Your RADIANT R2KA 24 /20 2V is a gas- fired wall hung high efficiency boiler, which generates heat for hot water production and or heating. R2KA 24 /20 2V boiler can be operated together with a domestic hot water cylinder, which stores a larger volume of hot water. This boiler is fitted with internal hot water production and a domestic hot water cylinder to achieve increased hot water convenience.

  1. Hot water production
  2. Tips
    1. Yearly or before the start of the heating season
  3. Functions of R2K Boiler
    1. More about FAST H2O Function
  4. DIGITECH CS PARAMETERS TABLE
  5. FAULT SIGNALLING CODES
  6. INFO MENU DISPLAY DATA

Hot water production

When you open a hot water tap sink, shower, bath, etc, the boiler operates automatically and supplies hot water at a temperature set by you. The boiler automatically stops producing hot water. when you close the hot water tap.

Tips

To ensure your system operates properly, have it professionally serviced once a year before the start of the heating season.

Yearly or before the start of the heating season

  • Regularly check the pressure displayed by the pressure gauge.
  • Make sure the valve is properly closed after filling.
  • Check the charge of the thermostat batteries.
  • Contact a technician for maintenance and cleaning.

Functions of R2K Boiler

Not to be confused as an error, this Boiler signal different active functions like:

  • F08 Heating Anti-freeze: In case of extremely low temperature, expecially if the boiler is installed outside, this function provide an Heating procedure. Wait until the operation is done
  • F33 Air Release Cycle: The R2K Boiler try in the next 2 minutes to release all air in the system, this occur generally when you
  • FH Fast H20: You can activate or deactivate this function by holding simultaneously for 7 seconds the and buttons of the domestic circuit.

More about FAST H2O Function

The Fast H20 function of the Radiant R2K 24 Boiler provide a constant temperature in the DHW Circuit, according to the temperature setted by the user.

This Functionality can:

  • Lower the time needed to provide the hot water to the faucet.
  • Avoid the delay and increare the comfort of th final user

DIGITECH CS PARAMETERS TABLE

DOMESTIC CIRCUIT PRESERVATION FUNCTION
(ONLY FOR ISTANTANEOUS BOILERS)
THROUGH THIS PARAMETER YOU CAN PRESERVE THE CIRCULATOR THE DIVERTER VALVE IN DOMESTIC POSITION FOR A PERIOD OF TIME EQUAL TO THE POST-CIRCULATION (SEE PARAMETER P09), SO AS TO MAINTAIN THE SECONDARY EXCHANGER HOT DOMESTIC FAN MAXIMUM SPEED ADJUSTMENT
THROUGH THIS PARAMETER YOU CAN SET THE FAN MAXIMUM SPEED IN DOMESTIC PHASE, THAT CORRESPONDS TO THE MAXIMUM BURNER POWER DURING A REQUEST TO OPERATE IN DOMESTIC MODE.
THE VALUE IS PRE-SET BASED ON THE SET POWER (SEE PARAMETER P00) AND ON THE GAS TYPE (SEE PARAMETER P02)
PAR. DESCRIPTION RANGE FUNCTION
P00 BOILER MODEL SELECTION 0 - 10
  • 0 = 13 KW
  • 1 = 18 KW (HEAT.) / 24 KW (DOMESTIC)
  • 2 = 25 KW
  • 3 = 28 KW
  • 4 = 34 KW
  • 5 = 55 KW
  • 6 = 100 KW
  • 7 = R1K 18_24-R2K 24-R2KA 24 (IN ALL VERSIONS)
  • 8 = R1K 25_28-R2K 28-R2KA 28 (IN ALL VERSIONS)
  • 9 = R1K 34-R2K 34-R2KA 34 (IN ALL VERSIONS)
  • 10 = R1K 50
P01 BOILER TYPE SELECTION 0 - 5
  • 0 = ISTANTANEOUS R2K
  • 1 = ISTANTANEOUS RKR
  • 2 = ACCUMULATION
  • 3 = ACCUMULATION COMFORT
  • 4 = ISTANTANEOUS COMFORT - FAST H2O
  • 5 = HEATING ONLY
P02 GAS TYPE SELECTION
ATTENTION:
READ THE INSTRUCTION IN CHAPTER ‘GAS TRANSFORMATION’
BEFORE CHANGING THIS PARAMETER		 0 - 1
  • 0 = METHANE
  • 1 = LPG
P03 SETTING THE HEATING TEMPERATURE
IN CASE THE BOILER IS INSTALLED AS PART OF A LOW TEMPERATURE CIRCUIT, PLEASE INSTALL A SAFETY THERMOSTAT ON THE HEATING FLOW, WHICH CAN STOP THE BOILER ACTIVITY IN CASE OF HIGH HEATING FLOW TEMPERATURE. THE COMPANY ASSUMES NO LIABILITY FOR DAMAGE CAUSED TO PERSONS OR FOR FAILURE TO COMPLY WITH THESE INSTRUCTIONS		 0 - 1
  • 0 = STANDARD (30-80 °C) (SET BY DEFAULT)
  • 1 = REDUCED (25-45 °C) FOR FLOOR SYSTEMS
P04 HEATING RUN-UP
THROUGH THIS PARAMETER YOU CAN SET THE TIME, DURING START-UP PHASE, NECESSARY FOR THE BOILER TO REACH THE MAXIMUM SET POWER (ON THE HEATING SIDE)		 0 - 4
  • 0 = (DISABLED)
  • 1 = 50 SECONDS (SET BY DEFAULT)
  • 2 = 100 SECONDS
  • 3 = 200 SECONDS
  • 4 = 400 SECONDS
P05 ANTI-WATER HAMMER SELECTION
ONCE THIS FUNCTION IS ENABLED, THE DHW CONTACT WILL BE DELAYED FOR A TIME EQUAL TO THE SET VALUE		 0 - 20
  • 0 = DISABLED
  • 1 - 20 = THE VALUE IS EXPRESSED IN SECONDS
P06

