Radiant R2K 34 RAIN Mounting instructions

R2K 34 RAIN - RAD - ING - Man.Ut. - 1901.1_firm.L224C_AHS
Use Manual for model
Condensing boiler, with integrated heat
exchanger for domestic hot water side,
suitable for outdoor installation
R2K 34 RAIN

R2K 34 RAIN_Man.Ut._AHS_EN
Contact Details
Office Address: 10 Frankston Gardens Drive,
Carrum Downs, Victoria, Australia, 3201
Email Address: [e-mail]
Website: www.hydronicsupplies.com.au
Phone: [phone]
Fax: [phone]

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R2K 34 RAIN - RAD - ING - Man.Ut. - 1901.1_firm.L224C_AHS
R2K 34 RAIN_Man.Ut._AHS_EN
TABLE OF CONTENTS
TABLE OF CONTENTS
1. USER SECTION 5
1.1. USE 6
1.1.1. GENERAL USE WARNINGS 6
1.1.2. CONTROL PANEL 7
1.1.3. DISPLAY ICONS 8
1.1.4. INFO MENU DISPLAY DATA 9
1.1.5. START-UP 10
1.1.6. OPERATING MODE 10
1.1.7. INFORMATIONAL NOTE ON ANTI-FREEZE FUNCTION 11
1.1.8. SYSTEM FILLING 12
1.1.9. FAULT SIGNALLING CODES 13
1.1.10. ACTIVE FUNCTIONS SIGNALLING CODES 15
1.1.11. FAST H2O FUNCTION 15
1.1.12. MAINTENANCE 16
1.1.13. COVER CLEANING 16
1.1.14. DISPOSAL 16

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R2K 34 RAIN - RAD - ING - Man.Ut. - 1901.1_firm.L224C_AHS
R2K 34 RAIN_Man.Ut._AHS_EN
TABLE OF CONTENTS

The operations described in this section are addressed to
all those who will use the machine. The machine must be
used and accessed only by qualified operators that fully
read and understood the User section, paying particular
attention to the warnings.
1. USER SECTION1. USER SECTION

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R2K 34 RAIN - RAD - ING - Man.Ut. - 1901.1_firm.L224C_AHS
3 Avvertenze generali per l'utilizzo_EN
3. USE
USER
1.1. USE
1.1.1. GENERAL USE WARNINGS
WARNING
Before starting the boiler the User must
make sure that the First start-up certificate has the
stamp of the technical Support Centre proving the
testing and the first start-up of the boiler.
WARNING
To validate the warranty, the boiler must
be started by a technical Support Centre authorized
by RADIANT no later than 30 days from the date of
installation.
WARNING
In order to take advantage of the guarantee
provided by the manufacturer, the customer should
carefully and exclusively observe the instructions
given in the USER section of the manual.
ATTENTION
This machine may be used only for the
purpose for which it has been designed: heat water
to a temperature below boiling point at atmospheric
pressure. Any other use is considered wrong and
dangerous. The manufacturer is excluded from
any contractual or out of contract responsibility for
damage caused to people, animals or property due to
incorrect use.
DANGER
The boiler should not be used by persons
(including children) with reduced physical, sensory or
mental capacities or without suitable knowledge or
experience unless they are instructed on the device
use or monitored by a person responsible for their
safety.
DANGER
DO NOT obstruct the air vents of the
location in which the gas device is installed to prevent
the formation of toxic explosive mixes.
DANGER
If you sense a gas odour in the location in
which the boiler is installed, proceed as follows:
› DO NOT use electrical switches, the telephone or
any other device that might generate electrical
discharges or sparks;
› Immediately open all doors and windows to
create an air exchange that can quickly clean the
location;
› Close the gas valves;
› Request immediate intervention of qualified
staff.
DANGER
The use of the electrical power boiler
implies respecting some fundamental rules such as:
› DO NOT touch the device with wet and/or humid
parts and/or with bare feet;
› DO NOT pull the electrical cables;
› DO NOT leave the device exposed to atmospheric
agents (rain, sun, etc.) unless specifically
intended;
› in case of cable damage, turn off the device and
contact qualified professional staff to replace it.

