Radiant RKR 24 Instruction Manual
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Radiant RKR 24 Instruction Manual

Wall mounted instantaneous combi boiler premix condensing boiler
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Wall mounted instantaneous combi boiler
CE
0694
RKR 24_28_34 - RAD - ING - MAN.INST - 1104A - DIGITECH 2 - REGNO UNITO - EXTRAHEAT
Technical specification RADIANT BRUCIATORI S.p.A. Montelabbate (PU) ITALY
Instruction Manual
Installation, operating, commissioning and maintenance instructions
premix condensing boiler
for model
RKR 24
RKR 28
RKR 34
- CBD
ENGLISH

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Summary of Contents for Radiant RKR 24

  • Page 1 Instruction Manual for model RKR 24 RKR 28 RKR 34 Wall mounted instantaneous combi boiler premix condensing boiler Installation, operating, commissioning and maintenance instructions 0694 - CBD RKR 24_28_34 - RAD - ING - MAN.INST - 1104A - DIGITECH 2 - REGNO UNITO - EXTRAHEAT Technical specification RADIANT BRUCIATORI S.p.A.

  • Page 3: Table Of Contents

    CONTENTS 1. General information 1.1 General warnings page 1.2 Product conformity 2. Technical characteristics 2.1 Technical data 2.2 Dimensions 2.3 Internal parts of the boiler 2.4 Water circuit 2.5 Circulation pump head/flow graph 2.6 Printed circuit board – Technical characteristics 2.7 Control panel 3.

  • Page 4: General Information

    GENERAL INFORMATION 1. GENERAL INFORMATION 1.1 General warnings Professionally qualified personnel in accordance with current laws and standards and in line with the manufacturer’s instructions must install the appliance. In GB, the installation must be carried out by a Gas Safe Registered Installer. To check for authorised qualified engineers please contact It must be carried out in accordance Phone Number 0800 408 5500.
  • Page 5 GENERAL INFORMATION • Only original accessories or optional extras (including electrical parts) must be used with the appliance. • Should there be a smell of gas present in the room where the appliance is installed, DO NOT attempt to activate any electric switches, telephones or any other equipment that may cause sparks.

  • Page 6: Product Conformity

    GENERAL INFORMATION 1.2 Product conformity RADIANT BRUCIATORI S.p.A. declares that all its products are manufactured to a high specification and in compliance with the relevant standards. All RADIANT boilers are CE certified and possess technical and functional characteristics that comply with the following standards: UNI EN 297 for GAS-FIRED CENTRAL HEATING BOILERS TYPE B OF NOMINAL HEAT INPUT ≤...

  • Page 7: Technical Characteristics

    TECHNICAL CHARACTERISTCS 2. TECHNICAL CHARACTERISTICS 2.1 Technical data Models RKR 24 RKR 28 RKR 34 CE Certification n° 0694BN3485 Appliance Type B23p – B33 - C13 - C33 - C43 - C53 - C63 - C83 – C93 Appliance Category...
  • Page 8 TECHNICAL CHARACTERISTCS Models RKR 24 RKR 28 RKR 34 Efficiency 100% (full load 80/60° ) 98.3 98.4 98.3 Efficiency 100% (full load 50/30° ) 106.7 106.6 Efficiency 30% (partial load) 101.1 100.1 100.7 Flue efficiency losses with burner on (50/30° C) (Pn /Pr)

  • Page 9: Dimensions

    TECHNICAL CHARACTERISTCS 2.2 Dimensions - RKR 24 – RKR 28 LEGEND HEATING RETURN Ø mm HEATING FLOW Ø mm Ø mm Ø mm COLD WATER INLET Ø mm HOT WATER OUTLET CONDENSATE DRAIN Ø mm...
  • Page 10 TECHNICAL CHARACTERISTCS RKR 34 48.5 48.5 111.5 111.5 LEGEND HEATING RETURN Ø mm HEATING FLOW Ø mm Ø mm Ø mm COLD WATER INLET Ø mm HOT WATER OUTLET CONDENSATE DRAIN Ø mm...

