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It may be necessary to repressurise the system occasionally (when the 

water pressure falls below 0.7). A filling device (the filling loop) will be fitted 

on the system. This may be on the boiler itself, or on pipework near to the 

boiler.

Important

If the water pressure requires regular re-pressurising a fault or 

leak is indicated. Seek advice from your installer.

Depending on which filling loop is fitted, a temporary filling loop consists of 

two isolating taps and a separate filling pipe with connection fittings.
Only when repressurising should the filling pipe be connected between the 

two taps. Ensure that the nuts on the pipe ends are tightened onto the 

taps.

1. Fully open one of the taps first, and then while watching the pres­

sure gauge, carefully open the second tap. 

Important

The system pressure is shown at all times on the pressure gauge 

and can be viewed on the display when there is power to the boil­

er.

2. When the figures on the display or needle on the pressure gauge in­

dicate between 1 and 1.5 bar turn both taps off.

3. Disconnect the filling pipe from the taps (a small amount of water 

may be present) and remove it. Keep the pipe in a safe place for fu­

ture use.

4. If blanking caps are available fit them to the taps. 

See

Go to the "How to videos" section of the "Information & advice" 

page at www.baxi.co.uk for further details.

5. When the correct pressure is restored the boiler will reset automati­

cally.

Fig.9

Water pressure

PN-0000373

6  Maintenance

18

7678872 - Draft A - 22052017

Summary of Contents for 15

Page 1: ... keep these instructions in a safe place If you move house please hand them over to the next occupier United Kingdom en User Guide High Efficiency Wall Hung Condensing Gas Boiler Potterton Assure System 15 18 ...

Page 2: ...using the product and keep it in a safe place for later reference In order to ensure continued safe and efficient operation we recommend that the product is serviced regularly Our service and customer service organisation can assist with this We hope you enjoy years of problem free operation with the product ...

Page 3: ...rinciple 12 4 2 1 In operation 12 4 3 Control panel description 12 4 3 1 Description of the control panel 12 4 4 Accessories and options 13 4 4 1 Optional accessories 13 5 Operation 14 5 1 Start up 14 5 1 1 Operation checking procedure basic fault identification 14 5 2 Use of the control panel 16 5 2 1 Using the control panel 16 5 3 Shutdown 16 5 4 Frost protection 16 6 Maintenance 17 6 1 General ...

Page 4: ...11 1 General 26 11 2 Standard warranty terms and conditions 26 12 Appendix 28 12 1 Product fiche Boiler space heaters 28 12 2 Package fiche boilers 29 Contents 4 7678872 Draft A 22052017 ...

Page 5: ...ler can be iso lated at the inlet valves by turning their taps through 90 1 4 turn downwards A ON B OFF For advice please contact your Installer Annual Service Provider or Baxi Customer Support The Service Division of Baxi You can contact Baxi Customer Support on telephone number 0344 871 1545 When contacting Baxi Customer Support it will be useful to have the Benchmark Checklist at the back of th...

Page 6: ...and clear explanation of its operation The installer is legally required to complete a commissioning checklist as a means of complying with the ap propriate Building Regulations England and Wales All installations must be notified by the installer to Local Area Building Control either directly or through a Competent Persons Scheme A Build ing Regulations Compliance Certificate will then be issued ...

Page 7: ...in good working order Give all the instruction manuals to the user 1 3 3 Manufacturer s liability Our products are manufactured in compliance with the requirements of the various Directives applicable They are therefore delivered with the marking and any documents necessary In the interests of the quality of our products we strive constantly to improve them We therefore reserve the right to modify...

Page 8: ...rer will not accept any liability for resulting loss damage or injury The manufacturer will not accept any liability whatsoever for loss damage or injury arising as a result of failure to observe the instructions for use maintenance and installation of the appliance 2 2 Additional documentation Various timers external controls etc are available as optional extras Full details are contained in the ...

Page 9: ...DHW Domestic hot water PCU PCB for managing burner operation Pnc Condensing output SU Safety PCB 2 About this manual 7678872 Draft A 22052017 9 ...

