Keston Q28S Manuel d'installation

Qudos 28s User, Installation and Servicing Instructions FAN POWERED HIGH EFFICIENCY MODULATING DOMESTIC CONDENSING GAS SYSTEM BOILER CE/PI No. 86-

The boiler heat exchanger is made from highly corrosion resistant stainless steel incorrugated pipe form which provides massive surface ar

bottom of the heat exchanger where it is separated from the flue gases and exits from theboiler through the condensate drain. Any condensate formed in

firing the boiler, for 10 seconds in the event the boiler is on standby for in excess of 24hours without firing. This is to help prevent se

2.4 PHYSICAL DATA - Qudos 28s & Qudos 28sPCabinet Height mm 700Cabinet Width mm 435Cabinet Depth mm 280Top Clearance mm 150Side Clearance mm 5Base

2.6 PERFORMANCE DATA - Qudos 28s & Qudos 28sPSeasonal Efficiency (SEDBUK) = 91.1 (Qudos 28s) & 92.9 (Qudos 28sP)This value is used in the

disturbed they will not be released. Since the boards are non-serviceable parts thereshould be no risk. Under no circumstances should the

3. BOILER LOCATION3.1 DIMENSIONS AND MINIMUMCLEARANCESThe boiler must be installed in minimumclearances shown to allow subsequentservicing,

Compartment installation is permitted - such compartments must be constructed inaccordance with BS 6798.The wall on which the boiler i

BS 1363. There must be only one common method of isolation for the boiler andits control system.The appliance must be connected to the 3A supply via a

3.5 BOILER SIZE SELECTIONThe Qudos 28s will automatically adjust heat output and pump speed to match the systemrequirements at any given time. Ef

CONTENTSNB : These instructions are an integral part of the appliance. This document must be handed over tothe user on completion of the installation

g Copper tubing to BS 2871 Part 1 or barrier plastic pipe suitable to 110 oC, such asUnipipe, is recommended.h Jointing should be either with cap

m The installation must be designed to work with flow temperatures of up to 110 oC.All components of the system must be suitable for a working

If an additional pump is required the selected pump must comply with BS 1394. Provisionmust be made in the system design for control of the additional

Alternatively, where flue or air intake lengths of up to 60m are require, Keston Composite75mm flue and air pipe can be used (contact your KESTON Heat

section 3.11. Such drain points can be formed using standard muPVC fittings. Refer to theexample in Figure 3.8.3.3.8.4 TerminationsAir inlet terminals

3.8.6 Distance Between Flue Outlet & Air InletThere is no maximum - the terminations must not be on opposite sides of thedwelling bu

4. INSTALLATION OF THE BOILERRead Chapter 3 - Boiler Location and decide upon the position of the boiler.Installation of the boiler is straightforward

Put the flue spigot assembled with the test plug on the cabinet frame and secureit by fastening the two M6 screws. Couple the spigot to the internal f

4.6 WATER SYSTEMConnect the flow and return HEATING CIRCUIT system pipework to the boiler. Details ofsystem requirements are given in Chapter 3 - Sect

5.1 Twin Thermostat Operation with Weather Compensation5.2 Modulation of DHW generationWD420/3/2007 Chapter 4 : Installation The Keston Qud

5.6 Hot Flushing5.7 Combustion Testing5.8 Checking the Gas Pressure5.9 Timing The Gas Meter5.10 Handing Over To The User6 FAULT FINDING6.1 Electrical

5.3 Solar Control4.9 EXCHANGING A BOILERBefore removing an existing boiler add Fernox Supafloc, or equivalent cleaning agent, inaccordance with the

Initial FiringThe gas pressure setting is factory adjusted to within the required range and doesnot need readjustment. If the reading is incorrect th

5. COMMISSIONING OF THE BOILERImportant:This condensing boiler contains components which could be damaged or blocked by grease, dirt,solder etc., fr

“RESET” button so that the display reverts to show the actual flow temperature ofthe boiler. Once a heating demand is received the fan will start and

To measure CO2 levels in the Kestonboiler remove the 1/8" plug from theflue outlet pipe spigot (Figure 6.7.4item 17). Insert

7) Press the “RESET” button twice to return to the normal operation mode anddisplay.5.8 CHECKING THE GAS PRESSUREWith the boiler running

6. FAULT FINDING6.1 ELECTRICAL CONTROL SEQUENCEWhen the external control(s) are calling for heat, power will be fed to the boiler connectionstrip at

QUICK REFERENCE6.2 NORMAL OPERATIONThe Qudos 28s and Qudos 28sP boilers feature a user display which shows actual flowtemperature. Howev

6.3 FAULT MODESIf a situation is detected which the boiler considers may cause damage to the appliance the boilerwill enter a lockout mode and stop fu

ERROR HISTORYThe Qudos 28s has an internal memory function that stores the last six errorsencountered along with the sensor readings a

0. HANDLING INSTRUCTIONS0.1 LIST OF CONTENTSThe Keston Qudos 28s and Qudos 28sP are supplied almost totally pre-assembled. The unitsuse standard 50 mm