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R2K 34 RAIN - RAD - ING - Man.Ut. - 1901.1_firm.L224C_AHS
3Pannellocomandi_combinata_MIAH4_R2_G_EN
3. USE
USER
1.1.2. CONTROL PANEL
KEY
1. HEATING TEMPERATURE ADJUSTMENT KEYS
2. INFO KEY: PRESS ONCE TO VIEW THE
TEMPERATURES AND OTHER INFORMATION
(see chapter ‘INFO MENU DISPLAY) - HOLD
FOR 5 SECONDS, IN OFF OPERATING MODE,
TO VIEW THE LAST 5 FAULTS
3. OPERATING MODE SELECTION KEY: SUMMER
/ ONLY HEATING / WINTER / OFF
4. RESET KEY: FAULTS RESET - CHIMNEY
SWEEP FUNCTION ACTIVATION (HOLD FOR 7
SECONDS)
5. DOMESTIC HOT WATER TEMPERATURE
ADJUSTMENT KEY / HOLD THE KEYS AT THE
SAME TIME FOR 5 SECONDS TO ACTIVATE
DISPLAY BACK LIGHT FOR 10 MINUTES
6. DISPLAY
5
1
6
2 3 4

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R2K 34 RAIN - RAD - ING - Man.Ut. - 1901.1_firm.L224C_AHS
3 Icone del display_combinata_MIAH4_EN
3. USE
USER
1.1.3. DISPLAY ICONS
KEY
1. INDICATION OF PARAMETER NUMBER OR
DISPLAYED INFO CODE
2. PARAMETERS PROGRAMMING FUNCTION
ACTIVE
3. SIGNALLING CONNECTED SOLAR BOARD /
SOLAR COLLECTOR TEMPERATURE DISPLAY
(d5)
4. SOLAR PUMP ACTIVE
5. BOILER LOWER TEMPERATURE DISPLAY (d6)
/ BOILER UPPER TEMPERATURE DISPLAY (d7)
6. EXTERNAL PROBE INSTALLED / EXTERNAL
PROBE TEMPERATURE (d1)
7. TEMPERATURE DISPLAY / SET POINT /
PARAMETER VALUE
8. OPEN THERM COMMUNICATION PRESENT
(REMOTE CONTROL / AREA CONTROL UNIT)
9. INSUFFICIENT SYSTEM WATER PRESSURE
SIGNALLING
10. FLAME PRESENT SIGNALLING / IT ALSO
INDICATES, ON 3 PERCENTAGE LEVELS, THE
MODULATING POWER LEVEL OF THE BOILER
(fig.2)
11. OPERATION IN DOMESTIC MODE ENABLED
12. ERROR DISPLAY THAT CAN BE RESET
13. OFF OPERATING MODE
14. ERROR DISPLAY THAT CAN NOT BE RESET
15. OPERATION IN HEATING MODE ENABLED
456 7
9
10
11
121314
15
1
2
38
≤ 33% >33%<66% >66%<100%
fig. 1
fig. 2

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R2K 34 RAIN - RAD - ING - Man.Ut. - 1901.1_firm.L224C_AHS
3VisualizzazionidelmenùInfo_MIAH4_firm.L224C_EN
3. USE
USER
1.1.4. 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 ‘ ’ key.
LIST OF DISPLAYED DATA
INFO CODE ICON 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)
dA INERTIAL STORAGE SENSOR TEMPERATURE
dB LOW-TEMPERATURE HEATING CIRCUIT RETURN SENSOR TEMPERATURE (IN HYBRID SYSTEM BOX
MODE) - HEATING PUMP RETURN SENSOR TEMPERATURE (IN HYBRID DOMESTIC SYSTEM MODE)
dC HYBRID SYSTEM BOX D.H.W. TANK SENSOR TEMPERATURE - HOT WATER TEMPERATURE OUT OF
THE REMOTE TANK TO THE BOILER (ONLY FOR HYBRID DOMESTIC SYSTEM WITH OPTIONAL SENSOR)
dD POWER SUPPLIED BY THE HEATING PUMP IN KW/H (ONLY FOR HYBRID DOMESTIC SYSTEM)
dE HEATING FLOW RATE DISPLAY EXPRESSED IN L/MIN (IF THERE IS A FLOWMETER).

