need not have refractory properties All you have to ensure is thatthe boiler floor can support the weight of the boiler when itis fitted for operation If the boiler location is not determined precisely leave enough space around the boiler to facilitate monitoring and maintenance operations 8229N002 1 Top view 2 Bumer door NXR4i 8 NXR4i 9 NXR4i 10 NXR4i 11 NXR4i 12 NXR4i 13 NXR4i 14 A mm 1505 1665 1825 1985 2145 2305 2465 B mm 130 40 120 40 120 40 120 C mm 1500 2000 2000 2000 2500 2500 2500 AN Pay attention to the overall volume of the burner when the door is open To install several boilers in cascade these dimensions should be adapted accor
6. in existing installations gt Remove sludge from the installation See Sludge removal gt Flush the installation gt Clean the installation with a universal cleaner to eliminate debris from the appliance copper flaxen thread flux gt Thoroughly flush the installation until the water runs clear and shows no impurities A tapped Rp 2 1 2 hole with a plug has been provided on the bottom of the front of the boiler Fit a 1 4 turn valve not supplied on the opening to remove the sludge Sludge removal leads to the draining of large quantities of water so remember to refill the system after the operation 4 5 3 Hydraulic connection of the heating circuit After this operation go ahead and fill the installation See Filling the system never replace a boiler in an existing system without carefully rinsing the system first Install a sludge decanting pot on the return pipe very close to the boiler m Water flow in the boiler The water flow in the boiler when the burner is operating must correspond with the following formulae Nominal water flow Qn 0 86 20 Minimum flow Qmin 7 0 86 Pn 45 this flow also corresponds with the minimum recycle flow in the boiler Maximum water flow Qmax 0 86 5 Qn flow in m h Pn Nominal output full boiler output in KW Connect the flow controller to the terminal blocks UV in the control panel KSF CE For the control panel KSF refer t
7. iron body Various manufacturers offer products in the form of a concentrated liquid or aerosol The aerosols are packaged in 0 5 to 1 spray cans for treating domestic boilers Refer to the instructions supplied with the product The liquid products are available in 1 to 50 containers These concentrated liquids are diluted before application with a spray Sprays exist in various forms suitable for their intended use Low capacity 2 or 3 I spray with built in reservoir for small boilers and moderate frequency Manual pressurisation of the reservoir 5 spray with separate reservoir nozzle and connecting tube The nozzles enable easy application at the back of the combustion chamber Manual pressurisation of the reservoir Motor assisted pressurisation spray with reservoir nozzle and connecting tube These sprays are intended for intensive use 8800N065 N 8800N066 NJ 4 8800 064 8800 063 NXR4i 09 06 2011 300025088 001 B m Operational mode The operating mode mentioned corresponds to standard user situations Refer to the manufacturer s instructions for specific advice on the product used m Application Depending on the product the boiler must be cold or heated Refer to the instructions supplied with the product Direct application to the heating surfaces with aerosol sprays The concentrates are diluted in the proportions 1 5 to 1 20 depending on the product and the condition
8. manufacture Serial no of the appliance 889080 7 Checking and maintenance 7 3 Maintenance ANThe boiler will only operate efficiently if the exchange surfaces are kept clean The boiler should be cleaned as soon as required and as the chimney at least once a year or more depending upon applicable regulations and specific needs 7 3 1 Cleaning the flue gas circuit The operations described below shall only be performed with the boiler and power supply off L000061 C Remove the upper front panel Take off the lower panels Open the sweeping doors upper doors by unscrewing the 3nuts using a 19 mm spanner Remove the baffle plates from the upper flue ways 7 3 2 Cleaning the combustion chamber C003446 A Carefully sweep the flue ways with the brush supplied for that purpose Brush the baffle plates If possible use a vacuum cleaner Replace the baffle plates Close the doors C003444 A 20 Unscrew the 4 closing nuts and open the furnace door Brush out the inside of the furnace Use a vacuum cleaner to remove any soot which has accumulated in the combustion chamber Close the door and replace the front panel 09 06 2011 300025088 001 B 7 Checking and maintenance 7 33 Positioning of the baffle plates Put the baffle plates back in place and hook them into each other Close the sweeping d
