Installation & Servicing Instructions Baxi Platinum Combi HE Range Gas Fired Wall Mounted Condensing Combination Boiler Please leave these instructions with the user
Natural Gas Baxi Platinum Combi 24 HE G.C.No 47 075 20 Baxi Platinum Combi 28 HE G.C.No 47 075 21 Baxi Platinum Combi 33 HE G.C.No 47 075 22 Building Regulations and the Benchmark Commissioning Checklist Building Regulations (England & Wales) require notification of the installation of a heating appliance to the relevant Local Authority Building Control Department.
Installer Notification Guidelines Install and Commission this appliance to manufacturer's instructions Complete the Benchmark Checklist Choose Building Regulations Notification Route Competent Person's Self Certification Scheme If you notify via CORGI Scheme, CORGI will then notify the relevant Local Authority Building Control Scheme on member's behalf Building Control Contact your relevant Local Authority Building Control (LABC) who will arrange an inspection or contact a government approved inspect
Legislation IMPORTANT - Installation, Commissioning, Service & Repair This appliance must be installed in accordance with the manufacturer’s instructions and the regulations in force. Read the instructions fully before installing or using the appliance. In GB, this must be carried out by a competent person as stated in the Gas Safety (Installation & Use) Regulations.
CONTENTS Section Page 1.0 Introduction 6 2.0 General Layout 7 3.0 Appliance Operation 8 4.0 Technical Data 9 5.0 Dimensions and Fixings 12 6.0 System Details 13 7.0 Site Requirements 16 8.0 Installation 22 9.0 Commissioning 28 10.0 Completion 31 11.0 Servicing 32 12.0 Changing Components 34 13.0 Combustion Check 43 14.0 Electrical 44 15.0 Short Parts List 45 16.0 Fault Finding 46 17.
1.0 Introduction 1.1 Description 1. The Baxi Platinum Combi HE is a fully automatic gas fired wall mounted condensing combination boiler. It is room sealed and fan assisted, and will serve central heating and mains fed domestic hot water. Case Front Panel 2. The boiler is set to give a maximum output of :24 models - 24 kW DHW 25.9 kW CH (Condensing) 28 models - 28 kW DHW 25.9 kW CH (Condensing) 33 models - 33 kW DHW 30.3 kW CH (Condensing) 3. It is designed for use on Natural Gas (G20). 4.
2.0 General Layout 2.1 Layout 23 1 15 22 14 13 21 16 20 10 9 8 7 12 2 1. Expansion Vessel 2. Automatic Air Vent 3. DHW Plate Heat Exchanger 4. Circulation Pump 5. Drain Off Point 6. Pressure Relief Valve 7. Integral Timer Position 8. Central Heating System Pressure Gauge 9. PCB 10. Control Box 11. 3-Way Valve Assembly 12. Condensate Trap 13. Flame Sensing Electrode 14. Spark Electrode 15. Primary Heat Exchanger 16. Fan Assembly 17.
3.0 Appliance Operation 1 3.1 Central Heating Circuit Central Heating Mode (Fig. 2) 1. With a demand for heating, the pump circulates water through the primary circuit. 2 3 4 7 26 20 5 6 25 24 18 2. Once main burner ignites the fan speed controls the gas rate to maintain the heating temperature measured by the temperature sensor. 3. When the flow temperature exceeds the setting temperature, a 3 minute delay occurs before the burner relights automatically (anti-cycling).
4.0 Technical Data 4.1 Appliance Type C13 Appliance Category C33 CAT I 2H Power Consumption 155W Electrical Protection IPX0D Central Heating Primary Circuit Pressures Safety Discharge Max Operating Min Operating Recommended Operating Range Heat Input CH (Net) kW Max Min 24.7 7 F2L Max Min 27.4 7.8 Heat Output CH (Non-Condensing) Max Min kW 24 6.8 Heat Output CH (Condensing) Max Min kW 25.9 7.4 Heat Input DHW (Net) Max kW 24.7 Heat Input DHW (Gross) Max kW 27.
