Atmos Coopra User manual

MV030204 manual Atmos EN 35_40 - E000129013 w pump connection
Installation- and User Manual
Central Heating Boiler……………………………..…………..35C
Central Heating Boiler……………………………..…………..40C
Wall hung, fan flue, room sealed gas boilers
E000129013

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CONTENTS
CHAPTER 1. 5
1.1. Technical data 15B; 15C; 30K; 30B; 30C............................................................................................... 5
1.2. Dimensional sketch................................................................................................................................ 6
1.3. Unit components..................................................................................................................................... 7
1.4. Diagrams.................................................................................................................................................. 8
1.4.1 Functional flow diagram........................................................................................................................... 8
1.4.2. Verkabelungsplan................................................................................................................................... 9
1.5. Operation ............................................................................................................................................... 10
1.6. Boiler types............................................................................................................................................ 10
1.6.1. Atmos 30K.............................................................................................................................................. 10
1.6.2. Atmos 15B / 30B..................................................................................................................................... 10
1.6.3. Atmos 15C / 30C ................................................................................................................................. 10
1.6.4. Difference between type 15 and type 30................................................................................................ 10
1.7 Conditions of delivery............................................................................................................................. 11
1.8. Configuration of flue tube and air supply....................……………………….......……………….............. 11
1.9. Environmental conditions....................................................................................................................... 11
1.10. Permitted flue resistance.......................................................................................................................... 11
1.11. Heating of central heating water (all models)......................................................................................... 11
1.12. Pump and hydraulic resistance .............................................................................................................. 12
1.13. HWS....................................................................................................................................................... 12
1.13.1. Heating of hot water (Combi-Boiler) ………………........…………………………………………............... 12
1.13.2. Heating of HWS (boiler with external storage cylinder) ......................................................................... 12
1.14. Standards / Guidelines............................................................................................................................ 12
1.15. General satety regulations..................................................................................................................... 12
1.16. Water quality........................................................................................................................................... 12
CHAPTER 2. INSTALLATION 13
2.1. Mounting the rear cabinet with expansion vessel................................................................................... 13
2.2. Mounting the assembly bracket.............................................................................................................. 13
2.3. Water ans gas connections.................................................................................................................... 14
2.3.1. Gas connection...................................................................................................................................... 14
2.3.2. Central heating water connections.......................................................................................................... 14
2.3.3. HWS connetionto the Combi-boiler....................................................................................................... 14
2.3.4. Hot water connection to boiler with external storage HWS cylinder........................................................ 14
2.4. Seal on the waterside............................................................................................................................. 14
2.5. Draconin connection................................................................................................................................ 14
2.6. Electricity connection............................................................................................................................. 14
CHAPTER 3. SUSPENDING THE UNTI 15
3.1. The unit .................................................................................................................................................. 15
3.2. Suspension............................................................................................................................................ 15
3.3. Fitting the flue tube and air supply......................................................................................................... 15
3.3.1. Connenting the eccentric flue and air supply (2-pipe system)............................................................... 15
3.3.2. Connecting the concentric flue tube and air supply (80/125 mm adapter)............................................. 15
3.3.3. Connecting the concentric flue tube and air supply (60/100 mm adapter)............................................. 15
3.4. Condensation water drain/overpressure protection on drain.................................................................. 15
3.5. Connection block.................................................................................................................................... 15
3.5.1. On/off room thermostat (if applicable). Connect to terminals (1) and (2)............................................... 15
3.5.2. Modulating room thermostat (if applicable) . Connect to terminals (1) and (2)...................................... 15
3.5.3. Connection for the external temperature sensor (if appicable) Connect to terminal (3) ans (4)............. 16
3.5.4. Connection of the temperature sensor for the external HWS cylinder. Connect to terminal (5) and (6) 16
3.6. Assembling the connection block........................................................................................................... 16
3.7. Placing the jacket................................................................................................................................... 16
CHAPTER 4. COMMISIONING 17
4.1. Electrical power....................................................................................................................................... 17
4.2. Main switch............................................................................................................................................. 17
4.3. Filling...................................................................................................................................................... 17
4.4. Reading the water pressure................................................................................................................... 17
4.5. Venting................................................................................................................................................... 17
4.6. Chimney sweeper function..................................................................................................................... 17
4.7. Gas / Air Ratio........................................................................................................................................ 17
4.8. Gas / Air adjustment (CO2analysing)..................................................................................................... 18
4.8.1. Full load.................................................................................................................................................. 18

