Daikin ROTEX GW-20 H12 User manual

ROTEX • 4P374380 1D • 88554801 • 02/2016
4P374380 1D • 88554801 • 02/2016

3
TABLE OF CONTENTS
1 Safety instructions 5
2 Unit description 6
2.1 General ............................................................................................................................................................................................ 6
2.2 Functioning ...................................................................................................................................................................................... 6
2.3 Operating modes ............................................................................................................................................................................. 6
2.4 PC Interface .................................................................................................................................................................................... 8
2.5 est programs ................................................................................................................................................................................. 8
3 ain components 9
3.1 Accessories ................................................................................................................................................................................... 10
4 Installation 11
4.1 Installation measurements ............................................................................................................................................................ 11
4.2 Installation space ........................................................................................................................................................................... 13
4.3 Assembly ....................................................................................................................................................................................... 14
5 Connecting 16
5.1 Connecting CH installation ............................................................................................................................................................ 16
5.2 Connecting electronically .............................................................................................................................................................. 18
5.3 Connect room thermostat .............................................................................................................................................................. 19
5.4 Connecting gas ............................................................................................................................................................................. 20
5.5 Flue and air supply duct ................................................................................................................................................................ 21
5.6 Outlet systems ............................................................................................................................................................................... 22
5.7 Flue material .................................................................................................................................................................................. 23
5.8 Connection to a flue system without air inlet (B23, B33) .............................................................................................................. 25
5.9 Connection to a sealed flue system. ............................................................................................................................................. 26
6 Commissioning the unit and the Installation 34
6.1 Filling and air purge of unit and installation ................................................................................................................................... 34
6.2 Commissioning the unit ................................................................................................................................................................. 35
6.3 Switching off the unit ..................................................................................................................................................................... 36
7 Setting and adjustment 37
7.1 Direct via operating panel .............................................................................................................................................................. 37
7.2 Parameter settings via the service code ....................................................................................................................................... 38
7.3 Parameters .................................................................................................................................................................................... 38
7.4 Setting maximum CH power .......................................................................................................................................................... 40
7.5 Setting pump setting ...................................................................................................................................................................... 40
7.6 Weather dependent regulation ...................................................................................................................................................... 41
7.7 Conversion to different type of gas................................................................................................................................................ 42
7.8 Gas/air regulation .......................................................................................................................................................................... 42
7.9 Setting gas/air regulation ............................................................................................................................................................... 43
8 alfunctions 45
8.1 Show last malfunction ................................................................................................................................................................... 45
8.2 Malfunction codes ......................................................................................................................................................................... 45
8.3 Other faults .................................................................................................................................................................................... 46
9 aintenance 49
10 Technical specifications 51
10.1 echnical Product Fiche in accordance to CELEX-32013R0811 .................................................................................................. 52
10.2 N C resistances ............................................................................................................................................................................ 53
10.3 Electrical diagram .......................................................................................................................................................................... 54
11 Warranty conditions 55
© 2019 Rotex Heating Systems GmbH
All rights reserved.
he information provided applies to the product in its standard version. Rotex Heating Systems GmbH can therefore not be held liable for any damages arising from
any specifications of the product which deviate from the standard version. he available information has been compiled with the greatest possible care, but Rotex
Heating Systems GmbH can not be held liable for any mistakes in the information, or for any consequences thereof. Rotex Heating Systems GmbH cannot be held
liable for any damage arising from work carried out by third parties.
Subject to change.

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These installation instructions
With these installation instructions, you can safely assemble, install and maintain the
unit. Carefully follow the instructions.
In case of any doubt, please contact the manufacturer.
Keep the installation instructions near the unit.
Abbreviations and terms used
Description To be referred to as
Rotex RHOB12AAV1 H, RHOB18AAV1 H,
RHOB42AAV1H
Unit
Unit with piping for central heating CH installation
System with pipes for domestic hot water DHW installation
Symbols
he following symbols are used in this manual:
CAUTION
Procedures which - if they are not carried out with the
necessary care - may cause damage to the product, the
surroundings, the environment or injury.
I PORTANT
Procedures and/or instructions which, if they are not
followed, will have a negative effect on the functioning of the
unit.