4.0 Technical Data 4.2 Appliance Type C13 Appliance Category C33 CAT I 2H Power Consumption 155W Electrical Protection IPX0D Central Heating Primary Circuit Pressures Safety Discharge Max Operating Min Operating Recommended Operating Range Heat Input CH (Net) kW Max Min 24.7 9 F2L Max Min 27.4 10 Heat Output CH (Non-Condensing) Max Min kW 24 8.7 Heat Output CH (Condensing) Max Min kW 25.9 9.5 Heat Input DHW (Net) Max kW 28.9 Heat Input DHW (Gross) Max kW 32.
4.0 Technical Data 4.3 Appliance Type C13 Appliance Category C33 CAT I 2H Power Consumption 160W Electrical Protection IPX0D Central Heating Primary Circuit Pressures Safety Discharge Max Operating Min Operating Recommended Operating Range Heat Input CH (Net) kW Max Min 28.9 9.7 F2L Max Min 32.1 10.8 Heat Output CH (Non-Condensing) Max Min kW 28 9.4 Heat Output CH (Condensing) Max Min kW 30.3 10.2 Heat Input DHW (Net) Max kW 34 Heat Input DHW (Gross) Max kW 37.
5.0 Dimensions and Fixings Dimensions 3o A 780mm E G B 345mm C 450mm A D 116mm Ø Min. E 185mm F 145mm G 131mm H 180mm B 360° Orientation H D C Tube Ø 100mm F Tap Rail 32.
6.0 System Details 6.1 Information 1. The Baxi Platinum Combi HE Condensing Combination Boiler is a ‘Water Byelaws Scheme - Approved Product’. To comply with the Water Byelaws your attention is drawn to the following installation requirements and notes (IRN). a) IRN 001 See text of entry for installation requirements and notes. b) IRN 302 Byelaw 14. 2. Reference to the WRc publications, ‘Water fittings and materials directory’ and ‘Water supply byelaws guide’ give full details of byelaws and the IRNs. 6.
6.0 System Details 6.5 System Filling and Pressurising 1. A filling point connection on the central heating return pipework must be provided to facilitate initial filling and pressurising and also any subsequent water loss replacement/refilling. Stop Valve Double Check Valve DHW Mains Inlet Fig. 4 Temporary Hose 2. There are connection points on the mains cold water inlet and central heating return isolating taps (Fig. 5) to which the filling loop kit supplied can be assembled.
6.0 System Details 6.8 Domestic Hot Water Circuit (Fig. 7) 1. All DHW circuits, connections, fittings, etc. should be fully in accordance with relevant standards and water supply regulations. Other Tap Outlets Expansion Vessel Boiler 3. A single check valve must be fitted as shown in Fig. 7 to prevent backflow to the supply pipe and to ensure the efficient operation of the expansion vessel which is required to accommodate the thermal expansion of the water.
7.0 Site Requirements 450mm 5mm Min 5mm Min 7.1 200mm Min Location 1. The boiler may be fitted to any suitable wall with the flue passing through an outside wall or roof and discharging to atmosphere in a position permitting satisfactory removal of combustion products and providing an adequate air supply. The boiler should be fitted within the building unless otherwise protected by a suitable enclosure i.e. garage or outhouse. (The boiler may be fitted inside a cupboard-see Section 7.3). 2.
7.0 Site Requirement 7.3 Ventilation of Compartments 1. Where the appliance is installed in a cupboard or compartment, no air vents are required. 2. BS 5440: Part 2 refers to room sealed appliances installed in compartments. The appliance will run sufficiently cool without ventilation. 7.4 Gas Supply 1. The gas installation should be in accordance with the relevant standards. In GB this is BS 6891. In IE this is the current edition of I.S. 813 “Domestic Gas Installations”. 2.