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4.8.2. Low load.................................................................................................................................................. 18
4.9. Placing the jacket................................................................................................................................... 18
4.10. Changing over to LPG-gas.................................................................................................................... 18
4.10.1. Full load om Propane............................................................................................................................. 18
4.11. Display................................................................................................................................................... 19
4.11.1. Normal operation (permanent status indication).................................................................................... 19
4.11.2. blocking operation (permanent status indication).................................................................................. 20
4.11.3 Lock-out (flashing status indication)....................................................................................................... 20
4.12. Menu structure....................................................................................................................................... 21
CHAPTER 5. TEMPERATURE REGULATIONS 22
5.1. Central Heating........................................................................................................................................... 22
5.1.1. Central heating temperature regulation with on/off thermostat without outside temperature sensor......... 22
5.1.2. Central heating temperature regulation with on/off thermostat with outside temperature sensor.............. 22
5.1.3. Central heating temperature regulation with modulating thermostat with or without outside tempsensor.. 22
5.2. HWS temperature regulations.................................................................................................................... 23
5.2.1. Combi-boiler............................................................................................................................................... 23
5.2.1.1. HWS heat demand..................................................................................................................................... 23
5.2.1.2. End of hot water heat demand................................................................................................................... 23
5.2.1.3. Store heat demand..................................................................................................................................... 23
5.2.1.4. End of store demand.................................................................................................................................. 23
5.2.2. Boiler with external HWS cylinder.............................................................................................................. 23
5.2.2.1. HWS cylinder with external sensor without modulating space unit............................................................ 23
5.2.2.2. HWS cylinder with external sensor with modulating space unit.................................................................. 23
5.2.3. HWS cylinder with thermostat without modulating space unit.................................................................... 23
5.2.4. HWS cylinder with thermostat with modulating space unit......................................................................... 23
CHAPTER 6 BURNER STATES and MONITORING 24
6.1. Burner states.............................................................................................................................................. 24
6.1.1. Rest state................................................................................................................................................... 24
6.1.2 Purging/Prestart......................................................................................................................................... 24
6.1.3. Ignition........................................................................................................................................................ 24
6.1.4. Operation.................................................................................................................................................... 24
6.1.5. Post-ventilation........................................................................................................................................... 24
6.1.6. Functional locking....................................................................................................................................... 24
6.2. Monitoring................................................................................................................................................... 24
6.2.1. Monitoring the pump circulation.................................................................................................................. 24
6.2.2. Pump programm......................................................................................................................................... 24
6.2.3. Pump test programm.................................................................................................................................. 24
6.2.4. Static pressure monitoring.......................................................................................................................... 25
6.2.5. Difference in temperature........................................................................................................................... 25
6.2.6. Maximum temperature limitation................................................................................................................ 25
6.2.7 Flue gas temperature limitation.................................................................................................................. 25
6.2.8. Flow sensor protection............................................................................................................................... 25
6.2.9. Frost protection.......................................................................................................................................... 25
6.2.10. Monitoring the fan speed............................................................................................................................ 25
6.2.11. Glow plug protection................................................................................................................................... 25
CHAPTER 7. MAINTENANCE 26
7.1. Annual maintenance.................................................................................................................................. 26
7.1.1. Checking the CO2percentage on full load................…………………………………………………………. 26
7.1.2. Measuring the load on the unit ................................................................................................................. 26
7.1.3. Checking the condensation water drain.......…………………………………………………………………… 26
7.1.4. Ionisation probe.......................................................................................................................................... 26
7.1.5. Water pressure........................................................................................................................................... 26
CHAPTER 8. MALFUNCTIONS 27
8.1. Draining the unit......................................................................................................................................... 27
8.2. No signal on the display............................................................................................................................. 27
8.3. Fault code U/d or U/O (alternating U with a status code will appear on the display................................... 27
8.4. Unit does not respond to central heating heat demand.............................................................................. 27
8.5. Unit does not respond to HWS demand...................................................................................................... 27
8.6. Three-way-diverter valve............................................................................................................................ 27
8.7. Check function of gas control..................................................................................................................... 27
8.8. Measuring the fan impedance.................................................................................................................... 27
8.9. Fitting instructions for the pressure sensor................................................................................................ 27

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8.10. Fitting instructions for the safety valve....................................................................................................... 28
8.11. Malfunction code „F“ (flashing)................................................................................................................... 28
8.11.1. Gas control will not open (no voltage)....................................................................................................... 28
8.11.2. Gas control will not open (gas inlet pressure too high).............................................................................. 28
8.11.3. Gas control will not open (coils defective)................................................................................................... 28
8.11.4. Gas/Air mixture is not correctly adjusted.................................................................................................... 28
8.11.5. Check glow plug......................................................................................................................................... 28
8.11.6. Check ionisation current............................................................................................................................. 28
8.11.7 inspection / cleaning / replacement of the ionisation probe........................................................................ 29
User manual 30
General...................................................................................................................................................................... 30
Cleaning the unit....................................................................................................................................................... 30
Holidays.................................................................................................................................................................... 30
Brrrr, the central heating is not working.................................................................................................................... 30
Electricity and gas..................................................................................................................................................... 30
Water and air....................... ..................................................................................................................................... 30
Other causes............................................................................................................................................................. 30
Display.............................................................. ....................................................................................................... 31
Reset button.............................................................................................................................................................. 31
Abbreviated display indications................................................................................................................................. 31

