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Qudos 28s

Fan Powered High Efficiency

Modulating Domestic Condensing

Gas System Boiler

User, Installation And Servicing

Instructions

CE/PI No : 87BR36

Qudos 28s - GC No : 41-930-17

Qudos 28sP - GC No : 41-930-18

These instructions must be left either with

the user or next to the site gas meter.

34 West Common Road

Hayes, Bromley, Kent BR2 7BX

Tel. +44 (0)20 8462 0262 Fax. +44 (0)20 8462 4459

email : [email protected] web : www.keston.co.uk

COMPLIANT WITH BUILDING REGULATION PART L1 & L2

SEDBUK A RATED

WD420/3/2007

The Keston Qudos 28s & Qudos 28sP Boilers

Содержание Qudos 28s

Страница 1: ...930 17 Qudos 28sP GC No 41 930 18 These instructions must be left either with the user or next to the site gas meter 34 West Common Road Hayes Bromley Kent BR2 7BX Tel 44 0 20 8462 0262 Fax 44 0 20 84...

Страница 2: ...Data 2 5 Optional Accessories 2 6 Performance Data 3 BOILER LOCATION 3 1 Dimensions Minimum Clearances 3 2 Service Connections 3 3 Position 3 4 Electrical 3 5 Boiler Size Selection 3 6 Gas Supply 3 7...

Страница 3: ...strated Wiring Diagram 6 7 Exploded Assembly Diagrams 7 SERVICING 7 1 Pre Service Checks 7 2 Recommended Routine Service 8 REPLACEMENT OF PARTS 8 0 General 8 1 Precautions 8 2 Access 8 3 Replacement P...

Страница 4: ...ap fixing washers 2 Inside accessories bag Condensate Trap Gasket 1 Inside accessories bag 50 mm muPVC Pipe 2 Inside boiler case 50 mm muPVC Elbow 2 Inside boiler case Document List Item Quantity Loca...

Страница 5: ...orners of the boiler back plate When lifting this appliance the back should be kept straight at all times Avoid twisting at the waist reposition the feet instead Avoid upper body bending when holding...

Страница 6: ...mp cloth and finish with a dry cloth 1 3 BOILER SETUP OPERATION Check that the gas supply from the gas meter is turned on Switch on the electrical supply to the boiler The display will now run through...

Страница 7: ...fault Display The above is an abbreviated list of possible error codes If the code is not in the list above consult a CORGI registered engineer A full list of codes can be found in Chapter 6 of this m...

Страница 8: ...red in the event of any warranty work being required There is also Service Interval Record Chapter 10 to be completed after each annual service visit These forms Chapter 10 should be kept in a safe pl...

Страница 9: ...ptional legionella prevention function Further the Qudos 28s is developed with the concept that the gas boiler in the modern home is often supplemented by alternative or renewable energy sources As a...

Страница 10: ...lastic pipe Gas is mixed with combustion air at the inlet to the fan The gas flow is automatically regulated by the gas valve according to the air flow generated by the fan The gas and air are thoroug...

Страница 11: ...compatible energy management systems An optional Keston room controller can be connected which will provide enhanced controls such as room compensation to further increase efficiency and comfort leve...

Страница 12: ...2 Air Supply BS 5482 1 Domestic Propane and Butane Burning Installations BS 7074 1 Expansion Vessels BS 7593 Treatment of Water in Hot Water Central Heating Systems BS 7671 Requirements for Electrica...

Страница 13: ...utlet and Air Intake Length m 120 2 5 OPTIONAL ACCESSORIES A range of accessories are available from Keston Boilers Ltd to compliment an installation Terminal wall sealing collars are available to mak...

Страница 14: ...2 General Instruction The Keston Qudos 28s Qudos 28sP Boilers Installation Servicing Instructions Page 9 Qudos 28s Qudos 28sP Nat Gas G20 LPG G31 Min Input Gross CV kW Btu h 7 8 26 600 7 6 26 000 Max...

