rotex a1 bg

R O T E X A 1 B G I n l i n e :G a s C o n d e n s i n g B o i l e r .

I n s t a l l a t i o n a n d M a i n t e n a n c e I n s t r u c t i o n s f o r o p e r a t i o n b y s p e c i a l i s t s .

Type Output

ROTEX A1 BG 25i 5 – 25 kW

ROTEX A1 BG 40i 8 – 40 kW

Product Number

Customer

DE

T a b l e o f C o n t e n t s

Safety Instructions 3Conditions of Warranty 3Declaration of Conformity 3

Chapter 1: Set-up and Installation

Installation Variants 4Shipment 5Delivery Condition 5Place of Installation 5Water Connection 5Flue Gas and Air Supply Connection 6Installation Variants 6Description of the Installation Variants 10Connecting the Condensate Drain 10Connecting the Temperature Sensor 10Connecting the Pumps 11Electrical Installation 11Connecting the Gas Pipe 11Initial Operation 12Testing the Safety Temperature Limiter 12Checklist 13List of the Norms and Guidelines to be Observed 13

Chapter 2: The Boiler Control Panel

Summary 14Electrical Fuse 15Safety Temperature Limiter 15Testing the STL 15Manual Adjustment of Boiler Temperature 15Replacing the Boiler Control Panel 16Replacing the Control System 16

Chapter 3: The Control System

Summary 18Operation Mode Selection Switch 18Continual Daytime Operation 18Processing of Sanitary Water 18Manual Operation 18Time Programmes 18Set Temperature for Normal Operation 18Set Temperature for Low Operation 19The Display 19Displaying the Storage Tank Temperature 19Displaying the Mixer Circuit Flow Temperature 19Displaying the Outdoor Temperature 19Displaying the Room Temperature 19Displaying the Time 19Display of Faults 19

The Parameters of the Control System 20Displaying and Adjusting the Parameters 20Parameters for Heating Specialists 20Steepness of the Heating Curve 20Hot Water Set Value 21Legionella Protection 21Reduced Operation 21Summer Shut-off 21Maximum Boiler Temperature 21Mixer – Minimum Temperature 21Mixer – Maximum Temperature 21Daylight Saving Time Switch 21Minimum Running Time of Burner 21Reset 22Operation Hour Counter 22Burner Start Counter 22Type of Operation 22Leaving the Heating Engineer Mode 22Activating and Deactivating Sensors 22Flowchart of Parameter Adjustments 23Setting the Time 24Setting Individual Time Programmes 25

Chapter 4: The Gas Burner

Gas Burner 26Summary 27Resetting the Burner 27Burner Output 27Limiting the Maximum Burner Output 27Limiting the Minimum Burner Output 27Integrated Gas/Air Regulating Device 27Adjusting the Burner and Type of Gas 27Adjusting the Ignition and Ionisation Electrodes 28

Chapter 5: Integrated Connection Group

Installation 29Functioning 29Electrical Installation 29Technical Data 29

Chapter 6: Maintenance and Cleaning

Removing the Sound Insulation Cap 30Removing the Boiler Casing 30Removing the Insulation Mould Parts 30Opening the Combustion Chamber 30Cleaning the Combustion Chamber and the Burner 31Most Important Steps 31Checking the Connections 31

Cleaning the Burner Panelling 31Troubleshooting 31

Chapter 7: Hot Water Tank

Hydraulic Diagrams 32Technical Data 33

Chapter 8: Technical Data

Switch Plan 34Firing Device 35ROTEX A1 BG Inline 35

[ 2 ]

DECLARATION OF CONFORMITYfor the condensing boiler central heating systemsROTEX A1 BG 25i and ROTEX A1 BG 40i

We, ROTEX GmbH, declare on our own responsi-bility that the products

Product Order-No.ROTEX A1 BG 25i 15 56 00ROTEX A1 BG 40i 15 56 01both comply to the following European guidelines:89/336/EWG Electromagnetic Compati-

bility96/396/EWG EG Machine Guideline73/23/EWG EG Low Voltage Guideline92/42/EWG EG Efficiency GuidelineIn order to assure compliance with the regulationsof the guidelines, the following norms have beenadhered to:DIN 4702-1; DIN EN 303-1; pr EN 483; pr EN 677; VDE 0722; DIN VDE 0116; EN 55104; EN 61000-4-2; EN 61000-4-4; ENV 50142; ENV 50141; DIN EN 6100-4-11; EN 55014; DIN VDE 0875-14; EN 61000-3-2;EN 61000-3-3.

Güglingen, 1st April, 2001 Dr.-Ing. Franz Grammling

Warranty period for the burner: 1 year.Warranty period for the electrical parts of theboiler: 2 years.Warranty period for the body of the boiler: 10years.

Disqualification from the WarrantyAny tampering with the appliance and anyimproper modifications result in an immediateineligibility for all warranty claims.Damage during shipment and transportationare not included in the warranty.The warranty excludes all subsequent costs, inparticular removal and re-installation costs.No claims for parts subject to wear and tear(according to the definition of the manufactu-rer), such as burner nozzles, lamps, switches,flue gas connection, fuses, will be honoured.

S a f e t y I n s t r u c t i o n s a n d S t a t e m e n t o f W a r r a n t y

When working on the heating system, makesure that the main switch is in the off posi-tion at all times and secured against acci-dental switching on.

Only authorised and properly trained specia-lists (heating specialists) may perform workon the heating system.

The minimum distances to walls and otherobjects, stated in chapter 1, must be obser-ved unconditionally.

The correct installation of the temperaturesensors and the safety temperature limi-ter must be checked before starting up theboiler for the first time.

Operating the A1 without heat insulationand/or casing is not allowed (fire hazard).

Before connecting to the power-supplyline, compare the main voltage (240 V 50 Hz), stated on the type label, with the vol-tage of the supply line.

The heating system must be constructed incompliance with technical safety regulations,as described in DIN 4751 for an open system(DIN 4751 part 1) or a closed system (DIN 4751 part 2) and strictly in accor-dance with Corgi recommendations. Thistechnical documentation is based on EN andDIN standards. These Standards can vary fromthe country usual standards. In these cases thestandards of the respective country are valid.For example in UK: CORGI REGULATIONS.

Safety valves must be properly checked andmust meet the requirements of TRD 721. Theblow-off output must correspond to therated heating output of the A1.

For closed systems in compliance with DIN4751 part 2, only use safety valves with an“H” on the parts check seal. They must bebuilt into the safety flow.When filling the heating system and putting itinto operation, follow VDI 2035.

ROTEX A1 has been checked and approvedaccording to DIN-EN 303, pr. EN 667, and pr.EN 483.When installing a gas heating system, youmust observe the regulations described inTRGI G 600 and the regulations of your gassupply firm.

The gas connection pressure must lie between5 and 55 mbar.

The electrical installation must be carriedout by authorised specialists in compliancewith current VDE guidelines. In addition, theregulations of your electricity providermust be taken into account.

Only waste gas mechanisms approved for usewith condensing boilers may be used.

The gas data on the boiler label of themechanism should be compared with connec-tion data provided by your gas supply firm.Seals should not be removed or damaged.

ROTEX assumes responsibility for faults inmaterials and fabrication when the product isused in accordance with these warranty condi-tions.

General Regulations for the Warranty

During the warranty period, ROTEX commitsitself to having the appliance repaired free ofcharge by a specialist under contract by thecompany.ROTEX reserves the right to supply a replace-ment for the product instead of repairing it. Awarranty claim can only be honoured if it canbe proved that the appliance was installedproperly by an authorised specialist. As evi-dence we strongly recommend that the enclo-sed installation and instruction form be filledout and sent back to ROTEX.

Warranty PeriodThe warranty period begins with the day ofinstallation (date on the receipt of the com-pany performing the installation), but no laterthan 6 months after the day the appliance wasmanufactured (date of invoice). The warrantyperiod is not extended when the appliance istaken back for repair or replacement.

[ 3 ]

Remark:The discharge height of the discharge pipe shouldnot lie above the lower edge of the waste gas pipe.If you install the unit with a private reservoir, planfor a boiler platform with a height of at least 80 mm.

These instructions should be readcarefully before you begin installation.Please contact our technical customerservice department if you have any que-stions. The installation, connection, and

initial operation must be carried out byauthorised specialists. Improper installa-tion and tampering with the applianceresult in ineligibility for the warranty.

C h a p t e r 1 : S e t - u p a n d I n s t a l l a t i o n

[ 4 ]

1. boiler return 1 1/4 " male / 1” female2. boiler flow 1 1/4 " male / 1” female3. KFE filling and drain spigot 1/2 " female4. flue gas connection ø 805. Luftanschluss ø 506. air supply line with LAS connection

set ø 807. gas supply line 1/2 “ female

8. conservator tank connection 1/2 " female9. hot water 3/4 " male

10. circulation 3/4 " male11. return heat exchanger 3/4 " female12. sensor pocket13. flow heat exchanger 3/4 " female14. cold water 3/4 " male

fig. 1.1: side view of installation variants

fig. 1.2: rear view of installation variants

A1 BG 25i on the US 150 A1 BG 25i on a baseA1 BG 25i on the floor A1 BG 40i on the floor

A1 BG 25i on the US 150 A1 BG 25i on a baseA1 BG 25i on the floor A1 BG 40i on the floor

[ 5 ]

Shipment

The A1 is delivered on a disposable pallet. Allindustrial vehicles, such as elevating trucksand fork-lifts, are suitable for shipment. Theboiler must not be lifted or pushed by thecasing. Use the 2 straps on either side of thepackage to lift the boiler and pallet.