  • Page 11: Internal Parts Of The Boiler

    TECHNICAL CHARACTERISTCS 2.3 Internal parts of the boiler LEGEND 1. PRIMARY CONDENSING HEAT EXCHANGER 2. PREMIX BURNER UNIT (GAS MANIFOLD + BURNER) 3. CONDENSATE DRAIN PIPE 4. IONISATION ELECTRODE 5. IGNITION ELECTRODE 6. FAN 7. VENTURI 8. IGNITION TRANSFORMER 9. ELECTRONIC GAS VALVE 10.

  • Page 12: Water Circuit

    TECHNICAL CHARACTERISTCS 2.4 Water circuit LEGEND PRIMARY CONDENSING HEAT EXCHANGER PREMIX BURNER UNIT (GAS MANIFOLD+BURNER) CONDENSATE DRAIN PIPE IONISATION ELECTRODE LEGEND IGNITION ELECTRODE HEATING RETURN Ø mm VENTURI HEATING FLOW Ø mm IGNITION TRANSFORMER ELECTRONIC GAS VALVE Ø mm 3 BAR PRESSURE RELIEF VALVE - HTG CIRCUIT AUTOMATIC AIR VENT VALVE Ø...

  • Page 13: Circulation Pump Head/Flow Graph

    TECHNICAL CHARACTERISTCS 2.5 Circulation pump head/flow graph RKR 24 Flow l/h Pump head at maximum speed Pump head at second speed Pump head at minimum speed Appliance Loss RKR 28 Flow l/h Pump head at maximum speed Pump head at second speed...

  • Page 14: Printed Circuit Board - Technical Characteristics

    TECHNICAL CHARACTERISTCS ® 2.6 DIGITECH 2 printed circuit board – SM30003 Technical characteristics Adjustments possible by service personnel only • Standard (30/80° C) / reduced (25-40° C) central h eating temperature • Water hammer prevention function • Central Heating timer - (adjustable from 0 to 7,5 minutes) •...

  • Page 15: Installation

    INSTALLATION INSTRUCTIONS 3. INSTALLATION (authorised personnel) 3.1 Reference standard In GB, the installation must be carried out by a Gas Safe Registered Installer. To check for authorised It must be carried out in accordance with qualified engineers please contact Phone Number 0800 408 5500. the relevant requirements of the: Gas Safety Regulations;...

  • Page 16: Boiler Room - Installation Requirements

    INSTALLATION INSTRUCTIONS 3.2 Boiler room – Installation requirements Please refer to local and national standards in force in the Country of destination of the product. In particular the manufacturer recommends: The presence of threaded connections on the gas line, require that the room in which the appliance is installed is ventilated by means of air intakes.

  • Page 17: Installation Boiler

    INSTALLATION INSTRUCTIONS 3.4 Installing the boiler ■ The appliance must be installed exclusively on a flat vertical solid wall capable supporting weight. ■ The boiler should be fitted within the building unless otherwise protected by a suitable enclosure i.e. garage or outhouse.

  • Page 18: Water Connections

    INSTALLATION INSTRUCTIONS 3.5 Water connections In order to safeguard the heat exchanger and circulation pump, especially in case of boiler replacement, it is recommended that the system is hot-flushed to remove any impurities (especially oil and grease) from the pipes and radiators.

  • Page 19: Central Heating Circuit

    INSTALLATION INSTRUCTIONS 3.6 Central heating circuit The boiler is designed for use in a sealed central heating system in accordance with the requirements of BS 5449 and BS 6798. The system should be designed to operate with flow temperatures of up to 82° C. When designing the syst em, the pump head, expansion vessel size, mean radiator temperature, etc.

  • Page 20: Condensate Drain

    INSTALLATION INSTRUCTIONS 3.7 Condensate drain Termination to an internal soil and vent pipe Boiler FAILURE INSTALL 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°...