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CHAPTER 1.
1.1. Technical data 35C / 40C
Boiler type 35 / 40
Gas type natural gas G20 natural gas G25 LPG gas G30/G31
Mains voltage / Frequency 230 V / 50 Hz
Power consumption (max.) 144 W
Electrical data
Thermostat voltage 24 V
Height 600 mm
Width 360 mm
Depth 300 mm
Dimensions and
weight
Weight 35 kg
CO210 – 100 ppm
CO (0% 02) 12 – 35 ppm
Emission value
NOX(0% O2) 10 – 30 ppm
at 80/60ºC < 70ºC
Flue gas-
temperature at 50/30ºC < 35ºC
Maximum
chimney
resistance
Air feed and flue tube together 125 Pa
Gas Ø 15 mm
CH (flow and return) Ø 25 mm
Connections
Overflow Ø 15 mm
Eccentric Ø 60 – 60 mm
Air feed and flue
tube system Concentric Ø 80 / 125 mm
Water contents 0.8 L
Max. temperature 90°C
Boiler heat
exchanger
Max. Water pressure 3 bar
Pump high 40 dB(A)
Sound level
Pump low 30 dB(A)
Certification CE Identification number CE0063-AT3070
Boiler type 35
Gas type natural gas G20 natural gas G25 LPG gas G30/G31
Nominal gas pressure 20 mbar 25 mbar 37/50 mbar
Heat input CH (gross) 8.1 – 38.5 kW
Heat input CH (net) 7.3 – 34.7 kW
Nominal output CH at 80/60ºC 7.2 – 33.7 kW
Nominal output CH at 50/30ºC 7.9 – 36.1 kW
Efficiency at 80/60ºC (net) Low load = 98.1 %; High load = 97.2 %
Gas technical
data type 35
Efficiency at 50/30ºC (net) Low load = 108.4 %; High load = 104.2 %
Boiler type 40
Gas type natural gas G20 natural gas G25 LPG gas G30/G31
Nominal gas pressure 20 mbar 25 mbar 37/50 mbar
Heat input CH (gross) 8.1 – 41.1 kW
Heat input CH (net) 7.3 – 37.0 kW
Nominal output CH at 80/60ºC 7.2 – 36.0 kW
Nominal output CH at 50/30ºC 7.9 – 37.9 kW
Efficiency at 80/60ºC (net) Low load = 98.1 %; High load = 97.2 %
Gas technical
data type 40
Efficiency at 50/30ºC (net) Low load = 108.4 %; High load = 104.2 %

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1.2. Dimensional sketch
Free space
There must be sufficient space at the top and bottom to be able to suspend the unit and to be able to connect all feed and drain
pipes. Normally, roughly 300 mm is required.
It is recommended to leave a free space of 150 mm on the left (for servicing reasons) and 50 mm on the right of the unit.
The front of the unit must be easily accessible for servicing at all times.

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1.3. Unit components
No Description Manufacturer Coopra article code
1 Primary heat exchanger Coopra n.a.
2 Manager Coopra n.a.
3 Pump Wilo N00S110006
4
5
6 Glow plug Saint Gobain N00S070014
7 Ionisation probe Sapco N00S070020
8 Burner type 30 / 40 Furigas N00S020000
9 Vapour tray Coopra N00S020015
10 Gas valve Honeywell N00S020009
11 Fan Vibo N00S020006
12 Venturi type 40 Honeywell N00S020008
13 Water pressure sensor Huba N00S080028
14 Return sensor Honeywell N00S070008
15 Flow sensor Honeywell N00S07008
16 Safety device Emmeti xxxxxxxx
17 Float vent Emmeti xxxxxxxx
18
19 Flue gas temperature sensor Tasseron N00S070017
20 Type plate Coopra n.a.
21 Condensation water overflow Coopra n.a.
22 Gas connection Coopra n.a.
23 Central heating return Coopra n.a.
24 Central heating flow Coopra n.a.

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1.4. Diagrams
1.4.1. Functional flow diagram
F1
L
F2
N
+
-
FSP
-t
-t
-t
-t
-t
-t
BURNER
FLOW X17.6
X7.1
X7.2
X7.4
X14
X6.4
X6.1
X12
X8.6
X8.2
X4.4
X3.5
X3.4
X3.2
X3.1
X22.2
X22.1
X4.6
X4.5
X4.3
X4.1
X8.5
X8.4
X8.3
X8.1
X6.3
X9.2
X1.3
X10.2
X11.2
X9.1
X1.4
X10.1
X11.1
X16.7
X16.6
X16.3
X16.2
X15.2
X15.1
X15.3
X18.1
X18.3
X17.5
X19.1
X17.2
X19.2
X17.3
ROOM THERMOSTAT
24VAC
ROOM THERMOSTAT
230VAC
EbV THERMOSTAT
OPENTHERM
THERMOSTAT
PC CONNECTION
FLUE GAS
OUTSIDE
WATER PRESSURE +
P
-
RETURN
DHW INLET
EXTERNAL TANK
TANK THERMOSTAT
GLOW IGNITER
LN
IONISATION
GAS VALVE
230 VRAC
COMBUSTION FAN
325 VDC
ALARM CONTACT
MAXIMAL THERMOSTAT
(OPTIONAL)
DISPLAY
PE
230V 50 Hz N
L
FURIMAT-990
PE
PE
PE
DHW
CH
N
PE
PE
L1
L3
L2
N
X2.5
X2.4
X2.2
X2.1
X2.3
PUMP
230 VAC
PE
THREE-WAY VALVE
230 VAC