Delivery Condition

ROTEX A1 BGi boilers are already completelyassembled upon delivery. The output of theboilers modulates within a range of 5-25 kWwith the A1 BG 25i and 8-40 kW with the A1BG 40i (see the chapter "The ControlSystem" for more information). All connec-tions are accessible without removal of thecasing.

Installation

Remove the packaging from the boiler andposition the boiler in the spot where it is to beinstalled. The measurements may be takenfrom figures 1.1 and 1.2. Connection pipesmust be fitted in such a way that the A1 canbe opened completely. The boiler must be in afully horizontal position. Irregularities in thefloor can be corrected by applying adjustablefeet to the boiler. Necessary tool: mid-sizedscrewdriver

Place of Installation

The boiler should not be operated in roomswith aggressive vapours (e.g. hairspray, perch-lor-ethylene, carbon tetrachloride), a high amo-unt of dust, or high humidity (e.g. laundryrooms) unless you have an air purificationsystem. There must be a ventilation opening ofat least 150 cm2 in the room. Tip: If you use aconcentric air purification system, you can dowithout the ventilation opening, and there areno further conditions on the place of installa-tion.

Water Connection

On the back of the A1 are two connectionswith 1 1/4 " male bzw. 1 " female (return seepos. 1, flow see pos. 2 in fig. 1.2). The A1uses the same flow and return for the heatingcircuit and the storage tank.

To connect the heating circuit and hotwater storage tank (e.g. ROTEX SANI-CUBE or US 150), the included connectionset (T-piece and reversing valve) must beassembled.

A 380 mm base can be ordered, order no. 15 30 20.

Low-water Safety Device

Tests have shown that the overheating safetydevice on the ROTEX A1 BGi shuts off andlocks the burner even when the water level islow. The low-water safety device required ofmanufacturers in DIN 4751-2, Feb. 1993 edi-tion, is thus not needed

Do not fill the heating system until all installa-tion work is finished. The filling and emptyingfitting (KFE spigot, pos. 3 in fig. 1.2) is on theback of the boiler on the right side and inclu-des a manometer. Connect a 1/2" hose to thefitting and secure the hose against slippingwith a hose clamp. Turn the fitting of the boileron (KFE spigot, pos. 3 in fig. 1.2) and begin fil-ling the unit with water until the manometerreading shows that there is approximately 1.5 (1.5 of what ??????bar atmospheres????)ofexcess pressure in the unit (green area). Takecare that no boiler water flows back into thedrinking water pipes. After completion of thefilling, the heating net must be vented out.Remark: All connections should be checkedfor tightness before operating the appliancefor the first time. In order to avoid corrosiveproducts and deposits, adhere to VDI 2035regulations. If the water used for filling andreplenishing the boiler has a particularly highdegree of hardness, measures should be takento stabilise or soften the water.Important: The water pressure should bechecked with the manometer (1.5 ± 0.5 bar) atregular intervals while the installation is inoperation and adjusted by replenishing thewater supply if necessary.Necessary tool: adjustable spanner.

a) connection dependent on room air (fig. 1.4)

b) connection independent of room air with separate air supply (fig. 1.5)

c) connection independent of room air with concentric air-flue gas system (fig. 1.6)

The flue gas must be released in the followingmanner:- by way of chimneys in compliance with DIN 18160

- by way of vertical flue gas lines with general building authorization of air waste gas systems

- by way of free standing chimneys (see DIN 4133 and DIN 1056)

- by way of exhaust shafts meeting the general requirements of flue gas mechanisms, in compliance with DIN 18017 part 1 (see section 6.3.1)

- by way of ventilation units in compliance withDIN 18017 part 3; this corresponds to the guidelines established in DVGW worksheet G 626

Installation Variants

Installation VariantsGenerally, the A1 BG 25i and A1 BG 40i condensing boilers can be installed in three different manners:They may be operated in a such a way thatthey use the air in the installation room ascombustion air (connection dependent on roomair), compare fig. 1.4 and pos. 2 in fig. 1.9. Itis necessary to install permanebtly ventilationopenings with a size of 1 x 150 cm2 or 2 x 75 cm2 in the installation room for thisinstallation variant (dependent on room air).

Flue Gas and Air Supply Connection

Fundamentals: The company connecting theflue gas pipe should get in contact with thechimney sweep responsible for the area. Evenin regions where this is not required by law,we recommend recording the participationof the chimney sweep on a written form.

The ROTEX A1 must be connected to thewaste gas mechanism on the storey the unit isinstalled on.

The flue gas pipe connection has a diameter of80 mm and is equipped with special acid-resi-stant seals. The measurements for thisconnection can be taken from fig. 1.3. A mini-mum distance of 400 mm between the fluepipe and the boiler is required if the flue gaspipe is not insulated.

Diameter of Connection:

In principle, the connection is possible on allflue gas lines suited for type B (allowed up to120 °C) and type C (allowed up to 160 °C)heating operations (not sensitive to humidity,tested for high pressure). A standard flue gasSTL is integrated. into the control panel forthis purpose. No other built-in safeguard isnecessary. We strongly recommend installingthe accompanying ROTEX flue gas pipe linemade of PP since it is equipped with specialacid-resistant seals. For the construction anddimensions of the flue gas system, consult thelocal building control authority

[ 6 ]

fresh air

out-going air

out-going air

fresh air

fresh air fromroom

out-going air

boiler side

DNin

take

air

DN

flue gas side

48

Aø 7

9,8

Aø 1

25

2

52

flue gas DN 80 socket end Iø = 80,8 mm + 0,3 Aø 79,8 mm ± 0,2intake air DN 125 socket end Iø = 125,5 mm + 0,5 Aø 125 mm - 1

fig. 1.3: measurements of the LAS connectiondes

[ 7 ]

Connection Independent of Room Air withConcentric Air-flue gas System

fig. 1.8: operation independent of room air with concentric air-flue gas connection

A concentric air-flue gas system acceptable for condensing boilers with a diameter of DN 80/125 is used as the air-flue gas line.Remarks: We strongly recommend using theaccompanying ROTEX flue gas lines since theyare equipped with special acid-resistant washers.The ROTEX LAS gas connection set is neededfor connection; order no. 154560 (not includedin the standard delivery package).

Operation Independent of Room Air withSeparate Air Supply

fig. 1.7: operation independent of room air with separate air supply

The air supply may be installed with pipesmade of synthetic material, ø 50 mm, or withflexible lines. For this method of installation,the burner must be adapted to operation inde-pendent of room air with the ROTEX LASconnection pipe, order no. 154561(not included in the standard delivery pack-age). A description of the necessary assemblysteps is included with the LAS connection set.Remark: The bolier room must contain a ven-tilation opening with a free cross-section of atleast 150 cm2 for this method of installation.

1) flue gas line ø 80 mm2) air supply line ø 50 mm3) Lventilation opening 150 cm2

4) LAS connection pipeorder no. 154561

1) concentric air-flue gas line2) ROTEX LAS gas connection set

order no. 155070

[ 8 ]

- All flue gas lines allowed for heating technology (types B and C) may be used

- a connection adapter may be needed!- condensation removal: observe regula-

tions set down by local water officials! Neutralisation is generally required with oil burners (integrated in the tank)!

ROTEX offers complete flue gas system kitswith all parts necessary for the various instal-lation variations.Fig. 1.10 displays the most important kits. For installation variants 1, 4, 5, and 6, the LAS gas connection set, order no. 155070,is also necessary.

maximal effective levels of the flue gas line in m:installation variant A1 BG 25i / DN 80 A1 BG 40i / DN 80

1 23 82 22 173 22 174 21 145 22 106 22 10

* longitudinally aired shaft with 90 min. of fire resistance; with buildings of a low height 30 min.

All of the installation variants are shown schematically in fig. 1.9.

operation dependent on room air

1 x 150 cm2

or 2 x 75 cm2

ventilationopening

operation independent of room airwith LAS connection set

AirFlue gas


operation partially inde-pendent of room air

operation independent ofroom air with LAS connec-tion set


rear ven-tilation

[ 9 ]

fig. 1.10: kits for synthetic (PP) flue gas system

Kit F PPD-F (order no. 155079.06)

Kit E PPE-E (order no. 155079.05)

if needed PPE-TS(order no. 155079.0002)

Kit D PPD-D (order no. 155079.04)

Kit B PPE-B (order no. 155079.02)

Kit G PPW-G (order no. 155079.07)

Kit C PPD-C(order no. 155079.03)

Kit A PPE-A(order no. 155079.01)

LAS-Connection Set necessary forinstallation variants 1, 4, 5, and 6-LAS1 for gas (order no. 155070)-LAS2 for oil (order no. 154560)

Roof Coverings for Kit FPPD-SD25 for roofs slanted 5-25°(order no. 155079.0014)PPD-SD45 for roofs slanted 25-45°(order no. 155079.0037)PPD-SD55 for roofs slanted 35-55°(order no. 155079.0012)PPD-FD15 for flat roofs and roofs slan-ted 0-15° (order no. 155070.0082)PPD-FD for flat roofs (order no.155079.0040)

Kits for Synthetic (PP) Flue Gas System

[ 10 ]

description of the installation variantsdisplayed in fig. 1.9.

Installation Variant 1

(operation independent of room air).The chimney or a special shaft allows air toenter from outside, which is then used as combustion air. The flue gas is released byway of a flue gas line (ø 80 mm) acceptable forcombustion heating. The line is run up to theroof through the same shaft used for airintake. The distance between the point wherethe smoke is released into the air and theridge of the roof must be at least 40 cm. Theboiler is connected with the LAS connectionset, order no. 15 50 70 (pos. 1 in fig. 1.9).