9. 0 Flame inspection window gasket 6 8005 0200 Nipple 29 8229 8905 Complete sweeping door right 6 1 9430 5027 Nipple greasing product 30 8229 8906 Complete sweeping door left 7 8229 8919 Assembly rod 425 mm 31 9755 0256 Insulation sweeping door 7 8229 8920 Assembly rod 620 mm 32 9755 0257 Inner protection sweeping door 7 8229 8921 Assembly rod 784 mm 33 8229 0202 Hinge for sweeping door 8 9754 0120 Spring 34 9756 0214 Hinge pin for sweeping door 9 9752 5232 Mounting square 35 8229 8907 Complete flue gas box 10 9508 6032 Glass fibre cord 10 mm metre 36 8229 8908 Complete right hand cleaning trap 10 1 9428 5095 Tube of silicon mastic 37 8229 8909 Complete left hand cleaning trap 11 8229 8923 Water flow pipe gasket 7 to 10 sections 38 8229 8916 Flue gas nozzle 0 250 8 to 10 sections 11 8229 8918 Water flow pipe gasket 11 to 14 sections 38 8229 8917 Flue gas nozzle 0 250 11 to 14 sections 12 8104 8965 Return collector seal 8 to 10 sections 40 8229 0010 Upper baffle plate width 190 mm 12 1 8229 8922 Return collector seal 11 to 14 sections 40 1 8229 0022 Additional upper baffle plate width 190 mm 13 9501 4135 Gasket 162x120x4 41 8229 0011 Upper baffle plate width 240 mm 14 8202 0028 2 1 2 plug with 1 2 opening 41 1 8229 0023 Additional upper baffle plate width 240 mm 15 8013 0028 Solid plug 2 1 2 42 8229 0012 Lower baffle plate 16 8500 0027 Sensor tube 42 1 8229 0024 Additional lower baffle pl
10. 0065 Interpart Brooks House Coventry Road WARWICK CV34 ALL 08706 000454 08706 000545 8 Spare parts NXR4i Casing 126 127 128 100 89900001 Insulating material for body VLLON6ZZE NXR4i 09 06 2011 300025088 001 B 8 Spare parts NXR4i Control panels Refer to the Spare Parts list in the panel instructions KSF ISR control panel KSF CE control panel 26 NXR4i 09 06 2011 300025088 001 B 8 Spare parts NXR4i Markers Code no Description Markers Code no Description Boiler body Accessories 21 9755 0259 Furnace door guard Base frame 22 9755 0260 Furnace door insulation 1 300010442 Complete frame 8 sections 23 8229 0020 Added hinge 1 300010443 Complete frame 9 10 sections 24 9756 0213 Hinge pin for combustion chamber door 1 300010444 Complete frame 11 12 sections 25 8229 0205 Hinge for combustion chamber door 1 300010445 Complete frame 13 14 sections 25 1 8229 8944 Hinge unit 2 8229 8940 Complete rear section 26 8229 0025 Ramp 3 8229 0029 Normal intermediate section 27 9757 0027 Inspection flange 4 8229 0030 Special intermediate section 27 1 8015 7700 Flame inspection window gaskets 5 8229 8941 Complete front section 28 9501 008
11. August 201 1 NXHR4iI Installation and Service Manual ic Working towards POITESTON co M M E R C I AL Cleaner future heating specialists Declaration of conformity CE Declaration of conformity CE The appliance complies with the standard model described in declaration of compliance C It is manufactured and distributed pursuant to the requirements of european directives The original of the declaration of compliance is available from the manufacturer NXR4i 09 06 2011 300025088 001 B Contents Contents 5 1 1 Symbols and abbreviations 4 2 2 4 222 5 1 2 General ns NE e echa Ota oa e d t nina do Ra cet al Ab RR RR D e 5 1 2 1 Manufacturer s 2 2 5 1 22 Installer s liability kc er nte Ron eta a a eti UR e ee 5 1 2 3 etes hehe utu hae mrt tM 5 1 3 Homologations 6 25 cosciente kt em e m bod Rote Re d A b d d od n 6 1 3 1 Certifications PP 6 1 3 2 Directive 97 23 M DR RH 6 2 Safety instructions