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3Accensione_Modalitàdifunzionamento_Antigelo_MIAH4_MIAH6_EN
3. USE
USER
1.1.5. START-UP
Before starting the boiler make sure that it is
powered and that the gas tap below the boiler is
open.
To start the boiler press the function key ‘ ’ and
select the desired operating mode. If the symbol
is displayed fixed, it means that the function was
activated.
1.1.6. OPERATING MODE
SUMMER MODE
In this mode the boiler meets only the demands of
domestic hot water.
To switch the boiler to SUMMER operating mode,
press the function key ‘ ’, the symbol ‘ ’
will appear fixed on the display, indicating that the
function is enabled.
Whenever hot domestic water is needed the
automatic start-up system will start the burner;
this is indicated by displaying the symbol ‘ ’
blinking.
ONLY HEATING MODE
In this mode the boiler meets only the demands of
heating.
To switch the boiler to ONLY HEATING operating
mode, press the function key ‘ ’, the symbol ‘
’ will appear fixed on the display, indicating that
the function is enabled.
Whenever heating energy is needed to heat the
rooms the automatic start-up system will start the
burner; this is indicated by displaying the symbol ‘
’ blinking.
WINTER MODE
In this mode the boiler meets the demands of
heating and of domestic hot water.
To switch the boiler to WINTER operating mode,
press the function key ‘ ’, the symbols ‘
and ’ will appear fixed on the display, indicating
that the function is enabled.
Whenever heating energy and domestic hot water
are needed the automatic start-up system will
start the burner; this is indicated by displaying the
symbol ‘ and ’ blinking.
ADJUSTING THE HEATING TEMPERATURE
You can adjust the temperature using keys ‘ ’ and
‘’ of the heating circuit :
· press key ‘ ’ to decrease the temperature.
· press key ‘ ’ to increase the temperature.
The heating temperature adjustment field ranges
from 30 °C to 80 °C (25 °C – 45 °C for floor systems).
DOMESTIC HOT WATER TEMPERATURE
ADJUSTMENT
You can adjust the temperature using keys ‘ ’ and
‘’ of the domestic circuit :
· press key ‘ ’ to decrease the temperature.
· press key ‘ ’ to increase the temperature.
The hot domestic water temperature adjustment
field ranges from 35 °C to 60 °C.
OFF MODE
In this mode the boiler no longer meets the heating
and domestic hot water demands, the anti-freeze,

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R2K 34 RAIN - RAD - ING - Man.Ut. - 1901.1_firm.L224C_AHS
3Accensione_Modalitàdifunzionamento_Antigelo_MIAH4_MIAH6_EN
3. USE
USER
pump anti-locking and diverter valve anti-locking
systems still remain active.
To switch the boiler to OFF operating mode, press
the function key ‘ ’, the symbol ‘ ’ will
appear fixed on the display, indicating that the
function is enabled (for non condensing models
will appear the message ‘OFF’).
If the boiler was previously running, it will be turned
off and the post-ventilation and post-circulation
functions will be enabled.
If you have to deactivate the boiler for a long period
of time, proceed as follows:
› contact the Technical support centre that will
empty the water system, where no anti-freeze is
intended, and will cut off the power, water and
gas supply.
› Or leave the boiler in OFF operating mode
keeping active the electrical and gas supplies so
that the anti-freeze function may activate.
1.1.7. INFORMATIONAL NOTE ON
ANTI-FREEZE FUNCTION
The boiler is protected against freezing thanks to
the electronic board preparation with functions
that start the burner and heat the concerned parts
when their temperature goes below the minimum
pre-set values.
WARNING
This function is available only if:
› the boiler is powered;
› the gas supply is open;
› the pressure of the system is proper;
› the boiler is not blocked.