The flue gas is released as with variant 1, butthe combustion air is taken directly from theinstallation room. The installation room mustthus be properly ventilated (ventilation ope-ning: 1 x 150 cm2 or 2 x 75 cm2

(pos. 2 in fig. 1.9).


(operation independent of room air)The flue gas is released as with variants 1 and2, but the combustion air is procured by way ofa separate air canal from outside. If the aircanal is led through adjacent rooms, it must becapable of resisting fire for at least 90 minutes(pos. 3 in fig. 1.9).


(operation independent of room air)The heating boiler is connected to a concentricair-flue gas system with the LAS connectionset, order no. 15 50 70. This concentric pipeis run through the outer wall, ending at least40 cm above the surface of the roof. In the out-door portion of the pipe, the outer air gap ser-ves to insulate the flue gas pipe. The combu-stion air is taken from outside by way of a

T-piece on the outer pipe (pos. 4 a in fig. 1.9)or sucked in through the annular gap of thedouble pipe above the surface of the roof(pos. 4 b in fig. 1.9).


(operation independent of room air).The heating boiler is placed directly under theroof. The combustion air is led in and flue gasled out by way of a concentric double pipe.The inner pipe carries flue gas out while theouter annular gap sucks combustion air in fromoutside. There must be a distance of at least40 cm between the point where the flue gas isreleased and the surface of the roof. TheROTEX LAS connection set, order no. 15 50 70 (pos. 5 in fig. 1.9) is required for thisvariant.


(operation independent of room air).This variant is identical to variant 5, exceptthat the air-flue gas pipe is run through thetimberwork. In this area, the air-flue gas pipeis either led through a protective pipe withnecessary fire resistance or separated fromthe timberwork (pos. 6 in fig. 1.9).Please observe the guidelines in DIN 4705when installing the flue gas mechanism.Remark: The maximum back pressure of theflue gas is 200 Pa. The flue gas pipe should beat an angle of 30 to 45 degrees at the pointwhere it is led into the chimney.The mass of the flue gas flow is dependent onthe output level the burner has been set to.

Connecting the Condensate Drain

The included condensate siphon should beconnected to the condensate pipe. The con-densate pipe should be set at an angle whichallows the condensate to flow steadily into thewaste water system. The level of the flow inthe condensate siphon and pipe must liebelow the flue gas pipe at all points along theline so that there is no danger of the conden-sate clogging up the flue gas pipe.

Connecting the Temperature Sensor

The boiler features a weather sensitive regula-tion of the flow temperature. To use this func-tion, it is necessary to connect an outdoortemperature sensor. If you are also using ahot water storage tank, you will also need adomestic water temperature sensor (storagetank sensor). The outside sensor should beattached on the coolest side of the house(north or north-east) at about a third of theheight of the house (2 meter minimumdistance from the ground). Do not attachthe sensor near heat sources (chimneys, hotair from ventilation shafts, exposure to thesun, etc.) as this may have an effect on thereadings. The cable outlet should be alwaysbe directed towards the ground so that moi-sture cannot soak into it. For the electricalinstallation, a twin-core cable with a minimalsectional area of 1 mm 2 is prescribed. Theresistance of the sensor is 2000 Ω at 25°C(PTC resistance).Remark: The sensor lines should always beinstalled separately. A parallel installation ofthe sensor and the net pipe within one instal-lation is not allowed and can result in consi-derable malfunctioning of the controls. Toensure fault-free operation and to avoid dama-ging the control system, use only the sensorsincluded in the package. 1 outside sensor, 1storage tank sensor, and 1 boiler sensor areinstalled in the controls as standard equip-ment. If you do not plan to install a hot waterstorage tank, you may request that your boilerbe delivered without the storage tank sensor.Procedure: Turn off the main switch of theboiler and unplug the storage tank sensor.Open the service lid and press the blue buttonwhile turning on the main switch. Hold downthe blue button for approximately 4seconds until SET appears on the display.The current sensor configuration is now set(for detailed information see the chapter “TheControl System”).

fig. 1.11: mass of flue gas flow / burner performance for A1 BG 25i fig. 1.12: mass of flue gas flow / burner performance for A1 BG 40i

with reference to λ = 1,2 (corresponding to CO2 = 9.8 %) with reference to λ = 1,2 (corresponding to CO2 = 9.8 %)

A1 BG 40iA1 BG 25i

mass of flue gas flow/E natural gas burner output

burner output in KWburner output in KW

mass of flue gas flow/E natural gas burner outputm

ass

of fl

ue g

as fl

ow in

kg/

s

mas

s of

flue

gas

flow

in k

g/s

Type of Gas Supply Pressure in mbar*min max

E natural gas 17.0 25.0LL natural gas 17.0 25.0

Connecting the Gas Pipe

The gas connections must be made in compli-ance with the technical guidelines for gasinstallation on worksheet G 600 of TRGI 86,1996 edition. The gas pipe is connected to the safety control block (1/2 “ female) on theunit (comp. pos. 7 in fig. 1.1 and pos. 7 infig. 1.1). We strongly recommend using theDVGW approved connection hose shipped withthe unit.

*If the gas connection pressure lies outside ofthe range indicated, you are advised to contactyour gas supply firm.

[ 11 ]

The Pumps

The A1 boilers are equipped with an integra-ted circulation pump and a 3-way reversingvalve. The pump and the 3-way diverter valveare connected to the Wieland plug strip (fig. 1.13).pump connection: 3 poled red3-way diverter valve connection: 3 poledblue

fig. 1.13: plug strip

Electrical Installation

The ROTEX A1 BG 25i and A1 BG 40i are desi-gned to be used with 240 Volt 50 Hz alterna-ting voltage. Before connecting the boiler,make sure that the supply voltage corre-sponds to the main voltage stated above. In order to avoid confusion between the powersupply and sensor connections, they differ incolour and shape (fig. 1.14). The electricalinstallation of the boiler is completed in thefactory. Changes to the electrical instal-lation are dangerous and should not be per-formed under any conditions. The connectionto the main supply may only be performed byauthorised specialists working in compliancewith VDI regulations DIN 57 116 and theregulations of your energy provider.

A DVGW approved heat-triggered stoppingdevice (TAE) is built into the unit at the factory.The TAE must be built in compliance with theregulations in DVGW-VP 301.

The standard gas connection pipe can cause adecrease of pressure of up to 3.2 mbar. Thisdoes not have a negative affect on the functio-ning of the unit.

fig. 1.14: plug strip connections

12V Plug Strip 220V Plug Strip

mixer circuit sensor(brown)

storage tank sensor(green)

outdoor sensor (red)

radio-controlled clock(blue)

room station (black)

230 V/50 Hz powersupply (black)

storage tank(green)

heating circuit(red)

mixer circuitpump (white)

mixer (green)

diverter valve(blue)

conn

ectio

n gr

oup

[ 12 ]

Initial Operation

After the connection work has been comple-ted, the A1 is ready for operation and may beput into operation by trained personnel. Beforeputting the boiler into operation for the firsttime, you should check the checklist at the end of the chapter “Set-up and Installation”carefully. When all questions on this checklistcan be answered with “yes”, the pre-adjustedburner may be put into operation temporarily.The switch “mode of operation” on the controlpanel must be set to “manual” (pos. 1, fig.1.15). Now the unit may be put into operationby turning on the main switch. The boiler temperature regulator (pos. 2, fig. 1.15)should be in the central position (verticalupwards) for the test.

Testing the Safety Temperature Limiter (STL)

To test the STL, switch the operation modeselection switch to stand-by and hold downthe TÜV button until the STL starts and theburner stops (fig. 1.16; be careful, as theboiler chassis becomes extremely hot).After a successful test, the STL must beunlocked manually after the boiler cools down(fig. 1.17).

fig.1.16: testing the STL

fig.1.17: re-setting the STL

to unlock:1. remove protecting cap2. press red button

STL 110°Ctype ego no.: 55.125 25.540waste gas STL 120°Ctype ego no.: 55.125 25.540

fig. 1.15: manual operation

mode of operation switch;“manual” position

pos. 2 in fig. I2.1

hold down TÜV buttonuntil STL startspos. 13 in fig. 2.1

STL; pos. 11 in fig. 2.1

flue gas STL; pos. 12 in fig. 2.1


boiler temperature regulator

pos. 7 in fig. 2.1

automatic

automatic

Only when all these questions can beanswered with “yes” may the unit be putinto operation.

List of the Norms and Guidelines to be Observed

instructions and regulations for gas com-bustion:DIN 1298, 3388, 3440, 4702, 4705, 4753, DIN-EN 303; DIN-EN 50165.

technical regulations::TRGI ’89, worksheet G 600, 1996 edition;G260-I.

VDE codes:VDE 0100, 016.

Checklist

1. Is the proper flow of the combustion air ensured? yes no

2. Is the room properly ventilated? yes no

3. Do the electrical connections meet regulations? yes no

4. Is the main voltage 230 Volt 50 Hz? yes no

5. Is the flue gas pipe fitted correctly? yes no

6. Is the system water pressure between 1.5 and 2.0 bar? yes no

7. Are the boiler and the heating system vented? yes noFor ventilation purposes and before putting the unit into operation, all control valves should be opened completely!

8. Are the heating circuit pump and the diverter valve connected? yes no

9. Are all sensors connected and positioned correctly? (outdoor temperature sensor, storage temperature sensor yes no

10. Are the sensors of the temperature limiter and the safety temperature limiter fitted correctly in the sensor pockets? yes no

11. Has the gas connection been performed correctly by a specialist? (flow and return; air tightness) yes no

12. Has the gas pipe been properly deaerated? yes no

[ 13 ]

[ 14 ]

C h a p t e r 2 : T h e B o i l e r C o n t r o l P a n e l

Summary

All important service elements and technicalsafety features of the boiler are integrated inthe boiler control panel. The electronics insuretrouble-free operation of the unit. All displaysand controls are marked with position numbersand are described in the following.

