Daikin RKOMB22AAV1H, RKOMB28AAV1H, RKOMB33AAV1H Installation manuals

TABLE OF CONTENTS

Safety instructions 5

Unit description 6

2.1 General ............................................................................................................................................................................................ 6

2.2 Functioning ...................................................................................................................................................................................... 6

2.3 Operating modes ............................................................................................................................................................................. 7

2.4 PC Interface .................................................................................................................................................................................... 8

2.5 Test programs ................................................................................................................................................................................. 8

Main components 10

3.1 Accessories ................................................................................................................................................................................... 11

Installation 12

4.1 Installation measurements ............................................................................................................................................................ 12

4.2 Installation space ........................................................................................................................................................................... 14

4.3 Assembly ....................................................................................................................................................................................... 15

Connecting 17

5.1 Connecting CH installation ............................................................................................................................................................ 17

5.2 Connecting DHW installation ......................................................................................................................................................... 20

5.3 Connecting electronically .............................................................................................................................................................. 21

5.4 Connect room thermostat .............................................................................................................................................................. 22

5.5 Connecting gas ............................................................................................................................................................................. 23

5.6 Flue and air supply duct ................................................................................................................................................................ 24

5.7 Outlet systems ............................................................................................................................................................................... 25

5.8 Flue material .................................................................................................................................................................................. 26

5.9 Connection to a flue system without air inlet (B23, B33) .............................................................................................................. 28

5.10 Connection to a sealed flue system. ............................................................................................................................................. 29

Commissioning the unit and the Installation 37

6.1 Filling and air purge of unit and installation ................................................................................................................................... 37

6.2 Commissioning the unit ................................................................................................................................................................. 38

6.3 Switching off the unit ..................................................................................................................................................................... 39

Setting and adjustment 40

7.1 Direct via operating panel .............................................................................................................................................................. 40

7.2 Parameter settings via the service code ....................................................................................................................................... 41

7.3 Setting maximum CH power .......................................................................................................................................................... 43

7.4 Setting pump setting ...................................................................................................................................................................... 43

7.5 Weather dependent regulation ...................................................................................................................................................... 43

7.6 Conversion to different type of gas................................................................................................................................................ 44

7.7 Gas/air regulation .......................................................................................................................................................................... 44

7.8 Setting gas/air regulation ............................................................................................................................................................... 45

Malfunctions 47

8.1 Show last malfunction ................................................................................................................................................................... 47

8.2 Malfunction codes ......................................................................................................................................................................... 47

8.3 Other faults .................................................................................................................................................................................... 48

Maintenance 51

Technical specifications 53

10.1 Technical Product Fiche in accordance to CELEX-32013R0811 .................................................................................................. 54

10.2 Electrical diagram RKOMB22AAV1 H, RKOMB28AAV1 H & RKOMB33AAV1 H ........................................................................ 55

10.3 NTC resistances ............................................................................................................................................................................ 56

Warranty conditions 57

All rights reserved. The 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. The 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.

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

High Efficiency HR Rotex RKOMB22AAV1H, RKOMB28AAV1H, RKOMB33AAV1H Unit with piping for central heating CH installation System with pipes for domestic hot water DHW installation

Unit

Symbols

The 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.

IMPORTANT Procedures and/or instructions which, if they are not

followed, will have a negative effect on the functioning of the unit.

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. The 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 Domestic Hot Water

Data related to Central Heating

Information regarding electrical power supply Voltage, mains frequency, elmax, IP-class)

PMS Permissible overpressure in CH circuit in bar

PWS Permissible overpressure in DHW 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, PL, IT, GR,

I2E(s), I2H, , II2H3P,

II2Esi3P G20-20 mbar G25-25 mbar

B23, …. C93(x) Approved flue gas category (EN 15502)

Tmax Max. flow temperature in °C

IPX4D Electrical protection class

Countries of Destination (EN 437)

Approved unit categories (EN 437)

Gas group and gas connection pressure as set at the factory (EN 437)

1 SAFETY INSTRUCTIONS

The 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 RKOMB*AAV1H wall-mounted gas boiler and any associated accessories.

This 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.

The 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.

IMPORTANT This product is intended for domestic use only.

2 UNIT DESCRIPTION

2.1 General

The Rotex RKOMB*AAV1HAAV1H wall-mounted gas boiler is a closed unit. The unit is intended to provide heat to the water of a CH installation and the domestic hot water installation.

The air supply and combustion gas outlet can be connected to the unit by means of two separate pipes. A concentric connection can be supplied upon demand. The 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.

The unit can be connected to an assembly bracket if required, a frame with top connection, and various installation sets. These are provided separately.

The Rotex RKOMB*AAV1H wall-mounted gas boilers have the CE quality mark, electrical protection class IPX4D.

It is possible to use the unit solely for warm water, or solely for heating. The system which is not in use, does not need to be connected (see par. 7.2). The unit is delivered for natural gas (G20) as a standard. On request, the unit can also be provided for propane (G31).

2.2 Functioning

The Rotex RKOMB*AAV1H wall-mounted gas boiler is a modulating high-efficiency boiler. This means that the power is modulated to suit the required heat demand. In the aluminum heat exchanger two separate copper circuits are integrated.

The separate circuits for CH and warm water allow the heating and warm water supply to function independently. The hot water supply takes precedence over the heating. Both cannot work at the same time.

The unit is fitted with an electronic boiler controller machine, 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

The operating mode of the unit is indicated by means of a code on the service display of the operating panel.

Off

The 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. The unit frost protection is active. This 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 The pressure in the CH installation can also be read from the temperature display in this

operating mode (in bar).

Standby

The LED at the key is lit and possibly one of the LEDs of the tap comfort function. The unit is ready to respond to a request for CH or tap water.

Post-running CH

After the end of the CH operation, the pump will run for a specified time. The post-pumping time is set to the value in par. 7.2 in its factory settings. This 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. This 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.

Requested temperature reached

The boiler controller may temporarily block the heat request. The boiler controller will then be stopped. The block occurs because the required temperature has been reached. When the temperature has sufficiently decreased, the block will be lifted.

Self test

Once every 24 hours, the boiler controller tests the connected sensors. During the test, the controller will not carry out any other tasks.

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.

Igniting

When the fan has reached the start rpm, the boiler controller will be ignited by means of electrical sparks. During the ignition, code

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 downtime.

CH operation

An on/off thermostat, an OpenTherm thermostat, an outdoor sensor or a combination thereof can be connected to the controller (see par. 10.1).

When there is a heat request from a thermostat, after the fan has started running (code 3), the ignition will take place (code During CH operating, 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 OpenTherm 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.

The 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.

will be displayed (heating up exchanger).

is displayed. If the boiler controller does

) followed by the CH operating mode (code 5 ).

If the tap comfort function is switched on (see code request of less than 40 degrees will be generated.

), an OpenTherm heating

Tap water operation

The hot water supply takes precedence over the heating. If the flow switch senses a request for more than 2 l/min of domestic hot water, any CH requests will be

interrupted. After the fan has switched on (code

(code

), the controller will switch to domestic water operation (code domestic hot water operation, the rpm of the fan, and therefore the power of the unit, is controlled by the controller on the basis of the set tap water temperature.

The control system ensures the tap water temperature is correct. The water temperature can be set between 40°C and 65°C (see par. 7.1). The set tap water temperature is displayed on the operation panel. The standard setting is 60°C.

You can press the service button during tap water operation to read the actual tap water temperature.

Heating up unit

In order to provide a fast supply of domestic hot water, a so-called tap comfort function has been installed in the unit. This function keeps the heat exchanger at the right temperature (this temperature can be set, see par. 7.2). The tap comfort function has the following settings:

•

On: ( LED on) The tap comfort function of the unit is continuously switched on. The unit always immediately provides warm water. Eco: ( LED on) The tap comfort function of the unit is self-learning. The unit will adjust to the usage pattern of the domestic hot water. This means the heat exchanger will not be kept warm during the night or during longer absences. Off: (Both LEDs off) The heat exchanger is not kept warm which means the supply of domestic hot water takes a bit of time. If there is no need for fast delivery of domestic hot water, the tap comfort function can be switched off.

) and there has been an ignition

). During

2.4 PC Interface

The boiler controller is provided with an interface for a PC. A PC can be connected by means of a special dongle, and the associated software. This 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

There is an option in the boiler controller, 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. The safety functions do remain active. The 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) Burner on with set maximum CH power (see parameter 3 par. 7.2) Burner on with maximum DHW power (see parameter 3 par. 7.2)

Switching off test program and

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.

and

and (1x)

and (2x)

"L"

"h"

"H"

Current operation

situation

2.5.1 Frost protection

freezing. If the temperature of the heat exchanger drops too low, the

frost thermostat on the return pipe.

•

The unit is fitted with frost protection in order to prevent it from

pump will start running until the temperature of the heat exchanger is sufficiently high. If the frost protection intervenes, 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) This must be connected in accordance with the electrical diagram (see par. 10.2).

