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- Installation & Service Instructions Manual
Main 18 HE A Installation & Service Instructions Manual
Summary of 18 HE A
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© baxi heating uk ltd 2014 installation & service instructions he a range these instructions include the benchmark commissioning checklist and should be left with the user for safe keeping..
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2 © baxi heating uk ltd 2014 natural gas main 12 he a g.C.N o 41-467-16 main 15 he a g.C.N o 41-467-17 main 18 he a g.C.N o 41-467-18 main 24 he a g.C.N o 41-467-19 main 30 he a g.C.N o 41-467-20 © baxi heating uk ltd 2014 all rights reserved. No part of this publication may be reproduced or transmi...
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Installer notification guidelines 3 © baxi heating uk ltd 2014 choose building regulations notification route contact your relevant local authority building control (labc) who will arrange an inspection or contact a government approved inspector labc will record the data and will issue a certificate...
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Legislation 4 © baxi heating uk ltd 2014 this company declares that no substances harmful to health are contained in the appliance or used during appliance manufacture. The appliance is suitable only for installation in gb and ie and should be installed in accordance with the rules in force, and onl...
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Safe manual handling 5 © baxi heating uk ltd 2014 general the following advice should be adhered to, from when first handling the boiler to the final stages of installation, and also during maintenance. Most injuries as a result of inappropriate handling and lifting are to the back, but all other pa...
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© baxi heating uk ltd 2014 1.0 introduction 7 2.0 general layout 8 3.0 appliance operation 9 4.0 technical data 10 5.0 dimensions and fixings 11 6.0 system details 12 7.0 site requirements 16 8.0 flue options 21 9.0 plume displacement 26 10.0 installation 30 11.0 electrical 36 12.0 commissioning the...
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1.1 description 1. The main he a range are gas fired room sealed fan assisted condensing central heating boilers. 2. The maximum output of the main he a 12 is 40,330 btu/hr, 15 model is 52,000 btu/hr, 18 model is 60,770 btu/hr and 24 model is 75,000 btu/hr. The maximum output of the 30 model is pres...
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2.0 general layout 8 © baxi heating uk ltd 2014 2.1 layout (figs. 3,4,5 & 6) 1. Wall plate 2. Flue elbow 3. Heat exchanger 4. Burner 5. Air box 6. Fan protection thermostat 7. Fan assembly 8. Condensate trap 9. Pcb housing assembly 10. Gas tap 11. Gas / air ratio valve 12. Flow pipe connection 13. R...
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3.0 appliance operation 9 © baxi heating uk ltd 2014 3.1 1. Switched live on: when the switched live switches on if the flow temperature is less than the set point then pump overrun occurs. When the switched live switches on if the flow temperature is greater than the set point then pump overrun occ...
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Appliance category cat i 2h 4.0 technical data 10 © baxi heating uk ltd 2014 horizontal flue terminal diameter 110mm dimensions projection 150mm outercase dimensions overall height inc flue elbow - 750mm casing height - 600mm casing width - 390mm casing depth - 280mm weights kg packaged boiler carto...
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5.0 dimensions and fixings 11 © baxi heating uk ltd 2014 dimensions a 600mm b 280mm c 390mm d 150mm Ø min. E 162.5mm f 96mm side flue (left and right) for every 1m of horizontal flue length, the clearance above the top of the flue elbow should be 27.5mm to incorporate the 1.5° fall in the flue from ...
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6.0 system details 12 © baxi heating uk ltd 2014 6.1 water circulating systems 1. The appliance is suitable for use with open vent fully pumped systems and sealed systems . The following conditions should be observed on all systems: • the static head must not exceed 30m (100ft) of water. • the boile...
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6.0 system details 13 © baxi heating uk ltd 2014 6.3 pipework 1. The sizes of flow and return pipes from the boiler should be determined by normal methods, according to the requirements of the system. The connections on the boiler are 22mm. 2. A 20 °c (36°f) drop in temperature across the system is ...
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6.0 system details 14 © baxi heating uk ltd 2014 6.6 system controls this boiler does not require a bypass. This boiler does not require a permanent live. The pump only needs wiring directly to the boiler for fully trv’d systems. 1. To comply with part l1 of the building regulations the heating syst...
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6.0 system details 15 © baxi heating uk ltd 2014 6.7 sealed systems (fig. 13) 1. Safety valve - a safety valve complying with the requirements of bs 6750 part 1 must be fitted close to the boiler on the flow pipe by means of a horizontal or vertically upward connection with no intervening valve or r...