1 Main Switch ON/OFF SwitchAll components of the heating system can beturned on or off with the main switch. Whenthe heating system is running, the main switchis lit with a green light. When the heatingsystem is running properly, all other controllights remain off.

2 Operation Mode Selection SwitchYou can choose between the following modesof operation:

Stand-by: (for long absences) All heatingsystems are turned off. However, anti-frost and pump protection (see electricalcontrol system) remain operational.

Night Set Back Operation

Weekday Programmes (pre-adjusted timeprogrammes and the setting of individualtime programmes; see “The ElectricalControl System”)

Continual Daytime Operation

Generation of Domestic Hot Water (without heating operation)

Manual Operation (for specialists or incase of defects in the electrical controlsystem)

Use: For normal operation, the operation selection switch should be set to the symbol

, , or .

3 Day Temperature Selection SwitchAllows you to choose the set temperature for"normal operation".Adjustment: According to individual choicesto temperature.

4 Night Setback Temperature SelectionSwitchAllows you to choose the set temperature forlow operation (night lowering).Adjustment: According to individual sensiti-vity to temperature.

5 Burner Fault DisplayDuring normal operation the light remains off.The light indicates that there is a fault in theboiler (unsuccessful burner start).How to react to a burner fault: You canrestart the burner by pressing the interferenceoverride button on the burner. If burner faultsoccur repeatedly, the interference should berepaired (also see chapter 4 “The Gas Bur-ner”).

6 Safety Temperature Limiter DisplayThe display indicates that the unit has beenlocked in the off position when the boilerbecomes overheated due to a defect.How to react to an STL shut-off: The STLdisplay indicates that a serious failure hasoccurred in the heating system (e.g. obstruc-tion, air in the system, or a pump defect).

7 Selection Switch – Boiler TemperatureThe boiler temperature selection switch servesonly to heat the system manually and for tem-porary manual adjustment of the boiler tempe-rature (e.g. on the occasion of a malfunctioningof the electronic control system). In these

cases the operation mode selection switchmust be switched to “manual operation”.During normal operation of the heating system,the temperature selection switch shouldalways be set to “automatic”.Remark: The 3-way diverter valve is set toheating circuit.

8 The Display (Standard Display)The standard display indicates the currentwater temperature in the boiler and the ON/OFFState of the burner, the heating circuit pump,and the domestic hot water pump can be samepump. For an explanation of further displayoptions see “The Electrical Control System”.

Chimney Sweep Switch and Control Light(only for the heating expert)For measurement and maintenance purposes(chimney sweeps), all components connec-ted to the heating system (circulation pumpand boiler) can be put into operation for ashort period of time without the necessity ofchanging the adjustments on the control panel.The control light lights up to indicate thismode of operation. During normal operationthe light remains off. The 3-way diverter valveis set to heating circuit.

10 FuseThe fuse for the control panel is located underthe cover (250 V; 6,4 A).

11 Safety Temperature Limiter (red re-setbutton under cover, to be unscrewed)

12 Flue Gas STL

13 TÜV Button (only for heating expert)

14 Short Operating Instructions

15 Burner Unlock Button

fig. 2.1: The Boiler Control Panel

[ 15 ]

Electrical Fuse (fig. 2.2)

If the green light remains off and nothingappears in the display when the heating mainswitch and the main switch are turned on, theelectrical fuse is probably defective.Replacement (only when the heatingmain switch is turned off):The fuse is located in the fuse box (pos. 10 infig. 2.1). It can be removed by pressing it inlightly and turning it counter-clockwise 1/4 of a turn. If the new fuse blows immedia-tely, there is a short in the system which mustbe eliminated by authorised specialists.Type of Fuse: Use only fuses of type 250 V;6.4 AT.

fig. 2.2: changing the fuse

Safety Temperature Limiter – STL (STB)(fig. 2.3)

The STL control light (Pos. 6 in Abb. 2.1)lights up when the boiler is overheated. Theunit is automatically shut off and locked. Asthis protection feature only works when adefect in the heating system occurs, thecause of the overheating must be identi-fied and eliminated before the STL isreset!The STL or the flue gas STL may be unlockedafter the protection cap has been screwed offby pressing the red button. If you must replacethe STL, only use approved STLs of thesame type!STL type: EGO No. 55.12525.540 11O°C /ROTEX order no. 015.00 30 013.STL type: EGO No. 55.125 26.530 12O°C /ROTEX order no. Nr. 015.00 30 030.

fig. 2.3: unlocking the STL

Testing the STLs (fig. 2.4)

Before the customer takes over responsibilityfor the heating system, the STL shut-downmust be tested. In order to do this, turn theoperation mode selection switch (pos. 1 infig. 2.1) to “stand-by” and hold down the TÜVbutton (pos. 13 in fig. 2.2) until the STL starts.Warning: The chassis of the boiler beco-mes extremely hot!

Abb. 2.4: testing the STL

Manual Adjustment of Boiler Temperature (fig. 2.5)

(e.g. to heat up at the construction site) Setthe operation mode selection switch (pos. 2 infig. 2.1) to “manual operation”. Set the desi-red boiler temperature on the temperature sel-ection switch (pos. 7 in fig. 2.1). Control theboiler temperature on the LCD display (pos. 8in fig. 2.1). Range of adjustment: 35 – 85°C.Max. temperature in "auto" position.

fig. 2.5: manual operation

to reset:1. remove protecting cap2. press red button

➀ STL 110°Ctype ego no.: 55.125 25.540

➁ waste gas STL 120°Ctype ego no.: 55.125 26.530

250 V; 6.4 AT fuse

to open: 1/4 of a turncounter-clockwise

pos. 10 in fig. 2.1

STL; pos. 11 in fig. 2.1

flue gas STB

mode of operation switch;“stand-by” position

pos. 2 in fig. 2.1

hold down TÜV buttonuntil the STL startspos. 13 in fig. 2.1


choosing the boiler temperature

pos. 2 in fig. 2.1

pos. 7 in fig. 2.1

temperature control onthe standard display

pos. 8 infig. 2.1

automatic

automatic

[ 16 ]

Replacing the Boiler Control Panel (fig. 2.6)

(only when the heating main switch is inthe off position)

To replace the boiler control panel, the com-pact plug on the burner should be pulled outand the sensors should be pulled out of thesensor pockets. The plug strip on the side ofthe boiler wall can simply be unhooked afterall plug connections have been unplugged (thepositions of each of the components areshown graphically in fig. 2.8 at the end of thechapter). The casing of the control panel canbe removed after the four fastening screwshave been removed (fig. 2.6).

Replacing the Control System (fig. 2.7)

The two fastening screws on the controlsystem can be removed with a 1/4 of a turnanti-clockwise. Now the electrical controlsystem can be pulled forward. Bend the fittingclips of the plug connections outward with twosmall electric screwdrivers to pull out theplugs.

fig. 2.6: replacing the boiler control panel

fig. 2.7: replacing the control system

front view

loosen screws – 1/4 of aturn counter-clockwise

loosen plugsrear view

remove plugs X1, X2, and X3

[ 17 ]

fig. 2.8: wiring diagram

mixer circuit sensor(brown)

storage tank sensor(green)

outdoor sensor (red)

radio-controlled clock(blue)

room pos. (black)

230 V/50 Hz powersupply (black)

storage tank(green)

heating cir-cuit (red)

mixer circuitpump (white)

mixer (green)

diverter valve(blue)

conn

ectio

n gr

oup

[ 18 ]

The following modes of operation may be cho-sen from:

Stand-by: all heating systems are turned off; anti-frost and pump protection remain operationalUsed For: leaving the unit off when the building is fully protectedContinual Night Set Back Operation: continual low level heating operation and simultaneous processing of domestic water; The production of hot water occurs during the operation times fixed by time programme 2.Used For: e.g., when you are away for extended periods of time in winterWarning: When there is a danger of frost, the boiler should either be set to stand-by or drained of water.

Continual Daytime Operation:The space heating flow temperature is maintained by the room sensor (pos. 2). The processing of domestic water occurs during the operation times fixed by time programme 2.Used For: Stopping Night Set Back Operation for unplanned use of premises

Production of Domestic Hot Water (without heating operation)The heating operation is turned off when domestic water is processed. The proces-sing of hot water occurs during the opera-tion times fixed by time programme 2.Used For: the processing of water when the heating operation is turned off.

Manual Operation: (for specialists or when there is a fault in the electrical control system)Used For: During normal operation the operation mode selection switch should be set to the symbol or .

Time Programmes:Any of the three day programmes may be chosen with the operation mode selection switch (pos. 1). The programmes set at the factory are shown below. If necessary,you may also set individual time pro-grammes.

C h a p t e r 3 : T h e C o n t r o l S y s t e m

fig. 3.1: operation elements of the control system

Summary

The boiler is equipped with a weather com-pensated control system. The flow tempera-ture is regulated according to the outdoor temperature. A hot water control is integratedin the boiler. The control system includes aswitch clock with a “weekday programme”.Three time programmes programmed at thefactory may be chosen from. Individual timeprogrammes may also be added if needed. Allbasic functions are controlled by microproces-sors. All basic algorhythms and control para-meters have already been set optimally at thefactory. The operator of the unit can adjust thebasic settings to his or her needs.

