Radiant RK 25 /B Instruction Manual - 1. General Information

Summary of RK 25 /B

  • Page 1

    Installation, operating, commissioning and maintenance instructions. Ce 0694 rka 34.20 - rad - ing - man.Inst - 1310.1 - digitech cs - miah4 technical specification radiant bruciatori s.P.A. Montelabbate (pu) italy english instruction manual for model rka 34 /20 wall mounted storage combi boiler pre...

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    Contents 1. General information 1.1 general warnings pag. 1 1.2 product conformity 3 2. Technical characteristics 2.1 technical data 4 2.2 dimensions 5 2.3 internal parts of the boiler 6 2.4 water circuit 7 2.5 circulation pump head/flow graph 8 2.6 printed circuit board – technical characteristics ...

  • Page 4

    Contents 6. Maintenance (authorised personnel) 6.1 general warnings 43 6.2 boiler inspection 43 6.3 accessing the boiler 44 6.4 draining the central heating and domestic hot water system 45 6.5 maintenance operations 46 6.6 wiring diagrams 55 6.7 electrical connections (option) 56 6.8 troubleshootin...

  • Page 5: 1. General Information

    General information 1 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. With ‘professionally qualified personnel’ is intended a personnel with techn...

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    General information 2 • as dictated by current legislation, this appliance must be installed exclusively by qualified personnel. Before starting the boiler for the first time, make sure that it is connected to a water supply and central heating system compatible with its performance characteristics....

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    General information 3 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...

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    Installation instructions 4 2. Technical characteristics 2.1 technical data model rka 34 /20 ce certification n° 0694co7385 appliance type b23p-b33-c13-c33-c43-c53-c63-c83-c93 appliance category ii2h3b/p heat input max kw 34 heat input min kw 10 heat output max (50/30°) kw 36.24 efficiency 100% (ful...

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    Installation instructions 5 490 90 0 480 180 102 208 26 0 31 1 cd hf cwi g hwo hr 74 70 78 86 80 102 2.2 dimensions legend hr heating return Ø3/4” hf heating flow Ø3/4” g gas Ø1/2” cwi cold water inlet Ø1/2” hwo hot water outlet Ø1/2” cd condensate drain Ø25.

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    Installation instructions 6 12 10 9 8 7 6 5 4 3 2 1 25 24 23 22 21 20 19 18 14 11 13 15 16 17 2.3 internal parts of the boiler legend 1. Safety thermo fuse 2. Manual air vent valve 3. Primary condensing heat exchanger 4. Premix burner unit (gas manifold+burner) 5. Ionisation electrode 6. Heating sen...

  • Page 11

    Installation instructions 7 2.4 water circuit legend 1. Safety thermo fuse 2. Manual air vent valve 3. Heating sensor 4. Heating safety thermostat 5. Premix burner unit (gas manifold + burner) 6. Primary condensing heat exchanger 7. Expansion vessel 8. Fan 9. Electronic gas valve 10. No-return valve...

  • Page 12: Appliance Loss

    Installation instructions 8 2.5 circulation pump head/flow graph h e a d ( m ) appliance loss iii pump head at maximum speed pump head at second speed ii i pump head at minimum speed flow m3/h i ii iii.

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    Installation instructions 9 2.6 digitech ® cs printed circuit board (miah4) technical characteristics adjustments for service personnel only • standard (30/80°c) / reduced (25-45°c) central heating temperature • water hammer prevention function • central heating timer - (adjustable from 0 to 7,5 min...

  • Page 14

    Installation instructions 10 lcd display icons’ key 1. Parameter number information 2. Parameters programming mode on 3. Solar pcb connection information / solar panel temperature display (d6) 4. Solar pump on 5. Storage cylinder low level temperature visualization (d7) / storage cylinder high level...

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    Installation instructions 11 3. Installation (authorised personnel) 3.1 reference standard this appliance meets the requirements of: - ipx4d rating for electrical appliances. - emc directive 89/336 cee - lvd directive 73/23 cee - boiler efficiency directive 92/42 cee failure to install a gas applian...

  • Page 16

    Installation instructions 12 b c a 3.3 unpacking ■ the materials (cardboard) used for packing the appliance are fully recyclable. ■ it is recommended that the packing material is only removed prior to installing the boiler. The manufacturer will not be held responsible for damage caused by incorrect...