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7.0 site requirements 16 © baxi heating uk ltd 2014 7.1 location note: due to the high efficiency of the boiler a plume of water vapour will be discharged from the flue. This should be taken into account when siting the flue terminal. 1. The boiler may be fitted to any suitable wall with the flue pa...
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7.0 site requirements 17 © baxi heating uk ltd 2014 7.3 clearances (figs. 15 &16) 1. A flat vertical area is required for the installation of the boiler. 2. These dimensions include the necessary clearances around the boiler for case removal, spanner access and air movement. Additional clearances ma...
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7.0 site requirements 18 © baxi heating uk ltd 2014 7.6 condensate drain failure to install the condensate discharge pipework correctly will affect the reliable operation of the boiler. Careful consideration must be given to the possibility of the pipework being subject to freezing conditions and ap...
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7.0 site requirements 19 © baxi heating uk ltd 2014 7.6 condensate drain (cont.) 12. A boiler discharge pump is available, ‘multifit’ part no. 720648301. This pump will dispose of both condensate & high temperature water from the relief valve. It has a maximum head of 5 metres. Follow the instructio...
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7.0 site requirements 20 © baxi heating uk ltd 2014 n i i g f m i a a f h j,k d e h likely flue positions requiring a flue terminal guard c r a i j,k i l s b t u 7.7 flue note: due to the high efficiency of the boiler a plume of water vapour will be discharged from the flue. This should be taken int...
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8.0 flue options 21 © baxi heating uk ltd 2014 8.1 horizontal flue systems concentric the maximum equivalent lengths are 4m (horizontal) or (vertical). Their lengths exclude the standard elbow and flue/terminal assembly (horizontal) and terminal assembly (vertical). Any additional “in line” bends in...
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8.0 flue options 22 © baxi heating uk ltd 2014 y 8.2 twin & vertical flue systems concentric the maximum equivalent lengths are 4m (vertical). Their lengths exclude the standard elbow and terminal assembly (vertical). Twin flue the total maximum equivalent flue length is 150m. Note: each 1m of flue ...
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8.0 flue options 23 © baxi heating uk ltd 2014 key accessory size code no flue group b concentric flue system 110mm diameter a1 horizontal flue terminal 850mm 243013bax a horizontal flue terminal (incl elbow) 236921 b flue extension 1000mm 241695 500mm 241694 250mm 241692 c flue bend 93° 241687 d fl...
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8.0 flue options 24 © baxi heating uk ltd 2014 vertical flue adaptor gasket 8.4 for vertical flue systems 1. Undo the screws securing the blanking plate to the boiler top panel. Discard the plate. 2. Fix the vertical adaptor and gasket to the top panel with the previously removed screws. 8.5 for twi...
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8.0 flue options 25 © baxi heating uk ltd 2014 8.6 for roof terminals 1. In the case of a pitched roof 25 - 50 degrees, position the lead tile to replace/flash over existing roof tiling. Make an aperture in the roof suitable for the lower tube of the roof terminal and ensure the integrity of the roo...
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9.0 plume displacement 26 © baxi heating uk ltd 2014 9.1 plume displacement kit (p.D.K.) kit no 5121371 content of kit 1 70/110 concentric flue 1 1m 70 dia exhaust flue pipe 2 support brackets 1 93° elbow/plume outlet assembly 1 flue trim 2 “o” rings 1 elbow with gasket 1. This kit is recommended fo...
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9.0 plume displacement 27 © baxi heating uk ltd 2014 1 0 2 4 6 8 10 12 14 70Ø exhaust (metr es) concentric 70/110 flue (metres) 0 16 18 2 3 4 20 12, 15, 18 & 24 30 22 24 26 28 30 1 0 2 4 6 8 10 12 14 70Ø exhaust (metr es) concentric 70/110 flue (metres) 0 16 18 2 3 4 20 12, 15, 18 & 24 30 22 24 26 2...
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9.0 plume displacement 28 © baxi heating uk ltd 2014 9.3 general fitting notes - p.D.K. 1. Cut a hole in the external wall which the horizontal concentric flue assembly will pass through. 2. When completed the terminal must be at least 2 metres above ground level (fig. E). 3. Measure and cut to size...
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9.0 plume displacement 29 © baxi heating uk ltd 2014 500mm min. Plume outlet elbow 200mm min. 9.3 general fitting notes - p.D.K. (cont.) 16. For aesthetic purposes it is permissible to route the 70Ø exhaust in an enclosed box, but the air inlet and plume outlet must remain in free air. 17. It is als...
