Flexicom cx combination boiler - installation and service manual

More documents

Recommendations

Info

5 Water System - Heating5.1 GeneralThis boiler is designed for use as part of a sealed watercentral heating system with fully pumped circulation. Thepump, expansion vessel and associated safety devices are allfitted within the boiler.128005.2 Safety ValveThe safety valve is an integral part of the boiler and it cannotbe adjusted.The pipe from the safety discharge valve mustnot discharge above an entrance, window or any type ofpublic access area.5.3 Expansion VesselThe boiler has an integral expansion vessel with a capacity of8 litres (1.76 gallons), with a charge pressure of 0.5bar.NOTE: The expansion vessel volume depends on the totalwater system volume and the initial system design pressure.In GB, Guidance on vessel sizing is also given in the currentissue of BS5449 and BS7074 Part 1.In IE, current edition of I.S.813 “Domestic Gas Installations”.5.4 Flow RateIf it is necessary to alter the flow rate, the system can befitted with a lockable balancing valve in the main flow orreturn pipes shown as valve “A” in diagram 5.1. The flow ratethrough the boiler must not be allowed to fall below that givenin section 1 - Specification Table.5.5 BypassThe boiler is fitted with an automatic bypass, see diagram 5.2.Diagram 5.3 shows the pump head remaining for the heatingsystem depending on the bypass setting and the speedsetting of the pump, see section 12 Commisioning.Ensure that under no circumstances does the flow rate dropbelow the figure specified, refer to section 1 - SpecificationTable and section 12.6.5.6 Filling the Sealed SystemThe boiler is supplied with a filling device, see diagram 5.4.This filling device is designed to enable the filling andpressurisation of the system in the event of loss of pressure.NOTE: The water pressure at the boiler must be at least1.2bar to enable filling the boiler to a minimum pressure. Ifnot pressurisation must be carried out by an alternative fillingloop.Suitable external filling systems are shown diagramatically,see diagram 5.5. The system should be pressurised to 1bar,indicated on the digital display with no heating demand.5.7 Draining PointsDraining taps must be provided at all low points of the system,which will allow the entire system to be drained.Draining taps shall be to the current issue of BS2879.Drain points for the appliance are provided at the positionsshown in diagram 5.4.5.8 Water TreatmentDiagram 5.1Existing system- It is ESSENTIAL that prior to installing thenew boiler the system is thoroughly flushed.New system- For optimum performance after installation, theboiler and its associated central heating system should alsobe flushed.Flushing should be carried out in accordance with BS7593:2006 using a cleanser such as Sentinel X300 or X400, FernoxRestorer or Salamander corrosion guard cleaner.IMPORTANT: Ensure all cleanser is removed from the wholesystem before adding an inhibitor.For long-term corrosion protection, after flushing, an inhibitorsuitable for stainless steel exchangers should be used, referto the current issue of BS 5449 and BS 7593 on the use ofinhibitors in central heating systems. Examples are SentinelX100 Fernox Protector or Salamander corrosion guardinhibitor.12
5 Water System - Heating1392513072Diagram 5.2Diagram 5.413102Diagram 5.313
Page 2 and 3: Guarantee RegistrationThank you for
Page 4 and 5: WARNINGSGas Leak or FaultTurn off t
Page 6 and 7: Boiler DesignThese boilers are desi
Page 8 and 9: 2 Boiler Dimensions and Hydraulic S
Page 10 and 11: 4 Flue Options and Terminal Clearan
Page 14 and 15: 5 Water System - Domestic Hot Water
Page 16 and 17: 6 Installation Preparation6.1 Appli
Page 18 and 19: 8 Boiler Fixing8.1 Boiler HangingIM
Page 20 and 21: 9 Safety Discharge Valve and Conden
Page 22 and 23: 10 Telescopic Flue - Length, Prepar
Page 24: 10 Telescopic Flue - Length, Prepar
Page 29 and 30: 10 Direct Rear Flue - Length, Prepa
Page 31 and 32: 10 Vertical - Flue Length, Preparat
Page 33 and 34: 10 Twin Flue - Length, Preparation
Page 35 and 36: 10 Twin Flue - Length, Preparation
Page 37 and 38: 11 Electrical ConnectionWARNING: Th
Page 39 and 40: 12 Commissioning5. Open the two fil
Page 41 and 42: 12 CommissioningGas RateMake sure t
Page 43 and 44: 13 Servicing● Rotate the “throt
Page 45 and 46: 13 ServicingSECURINGSCREW (3)14079E
Page 47 and 48: 14 Fault Finding14.1 Preliminary fa
Page 49 and 50: 14 Fault FindingCENTRAL HEATING1301
Page 51 and 52: 14 Fault FindingState list - To acc
Page 53 and 54: 15 Replacement of Parts15.1 General
Page 55 and 56: 15 Replacement of Parts15.12 Silenc
Page 57 and 58: 15 Replacement of Parts15.23 Flow S
Page 59 and 60: 15 Replacement of Parts1439914414RE
Page 61 and 62: 16 Spare Parts16.1 Spare PartsWhen
Page 63 and 64:
18 Declaration of Conformity1450563
show all

Flexicom cx combination boiler - installation and service manual

Create successful ePaper yourself

Delete template?

Save as template?