Page 10: ...re System 15 18 Nominal electrical power supply voltage V 230 230 Nominal electrical power supply frequency Hz 50 50 Nominal power consumption when firing W 100 100 External fuse rating Amp 3 3 Tab 5 Other specifications Potterton Assure System 15 18 Degree of protection against humidity EN 60529 IP IPX5D IPX5D Boiler lift weight dry kg 28 06 28 06 Dimensions height width depth mm H 700 W 390 D 28...

Page 11: ...ap sump 2 Condensate drain 3 Heating circuit water flow 5 Gas inlet 6 Pressure relief pipe 8 Heating circuit water return 9 Pump drain point 10 Boiler drain point on flow isolation pipe Not shown 11 Cable entry points The clearances shown in the diagram are minimum requirements to allow for case removal spanner access and air movement These should be ob served at all times and kept clear of obstru...

Page 12: ...on label This is for user reference 4 2 Operating principle 4 2 1 In operation Whilst the boiler is in operation cooled flue gases are discharged through the flue gas discharge pipe This may appear as a cloud of steam which is normal Condensed water is discharged from the boiler heat exchanger into a pipe the condensate drain This pipe must never be altered or re routed ex cept by a qualified prof...

Page 13: ... condensate PRV combined pump 720644401 Multifit 1m condensate drain pipe trace heating element 720664101 Multifit 2m Condensate drain pipe trace heating element 720664201 Multifit 3m condensate drain pipe trace Heating element 720664401 Multifit 5m condensate drain pipe trace heating element 5121379 Multifit remote secondary PRV kit 248221 Multifit filling loop Multifit permanent filling link Mul...

Page 14: ...Check electrical supply to boiler is switched on NO YES Is the Burner Flame showing Burner Flame Indicates burner is on Boiler operating satisfactorily NO YES YES YES Is the E and R symbol illuminated or flashing YES Press the Reset Button e g press and hold for 5 seconds If it does not reset CONTACT YOUR INSTALLER OR SERVICE ENGINEER Reset Symbol Is the Spanner symbol illuminated or flashing YES ...

Page 15: ... external timer Ensure timer is set for Central Heating ON see any instructions supplied with timer NO YES YES NO 15 10 5 20 2 5 15 10 5 20 2 5 Turn Room Thermostat to maximum setting typical example shown CH ON CH OFF bar 0 1 2 3 4 Is the Central Heating System Pressure between 1 0 and 2 5 bar If the reading falls below 1 0 bar repressurise the system NO Error Code 118 showing low pressure YES If...

Page 16: ...s to be unoccupied it is advised to drain the sys tem if the electricity and gas supplies are to be turned off Your in staller will be able to offer advice 5 4 Frost protection Where possible draining the system should be avoided If the system is to be unused during winter months several precautions must be taken Any parts of the system that are in unheated areas of the dwelling should be fitted w...

Page 17: ... in the central heating system Important If the water pressure is lower than 0 7 bar the system must be topped up See Re pressurising the system Important If the water pressure drops below 0 5 bar the boiler will not work 2 Check radiators for leaks and especially in damp areas for rust 3 Open and close the radiator valves several times a year to ensure they can still be rotated Caution Only a qua...

Page 18: ...ened onto the taps 1 Fully open one of the taps first and then while watching the pres sure gauge carefully open the second tap Important The system pressure is shown at all times on the pressure gauge and can be viewed on the display when there is power to the boil er 2 When the figures on the display or needle on the pressure gauge in dicate between 1 and 1 5 bar turn both taps off 3 Disconnect ...

Page 19: ...still ad equate Important If the water pressure is lower than 0 7 bar the water must be top ped up If necessary repressurise the system recommended pressure between 1 and 1 5 bar when cold 10 Reset the room thermostat to the desired temperature The purpose of the function is to remove as much air as possible from the heating system 1 Turn off the power to the boiler and rotate the CH control knob ...