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    Installation instructions 13 3.4 installing the boiler ■ the 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 or outhouse. (the boil...

  • Page 18

    Installation instructions 14 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. Make sure th...

  • Page 19

    Installation instructions 15 condensate drain the condensate drain flexible pipe supplied with the boiler must be connected to a proper condensate trap. The condensate discharge into the drainage system is allowed providing a condensate trap (siphon) is installed. Any condensate discharge pipe work ...

  • Page 20

    Installation instructions 16 3.7 gas connection the connection to the gas supply must be carried out by professionally qualified personnel in accordance with relevant standards: when connecting the boiler to the gas supply pipe, only use appropriate washers and gas fittings. The use of hemp, teflon ...

  • Page 21

    Installation instructions 17 3.8 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 and authorised by radiant bruciatori s.P.A. Always check to make sure that th...

  • Page 22

    Installation instructions 18 remote control 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. With t...

  • Page 23: 3.9  Flue Connections

    Installation instructions 19 3.9 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 c...

  • Page 24

    Installation instructions 20 flue type - kit ak50 horizontal concentric flue kit Ø80/125 mm polypropylene inner pipe adjustable through 360°. Discharges exhaust fumes and draws air from atmosphere. Suitable for condensing boilers only. Discharges exhaust gases and draws combustion air by means of tw...

  • Page 25

    Installation instructions 21 flue type - kit h horizontal twin pipe flue kit Ø80/80 – Ø60/60 in polypropylene adjustable through 360°. The dual pipe system discharges exhaust fumes into a chimney and draws air from atmosphere. Suitable for condensing boilers only. Discharges exhaust gases and draws ...

  • Page 26

    Installation instructions 22 flue type - kit ck50 vertical concentric flue kit Ø80/125 polypropylene inner pipe. Discharges exhaust fumes and draws air directly from high level. Suitable for condensing boilers only. Discharges exhaust gases and draws combustion air at roof level by means of two conc...

  • Page 27

    Installation instructions 23 4. Commissioning the appliance 4.1 general warnings the following operations must be carried out by professionally qualified personnel, registered in accordance with current legislation. The boiler leaves the factory pre-set and tested for burning either natural gas or l...

  • Page 28

    Installation instructions 24 4.2 filling the system check the properties of the water supply and install the appropriate treatment devices if the mains water has a hardness rating more than 25 °f, i n order to prevent scaling and eventual damage to the d.H.W heat exchanger. Use only clean tap water ...

  • Page 29

    Installation instructions 25 4.3 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. 1): • remove plug t and fill ...

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    Installation instructions 26 4.4 frost protection the boiler is protected from freezing by electronic board settings and special functions that provide the starting of the burner to heat all the interested parts, when their temperature drops below the minimum preset values, protecting the boiler up ...

  • Page 31

    Installation instructions 27 t a l n t a s e s e 220 v - 50 hz fig. 1 terminal board wh ite white brown thermostat fixing clip blue heating elements heating elements kit installation and wiring please proceed as follows: a. Switch off the power supply at the main switch; b. Position the 4 resistance...

  • Page 32

    Installation instructions 28 4.5 starting up the boiler once the system has been filled, proceed as follows: • check that the exhaust duct is free from obstructions and correctly connected to the flue exhaust system; • switch on the power supply to the boiler. • the ignition system will automaticall...

  • Page 33: 5. Regulating The Boiler

    Maintenance instructions 29 5. Regulating the boiler 5.1 parameters table parameter n° type of operation parameter value function p00 selects the model of boiler 00-06 00 = 13 kw 01 = 18 kw 02 = 25 kw 03 = 28 kw 04 = 34 kw 05 = 50 kw 06 = 100 kw p01 selects the type of boiler 00-05 00 = istantaneous...

  • Page 34

    Maintenance instructions 30 parameter n° type of operation parameter value function p18 sets the 0-10v industrial bus piloting 00-02 00 = disabled 01 = flow temperature control mode 02 = burner output control mode p19 central heating minimum set point 20 - 40 displayed in °c p20 central heating maxi...

  • Page 35

    Maintenance instructions 31 5.2 accessing the parameters menu to modify the preset values of the parameters reported in the previous table, open the parameter settings menu as follows: 1. Place mode selection button ‘ ’ in off position, visualized by symbol; 2. Keep pressed ‘ ’ and ‘ ’ buttons simul...

