Atlantic Boilers VF Series Instruction Manual

ATLANTIC 2000 - boilerplant sales ACM ATLANTIC - commissioning and maintenance ATLANTIC 4422 – spares
Atlanc 2000 Registered in England Company No: 1477687 Vat Reg No: 306 0653 89
PO BOX 11, ASHTON UNDER LYNE, OL6 7TR T: 0161 621 5960 E: technical@atlancboilers.com www.atlancboilers.com
VF SERIES
GAS CONDENSING BOILER
INSTALLATION & MAINTENANCE MANUAL
MODELS 40 - 60 - 80 - 100

14.03.2016 Page 3 / 130
CONTENTS
1. WARNINGS AND RECOMMENDATIONS..............................................................................5
1.1. Transport and storage ................................................................................................................................... 5
1.2. Symbols used in this document. ................................................................................................................... 5
1.3. Qualification of personnel for installing, adjusting, using and maintaining the equipment ............................ 5
1.4. Safety instructions......................................................................................................................................... 6
1.5. Water characteristics..................................................................................................................................... 6
2. APPROVALS ..........................................................................................................................9
2.1. Compliance with European Directives .......................................................................................................... 9
2.2. Regulatory installation conditions.................................................................................................................. 9
1.6. Gas category................................................................................................................................................. 9
1.7. Gas supply pressures ................................................................................................................................. 10
3. TECHNICAL SPECIFICATIONS...........................................................................................11
3.1. Dimensions ................................................................................................................................................. 11
3.2. Boiler components ...................................................................................................................................... 13
3.3. Combustion at 15°C and 1013 mbar........................................................................................................... 15
3.4. Conditions of use ........................................................................................................................................ 17
3.5. Electrical connection ................................................................................................................................... 17
4. INSTALLATION.....................................................................................................................18
4.1. Installing the boiler ...................................................................................................................................... 18
4.2. Removing / installing the front panels ......................................................................................................... 19
4.3. Exhaust connection..................................................................................................................................... 19
4.4. Gas connection ........................................................................................................................................... 26
4.5. Gas change (G20 to G31, only 40 kW to 100 kW)...................................................................................... 27
4.6. Hydraulic connection................................................................................................................................... 30
4.7. Electrical connection ................................................................................................................................... 32
5. FIRST USE............................................................................................................................36
5.1. Checks before first use ............................................................................................................................... 36
5.2. First use ...................................................................................................................................................... 36
6. CHECKS AFTER COMMISSIONING....................................................................................37
6.1. Condensate removal ................................................................................................................................... 37
6.2. Gas supply .................................................................................................................................................. 37
7. MAINTENANCE OPERATIONS ...........................................................................................38
7.1. Draining the boiler ....................................................................................................................................... 38
7.2. Annual checks............................................................................................................................................. 39
8. END-OF-LIFE CYCLE OF THE APPARATUS......................................................................41
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1. WARNINGS AND RECOMMENDATIONS
PLEASE READ THIS MANUAL CAREFULLY BEFORE INSTALLING,
CARRYING OUT MAINTENANCEAND USING THE BOILER. IT CONTAINS
IMPORTANT SAFETY INFORMATION.
1.1. Transport and storage
The boiler:
- must be stored vertically in an environment where the temperature is
between -20°C and +55°C, and where relative humidity is between 5%
and 95%;
- must not be stacked,
- must be protected from humidity.
1.2. Symbols used in this document.
INFORMATION: This symbol draws attention to comments.
!WARNING: Not following these instructions may lead to
damage when installing or to other objects.
!DANGER: Not following these instructions may cause
injuries and serious material damage.
DANGER: Not following these instructions may cause
electrocution.
1.3. Qualification of personnel for installing, adjusting, using and
maintaining the equipment
Boiler installation, adjustment and maintenance operations must be
conducted by a qualified and approved professional in accordance with
prevailing local and national regulations. These operations may require work
to be carried out with the power turned on and the casing doors (on the front
of the boiler) open.
Basic utilisation operations must be carried out with the casing doors closed.
18.03.2016 Page 5 / 130

