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Instruction Manual
for models
RKA 25
Premix condensing boiler
with storage cylinder
SEDBUK BAND A
GAS COUNCIL NUMBER: 47-651-21
Installation, operating, commissioning and maintenance instructions.
CE
0694
TG05A095.A0306
Documentazione Tecnica RADIANT BRUCIATORI S.p.A. Montelabbate (PU) ITALY
ENGLISH
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Summary of Contents for Radiant RKA 25
- Page 1 Instruction Manual for models RKA 25 Premix condensing boiler with storage cylinder SEDBUK BAND A GAS COUNCIL NUMBER: 47-651-21 Installation, operating, commissioning and maintenance instructions. 0694 TG05A095.A0306 Documentazione Tecnica RADIANT BRUCIATORI S.p.A. Montelabbate (PU) ITALY ENGLISH...
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Page 3: Table Of Contents
CONTENTS 1. General information General Installation Information page Product conformity page 2. Technical characteristics Technical data page Dimensions page 2.3 Internal parts of the boiler page 2.4 Water circuit page 2.5 Circulation pump head graph page Printed circuit board page Control panel page 3. - Page 4 CONTENTS 5. Commissioning the appliance (authorised personnel) Parameter table page Parameter programming - regulating the gas pressure page Gas data page Regulating the stepped ignition sequence page 5.5 Converting the boiler to a different gas type page 6. Servicing the appliance (authorised personnel) General warnings page Boiler inspection...
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Page 5: General Information
• In the case of a fault and/or malfunction in the appliance, shut down the system. Do not interfere with or attempt any repairs. Call for professionally qualified technical assistance only. Radiant Helpline UK 0870 770 0414 • Any warranty repairs to the appliance must be carried out exclusively by the manufacturer’s authorised service centre using original spare parts. - Page 6 • The user must not replace the power supply cable. • If the cable is damaged in any way, switch off the appliance and have the cable replaced by a suitably qualified electrician. Radiant Helpline UK 0870 770 0414 • TG05A095.A0306...
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Page 7: Product Conformity
GENERAL INFORMATION 1.2 Product conformity RADIANT BRUCIATORI S.p.A. declare 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... -
Page 8: Technical Characteristics
TECHNICAL CHARACTERISTICS 2. TECHNICAL CHARACTERISTICS 2.1 Technical data Appliance Model RKA 25 Technical Data CE certification no. n° 0694BN3485 Flue category (UNI10642) C13, C33, C43, C53, C83 Heat Input max Heat Input min Heat Output max (80/60°) 24.60 Heat Output max (50/30°) 26.68... -
Page 9: Dimensions
TECHNICAL CHARACTERISTICS 2.2 Dimensions mod. RKA 25 106.5 106.5 84.5 75.5 HEATING RETURN CONNECTION Ø3/4” HEATING FLOW CONNECTION Ø3/4” GAS CONNECTION Ø1/2” COLD WATER CONNECTION Ø1/2” HOT WATER CONNECTION Ø1/2” CONDENSATE DRAIN CONDENSING BOILOES WITH STORAGE - TG05A095.A0306... -
Page 10: Internal Parts Of The Boiler
TECHNICAL CHARACTERISTICS 2.3 Internal parts of the boiler mod. RKA 25 LEGEND HEATING SENSOR CONDENSING EXCHANGER HEATING SAFETY THERMOSTAT IGNITION ELECTRODE FRAME FLAME IONISATION ELECTRODE MIXING GROUP ELECTRONIC IGNITION BOARD ELECTRONIC GAS VALVE VK4105 A 1001 AUTOMATIC AIR VENT 3-SPEED CIRCULATION PUMP WITH AIR VENT... -
Page 11: Water Circuit
TECHNICAL CHARACTERISTICS 2.4 Water circuit LEGEND PRIMARY CONDENSING HEAT EXCHANGER PREMIX BURNER UNIT (GAS MANIFOLD + BURNER) CONDENSATE DRAIN PIPE IGNITION ELECTRODE SENSOR ELECTRODE ELECTRIC FAN VENTURI ELECTRONIC IGNITION PCB ELECTRONIC GAS VALVE 10. HEATING CIRCUIT 3 BAR SAFETY VALVE 11. -
Page 12: Circulation Pump Head Graph
TECHNICAL CHARACTERISTICS 2.5 Circulation pump head/flow graph 1200 1400 1600 1000 Flow l/h Head available for the system at maximum speed Head available for the system with bypass 50% open Appliance Loss CONDENSING BOILOES WITH STORAGE - TG05A095.A0306... -
Page 13: Printed Circuit Board