Power Reserve for Data Security

All programmed parameters and set values aswell as the current date (time, switch-offtimes, day of the week, year) are saved by theintegrated power reserve, even after extendeddisuse or a power failure. selection switch (pos. 1)Mode of Operation

selection switch (pos. 2)Set Temperature for Normal Operation

Used to choose the set temperature for “normal operation”. The set temperature maybe between 14 – 26 °C.mid-range corresponds to 20 °C.

Function: parallel shifting of the heating curveAdjustment: according to individual sensitivityto temperature

WorkplaceHeating Day Heating Operation RemarkCircuit from/tillburner circuit Mo – Fr 05:00 – 18:00 o’clock

16:00 – 22:00 o’clockSa and Su 07:00 – 23:00 o’clock

hot water circuit Mo – Fr 04:30 – 08:00 o’clock

15:30 – 22:00 o’clockSa and Su 06:30 – 23:00 o’clock

mixer circuit Mo – Fr 04:00 – 08:00 o’clock only if 15:00 – 22:00 o’clock installed

Sa and Su 07:00 – 23:00 o’clock mixerFamily

Heating Day Heating Operation RemarkCircuit from/tillburner circuit Mo – Fr 05:00 – 22:00 o’clock

Sa and Su 07:00 – 23:00 o’clockhot water circuit Mo – Fr 04:30 – 22:00 o’clock

Sa and Su 06:30 – 23:00 o’clockmixer circuit Mo – Fr 04:00 – 22:00 o’clock only if

Sa and Su 06:00 – 23:00 o’clock installedmixer

SolarHeating Day Heating Operation RemarkCircuit from/tillburner circuit Mo – Fr 05:00 – 22:00 o’clock

Sa and Su 07:00 – 23:00 o’clockhot water circuit Mo – Su 04:30 – 06:00 o’clock

04:00 – 22:00 o’clockmixer circuit Mo – Fr 04:00 – 22:00 o’clock only if

Sa and Su 06:00 – 23:00 o’clock installedmixer

- without built-in room regulator

set room temperature

- with built-in room regulator

actual room temperature

Displaying the Time

When the yellow button (pos. 5) is pressedbriefly, the current time is displayed.

You can return to the standard display by pres-sing the blue button or by waiting 30 seconds.

Display of Faults

The control system faults short-circuits andfailures of the sensors and indicates thesefaults. The faults is always displayed next tothe symbol of the corresponding heating circuit. A (flashing) in the display indicatesa short-circuit of the corresponding sensor anda (flashing) in the display indicates a failureof the corresponding sensor. The followingfaults messages are possible:

In all these cases an emergency mode willkeep the unit running.

selection switch (pos. 3) Set Temperature for Night Set Back Operation

Used to choose the set temperature for lowoperation (night lowering). The set tempera-ture may be between 8 - 20 °C.mid-range corresponds to 14 °C.Function: Parallel shifting of the heatingcurve.Adjustment: According to individual choice of temperature.

The Display (standard display) (pos. 4)

The current water temperature in the boilerand the requirements of the boiler, the circula-tion pump, and hot water loading are shownon the standard display. The boiler tempera-ture is not displayed if a short or an interrup-tion of the boiler sensor or the domestic watersensor has occurred.(Example: boiler on, heating circuit pump on,storage tank loading pump on, current boilertemperature 40 °C.)

The following symbols are displayed duringfault-free operation:

Displaying the Storage Tank Temperature

When the blue button (pos. 6) is pressedbriefly, the storage tank temperature is dis-played as well as the domestic water symbol(example: storage tank temperature 50 °C).

You can return to the standard display by pressing the yellow button (pos. 5) or by waiting 30 seconds.

Displaying the Mixer Circuit Flow Temperature

(only when the mixer circuit is installed) When the blue button (pos. 6) is pressed twicebriefly when the mixer circuit is activated, themixer circuit flow temperature and the mixersymbol are displayed.(example: mixer circuit flow temperature 25°C)


Displaying the Outdoor Temperature

When the blue button (pos. 6) is pressedtwice briefly (or three times if the mixer cir-cuit is activated), the outdoor temperature andthe symbol are displayed.(example: outdoor temperature –2°C).


Displaying the Room Temperature

When the blue button is pressed 3 timesbriefly (or four times if the mixer circuit isactivated), appears.

Sensor Interruption Short-circuitstorage tank

boiler

outdoor

mixer

[ 19 ]

On (open) Off (closed)

burner

heating circuit pumpstorage tank

loading pump

mixer

[ 20 ]

The Parameters of the Control System

The steepness of the heating curve must beadjusted to match the existing heating instal-lation by a specialist. No further parametersneed be adjusted in most cases.

Displaying and Adjusting the Parameters

There are three setting levels:1. parameters for heating specialists

(to display: hold the blue and yellow buttons down for about 5 sec.)

2. time (to display: hold down the yellow button for about 5 sec.)

3. on/off times (to display: hold down the bluebutton for about 5 sec.)

What all adjustments have in common is thatthey may all be selected with the yellow but-ton (pos. 5 in fig. 3.1) and adjusted with theblue button (pos. 6 in fig. 2.1). Every subse-quent time the blue button is pressed, thevalue of the selected parameter is raised.When the maximum value is reached, theparameter automatically returns to the mini-mum value. After you have finished program-ming, the standard display appears automati-cally and the newly programmed data arestored:

1. if you press the yellow button after the last parameter.

2. automatically 30 seconds after you press a button.

Parameters for Heating Specialists

To enter the heating specialist mode, bothbuttons (yellow and blue) must be helddown for about 5 seconds. The heating spe-cialist mode includes 14 pre-programmedparameters as well as a reset, an operatinghour counter, a burner start counter, and a hotwater mode. Every A1 BG inline oil burner isequipped for the installation of a mixer for anadditional mixer circuit. You can activate it byconnecting and activating the mixer sensor(see the chapter “Temperature Sensors”).

Factory SettingsSteepness of the Heating Curve

Parameter 1range of adjustment: 0.2 – 3.5; factory setting: 1.5The heating curve describes the functionaldependency of the flow temperature on theoutdoor temperature. Since the ROTEX A1 canbe operated without a mixer with a variableboiler temperature which may reach as low asroom temperature, the boiler temperature cor-responds to the flow temperature. The heatingcurve must be adjusted to the existing heatingsystem. Select the heating curve in such a waythat the temperature of the boiler correspondsto the set temperature of the heating systemwhen the outdoor temperature is a minimum.To set the correct heating curve you need onlyenter the steepness of the heating curve. Theheating curve may be taken from the diagramfig. 3.2.

for a rough estimation:floor heating: steepness of the heating curve = 0.7 – 1.0;radiator and system 70 (floor heating):steepness of the heating curve = 1.4 – 1.6; ifyou have temperature control in individualrooms, it is recommended to set the heatingcurve 0.2 higher.

Steepness of the Heating Curve for a Mixer Circuit

Parameter 2 (not active if the mixer cir-cuit is not activated!) range of adjustment: 0.20 – 3.50;factory setting: 0.70

Remark: Because of the inertia of the heatingsystem, there is a long interval before theeffects of a change in the steepness of theheating curve can be detected. When adju-sting the heating curve, you should thus pro-ceed only in very small steps (0.1 per day).During the adjustment period, the room controland the thermostat valves should be almostcompletely opened and all other sources ofheat should be shut off. It is advisable to carryout the adjustment in operation mode . Inthis way, the adjustment period will not bedisturbed by intervals of low operation.

fig. 3.2: diagram of heating curves

boile

r tem

pera

ture

in ∞

C

outdoor temperature in ∞C

heating curve

steepness of heating curve

Hot Water Set Value

Parameter 3range of adjustment: 20 – 60 °C; factory setting: 50 °CThe hot water set value indicates the highesttemperature at which the boiler may refill thehot water tank at the pre-programmed times(switch to storage tank filling). The fillingbegins at a storage tank temperature of 5 Kunder the hot water set value chosen. The 3-way mixing valve switches back for 3 minu-tes in order to use the remaining heat of theboiler.

Legionella Protection

Parameter 4range of adjustment: 1 - 7, factory setting: OFFThe legionella protection turns on one time aweek on the programmed day (1-7) between21:00 and 02:00 o’clock unless it is set to OFF.If the temperature of the storage tank is below60°C at this time, it is heated up to 65°C.

Reduced Operation

Parameter 5range of adjustment: low; eco factory setting: night set backDuring reduced operation you can choose between low operation and eco operation.

a. Night Set Back OperationThe heating circuit pump remains in operationduring the pre-programmed low operationinterval. The flow temperature is adjusted tocorrespond to the pre-programmed low tempe-rature (pos. 3 in fig. 3.1).Used for: a building with a high level of heatloss

b. ECO OperationDuring pre-programmed night set back opera-tion intervals the heating system (pump andburner) are turned off as long as the outdoortemperature remains above the anti-frost limitof 3°C. If the outdoor temperature sinks belowthe anti-frost limit, the unit switches to lowoperation automatically. The heating circuitpump shuts off for three minutes in order toavoid an overheating of the boiler and to makeuse of the remaining heat. The anti-frost pro-tection remains operational during eco opera-tion.Used for: a building with a low level of heatloss

Summer Shut-off

Parameter 6range of adjustment: 10 – 30 °C;factory setting: 22 °CThe summer shut-off shuts off the entire hea-ting operation during summer operation. Thehot water processor remains operationalaccording to the time programme. The summershut-off operates according to two separatecriteria:

a. Quick Shut-off (in the case of a rapidrise in temperature): The summer shut-offactivates if the actual outdoor temperaturerises 2 K above the set value.

b. Average Temperature Shut-off (in thecase of a slow rise in temperature): Thesummer shut-off activates if the actual andaverage outdoor temperature reach the setvalue. The shut-off (a. and b.) is cancelledwhen the actual and average temperature fall1 K below the set value.