Note When the unit is switched off (

remain active, however a heating request from an (external) frost thermostat will be ignored.

on the service display), the unit frost protection will

3 MAIN COMPONENTS

A. CH pump L. Air supply (only when using twin pipe flue system) B. Gas valve M. Flue gas/air inlet concentric adapter C. Burner controller (incl. operating panel) N. Connection block / terminal strip X4 D. Sensor S1 (flow) O. Condensate drain pan E. Sensor S2 (return) P. Domestic hot water sensor S3 F. Fan Q. Siphon G. Flow sensor R. Heat exchanger H. Pressure sensor central heating S. Operating panel and display I. Connection wire 230 V ~ with earthed plug T. Ionization / ignition pen J. Manual air bleed U. Position of data plate K. Sight glass

3.1 Accessories

Description Article numbers B-pack small EKFJS*AA

B-pack middle EKFJM*AA

B-pack large EKFJL*AA

Valve kit EKVK4AA Cover plate EKCP1AA

Outdoor sensor EKOSK1AA 3-way valve set EK3WV1AA Flue gas adapter Concentric Ø80x125 EKHY090717

Flue gas adapter Parallel 80 mm

EKHY090707

Propane conversion set *KOMB28AAV1H & *KOMB33AAV1H EKHY075787 Propane conversion set *KOMB22AAV1H EKPS075867

4 INSTALLATION

A = Supply CH

G ¾” (ext)

B = Return CH

G ¾” (ext)

C = Gas G ½” (int)

D = Tap water cold

R ½”

E = Tap water warm

R ½”

F = Condense outlet

Ø dn25 (flexible)

h= 517mm

RKOMB

AAV1H

577mm

RKOMB

AAV1H

637mm

RKOMB

AAV1H

H= 590mm

RKOMB

AAV1H

650mm

RKOMB

AAV1H

710mm

RKOMB

AAV1H

Z = Flue gas

outlet/air inlet

Ø60/100 (concentric)

020601002

161

450

240

135

4.1 Installation measurements

Unit with pipes connected downwards:

Unit + wall mounting strip

A = Supply CH

G ¾” (ext)

B = Return CH

G ¾” (ext)

C = Gas G ½” (int)

D = Tap water cold

R ½”

E = Tap water warm

R ½”

F = Condense outlet

Ø dn25 (flexible)

H= 770mm

RKOMB

AAV1H

830mm

RKOMB

AAV1H

890mm

RKOMB

AAV1H

Z = Flue gas

outlet/air inlet

Ø60/100 (concentric)

020601001

265

Unit connected to B-pack:

Unit + B-pack

4.2 Installation space

The 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 a 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

The 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 cm2 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. This 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)

4.3 Assembly

020601020

The 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.

• Place the filling loop on the connections of the return and cold water nipple following the connection kit installation instruction

• The 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 !

• Place the filling loop on the connections of the return and cold water nipple following the connection kit installation instruction

• The boiler can now be placed on B-pack simultaniously sliding the pipes of the boiler into the valves in the assembly bracket

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. Tighten 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.

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. 5.6 ) 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.

5 CONNECTING

Connect an underfloor heating system indirectly hydraulically neutrally or provide the

020601013

020601014

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. This prevents a thermo siphon 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. 7.4.

5.1.2 Underfloor heating

Underfloor heating distributor with pump

If an underfloor heating system is not hydraulically neutral, the underfloor heating pump may generate unwanted circulation over the boiler. For a good functioning of the domestic hot water provision, unwanted circulation over the boiler must be prevented.

CH installation with a two-way valve set 230 V ~ (E). If the underfloor heating pump absorbs heat via the return of the boiler, unwanted circulation can be prevented by means of a check valve (D).

Make sure there is a minimal water circulation. See par. 7.3.

Connection diagram underfloor heating

A. Boiler B. Pump C. Thermostatic control valve D. Spring-operated check valve E. Electrical valve 230 V ~ F. Radiators G. Space/clock thermostat H. Maximum thermostat

Underfloor heating distributor without pump

Connect the underfloor heating system (D) and set the maximum CH supply temperature of the boiler to the design condition. Fit a clamp thermostat (A) onto the supply tube underneath the boiler. The clamp thermostat with blind cap must be set to a maximum supply temperature of 55°C.

Assemble the on/off room thermostat (B) and connect it in series with the clamp thermostat to connector X4 - 6/7 in the unit. See par. 10.1.

In this situation, the pump in the boiler is used to bridge the loss of pressure of the underfloor heating system. Using the loss of pressure graph par. 7.4, the maximum loss of pressure of the underfloor heating system can be determined.

Make sure there is a minimal water circulation. See par. 7.3. If required, install a bypass valve (C).

In case of an underfloor heating system without pump, we recommend changing the following parameter settings: par. o from 0 to 3. par. P from 5 to 2. Parameter 3 must also be set to its minimum level, or the transmission loss of the property.

5.1.3 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. This can be resolved by splitting the CH installation into two zones. The 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: "external heat source" regulation may only be applied if no extra external boiler 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 thermostat in zone 2 may be an OpenTherm thermostat or an on/off thermostat.

Connection diagram "external heat source" regulation A. Boiler B. Electrical shut-off valve 230 V ~ C. Radiators T1. Room thermostat zone 1 T2. Room thermostat zone 2 Z1. Zone 1 Z2. Zone 2

1 MUST

be an on/off thermostat. The room

5.2 Connecting DHW installation

020601015

1. Rinse the installation carefully.

2. If required, assemble an inlet combination.

3. Assemble the cold (D) and warm water pipe (C) to the connection set.

Comments

•

If the unit is only used for warm water supply, the heating function can be switched off using the service code on the operating panel. The CH installation does not need to be connected or filled.

•

If the unit is switched off during winter, and is disconnected from the electricity supply, the sanitary water must be drained in order to prevent freezing. To do so, disconnect the tap water connections underneath the unit.

In case of old installations or domestic hot water circuits which can contain small particles, install a filter in the domestic hot water circuit. This pollution could cause a fault during domestic hot water operation.

Resistance graph tap circuit unit

A. RKOMB22AAV1H B. RKOMB28AAV1H C. RKOMB33AAV1H X. Water pipe pressure (Bar) Y. Flow rate (L/min, tolerance ± 10%)

5.3 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. The boiler controller unit will tip downwards in the process.

6. Consult par. 10.2 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.

5.3.1 Electrical connections

Temperature regulation Connector X4 Comments

Room thermostat on/off 6 - 7 Modulating thermostat with comfort function in use Outdoor temperature sensor External energy-saving switch Frost thermostat 6 - 7 Parallel over room thermostat

11 - 12

8 - 9 -

4 - 5 Set parameter c. to 0

Also see par. 7.2

5.4 Connect room thermostat

5.4.1 Room thermostat on/off

1. Connect the room thermostat (see par. 10.1).

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. The maximum resistance of the thermostat pipe and the room thermostat amounts to a total of 15 Ohm.

5.4.2 Modulating thermostat, Open Therm

The unit is suitable for connecting a modulating room thermostat, in accordance with the OpenTherm communication protocol.

The 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.10.1). If you want to use the tap water on/off switch function of the OpenTherm thermostat, the

tap water comfort function must be set to eco or on. For more information, consult the manual of the room thermostat.

5.4.3 Modulating room thermostat, wireless

The RKOMB*AAV1H CH boiler is suitable to communicate wirelessly without sending/receiving module with the Honeywell room thermostats T87RF1003 Round RF, DTS92 and CMS927. The 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

The CH boiler has not been appointed. A unit in this operating status, can be linked by using the method of the appropriate room thermostat. The 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 the button shows an L alternated by a 1

red led : off

The CH boiler has already been appointed. There 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 leave 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 will be shown.

3. Set the room thermostat to the test mode (see the installation and operating instructions of the room thermostat).

4. The 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.

020601017

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

will be shown.

• Press the reset button of the unit again to remove the existing appointments. The 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 leave the RF room thermostat menu or wait for 1 minute.

5.4.4 Outdoor temperature sensor

The unit is provided with a connection for an outdoor temperature sensor. The 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. This 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. 10.1). For the fuel line setting, see the weather dependent regulation (see par. 7.5).

5.5 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. The gas pipe should be fitted pressure free.

5.6 Flue and air supply duct

Don not use screws or parkers to mount the flue system as leakage can

Use water instead. The sealing rubbers can be negatively affected when

5.6.1 Concentric connection 60/100

The 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. The built in gaskets ensure there is an air tight seal.

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.

Make 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.

occur. Do not use any sort of grease when mounting the pipe system.

grease is applied. Do not mix any components, materials or ways of coupling from different manufacturers.

5.6.2 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. The built in gaskets ensure there is an air tight seal.

5.6.3 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. The built in gaskets ensure there is an air tight seal. Make sure that the connections are not mixed.

5.7 Outlet systems

Explanation

flue systems

Category in accordance to CE

B23 A flue that evacuates the products of combustion to the outside of

Make sure the air inlet is open

B33 A flue system which is connected to a common duct system. This common duct system

Make sure the air inlet is open

C13 Horizontal flue system. Discharge in the outside wall.

For example : a

wall terminal

C33 Vertical flue system. Flue gas discharge via the roof.

For example : a vertical roof

C43 Joint air supply and flue gas

discharge duct (CLV system)

C53 Separate air supply and separate flue gas discharge duct.