12. and therefore cannot be CE marked to certify compliance with the directive 97 23 EC The boilers and hot water tanks are designed and manufactured in accordance with the sound engineering practice as requested in article 3 3 of the directive 97 23 EC it is certified by compliance with the directives 90 396 EC 92 42 EC 2006 95 EC and 2004 108 EC NXR4i 09 06 2011 300025088 001 B 2 Safety instructions and recommendations 2 Safety instructions and recommendations 2 1 Safety instructions For a proper operating of the boiler follow carefully the N Before any work switch off the mains supply to the instructions appliance Only qualified professionals are authorised to work on the Z N Keep to the polarity shown on the terminals phase L appliance and the installation neutral N and earth Incorrect use unauthorised modifications to the Z N Keep children away from the boiler installation or the equipment itself invalidate any right to claim 2 4 1 Fire hazard It is forbidden to store inflammable products and materials 1 Shut off the gas supply in the boiler room or close to the boiler even temporarily 2 Open the windows 3 Extinguish all flames 4 Evacuate the premises 5 Contact a qualified professional 6 Inform the gas supplier At you smell gas do not use a naked flame do not smoke do not operate electrical contacts or switches doorbell lights motor lift etc 2 1 2 Ri
13. ate 17 9758 1286 Spring for sensor tube 18 8229 8911 Complete combustion chamber door no opening 43 Flow switch Export 48 8229 8943 Me a chamber door with 43 8802 4711 Flow controller NXR4 8 43 8802 4713 Flow controller NXR4 9 43 8802 4715 Flow controller NXR4 10 19 8229 0532 Plate for combustion chamber door no opening 43 8802 4726 Flow controller NXR4 11 49 8229 0546 ed for combustion chamber door with opening 43 8802 4728 Flow controller NXR4 12 19 8339 0508 Plate for combustion chamber door with opening 9 83 8802 4 29 Flow controller NXR4 13 14 175 44 8229 8996 Screws and accessories bag 49 8229 0531 bed for combustion chamber door with opening 0 45 8229 8937 Variable screws and accessories bag 46 8229 5500 Body screws packet 49 8229 0533 2 for combustion chamber door with opening eee bns for combustion chamber door with opening 2 iic ical body 47 8229 4010 Lower insulation boiler body 8 sections 19 8229 0534 for combustion chamber door with opening 47 8229 4016 Lower insulation boiler body 9 and 10 sections 47 8229 4034 Lower insulation boiler body 11 and 12 sections 49 8229 0548 Plate for combustion chamber door with opening on request 47 8229 4036 Lower insulation boiler body 13 and 14 sections 20 9755 0258 Height converter insulation 48 8229 4004 Front boiler body insulation width 500 mm 09 06 2011 300025088 001 NXR4i 8 S
14. dingly 09 06 2011 300025088 001 B NXR4i 4 Installation 4 3 3 Ventilation To allow the input of combustive air sufficient ventilation must be provided in the boiler room for which the cross section and emplacement must satisfy regulations in force in the country in which the boiler is installed Position the air inlets in relation to the high ventilation vents in order that the air is refreshed throughout the boiler room not obstruct the air inlets in the room even partially An order to avoid damage to the boiler it is necessary to prevent the contamination of combustion air by chlorine and or fluoride compounds which particularly corrosive These compounds are present for example in aerosol sprays paints solvents cleaning products washing products detergents glues snow clearing salts etc Therefore Do not pull in air evacuated from premises using such products hairdressing salons dry cleaners industrial premises solvents premises containing refrigeration systems risk of refrigerant leakage etc Do not stock such products close to the boilers If the boiler and or peripheral equipment are corroded by such chloride or fluoride compounds the contractual guarantee cannot be applied NXR4i 09 06 2011 300025088 001 B 4 Installation 44 Example of an installation The example of an installation shown below does not cover every possible configuration Its so