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1.4.2. Wiring diagram

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1.5. Operation
A fan sucks the air required for the combustion through the
air feed canal (A). Because the combustion air in the
venturi sucks an under pressure, the correct amount of gas
(G) is automatically added to the combustion air.
The flammable gas/air mixture thus obtained is fed to the
burner, via a mixing chamber, to be ignited at the surface of
the burner by a ceramic glow plug. The hot combustion
gases are efficiently fed through the heat exchanger, where
they give their heat to the water. The flue gases are fed
outside, through the flue tube (F), into a flue tube exhaust
canal.
The condensation water (H2O) thus obtained is discharged
into the sewer.
1.6. Boiler types
Atmos 40C
High efficiency boiler for central
heating only.
The Atmos boiler is a heating unit with compact dimensions
and a very high efficiency, with versions for domestic and
small commercial use for central heating.
The type plate, which specifies the type of gas etc. to be
used, for which the unit is set, is on the left side of the unit.
The unit is fixed to the wall with the aid of a separately
delivered assembly bracket or rear cabinet.
1.7. Specific caracteristics type 40
1.7.1. Burner assy N00S020000
1.7.2. Primair heat exchanger N00S040005
1.7.3. Venturi N00S020008
1.7.4. Pump N00S110006
1.8. Conditions of delivery
Coopra Advanced Heating Technologies b.v. supplies its
products according to the general conditions of delivery for
the metal and electro technical industry. Registered with the
Clerk of the District Court at Den Haag on 19 October 1998
under no. 119/1998.

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1.8. Configuration of flue tube and air supply
See figure below for an overview of possible configurations.
The units are approved for application on the drain
systems:
B23, C13(x), C33(x), C43(x), C53, C63(x), C83(x).
Preferably use flue tube materials, roof ducts and exterior
wall ducts with a quality mark.
With plastic drain materials, use a unit with a flue gas
temperature sensor.
1.9. Environmental conditions
The area in which the unit is installed must satisfy the
applicable regulations.
The wall must be able to bear the weight of the unit (loaded
weight approx. 40 kg).
If you use a different assembly surface than a bricky wall of
sufficient thickness, you must select suitable fixtures
yourself and properly install the unit.
The unit may not be fitted in a chemically aggressive
environment.
The unit with air feed and flue gas exhaust satisfies the
requirements of protection class IP44 and may therefore be
installed in a wet area.
Although the unit is fitted with an internal frost protection, it
may not be exposed to extremely low ambient
temperatures (lower than -10°C).
1.10. Permitted flue resistance
The total resistance of the flue tube and air supply together
may not be greater than 125 Pa.
Indication for the resistance values given in table below
apply to a flow rate of 60 m3/hour.
dia. 80 mm
Tube per metre 5.0 Pa
Bend 90°, R = 1.5 D 6.5 Pa
Bend 90°, R = 0.5 D 15.0 Pa
Bend 45°, R = 1.5 D 4.0 Pa
Bend 45°, R = 0.5 D 5.5 Pa
Roof duct (concentric,
1.25 m) 30.0 Pa
1.11. Heating of central heating water
If the room thermostat or space unit indicates that heat is
required for the central heating, the unit will heat the central
heating water as necessary. The power supplied is
automatically adapted to the heat required and is also
continuously variably adapted to the heat demand with the
use of an on/off thermostat.
When the thermostat indicates that the desired temperature
has been reached, the central heating water is no longer
heated. The central heating pump will continue to run for a
previously set time to distribute the heat evenly over the
heating installation.
A differential bypass valve must be installed on plants
where it may happen that various radiators are
simultaneously excluded from the circuit because of
closure of control or zone valves.
The by-pass valve must be mounted in the installation
between the flow and the return, provided that flow
direction indicated by arrow is respected.
To adjust the by-pass valve rotate knob of the graduated
scale on setting 2.5-3.0. This value corresponds to the
meters of pump head (m H2O).
Lock the screw on the groove knob.