7.0 Site Requirements Termination to an internal soil and vent pipe Boiler 50mm per me 2.5° M inimum tre of pipe ru 7.6 Condensate Drain FAILURE TO INSTALL THE CONDENSATE DISCHARGE PIPEWORK CORRECTLY WILL AFFECT THE RELIABLE OPERATION OF THE BOILER The condensate discharge pipe MUST NOT RISE at any point along its length. There MUST be a fall of AT LEAST 2.5° (50mm per metre) along the entire run. n fall 1. The condensate outlet will accept 21.
7.0 Site Requirements 7.7 Flue NOTE: Due to the nature of the boiler a plume of water vapour will be discharged from the flue. This should be taken into account when siting the flue terminal. 1. The following guidelines indicate the general requirements for siting balanced flue terminals. For GB recommendations are given in BS 5440 Pt 1. For IE recommendations are given in the current edition of I.S. 813 “Domestic Gas Installations”. 2.
7.0 Site Requirements 7.8 Flue Dimensions The standard horizontal flue kit allows for flue lengths between 100mm and 685mm from elbow to terminal (Fig. 13). m 5m 68 The maximum permissible equivalent flue length is: 10 metres m 0m 10 7.9 Flue Trim 1. The rubber flue trim supplied may be fitted to either the outside wall or on the inner wall of installation. Fig. 13 7.10 Terminal Guard (Fig. 14) 1.
7.0 Site Requirements 7.11 Flue Options 1. The Baxi Platinum Combi HE can be fitted with flue systems as illustrated. B A 2. The standard flue is suitable only for horizontal termination applications. 12 11 10 1 9 2 8 3 4 7 5 AM 12 11 10 PM 9 5 1 2 0 8 4 7 3 7 8 4 3 9 1 12 11 10 3 5 PM 2 5 AM GRASSLIN 2 0 7 4 8 1 3 GRASSLIN 9 2 4 1 2 12 11 10 3 0 1 bar 4 3.
8.0 Installation 8.1 Initial Preparation The gas supply, gas type and pressure must be checked for suitability before connection (see Section 7.4). 145mm 1. After considering the site requirements (see Section 7.0) position the fixing template on the wall ensuring it is level both horizontally and vertically. 2. Mark the position of the two most suitable fixing slots for the wall plate and boiler lower fixing holes. It is preferable to use the horizontal fixing slots. 3.
8.0 Installation 8.4 Fitting the Filling Loop 1. The filling loop supplied with the boiler can be connected to the taps on the wall plate at this point. 2. The filling loop is to be connected between the mains cold water inlet and central heating return isolation taps. 3. The loop and valves must be connected as shown in the diagram (Fig. 17a). Double Check Valve & Stop Valve Cold Inlet 4. The two flanged copper elbows supplied are of different lengths (Fig. 17b).
Wall Plate 8.0 Installation 8.5 Fitting The Boiler 1. Remove the sealing caps from the boiler connections. 2. Lift the boiler using the lower edges. Engage the slots at the top rear of the boiler on the wall plate (Fig. 18). 3. Insert the sealing washers between the valves and pipes on the wall plate and the boiler connections. The rubber washers must be used on the gas connection. 4. Tighten all the connections. 8.6 Fitting the Pressure Relief Discharge Pipe (Fig. 19) 1.
8.0 Installation 8.8 Fitting The Flue HORIZONTAL FLUE 1. The standard flue is suitable for lengths between 100mm minimum and 685mm maximum, as measured from the edge of the flue elbow outlet to the joint between the terminal and air duct (Fig. 20). m 5m 68 m 0m 10 2. Locate the flue elbow on the adaptor at the top of the boiler. Set the elbow to the required orientation (Fig. 21). NOTE: The flue elbow is angled at 93 degrees to ensure a fall back to the boiler. 3.
8.0 Installation 8.8 Waste Y Fitting the Flue (Cont) 5. Mark dimension ‘Y’ on the flue as shown (Fig. 23). Carefully cut the waste material from the flue, ensuring that the ducts are square and free from burrs. 6. The inner flue duct support bracket may be in the waste portion of the flue. In this case retrieve the bracket before discarding the waste. Flue Fig. 23 7. Take the inner flue support bracket (if not already fitted) and engage it over the flue duct.