1.4. Safety instructions
• Always switch the boiler off and shut off the general gas supply before
carrying out any work on the boiler.
• After performing work on the boiler (maintenance or breakdown), check
that there are no gas leaks from the installation.
!DANGER:
If you smell gas:
• Do not use a naked flame, do not smoke, do not turn on electrical
contacts or switches.
• Cut off the gas supply.
• Air the premises.
• Look for the leak and repair it.
!DANGER:
If you see smoke:
• Switch off the boiler.
• Air the premises.
• Look for the leak and repair it.
DANGER:
This boiler's earth bonding is ensured with connecting cables (green/
yellow) and specific attachment screws. During any dismantling work,
make sure you reconnect the cables concerned; it is IMPERATIVE to
reuse the original attachment screws.
1.5. Water characteristics
The following rules apply as soon as the boiler is commissioned and remain
valid until the product’s end-of-life.
!DANGER: It is forbidden to use water containing glycol.
1.5.1. Preparation of the water circuit before commissioning the boiler
For all installation work (new or renovation), the water network pipes must be
meticulously cleaned. The purpose of cleaning prior to commissioning is to
remove germs and residues which are the cause of deposits.
In new installations in particular, residue from grease, oxidised metal and
even copper micro deposits must be removed.
In renovated installations, cleaning should focus on removing sludge and the
products of corrosion formed when the unit was last in operation.
There are two types of methods for cleaning and removing sludge: a high
intensity approach that takes a few hours and a slower, more gradual
approach that takes several weeks. This first type of cleaning must be done
before connecting the new boiler, and with the second type, a filter should be
Page 6 / 130 00RNO0182-#

installed on the back of the boiler to capture loosened deposits.
Cleaning prior to commissioning helps to improve the equipment’s
performance, reduce energy consumption and fight against scaling and
corrosion. This operation must be done by a professional (water treatment).
1.5.2. Protecting the unit against scaling
Water naturally contains dissolved calcium ions and carbonates that cause
scaling (calcium carbonate) to form. To prevent excessive deposits, take
precautions with regard to the water used to fill the unit TH < 10°f
Water must be added during the life of the boiler. The new water adds scaling
to the water system. The amount of fill water and the amount of make-up
water added throughout the unit’s lifecycle must not be more than three times
the water capacity of the heating system. Also, the hardness of the make-up
water must be controlled. Make-up water: TH < 5°f
Adding a large amount of untreated water always contributes a significant
amount of scaling. To monitor this and to detect problems, a system water
meter must be installed.
Failure to comply with these guidelines (such that the fill water plus the make-
up water is more than three times the water capacity of the heating system)
requires a full cleaning (to remove sludge and scaling) to be performed.
Additional precautions are required for operation:
- When the unit has a water softener, the equipment must be inspected
on a regular basis in order to ensure that it is not outputting chloride-
rich water into the system. The concentration of chlorides must always
remain below 50 mg/litre.
- To prevent the build-up of calcium deposits (such as on exchange
surfaces), the unit should be brought into service slowly, starting by
operating at a low power with high primary water flow.
- When the tap water lacks the desired qualities (e.g. high level of
hardness), water treatment is required. The fill water must be treated,
and whenever new water is added, the make-up water must also be
treated.
- Installations with multiple boilers require all of the boilers to be started
simultaneously at minimal power. Doing this prevents the calcium in the
water from depositing on the exchange surfaces of the first boiler.
- When working on the unit, avoid draining it completely; only the required
parts of the system are to be drained.
The rules listed above are designed to minimise scaling on the exchange
surfaces and thus to increase the life of the boilers.
To optimise the equipment’s operation, remove lime scale deposits. This
must be done by a specialised company. Also, before putting the unit into
service, verify that the heating system is not damaged (e.g. leaks). If it has
excessive scaling, the unit’s settings for operation and for water treatment
must be adjusted.
1.5.3. Protecting steel and stainless steel boilers against corrosion
Corrosion can affect the iron components used in boilers and heating
systems, which is directly related to the presence of oxygen in the water
heater’s water. Dissolved oxygen that enters the unit when it is being filled
18.03.2016 Page 7 / 130

for the first time reacts with the equipment materials and quickly disappears.
Without refreshing the oxygen through significant contributions of water, the
unit might not experience any damage whatsoever.
However, it is important to follow the sizing rules and installation guidelines
in order to prevent oxygen from continuously flowing into the heating water.
These rules include:
- Opt for an expansion vessel with a membrane rather than an open
expansion vessel that allows direct passage.
- Make sure pressure in the equipment is more than 1 bar when cold.
- Remove non-gas-tight components (permeable) and use gas-tight
equipment instead.
If the guidelines above are followed, the unit’s system water has the proper
characteristics to last a long time: 8.2 < pH < 9.5 and concentration in
dissolved oxygen < 0.1 mg/litre.
If there is a chance that oxygen could enter the unit, you must take additional
precautions. Adding an oxygen scavenger (e.g. sodium sulphite) is highly
recommended. We recommend you contact specialised companies for
water treatment issues, which will be able to suggest:
- the appropriate treatment based on the characteristics of the installation,
- a monitoring and performance warranty contract.
For units in which the water comes into contact with heterogeneous materials,
such as copper or aluminium, appropriate treatment is recommended in order
to ensure that the unit will last. In most cases, this consists of adding corrosion
inhibitors (in the form of chemical solutions) to the unit. It is recommended to
contact water treatment specialists.
1.5.4. Unit monitoring
If the above recommendations are followed (new installation or renovation),
it should be sufficient to:
- check the amount of make-up water (fill water volume + make-up water
volume < 3 times the unit volume.
- check the pH level (stable or slightly increasing).
- check the TH (stable or slightly decreasing).
We recommend these checks are carried out 2 to 3 times a year. Note that
monitoring the quantity of make-up water is critical to the long life of the unit.
If any of these three parameters deviates from the above recommendations,
refer to a water treatment specialist to correct the problem.
1.5.5. Installation of the plate exchanger
If the recommendations above cannot be met, you can set up a plate
exchanger to separate the primary system from the secondary system, which
protects the boiler from undesirable effects.
1.5.6. Installation of a filtration system
A filtration system (filter, sediment well, etc.) on the back of the boiler is
recommended in order to remove suspended particles from the unit.
Page 8 / 130 00RNO0182-#