TECHNICAL CHARACTERISTICS ® 2.6 DIAGNOCODE series SM 20015 Printed Circuit Board Technical characteristics Part Number 76655LA The new circuit boards greatly simplify the adjustment of the operating parameters of the entire system. In fact, it is now possible to adjust the following settings: Adjustments possible by service personnel only •... -
Page 14: Control Panel
INSTALLATION INSTRUCTIONS 2.7 Control panel LEGEND ON/OFF SWITCH HEATING TEMPERATURE CONTROL KNOB D.H.W TEMPERATURE CONTROL KNOB (only for model RKR 25). OUTSIDE TEMPERATURE DISPLAY BUTTON (ONLY WITH OPTIONAL OUTDOOR SENSOR FITTED) SERVICE BUTTON. SUMMER, WINTER OR SUMMER/WINTER SELECTION BUTTON. TERMINAL BOARD FOR EXTERNAL WIRING. D.H.W FUNCTION INDICATOR (THE BOILER IS IN SUMMER OR SUMMER/WINTER MODE ) (only for model RKR 25) Hot water mode is selected FIXED LIGHT –... -
Page 15: Installing The Appliance (Authorised Personnel)
INSTALLATION INSTRUCTIONS 3. INSTALLING THE APPLIANCE 3.1 Reference standard The following list is the full lists of codes of practice and British Standards That engineers should work to in the UK. It is law in the UK that a competent person installs all gas-burning appliances. Please ensure that the installer is a class of person approved for the time being by the Heath and Safety Executive for the purpose of carrying out this work. -
Page 16: Unpacking
Fig. 1 STORAGE & HANDLING Please note that prior to installation the Radiant boilers should be stored in the horizontal position with no more than three boilers to a stack; Ensure that the boilers are stored in dry conditions and be aware that the carton is a tow-man lift;... -
Page 17: Installing The Boiler
M INIM UM DISTANCES IN mm M odel RKA 25 1000 In order to allow access to the interior of the boiler for maintenance purposes, it is important that the minimum distances Fig. 1 indicated in figure 1 are respected. To... -
Page 18: Water Connections
INSTALLATION INSTRUCTIONS 3.4 Water connections order safeguard heat HR HWO G exchanger and circulation pump, it is recommended that the system is hot- 84.5 75.5 flushed remove impurities (especially oil and grease) from the pipes and radiators. Please ensure that all discharge and safety pipes connected... -
Page 19: Central Heating Circuit
INSTALLATION INSTRUCTIONS 3.5 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 system, the pump head, expansion vessel size, mean radiator temperature, etc. -
Page 20: Condensate Drain
INSTALLATION INSTRUCTIONS 3.6 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: Discharge Piping
INSTALLATION INSTRUCTIONS 3.7 Discharge piping The discharge pipework from the tundish: 1. Shall fall continuously through its length. 2. Shall be of metal construction 3. Shall not be fitted with any valves or taps. 4. Shall discharge to a safe visible position, e.g. onto the surface of an external wall or into a gulley. 5. -
Page 22: Circulating Loop
INSTALLATION INSTRUCTIONS 3.8 D.H.W. circulating loop a. unscrew cap A on the top of cylinder. b. Insert the copper pipe B , supplied by the manufacturer, into the ½” connection and than connect the loop pipe C . c. if the system requires an additional expansion vessel for the D.H.W. -
Page 23: Gas Connection
The connection to the mains power supply must be carried out by professionally qualified personnel, registered in accordance with current legislation and authorised by Radiant Bruciatori. 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 (Standard CEI 64-8 Electrical Installations). -
Page 24: Room Thermostat - Outdoor Sensor Connections
INSTALLATION INSTRUCTIONS Electric power supply 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 panel of the boiler. c. Slacken the screws and remove plate A (see fig. -
Page 25: Remote Control Connection
INSTALLATION INSTRUCTIONS 3.12 Connecting the “Remoto” thermostat/timer If the optional remote thermostat/timer has been purchased, this must be connected to the modulation board installed in the boiler control panel. To access the modulation board, proceed as follows: 1. Switch off the power supply at the main switch. - Page 26 INSTALLATION INSTRUCTIONS 6. Connect plug M1 to the interface board and plug M11 to the modulation board (fig. 7 Connect the grey and orange wires to plug M2 of the interface board and to the terminal board. 8. Connect the wires of plug M3 on the interface board to the terminal board.