0 - 1
  • 0 = DISABLED (SET BY DEFAULT)
  • 1 = ENABLED
P07 HEATING TIMING
THROUGH THIS PARAMETER YOU CAN SET THE MINIMUM TIME FOR WHICH THE BURNER WILL BE TURNED OFF ONCE THE HEATING TEMPERATURE REACHED THE USER SET TEMPERATURE		 0 - 90 VALUE EXPRESSED IN MULTIPLES OF 5 SECONDS (PRE-SET AT 36 X 5 = 180 SECONDS)
P08 POST-CIRCULATION HEATING TIMING
THROUGH THIS PARAMETER YOU CAN SET THE PUMP DURATION OF OPERATION DURING HEATING CYCLE, AFTER THE MAIN BURNER TURNS OFF DUE TO THE ENVIRONMENT THERMOSTAT		 0 - 90 VALUE EXPRESSED IN MULTIPLES OF 5 SECONDS (PRE-SET AT 36 X 5 = 180
SECONDS)
P09 POST-CIRCULATION DOMESTIC / BOILER TIMING
THROUGH THIS PARAMETER YOU CAN SET THE PUMP OPERATION DURATION ON THE DOMESTIC CIRCUIT, AFTER THE TAP IS CLOSED		 0 - 90 VALUE EXPRESSED IN MULTIPLES OF 5 SECONDS (PRE-SET AT 24 X 5 = 120
SECONDS)
P10 DOMESTIC FAN MINIMUM SPEED ADJUSTMENT
THROUGH THIS PARAMETER YOU CAN SET THE FAN MINIMUM SPEED IN DOMESTIC PHASE, THAT CORRESPONDS TO THE MINIMUM BURNER POWER DURING A REQUEST TO OPERATE IN DOMESTIC MODE.
THE VALUE IS PRE-SET BASED ON THE SET POWER (SEE
PARAMETER P00) AND ON THE GAS TYPE (SEE PARAMETER
P02)		 45 - VALUE SET FOR PARAMETER P11 THE VALUE IS EXPRESSED IN HERTZ
(1HZ = 30 RPM)
P11 45 - VALUE SET FOR PARAMETER P11 THE VALUE IS EXPRESSED IN HERTZ
(1HZ = 30 RPM)
P12 HEATING FAN MINIMUM SPEED ADJUSTMENT
THROUGH THIS PARAMETER YOU CAN SET THE FAN MINIMUM SPEED IN HEATING PHASE, THAT CORRESPONDS TO THE MINIMUM BURNER POWER DURING A REQUEST TO OPERATE IN HEATING MODE. [SEE CHAPTER ‘HEAT CAPACITY DIAGRAM
(KW) – ELECTRIC FAN FREQUENCY (HZ)’].
THE VALUE IS PRE-SET BASED ON THE SET POWER (SEE PARAMETER P00) AND ON THE GAS TYPE (SEE PARAMETER P02)		 45 - VALUE SET FOR PARAMETER P13 THE VALUE IS EXPRESSED IN HERTZ
(1HZ = 30 RPM)
P13 HEATING FAN MAXIMUM SPEED ADJUSTMENT
THROUGH THIS PARAMETER YOU CAN SET THE FAN MAXIMUM SPEED IN HEATING PHASE, THAT CORRESPONDS TO THE MAXIMUM BURNER POWER DURING A REQUEST TO OPERATE IN HEATING MODE [SEE CHAPTER ‘HEAT CAPACITY DIAGRAM
(KW) –ELECTRIC FAN FREQUENCY (HZ)’].
THE VALUE IS PRE-SET BASED ON THE SET POWER (SEE PARAMETER P00) AND ON THE GAS TYPE (SEE PARAMETER P02)		 VALUE SET FOR PARAMETER P12 - 203 THE VALUE IS EXPRESSED IN HERTZ
(1HZ = 30 RPM)
P14 STARTING STEP ADJUSTMENT
THROUGH THIS PARAMETER YOU CAN SET THE FAN SPEED DURING START-UP THE VALUE IS PRE-SET BASED ON THE SET POWER (SEE PARAMETER P00) AND ON THE GAS TYPE (SEE PARAMETER P02)		 VALUE SET FOR PARAMETER P10 - 203 THE VALUE IS EXPRESSED IN HERTZ
(1HZ = 30 RPM)
P15 ANTI-LEGIONELLA FUNCTION (FOR STORAGE BOILERS ONLY)
THROUGH THIS PARAMETER YOU CAN ACTIVATE/DEACTIVATE THE “ANTILEGIONELLA” HEAT TREATMENT OF THE STORAGE TANK. EVERY 7 DAYS THE WATER TEMPERATURE INSIDE THE STORAGE IS HEATED BEYOND 60 °C THUS GENERATING