6.4 FUNCTIONAL FLOW WIRING DIAGRAMWD420/3/2007 Chapter 6 : Fault Finding The Keston Qudos 28s & Qudos 28sP BoilersInstallation & Servicing

6.5 ELECTRICAL WIRING DIAGRAMWD420/3/2007 Chapter 6 : Fault Finding The Keston Qudos 28s & Qudos 28sP BoilersInstallation & Servicing Instruc

6.6 ILLUSTRATED WIRING DIAGRAMWD420/3/2007 Chapter 6 : Fault Finding The Keston Qudos 28s & Qudos 28sP BoilersInstallation & Servicing Instr

6.7 Exploded Assembly Diagrams6.7.1 Boiler Controls Assembly WD420/3/2007 Chapter 6 : Fault Finding The Keston Qudos 28s & Qudos 28sP BoilersInst

6.7.2 Waterway, Condensate & Flue AssemblyWD420/3/2007 Chapter 6 : Fault Finding The Keston Qudos 28s & Qudos 28sP BoilersInstallation &

,WD420/3/2007 Chapter 6 : Fault Finding The Keston Qudos 28s & Qudos 28sP BoilersInstallation & Servicing Instructions Page : 40

6.7.3 Air  Gas AssemblyWD420/3/2007 Chapter 6 : Fault Finding The Keston Qudos 28s & Qudos 28sP BoilersInstallation & Servicing Instruction

6.7.4 Casing AssemblyWD420/3/2007 Chapter 6 : Fault Finding The Keston Qudos 28s & Qudos 28sP BoilersInstallation & Servicing Instructions Pa

6.7.5 Exploded Diagrams Parts Reference ListBoiler Controls Assembly (Fig. 6.7.1)GC Number Code Description131 Q28s Main Control PCB (Q.10S.4.01

7. ROUTINE (ANNUAL) SERVICINGTo ensure the continued safe and efficient operation of the boiler it is necessary to carry outroutine s

twisting at the waist - reposition the feet instead. Avoid upper body bending when holding theappliance and keep the boiler as close to the body as po

c. If necessary clean the burner with a mild household detergent and rinse under ahot running tap.d. If necessary, from visual inspection, clean

8. REPLACEMENT OF PARTSCONTENTS8.0 GENERAL8.1 PRECAUTIONS8.2 ACCESS8.3 REPLACEMENT PROCEDURE8.4 ELECTRICAL COMPONENTS8.4.1 CONTROL PANEL8.4.2 BOILER F

v) Remove the Control Panel by removing the four retaining screws (Fig 6.7.1,item 160).vi) Reassemble (Section 8.3)vii) Check for correct operation of

8.4.7 Combustion Blower (Fig. 6.7.3 item 111)i) Isolate the appliance (Section 8.1)ii) Gain access (Section 8.2)iii) Disconnect the connector block fr

iv) Remove the 4 nuts fixing the burner to the top of the heat exchanger (Fig 6.7.3, item120).v) Remove the spark ignition/flame detection electrode (

iv) Drain the system to below the level of the appliance.v) Disconnect the flexible hose (Fig. 6.7.2 - 2/2 item 95) from the expansion vessel.vi) Undo

9. SHORT SPARE PARTS LISTItem GC No Part Denomination Item GC No Part Denomination52 Burner Kit 81 Burner Gasket72 Ignitor Gasket 53 Ignitor K

183 Q28s Gas Valve - Mixer Assem. 119 FanQ28sP Gas Valve - Mixer Assem.132 Control Panel 131 Q28s Control PCB Q28sP Con. PCB60 Pu

SHORT SPARE PARTS LIST FOR THE KESTONCONDENSING BOILER RANGEItem GC No Part Denomination52 Burner Kit81 Burner Gasket53 Ignitor Kit72 Ignitor Gasket58

WD420/3/2007 Chapter 10 : Benchmark Checklist Final The Keston Qudos 28s & Qudos 28sP Boilers Installation & Servicing Instructio

1. USER INSTRUCTIONS1.1 INTRODUCTIONThank you for choosing this Keston Qudos 28s for your household heating. The boiler isdesigned to be

WD420/3/2007 Chapter 10 : Benchmark Checklist Final The Keston Qudos 28s & Qudos 28sP Boilers Installation & Servicing Instructio

bRead Installation Manual CarefullybEnsure that ALL dust particles, filings , plastic chips etc. areremoved from the inlet pipe.bIf the i

Normal OperationDuring normal operation the digital display will show the current boiler temperature and willshow relevant operational symb

1.4 SAFETY INFORMATIONIF YOU SUSPECT A GAS LEAK TURN OFF THE APPLIANCE IMMEDIATELY, TURN OFFTHE GAS TAP TO THE APPLIANCE (LOCATED UNDERNEATH) AND CONT

2. GENERAL INSTRUCTION2.1 DESCRIPTIONThe KESTON Qudos 28s and Qudos 28sP boilers utilize the latest in condensingtechnology to produce