  • Page 21: Gas Connection

    INSTALLATION INSTRUCTIONS 3.8 Gas Connection The connection to the gas supply must be carried out by professionally qualified Gas Safe Registered personnel in accordance with relevant standards: In GB this is BS 6891. When connecting the boiler to the gas supply pipe, only use appropriate washers and gas fittings. The use of hemp, Teflon tape and similar materials is not allowed.

  • Page 22: Electrical Connections

    INSTALLATION INSTRUCTIONS 3.9 Electrical connections General warnings The connection to the mains power supply must be carried out by professionally qualified personnel, registered in accordance with current legislation. Always check to make sure that the appliance has an efficient earth system. This requirement is only satisfied if it has been properly connected to an efficient earth system installed in accordance with the requirements of current safety standards and carried out by professionally qualified personnel.
  • Page 23 INSTALLATION INSTRUCTIONS Electrical connection Connect the power supply to the terminal board inside the control panel as follows: a. Switch off the power supply at the main switch. b. Remove the front case panel of the boiler. c. Slacken the screws and remove plate A (see fig. 1). d.

  • Page 24: Flue Connections

    INSTALLATION INSTRUCTIONS 3.10 Flue connections Flue position IMPORTANT: FLUE SYSTEM SHALL INSTALLED ACCORDANCE WITH RECOMMENDATIONS CONTAINED IN BS 5440:1. The boiler MUST be installed so that the terminal is exposed to the external air. It is important that the position of the terminal allows free passage of air across it at all times. If the terminal discharges into a pathway or passageway check that combustion products will not cause nuisance and that the terminal will not obstruct the passageway.
  • Page 25 The discharge duct can be terminated directly to the outside or can be connected to a suitable plume management system. MAXIMUM FLUE LENGTH: RKR 24 - 6 m RKR 28 - 6 m RKR 34 - 3 m The maximum flue length (linear equivalent) is obtained by totalling the length of linear pipe and the equivalent lengths of each bend fitted.
  • Page 26 The discharge duct can be terminated directly to the outside or can be connected to a suitable plume management system. MAXIMUM FLUE LENGTH: RKR 24 - 12 m RKR 28 - 10 m RKR 34 - 8 m The maximum flue length (linear equivalent) is obtained by totalling the length of linear pipe and the equivalent lengths of each bend fitted.
  • Page 27 INSTALLATION INSTRUCTIONS Twin Flue System- Type H Horizontal twin pipe flue kit Ø80/80 in polypropylene adjustable through 360° . The dual pipe system discharges exhaust fumes and draws air from atmosphere in two separate ducts. Horizontal twin pipe flue kit Ø80/80 – Suitable condensing boilers...
  • Page 28 Ø80 plastic inner duct discharges the exhaust fumes. MAXIMUM FLUE LENGTH: RKR 24 - 12 m RKR 28 - 10 m RKR 34 - 8 m The maximum flue length (linear equivalent) is obtained by totalling the length of linear pipe and the equivalent lengths of each bend fitted.
  • Page 29 Ø60 plastic inner duct discharges the exhaust fumes. MAXIMUM FLUE LENGTH: RKR 24 - 6 m RKR 28 - 6 m RKR 34 - 3 m The maximum flue length (linear equivalent) is obtained by totalling the length of linear pipe and the equivalent lengths of each bend fitted.

  • Page 30: Commissioning The Appliance (Authorised Personnel)

    INSTALLATION INSTRUCTIONS 4. COMMISSIONING THE APPLIANCE 4.1 General warnings The following operations must be carried out by professionally qualified personnel and Gas Safe Registered in accordance with current legislation. Reference should be made to BS 5449:5 “Commissioning”. The boiler leaves the factory pre-set and tested for burning either natural Gas or LPG. Nevertheless, when starting the boiler for the first time, make sure that the information on the rating plate corresponds to the type of gas being supplied to the boiler and check that the correct C02 value is present as stated in Section 4.5.

  • Page 31: Filling The System

    INSTALLATION INSTRUCTIONS 4.2 Filling the system Use only a WRAS approved filling loop for connection and filling of the primary system. AIR VENT VALVE This should be disconnected when not in use. AIR VENT VALVE PLUG Check the properties of the water supply and PUMP install the appropriate treatment devices if the mains water has a hardness rating more than...