A BURNING HAZARD. KEEP UNDER CONTROL SUCH
DOMESTICH HOT WATER TREATMENT (AND INFORM THE USERS) TO AVOID UNFORSEEABLE DAMAGES TO PERSONS, ANIMALS AND PROPERTY. A THERMOSTATIC VALVE SHOULD BE INSTALLED AT THE DOMESTIC HOT WATER OUTLET TO
AVOID ANY BURNS		 0 - 1
  • 0 = DISABLED
  • 1 = ENABLED (PRE-SET BY DEFAULT ON STORAGE BOILERS ONLY)
P16 CLIMATE COMPENSATION CURVE
(ONLY WITH EXTERNAL PROBE CONNECTED)
YOU CAN CONNECT AN EXTERNAL TEMPERATURE PROBE (SEE CHAPTER ‘ELECTRICAL CONNECTIONS’) THAT AUTOMATICALLY CHANGES THE DELIVERY TEMPERATURE BASED ON THE EXTERNAL MEASURED TEMPERATURE. THE NATURE OF THE CORRECTION DEPENDS ON THE THERMOADJUSTMENT VALUE KD SET (SEE CHART).
THE SELECTION OF THE CURVE IS DETERMINED BY THE MAXIMUM DELIVERY TEMPERATURE TM AND THE MINIMUM EXTERNAL TEMPERATURE TE TAKING INTO ACCOUNT THE HOUSE INSULATION DEGREE.
THE VALUES OF THE DELIVERY TEMPERATURES TM, REFER
TO STANDARD SYSTEMS 30-80 °C OR FLOOR SYSTEMS 25-45
°C. THE SYSTEM TYPE CAN BE SET FROM PARAMETER P03		 0 - 30 (SET BY DEFAULT AT 15) THE NUMBERING OF THE VALUE CORRESPONDS TO ‘KD’ CURVES ON THE CHART (SEE CHART BELOW).
P17 DISABLEMENT OF DOMESTIC HOT WATER LINE BY MEANS OF SWITCH (ONLY FOR FAST BOILERS)
BY ENABLING THIS PARAMETER IN THE PRESENCE OF A CONNECTION (FOR EXAMPLE A BOILER CLOCK OR A TEMPERATURE THERMOSTAT) ON BOILER CLOCK SWITCH ON THE BOARD, THE REQUEST FOR BURNER IGNITION ON THE DOMESTIC HOT WATER LINE WILL BE DISABLED UPON BOILER CLOCK SWITCH CLOSURE.
EXAMPLE 1: WITH THE BOILER CLOCK SWITCH OPEN, UPON THE REQUEST FOR DOMESTIC HOT WATER, THE FLOW SWITCH AND THE BOILER WILL TURN ON.
EXAMPLE 2: WITH THE BOILER CLOCK SWITCH CLOSE, UPON THE REQUEST FOR DOMESTIC HOT WATER, THE FLOW SWITCH AND THE BOILER WILL NOT TURN ON		 0 - 1
  • 0 = DISABLED (SET BY DEFAULT)
  • 1 = ENABLED
P18 ENABLING BUS INDUSTRIAL PILOTING 0 -10V
THROUGH THIS PARAMETER YOU CAN ENABLE OR DISABLE THE BUS INDUSTRIAL INPUT 0-10 V TO SET THROUGH EXTERNAL BUS THE BURNER POWER OR THE DELIVERY TEMPERATURE.		 0 - 2
  • 0 = DISABLED (SET BY DEFAULT)
  • 1 = TEMPERATURE CONTROL MODE
  • 2 = POWER CONTROL MODE
P19 MINIMUM HEATING SETPOINT
THROUGH THIS PARAMETER YOU CAN SET THE USERADJUSTABLE MINIMUM HEATING TEMPERATURE.		 20 - 40 THE VALUE IS EXPRESSED IN °C
P20 MAXIMUM HEATING SETPOINT
THROUGH THIS PARAMETER YOU CAN SET THE USERADJUSTABLE MAXIMUM HEATING TEMPERATURE		 40 - 90 THE VALUE IS EXPRESSED IN °C
P21 MAXIMUM DOMESTIC SETPOINT
THROUGH THIS PARAMETER YOU CAN SET THE USERADJUSTABLE MAXIMUM DOMESTIC TEMPERATURE.		 45 - 75 THE VALUE IS EXPRESSED IN °C
P22 SET POINTT DELIVERY-RETURN
(ONLY WITH MODULATING PUMP AND RETURN PROBE CONNECTED)
THROUGH THIS PARAMETER YOU CAN SET THE TEMPERATURE DIFFERENCE BETWEEN DELIVERY AND RETURN