15. equired if the heating is stopped when there is a risk of freezing 18 7 Checking and maintenance 19 System malntenarice TTET TT 19 7 1 1 Water level menea RM tem 19 a 19 7 2 Data plate extus 19 7 3 Maintenance Ced bete Reid dead FRAU RR pe eti 20 09 06 2011 300025088 001 B NXR4i Contents 7 3 1 Cleaning the flue gas circuit 2 22 ecciesie m e me en nennen 20 7 3 2 Cleaning the combustion 2 222 222 2 2 2 20 7 3 3 Positioning of the baffle 24 2 2 2 21 7 3 4 Cleaning the flue gas 224 2 2 2 2 22 22 7 3 5 Chemical Sweeping i uen eek e tek m he hide the Rb eb Rb dn ERR Rn RUE e E 22 74 Cleaning the casing material 2 2 24 4 2 2 24 24 2 2 23 1 5 Maintenance ofthe bee e E Y d EO RE RAE m TR be REC a 23 8 Spareparis NARA usn RR RAT ARA ORB FERRE BR Ra PRU MER S RR nd 24
16. es and we thank you for the trust you have placed in our products Please note that your appliance will provide good service for a longer period of time if it is regularly checked and maintained Your fitter and our customer support network are at your disposal at all times m Warranty terms Starting from the purchase date shown on the original fitter s invoice your appliance has a contractual guarantee against any manufacturing defect The length of the guarantee is mentioned in the price catalogue The manufacturer is not liable for any improper use of the appliance or failure to maintain or install the unit correctly the user shall take care to ensure that the system is installed by a qualified engineer In particular the manufacturer shall not be held responsible for any damage loss or injury caused by installations which do not comply with the following applicable local laws and regulations specific requirements relating to the installation such as national and or local regulations the manufacturer s instructions in particular those relating to the regular maintenance of the unit the rules of the profession The warranty is limited to the exchange or repair of such parts as have been recognised to be faulty by our technical department and does not cover labour travel and carriage costs The warranty shall not apply to the replacement or repair of parts damaged by normal wear and tear negligence repairs by unqualified par
17. installer must respect the following instructions gt Read and follow the instructions given in the manuals provided with the appliance Carry out installation in compliance with the prevailing legislation and standards gt Perform the initial start up and carry out any checks necessary 1 2 3 User s liability When handing over the installation to the user the installer will draw the user s particular attention to the following points The safety of the installation The functioning of the installation and the boiler Periodic maintenance to be done To ensure the optimum operation of your appliance we strongly recommend that you abide by the following instructions gt Read and follow the instructions given in the manuals provided with the appliance gt Call on qualified professionals to Carry out installation in compliance with the prevailing legislation and standards Perform the initial start up Carry out work on the appliance and the installation Have the required checks and services done gt Get your fitter to explain your installation to you 09 06 2011 300025088 001 B NXR4i 1 Introduction 1 3 Homologations 1 3 1 Certifications CE identification no 1312 AQ 952 1 3 2 Directive 97 23 EC Gas and oil boilers with a maximum operating temperature of 110 C and hot water tanks with a maximum operating pressure of 10 bar pertain to article 3 3 of the directive
18. le aim is to draw your attention to the basic rules to be respected NXR4i boiler with domestic hot water production using an independent tank 7 30 1000047 17 Drain cock 1 Heating flow 18 Heating circuit filling with disconnector depending on prevailing 2 Heating return regulations 3 3 bar safety valve Pressure gauge 19 Water treatment 5 Flow switch 20 Water meter 6 Air separator 26 DHW load pump 7 Automatic air vent 27 Non return valve 9 Isolating valve 28 Domestic cold water inlet 10 3 mixing valve 29 Pressure reducer if mains pressure 5 5 bar 11 Boiler pump 30 Sealed safety unit calibrated to 7 bar with indicator type discharge 12 Sludge decanting pot particularly recommended on older 31 Independent