C63 Free in the market available flue material with CE approval

Do not mix flue materials from

C83 Joint air supply and flue gas discharge duct (CLV system)

Only as twin pipe system

C93 Air supply and flue gas discharge duct in shaft or ducted: Concentric. Air supply from

Concentric flue system

Please note that not all flue gas configurations described below are permitted in all countries. Therefore observe local regulations prior to installation.

The drawings above are a sample and can differ on details.

the room containing the appliance. The combustion air is drawn directly from the room.

consists of a single natural draught flue. All pressurized parts of the appliance containing products of combustion are completely enclosed by parts of the appliance supplying combustion air. Combustion air is drawn into the appliance from the room by means of a concentric duct, which encloses the flue. The air enters through defined orifices situated in the surface of the duct.

Inlet opening for the air supply is in the same pressure zone as the discharge

Twin-pipe or concentric

Discharging into different pressure zones

and complies to the demands

through the facede.

terminal.

Discharging into different pressure zones

existing duct. Flue gas discharge via the roof. Air supply and flue gas discharge are in the same pressure zone.

different suppliers.

between the boiler and the duct.

5.8 Flue material

The following flue materials can be ordered at Rotex. Also visit the website: fluegas.Rotex.eu

C13

Art.no. Description

EKFGP2978

EKFGP4651

EKFGP4652

EKFGP4660

EKFGP4661

EKFGP2977

EKFGP4664

EKFGP4631

EKFGP4667

Wall Terminal Kit PP/GLV 60/100

Extension PP/GLV 60/100 x 500mm

Extension PP/GLV 60/100 x 1000mm

Elbow PP/GLV 60/100 90°

Elbow PP/GLV 60/100 45°

Wall Terminal Kit low profile PP/GLV 60/100

Elbow PP/GLV 60/100 30°

Wall Bracket Dn.100

Measurement Tee with Inspection Panel PP/GLV 60/100

C33

Art.no. Description

EKFGP4631 Wall Bracket Dn.100

EKFGP4651 Extension PP/GLV 60/100 x 500mm

EKFGP4652 Extension PP/GLV 60/100 x 1000mm

EKFGP4660 Elbow PP/GLV 60/100 90°

EKFGP4661 Elbow PP/GLV 60/100 45°

EKFGP4664 Elbow PP/GLV 60/100 30°

EKFGP4667 Measurement Tee with Inspection Panel PP/GLV 60/100

EKFGP6837 Roof Terminal PP/GLV 60/100 AR460

C53

Art.no. Description

EKFGP4651 Extension PP/GLV 60/100 x 500mm

EKFGP4652 Extension PP/GLV 60/100 x 1000mm

EKFGP6837 Roof Terminal PP/GLV 60/100 AR460

EKFGW4085 Elbow PP 80 90°

EKFGW4086 Elbow PP 80 45°

EKFGV1102 Chimney Conection Set 60/100 Air Intake Dn.80 C53

EKFGP4660 Elbow PP/GLV 60/100 90°

EKFGP4661 Elbow PP/GLV 60/100 45°

EKFGP4664 Elbow PP/GLV 60/100 30°

EKFGP4667 Measurement Tee with Inspection Panel PP/GLV 60/100

EKFGP4631 Wall Bracket Dn.100

EKFGW4001 Extension PP 80x500

EKFGW4002 Extension PP 80x1000

EKFGW4004 Extension PP 80x2000

C93

Art.no. Description

EKFGP4678 Chimney Connection 60/100

EKFGP1856 Flex Kit PP Dn.60-80

EKFGP6340 Extension Flex PP 80 L=10 M

EKFGP6344 Extension Flex PP 80 L=15 M

EKFGP6341 Extension Flex PP 80 L=25 M

EKFGP6342 Extension Flex PP 80 L=50 M

EKFGP6324 Connector Flex-Flex PP 80

EKFGP4664 Elbow PP/GLV 60/100 30°

EKFGP4661 Elbow PP/GLV 60/100 45°

EKFGP4660 Elbow PP/GLV 60/100 90°

EKFGP6333 Spacer PP 80-100

EKFGP4667 Measurement Tee with Inspection Panel PP/GLV 60/100

EKFGP4631 Wall Bracket Dn.100

EKFGP4651 Extension PP/GLV 60/100 x 500mm

5.9 Connection to a flue system without air inlet (B23, B33)

CAUTION

• Make sure the boiler room complies to the regulatory requirements for connecting to a flue system in accordance to B23 or B33

• When connection the boiler to a flue system in accordance to B23 or B33 the electrical protection class is IP20 instead of IPX4D

General assembly

1. Slide the combustion gas outlet pipes into each other. From the unit, every pipe has to be slid into the previous one.

Mount a non-vertical combustion gas outlet pipe on a slope towards the unit (min. 5mm/m).

5.9.1 Permitted pipe lengths at parallel air supply and flue tube systems

Permitted pipe lengths B23 and B33 when applying Ø80 mm

C13 C33 C43 C53 C83 RKOMB22AAV1 100 m 100 m 100 m 100 m 100 m RKOMB28AAV1 85 m 85 m 85 m 85 m 85 m RKOMB33AAV1 80 m 80 m 80 m 80 m 80 m

5.10 Connection to a sealed flue system.

5.10.1 Pipe lengths

As the resistance of the flue tube and air supply pipes increases, the power of the unit will decrease. The maximum permitted power reduction is 5%.

The resistance of the air supply and the combustible gas outlet depends on the length, diameter and all components of the pipe system. Per unit category, the total permitted pipe length has been indicated for the air supply and the combustible gas outlet.

5.10.2 Permitted pipe lengths in concentric flue tube systems

Permitted pipe lengths when applying concentric 60/100

C13 C33 RKOMB22AAV1 10 m 11 m RKOMB28AAV1 10 m 10 m RKOMB33AAV1 10 m 10 m

Permitted pipe lengths when applying concentric 80/125

C13 C33 C93 RKOMB22AAV1 29 m 29 m See par. 5.10.8 RKOMB28AAV1 29 m 29 m See par. 5.10.8. RKOMB33AAV1 29 m 29 m See par. 5.10.8

Contact the manufacturer for test calculations for the resistance of the air supply and combustible gas outlet pipe and the wall temperature at the end of the combustible gas outlet pipe.

Replacement lengths

Bend 90° R/D=1 2 m Bend 45° R/D=1 1 m Knee 90° R/D=0.5 4 m Knee 45° R/D=0.5 2 m

General assembly:

For all outlets, the following assembly applies:

1. Slide the concentric combustion gas outlet pipe and air supply pipe.

2. Slide the concentric pipes into each other. From the unit, every pipe has to be slid into the previous one.

3. Mount a non-vertical combustion gas outlet pipe on a slope towards the unit (min. 5mm/m).

4. Fit the assembly brackets in accordance with the assembly instructions of the supplier of the air supply/flue tube system.

5.10.3 Permitted pipe lengths at parallel air supply and flue tube systems

Permitted pipe lengths when applying Ø80 mm (total of flue pipe and air intake pipe together).

C13 C33 C43 C53 C83 RKOMB22AAV1 100 m 100 m 100 m 100 m 100 m RKOMB28AAV1 85 m 85 m 85 m 85 m 85 m RKOMB33AAV1 80 m 80 m 80 m 80 m 80 m

Replacement lengths

Bend 90° R/D=1 2 m Bend 45° R/D=1 1 m Knee 90° R/D=0.5 4 m Knee 45° R/D=0.5 2 m

Calculation example

Pipe Pipe lengths Pipe length total

Flue gas outlet L1 + L2 + L3 + 2x2 m 13 m Air supply L4 + L5 + L6 + 2x2m 12 m

Note:

The total pipe length is: sum of the straight pipe lengths + sum of the replacement pipe lengths of bends/knees amounts to a total of 25 meters. If this value is less than the maximum permitted pipe length, the flue gas outlet meets the requirements on this point.

5.10.4 Free in the market available flue gas materials (C63).

+0,3

- 0,7

+0,3

- 0,7

+ 2

- 0

+0,3

- 0,7

+ 2

- 0

The properties of the combustion determine the choices for the flue material. The standards EN 1443 and EN 1856-1 provide the necessary information for choosing the flow material by means of a sticker including an identification string. The Identification string contains the following information: A CE marking B The standard to comply to: Metal, EN 1856-2

Plastic, EN 14471

The ID string needs to contain the following information:

C Temperature class : T120 D Pressure class : Pressure (P) or High Pressure (Hi) E Resistance class : W (Wet) F Resistance class in case of fire : E

Dimensions C63 Flue system (external dimensions in mm)

Parallel Concentric 80/125 Concentric 60/100 Flue pipe Air inlet Flue pipe Air inlet

ø 80

ø 125

ø 60

ø 100

Flue materials of different markings must not be combined !

5.10.5 Securing the flue system

Exception at connecting on boiler:If the lenght of the pipes before and after

IMPORTANT

•

These regulations are typical for both concentric and parallel flue systems.

•

The flue system must be secured to a solid structure.

•

The flue system should have a continuous fall back to the boiler (1.5° to 3°). N.B. Wall terminals must be installed leveled..

•

Only use accompanying brackets.

•

Every elbow must be secured by using the bracket.

the first elbow, are no more than 250 mm, the second element after the first elbow has to contain a bracket. Note: The bracket must be positioned on the elbow!