5
Service and technical support for the installer
For information about specific settings, installation, maintenance and repair work, as an
installer, please contact your local Rotex dealer.
Identification of the product
You will find the unit details on the type plate on the bottom of the unit.
You will find the unit details on the data plate on the bottom of the unit.
he data plate contains, beside the supplier information and the boiler specification (boiler type
and model name) the following information:
******-yymm****** Product code-Serial No.
YY= year of production, mm = month of production
PIN Product Identification Number
Data related to Central Heating
Information regarding electrical power supply
Voltage, mains frequency, elmax, IP-class)
PMS Permissible overpressure in CH circuit in bar
Qn HS Input related to gross caloric value in kilowatts
Qn Hi Input related to net caloric value in kilowatts
Pn Output in kilowatts
BE, FR, I , PL, DE Countries of Destination (EN 437)
II2H3P, II2Esi3P,
I2E(S), I2E3P;
II2ELL3P
Approved unit categories (EN 437)
G20-20 mbar
G25-25 mbar
Gas group and gas connection pressure as set at the factory
(EN 437)
B23, …. C93(x) Approved flue gas category (EN 15502)
max Max. flow temperature in °C
IPX4D Electrical protection class
1SAFETY INSTRUCTIONS
I PORTANT
This product is intended for domestic use only.
he manufacturer Rotex Heating Systems GmbH accepts no liability for damage or
injury caused by the failure to (strictly) observe the safety instructions, or negligence
during the installation of the Rotex RHOB*A*V1H wall-mounted gas boiler and any
associated accessories.
his device is not intended for use by people (including children) with reduced
physical, sensory or mental abilities, or lack of experience and knowledge, unless they
are given supervision or instructions on the use of the device by a person who is
responsible for their safety.
he entire installation must meet the applicable local technical and (safety)
instructions, for the gas installation, the electrical installation, smoke extraction
installation, drinking water installation, and central heating installation.

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2UNIT DESCRIPTION
2.1 General
he Rotex RHOB*A*V1H wall-mounted gas boiler is a closed unit. he unit is intended
to provide heat to the water of a CH-installation and the domestic hot water installation.
he air supply and combustible gas outlet can be connected to the unit by means of
two separate pipes. A concentric connection can be supplied upon demand. he unit
was tested in combination with the combi feedthrough, but the unit may also be
connected to combi feedthroughs which meet the universal test standards for combi
feedthroughs.
he unit can be connected to an assembly bracket if required, a frame with top
connection, and various installation sets. hese are provided separately.
he Rotex RHOB*A*V1H wall-mounted gas boilers have the CE marking, electrical
protection class IPX4D
he unit is delivered for natural gas (G20) as a standard. On request, the unit can also
be provided for propane (G31).
2.2 Functioning
he Rotex RHOB*A*V1H wall-mounted gas boiler is a modulating high-efficiency boiler.
his means that the power is modulated to suit the required heat demand.
A copper CH circuit is integrated in the aluminum heat exchanger.
he water of the DHW installation can be heated by connecting the unit to an indirectly
heated tank using a three-way valve and tank sensor (see par.5.1 and 5.2). he built in
tank regulation of the unit ensures the domestic hot water provision takes precedence
over the heating. Both cannot work at the same time.
he unit is fitted with an electronic boiler controller, which operates the fan at every
heat requirement of the heating or the warm water supply, opens the gas valve, ignites
the boiler controller, and continuously monitors and regulates the flame, depending on
the requested power.
2.3 Operating modes
he operating mode of the unit is indicated by means of a code on the service display
of the operating panel.
- Off
he unit is not in operation, but is connected to the electricity supply. No response is
given to requests for domestic hot water or CH water. he unit frost protection is active.
his means that the pump will start running and the exchanger will be heated up if the
temperature of the water in the system drops too far.
If the frost protection intervenes, the code 7 will be displayed (heating up exchanger).
he pressure in the CH installation can also be read from the temperature display in
this operating mode (in bar).
Standby
he LED at the key is lit and possibly one of the LEDs of the tap comfort function.
he unit is ready to respond to a request for CH or tap water.
0 Post-running CH
After the end of the CH-operation, the pump will run for a specified time. he post-
pumping time is set to the value in par. 7.2 in its factory settings. his setting can be
changed. In addition to this, the pump will run automatically 1 time per 24 hours, for 10
seconds, in order to prevent it from getting stuck. his automatic switching on of the
pump takes place at the time of the last heating request. In order to change this, the
room thermostat needs to be set higher for a moment, at the required time of day.
1 Requested temperature reached
he boiler controller may temporarily block the heat request. he boiler controller will
then be stopped. he block occurs because the required temperature has been
reached. When the temperature has sufficiently decreased, the block will be lifted.
2 Selftest
Once every 24 hours, the boiler controller tests the connected sensors. During the test,
the relay will not carry out any other tasks.