domestic hot water tanks installations 32 Domestic hot water loop pump optional 13 Flush valve 56 Domestic hot water circulation loop return 14 Water low safety pressure sensitive switch 57 Domestic hot water outlet 15 Shunt pump 16 Expansion vessel 09 06 2011 300025088 001 B NXR4i 4 Installation 4 5 Hydraulic connections 45 1 Flushing the system m Installing the boiler in new installations installations less than 6 months old gt Clean the installation with a universal cleaner to eliminate debris from the appliance copper flaxen thread flux gt Thoroughly flush the installation until the water runs clear and shows no impurities 45 2 Sludge removal m Installing the boiler
19. ler replacement Oil gas conversions Water treatment and descaling Packaged units All descriptions and illustrations contained within this leaflet have been carefully prepared but we reserve the right to make changes and improvements in our products which may affect the accuracy of the information in this leaflet Baxi Commercial Division Sales Wood Lane Erdington Birmingham B24 9QP Technical 0845 070 1056 0845 070 1057 POTITESTON C M ER C I AL V WV INVESTORS 2 IN PEOPLE mt Email potterton commercial baxicommercialdivision com www pottertoncommercial co uk heating specialists
20. ning the size of the flue Please note that NXR4i boilers have pressurised and tight furnaces and that the pressure at the nozzle must not exceed 0 mbar unless special sealing precautions have been taken for instance in order to connect a static condenser regenerator 4 6 2 Connection to the flue gas pipe order for the boiler to operate correctly it is imperative to respect the draught at the nozzle 0 The connection shall be removable and offer minimum load losses i e it must be as short as possible with no sudden change in section Its diameter shall always be at least equal to that of the boiler outlet i e A 250 mm for 8 to 10 sections A 0 300 mm for 11 to 14 sections Fit a measuring point 2 10 mm hole on the flue in order to adjust the burner combustion check NXR4i 09 06 2011 300025088 001 B 4 Installation 47 Fuel oil or gas connections ND Refer to the instructions supplied with the burner The burner head deflector must be flush with the insulation of the burner door 8229N007 B C Furnace door insulation D E Pressure gauge measurement socket OA 135 175 190 240 250 290 OB 170 200 220 270 325 330 QD 10 10 10 10 10 10 E 10 10 10 10 10 10 OM 8 8 10 10 14 12 1 Max attachment diameter B 290 mm 9B 330 mm with 4 fastenings at 15 or 45 4 8 Electrical connection
21. o the instruction manual of the panel m Operation in cascade After stopping the burner Timeout required before the order to close a 2 way valve 3 min Switch a possible shunt pump located between the boiler and a butterfly valve off via the end of run contact of the butterfly valve m Operation with 2 stage burner The water temperature in the boiler is maintained at 50 C or more The first stage must be set to a minimum of 30 of the nominal stage Operation at modulated low temperature minimum outlet temperature 40 C The first stage must be set to a minimum of 50 of the nominal stage NXR4i Wig Refer to the installation and service manual for the KSF CE control panel m Operation with modulating burner The water temperature in the boiler is maintained at 50 C or more The burner can modulate down to 30 of the nominal stage Operation at modulated low temperature minimum outlet temperature 40 C The burner can modulate down to 50 of the nominal stage Refer to the installation and service manual for the KSF ISR control panel 09 06 2011 300025088 001 B 4 Installation 4 5 4 Safety valve The safety valve must be connected to the boiler outlet and no other valve or flap must be interposed between it and the boiler m Minimum safety valve flowrate as a function of maximum boiler nominal output