•

Every extension must be secured per metre with a bracket. This bracket must not be clamped around the pipe ensuring free movement of the pipe..

•

Make sure bracket is locked into the correct position depending on the position of the bracket on the pipe or elbow:

•

Do not mix flue parts or clamps of different suppliers.

Max. distance between clamps

Vertical Others

2000 mm 1000 mm

•

Divide the lengths between the brackets evenly.

•

Every system must contain at least 1 bracket.

•

Position the first clam at a maximum of 500 mm from the boiler.

5.10.6 Air supply from the facade and a roof outlet with communal exhaust system

Unit category: C83 An air supply from the facade and a roof outlet with communal exhaust system is

permitted.

IMPORTANT

• The air supply in the facade must be fitted with an inlet roster (A).

• The communal output system must be fitted with a traction extractor hood (B).

• If the communal output system is situated in the outdoors, the output pipe must be double-walled or insulated.

Permitted pipe length

Combustion gas outlet pipe between the unit and the communal output system and air supply pipe between the unit and the inlet roster together:

RKOMB22AAV1H 100 m RKOMB28AAV1H 85 m RKOMB33AAV1H 80 m

The minimum diameters of the communal output system based on vacuum

Flue tube diameter Number of units

2 110 130 130 3 130 150 150 4 150 180 180 5 180 200 200 6 200 220 220 7 220 230 230 8 230 250 250 9 240 270 270 10 260 280 280 11 270 290 290 12 280 300 300

Communal combustion gas outlet

The output of the combustion gas outlet can be made in any location on the sloping roof surface, providing the outlet in the roof surface has the same orientation as the air supply in the facade. On a flat roof, the outlet of the combustion gas outlet must be made in the "free" outlet area.

Fit a condense output.

Note

The communal outlet is certified in combination with the unit.

RKOMB22AAV1H RKOMB28AAV1H RKOMB33AAV1H

5.10.7 Combined flue gas outlet/air inlet system

Unit category : C43

IMPORTANT

• A roof outlet through a Combination Air Supply combustion gas outlet system is permitted.

• For the communal combustion gas outlet hood and air supply hood, a declaration of no objection or a Gas certificate from the Gastec Gas institute is required.

• The passage of the pressure balancing opening at the bottom of the communal air supply and flue gas outlet system is equal to

0.44 times the flue gas outlet surface.

The communal air supply and the communal output of the combustion gases may be carried out concentrically or separately.

Permitted pipe length

For parallel: Air supply and combustion gas outlet together, excluding the length of the combi feedthrough.

For concentric: total pipe length, excluding the length of the combi feedthrough.

RKOMB22AAV1H 100 m 10 m 29 m RKOMB28AAV1H 85 m 10 m 29 m RKOMB33AAV1H 80 m 10 m 29 m

The minimum diameters of the communal air supply and flue tube system based on addendum 2001-02 inspection requirements no. 138 of Gastec.

RKOMB22AAV1H and

RKOMB28AAV1H Number of units Concentric Parallel Concentric Parallel Flue

outlet

2 135 253 135 214 155 291 155 246 3 157 295 157 249 166 311 166 263 4 166 311 166 263 176 330 176 279 5 175 328 175 278 186 349 186 295 6 184 345 184 292 196 367 196 311 7 193 362 193 306 206 386 206 326 8 201 376 201 318 216 404 216 342 9 210 393 210 332 226 423 226 358 10 219 410 219 347 236 442 236 374 11 228 427 228 361 247 463 247 391 12 237 444 237 375 257 482 257 407 13 246 461 246 389 267 500 267 423 14 255 478 255 404 277 519 277 439 15 264 494 264 418 287 538 287 454 16 272 509 272 431 297 556 297 470 17 281 526 281 445 307 575 307 486 18 290 543 290 459 317 594 317 502 19 299 560 299 473 328 614 328 519 20 308 577 308 488 338 633 338 535

Air inlet

Parallel Concentric

Flue outlet

Air inlet

Flue outlet

60/100

RKOMB33AAV1H

Air inlet

Concentric

80/125

Flue outlet

Air inlet

5.10.8 Concentric horizontal flue gas outlet, vertical part airsurrounded by shaft

Unit category : C93

A flue tube system according to C93 (C33) is permitted when using CE approved flue material or the flue material provided by Rotex.

The ponts below have to be considered.

General

• Flue outlet in shaft with 60 or 80 mm diameter (rigid or flexible).

• When using plastic flue pipe materials, a minimum temperature class of T120

applies.

• The transfer bend between concentric and vertical flue connection in the shaft must be supported in accordance with supplier instructions. The assembly instruction of the manufacturer for the flue system must always be followed in full.

• In existing installations, the shaft must be inspected and if necessary cleaned before the new installation is commissioned.

• The tightness of the shaft towards living spaces must be ensured.

Permitted pipe length and system requirements

When a shaft (e.g.a brickwork chimney) has the purpose of air intake the following requirements are applicable.

Flue gas pipe

Diameter (mm)

(rigid or flexible)

DN 60 115 x 115 135 11

Dimension shaft [mm] Max. length [mtr]

Square Round

DN 80 135 x 135 155 29

6 COMMISSIONING THE UNIT AND THE INSTALLATION

6.1 Filling and air purge of unit and installation

6.1.1 CH system

1. Insert the unit's plug into a socket. The unit may carry out a self-check:

The unit will then go into the off setting: pressure is shown on the temperature display.

2. Connect the filling hose to the fill/drain tap and fill the installation with clean drinking water, up to a pressure between 1 and 2 bar if the installation is cold (to be read from the temperature display).

3. Aerate the system with the manual aerator (A). Upon request, an automatic aerator can be fitted onto the unit instead of the manual aerator.

4. Aerate the installation with the manual aerators on the radiators.

5. Top up the CH installation if the pressure has dipped too low due to the aeration.

6. Check all couplings for leaks.

7. Check whether the siphon is filled with water.

In case of a CH pressure lower than 0.5 bar, the CH pressure will be displayed flashing on the display.

In the off setting, the CH pressure will be displayed.

WARNING

If the siphon is not filled with water, combustion gases may be released into the room.

WARNING

If an additive is added to the CH water, it must be suitable for the materials used in the unit, such as copper, brass, stainless steel, steel, plastic and rubber. The additive should preferably have a KIWA/ATA/Atest certification.

6.1.2 DHWprovision

1. Open the main tap to bring theDHW section up to pressure.

2. Aerate the exchanger and the pipe system by opening a DHW tap. Leave the tap open until all air has flowed out of the system.

3. Check all couplings for leaks.

(on service display).

(on service display) and the CH

6.1.3 Gas supply

1. Aerate the gas pipe with the initial pressure measuring nipple (D) on the gas block.

2. Check all couplings for leaks.

3. Check the initial pressure and offset pressure (see par. 7.7).

6.2 Commissioning the unit

Reading

Operating

On/off A

On/off button

CH operation or setting maximum CH temperature

B Tap/CH

button, to set the required temperature

Tap operation or setting tap temperature

C - button

Required

temperature CH or tap water in °C / pressure CH water in bar / malfunction code

D + button

Tap comfort function eco

E Tap comfort function off / eco / on

Tap comfort function on

F Service button / actual temperature during heat request

Operating

code G

Reset button

Flashing in case of a malfunction

After the following actions have been completed, the unit may be commissioned.

1. Press the button to commission the unit. The heat exchanger will be heated up, and on the service display, 3, 4 and 7 appear (Depending on status of external eco switch

and/or OpenTherm regulation).

2. Set the pump setting depending on the set maximum power and the water side resistance of the installation. For the water head of the pump and the loss of pressure of the unit: see par. 7.4.

3. Set the room thermostat higher than the room temperature. The unit will now go into CH operation:

4. Fire up the installation.

5. Check the temperature difference between the input and return of the unit and the radiators. This should be approximately 20°C. Set the maximum power on the service panel for this purpose (see par. 7.3). If necessary, set the pump setting and/or radiator shut-off valves. The standard setting of the pump is setting 3. The minimum feedthrough amounts to: 155 l/h at a set power of 5.4 kW 510 l/h at a set power of 17.8 kW 750 l/h at a set power of 26.2 kW 1150 l/h at a set power of 40.9 kW

6. Switch the unit off.

7. Purge the air from the unit and the installation after cooling down (top up if necessary).

8. Check the heating and the hot water provision for the correct functioning.

9. Instruct the user on the filling, air purging and functioning of the heating and the hot water provision.

Comments

•

The unit is fitted with an electronic boiler controller which ignites the boiler controller and continuously monitors the flame, at every heat request from the heating or from the hot water provision.

•

The circulation pump will run at every heat request for the heating. The pump has a post-running time of 1 minute. The post-running time can be changed upon request (see par. 7.3).

•

The pump will run automatically 1 time per 24 hours, for 10 seconds, in order to prevent it from getting stuck. This automatic switching on of the pump takes place 24 hours after the last heating request. To change the time, the room thermostat must be turned up for a moment at the requested time.

•

For the hot water provision, the pump will not run.

on the service display.

6.3 Switching off the unit

CAUTION

Drain the unit and the installation, if the mains electricity supply is interrupted and there is a risk of freezing.

