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Supplied By www.heating spares.co  Tel. 0161 620 6677

British Gas RD1

 

Installation & Servicing

35

FAULT FINDING

  FAUL

T FINDING FAUL

T FINDING FAUL

T FINDING FAUL

T FINDING FAUL

T FINDING FAUL

T FINDING

Check all connections

to PCB are correctly

made and secure.

 If no fault found,

replace PCB

Reset the overheat 'stat. Set control

'stat to maximum.  Allow the boiler to

reach temperature - if the overheat

'stat  trips again, measure flow

temperature.

If above 90°C replace control 'stat.

If below 90°C replace overheat 'stat.

START

Press the lockout reset switch.

Check the mains supply to the

terminal block and that there is a

demand  for heat. Expect 230 V AC

NO

YES

NO

Is there a live supply  on

the overheat 'stat?

Expect 230 V AC

Is the hot surface igniter glowing?

YES

YES

YES

Change fan

YES

NO

Rectify bad connection

Check mains supply and fuses.

Check programmer and system

thermostats are all ON. Check that

boiler plug and socket are OK and

fully connected.

Check that the boiler thermostat is

set at maximum and LED 4 is ON.

Is the fan turning ?

Check all connections to PCB are

correctly made and secure.

If no fault found change PCB.

YES

Check pressure switch sensing

pipes for blockages, bad

connections and reversed

connection.

Is pressure difference at switch

greater than 0.9 mbar?

Change fan.

Is fault

corrected?

YES

NO

Change pressure

switch. Is fault

corrected?

Is the boiler casing

correctly fitted?

Does the main burner  light ?

NO

YES

YES

Does the hot

surface

ignitor turn

off?

NO

Is there a gas supply

to the boiler?

Is the pilot injector

blocked?

YES

Replace

gas valve

NO

Is there a supply on terminals of

main gas valve? Expect 230 V AC

YES

NO

YES

NO

NO

Is there a supply on the fan

connector at PCB. Expect 230 V AC.

YES

YES

NO

NO

Is there a supply

voltage at the gas

valve?

Expect 230 V AC

Can the overheat 'stat

be reset when the

system is cold ?

NO

YES

NO

Replace board BUT, before

attempting to start boiler,

check for short between live

and neutral, also between live

and earth, on all items

plugged into PCB.

Check all connections to PCB are

correctly made and secure.

If no error found, replace PCB.

YES

NO

Has the fuse blown on PCB ?

Refer to Frame 32.

Is there a

supply at the

fan ? Expect

230 V AC

Replace the overheat thermostat.

Does main burner

cross-light from pilot?

Is the main burner

injector clear?

Replace main gas

solenoid valve

Change igniter. Does

igniter work?

NO

NO

NO

Component

LED 3*

LED 4*

Application of power.

Flash > 1/sec in sync with LED 4

Flash  > 1/sec in sync with LED 3

Control 'stat open circuit or

On.

On.

 waiting for demand.
Fan start up.

Off.

Flash > 1/sec

Run.

Off.

On.

Pump over-run.

On

Off.

Lock-out.

Flash  < 1/second.

Off.

Sensor Faults

Flash > 1/second.

 Off.

Reverse polarity.

Flash  > 1/sec alternately with LED 4.

Flash  > 1/sec alternately with LED 3.

*  

Refer to Frame 68

Summary of Contents for 30 RD1

Page 1: ...ww heating spares co Tel 0161 620 6677 INSTALLATION M A N U A L British Scottish Gas RD1 the wall hung boiler Wall hung gas fired fanned flue boiler 30 100 RD1 Installers guide to central heating boil...

Page 2: ...hatever the system demands Complete range There are 7 models in the range All models include a Downward Routing Pipe Kit and an overheat thermostat Full system suitability Most models are suitable for...

Page 3: ...water head m ft 0 45 1 5 Electrical supply 230 V 50 Hz Boiler power consumption 150W Fuse rating External 3A Internal F2A to BS 4265 Water content litre gal 2 7 0 6 3 65 0 8 4 65 1 0 4 65 1 0 Dry Weig...