Страница 15: ...he industry wide Benchmark initiative Qudos 28S boiler manual includes Gas Boiler Commissioning Checklist Chapter 10 This form should be completed by your installer at the end of the installation and...

Страница 16: ...in any room or internal space although particular attention is drawn to the requirements of the current IEE Wiring Regulations and in Scotland the electrical provisions of the Building Regulations ap...

Страница 17: ...refore accept up to TWO switched live 230VAC signal inputs such as heating and hot water or radiators and underfloor heating zones Alternatively a Keston Room Controller can be connected directly via...

Страница 18: ...nsation Ext Sensor A Keston outside temperature sensor may be connected as an option The boiler will automatically detect this connection and will operate on a weather compensation basis when receivin...

Страница 19: ...length of run from the meter to the boiler at a supply rate of 28 4kW i e a natural gas supply should be considered to be a minimum of 22mm diameter reducing to 15mm at the boiler If gas runs greater...

Страница 20: ...tal Water Content of system in excess of 125 litres 1 0 bar Vessel charge initial system pressure 3 0 bar Safety Valve Setting k The boiler is supplied with an integral expansion vessel of 8l capacity...

Страница 21: ...e It is advisable to incorporate a boiler by pass in the system especially if thermostatic radiator valves are used The flow return differential should be 10o C to 20o C To comply with the Building Re...

Страница 22: ...a function Refer to Chapter 4 for more detail 3 7 5 Filling The System The system should be filled using a G24 approved filling loop The system pressure should be set to between 1 0 and 2 0 bar To dis...

Страница 23: ...0m 1 0m 37 0m Flue outlet uses one 92 5o sweep elbow Hence maximum length permissible i e c d in figure 3 8 2 20 0m 1 0 m 19 0m 3 8 3 Slope Horizontal flue outlet pipework MUST slope at least 2 degre...

Страница 24: ...car port not recommended 1 200 1 200 I From terminal facing a terminal 100 600 H From surface or boundary facing a terminal 100 200 G Above ground or balcony or roof 50 200 F From internal or external...

Страница 25: ...th facility to connect to a drain point underneath the appliance The condensate trap is packed loose with the appliance and MUST be fitted BEFORE firing the appliance Use only plastic piping and do no...

Страница 26: ...cleaning and testing a Lift and locate the boiler onto the stud and the two locating pegs protruding from the wall bracket lift the boiler via the back frame only b Lower the boiler for hanging on th...

Страница 27: ...and make good all holes wall sealing collars are available to make good hole areas on the wall face part number C 08 0 00 07 0 g Support any pipes whose route could be displaced either of its own acc...

Страница 28: ...ectrical supply must be as specified in Chapter 3 Section 3 4 Electrical Supply WARNING THIS APPLIANCE MUST BE EARTHED 2 All external controls and wiring must be suitable for mains voltage Supply wiri...

Страница 29: ...2 1 CH1 1 0 10V 0v 2 SENSOR 1 2 SENSOR 2 SENSOR 1 1 2 NO OPEN SOL DHW TS FLOW ANALOG DEMAND EXTERNAL SENSOR MAIN SUPPLY SOLAR PUMP CH DEMAND 1 N N SL1 SL2 E L LOCKOUT COM NO 2 C 10C 0 09 00 0 EXTERNA...

Страница 30: ...ux or solder the system must be flushed cold again before proceeding Reduce the pressure to the Initial System Design Pressure Vent the system Gas Supply The complete gas installation up to the boiler...

Страница 31: ...s inlet pressure is satisfactory set the gas pressure check the gas input Full details of this procedure are given in Section 5 9 Timing The Gas Meter Combustion Testing It is advisable on all install...

Страница 32: ...ushed cold again before proceeding e Reduce the pressure to the Initial System Design Pressure Vent the system 5 2 GAS SUPPLY The complete gas installation up to the boiler service cock must be checke...

Страница 33: ...lthough the gas pressure is preset at the factory it is required to assure proper combustion by measuring gas input and the level of carbon dioxide or oxygen and carbon monoxide in the flue outlet fro...

