Glow-worm Ultracom cxi User Manual Page 1

Installation and ServicingHigh EfficiencyCondensing CombinationBoilersUltracom cxi30cxiG.C. No. 47-019-0224cxiG.C. No. 47-019-0138cxiG.C. No. 47-019-03

104 Flue Options and Terminal ClearancesDiagram 4.1Top horizontal telescopic ue (Ø60/100) Part No. A2043600 - Section 10, page 20Top horizontal sta

11HORIZONTAL FLUES A DIRECTLY BELOW AN OPENING, AIR BRICK, OPENING WINDOWS 300B ABOVE AN OPENING, AIR BRICK, OPENING WINDOWS 300C HORIZONTALLY

125 Water System - Heating5.1 GeneralThis boiler is designed for use as part of a sealed water central heating system with fully pumped circulation.

135.9 Water PressureThe minimum working pressure to obtain the maximum domestic ow is:-24cxi 1.0bar30cxi 1.0bar38cxi 2.5bar The maximum working pr

146 Installation PreparationDiagram 6.113646Base CoverplateA - Wire Retaining ClipB - Union Nut and Sealing WasherA - Central Heating x 2C - Tap and

156.1 Appliance PackPlease check the contents of packs as shown in diagram 6.1.The packs are located in the top polystyrene packing.Remove the carton

168.1 Systems ConnectionNOTE: The appliance may contain a small amount of water, place a water container beneath the boiler connections.Remove the pro

178 Gas / Water ConnectionsDiagram 8.113643

18SAFETY DISCHARGEVALVEVIEW ON UNDERSIDE OF BOILERUNION NUTAND SEALB9 Safety Discharge Valve & Condensate ConnectionsDiagram 9.113644Diagram 9.29

199 Safety Discharge Valve & Condensate ConnectionsDiagram 9.313000

2Guarantee RegistrationThank you for installing a new Glow-worm appliance in your home.Glow-worm appliances are manufactured to the very highest stand

2010.1 Flue LengthThe maximum permissible horizontal ue length is 10 metres plus the ue terminal assembly, this can be achieved by use of the acces

2114826Diagram 10.310 Telescopic Flue - Length, Preparation and InstallationDiagram 10.215418

2210.3 REAR FlueIf a wall thickness is between 203mm min. to 413mm max. then the ue can be used without extensions.With the ue elbow temporarily tt

23Diagram 10.712929Diagram 10.812977Diagram 10.91325410 Telescopic Flue - Length, Preparation and Installation10.4 SIDE FlueWith the ue elbow tempor

24Standard Horizontal Flue10.6 Flue LengthThe maximum permissible horizontal ue length is 10 metres plus the ue terminal assembly, this can be achi

25Diagram 10.111284110 Standard Flue - Length, Preparation and InstallationDiagram 10.1215418

2610.7 Standard Horizontal Flue - A2043400Refer to diagram 10.11 for kit contents.10.8 REAR Flue With the ue elbow temporarily tted, measure the dis

27Diagram 10.1612847Diagram 10.171325410 Standard Flue - Length, Preparation and Installation10.10 Flue FittingIMPORTANT:- The ue seals are sensitiv

28Diagram 10.181485110 Vertical Flue - Length, Preparation and Installation10.11 Vertical ueThe vertical ue system is available as an option where

2910 Vertical - Flue Length, Preparation and Installation14849Diagram 10.19Flue InstallationIMPORTANT:- The ue seals are sensitive to mineral oil ba

3 CONTENTS DESCRIPTION SECTION PAGE Warnings 4Important Information 4 Statutory Requirements 5Boiler Desi

30Ridge Tile TerminalA ridge tile terminal is available - part no. A2043800, see diagram 10.20.The installation of a ridge tile will be required. A su

3110 Vertical Flue - Length, Preparation and InstallationDiagram 10.2113243Diagram 10.2213242Diagram 10.2312982Completion of InstallationWith the ue

3210 Twin Flue - Length, Preparation and Installation15406Secure long flue lengths (horizontal & vertical) to walls or ceiling at every joint or

3310 Twin Flue - Length, Preparation and Installation10.12 Twin ueThe twin ue system is available as an option when the top horizontal or vertical

3410 Twin Flue - Length, Preparation and InstallationDiagram 10.2713240Boiler ConnectionIMPORTANT: The ue seals are sensitive to mineral oil based l

35 10 Plume Management Kit10.13 Plume Management KitThe Plume Management Kit: Part No. A2044100 (white) or A2044000 (black) can be used to overcome m

36WARNING: This appliance must be earthed. ● This appliance must be wired in accordance with these instructions. Any fault arising from incorrect wi

3711.2 System Controls 24V WARNING: UNDER NO CIRCUMSTANCES MUST ANY MAINS VOLTAGE BE APPLIED TO ANY OF THE TERMINALS ON THE 24V CONNECTION PLUG.Conn

3812 Commissioning13577IMPORTANT: At the time of commissioning, complete all relevant sections of the Benchmark Checklist located in the centre pages