8.0 Installation 8.9 Making The Electrical Connections To connect the mains input cable proceed as follows:1. Slacken the facia panel securing screws and lift the outercase panel so that its securing tabs are clear of the facia. Remove the panel. 2. Completely undo the screws securing the facia panel and hinge it down (Fig. 26). Control Box Cover 3. Remove the control box cover securing screws. Disengage the barbs on the control box from the cover. Remove the cover (Fig. 27). Fig. 27 4.
9.0 Commissioning 9.1 Commissioning the Boiler 1. Reference should be made to BS 5449 Section 5 when commissioning the boiler. Screw 2. Open the mains water supply to the boiler. 3. Open all hot water taps to purge the DHW system. Automatic Air Vent 4. Ensure that the filling loop is connected and open, then open the heating flow and return valves on the boiler. 5. Open the screw on the automatic air vent (Fig. 30). 6. The system must be flushed in accordance with BS 7593 (see Section 6.
9.0 Commissioning 9.2 Setting the Timer 10 The Electro-Mechanical Timer allows the central heating system to be set every 15 minutes. Using the three position switch the timer will allow either constant operation, timed operation or central heating off. 9 Time Pointer 8 Move the switch button by sliding to the desired position. Constant 7 Three position switch (Fig. 32a) Timed Constant (Top position): The heating will be on constantly irrespective of the position of the tappets.
9.0 Commissioning 9.3 x2 Checking 1. The gas valve is factory set and the burner pressure cannot be measured as it is altered by suction of the fan and modulates as demand on the boiler alters. The gas supply pressure should be 20mb. 2. If necessary the gas rate may be checked after running the boiler for 10 minutes with any other appliances and pilot lights turned off. Central Heating Temperature Control Fig. 33 3.
10.0 Completion 10.1 Case Front Panel Completion 1. Instruct the user in the operation of the boiler and system including the integral timer, explaining the operational sequence. 2. Set the central heating and hot water temperature control knobs to the requirements of the user. 3. Carefully read and complete all sections of the Benchmark Commissioning Checklist at the rear of this publication that are relevant to the appliance and installation.
11.0 Servicing 11 .1 Case Front Panel Annual Servicing 1. For reasons of safety and economy, it is recommended that the boiler is serviced annually. Servicing must be performed by a competent person. If a combustion analyser is available the CO2 can be checked and adjusted - see Section 13.0. 2. After servicing, complete the relevant Service Interval Record section of the Benchmark Commissioning Checklist at the rear of this publication. 3. Ensure that the boiler is cool. 4.
11.0 Servicing 11.1 Burner Annual Servicing (Cont) Viewing Window 7. Undo the nut on the gas inlet pipe to the venturi (Fig. 42) and pull the sensing pipe off the fan. 7.5 ± 1 8. Disconnect the electrode leads, noting their position, and the fan electrical plugs (Fig. 43). 4 ± 0.5 9. Undo the four nuts retaining the combustion box cover to the heat exchanger. Electrode Position 10.
12.0 Changing Components Bracket Igniter Igniter Feed Plug IMPORTANT: When changing components ensure that both the gas and electrical supplies to the boiler are isolated before any work is started. When the component has been changed turn the selector switch fully anticlockwise against the spring pressure to the reset position and hold for 5 seconds to reset the boiler before recommissioning. See Section 11.1 “Annual Servicing” for removal of case panel, door etc. 12.1 ElectrodeL eads Igniter (Fig.
12.0 Changing Components 12.3 Fan (Fig. 48) 1. Undo the nut on the gas inlet pipe to the venturi (Fig. 49) and pull the sensing pipe off the fan. 2. Disconnect the electrode leads, noting their position and disconnect the fan electrical plugs. 3. Undo the screws securing the collector to the extension piece. 4. Remove the collector and fan assembly, being careful to retain the injector in the venturi. 5. Undo the screws securing the fan to the venturi and fit the new fan, replacing the seal if necessary.