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1.12. Pump and hydraulic resistance
The pump characteristic and the resistance graph of the
unit are given below.
If set on automatic function (menu setting) the electronics
switches the speed of the pump to “high” or “low”,
depending on the temperature demand:
• Dt > 30 °C : the pump runs „high speed“.
• Dt < 10 °C : the pump runs „low speed“.
Dt = Setpoint temperature deducted with the actual Flow
temperature.
1.14. Standards / Guidelines
With the installation of the unit, all local regulations must be
followed, where applicable, including the provisions of the
following standards and guidelines:
• Building Regulations
• Regulations for natural gas installations
• Regulations for LPG (if applicable)
• Guidelines for existing gas installations
• Safety requirements for central heating
installations
• Safety provisions for low voltage installations
• General regulations for drinking water installations
• Water authority regulations
• Ventilation in dwellings
• Supply of combustion air and exhaust
• House sewerage in homes and dwellings
• Fire Brigade regulations
• Factory Act regulations
• Regulations applicable to HWS water Ask for the
locally applicable regulations at the local water
company as they are different in some areas
1.15. General safety regulations
The installation may only be performed by a recognised
installer.
Take note that internal parts of the unit can carry a
dangerous electrical voltage (230 Volt).
Take note that the unit, the various pipes and the flue gas
exhausted by the unit can reach high temperatures (up to
90°C).
Before carrying out maintenance activities in or on the unit,
you must close the gas tap, switch off the electricity supply
and pull the mains plug out of the socket.
1.16. Water quality
The composition and quality of the system water has a
direct effect on the performance of the total system and the
life of the boiler heat exchanger. Great care must be used
with the addition and use of chemicals, water softeners,
oxygen binders, de-aerators, aerators and water filters as
they increase the chance of malfunctions.
Corrosive elements of certain additives can attack the
system and cause leakages; the build-up of undesired
deposits generally leads to fatal damage of the heat
exchanger.
00,2
0
0,2
0,3
0,6
Flow [m³/h)]
Pressure [bar]
0,7
0,5
0,4
0,1
0,4 0,6 0,8 1,0 1,2 1,4 1,6 1,8 2,0
Pump state high
Pump state low
Boiler resistance
2,2 2,4 2,82,6 3,0
0,8

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CHAPTER 2. INSTALLATION 2.2. Mounting the assembly bracket
To mount the assembly bracket on a brick wall of sufficient
thickness, use the screw plugs that are supplied. When you
have determined the place of assembly, proceed as
follows:
1. Draw the position of the hole (1) in the strap of the
assembly bracket.
2. Use a masonry drill of 8 mm diameter to drill a hole with
a sufficient depth in the wall.
3. Keep the hole (1) in the assembly bracket in front of the
hole in the wall and fit one of the screws supplied
through the assembly bracket in the hole.
4. Align the assembly bracket with the aid of a spirit level.
5. Use a masonry drill of 8 mm diameter to drill holes with a
sufficient depth in the wall through the two bottom holes
(2) in the assembly bracket.
6. Fit two of the screws supplied in the bottom holes.
7. When using assembly brackets with ac lamping plate for
eccentric flue tube and air feed connection:
- Use a masonry drill of 8 mm diameter to drill a hole
with a sufficient depth in the wall through the hole
in the clamping plate and fit a nail plug in this hole.
- Fit the clamping plate at right angles.
8. Fix the assembly bracket firmly by tightening all screws.

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2.3. Water and gas connections
2.3.1. Gas connection
• Connect the gas pipe to connection (5).
• Install the gas pipe stress free.
• Include an approved stopcock in the pipe.
• Carefully blow the gas pipe clean.
2.3.2. Central heating water connections
• Connect the central heating flow pipe to
connection (2.
• Connect the central heating return pipe to
connection (1.
• A differential bypass valve must be installed on
plants where it may happen that various radiators
are simultaneously excluded from the circuit
because of closure of control or zone valves.
• Install a filling and draining device in the central
heating system. Do not use the overflow valve as
a drain. The overflow valve is a safety valve that
ensures that the system is not subjected to a too
high pressure (max 3.0 bar).
• Stopcocks must be fitted in the central heating
flow pipe (2) and the central heating return pipe
(1).
• The central heating return pipe (1) must be fitted with
a suitable expansion vessel. The size of the
expansion vessel must be determined on the basis of
the central heating water temperature and the total
water content the installation contains.
• If it may be expected that the central heating
water will be severely contaminated by under floor
heating, fitting is a 2 kg dirt filter in the return pipe
is recommended. Atmos cannot give a guarantee
for damage to the unit that is caused by dirt in the
system.
• Before connecting the boiler unit, rinse the system
completely to remove all contamination.
2.4. Seal on the waterside
With the use of the group of taps, you can now make a
check on the seal on the waterside of the system.
2.5. Draconin connection
There must be a connection for the removal of the
condensation water to the drain. This connection must be
fitted with a trap to prevent smell problems.
A tundish connection must be made because of possible
overpressure or underpressure in the drain.
Fit the condensation drain pipe (6) (inner diameter 40 mm
minimum) several centimetres left of the gas pipe.
2.6. Electricity connection
There must be an electrical outlet with earth connection
available at a maximum distance of 1 m from the unit.
The electricity connection (230 VAC) must consist of live,
neutral and earth
A good earth connection is a requirement for good
operation of the unit.

