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Radiant RK 18 OV Instruction Manual

Premix condensing boiler
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CE
0694
RK 18_25 OV - 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
RK 18 OV
RK 25 OV
Premix condensing boiler
for model
- CBD
ENGLISH

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Summary of Contents for Radiant RK 18 OV

  • Page 1 Instruction Manual for model RK 18 OV RK 25 OV Premix condensing boiler Installation, operating, commissioning and maintenance instructions 0694 - CBD RK 18_25 OV - 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 pag. 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 Printed circuit board – Technical characteristics 2.6 Control panel 3. Installation (authorised personnel) 3.1 Reference standard 3.2 Boiler room –...

  • 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 • 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. Open doors and windows immediately to create a current of air and ventilate the room.

  • 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

    INSTALLATION INSTRUCTIONS 2. TECHNICAL CHARACTERISTICS 2.1 Technical data Models RK 18 OV RK 25 OV CE Certification n° 0694BN3485 Appliance Type B23p-B33-C13-C33-C43-C53-C63-C83-C93 Appliance Category II2H3+ Heat Input max Heat Input min Heat Output max (50/30° ) 19.26 26.67 Heat Output max - 80/60° C (Non condensing) 17.69...
  • Page 8 INSTALLATION INSTRUCTIONS Models RK 18 OV RK 25 OV Efficiency 100% (full load 80/60° ) 98.3 98.4 Efficiency 100% (full load 50/30° ) 106.7 Efficiency 30% (partial load) 101.1 100.1 Flue efficiency losses with burner on (50/30° C) (Pn /Pr)

  • Page 9: Dimensions

    INSTALLATION INSTRUCTIONS 2.2 Dimensions LEGEND HEATING RETURN Ø mm HEATING FLOW Ø mm Ø mm...

  • Page 10: Internal Parts Of The Boiler

    INSTALLATION INSTRUCTIONS 2.3 Internal parts of the boiler LEGEND 1. SAFETY THERMO FUSE 2. PREMIX BURNER UNIT (GAS MANIFOLD + BURNER) 3. IGNITION ELECTRODE 4. HEATING SAFETY THERMOSTAT 5. HEATING SENSOR 6. ELECTRONIC MODULATING FAN 7. CONDENSATE PIPE 8. CONDENSATE TRAP 9.

  • Page 11: Water Circuit

    INSTALLATION INSTRUCTIONS 2.4 Water circuit LEGEND PRIMARY CONDENSING HEAT EXCHANGER PREMIX BURNER UNIT (GAS MANIFOLD+BURNER) PRIMARY CONDENSING HEAT EXCHANGER CONDENSATE DRAIN PIPE IONISATION ELECTRODE IGNITION ELECTRODE VENTURI IGNITION TRANSFORMER ELECTRONIC GAS VALVE HEATING SAFETY THERMOSTAT HEATING SENSOR FLUE HOOD SAFETY THERMO FUSE ROOM SEAL CHAMBER BACK SIDE CONDENSATE TRAP CONDENSATE DRAIN PIPE...

  • Page 12: Printed Circuit Board - Technical Characteristics

    INSTALLATION INSTRUCTIONS ® 2.5 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 13: Installation (Authorised Personnel)

    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 14: 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 15: Installation Boiler

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

  • Page 16: Open Vented Water System

    INSTALLATION INSTRUCTIONS 3.5 Open Vented Water System The appliance is suitable for open vented pumped systems, sealed systems where additional control protection is required. The following conditions should be observed: The static head must not exceed 30 m (100ft) of water; If the boiler is used in conjunction with a cylinder for hot water, the cylinder must be of an indirect type;...

  • Page 17: Sealed Water System

    INSTALLATION INSTRUCTIONS 3.6 Sealed Water System Safety valve: a safety valve complying with BS 6750 Part 1 must be fitted close to the boiler on the flow pipe by means of a horizontal or vertically upward connection with no intervening valve or restrictions and should be positioned to facilitate testing.

  • Page 18: Water Connection

    INSTALLATION INSTRUCTIONS 3.7 Water connections In order to safeguard the heat exchanger and HR HF circulation pump, especially in case of boiler Ø22 replacement, it is recommended that the 3/4" system is hot-flushed to remove any impurities (especially oil and grease) from the pipes and radiators.

  • Page 19: Condensate Drain

    INSTALLATION INSTRUCTIONS 3.8 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 20: Gas Connection

    INSTALLATION INSTRUCTIONS 3.9 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 21: Electrical Connections

    INSTALLATION INSTRUCTIONS 3.10 Electrical connections 3.10.1 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 22 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 23: Flue Connections

    INSTALLATION INSTRUCTIONS 3.11 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 24 INSTALLATION INSTRUCTIONS Concentric Flue System- Type K Horizontal concentric flue kit Ø60/100 mm polypropylene inner pipe. Adjustable through 360° .Discharges exhaust fumes an d draws air from atmosphere. Suitable condensing boilers only. Discharges exhaust gases draws combustion air by means of two concentric ducts.
  • 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: RK 18 OV - 12 m RK 25 OV - 10 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 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. Suitable condensing boilers only. Discharges exhaust gases draws...
  • Page 27 INSTALLATION INSTRUCTIONS Vertical Flue System - Type V Vertical concentric flue kit Ø60/100 polypropylene inner pipe. Discharges exhaust fumes and draws air directly from roof level. Suitable for condensing boilers only. Discharges exhaust gases and draws combustion air at roof level by means of two concentric ducts.
  • Page 28 Ø80 plastic inner duct discharges the exhaust fumes. MAXIMUM FLUE LENGTH: RK 18 OV - 12 m RK 25 OV - 10 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: 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 30: Filling The Condensate Trap

    INSTALLATION INSTRUCTIONS 4.2 Filling the condensate trap The condensation trap must be pre-filled when starting the boiler for the first time in order to prevent flue gases from flowing back through the trap. The filling operation is carried out as follows (see fig. •...