12.0 Changing Components Cover 12.6 Burner Burner (Fig. 51) 1. Undo the screws securing the collector to the venturi and extension piece. Remove this extension piece from the cover (on 24 and 28 models). Gasket Extension Piece (Not on 33 model) 2. Withdraw the burner from the cover and replace with the new one. 3. Examine the gasket, replacing if necessary. 4. Reassemble in reverse order. Venturi 12.7 Insulation (Fig. 52) 1. Remove the electrode leads, noting their positions.
12.0 Changing Components 12.8 Electrical Plug Flue/Heat Exchanger Thermostat Sensor Flue/Heat Exchanger Thermostat Sensor (Fig. 53) 1. Ease the retaining tab on the sensor away and disconnect the electrical plug. 2. Turn the sensor 90o anticlockwise to remove - it is a bayonet connection. 3. Reassemble in reverse order. 12.9 Fig. 53 Water Pressure Sensor (Fig. 54) 1. Drain the primary circuit. 2. Disconnect the two wires from the sensor. 3.
12.0 Changing Components 12.13 Pump - Head Only (Fig. 56) 1. Drain the primary circuit and remove the socket head screws securing the pump head to the body and draw the head away. 2. Undo the screw on the pump wiring cover and remove the cover. Using a suitable flat bladed screw driver press the cable securing levers downwards to release each wire after noting their position. 3. A standard replacement Grundfos 15-60 head can now be fitted. Connect the pump wiring to the new head.
12.0 Changing Components 12.16 Gauge Retaining Bracket Pressure Gauge (Figs. 59 & 60) 1. Drain the primary circuit and undo the nut on the pressure gauge capillary. 2. Undo the screws securing the gauge retaining bracket. Pressure Gauge Fig. 60 3. Remove the bracket and gauge assembly. Depress the barbs on the side of the gauge and remove the retaining bracket. 4. Examine the sealing washer, replace if necessary. 5. Reassemble in reverse order. 12.17 Hall Effect Sensor (Fig. 61) 1.
12.0 Changing Components 12.19 Plate Heat Exchanger (Fig. 63) 1. Drain the primary circuit and remove the gas valve as described in section 12.23. Plate Heat Exchanger 2. While supporting the heat exchanger undo the screws securing it to the brass manifolds. 3. Withdraw the heat exchanger upwards, taking care not to damage any wires or controls. Seals 4. There are four rubber seals between the manifolds and heat exchanger which may need replacement. LH Location Stud Fig. 63 5.
12.0 Changing Components 12.21 P.C.B. (Fig. 67) 1. Note the settings of the temperature control knobs, rotate them fully anticlockwise and carefully pull them off the drive pins. 2. Completely undo the screws securing the control box cover and release the cover retaining barbs from their slots. Disengage the rear of the cover from the control box hinge pin (Fig. 65). 3. Note the position of all plugs and wires on the P.C.B. and disconnect them. 4. Undo the securing screws and remove the P.C.B.
12.0 Changing Components 12.23 Venturi Inlet Pipe Outlet Adaptor Gas Valve (Fig. 68) 1. Turn the gas cock off and undo the nut on the gas feed elbow under the boiler. 2. Remove the screws securing the inlet pipe flange to the boiler bottom panel. 3. Pull off the earth lead and sensing pipe. Gas Valve Sensing Pipe 4. Undo the nut on the venturi inlet pipe and slacken the nut on the venturi. Ease the pipe aside and remove the gas valve. 5.
13.0 Combustion Check x2 13.1 Checking the CO2 1. The combustion (CO2) may be checked using a suitably calibrated analyser after running the boiler for several minutes. 2. To do this it is necessary to set the boiler to ‘Calibration Mode’. Central Heating Temperature Control 3. Ensure that all external controls are calling for heat. The actual current boiler temperature is shown on the display. Domestic Hot Water Temperature Control Fig. 70 4.