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CHAPTER 3. SUSPENDING THE UNIT
3.1. The unit
Before unpacking the unit, check
whether the type of gas to be used
corresponds with the specification
on the packing. If you have any
questions, contact your supplier.
To prevent back injury, take
account of the fact that the weight
of the unit is roughly 35 kg.
3.2. Suspension
Place an O-ring in the middle of each of the connections
present (1) - (5).
Remove the caps from the pipes of the unit.
Keep the unit straight against the wall at about 5 cm above
the site of the mounted assembly bracket or the assembly
cabinet.
Press the unit into the guide and let it drop carefully, so that
the hook on the suspension bracket falls into the opening at
the rear of the unit and the pins at the bottom of the unit fall
in the corresponding openings in the suspension bracket.
Here, the connection pipes of the unit fall over the
connection points of the suspension bracket.
Firmly tighten the union nuts of each of the connections
present (1) to (5) with the aid of a spanner.
3.3. Fitting the flue tube and air supply
3.3.1. Connecting the eccentric flue and air supply (2-
pipe system)
When the flue tube and air supply are connected
eccentrically, proceed as follows:
1. Fit the flue tube in the opening, in the suspension
bracket.
2. Let the pipe protrude 30 -35 mm under the clamping
plate.
Slide the sliding piece (1) upwards over the flue tube.
3. Fit the air supply in the opening in the suspension
bracket.
4. Let the pipe protrude 40 - 45 mm under the clamping
plate.
5. Fit the rubber bellows over the air supply pipe and seal
them with the hose clip.
6. Fit the clamping plate on the suspension bracket and
tighten it with the three screws supplied. Take care here
that the clamping plate falls in the groove of the sliding
piece.
3.3.2. Connecting the concentric flue tube and air
supply (80/125 mm adapter)
When the flue tube and air supply are connected
concentrically, proceed as follows:
1. Fit the 80/125 mm adapter on the unit before you place
the unit.
2. After you have placed the unit, fit the concentric pipes on
the 80/125 mm adapter.
3.3.3. Connecting the concentric flue tube and air
supply (60/100 mm adapter)
When the flue tube and air supply are connected
concentrically, proceed as follows:
1. Fit the 60/100 mm adapter on the unit before you place
the unit.
2. After you have placed the unit, fit the concentric pipes on
the 60/100 mm adapter.
3.4. Condensation water drain/overpressure protection
on drain
Make a tundish between the condensation water
drain/overpressure protection of the unit and the drainpipe.
3.5. Connection block
The connections of the green connection block are all volt-
free contacts. Therefore, do not connect 230 Volts to them!
terminals (1) - (2) Connection for 24 Volt thermostat
terminals (3) - (4) Connection for 12 kOhm external
temperature sensor
terminals (5) - (6) Connection for 10 kOhm or 12 kOhm
sensor of external cylinder
If no on/off room or modulating room thermostat is used at
all, terminals (1) and (2) must be connected by wire.
3.5.1. On/off room thermostat (if applicable).
Connect to terminals (1) and (2)
The on/off room thermostat (24 V) must be fitted in the
same building as the unit.
Strip about 5 mm off the insulation of the wires of the room
thermostat. Stick the stripped ends of the wires into
connections (1) and (2) of the connection block. Make sure
that the wires do not make a short circuit. Firmly tighten the
screws in the connection block.
3.5.2. Modulating room thermostat (if applicable).
Connect to terminals (1) and (2)
The modulating room thermostat must be fitted in the same
building as the unit.
Strip about 5 mm off the insulation of the wires of the room
thermostat. Stick the stripped ends of the wires into
connections (1) and (2) of the connection block. Make sure
that the wires do not make a short circuit. Firmly tighten the
screws in the connection block.

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When using a modulating thermostat, the plug on the
printed circuit board must be connected with the correct
polarity.
To reach the printed circuit board, the black casing must be
opened. Connect the plug for the relevant modulating
space unit to terminal a, b or c, according to the following
photograph.
a White
Connection for an on/off
room thermostat
24 Volt
b Red Connection for RS30 with
Coopra protocol
EBV space
regulation
c Blue Opentherm connection Honeywell or TEM
space regulation
3.5.3. Connection for the external temperature sensor
(if applicable).
Connect to terminals (3) and (4)
If an external sensor is connected, this temperature sensor
must be an NTC with a resistance of 12 kOhm at 25°C.
Strip about 5 mm off the insulation of the wires of the
sensor. Stick the stripped ends of the wires into
connections (3) and (4) of the connection block, see figure
8. Make sure that the wires do not make a short circuit.
Firmly tighten the screws in the connection block.
If an external sensor is not used, terminals (3) en (4) can
remain open.
3.6. Assembling the connection block
Connect the green
connection block in the
green socket.
3.7. Placing the jacket
Place the jacket in the appropriate hooks at the top of the
unit. Let the jacket pivot until it falls over the unit. Tighten
the fastener at the bottom of the jacket.
b
a
c