Maximum Boiler Temperature

Parameter 7range of adjustment: 70 – 85 °C, factory setting: 70 °CIn keeping with heating system regulations,the control system is equipped with a electro-nically controlled maximum boiler temperaturelimiter. The boiler shuts off when the maxi-mum temperature is reached. The burner startsagain when the boiler temperature falls 7.5 Kbelow the maximum temperature.

Mixer – Minimum Temperature

Parameter 8 (not functional if the mixercircuit is not activated !)range of adjustment: 10 – 85°C,factory setting: 20°CThe set temperature is the minimum tempera-ture of the mixer circuit, below which it willnot sink.

Mixer – Maximum Temperature

Parameter 9 (not functional if the mixercircuit is not activated !)range of adjustment: 10 – 85°C, factory setting: 70°CThe set temperature is the maximum tempera-ture of the mixer circuit, above which it willnot rise.

Summer-Winter-Time Switch

Parameter 10range of adjustment: ON, OFFfactory setting - ONThe automatic switch to and from Winter-Sum-mer-Winter.

Minimum Burner Running Time

Parameter 11range of adjustment: 1 - 10 min, factory setting: 1 minA minimum burner running time may be set tolengthen the duration of burner running times.When the boiler reaches the maximum tempe-rature, the burner is shut off prematurely.

[ 21 ]

Minimum Modulation Output

Parameter 12range of adjustment: 20-50%,factory setting: 30%The minimum output of the range of modula-tion can be entered in % of rated output.(example: 20% corresponds to 5kW).

Maximum Modulation Output

Parameter 13range of adjustment: 50-100%factory setting: 100%The maximum output of the range of modula-tion can be entered in % of rated output.(example: 100% corresponds to 25kW)

Reset

Parameter 14range of adjustment: CL, SETfactory setting: CLWhen the blue button is held down for about 5seconds, all changeable parameters on thismode are set back to the factory setting. Thefollowing appears on the display:

Operation Hour Counter

Parameter 15starting value 0000 h, range 0000 - 19999 hThis parameter counts the hours the boiler hasbeen in operation. You can set the operationhour counter back to 0000 by holding down theblue button for about 5 seconds. It is advisableto reset the counter after every maintenancecheck.

Burner Start Counter

Parameter 16starting value 0000, range 0000 - 19999This parameter counts the amount of burnerstarts. When the blue button is held down forabout 5 seconds, the burner start counter isset back to 0000. It is advisable to reset thecounter after every maintenance check.

Type of Operation

Parameter 17range of adjustment: 3U / LP, factory setting: 3UThis parameter indicates the type of operationfor the domestic water installation. When setto LP, the storage tank loading is overtaken byan extra storage tank load pump. The setting3U (factory setting) effects a switch betweenheating operation and storage loading by wayof a 3 way diverter valve.

Leaving the Heating Specialist Mode

To leave the heating specialist mode, press theyellow button again briefly after parameter 11 or wait 30 seconds.

Activating and Deactivating Sensors(SET-Function)

The control system is set at the factory toactivate the connection of one outside sensorand one storage tank sensor. If you wish to usemore or less sensors (e.g. for operation with-out a storage tank sensor or with a mixercircuit), the desired changes must be re-

gistered in the control system. The procedureis as follows:1. turn off the boiler main switch2. connect the desired sensor

configuration to the plug strip3. hold down the blue button4. turn on the control system5. hold down the blue button until SET

appears on the display

The connected sensors are now activated. Allsensors not connected at this time are deac-tivated.

[ 22 ]

[ 23 ]

The following flow chart shows thesequence of parameter adjustments onthe heating specialist mode.(factory settings):

fig. 3.3: flow chart of parameter adjustments

Enter yellowbutton

bluebutton

Max. temperature mixerparameter 9

Auto summer-winter timeparameter 10

At least burner running time

parameter 11

Minimum modulating efficiency

parameter 12

Maximum modulatingefficiency

parameter 13

HF resetparameter 14

Operating hours parameter 15

Burner startsparameter 16

WW-Modeparameter 17

Return to standard displays

Chan

ge to

nex

t par

amet

er

hold down both simultaneously for approx. 5 seconds

bluebutton

yellowbutton

bluebutton

yellowbutton

Adjust parameter

Adjustment range: 0,20 - 3,50Underfloor heating: 0,70 - 1,00Radiator: 1,40 - 1,50

Adjustment range: 0,20 - 3,50Underfloor heating: 0,70 - 1,00Radiator: 1,40 - 1,50

Adjustment range: 20 - 65 °C

Adjustment range: 1 - 7, OFFNumber corresponds day

Adjustment range: Abs, EcoEco corresponds complete switching OFFAbs corresponds lowerator temperature





Adjustment range: ON, OFF

Adjustment range: 1 - 10 min

Adjustment range: 20 - 100%

Adjustment range: min. modulation efficiency

Indication range: CI, setBlue button approx 5 sec.Parameter to base value

Indication range: 0000 - 19999 hBlue button 5 sec.= ceros

Indication range: 0000 - 19999 hBlue button 5 sec.= ceros

Adjustment range

bluebutton

bluebutton

yellowbutton

yellowbutton

yellowbutton

yellowbutton

bluebutton

bluebutton

bluebutton

bluebutton

bluebutton

yellowbutton

yellowbutton

yellowbutton

yellowbutton

yellowbutton

bluebutton

bluebutton

bluebutton

yellowbutton

yellowbutton

bluebutton

bluebutton

yellowbutton

bluebutton

yellowbutton

bluebutton

yellowbutton

bluebutton

yellowbutton

Not activated without

mixer circuit


mixer circuit


mixer circuit

Steepness characteristic line

parameter 1

Steepness mixerheating circuit

parameter 2

Warm water desi-red valve

parameter 3

legionella protec-tion

parameter 4

Reduced operation

parameter 5

Summer switchoff

parameter 6

Maximum temperatureparameter 7

Minimumtemperature mixer

parameter 8

[ 24 ]

Setting the Time

The time is set at the factory. The powerreserve assures and the automatic daylightsaving time switch assure that the internalclock is set correctly upon initial operation.However, if it is necessary to correct the time,proceed according to the following chart.After the year has been entered, return to thestandard display by pressing the yellow buttonagain or by waiting 30 seconds for the auto-matic return.The weekday ( = Mo; … ; = Su) is calcula-ted automatically after the return to the stan-dard display.

1 7

Chan

ge to

nex

t par

amet

erAdjust parameter

Enter Push approx. 5 secondsyellow button

yellow button

yellow button

yellow button

yellow button

yellow button

bluebutton

bluebutton

bluebutton

bluebutton

bluebutton

Minute

Hour

Day

Month

Year

Return to standard display

Adjustment range:00 - 59





[ 25 ]

Setting Individual Time Programmes

Two switch-on times and two switch-off timesfor each day of the week can be programmedfor the heating circuit as well as for the hotwater circuit. Choose the time programme youwish to change ( , or ) with theoperation mode selection switch. To enter theswitching mode, hold down the blue button forabout 5 seconds. Afterwards, choose the heating circuit you wish to set a switchingtime for with the yellow button (boiler circuit,storage tank circuit, or mixer circuit). Twoswitch-on times and two switch-off times perday can be programmed for the chosen heatingcircuit. To skip a switching time, 00.00 must beentered for the time. Thus, the time 00.00 isnot available as a switching time. The possibleswitching times are between 00.30 o’clock and23.30 o’clock in 30 minute increments. If youmake a mistake while programming, the switching times of the chosen time programcan be set back to the factory setting. In orderto do this, hold down the blue button for about15 seconds after entering the switching mode.“Set” appears briefly in the display.

Choo

sing

of t

he h

eatin

g ci

rcui

t

Warm watercircuit

yellowbutton

yellowbutton

yellowbutton

bluebutton

bluebutton

bluebutton

bluebutton

heating circuit

bluebutton

Enter in programming

Mixer circuit

Standarddisplay

Enter in programmingcontinue see next diagram




Choo

sing

to n

ext s

witc

hing

tim

e

Adjust switching time (30min. steps)

yellowbutton

bluebutton

bluebutton

yellowbutton

bluebutton

yellowbutton

yellowbutton

bluebutton

Monday first switch in time

Monday first switch off time

Monday secondswitch in time

Sunday secondswitch off time


Approx. 2 seconds

Adjustment range: 00:30 - 23:30

Approx. 2 seconds


Approx. 2 seconds


Approx. 2 seconds


Approx. 2 secondsEnter

[ 26 ]

C h a p t e r 4 : T h e G a s B u r n e r

1 burner surface2 230 V blowing engine3 safety gas regulating device4 integrated gas/air regulating device5 electrovalves (1 x class B and 1 x class C)6 gas firing device with ignition

fig. 4.1: the BG 25i gas burner

fig. 4.3: the gas burner

fig. 4.2: the BG 40i gas burner

fig. 4.4: the gas burner – side view

7 gas connection (1/2 “ female)8 Venturi tube with ø50 air connection9 measuring connection “in” gas admission

pressure10 measuring connection “out” gas pressure

according to gas regulator11 fitting screw for gas/air mix

12 burner flange13 ionisation electrode14 ignition electrode15 gas baffle plate16 burner flange seal17 blowing engine flange seal18 blowing engine flange

Summary

The gas surface burner of the ROTEX A1 BGInline modulates between 5-25 kW (A1 BG 25i)or 8-40 kW (A1 BG 40i). It runs quietly, is resi-stant to wear, and emits only an extremely lowamount of pollutants. The burner is construc-ted in a modular manner. It consists of the fol-lowing components:- burner surface (pos. 1 in fig. I4.1)- unaflow blowing engine without collectors (pos. 2 in fig. 4.1)

- Venturi mixing tube (pos. 8 in fig. 4.1)- safety gas regulating device (pos. 3 in fig. 4.3) with integrated gas filter and electro-valves

- firing device with integrated ignition (pos. 6 in fig. 4.1)

- burner flange (pos. 12 in fig. 4.1)- electrode group with ignition electrodes and ionisation electrodes (pos. 13/14 in fig. 4.3)

Resetting the Burner

A fault shutdown of the burner is indicated bythe control light on the boiler control panel(pos. 5 in fig. 2.1).You can unlock the burner by pressing the faultoverride button on the control panel briefly(pos. 14 in fig. 2.1).