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R2K 34 RAIN - RAD - ING - Man.Ut. - 1901.1_firm.L224C_AHS
3Riempimentodell'impianto_MIAH4_R2KRAIN_EN
3. USE
USER
1.1.8. SYSTEM FILLING
To restore the water pressure inside the system
open the loading tap “R” (fig. 1) and make sure
using pressure gauge “M” (fig. 1), that the system
pressure reaches 1.2 bar (see fig. 2).
After performing this operation, make sure that the
loading tap “R” (fig. 1) is properly closed.
After the water pressure reset the boiler will
automatically perform a 2 minutes system relief
cycle. Throughout this function the display will
show the code “F33”. The boiler can work normally
only after completing the operation.
R
M
fig. 1
fig. 2

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R2K 34 RAIN - RAD - ING - Man.Ut. - 1901.1_firm.L224C_AHS
3Codicidisegnalazioneanomalie_combi_MIAH4_firm.L224C_EN
3. USE
USER
1.1.9. FAULT SIGNALLING CODES
The boiler might signal some faults by displaying a code. Below you have a list of the codes and of the
operations to be performed in order to unlock the boiler.
CODE ICON FAULT INTERVENTION
E01 FLAME BLOCK MAKE SURE THAT THE BOILER AND CONTACTOR GAS VALVES ARE
OPEN.
PRESS THE RESET ‘ ’ BUTTON ON THE CONTROL PANEL TO
RESET THE FAULT, AS SOON AS THE ERROR CODE DISAPPEARS
FROM THE DISPLAY, THE BOILER WILL START AUTOMATICALLY.
IF THE BLOCK PERSISTS CONTACT THE TECHNICAL SUPPORT
CENTRE.
E02 SAFETY THERMOSTAT (95 °C) CONTACT THE TECHNICAL SUPPORT CENTRE.
E03 FUMES SAFETY THERMOFUSE (102 °C) CONTACT THE TECHNICAL SUPPORT CENTRE.
E04 WATER MISSING IN THE SYSTEM IF THE SYSTEM PRESSURE IS BELOW 1.2 BAR, FILL THE SYSTEM
AS DESCRIBED IN CHAPTER “SYSTEM FILLING”.
IF THE BLOCK PERSISTS CONTACT THE TECHNICAL SUPPORT
CENTRE.
E05 HEATING PROBE CONTACT THE TECHNICAL SUPPORT CENTRE.
E06 DOMESTIC CIRCUIT PROBE CONTACT THE TECHNICAL SUPPORT CENTRE.
E10 LOW FLOW RATE CONTACT THE TECHNICAL SUPPORT CENTRE.
E15 RETURN PROBE CONTACT THE TECHNICAL SUPPORT CENTRE.
E16 ELECTRIC FAN CONTACT THE TECHNICAL SUPPORT CENTRE.
E18 INSUFFICIENT CIRCULATION CONTACT THE TECHNICAL SUPPORT CENTRE.
E21 GENERAL INTERNAL BOARD ERROR CUT OFF THE POWER SUPPLY FROM THE MAIN SWITCH AND
THEN RESTORE IT, AS SOON AS THE ERROR CODE DISAPPEARS,
THE BOILER WILL RESTART AUTOMATICALLY.
IF THE BLOCK PERSISTS CONTACT THE TECHNICAL SUPPORT
CENTRE.