  • Page 32: Filling The Condensate Trap

    INSTALLATION INSTRUCTIONS 4.3 Filling the condensate trap The condensation trap must be pre-filled when starting the boiler for the first time in order to Fig. 1 prevent flue gases from flowing back through the trap. The filling operation is carried out as follows (see fig.

  • Page 33: Starting Up The Boiler

    4.4 Starting up the boiler Once the system has been filled, proceed as follows: Table n° 1 RKR 24 RKR 28 RKR 34 • Check that the exhaust flue is free of Gas type obstructions and correctly connected to Methane - G20 9.18...

  • Page 34: Regulating The Appliance (Authorised Personnel)

    REGULATION INSTRUCTIONS 5. REGULATING THE APPLIANCE 5.1 Parameters table PARAMETER N° TYPE OF OPERATION PARAMETER VALUE FUNC TION 00 = 24Kw 01(default) 01 = 28Kw Selects the model of boiler 02 = 29Kw 03 = 34 Kw 04 = 50 Kw 00 = Instantaneous Selects the type of boiler 01 = Boiler with storage tank...

  • Page 35: Setting The Parameters

    REGULATION INSTRUCTIONS 5.2 Setting the parameters To modify the preset values of the parameters reported in the previous table, open the parameter settings menu as follows: 1. Place the On/Off switch in the OFF position. 2. Activate the On/Off switch while keeping P 00 buttons ‘+’...
  • Page 36 REGULATION INSTRUCTIONS PARAMETER P00 – SELECTS THE MODEL OF BOILER 6. Use buttons ‘+’ and ‘-‘ to modify the value of the parameter: 00 = 24 Kw 01 = 28 Kw (default) 02 = 29 Kw 03 = 34 Kw 04 = 50 Kw P 00 7.
  • Page 37 REGULATION INSTRUCTIONS PARAMETER P04 – HEATING OUTPUT RISING TIME 6. Use buttons ‘+’ and ‘-‘ to modify the value of the parameter: 00 = 0 seconds 01 = 50 seconds (default) 02 = 100 seconds 03 = 200 seconds 04 = 400 seconds P 04 7.
  • Page 38 REGULATION INSTRUCTIONS PARAMETER P07 – CENTRAL HEATING TIMER 6. Use buttons ‘+’ and ‘-‘ to modify the value of the parameter within the prescribed limits: 00 = 0 x 5” = 0” 90 = 90 x 5” = 450” (7,5 min) The default value is 36 = 180”...
  • Page 39 REGULATION INSTRUCTIONS PARAMETER P10 – MINIMUM FAN SPEED SETTING 6. Use buttons ‘+’ and ‘-’ to modify the value of the parameter between: min = 33 Hz ; max = 133 Hz. The default value is adjusted according to the output set in parameter P00.
  • Page 40 REGULATION INSTRUCTIONS PARAMETER P14 – IGNITION SEQUENCE SETTING 6. Use buttons ‘+’ and ‘-’ to modify the value of the parameter between: min = 33 Hz; max = 203 Hz. The default value is adjusted according to the output set in parameter P00.

  • Page 41: Gas Data

    REGULATION INSTRUCTIONS 5.3 Gas data Technical data tables – RKR 24 Values Gas type Natural gas - G20 Liquid Butan Gas - G 30 11.1 Liquid Propane Gas - G 31 10.1 Frequency Maximum Central Gas type Minimum (Hz) Maximum D.H.W.(Hz)
  • Page 42 REGULATION INSTRUCTIONS Technical data tables - RKR 28 Values Gas type Natural gas - G20 Liquid Butan Gas - G 30 10.9 Liquid Propane Gas - G 31 10.96 Frequency Gas type Minimum (Hz) Maximum Central Heating (Hz) Maximum D.H.W. (Hz) G 20 G 30 G 31...
  • Page 43 REGULATION INSTRUCTIONS Technical data tables – RKR 34 Table no.1 - CO Values Gas type Natural gas - G20 9.18 Liquid Butan Gas - G 30 10.3 Liquid Propane Gas - G 31 10.3 Table no.2 - Frequency Gas type Minimum (Hz) Maximum (Hz) Natural gas - G20...