1. Remove the plug from the socket.

2. Drain the unit with the filling/draining tap.

3. Drain the installation at the lowest point.

4. Shut the main tap for the water supply from the hot water section.

5. Drain the unit by loosening the domestic hot water couplings under the unit.

6. Empty the siphon.

6.3.1 Frost protection

•

In order to prevent the condense outlet from freezing, the unit must be installed in a frost-free room.

•

The 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 heat exchanger has warmed up sufficiently. If there is a risk of the installation (or a part thereof) freezing, the coldest place should be fitted with an (external) frost thermostat on the return pipe. This must be connected in accordance with the wiring diagram (see par. 10.2).

Note

If an (external) frost thermostat has been fitted on the installation and has been connected to the unit, it will not be active if the unit on the operating panel is switched

off (

on service display).

7 SETTING AND ADJUSTMENT

The functioning of the unit can be influenced by means of the (parameter) settings in the boiler controller. Part of this can be configured directly via the operating panel, another part can only be adjusted by means of the installers code.

7.1 Direct via operating panel

The following functions can be operated directly.

Unit on/off

The button activates the unit. When the unit is active, the green LED above the button will be lit. When the unit is

off, one bar will be lit on the service display ( electricity supply. In this operation setting, the temperature display will also show the pressure in the CH installation (in bar).

Summer mode. When parameter q is set to a value unlike 0 summer mode can be activated pressing the

button.

In Summer mode the central heating has been shut off while DHW remains active. Summer mode can be activated by pressing the button. again after activating the boiler. On the display [So], [Su] or [Et] appears (the code on the display depends on the setting of

parameter q).

Summer mode can be deactivated by pressing the button twice. The boiler will then be in

normal functional mode again.

Tap comfort

The tap comfort function can be operated with the tap comfort button and has the following settings:

•

On: ( LED on) The tap comfort function of the unit is continuously switched on. The heat exchanger is continuously kept warm. The unit always immediately provides warm water.

•

Eco: ( LED on) The tap comfort function of the unit is self-learning. The unit will adjust to the usage pattern of the domestic hot water. This means the heat exchanger will not be kept warm during the night or during longer absences.

•

Off: (Both LEDs off.) Off: The heat exchanger is not kept warm which means the supply of domestic hot water takes a bit of time. If there is no desire for domestic hot water, or of immediate supply hereof, the tap comfort function can be switched off.

Resetting

Check the nature of the malfunction on the basis of the malfunction codes under par. 8.1 and if possible, resolve the cause of the malfunction before resetting the unit.

If a locking malfunction is indicated by means of a flashing LED above the button and a number on the display, the unit can be restarted by pressing the reset button.

Change settings of the various functions:

Pressing the button for 2 seconds, will take you to the users setting menu (LED at and the number display will start to flash). If you press the button repeatedly, a different function LED

will flash each time. When the LED flashes, the appropriate function can be set with the and

button. The set value is displayed on the display. The on/off button closes the settings menu and the changes are not saved. The reset button closes the settings menu and saves the changes. When no button is pressed for 30 seconds, the settings menu will automatically be closed and

the changes are saved.

Maximum CH supply temperature

Press the button until the LED at starts flashing. Use the and - button to enter the temperature between 30°C and 90°C

(standard setting 80°C).

Tap water temperature

Press the button until the LED at starts flashing. Use the and - button to enter the temperature between 40°C and 65°C

(standard setting 60°C).

) to show the unit is connected to the

7.2 Parameter settings via the service code

The parameters of the boiler controller have been configured in the factory in accordance with the following table.

These parameters can only be changed with the service code. Take the following actions to activate the program memory:

1. Press the and the button simultaneously, until a

2. Use the button to enter

3. Use the button to set the parameter you wish to configure, on the service display.

4. Use the and button to set the parameter to the required value (visible) on the temperature display.

5. After all the required changes have been entered, press the button until P appears on the service display. The boiler controller has now been reprogrammed.

Note Pressing the button will take you out of the menu without saving the parameter changes.

Example: Changing from ‘combi’ to ‘hot water only’

1. Press the and the button simultaneously.

2. Use the button to go to

3. Press the button 1 x. A 0 and a 1 will appear on the display.

4. Use the button to change the 0 to 2.

5. Press the button until P appears.

6. The change has now been implemented. The unit will only respond to a hot water request.

Para- RKOMB*AAV1H meter Setting 22 28 33 Description

0 Service code [15] - - - Access to installers settings, the service code must be entered

1 Installation type 0 0 0 0= combi

2 CH pump continuous 0 0 0 0= post-running pump only

3 Set maximum CH power 70 70 70 Setting reach set value parameter c up to 85%

3. Maximum capacity modulating CH pump 80 80 80 Setting reach set value parameter c. up to 100% 4 Set maximum hot water power 99 99 99 Setting reach set value parameter d up to 100% (=99 + 1x ) 5 Min. leaving water temperature of the fuel

line

5. Max setting value leaving water

temperature via operating panel

6 Min. outdoor temperature of the fuel line -7 -7 -7 Setting reach -30 to 10°C 7 Max. outdoor temperature of the fuel line 25 25 25 Setting reach 15°C to 30°C 8 CH pump post-running time after CH

operation

9 CH pump post-running time after boiler

operation

A Setting three-way valve or shut-off valve 0 0 0 0= powered during CH operation

b Booster 1 1 0 Not applicable

C Step-by-step modulation 1 1 1 0= step-by-step modulation off during CH operation

(service code) on the temperature display.

appears on the service display and a

(=15)

1= space heating + hot water by means of storage tank 2 = hot water only 3 = space heating only

1= pump continuously active 2 – 5 = not active

25 25 25 Setting reach 10°C to set value parameter 5

90 90 90 Setting reach 30°C to 90°C

1 1 1 Setting reach 0 to 15 minutes

(n/a for Combi unit)

1= powered during hot water operation and rest 2= three-way valve in CH setting if device not in rest 3= zone regulation 4 and higher = not active

1= step-by-step modulation on during CH operation 2= Power control by Open Therm room thermostat enabled

on the temperature display.

c Minimum rpm CH 30 30 30 Settings reach 20 – 50% c. Minimum capacity modulating CH pump 40 40 40 Setting reach 15 to set value par. 3. d Minimum rpm hot water 30 25 25 Settings reach 20 – 50% E Min. leaving water temperature at OT

(OpenTherm) or RF thermostat

E. Reaction OT and RF room thermostat 1 1 1 0= do not respond to hot water request if requested temperature

Start rpm CH 70 60 50 Settings reach 40 – 99% of the set maximum rpm

F. Start rpm hot water 70 60 50 Settings reach 40 – 99% of the set maximum rpm

h Max. rpm fan (* 100 rpm) 45 46 46 Settings reach 40 – 50 (factory setting)

n Regulated temperature during boiler

operation (Ta)

L Legionella protection 0 0 0 Not applicable (for Solo boilers with external DHW tank only) n. Hot water temperature at Comfort/Eco 0 0 0 Setting reach: 0 or 40°C – 60°C

O. Wait time CH request response 0 0 0 Settings reach 0 – 15 minutes o Waiting time CH operation after hot water

operation

o. Number of eco days 3 3 3 Settings reach 0, 1 -– 10

P Anti-recycling time during CH operation 5 5 5 Minimum switch off time on CH operation

P. Reference value hot water 2436 3036 36 0 = Flow switch applicable

q Summer mode 0 0 0 0 = Summer mode deactivated

r Heating curve coefficient 0 0 0 Not applicable

40 40 40 Settings reach 10 – 60°C

is lower than the set value par. E 1= respond to hot water request with minimum leaving water temperature limited to set value par. E 2= respond to hot water request with maximum leaving water temperature (on/off function)

This parameter can be used to set the maximum rpm

85 85 85 Setting reach 60°C - 90°C

0= reheating temperature is equal to hot water temperature

0 0 0 Settings reach 0 – 15 minutes

0 = Comfort function controllable by Open Therm room thermostat 1 – 10 number of eco days

Can be set to 0 - 15 minutes

24 = RKOMB22AAV1H 30 = RKOMB28AAV1H 36 = RKOMB33AAV1H

1 = Summer mode to be activated by button (code in display : Su) 2 = Summer mode to be activated by button (code in display : So) 3 = Summer mode to be activated by button (code in display : Et)

7.3 Setting maximum CH power

The maximum CH power is set to 70% in the factory. If more power is required for the CH installation, the maximum CH power can be changed by adjusting the rpm of the fan. See table: Setting CH power.

This table shows the relation between the rpm of the fan and the unit power.

Desired CH power in kW (approx.) Settings on service display

RKOMB*AAV1H

22 28 33

17.8 22.6 26.2

14.8 19.1 22.0

12.7 16.4 19.0

10.6 13.7 15.9 50

8.3 11.0 12.7

6.4 8.3 9.6

5.4 6.9 7.0

Caution:

The power is slowly increased when the fire is lit and is lowered when the set leaving water temperature is reached (modulation on Ta).