22. of the NXR4i range pressurised hot water boilers Heating body in cast iron designed for connecting to a flue pipe which require a separate KSF ISR or KSF CE control panel automatic fuel oil or gas burner NXR4i boilers have the following Production of domestic hot water be ensured by a separate hot characteristics water calorifier 3 2 Technical specifications Conditions of use Test conditions Maximum operating temperature 100 C Fuel oil 1396 Maximum operating pressure 6 bar CO Natural gas 9 5 Thermostat adjustable from 30 to 90 C Ambient temperature 20 C Safety thermostat 110 C Boiler NXR4i 8 NXR4i 9 NXR4i 10 NXR4i 11 NXR4i 12 NXR4i 13 NXRdi 14 Useful output kW 300 357 357 419 419 481 481 543 543 605 605 667 667 729 Power input kW 329 394 392 462 460 530 526 597 595 666 659 731 727 798 Number of sections 8 9 10 11 12 13 14 Water content 366 409 452 495 538 581 624 Water resistance 1 AT 10K mbar 25 42 63 83 106 135 169 B AT 15K mbar 11 18 28 37 47 60 75 B A T 20K mbar 6 10 16 21 26 34 42 B Pressure the furnace for nozzle pressure mbar 0 92 1 30 1 59 2 05 2 04 2 15 3 06 9 1 B Flue gas temperature Ambient K lt 190 lt 190 lt 190 lt 190 lt 190 lt 190 lt 190 temperature 1 8 Mass flue gas flow Fuel oil Kg h 600 710 810 910 1020 1120 1220 rate 1 2 Gas 630 740 850 960 1070 1170 1280 Comb
23. of the boiler Application with the spray is done in the upper part of the boiler and on the walls of the combustion chamber Surfaces are dampened but not washed It is not necesaary to use the spray to get between the heating surfaces A volume of one litre of solution is generally used for 1 m of heating surface domestic boiler i e 0 05 to 0 21 of concentrate 7 4 Cleaning the casing material 7 Checking and maintenance m Ignition The burner is ignited after allowing the product time to penetrate for 2 to 5 min Refer to the instructions supplied with the product C003445 A m Cleaning Remove the baffle plates Light sweeping will remove the pulverent residues remaining after combustion The remaining pulverent residues are easy to remove by sweeping or vacuum cleaning For certain products brief application after cleaning has a preventive effect limiting deposits on the heating surfaces Replace the baffle plates Close the door of the combustion chamber Service the burner Replace the front panel Use a soapy solution and a sponge only Rinse with clean water and dry with chamois leather or a soft cloth 7 5 Maintenance of the burner WD Refer to the instructions supplied with the burner 09 06 2011 300025088 001 B NXR4i 8 Spare parts NXRdi i To order a spare part quote the reference number next to the part required 300025088 002 A Boiler body Miscellaneous L00
24. oors before engaging them fully in the flue way 8229 0022 gt lt N Follow the order of assembly shown in the diagram The 8 figure part number of the baffle plate is cast in the metal Boiler NXR4i 8 NXR4i 9 NXR4i 10 NXR4i 11 NXR4i 12 NXR4i 13 NXR4i 14 Upper flue ways First 2 then 2 x 8229 0010 First then P aD 5 then 3x 8229 0010 Central flue ways First 2 then 2 x 8229 0011 k 2 then Au 1205 then 3x 8229 0011 nn then 2x8299012 2 a then 2x8229 0012 2 x 8229 0012 09 06 2011 300025088 001 B NXR4i 7 Checking and maintenance 7 3 4 Cleaning the flue gas box 8229 034 7 3 5 Chemical sweeping To do so Open the left and right cleaning hatches on the flue gas box 2 nuts H 12 flat washers with a 19 mm spanner and remove any soot which has accumulated using a vacuum cleaner Replace the cleaning hatches m General principle Boilers are traidtionally swept mechanically There are now chemical sweeping methods which facilitate this maintenance work A chemical reagent is applied to the boiler s heating surfaces After application the reaction is completed by igniting the burner The initial deposits are neutralised and pyrolised The remaining pulverent residues are easy to remove by sweeping or vacuum cleaning m The products The product must be suitable for boilers with a cast