  • Page 44: Converting The Boiler To A Different Gas Type

    REGULATION INSTRUCTIONS 5.4 Converting the boiler to a different gas type All maintenance operations must be carried out by professionally qualified and Gas Safe Registered personnel and the BENCHMARK Annual Service Record completed. Check that the gas supply pipe is suitable for the new fuel type. Conversion is performed as follows: •...

  • Page 45: Annual Service And Maintenance (Authorised Personnel)

    MAINTENANCE INSTRUCTIONS 6. Annual Service and Maintenance 6.1 General Warnings All maintenance operations must be carried out by professionally qualified and Gas Safe Registered personnel and the BENCHMARK Annual Service Record completed. The frequency of boiler maintenance must comply with current law and, nevertheless, should be carried out once a year.

  • Page 46: Accessing The Boiler

    MAINTENANCE INSTRUCTIONS 6.3 Accessing the boiler All maintenance operations require one or more of the boiler casing panels to be removed. The side panels can only be removed after the front panel has been removed. Front panel: Remove the fixing screws at the lower edge of the front panel.

  • Page 47: Draining The Central Heating And Domestic Hot Water System

    MAINTENANCE INSTRUCTIONS 6.4 Draining the central heating system If the need arises to drain the system, this can be done as follows: • Switch the system to “WINTER” mode and ignite the boiler. • Switch off the power supply to the boiler. •...

  • Page 48: Maintenance Operations

    MAINTENANCE INSTRUCTIONS 6.5 Maintenance operations Before carrying out any cleaning or part replacement operations, ALWAYS turn off the ELECTRICITY, WATER and GAS supplies to the boiler. Radiant Bruciatori s.p.a. will not be held responsible for damage to any of the boiler’s components caused by non-compliance with this instruction.
  • Page 49 MAINTENANCE INSTRUCTIONS Cleaning the main exchanger module and combustion unit (see fig. 1) primary heat • Disconnect the electrical connections of the exchanger electric fan. • Disconnect the joint and remove the pipe linking the gas valve to the injector unit (venturi). •...
  • Page 50 MAINTENANCE INSTRUCTIONS Cleaning the D.H.W heat exchanger (see fig. 1) • Close the shut-off valve and drain the domestic hot d.h.w heat water circuit and central heating circuit of the boiler; exchanger • Use a 4 mm Allen key to unscrew the two screws securing the heat exchanger to the multiplex unit;...
  • Page 51 MAINTENANCE INSTRUCTIONS POSITIONING THE IGNITION ELECTRODE AND THE IONISATION ELECTRODE...
  • Page 52 MAINTENANCE INSTRUCTIONS Safety thermostat (see fig. 1) • Disconnect the connecting wire; • Unscrew the fixing screws and remove the thermostat; • Replace the thermostat and re-assemble the components following the above procedure in reverse order; • Switch on the electricity, water and gas supplies and restart the appliance.
  • Page 53 MAINTENANCE INSTRUCTIONS Electric fan (see fig. 1) • Remove and dismantle the entire burner unit (see venturi 6.6.1 “Cleaning the burner unit”). • Use an 8 mm spanner to unscrew the four nuts securing the electric fan to the gas manifold and then remove the electric fan, noting the positions of the washer and diaphragm.
  • Page 54 MAINTENANCE INSTRUCTIONS Circulating pump (motor body) (see fig. 1) • Close the shut-off valves and drain the central heating circuit of the boiler; • Use a 5 mm Allen key to unscrew the four screws circulating securing the motor body to the impeller body; pump •...
  • Page 55 MAINTENANCE INSTRUCTIONS Modulation circuit board (see fig. 1-2) • Open the control panel (see 6.3 “Accessing the boiler”); • Disconnect all the connectors, remove the regulating knobs, unscrew the four fixing screws and modulation circuit board remove the modulation circuit board; •...
  • Page 56 MAINTENANCE INSTRUCTIONS Primary heat exchanger (see fig. 1) • Close the shut-off valves and drain the central heating circuit of the boiler; primary heat • Switch off the power and gas supply to the flue connection exchanger boiler; chamber • Remove and dismantle the entire burner unit (see 6.6.1 “Cleaning the condensation module and burner unit”);...