(in % maximum rpm)

± 83

70 60

40 30 25

7.4 Setting pump setting

The RKOMB*AAV1H CH boilers are fitted with a modulating A-class pump which modulates on the basis to the CH power provided. The minimum and maximum capacity of the pump can be adjusted with the parameters 3 and c. Also see par. 7.2. The set value of parameter 3. (max. pump setting) is the percentage of the maximum pump capacity and is linked to the set maximum CH power as set with parameter 3

The set value of parameter c. (min. pump setting) is linked to the minimum CH-power as set with parameter c

If the CH load modulates between the minimum and maximum value, the pump capacity will modulate along proportionately.

Pressure loss graph unit CH side

A. RKOMB22AAV1H B. RKOMB28AAV1H C. RKOMB33AAV1H

7.5 Weather dependent regulation

When connecting an outdoor sensor, the leaving water temperature is automatically regulated dependent on the outdoor temperature, in accordance with the set fuel line.

The maximum leaving water temperature (T max) is set via the display. If so desired, the fuel line can be changed by using the service code (see par.7.3).

Fuel line graph

X. T outside in °C Y. T leaving water in °C

A. Factory setting

(Tmax CH = 80°C, Tmin CH = 25°C, Tmin ex = -7°C, Tmax ex = 25°C)

B. Example

(Tmax CH = 60°C, Tmin CH = 25°C, Tmin ex = -7°C, Tmax ex = 25°C)

7.6 Conversion to different type of gas

CAUTION

Work on gas carrying parts may only be carried out by a certified installer.

If a unit is connected to a different type of gas than the one it has been set to by the manufacturer, the gas dosing ring must be replaced. Conversion sets for other types of gas are available to order.

Converting the dosing ring

1. Switch off the boiler and remove the plug from the socket.

2. Shut the gas valve.

3. Remove the front panel from the unit.

4. Loosen the coupling (A) above the gas block and turn the gas mixing tube (B) backwards.

5. Replace the O-ring (C) and the gas dosing ring (D) by the rings in the conversion set.

6. Reassemble it in reverse order.

7. Open the gas valve.

8. Check whether the gas couplings before the gas block are sealed.

9. Enter the plug in the socket and switch on the boiler.

10. Check whether the gas couplings after the gas block are sealed (during operation).

11. Now check the setting of the gas/air ratio (see par. 7.8).

12. Put a sticker of the configured gas type on top of the existing sticker at the gas block.

13. Put a sticker of the configured gas type at the type plate.

14. Return the front panel onto the unit.

7.7 Gas/air regulation

The gas/air regulation has been set at the factory and does not require any adjustments, in principle.

The setting can be checked by measuring the CO2 percentage in the combustion gases or by measuring the pressure difference.

In case of any disturbance, replacement of the gas block or conversion to a different type of gas, the regulation must be checked and set in accordance with the following table.

Gas type Natural gas H Propane P

Gas category

CO2% on Low setting (L) ( and ) With open cover CO2% at High setting (H) ( and 2x) With open cover Initial gas pressure (mbar) 20 50

2E/H G20

See par. 7.8

3P / G31

30 / 37 / 50

Gas dosing ring Natural gas H Propane P

RKOMB22AAV1H 600 480 RKOMB28AAV1H, RKOMB33AAV1H 655 525

CAUTION CO2 check must be carried out with open cover. If the cover is

shut, the CO2% may be higher than the values stated in the above table.

7.8 Setting gas/air regulation

percentage when the test program

The CO2 setting has been set at the factory and does not require any adjustments, in principle. The setting can be checked by measuring the CO2 percentage in the combustion gases. In case of any disturbance of the setting, the replacement of the gas valve or the conversion to a different type of gas must be checked, and if necessary set in accordance with the following instructions. Always check the CO2 percentage when the lid is open.

Checking the carbon dioxide setting

1 Switch off the heat pump module with the user interface. 2 Switch off the gas boiler with the button.

3 Remove the front panel from the gas boiler. 4 Remove the cover from the sample point (X) and enter an appropriate chimney analysis

probe.

IMPORTANT

Ensure the start-up procedure of the analysis machine has been completed before inserting the probe in the sample point.

IMPORTANT

Wait for the gas boiler to run stable. Faulty measurements may occur if the measuring probe is connected before the boiler is running stable.

appears on the service display.

5 Switch on the gas boiler with the button and create a request for space heating. 6 Select the High setting by twice pressing the and buttons simultaneously. A

capital letter "H" will appear on the service display. The user display will show a Busy symbol. Do NOT carry out a test when a small letter "h" is shown. If this is the case, press and again.

7 Allow the display values to stabilize. Wait at least 3 minutes and compare the CO2

percentage to the values in the following table.

CO2 value at maximum power

Maximum value 9.6 10.8 Minimum value 8.4 9.8

8 Note the CO2 percentage at maximum power. This is important in relation to the

following steps.

9 Select the High setting by once pressing the and buttons simultaneously. "L"

10 Allow the display values to stabilize. Wait at least 3 minutes and compare the CO2

CO2 value at minimum power

Maximum value (a) Minimum value 8.4 9.4

IMPORTANT It is NOT possible to adjust the CO2

is being carried out. If the CO2 percentage deviates from the values in the above table, contact your local service department.

appears on the service display. The user display will show a Busy symbol.

percentage to the values in the following table.

(a) CO2 value at maximum power registered at setting High.

Natural gas G20

(20 mbar)

Natural gas G20

(20 mbar)

Propane G31

(30/37/50 mbar)

Propane G31

(30/37/50 mbar)

11 If the CO2 percentage at maximum and minimum power is within the reach stated in the

03010102

above tables, the CO2 setting of the boiler is correct. If NOT, adjust the CO22 setting in accordance with the instruction in the following chapter.

12 Switch off the unit by pressing the button and return the sample point to its position.

Make sure it is gas tight.

13 Return the front panel to its place.

CAUTION

Work on gas carrying parts may ONLY be carried out by qualified, competent individuals.

Adjusting the carbon dioxide setting

IMPORTANT Only adjust the CO2 setting when you have first checked it and you have made

sure the adjustment is necessary. No adjustments may be made to the gas valve without prior permission from your local Rotex distributor. In Belgium, the gas valve may NOT be adjusted and/or the seal may NOT be removed or broken. Contact your distributor.

1 Remove the cap (A) which covers the adjuster screw. 2 Turn the screw (B) to the right to increase the CO2 percentage, and to the left to

decrease it. See the following table for the desired value.

Measured value at maximum power

10.8 - 10.5±0.1

10.6 10.3±0.1

10.4 10.1±0.1

10.2 9.9±0.1 10 9.8±0.1

9.8 9.6±0.1

9.6 9.0±0.1 -

9.4 8.9±0.1

9.2 8.8±0.1

9.0 8.7±0.1

8.8 8.6±0.1

8.6 8.5±0.1

3 After measuring the CO2 percentage and adjusting the setting, replace the cover

cap and the cap of the sample point. Make sure they are gas tight.

4 Select the High setting by twice pressing the and buttons simultaneously.

A capital letter will appear on the service display.

5 Measure the CO2 percentage. If the CO2 percentage still deviates from the

valuesin the table which indicates the CO2 percentage at maximum power, contact your local distributor.

6 Press + and - simultaneously to leave the test program. 7 Return the front panel to its place.

Set values CO2 (%) at minimum power (front lid open) Natural gas 2H (G20, 20 mbar)

Propane 3P (G31,30/50/37 mbar)

8 MALFUNCTIONS

•

8.1 Show last malfunction

Use the key to switch the unit off, and press the button. The red malfunction LED is lit continuously, and the latest fault code is shown flashing on the temperature display. If the unit has never detected a locking malfunction, no code will be displayed. The last locking malfunction can be deleted by briefly pressing the button while pressing the button.

8.2 Malfunction codes

If the malfunction LED is flashing, the boiler controller detects a fault. A malfunction code will be shown on the temperature display.

When the malfunction is rectified, the boiler controller can be restarted by pressing the reset button. The following faults can be distinguished:

Temperature display Description Possible cause/solution

10, 11, 12, 13, 14 Sensor fault S1

20, 21, 22, 23, 24 Sensor fault S2

0 Sensor fault after self-check 1 Temperature too high

2 Switch S1 and S2

4 No flame signal

5 Poor flame signal

6 Flame detection error

8 Fan rpm is not correct

27 Short circuit outdoor sensor

29,30 Gas valve controller fault

Only replace faulty parts with the original Rotex parts. Failing to fit or incorrectly fitting the sensors S1 and/or S2 may lead to serious damage.

•

Unit is off.

•

Air in the installation. Purge the air from the boiler and CH installation.

•

Check the connection of ntc on the hot water tube.

•

Check wiring for break.

•

Replace S1.

•

Check wiring for break.

•

Replace S2.

•

Replace S1 and/or S2.

•

Air in installation. Purge the air from the boiler and CH installation.

•

Pump is not running. Insert a screwdriver into the slot of the pump shaft and turn the shaft. Check the wiring between the pump and the boiler controller.

•

Too little flow in installation, closed radiators, pump setting too low.

•

Check cable harness.

•

Replace S1 or S2.

•

Main gas valve not opened.

•

Gas supply pressure too low, or disappears.

•

Condense output blocked.

•

Check ignition unit and ignition cable.

•

No or incorrect ignition distance.

•

Gas block or ignition unit is not receiving electrical current.