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CHAPTER 4. COMMISSIONING
4.1. Electrical connection 230 VAC
• If the boiler is provided with a supply cord and a plug
the appliance must be positioned so that the plug is
accessible.
• If the boiler is not provided with a supply cord without
a plug the supply must have a contact separation of at
least 3 mm in all poles.
If the supply cord is damaged, it must be replaced by the
service agent or similarly person in order to avoid a hazard.
4.2. Main switch
To power up the appliance
please switch the main
switch on.
If the display of the unit gives
the status code ‘U’
(alternately with an arbitrary
other code), this means the
live and neutral
connections are reversed. Isolate the supply and reverse
the connections.
4.3. Filling
During filling with water, the unit must be connected to the
mains and be switched on. Fully open all radiator taps.
Connect the water supply to the filling connection. If the
unit is not yet filled with water, the display shows a flashing
‘P’. The two numbers on the display give the water
pressure.
Open the tap to fill the system with water.
When the water pressure is sufficient (> 1.3 bar), the
flashing ‘P’ disappears from the display.
Close, after filling, the filling tap again.
4.4. Reading the water pressure
It is possible to read the water pressure directly from the
display. To do this, press the + button of the display for a
minimum of 5 seconds.
The unit switches out of the menu back to normal
operation:
• automatically after about 5 minutes;
• or if you press the - button of the display shortly.
4.5. Venting
After filling, the heating installation must be vented.
Proceed as follows:
Follow the instructions from the manufacturer/installer for
the venting of possible other elements of the heating
installation, such as underfloor heating.
Fully open all radiator taps.
Open the air bleed cocks of the radiators one at a time.
Use an air bleed key for this.
As soon as water comes out of the air bleed cock, shut the
cock off again.
4.6. Chimney sweeper function
The chimney sweeper function has priority over the central
heating and HWS regulation.
The chimney sweeper
function is activated by
simultaneously pressing the
"+ and the – buttons" of the
display in for longer than 5
seconds.
The ionisation current can be read in microamperes in the
two right segments.
The capacity that is immediately released is the maximum
central heating capacity.
Press the "- button" to
go to low load.
Press the "+ button"
to switch back to the preset
full load capacity.
4.7. Gas / Air Ratio
(1). Venturi screw – Full load adjustment
Turn the venturi screw anti-clockwise to increase the CO2
value, clockwise to decrease it.
(2). Gas control screw – Low load adjustment
Turn the screw anti-clockwise to decrease the CO2value
on low load, clockwise to increase it.
(3). Cover screw

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Pre-adjustment to be done in voltage-free condition:
- LPG GAS – Turn venturi-screw clockwise 3
completely down on its seat.
Then turn the venturi screw anti-clockwise 4
for 2 complete turns.
- NATURAL GAS – Turn venturi-screw clockwise 3
completely down on its seat.
Then turn the venturi screw anti-clockwise 4
for 4 complete turns.
With a vernier callipers the distance between venturi-screw
(1) and the Top of the venturi-stud (1) has to be measured
to find the rough setting of the venturi screw for full load,
and depending of the used gastype.
The exact adjustment of the setting has to be made using
the CO2analysing method as described below.
4.8. Gas / Air adjustment ( CO2analysing)
The gas control is set in the factory to the type of gas to be
used. This type of gas is stated on the packing and on the
identification plate. To check the setting, you have to make
a flue gas analysis.
Proceed as follows
Remove the measuring cap
from the flue tube.
Fit the measurement probe
of a flue gas analyser (CO2
meter) in the measurement
opening of the flue tube
canal.
Make sure there is sufficient
heat dissipation through the
heating.
CO2setting At full central
heating load
(P=100%)
At low load
Natural gas
(G20, G25)
8,8-9.4 % CO28,2-8,6 % CO2
Propane (G31) 9,8 % CO29,2% CO2
4.8.1. Full load
The burner has to burn at maximum central heating
capacity (Menu setting P=100%).
Activate the chimney sweeper function on full load.
Read the CO2value on the
analyser. If the value does
not correspond with the
value in the "CO2setting"
table, carefully adjust the
venturi screw (1). Turn the
venturi screw anti-clockwise
to increase the CO2value,
clockwise to decrease it.
4.8.2. Low load
Activate the chimney sweeper function on low load
Read the CO2value on the
analyser. If the value does
not correspond with the
value in the "CO2setting"
table, carefully adjust the
gas control adjusting screw
(2). To do this, temporarily
remove the cap (3) with the
aid of a Torx screwdriver.
Turn the screw anti-clockwise to decrease the CO2value
on low load, clockwise to increase it.
At the end of the flue gas analysis, set the central heating
capacity (P) in the menu again to the value that is best
suited for the application.
4.9. Placing the jacket
Place the jacket in the appropriate hooks at the top of
the unit. Let the jacket pivot until it falls over the unit.
Tighten the fastener at the bottom of the jacket.
4.10. Changing over to LPG-gas
First: the venturi adjusting screw fully clockwise until
it blocks.
Fit a flue gas analyser
(CO2meter) in the
measurement opening of
the flue tube canal.
4.10.1. Full load on Propane
Set in the menu the capacity “P” to 100%.
Activate the chimney sweeper function on full load.
Unscrew the venturi adjusting screw four full turns anti-
clockwise.
(A guide for the dimension from the top of the screw to the
top of the support is 16.1 mm).
Read the CO2value on the flue gas analyser. If the value
does not correspond with the value for propane gas G31
(9,8% CO2), carefully adjust the venturi screw until the
correct value is obtained.
If the gas control is already
properly adjusted for natural
gas, then the low load will
not need to be adjusted.
Activate the chimney
sweeper function on low
load.
Check the CO2value at
minimum capacity for propane gas G31 (9.2% - 9.5% CO2).
If necessary, adjust the gas regulator screw until the
correct value is obtained. Note that this setting is a critical
one.
PRE- ADJUSTMENT MEASUREMENT:
Distance between Venturi-screw (1) and the Top of the
venturi-stud to be about:
 12.5 mm for natural gas G25
 14.1 mm for natural gas G20
 16,5 mm for LPG gas G31