25. pare parts NXR4i Markers Code no Description Markers Code no Description 49 8229 4015 Boiler body insulation width 520 mm 123 8229 8823 Complete cable way left NXR4 12 49 8229 4018 Insulating material for body Length 600 mm 123 8229 8824 Complete cable way left NXR4 13 49 8229 4009 Insulating material for body Length 800 mm 123 8229 8825 Complete cable way left NXR4 14 49 8229 4012 Insulating material for body Length 900 mm 124 8229 8827 Complete cable way right NXR4 8 50 8229 4005 Rear insulation 124 8229 8828 Complete cable way right NXR4 9 124 8229 8829 Complete cable way right NXR4 10 Miscellaneous 124 8229 8830 Complete cable way right NXR4 11 60 9750 5025 Brush 124 8229 8831 Complete cable way right NXR4 12 61 9750 5060 1300 mm brush rod 124 8229 8832 Complete cable way right NXR4 13 62 9750 5048 Extension for brush rod 650 mm 124 8229 8833 Complete cable way right NXR4 14 125 8229 5501 Additional lower rear panel Casing 126 8229 8933 Screw bag common parts 100 200019288 Complete upper front panel 127 8229 8934 Screw bag variable parts CS11 101 8229 1001 Complete lower front panel right 128 8229 8935 Screw bag variable parts CS13 102 8229 1003 Complete lower front panel left 103 8229 1004 Panel for furnace door 104 8229 1005 Sludge removal
26. s XD Refer to the connection instructions supplied with the control panel 49 Filling the system Filling shall be performed with a low flow rate from a low point in the N VERY IMPORTANT Instructions for starting up the boiler boiler room in order to ensure that all the air in the boiler is bled from for the first time after the system is fully or partly drained the high point of the system If all the air is not bled naturally to an expansion vessel which opens out onto the air the system must include Be barare Mingi gnuni manual bleeder valves in addition to automatic bleeder pompie valves with the capability to bleed the system by themselves when it is operating the manual bleeder valves not add cold water suddenly into the boiler when it is are used to bleed all the high points of the system and to hot make sure that the filled system is free of air before the burner is turned on 09 06 2011 300025088 001 B NXR4i 5 Commissioning 5 Commissioning 4 Control panel instructions Burner instructions Domestic hot water calorifier instructions 6 Switching off the boiler gt Setthe On Off switch to gt Cutthe gas supply to the boiler if present ND See Control panel instructions 6 1 Precautions required in the case of long boiler stops one or more years The boiler and the chimney must be swept carefully We advi
27. se removing the pipe which connects the boiler to the Close allthe doors ofthe boiler to prevent air from circulating inside chimney and to close off the nozzle with a cover the boiler 6 2 Precautions required if the heating is stopped when there is a risk of freezing We recommend the use of a correctly dosed antifreeze agent to prevent to the heating circuit from freezing If this cannot be done drain the system completely 18 NXR4i 09 06 2011 300025088 001 B 7 Checking and maintenance 7 Checking and maintenance 74 System maintenance 7 1 1 Water level Regularly check the level of water in the system and top up if required taking care that cold water is not added suddenly into the boiler when it is hot The use of an automatic filling is strongly discouraged 7 1 2 Draining This operation should be required only a few times in each heating season with very low quantities of water otherwise look for the leak and repair it We advise you against draining the system unless it is absolutely necessary 7 2 Data plate For example Several months absence with the risk of ice in the building The rating plate fixed on the side of the boiler during installation is used to identify the boiler correctly and also provides the main specifications of the boiler Mgr 5 09 06 2011 300025088 001 L000060 B NXR4i Boiler type Manufacturing date Year of manufacture Week of
28. sk of intoxication not obstruct the air inlets in the room even partially 1 Switch the appliance off ANE ou smell flue gases IG windows y 9 3 Evacuate the premises 4 Contact a qualified professional 2 4 3 Risk of being burnt N Depending on the settings of the appliance The temperature of the flue gas conduits may exceed 60 C The temperature of the radiators may reach 95 C The temperature of the domestic hot water may reach 65 C 21 4 Risk of damage not stock chloride or fluoride compounds close to the appliance AN Install the appliance in frost free premises not neglect to service the appliance Contact a qualified