0

10 - 40
  • 0 = DISABLED
  • THE VALUE IS EXPRESSED IN °C
P23 MODULATING PUMP MINIMUM SPEED
(ONLY WITH MODULATING PUMP AND RETURN PROBE CONNECTED)
THROUGH THIS PARAMETER YOU CAN SET THE MINIMUM SPEED VALUE OF THE MODULATING PUMP DURING A REQUEST TO OPERATE IN HEATING MODE		 50 - 70 THE VALUE IS EXPRESSED IN PERCENTAGE
P24 MODULATING PUMP MAXIMUM SPEED
(ONLY WITH MODULATING PUMP AND RETURN PROBE CONNECTED)
THROUGH THIS PARAMETER YOU CAN SET THE MAXIMUM SPEED VALUE OF THE MODULATING PUMP DURING A REQUEST TO OPERATE IN HEATING MODE		 70 - 100 THE VALUE IS EXPRESSED IN PERCENTAGE
P25 D.H.W STORAGE TANK TEMPERATURE SETPOINT
(FOR STORAGE BOILERS ONLY)
THROUGH THIS PARAMETER YOU CAN SET THE PRIORITY STARTING VALUE OF THE STORAGE TANK, COMPARED TO THE USER ADJUSTABLE D.H.W SETPOINT		 3 - 9 THE VALUE IS EXPRESSED IN °C (PRE-SET AT 9°C)