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4.11. Display
A = display
B = + button
C = Set / Reset
D = Status display
E = - button
During operation, the display shows the status of the
unit in the form of a code. To be able to read the codes,
open the cover in front of the display. The display
consists of three 7-segment LED’s + three decimal
points and three pushbuttons.
The left 7-segment LED shows the status or the menu
step.
The two right 7-segment LED's show the temperature,
the pressure or the parameter value.
4.11.1. Normal operation (permanent status indication)
The Normal operation is to indicate the burner action.
- - Initialisation after restoration of supply power
O No heat demand, stand-by
C Central heating heat demand, burner off
C. Central heating heat demand, burner on
P/C. Central heating heat demand, low load water pressure
A/C. Central heating heat demand, low load chimney temperature
c Central heating pump post-running
b Burner off / post-running of pump for external HWS cylinder
b. Burner on
P/b. Boiler, low load by water pressure
A/b. Boiler, low load by chimney temperature
O Frost protection burner off pump running 8C
o. Frost protection burner on 3C
C (flashing) Chimney function (temp display max/min/ionisation)
4.11.2. Blocking operation (permanent status indication)
The burner stopped burning due to an incorrect situation. The display gives a permanent indication (not flashing) and the
operation can be restored by switching it off and on (volatile block).
U/
code Reversed neutral and line Power supply line not correctly connected
1 Flow sensor open circuit Faulty flow sensor
Wiring interrupted or not correctly connected
1. Flow sensor short circuit Faulty flow sensor
Faulty wiring
2 Return sensor open circuit Faulty return sensor
Wiring interrupted or not correctly connected
2. Return sensor short circuited Faulty return sensor
Faulty wiring
4 Flue gas sensor open circuit Faulty flue gas sensor
Wiring interrupted or not correctly connected
6 Cold water sensor open circuit n.a.
6. Cold water sensor short circuited n.a.
A Flue gas temperature > 80°C The burner is reduced to low load
H Flow sensor > 105°C while the burner was off Reset the supply power by the on/off switch
E Internal error Reset the supply power by the on/off switch
P Pump test / Start function blocking / Water pressure
Check the central heating system pressure
Seized or faulty pump or faulty pump wiring
Faulty pressure sensor or wiring
nc Burner Manager fault Reset the supply power by the on/off switch
4.11.3. Lock-out (flashing status indication)
In case of lock-out the display gives a flashing indication and the operation can be restored by pressing the reset button, placed
on the control panel.
1 Boiler does not pass start temperature test Check system water flow; second system pump
2 Too many restarts
3 Internal regulation fault / A/D conversion fault /
external sensor fault /Too many restarts
5 Fan fault
7 Gas valve fault
8 Flame detected with closed gas valve Check gas valve
A Flue gas temperature > 95°C Check why flue gas becomes temperature > 95°C
E Internal interlock fault Reset the supply power by the on/off switch
H Flow sensor > 105°C with burner on Check system water flow
F Too many ignition attempts
O Gas valve connection Check short cut wire on print board terminal X4

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4.12. Menu structure
By pressing the set/reset button in for longer than 5 seconds, you go to the ‘mode’ menu.
To change the subsequent "Letter" parameter, the user must press the Set/Reset button.
To change the “Range” setting in the parameter, the user must press the “+” or the “–“ button.
Letter Description Range Factory setting Field of application
C max. set point of central heating 25°C - 90°C 82°C
O Central heating post-running time 1 - 25 min, CO = 24 hours 5 min
P Max central heating capacity 33 – 100 % 80 %
H Type of application
0 = central heating unit
1 = n.a.
2 = for external HWS cylinder 12kOhm
3 = for external HWS cylinder 10kOhm
4 and 5 = all functions are blocked
unit-dependent unit-dependent
d
t
b Set point for storage HWS cylinder 40°C -70°C 60°C external storage
vessel
O/b Basic temperature
External characteristic 10 -70°C 20°C
O/S Slope
External characteristic 1-100 20
O/d Day reference temperature 0°C -70°C 20°C
These three settings
are only active when
an external sensor is
connected
r Factory setting = Factory setting
= Changed factory setting
If you switch back to the factory setting,
this has no effect on the H, S and P/S
settings
S Pump speed
00 = automatic
= always high
= always low
00 = automatic
P/S Maximum pressure jump
= 0.54
= 0.53
= 0.52
= 0.54
In the View mode, you can read the actual values of:
8 = Water pressure (in bar)
1 = Flow temperature (in °C)
2 = Return temperature (in °C)
3 = Inlet cold water temperature / HWS sensor (in °C)
4 = External temperature (in °C)
5 = Outside temperature (in °C)
6 = Flue gas temperature (in °C)
7 = Flame signal (in µA DC)
9 = Last interlock
A = Last blocking