Страница 34: ...til the display shows 100 Press the ENTER button and the boiler will be locked on at Maximum rate Check the setting is within the range established in step 3 If not r e p e a t the process again from...

Страница 35: ...cal supply if necessary b The function of the lockout feature must be explained If the display shows E 02 this means that the boiler has failed to light Press the Reset button and wait i If lockout re...

Страница 36: ...t its power output and pump speed to best match the demands of the system at any time 6 The burner will continue to operate until the gas valve interrupts the gas supply The gas valve will be closed b...

Страница 37: ...e temperature sensor is detected 7 System water pressure in bar Maximum 2 7 bar minimum 0 4 bar The boiler will shut down if the water pressure drops below 0 4 bar 6 Actual Flue Temperature display in...

Страница 38: ...he connections and wires to the return thermistor are intact and connected E37 Flow thermistor open circuit not connected check the connections and wires to the flow thermistor are intact and connecte...

Страница 39: ...out 8 Outside temperaure display indicates a small graph on the bottom row NB Only relevant if an outside temperature sensor is detected 7 System water pressure in bar Maximum 2 7 bar minimum 0 4 bar...

Страница 40: ...6 4 FUNCTIONAL FLOW WIRING DIAGRAM WD420 3 2007 Chapter 6 Fault Finding The Keston Qudos 28s Qudos 28sP Boilers Installation Servicing Instructions Page 35...

Страница 41: ...6 5 ELECTRICAL WIRING DIAGRAM WD420 3 2007 Chapter 6 Fault Finding The Keston Qudos 28s Qudos 28sP Boilers Installation Servicing Instructions Page 36...

Страница 42: ...6 6 ILLUSTRATED WIRING DIAGRAM WD420 3 2007 Chapter 6 Fault Finding The Keston Qudos 28s Qudos 28sP Boilers Installation Servicing Instructions Page 37...

Страница 43: ...6 7 Exploded Assembly Diagrams 6 7 1 Boiler Controls Assembly WD420 3 2007 Chapter 6 Fault Finding The Keston Qudos 28s Qudos 28sP Boilers Installation Servicing Instructions Page 38...

Страница 44: ...6 7 2 Waterway Condensate Flue Assembly WD420 3 2007 Chapter 6 Fault Finding The Keston Qudos 28s Qudos 28sP Boilers Installation Servicing Instructions Page 39...

Страница 45: ...WD420 3 2007 Chapter 6 Fault Finding The Keston Qudos 28s Qudos 28sP Boilers Installation Servicing Instructions Page 40...

Страница 46: ...6 7 3 Air Gas Assembly WD420 3 2007 Chapter 6 Fault Finding The Keston Qudos 28s Qudos 28sP Boilers Installation Servicing Instructions Page 41...

Страница 47: ...6 7 4 Casing Assembly WD420 3 2007 Chapter 6 Fault Finding The Keston Qudos 28s Qudos 28sP Boilers Installation Servicing Instructions Page 42...

Страница 48: ...tor Kit Q 10S 0 09 00 0 62 Condensate Trap Kit Q 10S 0 16 00 0 58 Flow Return Thermistor Q 10S 2 08 00 0 59 Flue Sensor Q 10S 2 09 00 0 101 Pressure Sensor C 10C 2 17 00 0 57 Flow Thermostat Q 10S 2 0...

Страница 49: ...ess replace if necessary e Check for condensate leaks f Check for water soundness g Inspect the flue vent and air intake pipework Joints must be sound and all pipework well bracketed h Check that ther...

Страница 50: ...e flue pipe This is situated on the flue spigot out of the cabinet j Carry the full procedure detailed in section 5 7 COMBUSTION TESTING MANDATORY k Replace the combustion test point plug l Recheck th...

Страница 51: ...e service cock WARNING Parts of the boiler internal wiring will remain live even after setting the User Controls to Standby Shut off the power supply at the isolating switch before working on the appl...