•

Check earthing.

•

Condense output blocked.

•

Gas supply pressure too low, or disappears.

•

Check ignition unit and ignition cable.

•

Check setting of gas block.

•

Check earthing.

•

Check air supply and gas output for possible recirculation of flue gases.

•

Replace ignition cable + spark plug.

•

Replace ignition unit.

•

Replace boiler controller.

•

Fan is coming up against cover insulation.

•

Wiring between fan and cover.

•

Check the wiring for faulty contact wire.

•

Check and/or replace fan.

•

Replace boiler controller.

Check the wiring of the outdoor sensor.

• Replace outdoor sensor.

•

boiler controller is not suitable for this application.

•

Replace boiler controller for the appropriate version.

•

Replace boiler controller.

8.3 Other faults

8.3.1 Boiler controller is noisy when igniting

Possible causes: Solution:

Gas supply pressure too high. Yes  The home pressure controller may be faulty. Contact the energy company.

No 

Incorrect ignition distance. Yes 

No 

Gas/air regulation not correctly configured. Yes  Check the setting, see gas/air regulation.

No 

Weak spark.

Yes 

Checking mold ignition pin position

Check the ignition pin distance. Replace the ignition pin.

Check the ignition distance. Check and/or replace ignition cable. Replace the ignition unit on the gas block. Replace the ignition pin.

Pin must touch test tool Pin must not touch test tool

8.3.2 Boiler controller resonates

Possible causes: Solution:

Gas supply pressure too low. Yes  The home pressure controller may be faulty. Contact the gas company.

No 

Recirculation combustion gases. Yes  Check the combustion gas outlet and air supply.

No 

Gas/air regulation not configured correctly. Yes  Check the setting, see gas/air regulation.

No 

Boiler controller gasket faulty. Yes  Replace the boiler controller gasket.

No 

Boiler controller faulty. Yes  Replace the boiler controller.

8.3.3 No heating (CH)

Possible causes: Solution:

The service display shows a hyphen ( The boiler is off.

Yes 

No 

Room thermostat/weather dependent regulation not closed or faulty.

Yes 

No 

Pump is not running. Display shows 80 and 1. Yes 

No 

No electrical supply (24 V). Yes 

Switch on the boiler with the button.

Check the wiring. Check OpenTherm and On/off connection of the unit. Replace the thermostat. Replace the weather-dependent regulation.

Check the electricity supply. Check connector X2. Insert a screwdriver into the slot of the pump shaft and turn the shaft. Replace faulty pump.

Replace the faulty controller. Check the wiring in accordance with the diagram. Check the connector X4. Replace the faulty conroller.

8.3.4 The power is reduced

Possible causes: Solution:

At a high level of rpm, the power has decreased by more than 5%.

Yes 

Check the unit, siphon and output system for contamination. Clean unit, siphon and output system.

8.3.5 CH is not reaching correct temperature

Possible causes: Solution:

Water pressure in installation is too low Yes  Fill up the installation.

No 

Setting of room thermostat is not correct. Yes  Check the setting and adjust if required.

No 

Temperature is set too low. Yes 

No 

Pump does not run properly. Pump setting is too low.

No 

No flow through the installation. Yes 

No 

The boiler power is not set for the installation. Yes  Adjust the power. See Setting maximum CH power.

No 

No heat transfer due to contamination in the exchanger/installation.

Yes  Increase the pump setting or replace the pump.

Yes  Rinse the exchanger/installation on the side of the CH.

Increase the CH temperature. See Operation CH. If there is an outdoor sensor: Check the outdoor sensor for short circuit: rectify this.

Check whether there is a flow through the installation: at least 2 or 3 radiators must be open.

8.3.6 No domestic hot water

Possible causes: Solution:

The service display shows nothing. Yes  Check whether the plug is in the socket.

No 

The service display shows nothing. Yes  Check the fuse, see Electrical diagram par. 10.1

No 

Flow sensor does not work. Yes  Replace the flow sensor.

No 

Tap flow < 1,5 l/min. Yes  Increase the tap flow.

No 

No electricity supply on flow sensor (5V DC). Yes  Check the wiring in accordance with the diagram.

No 

S3 faulty. Yes  Replace S3.

No 

The thermostatic shower or bath tap is faulty. Yes 

The thermostatic tap only lets through cold water. This means the tap flow through the boiler remains under 1,5. l/min. Check the thermostatic tap.

8.3.7 DHW is not reaching the correct temperature

Possible causes: Solution/cause:

Tap flow too high. Yes 

No 

CH becomes hot during tapping. Yes 

DHW temperature set too low. Yes  Increase the DHW temperature, see par. 7.1.

No 

Insufficient heat transfer due to lime scale or contamination in the CH boiler on the tap water

Yes  Remove lime scale or rinse the CH boiler on the tap water side.

Reduce the tap flow. Check the dosing disk (RKOMB22AAV1H and RKOMB28AAV1H)

Unwanted circulation in the CH circuit due to thermosiphon effect or second pump in the CH circuit. Install a check valve in case of thermosiphon effect or a two-way valve in case of a second pump.

side.

8.3.8 CH installation stays warm unwanted

Possible causes: Solution/cause:

Check the wiring. Room thermostat/weather dependent regulation faulty or short circuited.

No 

CH installation is heated due to Tap comfort. The service display regularly shows code 7.

Yes 

Check OpenTherm and On/off connection of the unit.

Replace the thermostat.

Replace the weather-dependent regulation.

Unwanted circulation in the CH circuit due to thermosiphon effect or second pump in

the CH circuit. Install a check valve in case of thermosiphon effect or a two-way

valve in case of a second pump.

8.3.9 A-label pump LED flashes intermittently red/green

Possible causes: Solution:

Too high or too low mains voltage. Yes  Check the mains voltage.

No 

Pump temperature is too high. Yes  Check the water and ambient temperature.

8.3.10 A-label pump LED flashes red

Possible causes: Solution:

Reset the pump by switching off the unit by pressing the on/off button for at least 20

Pump stopped. Yes 

seconds (attention: if the pump has been set to continuous, the pump can only

be reset by pulling the plug from the socket).

Replace the pump.

9 MAINTENANCE

The unit and the installation must be checked by a certified installer, and cleaned if necessary.

CAUTION

Work on gas carrying parts may only be carried out by a certified installer. After work, check the flue gas carrying parts for air tightness. If the unit has just been operational, some parts may be hot.

9.1.1 Disassembly

1. Switch the unit off with the button.

2. Remove the plug from the socket.

3. Shut the gas valve.

4. Open the display valve and loosen the two screws on the left and right of the display, and remove the front panel.

5. Wait until the unit has cooled down.

6. Unscrew the coupling nut at the bottom of the flue tube to the left.

7. Slide the flue pipe upwards (1) with a turn to the left until the bottom of the pipe reaches above the coupling of the condense outlet container. Pull the bottom of the pipe forward (2) and remove the pipe by rotating it to the left and down (3).

8. Lift the condense outlet tray from the connection of the siphon (4) on the left, and turn it to the right with the siphon connection over the edge of the lower tray (5). Push down the condense outlet tray at the back from the connection to the heat exchanger (6) and remove it from the unit.

9. Take the connector from the fan and the ignition unit from the gas block.

10. Disconnect the coupling under the gas block.

11. Unscrew the shouldered bolts (Allen bolts) of the front lid and remove it to the front, complete with gas block and fan (be careful not to damage the boiler controller, insulation plate, gas block, gas pipe and fan). Lay the removed front lid with the foot rests horizontally on a flat surface.

12. The boiler controller and the integrated insulation plate do not require any maintenance (do not need cleaning). Therefore never use a brush or compressed air to clean these parts, in order to avoid dust developing.

13. Disassemble the dam strips which are positioned across the plates of the heat exchanger.

9.1.2 Cleaning

1. Clean the retarders and the plates of the heat exchanger with a brush or vacuum cleaner, from top to bottom.

2. Clean the bottom of the heat exchanger.

3. Clean the condense outlet tray with water.

4. Clean the siphon with water.

5. Only clean the bottom of the front plate.

CAUTION

The integrated insulation plate and

boiler controller

gasket

contain ceramic fibers.

9.1.3 Fitting

03010078

03010083

During maintenance the seal front plate needs to be replaced. When assembling, check the other seals for damages,

hardening, (hairline) fractures and/or discoloration. Where necessary, place a new seal. Also check the correct positioning.

If retarders are not fitted, or incorrectly fitted, it may lead to serious damage.

1. Place the retarders in the heat exchanger.

2. Check that between the flange of the shoulder bolt and the front plate, there is a thin layer of ceramic grease. If there is no or insufficient grease, it must be applied (see image).

3. Check whether the seal around the front plate has been fitted correctly. Place the front plate on the heat exchanger and secure it with the special shoulder bolts (Allen bolts). Evenly tighten the shoulder bolts crosswise manually (10 – 12 Nm). For the sequence of tightening, see image. Please note: The front plate in the image has 11 shoulder bolts (RKOMB28AAV1H, RKOMB33AAV1H). The front plate of the RKOMB22AAV1H has 9 shoulder bolts.