  • Page 36

    Maintenance instructions 32 5.3 setting the parameters parameter p00 – selects the model of boiler to enter the parameters menu, follow the previously described procedure (see paragraph 5.2 ‘accessing the parameters menu’ - steps 1-4). 5. Use ‘ ’ and ‘ ’ buttons (d.H.W temperature setting) to modify...

  • Page 37

    Maintenance instructions 33 parameter p03 – sets the central heating temperature to enter the parameters menu, follow the previously described procedure (see paragraph 5.2 ‘accessing the parameters menu’ - steps 1-4) . 5. Use ‘ ’ and ‘ ’ buttons (d.H.W temperature setting) to modify the value of the...

  • Page 38

    Maintenance instructions 34 parameter p06 – d.H.W priority function this parameter is used to maintain the diverter valve on d.H.W mode for a time equal to the post-circulation, keeping hot the secondary heat exchanger . To enter the parameters menu, follow the previously described procedure (see pa...

  • Page 39

    Maintenance instructions 35 parameter p09 – d.H.W/storage cylinder pump overrun timer this parameter is used to set the pump functioning time, in d.H.W mode, after closing the water tap . To enter the parameters menu, follow the previously described procedure (see paragraph 5.2 ‘accessing the parame...

  • Page 40

    Maintenance instructions 36 parameter p12 – sets the minimum fan speed (central heating) this parameter is used to set the minimum fan speed in heating mode, which corresponds to the minimum burner output during a heating mode request. To enter the parameters menu, follow the previously described pr...

  • Page 41

    Maintenance instructions 37 parameter p15 – legionella prevention function (for storage boilers only) to enter the parameters menu, follow the previously described procedure (see paragraph 5.2 ‘accessing the parameters menu’ - steps 1-4) . 5. Use ‘ ’ and ‘ ’ buttons (d.H.W temperature setting) to mo...

  • Page 42

    Maintenance instructions 38 parameter p17 – sets the temperature measurement unit this parameter is used to set the temperature measurement unit displayed: celsius ( ) or fahrenheit ( ) degrees. To enter the parameters menu, follow the previously described procedure (see paragraph 5.2 ‘accessing the...

  • Page 43

    Maintenance instructions 39 parameter p20 – central heating maximum set point this parameter is used to set the central heating maximum user set point. To enter the parameters menu, follow the previously described procedure (see paragraph 5.2 ‘accessing the parameters menu’ - steps 1-4) . 5. Use ‘ ’...

  • Page 44

    Maintenance instructions 40 parameter p23 – modulating pump minimum speed ( w/modulating pump and return temperature sensor connected only) this parameter is used to set the minimum modulating pump speed during a heating mode request. To enter the parameters menu, follow the previously described pro...

  • Page 45

    Maintenance instructions 41 5.4 gas data technical data tables 5.5 heating power (kw) – fan frequency (hz) diagram g20 g30 / g31 co 2 values gas type co 2 % natural gas - g20 9.18 liquid butan gas - g 30 10.3 liquid propane gas - g 31 10.3 frequency gas type minimum (hz) maximum central heating (hz)...

  • Page 46

    Maintenance instructions 42 5.6 converting the boiler to a 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 in accordance with current legislation and authorized by radiant ...

  • Page 47

    Maintenance instructions 43 6. Maintenance(authorised personnel) 6.1 general warnings all maintenance operations must be carried out by professionally qualified personnel, authorised by radiant bruciatori spa. The frequency of boiler maintenance must comply with current law and, nevertheless, should...

  • Page 48

    Maintenance instructions 44 6.3 accessing the boiler all maintenance and control operations require one or more of the boiler casing panels to be removed. The right-left side panels can be removed only after the front panel dismantling. Front panel: • remove the fixing screw placed on the top edge o...

  • Page 49

    Maintenance instructions 45 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. • wait for the boiler to cool down. • connect a hosepipe t...

  • Page 50

    Maintenance instructions 46 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...

  • Page 51

    Maintenance instructions 47 cleaning the d.H.W heat exchanger (see fig. 1) • close the shut-off valve and drain the domestic hot water circuit and central heating circuit of the boiler; • use a 4 mm allen key to unscrew the two screws securing the heat exchanger to the multiplex unit; • remove the h...