FAULT SIGNALLING CODES

CODE FAULT POSSIBLE CAUSE SOLUTION RESET
E01 FLAME BLOCK
  • NO FLAME FIGHT UP
  • GAS MISSING
  • MASS OR BROKEN START-UP UP ELECTRODE
  • GAS VALVE BROKEN
  • FLOW LIGHT UP TOO LOW ADJUSTMEN
  • VALVE INFEED PRESSURE TOO GIGH (ONLY FOR GPL BOILERS)
  • -
  • CHECK THE ADDUCTION NETWORK
  • REPLACE IT
  • REPLACE IT
  • ADJUST MINIMUM OR SLOW LIGHT UP
  • CHECK THE MAXIMUM ADJUSTMENT PRESSURE
 MANUAL RESET (PRESS R KEY )
E02 SAFETY THERMOSTAT (95°C)
  • THEMOSTAT CABLE DISCONNECTED
  • BROKEN THERMOSTAT
  • CHECK THE WIRING
  • REPLACE IT
 AUTOMATIC
E03 FUMES SAFETY THERMOFUSE (102°C)
  • THERMOFUSE BROKEN
  • THERMOFUSE CABLE DISCONNECTED
  • REPLACE IT
  • CHECK THE WIRING
 MANUAL RESET (PRESS THE RESET R KEY)
E04 WATER MISSING IN THE SYSTEM
  • INSUFFICIENT WATER PRESSURE INSIDE THE SYSTEM (LOWER THEN 0.3BAR)
  • WATER PRESSURE SWITCH CABLE DISCONNECTED
  • WATER PRESSURE SWITCH BROKEN
  • LOAD THE SYSTEM
  • CHECK THE WIRING
  • REPLACE IT
 AUTOMATIC
E05 HEATING PROBE
  • BROKEN OR INCORRECTLY CALIBRATED PROBE (RESISTANCE VALUE 10 KOHM AT 25 °C NTC)
  • DISCONNECT OR WET PROBE CONNECTOR
  • REPLACE IT
  • CHECK THE WIRING
 AUTOMATIC
E06 DOMESTIC CIRCUIT PROBLE
  • BROKEN OR INCORRECTLY CALIBRATED PROBE (RESISTANCE VALUE 10 KOHM AT 25°C NTC)
  • DISCONNECTED OR WER PROBE CONNECTOR
  • REPLACE IT
  • CHECK THE WIRING
 AUTOMATIC
E15 RETURN PROBE
  • BROKEN OR INCORRECTLY CALIBRATED PROBE (RESISTANCE VALUE 10 KOHM AT 25°C NTC)
  • DISCONNECTED OR WER PROBE CONNECTOR
  • REPLACE IT
  • CHECK THE WIRING
 AUTOMATIC
E16 ELECTRIC FAN
  • ELECTRIC FAN BOARD BROKEN
  • ELECTRIC FAN BROKEN
  • FAULTY POWER SUPPLY CABLE
  • REPLACE IT
  • REPLACE IT
  • REPLACE IT
 AUTOMATIC
E18 INSUFFICIENT CIRCULATION
  • EXCHANGER OBSTRUCTED
  • CIRCULATION BROKEN OR DIRTY IMPELLER
  • CLEAN OR REPLACE THE EXCHANGER
  • CLEAN THE IMPELLER OR REPLACE THE CIRCULATOR
 AUTOMATIC
E21 GENERAL INTERNAL BOARD ERROR INCORRECT SIGNAL RECOGNITION BY THE MODULATION BOARD MICRO-PROCESSOR IF THE MODULATION BOARD DOES NOT RESET THE ERROR AUTOMATICALLY, REPLACE IT AUTOMATIC
E22 PARAMETER PROGRAMMING REQUEST MICRO=PROCESSOR MEMORY LOSS PARAMETERS REPROGRAMMING MANUAL RESET (CUT OF THE TENSION)
E35 RESIDUAL FLAME
  • FAULTY DETECTION ELECTRODE
  • FAULTY DETECTION ELECTRODE CABLE
  • FAULTY MODULATION BOARD
  • CLEAN OR REPLACE IT
  • REPLACE IT
  • REPLACE IT
 MANUAL RESET (PRESS R KEY)
E40 SUPPLY VOLTAGE SUPPLY VOLTAGE OFF THE OPERATION RANGE (d160 VOLTS) CHECK THE POWER SUPPLY NETWORK (THE ERROR DEACTIVATES AUTOMATICALLY AS SOON AS THE
SUPPLY VOLTAGE FALLS BACK WITHIN THE REQUESTED LIMITS).		 AUTOMATIC

INFO MENU DISPLAY DATA

To view the boiler data from info menu you just have to press the INFO key. The info code will be displayed on the left side of the screen and its relative value will be displayed on the centre of the screen.
Use keys ‘ + ’ and ‘ - ’ of the heating circuit to scroll through the list of displayed data. To exit display mode press the INFO ‘ i ’ key.

INFO CODE DESCRIPTION
D0 DOMESTIC CIRCUIT PROBE TEMPERATURE
D1 EXTERNAL PROBE TEMPERATURE
D2 FAN SPEED
D3 BOTTOM AREA PROBE TEMPERATURE [IF AREA BOARD INSTALLED]
D4 RETURN PROBE TEMPERATURE
D5 SOLAR COLLECTOR TEMPERATURE [IF SOLAR BOARD INSTALLED] (SCS)
D6 SOLAR BOILER TEMPERATURE (BOTTOM) [IF SOLAR BOARD INSTALLED] (SBSI)
D7 SOLAR BOILER TEMPERATURE (TOP) [IF SOLAR BOARD INSTALLED] (SBSS)
D8 SOLAR COLLECTOR PROBE TEMPERATURE 2 [IF SOLAR BOARD INSTALLED] (SCS2)
D9 EXTRA SOLAR BOILER TEMPERATURE [IF SOLAR BOARD INSTALLED] (SBS3)