14.0 Electrical 14.
15.0 Short Parts List Short Parts List Key No. Description Manufacturers Part No. 426 306 315 G.C. No.
16.0 Fault Finding 16.1 NOTE: When instructed to turn the selector to the reset position turn the selector switch fully anticlockwise against the spring pressure to the reset position and hold for 5 seconds to reset the boiler. Initial Fault Finding Checks 1. Check that gas, water and electrical supplies are available at the boiler. 2. Electrical supply = 230V ~ 50 Hz. 3. CH water system pressurised to 0.5 bar minimum when the boiler is cold. 4. The preferred minimum gas pressure is 20 mbar. 5.
16.0 Fault Finding Refer to Section 14.0 “Illustrated Wiring Diagram” for position of terminals and components Central Heating - Follow operational sequence Turn selector switch to The display illuminates NO Go to section ‘A’ YES Error 110 flashing Error 130 flashing Error 133 flashing YES Turn the selector switch to reset position for 5 seconds YES If the error 110 is still flashing.
16.0 Fault Finding Domestic Hot Water - Follow operational sequence Turn selector switch to The display illuminates NO Go to section ‘A’ YES Error 110 flashing Error 133 flashing YES Turn the selector switch to reset position for 5 seconds YES If the error 110 is still flashing. Go to section ‘J’ NO YES Error 20, 28 or 50 flashing Go to section ‘E’ NO YES Error 119 flashing Go to section ‘C’ Go to section ‘B’ NO Turn Domestic Hot Water thermostat to Maximum. Open DHW tap fully.
16.0 Fault Finding Fault Finding Solutions Sections A Is there 230V at: 1. Main terminals L and N 2. Main terminal fuse 3. B NO Check electrical supply NO Replace fuse NO Check wiring PCB - X1 connector terminals 1,2 NO Display illuminated Replace PCB Is there 230V at: YES 1. Pump 2. PCB - X3 connector terminals 3 & 4 NO If pump jammed, release NO Replace pump Replace PCB YES Change pump supply cable C 1. YES CH system pressure less than 0.5 bar NO 2. D 1.
16.0 Fault Finding E F Temperature sensors faulty. Cold resistance approximately 10kΩ @ 25° C (DHW and CH sensors) 20kΩ @ 25° C (Flue sensor) (resistance reduces with increase in temp.) 1. 2. NO Replace sensor Check and correct the connection of the tube between the venturi and gas valve Gas at burner NO Ensure gas is on and purged PCB - X3 connector is 230V AC across terminals 1 & 2 YES Replace gas valve NO Replace PCB G 1. Ensure that the Hall Effect Sensor is in position.
16.0 Fault Finding I 1. 2. Check the gas supply pressure: For Natural Gas greater than 10 - 11 mbar Check and correct if necessary 1. The mechanical set of the gas valve (CO2 values - see instruction) 2. Flame sensing electrode and lead connections 3. Flame sensing electrode position YES Flame current should be more than 0.5 μA J 1. Overheat thermostat operated or faulty, i.e. continuity across thermostat terminals NO NO Replace PCB Replace flame sensing electrode Allow to cool.
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BENCHMARK No. 5 1 1 6 2 8 0 1.0 Introduction GAS BOILER COMMISSIONING CHECKLIST COLLECTIVE MARK BOILER SERIAL No. NOTIFICATION No.
SERVICE INTERVAL RECORD It is recommended that your heating system is serviced regularly and that you complete the appropriate Service Interval Record Below. Service Provider. Before completing the appropriate Service Interval Record below, please ensure you have carried out the service as described in the boiler manufacturer’s instructions. Always use the manufacturer’s specified spare part when replacing all controls SERVICE 1 DATE SERVICE 2 DATE ENGINEER NAME COMPANY NAME TEL No.
924.355.1 B a x i H e a ting UK Limited Brownedge Road Bamber Bridge Preston Lancashire PR5 6UP After Sales Service 08700 60 30 60 Technical Enquiries 08706 049 049 Website www.baxi.co.