- Page 27 INSTALLATION INSTRUCTIONS Regulating the Flow temperature in accordance with the outdoor temperature The outdoor sensor can be connected either to the remote control or directly to circuit board SM 20015. The sensor can thus be managed in one of two ways: •...
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Page 28: Flue Connections
INSTALLATION INSTRUCTIONS 3.13 Flue connections In order to ensure that the appliance functions correctly and efficiently, the flue connection between the boiler and the flue terminal must be made using original components specifically designed for condensing boilers. Traditional flue components cannot be used for conveying exhaust fumes from condensing boilers, nor vice versa. - Page 29 INSTALLATION INSTRUCTIONS Flue position IMPORTANT: THE FLUE SYSTEM SHALL BE INSTALLED IN ACCORDANCE WITH THE 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 30 INSTALLATION INSTRUCTIONS Chimneys – UNI 7129/01 ■ distance ≤ distance > 5 m The chimney constitutes the outlet point of exhaust fumes from a single flue or from a series of branched flues. Although the chimneys may have various sizes Volume and shapes, they must nevertheless comply with tecnico...
- Page 31 The linear equivalent of additional bends is as follows: Ø 100/60 x 90° bend = 0.8 m. Ø 100/60 x 45° bend = 0.5 m. N.B.: USE ONLY RADIANT TYPE- APPROVED FLUE SYSTEMS FOR DISCHARGING EXHAUST GASES AND DRAWING COMBUSTION AIR.
- Page 32 The addition of a bend has the effect of increasing the linear equivalent length of the duct as follows: Ø 80 x 90° bend = 1.5 m. Ø 80 x 45° bend = 1.2 m. N.B.: USE ONLY RADIANT TYPE- APPROVED FLUE SYSTEMS DISCHARGING EXHAUST GASES AND DRAWING COMBUSTION AIR.
- Page 33 Ø 100/60 x 45° bend = 0.5 m. Ø 100/60 x 90° bend = 0.8 m. Ø 100/60 x 45° bend = 0.5 m. N.B.: USE ONLY RADIANT TYPE- N.B.: USE ONLY RADIANT TYPE- APPROVED FLUE SYSTEMS FOR APPROVED FLUE SYSTEMS FOR...