4. Evenly manually tighten the boiler controller bolts crosswise.

5. Fit the gas coupling under the gas block.

6. Fit the connector onto the fan and the ignition unit onto the gas block.

7. Fit the condense outlet tray by sliding it into the outlet stump of the switcher (1), with the siphon connection, before the lower tray. Then turn the condense outlet tray to the left (2) and push it down into the siphon connection (3). Make sure that the rear of the condense outlet tray ends up resting on the tab at the back of the lower tray (A).

8. Fill the siphon with water and fit it onto the connection under the condense outlet tray.

9. Slide the flue gas pipe, while turning it to the left, with its top around the flue gas adapter in the top lid. Insert the bottom into the condense outlet tray, drag the gasket down and tighten the swivel nut to the right.

10. Open the gas valve and check the gas couplings under the gas block and on the assembly bracket for leakage.

11. Check the CH and the water pipes for leakage.

12. Insert the plug into the socket.

13. Switch the unit on with the button.

14. Check the front lid, the connection of the fan to the front lid and the flue tube parts for leaks.

15. Check the gas-air regulation (see par. 7.7 ) and check the gas coupling on the gas block for gas tightness.

16. Assemble the cover and tighten the two screws to the left and the right of the display, and close the display cover.

17. Check the heating and the hot water provision for correct functioning.

10 TECHNICAL SPECIFICATIONS

Model name RKOMB22AAV1 H RKOMB28AAV1 H RKOMB33AAV1 H

Condensing boiler Yes Yes Yes Low temperature boiler No No No B1 boiler No No No Combination heater Yes Yes Yes

Domestic water

Nom. load upper value, Qn (Hs) kW 6,2 – 24,6 7,9 – 31,1 8,0 – 36,3 Nom. load lower value, Qn (Hi) kW 5,6 – 22,1 7,1 – 28,0 7,2 – 32,7 Domestic water threshold l/min 2 Domestic water quantity 60°C l/min 6 7,5 9 Domestic water quantity 40°C (mixed) l/min 10 12,5 15 Domestic water temperature °C 60 Domestic water side pressure difference kPa See par. 5.2

Nom. load upper value, Qn (Hs) kW 6,2 – 24,6 7,9 – 31,1 8,0 – 36,3 Nom. load lower value, Qn (Hi) kW 5,6 – 22,1 7,1 – 28,0 7,2 – 32,7 Nom. output Pn kW 2 Max. CH water pressure PMS bar 3 Max. CH water temperature °C 90

Other data

Gas consumption G25 Gas consumption G20 Gas consumption G31 Pressure loss of the unit (CH) mH2O See par. 7.4 Max. Flue gas temperature DHW °C 90 90 90 Mass.flow flue gas (max) g/s 10,3 13,0 14,9 Available fan pressure Pa 75 75 75 NOx class 6 6 6 NOx mg/kWh 33 34 34 P1, at 30% of Rated input (30/37) kW 6,0 7,7 8,9 P4, Rated output (80/60) kW 17,8 22,8 26,3

ɳ 1, Efficiency at P1 ɳ 4, Efficiency at P4

Standby heat loss, Pstby Daily fuel consumption, Qfuel kWh 14,691 23,45 23,393 Daily electricity consumption, Qelec kWh 0,064 0,075 0,074

Electrical data

Mains voltage V 230 Safety class IP IPX4D, (B23, B33 = IP20) Absorbed power: full load W 80 Absorbed power: standby W 2 Auxiliary electricity consumption at full load (elmax) kW 0,035 0,035 0,035 Auxiliary electricity consumption at part load (elmin) kW 0,015 0,015 0,015 Auxiliary electricity consumption in stand by mode (Pstby) kW 0,002 0,002 0,002

Installation measurements and weight

Height mm 590 650 710 Width mm 450 Depth mm 240 Weight kg 30 33 36

(1)

m3/h 0,67 – 2,65 0,85 – 3,36 0,86 – 3,93

(1)

m3/h 0,58 – 2,29 0,74 – 2,91 0,75 – 3,39

(1)

m3/h 0,22 – 0,87 0,28 – 1,11 0,28 – 1,29

% 96,4 97,1 97,7 % 85,9 86,6 86,9

kW 0,037 0,037 0,038

Gas category

(1)

(EN 15502) B23; B33; C13x; C33x; C43x; C53x; C63x; C83x: C93x

Destionation country Boiler categorie (EN437) Gas type and gas inlet pressure (EN 437)

IT II2H3P G20, 20 mbar, G31: 37 mbar FR II2Esi3P G20, 20 mbar, G31: 37 mbar BE I2E(S) G20, 20 mbar, G25: 25 mbar PL II2E3P G20, 20 mbar, G31: 37 mbar CZ II2H3P G20, 20 mbar, G31: 37 mbar ES II2H3P G20, 20 mbar, G31: 37 mbar

(1)

G20 – Natural gas E/H

G25 – Natural gas LL/L G31 – Liquefied Propane gas

10.1 Technical Product Fiche in accordance to CELEX-32013R0811

Supplier

Type designation

Seasonal space heating energy efficiency class

- - A A A

Rotex Heating Systems GmbH

RKOMB22AAV1 H RKOMB28AAV1 H RKOMB33AAV1 H

Langewiesenstraße 10

D-74363 Güglingen

Heat rated output

Annual energy consumption

Seasonal space heating energy efficiency

Sound power level

Declared load profile

Water heating energy efficiency class

Annual electricity consumption

Annual fuel consumption

Water heating energy efficiency

rated

QHE GJ 37 46 51

ηS % 91 92 93

LWA dB 45 45 45

- - L XL XL

- - A A A

AEC kWh 14 16 16

AFC GJ 12 18 18

ηWH % 78 81 81

kW 18 23 26

Efficiency class controller II II II

Contribution to yearly efficiency % 2,0 2,0 2,0

IMPORTANT

• Please read all instructions before fitting this appliance.

• This appliance is not intended for use of persons (including children) with diminished physical, sensory or mental ability, or lack of experience and

knowledge, unless supervised by, or instruction about the use of the appliance by a person who is responsible for their safety.

• The appliance and installation should every year be inspected by an qualified installer and cleaned when necessary.

• The appliance can be cleaned with a damp cloth. Don’t use aggressive or abrasive cleaning- or solvent

10.2 Electrical diagram RKOMB22AAV1 H, RKOMB28AAV1 H & RKOMB33AAV1 H

Flow temperature

Return

temperature

Earth connection exchanger Ignition plug

C Boiler controller

Earth connections

Fuse (3.15 A T) Gas block + ignition module

Ignition/ionization pin

Mains electricity supply

CH pump

Resistance

sensor

S3 S5

DHW sensor Mass flow sensor

CH water pressure sensor

Fan

Connector X4

24V=

6-7

8-9

11-12

Connector X2

230V

7-8

3-5-6

Connector X5

5 -

2-4

CH pump (5= PWM signal (red), E=earth)

On/off room thermostat

Outdoor sensor

(0.1A-24Vdc) and/or frost thermostat

(12 kOhm / 25°C)

OpenTherm room thermostat

Mains supply 230 V (2 = L (brown), 4 = N (blue))

CH pump

(8 = L (brown), 7 = N (blue)

Shut-off valve underfloor heating

(e.g. EK3WV1AA)

Computer interface

(6-7 should be open)

(3 = L (brown), 5 = Switch (black), 6 = N (blue)

10.3 NTC resistances

NTC 12 kOhm T [°C] R [ohm] T [°C] R [ohm] T [°C] R [ohm] T [°C] R [ohm]

-15 76020 15 18300 45 5522 75 1994

-10 58880 20 14770 50 4609 80 1717

-5 45950 25 12000 55 3863 85 1467 0 36130 30 9805 60 3253 90 1266 5 28600 35 8055 65 2752 95 1096 10 22800 40 6653 70 2337 100 952

11 WARRANTY CONDITIONS

If the unit is due for replacement, it can usually be taken

The general warranty conditions of Rotex Heating Systems GmbH apply to this product.

The warranty is void if it is determined that the faults, damages, or undue wear are attributable to improper use or inexpert treatment or inexpert repair, setting, installation or maintenance, by non-certified installers, or that it was exposed to substances with aggressive chemicals (incl. hair spray) and other damaging substances.

The warranty also becomes void when pipes and couplings have been applied in the installation which may cause oxygen diffusion, or the defect is a consequence of lime scale (damaging to the unit and installation). Surface damage as well as transport damage is included under the warranty. The entitlement to warranty becomes void if it cannot be proven that the CH boiler has been subjected to maintenance by a certified installer at least once a year from the commissioning date. The instructions for installation and use which we provide for units must be followed in full.

Environment

back by your dealer, following consultation. Should this not be possible, consult your council for the possibilities for recycling or environmentally friendly processing of used materials.

Various plastics and metals were used in the manufacturing of the unit. Furthermore, the unit contains electrical components which belong with electronic waste.

Use as intended

The unit, as described in this documentation is intended for heating spaces via a central heating installation and/or the supply of hot water. Any other usage falls outside the intended use of the unit. No liability can be accepted on damage arising from incorrect use.

ROTEX • 008.1549099_01 • 88553804 • 11/2019

Daikin RKOMB22AAV1H, RKOMB28AAV1H, RKOMB33AAV1H Installation manuals

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