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3 Ventilating
When the unit is started, the fan is first brought up to its correct start rpm. When the
start rpm is reached, the boiler controller will be ignited. Code 3 is also visible when
there is post-fanning after the boiler controller is stopped.
4 Igniting
When the fan has reached the start rpm, the burner relay will be ignited by means of
electrical sparks. During the ignition, code 4 is displayed. If the boiler controller does
not ignite, a new attempt will be made after approximately 15 seconds. If after 4 ignition
attempts, the boiler controller has still not been ignited, the controller will go into down-
time.
5 CH operation
An on/off thermostat, an Open herm thermostat, an outdoor sensor or a combination
thereof can be connected to the controller (see par. 5.3 )
When there is a heat request from a thermostat, after the fan has started running (code
3 ), the ignition will take place (code 4 ) followed by the CH operating mode (code 5 ).
During CH operation, the rpm of the fan and therefore the power of the unit can be
adjusted so the temperature of the CH water to the required CH supply temperature can
be controlled. If an on/off thermostat has been connected, this will be the CH supply
temperature set on the display. In case of an Open herm thermostat, the required CH
supply temperature is determined by the thermostat. In case of an outdoor sensor, the
required CH supply temperature is determined by the fuel line programmed in the boiler
controller. For the last two situations, the temperature set on the display is the
maximum.
During CH operation, the requested CH supply temperature will be displayed on the
operating panel.
he CH supply temperature can be set between 30 and 90°C (see par. 7.1). Caution:
for a low temperature system, a lower maximum setting may be required than the
standard setting of 80°C.
You can press the service button during CH operation to read the actual CH supply
temperature.
If the tap comfort function is switched on (see code 7 ), an Open herm heatingrequest
of less than 40 degrees will be generated.

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6 Tap water operation
RHOB*A*V1H in combination with indirectly fired tank
he hot water supply takes precedence over the heating. When a tank sensor is used,
any CH request will be interrupted when the tank sensor detects a temperature of
5 degrees lower than the set value. After the fan has switched on (code 3 ) and there
has been an ignition (code 4 ), the boiler controller will switch to domestic water
operation (code 6 ). When a tank thermostat is used, the heat request will start when
the thermostat is opened, and it will end when the thermostat closes again. he
fanspeed, and therefore the power of the unit, is in that case controlled by the boiler
controller on the basis of a fixed leaving water temperature. he domestic hot water
temperature can be set between 40°C and 65°C. he set tank temperature is displayed
on the operating panel during domestic hot water operation. You can press the service
button during tap water operation to read the actual tank temperature.
2.4 PC Interface
he boiler controller is provided with an interface for a PC. A PC can be connected by
means of a dongle, and the associated software. his facility enables you to follow the
behavior of the boiler controller, the unit and the heat installation over a long period.
2.5 Test programs
here is an option in the burner relay, to bring the unit into a test status.
Activating a test program, will switch on the unit with a set fan rotations per minute,
without the control functions intervening.
he safety functions do remain active.
he test program is ended by pressing and simultaneously.
Test programs
Description of program Button combination Display reading
Burner on with minimum DHW
capacity (see parameter d par. 7.2) and “L”
Burner on with set maximum CH
power (see parameter 3 par. 7.2) and (1x) “h”
Burner on with maximum DHW power
(see parameter 3 par. 7.2) and (2x) “H”
Switching off test program and Current operation
situation
During test mode the following data can be read :
• By pressing the button continuously in the display the CH water pressure is shown.
• By pressing the button continuously in the display the ionisation current is shown.
2.5.1 Frost protection
•
he unit is fitted with frost protection in order to prevent it from
freezing. If the temperature of the heat exchanger drops too low, the
pump will start running until the temperature of the heat exchanger
is sufficiently high. If the frost protection intervenes, the code 7 will
be displayed (heating up exchanger).
•If the installation (or a part thereof) can freeze, the coldest place
should be fitted with an (external) frost thermostat on the return
pipe. his must be connected in accordance with the electrical
diagram (see par.10.3 ).
Note
When the unit is switched off ( - on the service display), the unit frost protection will
remain active, however a heating request from an (external) frost thermostat will be
ignored.