  • Page 52

    Maintenance instructions 48 positioning the ignition electrode and the ionisation electrode -+ 3.5 0.5 mm 1 m m -+ 9 8 + - 1 mm.

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    Maintenance instructions 49 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 suppl...

  • Page 54

    Maintenance instructions 50 electric fan (see fig. 1) • remove and dismantle the entire burner unit (see 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 washe...

  • Page 55

    Maintenance instructions 51 d.H.W heat exchanger (see fig. 1) • close the shut-off valve and drain the domestic hot water circuit and central heating circuit of the boiler. • use a 4 mm allen key to unscrew the four screws securing the heat exchanger to the multiplex unit. • remove the heat exchange...

  • Page 56

    Maintenance instructions 52 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 securing the motor body to the impeller body; • remove the motor body and check the condition of t...

  • Page 57

    Installation instructions 53 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; • remove and dismantle the entire burner unit (see 6.6.1 “cleaning the condensation module and burner...

  • Page 58

    Installation instructions 54 modulation circuit board (see fig. 1-2) • open the control panel (see 6.3 “accessing the boiler”); • disconnect all the connectors, unscrew the four fixing screws and remove the modulation circuit board; • replace the circuit board and re-assemble the components followi...

  • Page 59

    Installation instructions 55 11 10 9 8 7 1 2 1 3 1 4 1 5 1 6 1 7 m12 m9 m7 m5 m2 m4 m8 m10 m15 m16 1 2 3 4 57 61 60 59 58 4 4 4 3 4 2 4 1 4 0 3 9 3 8 3 7 3 6 3 5 3 4 3 3 3 2 3 1 3 0 2 9 2 8 2 6 2 7 ma ce ma ce n e c e m a ma gi bi gr +2 4v hs pw m gn d ev c ce ma ce ma ea vd vg tra n e c e n e m a m...

  • Page 60

    Installation instructions 56 t a b l n t a s e s e a ta cr se fig. 1 6.7 electrical connections (option) connect the power supply to the terminal board located onto the control panel as follows: a. Switch off the power supply at the main switch; b. Remove the front case panel of the boiler. (see par...

  • Page 61

    Installation instructions 57 svz srb miah4 n l sr pm ma ce ct tp bus+ gnd bus 0-10v wiring diagrams : key tp storage cylinder pre-heating timer option (only if parameter p00 = 2, 3 or 4) ct telephone control pm modulating pump sr heating sensor srb remote boiler lock-out indicator option svz zone va...

  • Page 62

    Installation instructions 58 6.8 troubleshooting to display the last 5 errors, keep pressed the ‘ ’ info button, in off mode position, for 5 seconds . The errors number will appear in chronological order (-1- = first fault… -5- = last fault). Use ‘ ’ and ‘ ’ buttons of heating temperature setting, t...

  • Page 63

    Installation instructions 59 6.9 function codes code function description f07 flue test function active (chimney-sweeper) pressing ‘ ’ button for 7 seconds the flue test function is enabled. Pressing the boiler off button the function is disabled. The flue test function operates the boiler at the ma...

  • Page 64

    Installation instructions 60 6.10 parts list main components code description 20047la 20-plate d.H.W heat exchanger 20051la cylinder 14 lt. - stainless steel 24053la pump ups 15-60 ciao 3v. 25-00131 3 bar pressure relief valve -htg circuit 25-00196 water pressure gauge 27044la condensate trap 30-000...

  • Page 65

    Installation instructions 61 25-00131 96018la 26133la 83546lp 43150la 54022la 54022la 64128la 43150la 26127la 43151la 64106la 54023la 64075la 64123la 43276la 43248la 54032la 64124la 33027la 61004lp 43139la 89116na 89122na 64069la 54022la 64126la 64066la 43135la 43145la 96032la 25-00196 43150la 43159...

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    Radiant bruciatori s.P.A. Via pantanelli, 164/166 - 61025 loc. Montelabbate (pu) tel. +39 0721 9079.1 • fax. +39 0721 9079279 e-mail: info@radiant • internet: http://www.Radiant.It the technical data and measurements are provided for information purposes only and are not binding. The company reserve...