Page 4: ...e through orifices which in this case are concentric The fan is down stream of the combustion chamber I2H An appliance designed for use on 2nd Family gas Group H only B G Certified P I No 87 BL 27 Des...

Page 5: ...water boilers of rated input not exceeding 60 kW BS 5449 Forced circulation hot water systems BS 5546 Installation of gas hot water supplies for domestic purposes 2nd Family Gases BS 7593 Treatment o...

Page 6: ...used inside the building the space in which the boiler is to be installed must be at least wide enough to accommodate the tool c If using the Complete Sealed System Unit then refer to the instructions...

Page 7: ...mbar MUST be available at the boiler inlet with the boiler operating Installation pipes MUST be fitted in accordance with BS 6891 Pipework from the meter to the boiler MUST be of an adequate size 100...

Page 8: ...ance is installed in a room containing a bath or shower then the appliance and any electrical switch or appliance control utilising mains electricity should be so situated that it cannot be touched by...

Page 9: ...boiler A suitable pump is a domestic circulator capable of providing an 11 C 20 F temperature differential e g Grunfos UPS 15 50 or equivalent The vertical distance between the pump and feed expansio...

Page 10: ...expansion vessel must be connected at a point close to the inlet side of the pump the connecting pipe being not less than 15mm 1 2 nominal size and not incorporating valves of any sort b The vessel c...

Page 11: ...ld feed pipe from the cistern should include a non return valve and a stop valve with an automatic air vent connected between them the stop valve being located between the system and the automatic air...

Page 12: ...box 24 Pressure switch 30 Fan Note Gravity horizontal pipes should be ABOVE ceiling level and as SHORT as possible A MINIMUM inclination of 25mm per 3m run 1 per 10 is required to avoid air locks If t...

Page 13: ...nstructions Hardware Pack listed below Wall mounting template Wall mounting plate Side outlet terminal mounting plate Flue extension tube Boiler sealing ring Flue elbow Downward routing pipe kit Boile...

Page 14: ...oiler terminal box and if applicable the extension flue box es 10 PACKAGING AND CASING REMOVAL 11 DOWNWARD ROUTING PIPE KIT Product Qty Downward pipe routing bracket 2 off M8 Spacing pillar 1 off M5 S...

Page 15: ...upport bracket It is MOST IMPORTANT that the boiler is installed in a vertical position Flue length mm Accessories Product No Up to 600 B Pack 1 off 150 308 600 to 1550 B Pack 1 off D Pack 1 off 15030...

Page 16: ...brackets supplied in a separate kit must be used These brackets are secured to the wall mounting plate and it is essential to use only those holes as shown on the wall mounting template Care MUST be...

Page 17: ...rably with a 125mm 5 core boring tool ensuring that the hole is square to the wall If the hole has been accurately cut with a drill then making good the wall faces is not essential as seals are provid...

Page 18: ...ures correct alignment of the flue terminal 2 Drill 3 holes 3 2mm 1 8 dia through the outer flue duct 4 Stick the self adhesive foam strip provided in the hardware pack onto the flue immediately behin...

Page 19: ...e flue only 1 The boiler is supplied for rear outlet installation Remove the blanking plate from the direction required and use this to blank off the rear outlet Side and rear flue 2 Lift the boiler o...

Page 20: ...off see Frame 12 600 to 1550 B Pack 1 off D Pack 1 off see Frame 12 1550 to 2500 B Pack 1 off D Pack 2 off see Frame 12 2500 to 3000 B Pack 1 off D Pack 3 off see Frame 12 Note Side flue shown 26 FLUE...

Page 21: ...ed A mains supply of 230 V 50 Hz is required All external controls and wiring must be suitable for mains voltage Wiring should be in 3 core PVC insulated sheathed cable not less than 0 75mm2 24 x 0 2m...