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3AIN CO PONENTS
A. CH pump K. Flue gas/air inlet concentric adapter
B. Gas valve L. Air supply (only when using twin pipe flue system)
C. Burner controller (incl. operating panel) M. Connection block / terminal strip X4
D. Sensor S1 (flow) N. Condensate collector
E. Sensor S2 (return) O. Siphon
F. Fan P. Heat exchanger
G. Pressure sensor central heating Q. Operating panel and display
H. Connection wire 230 V ~ R.
Ignition/ionization pin
I. Manual air bleed S. Position of data plate
J. Inspection glass
0207010009

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3.1 Accessories
Description Article numbers
B-pack small EKFJS*AA
B-pack middle EKFJ *AA
B-pack large EKFJL*AA
Valve kit EKVK4AA
Cover plate EKCP1AA
Outdoor sensor EKOSK1AA
3-way valve set EK3WV1AA
Flue gas adapter Concentric Ø 80x125 EKHY090717
Flue gas adapter Parallel 80 mm EKHY090707
Propane conversion set RHOB12AAV1 H EKPS075917
Propane conversion set RHOB18AAV1 H EKPS075867
Propane conversion set RHOB42AAV1H EKHY075787

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4INSTALLATION
4.1 Installation measurements
Unit with pipes connected downwards:
Unit + mounting bracket
A =
Supply CH
G ¾” (ext)
B =
Return CH
G ¾” (ext)
C =
Gas
G ½” (int)
D =
Condense outlet
Ø dn25 (flexible)
h =
517mm
RHOB
12
AAV1 H
&
RHOB18AAV1 H
637mm
RHOB42AA
V1
H
H =
590mm
RHOB
12
AAV1 H
&
RHOB18AAV1 H
710mm
RHOB42AA
V1
H
Z =
Flue gas outlet/air inlet
Ø60/100 (concentric)
020601005
161
161
450
240
77
135
h
D
130 130 77

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Unit connected to B-pack:
Unit + B-pack
A =
Supply CH
G ¾” (ext)
B =
Return CH
G ¾” (ext)
C =
Gas
G ½” (int)
D =
Condense outlet
Ø dn25 (flexible)
H
=
770mm
RHOB
12
AAV1 H
&
RHOB18AAV1 H
890mm
RHOB42AA
V1
H
Z =
Flue gas outlet/air inlet
Ø60/100 (concentric)
020601006
265
265
77
77
D
50 130 130

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4.2 Installation space
he unit must be installed against a wall with sufficient load bearing capacity.
In case of light wall constructions, there is a risk of resonance noises.
Within 1 meter of the unit, there must be an earthed wall plug.
In order to prevent the condense outlet from freezing, the unit must be installed in a
frost-free room. Preferably ensure there is a space of at least 2 cm next to the boiler.
No free space is required due to danger of singeing.
4.2.1 Installing in kitchen cabinet
he unit can be placed between two kitchen cabinets, or inside a kitchen cabinet.
Make sure there is sufficient ventilation at the bottom and the top.
If the unit is installed inside a cabinet, ventilation openings of at least 50 cm
2
are
required.
4.2.2 Removing cover plate and front panel
For various activities on the unit, the cover plate and front panel have to be removed
from the unit, if they were installed. Do this as follows:
•If you are using the cover plate (A), remove it to the front.
•Unscrew both screws (1) behind the display window.
•Pull the bottom of the front panel (2) forwards.
Danger: risk of burning
In case of high leaving water set ponts for space heating (eighter a high fixed set point
or a high weather-dependent set point at low ambient temperatures), the heat
exchanger of the boiler can be very hot, for example 70°C.
Beware that in case of a tapping demand, the water can initially have a higher water
temperature than requested.
In this case, it is recommended to install a thermostatic valve to prevent scalding.
his can be done according to the schematics below.
a=boiler, b=DHW from boiler, c= cold water inlet,
d=shower, e=thermostatic valve (field supply)