Burner Output

The computer control system integrated intothe control panel uses operating data from theboiler (sensor temperatures, set operatingparameters, and set values) to calculate thenecessary burner output level. The controlsystem converts this information into a signalthe burner blowing engine can understand andthen passes it on to the engine.The burner blowing engine reacts by adjustingthe speed of the blower and thus of the flowof combustion air. The gas regulating deviceregulates the amount of gas accordingly, thusassuring a constant amount of excess air (airvariable I) in the entire unit (see the descrip-tion of the integrated gas/air controllingdevice).

Limiting the Maximum Burner Output

The maximum burner output can be limitedfrom the control panel by way of a simpleparameter adjustment (see parameter 10 ofthe heating specialist mode, p. 16). This canbecome necessary if, for example, you need tolimit the flue gas temperature.The integrated flue gas STL limits the maxi-mum flue gas temperature of the ROTEX A1BG Inline to 120 °C. If you affect this value bysetting a limit in parameter 10 of the heatingspecialist mode, the modified maximum fluegas temperature may be found on tables 4.5 and 4.6.

Limiting the Minimum Burner Output

The minimum burner output can be limitedfrom the control panel by way of a simpleparameter adjustment (see parameter 9 of theheating specialist mode, p. 16).

Integrated Gas/Air Regulating Device

The integrated gas/air regulating device of theROTEX A1 BG Inline consists of a Venturi tubewith a ring-shaped gas intake and a gas pres-sure regulator.The gas/air regulating device serves to makesure that air variable I, the value set at the airfitting screw (pos. 11 in fig. 4.2), is held at aconstant value regardless of burner output.The control system compensates for fluctuati-ons in gas pressure of 5-55 mbar (zero pres-sure regulator). Depending on the flow volumeof the combustion air, a corresponding ventila-ting pressure is created in the centre of theVenturi tube (pos. 8 in fig. 4.3). In this waythe gas, which is not pressurized due to thegas/air regulating device (zero pressure regu-lator) (pos. 4 in fig. 4.3), is sucked into thecentre of the Venturi tube and brought to theburner surface and mixed optimally by the bur-ner blowing engine (pos. 2 in fig. 4.1).This combination causes the burner to reactimmediately to any change in air flow volumeby changing the flow volume of the gas.

Adjusting the Burner and Type of Gas

The burner is adjusted at the factory for usewith the type of gas supplied by your energyprovider (see adjustment sticker). After a successful trial run of the unit, the burner mustbe adjusted to approx. 9.8 % CO2. This shouldbe done in chimney sweep operation modewith the help of a waste gas measuringdevice. With the burner running and the boilerwarmed up, use the gas fitting screw (pos. 11in fig. 4.3) to adjust the amount of excess air.counter-clockwise: more gas (fatter)clockwise: less gas (leaner)(Follow the same procedure when switching toLL natural gas.)

[ 27 ]

[ 28 ]

Adjusting the Ignition and Ionisation Electrodes

The electrodes are adjusted optimally at thefactory. If they get bent out of shape, readjustthem according to fig. 4.7.

fig. 4.5: table for the A1 BG 25ivalue set in range of range of maximum maximum flue Maximale mass of flue parameter 13 (heating rated output firing output stress on boiler* gas temperature Abgastemperatur gas flow specialist mode) in kW in kW in kW (40/30)°C (80/60)°C in kg/s

50 5 - 12,5 4.6 - 12.8 12.8 54 81 0.002 - 0.00660 5 - 15 4.6 - 15.3 15.3 59 86 0.002 - 0.00770 5 - 17,5 4.6 - 17.9 17.9 65 91 0.002 - 0.00880 5 - 20 4.6 - 20.4 20.4 72 97 0.002 - 0.00990 5 - 22,5 4.6 - 23 23 79 104 0.002 - 0.010

100 5 - 25 4.6 - 25.5 25.5 87 111 0.002 - 0.011

fig. 4.6: table for the A1 BG 40ivalue set in range of range of maximum maximum flue Maximale mass of flue parameter 13 (heating rated output firing output stress on boiler* gas temperature Abgastemperatur gas flow specialist mode) in kW in kW in kW (40/30)°C (80/60)°C in kg/s

50 8 - 20 7.3 - 20.4 20.4 45 68 0.003 - 0.00960 8 - 24 7.3 - 24.5 24.5 52 74 0.003 - 0.01170 8 - 28 7.3 - 28.6 28.6 61 81 0.003 - 0.01280 8 - 32 7.3 - 32.7 32.7 71 90 0.003 - 0.01490 8 - 36 7.3 - 36.7 36.7 83 100 0.003 - 0.016

100 8 - 40 7.3 - 40.8 40.8 96 111 0.003 - 0.018* the actual burner output may be lower depending on the impedance of the air and flue gas lines**at heating circuit temperatures of 80/60°C (40/30°C)

fig. 4.7: adjusting the ignition and ionisation electrodes

view from underneath

ionisation electrode

ignition electrode

[ 29 ]

manual operation of the heating circuit and thehot water tank, the mixing valve can be stop-ped in mid-position with the hand lever (pos.2.3 in fig. 5.1) after disconnection from thepower source.

1 Vakuummeter-anschluss2 Öldruck-Regulierungs-Schraube3 Schrauben-pumpendeckel4 Pumpendeckel5 Manometer-anschluss6 Vorlaufanschluss7 Rücklaufanschluss

C h a p t e r 5 : I n t e g r a t e d C o n n e c t i o n G r o u p

The integrated connection group is a compact,plug-ready unit used to connect a heating cir-cuit and a hot water tank to the ROTEX A1.

Functioning

The circulation pump (pos. 1 in fig. 5.1) requi-res the necessary flow of water through theheating boiler and the active circuit (hot watertank or heating circuit). The mixing valve (pos.2 in fig. 5.1) is switched between heating cir-cuit and hot water tank according to need bythe boiler control system.

Electrical Installation

The connection group is wired and ready forconnection. The connection plug is configuredto fit into the connection strip of the ROTEXA1. The plugs are colour and form coded toensure the correct connection.

fig. 5.2: electrical installation

Remark: For emergency operation or in thecase of a defective mixing valve, you canremove the motor head (pos. 2.1 in fig. 5.1)after unlocking by applying pressure to thelock (pos. 2.2 in fig. 5.1) and turning it coun-ter-clockwise 1/4 of a turn. The mixing valve isthen in the heating operation position. For atemporary parallel

Technical DataA1 BG 25i A1 BG 40i

Pump Grundfos WILOUPS 15-60 ES RS 25/7-3

voltage 230 V 50 Hz 230 V 50 Hz

max. output 90 W 132 W

capacity 2,5 µF 3,5 µF

protective system IP 44 IP 42

excess

pressure allowed 3 bar 3 bar

max. lift 6 m 7 m

3 Way Valvevoltage 230 V 50 Hz

max. output 4,3 W

protective system IP 40

switching time 6 sec.

fig. 5.1: integrated connection group

Bheating returnR 1” female

heating flow R 1” femaleROTEX A1 BO 20i

storage tank return R 1” male

storage tank flow R 1” male

ROTEX A1 BO 35i

Bheating returnR 1” female heating flow R 1” female

storage tank flow R 1” male

view A

view A

mixing valve

pump red

blue

blue

yellow/ green

brown

brown

black

blue

storage tank return R 1” male

[ 30 ]

fig. 6.3: opening the combustion chamber

fig. 6.4: removing the deflector insert A1 BG 25i

fig. 6.5: removing the deflector insert A1 BG 40i

C h a p t e r 6 : M a i n t e n a n c e a n d C l e a n i n g

Regular maintenance and cleaning of the hea-ter lowers energy consumption and guaranteesthe long life and fault-free operation of theunit. For this reason, heating system regulati-ons require that the unit be serviced by a spe-cialist at least once a year. To assure regularmaintenance, it is advisable to sign a ser-vice contract.

It is sensible to have the unit serviced eitherdirectly before or after the heating period. Thefollowing pages provide information as towhich tasks should be performed. At the endof the chapter there is also a checklist whichcan be used to detect faults and their solutionsin case the boiler ceases to function unexpec-tedly.

Removing the Sound Insulation Cap

Before the unit can be serviced, it is necessaryto remove the sound insulation cap of the bur-ner. The sound insulation cap sits on the bur-ner panelling and is easy to remove (fig. 6.1).