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10.0 installation 30 © baxi heating uk ltd 2014 check site requirements (section 7) before commencing. 10.1 initial preparation the gas supply, gas type and pressure must be checked for suitability before connection (see section 7.4). 1. Cut the banding and remove the fixing template, wall plate and...
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10.0 installation 31 © baxi heating uk ltd 2014 10.2 preparing the boiler 1. Remove the outer carton and packaging. 2. Lift the outercase upwards and remove. 3. Remove the internal packaging. Fig. 22a break off upper & lower pipe run options internal polystyrene packaging piece fig. 23 lower door pa...
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10.0 installation 32 © baxi heating uk ltd 2014 10.3 fitting the boiler (fig. 24) 1. Obtain retaining bracket and two m6 nuts from fitting bag. 2. Offer up the boiler to the wall plate using the lifting points shown in fig. 24 and locate the rear bottom edge onto the self locating support at the bas...
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10.0 installation 33 © baxi heating uk ltd 2014 10.6 making the gas connection 1. Connect the gas supply to the g 1 / 2 ( 1 / 2 in bspt internal) gas tap. This is located on the lower right side of the boiler, access by hinging down the pcb housing (see fig. 32). 10.7 fitting the flue before fitting...
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10.0 installation 34 © baxi heating uk ltd 2014 10.7 fitting the flue (cont) 6. Ensure the inner flue support bracket is positioned in the flue (fig. 28). 7. Engage the flue into the flue elbow using soap solution to ease the engagement ensuring the flue is assembled as shown (fig. 29). Rear flue on...
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10.0 installation 35 © baxi heating uk ltd 2014 10.8 making the electrical connections warning: this appliance must be earthed 1. The electrical connections are on the right hand side of the unit. 2. Undo the two screws securing the cable clamp and place to one side (fig. 31). 3. The main a 30 is fa...
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11.0 electrical 36 © baxi heating uk ltd 2014 11.1 schematic wiring diagram key to wiring colours b - blue bk - black w - white br - brown gy - grey r - red g - green g/y- green/yellow op - opaque y - yellow gas valve g op spark electrode g/y bk bk bk bk r w w flame detection electrode condensate tr...
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11.0 electrical 37 © baxi heating uk ltd 2014 wiring key b - blue bk - black br - brown r - red w - white g/y - green/yellow g - green gy - grey op - opaque y - yellow 11.2 illustrated wiring diagram gas valve fan condensate trap ch flow switch flow thermistor spark electrode flame detection electro...
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12.0 commissioning the boiler 38 © baxi heating uk ltd 2014 low high reset on in out gas service cock flow temperature adjustment screw fig. 34 fig. 35 fig. 36 open inlet gas pressure test point do not check gas pressure here 12.1 commissioning the boiler warning: the pcb control and fan assembly ar...
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12.0 commissioning the boiler 39 © baxi heating uk ltd 2014 set boiler to maximum rate* allow the combustion to stabilise. Do not insert probe to avoid ‘flooding’ the analyser. Perform flue integrity visual check examine all flue joints for soundness and ensure the system is adequately supported. Is...
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12.0 commissioning the boiler 40 © baxi heating uk ltd 2014 in out fig. 36a inlet gas pressure test point do not check gas pressure here 12.3 check the operational (working) gas inlet pressure 1. Ensure that all controls are calling for heat and maximum load is applied to the system. 2. With the boi...
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13.0 fitting the outer case 41 © baxi heating uk ltd 2014 13.1 fitting the outer case 1. Position the outercase over the boiler engaging the lugs in the side flanges over the hooks on the wall plate. Break off top or bottom panel as required to accommodate pipework runs (fig.37). 2. Using the two sc...
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14.0 servicing the boiler 42 © baxi heating uk ltd 2014 14.1 annual servicing 1. For reasons of safety and economy, it is recommended that the boiler is serviced annually. Servicing must be performed by a competent person in accordance with b.S. 7967-4. 2. After servicing, complete the relevant serv...
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14.0 servicing the boiler 43 © baxi heating uk ltd 2014 air box door panel lead terminals combustion box door panel fig. 39 fig. 41 fig. 40 sensing earth spark sleeve 14.2 annual servicing - inspection 1. Ensure that the boiler is cool. 2. The boiler cannot be switched off at the boiler, therefore i...
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14.0 servicing the boiler 44 © baxi heating uk ltd 2014 14.2 annual servicing - inspection (cont) 11. To clean the heat exchanger and burner proceed as follows: a) disconnect the electrical leads to the fan component protection sensor (fig. 42). B) loosen the screw retaining the gas injector pipe at...