Page 22: ...proprietary system is used follow the instructions supplied by the manufacturer Advice on required modifications to the wiring may be obtained from the component manufacturers EC1 EC2 Volt Free Conta...

Page 23: ...w w w CH2 b b r r br b pk y w w gy w or or r b b r r w w b br y y y g y g y g y g pk y w pk y r r r w 34 PICTORIAL WIRING LEGEND b blue bk black br brown r red y yellow w white or orange v violet pk p...

Page 24: ...wiring 2 For numbering of terminals on thermostats see the manufacturer s literature 3 This is a fully controlled system set the boiler thermostat to maximum 4 Switchmaster Smiths valves are similar b...

Page 25: ...ole frost thermostat which should suffice for all systems which do not use the OFF terminals of the programmer Diagram B shows a change over frost stat which will cover most systems which do use CH OF...

Page 26: ...a a flexible tube 5 Swing the control box back into its working position 6 Switch the electricity supply ON and check that all external controls are calling for heat 7 Press the boiler reset switch H...

Page 27: ...ler you may wish to undertake the service contract yourself or alternatively offer to the customer the benefits of the British Gas Services details of which are outlined in the household pack supplied...

Page 28: ...ner support strap to the combustion chamber Remove the M5 pozi situated at the LH bottom rear of the burner and pull the burner downwards to disengage the retention tab Remove the burner to a safe pla...

Page 29: ...to the fan Disconnect the connector from the fan and slide into the flue 4b Side or top flue Slacken off two M4 screws securing the flue elbow and flue connector Disconnect the flue connector from the...

Page 30: ...checking the injector as detailed in Frame 48 and ensuring that there is an inlet pressure of 20 mbar available the pilot does not light then contact British Gas Services Relight in accordance with In...

Page 31: ...trical leads from the rear of the switch 12 Press in the 2 side retaining clips and remove the switch 13 Replace and re assemble in reverse order 14 Check the operation of the boiler 54 CONTROL POTENT...

Page 32: ...etention tab and remove the burner 4 At this stage the main burner injector can be removed checked cleaned or replaced as required Ensure that an approved jointing compound is used sparingly 5 Fit the...

Page 33: ...he mounting posts and withdraw from the control box 6 Fit the new PCB and re assemble in reverse order 7 Check the operation of the boiler Fuse To change the fuse prise the top off the holder and dise...

Page 34: ...sembly Refer to Frame 46 3 Drain the system 4 Disconnect the water connections If compression fittings are used then cut the pipes both above and below the fittings in order to allow the heat exchange...

Page 35: ...fan Is fault corrected YES NO Change pressure switch Is fault corrected Is the boiler casing correctly fitted Does the main burner light NO YES YES Does the hot surface ignitor turn off NO Is there a...

Page 36: ...ot burner injector HONEYWELL 4580 1075002 30 80 1 004982 386 131 Pilot burner injector HONEYWELL 4580 1075001 100 1 004 981 15 308 358 Pilot burner head Q359A with 308 358 Honeywell 4580 1075002 injec...

Page 37: ...rvicing 37 SHORT LIST OF PARTS LEGEND Numbers up to 51 relate to the B G spares list 10 Burner manifold 11 Air box and pilot assembly 12 Main burner 13 Main burner injector 16 Pilot shield 17 Gas cont...

Page 38: ...Installation Servicing Cla 1801 58A 26 21A LED 1 LED 2 LED 3 LED 4 23A Fuse SHORT LIST OF PARTS LEGEND 19 Control box 21A Thermostat potentiometer 26 Thermostat knob 23A Printed circuit board 58A Lock...

Page 39: ...Supplied By www heating spares co Tel 0161 620 6677 British Gas RD1 Installation Servicing 39...

Page 40: ...1994 Quality System accepted by BSI British Gas Services Limited Registered in England No 3141243 Registered Office Charter Court 50 Windsor Road Slough Berkshire SL1 2HA British Gas Services Ltd has...

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