Removing the Boiler Casing

The burner panelling is fastened by four moun-tings, one in each corner. You can remove it bylifting it up.

fig. 6.1: removing the sound insulation cap

Removing the Insulation Mould Parts

The insulation mould parts are fixed to the bur-ner with twelve open mouthed connectingblocks. For maintenance purposes, it is enoughto remove the two upper parts of the mould. Inorder to do this, press the relevant connectingblocks together with their chromium-platedmetal hoops and remove them. After removingthe connecting blocks, you may remove bothupper parts of the mould (fig. 6.2).

fig. 6.2: removing the insulation mould parts

Opening the Combustion Chamber

Warning: only when the burner is shut offand has had time to cool downTo open the combustion chamber, four Allanscrews M8 must be removed (fig. 6.3). Thecombustion chamber can only be opened fromthe top. An air pressure spring supports theopening process and holds the upper half ofthe burner open during maintenance. The half-rounded combustion chamber charge withfire-proof deflector is located in the lower halfof the burner. When cleaning the combustionchamber, the charge should be removed,checked for possible damage, and replaced ifneeded (fig. 6.4).Necessary Tool: Allan key SW 8, combustionchamber key

Troubleshooting

Fault Possible Cause Possible Removal

heating unit not functioning power supply cut turn on boiler main switch

turn on furnace room main switch

check / replace boiler control panel fuse

check / replace house service connection fuse

burner will not start when it no power supply to burner check voltage on the L1.N clamps of the 7 poled plug

check / replace fuse

automatic flame control has shut off check the polarity of the power main

check the position of the ionisation electrode

connections of controlling device are loose check all plugs and make sure they are fully inserted

no gas pressure check the gas connection

air in gas line aerate the gas line

maximum burner capacity too small air / flue gas resistance too large check whether line is dirty

if necessary, use a larger cross section for

the air supply line

Most Important Steps:

- Make sure the fuel lines are sealed and not damaged.

- Clean the burner head.- let the burner run in chimney sweep mode for

about 10 minutes and then analyse the combustion process according to the followingfactors:

1. flue gas temperature in the chimney (<120°C)

2. CO2 content (9.8% ± 0.2%)3. CO content (< 50 ppm)

Checking the Connections

During service, all connections as well as thegas and power connection should be checkedfor damages and repaired if necessary. If faultsoccur in the power supply, an authorised com-pany approved by your energy provider shouldbe contracted with the removal of the fault.

Remark: We recommend recording all meas-ured values and all service and maintenancework, including date and signature, on theincluded maintenance form and leaving it insight of the chimney sweep.

Cleaning the Boiler Casing

The sound insulation cap and the boiler casingconsist of easy to clean synthetic material.Only clean them with soft towels and a mildcleaning solution consisting of water andsoap. Aggressive cleaning solutions with solvents are not recommended. They maydamage the surface of the panelling.

Cleaning the Combustion Chamber and the Burner

Dirt and soot on the fins of the combustionchamber may simply be swept off with theincluded cleaning brush. Fallen dust collects inthe bottom half of the burner where it may beremoved away easily with a vacuum cleaner(fig. 6.6). The burner need not be removed forcleaning purposes.

fig. 6.6: removing dirt

[ 31 ]

[ 32 ]

There are two ROTEX hot water tanks availa-ble to choose from for the ROTEX A1 BG Inlineheating boilers. The first is called Sanicube, alarge hygienic tank made entirely out of syn-thetic material. The other is the US 150, a

space saving tank made of high-grade steelwhich fits under the unit. Indications for instal-ling the tanks in the heating system may befound on fig. 7.1 and fig. 7.2.

1 ROTEX A1 BG Inline heating boiler2 integrated connection group2.1 circulation pump2.2 mixing valve3 hot water tank Sanicube SC 580/1

or US 1503.1 tank container3.2 charging heat exchanger3.3 PE-X pipe heat exchanger

(not included with US 150)4 tank sensor5 cold water connection

(according to DIN 1988)6 hot water tap7 circulation pump8 heating flow9 heating return

10 tank flow11 tank return12 draining spigot13 clack valve14 pressure control valve

This hydraulic diagram is valid only forthe ROTEX A1 BG 25i!

C h a p t e r 7 : H o t W a t e r T a n k( n o t i n c l u d e d )

fig. 7.1: hydraulic diagram for ROTEX A1 BG 25i and ROTEX A1 BG 40i with Sanicube

fig. 7.2: hydraulic diagram, only ROTEX A1 BG 25i with US 150

13

15

1513

[ 33 ]

Sanicube SC 580/1

empty weight 108 kg

total tank capacity 500 l

domestic water capacity 80 l

max. tank water temperature 85 °C

surface of the metal pipe heat exchanger 1,0 m2

surface of the sanitary water heat exchanger 25 m2

content of the metal pipe heat exchanger 5 l

max. pressure allowed in the metal pipe h.e. 20 bar

constant power output according to DIN 4708 Qn 22.4 kW

basic output according to DIN 4708, NL 3.5

max. operating pressure of the sanitary water, pmax. 6 bar

Heat Insulation of the Tank Container

medium spec. power loss 1.4 W/K

Dimensions

L x B x H in cm 78 x 78 x 153

Pipe Connections

cold and hot water R 3/4" female

flow and return heating water R 3/4" male

Materials

inner container polypropylene

outer container polypropylene

charging heat exchanger high-grade steel

piping

domestic water heat exchanger vulcanised

polyethylene

(PE-X)

ø 20 x 2,2 mm

The Sanicube is also available in the version SC 580/2

(2 WT per 1.0 m2 ).

For purely electrical operation, the SC 580/0 (without WT) is available.

US 150

empty weight 44 kg

total tank capacity 150 l

domestic water capacity 150 l

max. tank water temperature 90 °C

surface of the metal pipe heat exchanger 0,6 m2

surface of the sanitary water heat exchanger –

content of the metal pipe heat exchanger 3,2 l

max. pressure allowed in the metal pipe h.e. 20 bar

constant power output according to DIN 4708 Qn 25 kW

basic output according to DIN 4708, NL 2,2

max. operating pressure of the sanitary water, pmax. 10 bar

Heat Insulation of the Tank Container

medium spec. power loss 1,1 W/K

Dimensions

L x B x H in cm 100 x 66 x 66

Pipe Connections

cold and hot water R 3/4" female

flow and return heating water R 3/4" male

circulation R 3/4 " female

Materials

inner container high-grade steel

outer container polypropylene

charging heat exchanger high-grade steel

piping

domestic water heat exchanger –

Technical Data for the Sanicube and US 150

• •

[ 34 ]

C h a p t e r 8 : T e c h n i c a l D a t a

fig. 8.1: switch diagram

fan unit

fan unit control system

AMP

plug

-in

conn

ectio

n

blow

ing

engi

ne

mix

eron

ly w

hen

regu

late

d by

mix

er

flue

gas

STL

boile

rch

assi

s

pink

mol

ex p

lug

gas

firin

g de

vice

Hon

eyw

ell t

ype

S 45

65 B

D 1

049

from

pro

duct

ion

no.:

5003

91 (M

ay 1

999)

blac

k

blue

red

yellow

blue

blue

brow

n

brown

black

blue

black

white

brown

blue

green/Yellow

whitebl

ue

black

OFF

ON

black no.3

black no.1

black no.2

green/ yellow

blue

brown brownblackblack

blac

k blue

blue

red

black

red

blue

blue

brow

nbr

own

red

red

green

blac

k

whi

te

whi

te

brow

n

brow

n

white

brown

sation control. If there is no flame, the firingdevice automatically closes the electrovalvesin the safety gas control block. The duration ofburner starts with normally operating burnersand in the case of a fault-shutdown may betaken from fig. 8.2.

[ 35 ]

Firing Device

(pos. 6 in fig. 4.1 and fig. 4.2)The firing device of the burner regulates theduration of burner ignition and includes theignition transformer as well as the flame ioni

A1 BG Inline Technical Data A1 BG 25i A1 BG 40irated heating output 5-25 kW (may be limited) 8-40 kW (may be limited)rated heat load 5,5 – 26,7 kW 8,5 – 42,5 kWtype of device B23/C63X* B23/C43X/C63X

product ID no. CE-0085 AS 0011 CE-0085 AS 0011NOX-class 5 5electrical data 230 V / 50 Hz 230 V / 50 Hzelec. power consumption max. 45 W max. 45 Wprotective system IP 20 IP 20max. operating pressure 4 bar 4 barmax. operating temperature 80°C 80°Cmax. boiler efficiency 109% 109%flue gas temperature 35-115°C (may be limited) 35-115°C (may be limited)weight of boiler chassis 49 kg 67 kgtotal weight 74 kg 98 kglength 720 mm 720 mmwidth 625 mm 625 mmheight 1100 mm 1340 mmdiameter of flue gas connection 80 mm 80 mmpermissible flue gas back pressure -10 / +200 Pa -10 / +200 Pagas connection 1/2 “ female 1/2 “ female

Gas Connection Pressure:E natural gas 17-25 mbar*LL natural gas 17-25 mbar*

countries of destination: category of device:DE-NL-LU I 2 ELLAT-CH-DK-FI-SEES-GB-GR-IE-IT-PT I 2 H

fig. 8.2: program duration

*If the gas connection pressure is outside ofthe range indicated, your gas supply firmshould be notified.Notice: The pressure drop caused by flue gas and aeration combined may not exceed 200 Pa.

Normal Fault Shut-down Due to Ignition Failure

temperature regulator

burner blowing engine

ignition

gas valve

flame control

fault light

temperature regulator

burner blowing engine

ignition

gas valve

flame control

fault light

008.

15 0

0944

· w

e re

serv

e th

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ht to

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l spe

cific

atio

ns ·

07/2

002

ROTEX GmbH

Postfach 30 · D-74361 Güglingen

telephone +49 (0)7135/103-0 · fax +49 (0)7135/103-200

e-mail [email protected] · www.rotex.de

rotex a1 bg

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