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4.3 Assembly
he boiler can be hung to the wall using :
•the wall suspension strip and a the connection kit EKVK4AA
•a B-pack including an expension vessel and a connection kit.
4.3.1 Assembling suspension strip and assembly bracket
•Make sure the construction of the wall is suitable for hanging the boiler.
•Drill the holes for the suspension strip and the connection kit in the wall
using the template delivered with the boiler.
•Mount the suspension strip and the assembly bracket horizontally on the
wall, using the associated attachment materials.
•he boiler can now be placed on the suspension strip simultaniously sliding
the pipes of the boiler into the valves in the assembly bracket.
4.3.2 Assembling B-pack
•Make sure the construction of the wall is suitable for hanging the boiler and
B-pack.
•Drill the holes for the B-pack kit in the wall using the template delivered
with the boiler.
•Mount the B-pack on the wall using the associated attachment materials.
•Place the assembly bracket in the frame as described in the manual
inclued in the B-pack.
•Connect the flexible hose on the expension vessel and the conenction on
the return valve. Make sure the seal rings are placed !
•he boiler can now be placed on B-pack simultaniously sliding the pipes of
the boiler into the valves in the assembly bracket.
020601020

15
4.3.3 Assembling the unit
1. Unpack the unit.
2. Check the content of the packaging, which consists of:
•Unit (A)
•Suspension strip (B)
•Siphon + flexible hose (C)
•Installation instructions
•Operating instructions
•Warranty card
3. Check the unit for any damage: immediately report damages to the supplier.
4. Install the suspension strip.
5. Check whether the compression rings are positioned straight in the couplings of
the assembly bracket.
6. Position the unit: slide it from top to bottom over the suspension strip (B).
Make sure the pipes slide into the compression fittings simultaneously.
7. ighten the compression fittings onto the assembly bracket.
The nipples and pipes must not rotate with it!
8. Open the display valve and loosen the two screws on the left and right of the
display, and remove the front panel.
9. Assemble the flexible tube (D) onto the outlet of the siphon.
Fill the siphon with water, and slide it as far as possible on top of the condense
output connector (E) under the unit.
I PORTANT
The unit RHOB42AAV1H may only be connected using the
extended siphon provided. In case of any replacement, make
sure the correct version is ordered.
10. Seal flexible tube (D) of the siphon, if possible together with the overflow pipe of
the inlet combination and the overflow valve, to the sewage via open connection
(F).
11. Assemble the air supply and the burning gas outlet (see par. 0).
12. Assemble the cover and tighten the two screws to the left and the right of the
display, and close the display cover.
4.3.4 Apply cover plate (optional)
Suspend the converted top edge of the cover plate from the washers underneath the
bottom of the unit, and slide the cover plate as far back as possible.
Please note: When installing the boiler in combination with a cover plate, the siphon
will extend underneath the cover plate.

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5CONNECTING
5.1 Connecting CH installation
1. Rinse the CH installation carefully.
2. Fit the supply pipe (A) and return pipe (B) to the connection set.
3. All pipes must be assembled with no electrical current, in order to prevent shocks
from the pipes.
4. Existing connections may not be rotated, in order to prevent leakages.
The CH installation must be fitted with:
•A filling/draining tap (A) in the return pipe, immediately underneath the unit.
•A draining tap at the lowest point of the installation.
•An overflow valve (B) of 3 bar in the input pipe at a distance of no more than 500 mm
from the unit.
Between the unit and the overflow valve there may be no valve or constriction.
•An expansion vessel in the return pipe (in the B-pack or in the installation).
•A check valve, if there are pipes running up, within close distance of the unit. his
prevents a thermosiphon effect from occurring during tap water operation (a non
spring-operated return valve, must be assembled vertically).
5.1.1 Thermostatic radiator taps
If all radiators are fitted with thermostatic or cable radiator taps, a minimum water
circulation must be safeguarded. See par. 7.5.
A
B
020601009
B
A
020601010