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Page 34: General Warnings (Flushing The System)
4.1 General warnings The following operations must be carried out by professionally qualified personnel, registered in accordance with current legislation and authorised by Radiant Bruciatori S.p.A. 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. -
Page 35: 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 PLUG This should be disconnected when not in use. AIR VENT VALVE Check the properties of the water supply and CIRCULATION PUMP install the appropriate treatment devices if the mains water has a hardness rating more than... -
Page 36: Flushing The System
INSTALLATION INSTRUCTIONS 4.3 Flushing the system O FLUSH OUT THE PRIMARY SIDE OF THIS UNIT Fill the boiler as per the filling instructions. Using a drain off cock on the lowest point of the system allow the water to drain from the system and boiler. In order to flush the system correctly turn off all radiators open the filling loop and drain cock simultaneously and allow the water to flow through the boiler. -
Page 37: Starting Up The Boiler
INSTALLATION INSTRUCTIONS 4.5 Starting up the boiler Table n°1 Once the system has been filled, proceed as Gas type follows: • Check that the exhaust flue is free of G 30 10.9 obstructions and correctly connected to G 31 10.96 the boiler. -
Page 38: Parameter Table
REGULATION INSTRUCTIONS 5. COMMISSIONING THE BOILER 5.1 Parameter table PARAMETER PARAMETER OPTIONS FUNCTION N° VALUE INSTANTANEOUS BOILER SELECTS TYPE OF BOILER BOILER WITH STORAGE TANK BOILER TANK WITH +7°(stored water temp. increased by 7°) NATURAL GAS SELECTS TYPE OF GAS SETS THE CENTRAL HEATING 30-80°C FOR STANDARD SYSTEMS TEMPERATURE... -
Page 39: Parameter Programming - Regulating The Gas Pressure
REGULATION INSTRUCTIONS 5.2 Parameters programming 5.2.1 Entering Parameters Menu Each time you wish to change or check any parameter value, you should access the parameter menu, following this procedure: Place the ON/OFF switch in OFF position; Keep pressed the (▲) and (▼) buttons, switch on the boiler and wait for the display to show ‘PL’... - Page 40 REGULATION INSTRUCTIONS 5.2.2 Parameters settings To enter the parameters menu, follow the procedure shown at page n° 35 (steps 1-6). ◄ PARAMETER N° 1 – TYPE OF BOILER Use (▲) and (▼) buttons to modify the value of the parameter: 00 = Instantaneous boiler;...
- Page 41 REGULATION INSTRUCTIONS ◄ PARAMETER N° 4 – PUMP MODE ON CENTRAL HEATING PHASE Use (▲) and (▼) buttons to modify the value of the parameter: 00 = STANDARD (3 ‘ OVERRUN) 01 = ALWAYS RUNNING (to be activated ONLY FOR SYSTEM BOILERS ); Press and release the service ( S ) button to confirm your choice.
- Page 42 REGULATION INSTRUCTIONS ◄ PARAMETER N° 7 – CENTRAL HEATING PUMP OVERRUN Use (▲) and (▼) buttons to modify the value of the parameter: 00 = 0 99 = 99 x 5’’ = 450 ‘’ = 7.5’ Default value is set to 36 = 180’’ = 3’ Press and release the service ( S ) button to confirm your choice.
- Page 43 REGULATION INSTRUCTIONS ◄ PARAMETER N° 10 – MINIMUM HEATING POWER The value of the parameter must be equal to the one shown into page 35 table. Use (▲) and (▼) buttons to modify the value of the parameter: 24 for Natural Gas 21 for L.P.G.