Page 20: ...e boiler s electrical connection 3 Wait approximately ten minutes until the radiators feel cold 4 Connect a drain hose to the lowest draining point Place the end of the hose in a drain or at a place where drained pipe water will not cause any damage 5 Open the central heating system fill drain valve Drain the installa tion Warning The water may still be hot 6 Close the drain valve when no more wat...

Page 21: ...an or fan wiring fault 270 Circulation fault Dry fire 321 Hot water NTC fault 384 False flame The display shows two types of signals and R In both cases the display shows symbol and the numeric value of the error see the table of error codes above The spanner symbol appears it cannot be reset by the user Please contact your Installer Annual Service Provider or Baxi Customer Support You can contact...

Page 22: ...e system The boiler is not working The temperature set point for the heating is too low Increase the value with the CH temperature knob or if a room thermostat is connected increase the temperature on the room thermostat No demand for heating Ensure that timers thermostats are calling for heat No power supply Check that the boiler is being supplied with power Check the fuses and switches The water...

Page 23: ...ystem to decommission If your boiler needs to be decommissioned either temporarily or perma nently the following should be performed 1 Switch off the boiler s electrical connection 2 Close the gas isolation tap 3 Drain the central heating system Seek the advice of your installer 8 Decommissioning 7678872 Draft A 22052017 23 ...

Page 24: ...posal 9 1 Disposal and recycling Caution Removal and disposal of the boiler must be carried out by a quali fied person in accordance with local and national regulations 9 Disposal 24 7678872 Draft A 22052017 ...

Page 25: ...s A modulating thermostat in combination with thermostatic radiator valves saves energy and offers considerable comfort This combination gives you flexibility with the temperatures Do not fit thermostatic radiator valves in the room in which the room thermostat is installed Completely closing and opening thermostatic valve radiators causes un desirable temperature fluctuations Open and close therm...

Page 26: ...ster your warranty online at www baxi co uk registration Annual service A service must be completed every 12 months from the date of installation to maintain your warranty This service must be completed by one of the following A Gas Safe registered installer engineer Baxi Customer Support call us 0344 871 1545 Please make sure that your engineer has logged the service information at the back of th...

Page 27: ...r Please note that for in warranty repairs our engineers will ask to see your service history record completed Benchmark Checklist and details of your installer These can all be found in the Installation and Service manual 11 Warranty 7678872 Draft A 22052017 27 ...

Page 28: ...15 18 Seasonal space heating energy efficiency class A A Rated heat output Prated or Psup kW Seasonal space heating energy efficiency Annual energy consumption GJ Sound power level LWA indoors dB See For specific precautions about assembling installing and main taining Safety page 5 12 Appendix 28 7678872 Draft A 22052017 ...

Page 29: ...d characteristics Boiler and supplementary heat pump installed with low temperature heat emitters at 35 C Seasonal space heating energy efficiency class of package Seasonal space heating energy efficiency of package OR Seasonal space heating energy efficiency in Supplementary heat pump Tank rating Collector efficiency in Tank volume in m Collector size in m Seasonal space heating energy efficiency...

Page 30: ...space heater Tab 11 Weighting of boilers Psup Prated Psup 1 2 II package without hot water storage tank II package with hot water storage tank 0 0 0 0 1 0 3 0 37 0 2 0 55 0 70 0 3 0 75 0 85 0 4 0 85 0 94 0 5 0 95 0 98 0 6 0 98 1 00 0 7 1 00 1 00 1 The intermediate values are calculated by linear interpolation between the two adjacent values 2 Prated is related to the preferential space heater or c...

Page 31: ...hnological information contained in these technical instructions as well as any drawings and technical de scriptions supplied remain our property and shall not be multiplied without our prior consent in writing Subject to alterations ...

Page 32: ...itions visit www baxi co uk terms Failure to adhere to terms and conditions will void your manufacturer s warranty Baxi Brooks House Coventry Road Warwick CV34 4LL Please ensure the boiler is installed in accordance with these installation instructions and that you adhere to the Building Regulations e oe All descriptions and illustrations provided in this document have been carefully prepared but ...

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