17
5.1.2 Dividing CH installation in groups in case of additional heat
sources
Operating principle
If the room thermostat switches off the boiler because another heat source (wood heater,
open fire etc.) heats the room, the other rooms may cool down. his can be resolved by
splitting the CH installation into two zones. he zone with the external heat source (Z2)
can be shut off from the main circuit by means of an electrical shut-off valve. Both zones
are fitted with their own room thermostat.
Please note: his “external heat source” regulation may only be applied if no extra
external tank has to be heated up (installation type 1).
Installation instructions
1. Install the valve in accordance with the connection diagram.
2. Connect the room thermostat of zone 1 to X4 – 6/7.
3. Connect the room thermostat of zone 2 to X4 – 11/12.
4. Change parameter A (see Parameter settings via the service code par. 7.2).
Please note: The room thermostat in zone 1 MUST be an on/off thermostat. The room
thermostat in zone 2 may be an penTherm thermostat or an on/off thermostat.
Connection diagram “external heat source” regulation
A. Boiler
B. Electrical shut-off valve 230 V ~
C. Radiators
1. Room thermostat zone 1
2. Room thermostat zone 2
Z1. Zone 1
Z2. Zone 2
Connecting external tank
For the connection of the RHOB*A*V1H to an indirectly fired tank, the following is
delivered upon order:
•ank sensor
•hree-way valve set 230V
Connect the tank and three-way valve to the boiler in accordance with the diagram.
Remove the through connection between 9 and 10 to connector X4. Connect the three-
way valve to connector X2 and connect the tank sensor or thermostat to connector X4
in accordance with the wiring diagram (see par. 10.2).
Connection diagram indirectly fired tank
C. Unit
D. anks
E. CH installation
F. Expansion vessel
G. Safety valve 3 Bar
H. hree-way valve
I. ank sensor or thermostat
Note
When an on/off tank thermostat is used, the heat request will start when the thermostat is
opened, and it will end when the thermostat closes again.
In case of old installations or domestic hot water circuits which can contain small
particles, install a filter in the domestic hot water circuit.
his pollution could cause a fault during domestic hot water operation.

18
5.2 Connecting electronically
CAUTION
A socket with safety ground must be no further than 1 meter
from the unit.
The socket must be easily accessible.
When installing the unit in a damp space, a fixed connection is
obligatory, by means of an all-pole main switch with a
minimum contact gap of 3 mm.
If the mains cable is damaged or requires replacement for any
other reason, the replacement mains cable must be ordered
from the manufacturer or its representative. In case of any
doubt, contact the manufacturer or its representative.
1. Remove the plug from the socket, when working on the electrical circuit.
2. If there is a cover plate (A), remove it to the front.
3. Unscrew both screws (1) behind the display window.
4. Slide the bottom of the front panel (2) forwards, and remove it.
5. Pull the boiler controller forward. he boiler controller will tip downwards in the
process.
6. Consult par. 5.2.1 to make the connections.
7. After the required connections have been made, slide the boiler controller back into
the unit and return the cover plate, if you are using one.
8. After making the required connections, connect the unit to the socket with safety
ground.
5.2.1 Electrical connections
Temperature regulation Connector X4 Comments
Room thermostat on/off 6 - 7 -
Modulating thermostat with
comfort function in use
11 - 12
Outdoor temperature
sensor
8 - 9 -
Frost thermostat 6 - 7 Parallel over room thermostat
Boiler Sensor 9 - 10 Remove yellow cable bridge

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5.3 Connect room thermostat
5.3.1 Room thermostat on/off
1. Connect the room thermostat (see par. 10.2).
2. If necessary, set the feedback resistance of the room thermostat to 0.1 A. If unsure,
measure the electrical current and set it accordingly.
he maximum resistance of the thermostat pipe and the room thermostat amounts to a
total of 15 Ohm.
5.3.2 odulating thermostat, Open Therm
he unit is suitable for connecting a modulating room thermostat, in accordance with
the Open herm communication protocol.
he most important function of the modulating room thermostat is to calculate the input
temperature at a required room temperature, in order to make optimal use of the
modulating. At every heating request, the required input temperature is shown on the
display of the unit.
Connect the modulating thermostat (see par.10.2).
If you want to use the tap water on/off switch function of the Open herm thermostat, the
tap water comfort function must be set to eco or on.
For more information, consult the manual of the room thermostat.
5.3.3 odulating room thermostat, wireless
he RHOB*A*V1H CH boiler is suitable to communicate wireless without
sending/receiving module with the Honeywell room thermostats 87RF1003 Round RF,
D S92 and CMS927. he CH boiler and the room thermostat must be appointed to each
other:
•Press the reset button of the unit for approximately 5 seconds in order to get to the RF-
room thermostat menu.
•One of the following codes will be shown on the display of the unit:
1. rF and L / - : the display above the button shows an L alternated by a –
red led : flashing
he CH boiler has not been appointed. A unit in this operating status, can be linked
by using the method of the appropriate room thermostat.
he method of appointment depends on the type of room thermostat and is
described in the installation and operating instructions of the wireless
room thermostat.
2. rF and L / 1 : the display above button shows an L alternated by a 1
red led : off
he CH boiler has already been appointed. here is already an existing link with
an RF room thermostat. In order to allow a new link to be made, the existing link
will have to be removed.
See: Undo the appointment of an RF room thermostat to the CH boiler.
•Press the reset button to exit the RF room thermostat menu or wait for 1 minute.
Testing the connection between the unit and the RF room thermostat
1. Press the reset button of the unit for approximately 5 seconds to access
the RF room thermostat menu of the boiler controller.
2. Press the service button 1x. On the display above the button, a t
will be shown.
3. Set the room thermostat to the test mode (see the installation and operating
instructions of the room thermostat).
4. he red led above the reset button will flash if the appointment has
been carried out correctly.
5. Press the reset button of the unit to exit the RF room thermostat menu of
the boiler controller. You will automatically exit the test mode 1 minute after
the last test message of the RF room thermostat has been received.