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R2K 34 RAIN - RAD - ING - Man.Ut. - 1901.1_firm.L224C_AHS
3Codicidisegnalazioneanomalie_combi_MIAH4_firm.L224C_EN
3. USE
USER
CODE ICON FAULT INTERVENTION
E22 PARAMETERS PROGRAMMING REQUEST CUT OFF THE POWER SUPPLY FROM THE MAIN SWITCH AND
THEN RESTORE IT, AS SOON AS THE ERROR CODE DISAPPEARS,
THE BOILER WILL RESTART AUTOMATICALLY.
IF THE BLOCK PERSISTS CONTACT THE TECHNICAL SUPPORT
CENTRE.
E31 INCOMPATIBLE REMOTE CONTROL CONTACT THE TECHNICAL SUPPORT CENTRE.
E32 COMMUNICATION ERROR BETWEEN
THE BOILER BOARD AND THE MODBUS
BOARD
CONTACT THE TECHNICAL SUPPORT CENTRE.
E35 RESIDUAL FLAME PRESS THE RESET ‘ ’ BUTTON ON THE CONTROL PANEL TO
RESET THE FAULT, AS SOON AS THE ERROR CODE DISAPPEARS
FROM THE DISPLAY, THE BOILER WILL START AUTOMATICALLY.
E40 SUPPLY VOLTAGE CONTACT THE TECHNICAL SUPPORT CENTRE.
E52 COMMUNICATION FAULT BETWEEN
MODBUS CONTROLLER AND MODBUS
CONTROL UNIT
CONTACT THE TECHNICAL SUPPORT CENTRE.

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R2K 34 RAIN - RAD - ING - Man.Ut. - 1901.1_firm.L224C_AHS
3Codicidisegnalazionefunzioniattive_R2K_MIAH4_EN
3. USE
USER
1.1.10. ACTIVE FUNCTIONS
SIGNALLING CODES
CODE FUNCTION INTERVENTION
F08 HEATING ANTI-
FREEZE FUNCTION
ACTIVE
WAIT UNTIL THE OPERATION
IS COMPLETED
F09 D.H.W CIRCUIT
ANTI-FREEZE
FUNCTION ACTIVE
WAIT UNTIL THE OPERATION
IS COMPLETED
F33 SYSTEM AIR
RELEASE CYCLE IN
PROGRESS
WAIT UNTIL THE OPERATION
IS COMPLETED
FH FAST H2O YOU CAN ACTIVATE/
DEACTIVATED IT BY
HOLDING SIMULTANEOUSLY
AND FOR 7 SECONDS THE
RESET ‘ ’ AND ‘ ’ OF
THE DOMESTIC CIRCUIT
.
1.1.11. FAST H2O FUNCTION
TheFastH2Ofunctionkeepsaconstanttemperature
in the DHW circuit within the boiler, according to
the temperature set by the user.
The Fast H2O function offers three advantages:
› the hot water is immediately supplied at the
requested temperature.
› unnecessary delays are avoided by increasing
the comfort of the final user.
› water wastes are limited waiting that the water
reaches the right temperature.
To activate/deactivate the Fast H2O function please
follow the instruction indicated in the paragraph
‘ACTIVE FUNCTIONS SIGNALLING CODES’.

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R2K 34 RAIN - RAD - ING - Man.Ut. - 1901.1_firm.L224C_AHS
3 Manutenzione_Pulizia_Smaltimento_EN
3. USE
USER
1.1.12. MAINTENANCE
To ensure proper boiler safety and efficiency, please
contact RADIANT technical support network to
check the device every year.
An accurate maintenance should improve system
management.
1.1.13. COVER CLEANING
Clean the cover of the device using a wet cloth and
come neutral soap.
WARNING
DO NOT use abrasive or powder detergents
as they might damage the plastic cover and control
elements.
1.1.14. DISPOSAL
The boiler and all its accessories must be
differentiated, suitably disposed of in accordance
with the standards in force.
The use of the symbol WEEE
(Waste Electrical and Electronic
Equipment) shows that this
product can not be dismantled as domestic waste.
Proper dismantle of this product helps preventing
potentially negative consequences on human
health and environment.

RADIANT BRUCIATORI s.p.a.
Via Pantanelli, 164/166 - 61025 Loc. Montelabbate (PU)
Tel. [phone] • fax. [phone]
e-mail: info@radiant • Internet: http://www.radiant.it