Страница 52: ...ions iv Unscrew the retaining nuts and remove the thermistor v Reassemble Section 8 3 NB When fitting the new thermistor it is an advantage to smear a thin film of heat sink compound between the therm...

Страница 53: ...2 item 57 i Isolate the appliance Section 8 1 ii Gain access Section 8 2 iii Remove the push on connector from the sensor taking note of the correct position iv Unscrew the bolts securing the stat Fig...

Страница 54: ...ers Fig 6 7 2 2 2 item 103 and 104 fixing the condensate trap to the base of the cabinet iii Disconnect the condense line from the projection of the condensate trap from the base of the cabinet iv Wit...

Страница 55: ...he EV bracket Fig 6 7 4 item 39 from the cabinet frame vii Remove the expansion vessel viii Reassemble Section 8 3 NB When reassembling inspect the gasket for damage and replace if necessary WD420 3 2...

Страница 56: ...Burner Kit 81 Burner Gasket 72 Ignitor Gasket 53 Ignitor Kit 58 Flow Return Thermistors 59 Flue Thermistor 57 Flow Overheat Thermostat 101 Pressure Sensor WD420 3 2007 Chapter 9 Spare Parts Listings...

Страница 57: ...Q28sP Gas Valve Mixer Assem 132 Control Panel 131 Q28s Control PCB Q28sP Con PCB 60 Pump 98 Expansion Vessel WD420 3 2007 Chapter 9 Spare Parts Listings The Keston Qudos 28s Qudos 28sP Boilers Instal...

Страница 58: ...59 Flue Thermistor 57 Flow Thermostat 101 Pressure Sensor 111 Fan 183 Gas Valve Mixer Air Gas Assembly NG Q28s 183 Gas Valve Mixer Air Gas Assembly LPG Q28sP 132 Control Panel 131 Control PCB NG Q28s...

Страница 59: ...E MEASURE RECORD GAS RATE m3 hr ft3 hr BURNER OPERATING PRESSURE IF APPLICABLE N A mbar CENTRAL HEATING FLOW TEMPERATURE O C CENTRAL HEATING RETURN TEMPERATURE O C FOR COMBINATION BOILERS ONLY HAS A W...

Страница 60: ...GNATURE SERVICE 1 DATE ENGINEER NAME COMPANY NAME TEL No CORGI ID CARD SERIAL No COMMENTS SIGNATURE SERVICE 3 DATE ENGINEER NAME COMPANY NAME TEL No CORGI ID CARD SERIAL No COMMENTS SIGNATURE SERVICE...

Страница 61: ...conditions Make sure that the exhaust pipe terminates away from windows or vents and is out of reach Make sure that the air inlet and exhaust pipe outlets are at least 200mm apart Check tightness of a...

Страница 62: ...00 0 with the LPG gas valve venturi assembly part number Q 10S 3 05 00 0 according to section 8 4 8 v Check the gas rate and combustion MANDATORY Although the gas pressure is preset at the factory it...

Страница 63: ...produce a CO2 reading of 10 3 10 7 with a corresponding CO level of 50 150 ppm 4 Press the RESET button once and then press the ENTER button Use the button until the display shows 32 30 for LPG Press...

Страница 64: ...0 with the NG gas valve venturi assembly part number Q 10S 3 04 00 0 according to section 8 4 8 v Check the gas rate and combustion MANDATORY Although the gas pressure is preset at the factory it is r...

Страница 65: ...t if necessary the adjustment screw pos 4 to produce a CO2 reading of 8 9 9 3 with a corresponding CO level of 50 150 ppm 4 Press the RESET button once and then press the ENTER button Use the button u...

Страница 66: ...s Carbon dioxide and carbon monoxide are colorless odorless gases produced by all combustion processes When the Keston condensing boiler is operating properly carbon dioxide CO2 levels will be between...

Страница 67: ...will be locked on at Minimum rate If no further buttons are pressed for 10 minutes the boiler will automatically revert to normal operation 5 Measure the CO2 reading in the flue gases The CO2 reading...

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