20
Undo the appointment of an RF room thermostat to the CH boiler.
•Press the reset button of the unit for approximately 5 seconds to
access the RF room thermostat menu of the CH boiler.
•Press the service button 2x. On the display above the button, a
C will be shown.
•Press the reset button of the unit again to remove the existing
appointments. he display of the unit will show rF again, with a flashing
L / - . If required, an RF room thermostat can be appointed to the unit
again.
•Press the reset button of the unit to exit the RF room thermostat menu
or wait for 1 minute.
5.3.4 Outdoor temperature sensor
he unit is provided with a connection for an outdoor temperature sensor. he
outdoor temperature sensor should be used in combination with an on/off room
thermostat.
In principle, any on/off room thermostat can be combined with an outdoor sensor.
Upon request of the room thermostat, the boiler will provide heat until the maximum
set temperature in the boiler has been reached. his maximum set temperature is
automatically regulated via the outdoor sensor, in accordance with the set fuel line
in the boiler.
Connect the room outdoor sensor (see par. 10.2).
For the fuel line setting, see the weather dependent regulation (see par. 0).
5.4 Connecting gas
1. Fit the gas valve directly on the 1/2" gas connection of the connection set
using appropriate seal.
2. Place a gas sieve in the connection for the unit if the gas may be
contaminated.
3. Connect the gas pipe in the gas valve using appropriate seal.
4. Check the gas carrying parts for leakages at a pressure of up to 50 mbar.
5. he gas pipe should be fitted pressure free.
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5.5 Flue and air supply duct
For the installation of the flue and air supply duct material, see the
manual included with the materials. Contact the
manufacturer of the relevant flue and air supply duct materials for
extensive technical information and specific
assembly instructions.
ake sure that the socket connections of the flue and air supply duct
materials are correctly sealed.
Improper fastening of the flue and the air supply duct
can lead to hazardous situations or result in personal injury.
Check all flue components for tightness.
Don not use screws or parkers to mount the flue system as leakage can
occur.
Do not use any sort of grease when mounting the pipe system.
Use water instead. The sealing rubbers can be negatively affected when
grease is applied.
Do not mix any components, materials or ways of coupling from
different manufacturers.
5.5.1 Concentric connection 60/100
he boiler is fitted with a flue gas adapter suitable for connecting to a concentric flue gas extractor
system with a diameter of 60/100.
Fit the concentric pipe thoughtfully in the adapter. he built in gaskets ensure there is an air tight
seal.
5.5.2 Concentric connection 80/125
If required, the flue gas adapter 60/100 can be replaced by a version for a flue gas extractor
system with a 80/125 diameter.
1. Carefully follow the instruction as provided with the adapter set 80/125.
2. Fit the concentric pipe thoughtfully in the adapter. he built in gaskets ensure there is an air
tight seal.
5.5.3 Parallel connection 80/80
If required, the flue gas adapter 60/100 can be replaced by a version for a parallel flue system (2
pipes) with a 80 mm diameter.
1. Carefully follow the instruction as provided with the adapter set 80.
2. Fit the pipes for the air supply and flue gas thoughtfully in the air inlet opening and flue gas
adapter of the unit. he built in gaskets ensure there is an air tight seal. Make sure that the
connections are not mixed.