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Page 44: Gas Data
REGULATION INSTRUCTIONS 5.3 Gas data 5.3.1 Data Tables Table n°1 – CO values Gas type G20 Natural Gas G 30 Butane 10.9 G 31 Propane 10.96 NATURAL GAS LIQUID BUTANE GAS LIQUID PROPANE GAS Table n°2 - Gas data table Lower Wobbe index (15°C;... -
Page 45: Regulating The Stepped Ignition Sequence
REGULATION INSTRUCTIONS 5.4 Regulating the stepped ignition sequence Each time the appliance is started up, in order to provide optimum ignition and an even flame distribution over the entire surface of the burner, a stepped ignition sequence is used. This consists of an instantaneous and brief increase in the gas pressure during the ignition phase only. -
Page 46: Converting The Boiler To A Different Gas Type
REGULATION INSTRUCTIONS 5.5 Converting the boiler for different gas type The conversion of a boiler from burning natural gas to LPG, or vice versa, must be carried out exclusively by professionally qualified personnel, registered accordance with current legislation. Check that the gas supply pipe is suitable for the new fuel type. -
Page 47: General Warnings
All maintenance operations must be carried out according to UNI-CIG 7129/01, and subsequent updates, by professionally qualified personnel, registered in accordance with current legislation. All warranty work is to be carried out and authorised by Radiant Bruciatori S.p.A Service centre. The RADIANT HELPLINE UK 0870 770 0414 The frequency of the boiler maintenance must comply with current law and, nevertheless, should be carried out once a year. -
Page 48: Maintenance For Unvented Components
USER INSTRUCTIONS 6.3 Maintenance for unvented components It is essential that the unvented hot water components have a regular maintenance programme. It is Radiant’s recommendation that this be carried out in conjunction with the annual boiler service. The S and C... -
Page 49: Accessing The Boiler
USER INSTRUCTIONS 6.4 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 50: Draining The Central Heating And Domestic Hot Water System
USER INSTRUCTIONS 6.5 Draining the central heating and the domestic hot water systems RAINING THE CENTRAL HEATING SYSTEM If the need arises to drain the system, this can be done as follows: Fig. 4 • Switch the system to “WINTER” mode and ignite the boiler. -
Page 51: Wiring Diagrams
USER INSTRUCTIONS 6.6 Wiring diagrams R156A CONDENSING BOILOES WITH STORAGE - TG05A095.A0306... -
Page 52: Troubleshooting
USER INSTRUCTIONS 6.7 Troubleshooting PROBLEM POSSIBLE CAUSE REMEDY ERROR CODE NO FLAME WITH NO IGNITION NO GAS. CHECK MAINS SUPPLY. IGNITION ELECTRODE BROKEN OR EARTHED. REPLACE PART. IGNITION CIRCUIT BOARD S4565QM REPLACE PART. MALFUNCTION. REPLACE PART. GAS VALVE MALFUNCTION. REGULATE MINIMUM MECHANICAL MINIMUM ADJUSTMENT (ON GAS SLOW IGNITION. -
Page 53: Diagnostics
SUMMER POSITION AND HEATS THE D.H.W CIRCUIT. THE FUNCTION IS DEACTIVATED WHEN THE D.H.W SENSOR DETECTS A TEMPERATURE OF 8°C. INCOMPATIBLE THE FUNCTION IS ACTIVATED WHEN A RADIANT REMOTE REMOTE CONTROL. CONTROL OR INTERFACE BOARD IS NOT PRESENT. CONDENSING BOILOES WITH STORAGE - TG05A095.A0306... -
Page 54: Parts List
USER INSTRUCTIONS 6.9 Parts list ■ main components PART DESCRIPTION RKA 25 NUMBER 20025LA ANODE W/ CONTROL VALVE 20040LA PLATE EXCHANGER 16 P 20050LA CONDENSING EXCHANGER RKA R 4+1 GM30-75-064 20051LA CYLINDER 14 LT. RKA 24029LA CIRCULATING PUMP MOTOR RSL 15/6-3-KUCLF6... - Page 55 USER INSTRUCTIONS MULTIPLEX unit – mod. RKA 25 ■ 43150LA 64066LA 43139LA 54022LA 89116NA 89116NA 64065LA 20040LA 43135LA 64069LA 89122NA 89122NA 43150LA 43145LA 43150LA 43151LA 64063LA 61004LP 64075LA 54023LA 64061LA 43139LA 43139LA 43150LA 54022LA 43150LA 43150LA 43159LA 54022LA 43139LA 96034LA...
- Page 56 RADIANT BRUCIATORI s.p.a. Via Pantanelli, 164/166 - 61025 Loc. Montelabbate (PU) Tel. +39 0721 9079.1 • fax. +39 0721 9079279 e-mail: tecnico@radiant • Internet: http://www.radiant.it RADIANT HELPLINE UK Technical Helpline - 0870 770 0414 Spares - 0870 770 0425 Email - info@portsdean.co.uk...