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15.0 changing components 45 © baxi heating uk ltd 2014 15.1 changing components important: when changing components ensure that both the gas and electrical supplies to the boiler are isolated before any work is started. “the boiler cannot be switched off at the boiler, therefore it is important to i...
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15.0 changing components 46 © baxi heating uk ltd 2014 15.3 flowswitch (fig. 47) 1. Drain the boiler (see section 15.1 paragraph 2 & 3). 2. Remove the two screws on the support bracket. 3. Remove the clip securing the flow pipe to the flowswitch. 4. Disconnect the inline electrical connection. 5. Pu...
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15.0 changing components 47 © baxi heating uk ltd 2014 the fan and venturi, gas valve, injector pipe, condensate trap, fan protection sensor, spark and sensing electrodes can be accessed and changed on the removal of the airbox door panel. 1. Remove the airbox door panel by loosening the four 1 / 4 ...
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15.0 changing components 48 © baxi heating uk ltd 2014 the removal of the fan is necessary to enable the changing of the injector pipe, condensate trap and gas valve (see section 15.6). 15.7 injector pipe (fig. 53) 1. Remove the injector pipe by pulling out from the ‘o’ ring joint in the gas valve. ...
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15.0 changing components 49 © baxi heating uk ltd 2014 the burner and heat exchanger can be changed after removal of the combustion box door. To change the heat exchanger, the fan and burner must be removed first (see section 15.6 and 15.10). 1. Remove the combustion box door by removing the four se...
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15.0 changing components 50 © baxi heating uk ltd 2014 combustion box base central insulation panel support bracket burner 15.12 heat exchanger lower insulation pad (fig. 60) 1. Remove all components in the base of the airbox. 2. Remove the burner (see section 15.10). 3. Remove the four bolts securi...
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16.0 short parts list 51 © baxi heating uk ltd 2014 short parts list key g.C. Description manufacturers no. No. Part no. A e06 058 flow temperature thermistor (red) 240670 b e06 059 flow switch 242459 c e06 060 safety thermostat (black) 242235 d pcb 5129147 e fan 5109925 f gas valve 241900 g e06 085...
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17.0 fault finding 52 © baxi heating uk ltd 2014 low high reset on mains on led light (green) boiler on led light (green) lockout led light (red) lights off off off live & neutral reversed incoming live and neutral reversed. Go to ignition lockout section of the fault finding instructions. Go to fan...
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17.0 fault finding 53 © baxi heating uk ltd 2014 no switched live to boiler. Check systems controls and system wiring. 240v at b ? Check wiring from terminal block to pcb. Check for shorts on pump, fan & gas valve. Replace if shorted & replace fuse. Yes no replace pcb. Yes yes no no electrical suppl...
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17.0 fault finding 54 © baxi heating uk ltd 2014 dry-fire no fill system with water and bleed out all air. Replace pcb. Yes no yes no is the system full of water ? Is the pump running ? Unplug 5-way pcb connector. Is there continuity between h (run pump from switched live) ? Disconnect flow switch i...
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17.0 fault finding 55 © baxi heating uk ltd 2014 ignition lockout yes is there gas at gas valve inlet ? Check isolation valve and gas supply. Yes no reset lockout. Is there gas flow (check at meter) ? Remove 5-way connector from gas valve. Is there 240 vdc between i & j during ignition ? Is spark or...
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17.0 fault finding 56 © baxi heating uk ltd 2014 overheat lockout replace stat. Replace stat. Wiring from pcb to thermostats faulty. Yes no yes no no disconnect black stat on flow pipe. When flow continuity across stat ? Replace combustion chamber door seal & trim seal. No yes no yes reconnect stat....
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17.0 fault finding 57 © baxi heating uk ltd 2014 fan lockout rectify wiring. No yes unplug 3-way pcb connector & unplug fan. Is there continuity from n to o & from p to q ? No unplug the smaller of the 6-way pcb connector. Is there continuity from r to s & from t to u & from v to w ? Replace fan. Re...
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*all installations in england and wales must be to local authority building control (labc) either directly or through a competent persons scheme. A building regulations compliance will then be issued to the customer. Www.Centralheating.Co.Uk © heating and hotwater industry council (hhic) this commis...
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Www.Centralheating.Co.Uk it is recommended that your heating system is serviced regularly and that the appropriate service interval record is completed. Service provider before completing the appropriate service record below, please ensure you have carried out the service as described in the manufac...
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© baxi heating uk ltd 2014 7203601 - 06 (2/14) all descriptions and illustrations provided in 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 contained in this leaflet. All goods are ...