  • Page 31: Starting Up The Boiler

    4.3 Starting up the boiler Once the system has been filled, proceed as follows: Table n° 1 RK 18 OV RK 25 OV • Check that the exhaust flue is free of obstructions and correctly connected to Gas type the boiler;...

  • Page 32: Regulating The Appliance (Authorised Personnel)

    REGULATION INSTRUCTIONS 5. REGULATING THE APPLIANCE 5.1 Parameters table PARAMETER PARAMETER N° TYPE OF OPERATION FUNCTION VALUE 00 = 18Kw 01(default) 01 = 25Kw 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 33: 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 34 REGULATION INSTRUCTIONS PARAMETER P00 – SELECTS THE MODEL OF BOILER 6. Use buttons ‘+’ and ‘-‘ to modify the value of the parameter: 00 = 18 Kw 01 = 25 Kw (default) 02 = 29 Kw 03 = 34 Kw 04 = 50 Kw P 00 7.
  • Page 35 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 36 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 37 REGULATION INSTRUCTIONS PARAMETER P10 – MINIMUM FAN SPEED SETTING (not applicable) P 10 PARAMETER P11 – MAXIMUM FAN SPEED SETTING (not applicable) P 11 PARAMETER P12 – MINIMUM FAN SPEED SETTING (CENTRAL HEATING) 6. Use buttons ‘+’ and ‘-’ to modify the value of the parameter between: min = 33 Hz ;...
  • Page 38 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 39: Gas Data

    REGULATION INSTRUCTIONS 5.3 Gas data Technical data tables - RK 18 OV Table no.1 - CO Values Gas type Natural gas - G20 Liquid Butan Gas - G 30 11.1 Liquid Propane Gas - G 31 10.1 Table no.2 - Frequency...
  • Page 40 REGULATION INSTRUCTIONS Technical data tables - RK 25 OV Table no.1 - CO Values Gas type Natural gas - G20 Liquid Butan Gas - G 30 10.9 Liquid Propane Gas - G 31 10.96 Table no.2 - Frequency Gas type Minimum (Hz) Maximum (Hz) Natural gas - G20...

  • Page 41: 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 42: General Warnings Pag

    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 43: 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 front panel been removed. Front panel: Remove the fixing screws at the lower edge of the front panel.

  • Page 44: 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 45 MAINTENANCE INSTRUCTIONS Cleaning the main exchanger module and combustion unit (see fig. 1) • Disconnect the electrical connections of the primary heat electric fan. exchanger • Disconnect the joint and remove the pipe linking the gas valve to the injector unit (venturi). •...
  • Page 46 MAINTENANCE INSTRUCTIONS Part replacement Ignition and/or flame detection electrodes (see fig. 1) • Un-Plug the electrode wires; ignition electrode • Slacken the fixing screws; • Remove the electrodes. When fitting the new ones, check that the seals are not damaged. Replace if necessary;...
  • Page 47 MAINTENANCE INSTRUCTIONS Gas valve (see fig. 1) • Disconnect the joints and remove the gas pipe connecting the gas valve to the venturi. • Disconnect the gas valve ring – nut at the bottom of the room – sealed chamber back side. •...
  • Page 48 MAINTENANCE INSTRUCTIONS Primary heat exchanger (see fig. 1) • Close the shut-off valves and drain the central heating circuit of the boiler; • Switch off the power and gas supply to the boiler; primary heat flue connection exchanger • Remove and dismantle the entire burner unit (see chamber 6.6.1 “Cleaning the condensation module and burner unit”);...
  • Page 49 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 50: Wiring Diagrams

    MAINTENANCE INSTRUCTIONS 6.6 Wiring diagrams Electrical connections PRINTED CIRCUIT BOARD DIGITECH 2 - SM30003 COD. 40-00016 brown light-blue light-blue brown Legend Main Switch Safety thermostat Thermo Fuse 102°C Heating sensor Ionisation electrode Ignition electrode TRA: Ignition transformer Gas Valve 10000 Ohm SL: Switched live from external control 240V connection Pacq...

  • Page 51: Troubleshooting

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

  • Page 52: Diagnostics

    MAINTENANCE INSTRUCTIONS 6.8 Diagnostics ■ Error codes: Ionisation Lock Out Safety Thermostat Tripped Flue Gas Thermofuse Tripped Low Water Pressure Alarm Heating Sensor Malfunction Electric Fan Malfunction Parameter Programming Request Flame Detection Malfunction ■ Function codes : Code Function Description Pressing the “service”...

  • Page 53: Parts List

    MAINTENANCE INSTRUCTIONS 6.10 Parts List Main components CODE DESCRIPTION RK 18 OV RK 25 OV √ √ 27044LA CONDENSATE TRAP √ 30-00041 CONDENSING EXCHANGER 3+1 CBD COMPLETE √ 30-00042 CONDENSING EXCHANGER 4+1 CBD COMPLETE √ √ 35031LA IGNITION ELECTRODE √...
  • Page 56 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.

This manual is also suitable for:

Rk 25 ov

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