39Commissioning should only be carried out by a competent person approved at the time by the Health and Safety Executive.12.4 Initial LightingNOTE: Th

4Gas CategoryThis boiler is for use only on G20 natural gas, but may be converted for use on G31 gas (Propane L.P.G.).Gas Safety (Installation and Use

4012 Commissioning12.6 Heating SystemEnsure that the external controls and programmer are calling for heat. Fully open all radiator valves, ow contr

41MODELG31 BURNER % CO2CHECK(case on)SETTING(case off)9.2 to 10.210.0 to 11.09.2 to 10.20.0040.0040.00410.010.59.8+ 0.0- 0.9+ 0.3- 0.7+ 0.2- 0.8Thrott

4213 ServicingGeneral Inspection Prior to, during servicing and after any maintenance or changed parts, the following must be checked.● The integrit

4313 Servicing13649Diagram 13.2Diagram 13.1154422. Minimum Rate Check and Adjustment● Now check the minimum gas rate CO2 setting: Press and release t

4413 ServicingDiagram 13.613266Diagram 13.413515Diagram 13.51351813.2 Spark ElectrodeDisconnect the spark electrode plug and earth lead, see diagram

4513555Diagram 13.713 Servicing13272Diagram 13.813.4. Combustion Chamber and Heat ExchangerRemove loose debris from inside the combustion chamber usi

4614 Fault FindingDiagram 14.11353514.1 Preliminary fault ndingThe following checks should be performed before proceeding onto specic diagnostics:•

4714 Fault Finding13166Diagram 14.4

4813012Diagram 14.5CENTRAL HEATINGDHW1301514 Fault Finding

4914 Fault Finding13860Diagram 14.6If -9OC is displayed, check that the DHW thermistor wires are unconnected and are not faulty or trapped.Fault Code

5CE MarkThis boiler meets the requirements of Statutory Instrument, No. 3083 The Boiler (Efciency) Regulations, and therefore is deemed to meet the r

5014 Fault Finding13447Diagram 14.6 continued.Fault Codes (continued)

5114 Fault FindingTo enter the diagnostic menu:a) Press and hold the ‘MODE’ button for 5 seconds. The display will change to ashing ‘0’.b) Use t

5214 Fault FindingDiagram 14.713578Indicates read and write function - all other diagnostics are read only Diagnostic Menu - Level 1 Installer Acc

5314 Fault Finding Central heating mode DescriptionS.00 no heating requiredS.01 fan pre-runS.02 pump pre-runS.03

5415 Replacement of Parts15.1 GeneralIMPORTANT: The replacement of parts described in sections 15.5 to 15.9 and section 15.12 will require the remov

5515 Replacement of Parts13238SECURING SCREWHEATEXCHANGERWASHERREAR INSULATIONDiagram 15.413277Diagram 15.313276VENTURIPLATESECURINGSCREW (3)Diagram

5615 Replacement of Parts15.10 Viewing WindowFor access, refer to section 15.1.Refer to diagram 15.5.Remove circlip.Remove steel washer.Remove glass.

5715.12 Heat ExchangerRefer to Manual Handling section.For access, refer to section 15.1.Refer to section 13.3 for removal of the fan, gas valve and b

5815.14 Heating Flow ThermistorFor access, refer to section 15.1.Refer to diagram 15.10.Remove the electrical connections from the thermistor.Remove t

5915 Replacement of Parts15.17 Pump (head only)For access, refer to section 15.1.Drain the boiler heating circuit as described in the appropriate sec

6Boiler DesignBoiler DesignThis boiler is designed for use as part of a sealed water central heating system with fully pumped circulation. The pump, e

6015 Replacement of Parts15.19 Domestic Hot Water ThermistorFor access, refer to section 15.1.Refer to diagram 15.14.Disconnect the domestic hot wate

6115 Replacement of Parts15.22 Flow SensorFor access, refer to section 15.1.Drain the boiler hot water circuit as described in the appropriate sectio

6215 Replacement of Parts15.26 Hydroblock and Bypass TubeFor access, refer to section 15.1.IMPORTANT: To replace the bypass tube and seals the LH an

6315 Replacement of PartsDiagram 15.22133131335515.27 Access User Interface and Main PCBFor access, refer to section 15.1.Remove control box retainin

6416.1 Spare PartsWhen ordering spare parts, contact Glow-worm’s own service organisation using the telephone number on the inside front cover of thi

6516 Spare PartsDiagram 16.113740

66IMPORTANT. With regards to the Manual Handling Operations, 1992 Regulations, the following lift operation exceeds the recommended weight for a one m

6718 Declaration of Conformity

www.high-efciency.info Because of our constant endeavour for improvement, details may vary slightly from those shown in these instructions.Glow-worm,

71 Boiler Specication13496

82 Boiler Dimensions & Hydraulic Schematic15421Diagram 2.2Diagram 2.12.1 Boiler Dimensions & Hydraulic SchematicAll dimensions are given in mi

93 Boiler Location, Clearances and Ventilation3.1 LocationThis boiler is not suitable for outdoor installation.This boiler may be installed in any ro