  • Page 57: Wiring Diagrams

    MAINTENANCE INSTRUCTIONS 6.6 Wiring diagrams Electrical connections PRINTED CIRCUIT BOARD DIGITECH 2 - SM30003 COD. 40-00016 EXHAUST FAN type RG128/1300-3612 light-blue brown light-blue brown IG: Main Switch TF: Thermo Fuse 102 °C TS: Safety thermostat SR: Heating sensor Heating D.H.W. SS: DHW sensor Pacq EV: Fan...
  • Page 58 MAINTENANCE INSTRUCTIONS Connecting a room thermostat or external timer/control (Option) Connect the wires to the terminal board inside the instrument panel as follows: (Example with WEEK digital weekly chronostat): a. switch off the power supply at the main switch. b. remove the front case panel of the boiler. c.
  • Page 59 MAINTENANCE INSTRUCTIONS Connecting a remote controller and the outside temperature sensor (option) Connect the wires to the terminal board inside the instrument panel as follows: a. switch off the power supply at the main Outside temperature switch. sensor (option) b. remove the front case panel of the boiler.
  • Page 60 MAINTENANCE INSTRUCTIONS Regulating the Flow temperature in accordance with the outdoor temperature The outdoor sensor has to be connected directly to circuit board SM30003. The sensor can thus be managed in one of two ways: • In case of RADIANTS remote controller + outdoor temperature sensor installation, the climatic compensation curve is set by the remote itself (see remote control installation and operating manual).

  • Page 61: Troubleshooting

    MAINTENANCE INSTRUCTIONS 6.7 Troubleshooting ERROR PROBLEM POSSIBLE CAUSE REMEDY CODE WITH NO IGNITION NO GAS. CHECK MAINS SUPPLY. IGNITION ELECTRODE BROKEN OR EARTHED. REPLACE PART. GAS VALVE MALFUNCTION REPLACE PART MECHANICAL MINIMUM ADJUSTMENT (ON GAS REGULATE MECHANICAL VALVE) SET TOO LOW OR SLOW IGNITION MINIMUM OR SLOW IGNITION.

  • Page 62: Diagnostics

    MAINTENANCE INSTRUCTIONS 6.8 Diagnostics ■ Error codes: Ionisation Lock Out Safety Thermostat Tripped Flue Gas Thermostat Tripped Low Water Pressure Alarm Heating Sensor Malfunction D.H.W Sensor Malfunction Electric Fan Malfunction Parameter Programming Request Flame Detection Malfunction ■ Function codes : Code Function Description...

  • Page 63: Parts List

    MAINTENANCE INSTRUCTIONS 6.9 Parts List Main components CODE DESCRIPTION RKR 24 RKR 28 RKR 34 √ 20040LA PLATE EXCHANGER 16 PLATES √ 20047LA PLATE EXCHANGER 20 PLATES √ 20076LA PLATE EXCHANGER 14 PLATES √ 30-00041 CONDENSING EXCHANGER 3+1 CBD COMPLETE √...
  • Page 66 eXtraheat Limited Belmayne House Clarkehouse Road Sheffield S10 2LN South Yorkshire Phone Number 0844 3814115 Fax Number 01142 309147 E Mail: radiantboilers@extraheat.co.uk radiantcustomersupport@extraheat.co.uk Website: www.radiant.eu THE TECHNICAL DATA AND MEASUREMENTS ARE PROVIDED FOR INFORMATION PURPOSES ONLY AND ARE NOT BINDING. THE COMPANY RESERVES THE RIGHT TO APPLY VARIATIONS WITHOUT PRIOR NOTIFICATION.

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