professional or take out a maintenance contract for the annual servicing of the appliance 09 06 2011 300025088 001 B NXR4i 2 Safety instructions and recommendations 2 2 Recommendations gt Check regularly that the installation contains water and is pressurised gt Keep the appliance accessible at all times gt X Avoid draining the installation gt _ The appliance should be on Summer or Antrifreeze mode rather than switched off to guarantee the following functions Anti blocking of pumps Frost protection Protection against corrosion on domestic hot water tanks fitted with a titanium anode NXR4i 09 06 2011 300025088 001 B 3 Technical description 3 Technical description 3 1 General description The boilers
29. ties faulty or insufficient monitoring and maintenance faulty power supply or the use of unsuitable fuel Sub assemblies such as motors pumps electric valves etc are guaranteed only if they have never been dismantled 09 06 2011 300025088 001 B NXR4i 2 Warranty 20 NXR4i 09 06 2011 300025088 001 B Warranty 09 06 2011 300025088 001 B NXR4i Publication Date AUG 2011 Commercial sales technical amp service enquiries Tel 0845 070 1055 Fax 0845 070 1059 Sales hotline 0845 070 1056 Technical helpline 0845 070 1057 Service hotline 0845 070 1058 e mail potterton commercial baxigroup com web www pottertoncommercial co uk Spares Potterton Commercial spares are available nationwide through the interpart network of approved stockists Alternatively please contact Interpart Brooks House Coventry Road Warwick CV34 4LL Tel 0844 871 1540 PART OF BDR THERMEA Applications amp Installations Our experienced technical support team are available to offer advice on any aspect of heating system design and boiler installation Please contact 0845 070 1057 Commercial service offices Our service organisation covers the whole of the UK to look after your needs for all Potterton Commercial products Our service office offers a wide range of specialised services including Burner commissioning for all fuels Boiler service contracts Breakdown and repair services Burner and boi
30. ustion chamber Diameter mm 530 530 530 530 530 530 530 combustion chamber Width combustion mm 638 638 638 638 638 638 638 chamber Depth combustion mm 1183 1343 1503 1663 1823 1983 2143 chamber Volume m 0 310 0 354 0 396 0 439 0 481 0 523 0 565 Stand by losses 9 AT SOK W 315 358 413 451 494 505 555 Net weight kg 1802 2072 2238 2454 2638 2880 3057 order for the boiler to operate correctly it is imperative to respect the draught at the nozzle 0 at the nozzle Nominal operation top boiler power 2 CO 13 on fuel oil and 9 5 on natural gas 9 Ambient temperature 20 C 09 06 2011 300025088 001 B NXR4i 4 Installation 4 Installation 4 1 Regulations governing installation N Installation must be carried out in accordance with the prevailing regulations the codes of practice and the recommendations in these instructions 4 2 Package list See assembly instructions 4 3 Choice of the location 4 3 1 Main dimensions 1 Inscribed diameter in mm Front section 455 Tappedieannecion Intermediate section 530 CD Heating flow weld Equivalent diameter in mm 573 Heating return weld draining outlet 4 Sludge removal hole Rp 2 1 2 plugged Boiler type NXR4i 8 NXR4i 9 NXR4i 10 NXR4i 11 NXR4i 12 NXR4i 13 NXR4i 14
31. ydraulic CoOnfigctiolis eaten aste atte egest tkun iris ms qaot tea RU 14 4 5 1 Flushingithe system usare er m dr e ox en t Red e de or RR RA RO GR e de ox RO RR RE RA 14 4 52 SIUS DT MERIT e 14 4 5 3 Hydraulic connection of the heating 4 4 2 14 4 54 Salely VAG 15 4 5 5 Hydraulic connection of the water circuit for domestic use 15 4 6 Chimney CONMECHON i 16 4 6 1 dlc cR 16 4 6 2 Connection to the flue gas 16 4 7 Fuel oil or gas connections u u see merger s eee o he C er RR e o ROC RU RR RR RE Re 17 48 Electrical cte ee ee 17 4 9 Filling the system assesses ewe ne end wd Lune en Le ed Ane ew kaw d 17 5 COMMISSIONING aO RE ROO KY RU ROC ae RC RU HR aren 18 b switching kena sour RR EE RE RR RE EX en 18 6 1 Precautions required in the case of long boiler stops one or more years 18 6 2 Precautions r
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