18.03.2016 Page 9 / 130
2. APPROVALS
1.6. Gas category
This boiler has been adjusted in the factory to work with group H natural
gas (type G20) with a supply pressure of 20 mbar.
See chapter 4.4 for how to change the gas, and use a qualified professional.
INFORMATION: Any work on a sealed component will lead to loss of the guarantee.
VARFREE
CATEGORY
AT - CH - CZ - GR -
LT - PT - RO - SI - SK
DK - EE - FI - LV -
NO - SE
40 - 60 - 70 - 80 - 100 kW II2H3P I2H
120 kW I2H I2H
2.1. Compliance with European Directives
- Low voltage (2006/95/EC)
This appliance is not intended for use by persons (including children)
whose physical, sensory or mental abilities are reduced, or persons
without experience or knowledge, unless they have been able to
benefit, through someone responsible for their safety, from supervision
or prior instruction concerning the use of the appliance.
Children must be supervised to ensure they do not play with the
appliance.
- Electromagnetic compatibility (2004/108/CEE)
- Gas appliances (2009/142/CE)
- Energy labelling (2010/30/EU):
In application of the directive and according to the requirements of the
EU regulation No. 811/2013 of 18 February 2013, the information on
condensation boilers with a power of less than or equal to 70 kW is
available in appendix A.
- Eco-design (2009/125/EC):
In application of the directive and according to the requirements of
the EU regulation No. 813/2013 of 02 August 2013, the technical
parameters of condensation boilers with a power of less than or equal
to 400 kW are available in appendix A.
2.2. Regulatory installation conditions
The appliance must be installed by an approved professional in accordance
with regulations and current professional practices.

Page 10 / 130 00RNO0182-#
1.7. Gas supply pressures
INFORMATION: The pressures given below should be measured at the input to the
gas valve.
H G20
natural gas
G31
propane
Nominal pressure (mbar) 20 37
Minimum pressure (mbar) 17 25
Maximum pressure (mbar) 25 45

figure 1 - Dimensional characteristics
A
B
C
DEE
F
G
H
I M
L J
Ø T
Ø U
X
Ø S
Ø R
Ø Q
Ø V Ø W
P
YO
N
3. TECHNICAL SPECIFICATIONS
3.1. Dimensions
U0561520-#
18.03.2016 Page 11 / 130

MODELS
40 kW 60 kW 80 kW 100 kW 120 kW
A (mm) 541
B (mm) 477 574 692
C (mm) 890
D (mm) 408
E (mm) 66,5
F (mm) 12,3
G (mm) 103,5
H (mm) 85,5
I (mm) 86
J (mm) 133
L (mm) 190
M (mm) 95
N (mm) 241 242,5
O (mm) 143,5 120
P (mm) 86 111
Ø Q Heating return connection G 1"1/4
Ø R Gas supply G 1"
Ø S Heating outlet connection G 1"1/4
Ø T Safety valve connection G 1/2" (female)
Ø U Condensate evacuation (mm) 24
Ø V Air inlet (mm) 125 150
Ø W Fume duct (mm) 80 100
XValve angle 16°
Y (mm) 45
Page 12 / 130 00RNO0182-#

3.2. Boiler components
figure 2 - Boiler components for 40 and 60 kW models
U0561578-#
1Gas valve
2Fan
3Ionisation electrode
4Ignition electrode
5Ignition transformer
6Fume temperature sensor
7Bleed valve
8Water return temperature sensor
9Flowmeter
10 Water outlet temperature sensor
11 Pressure sensor
12 Anti-return flap
13 Condensate siphon (supplied unmounted)
14 User interface control panel
15 NAVISTEM B3000 unit
16 Air pressure switch
17 Safety thermostat
4
5
16
1
8
76
3
17
15
14
13
12
11
9
10
2
view without
NAVISTEM B3000
18.03.2016 Page 13 / 130

1Gas valve
2Fan
3Ionisation electrode
4Ignition electrode
5Ignition transformer
6Fume temperature sensor
7Bleed valve
8Water return temperature sensor
9Flowmeter
10 Water outlet temperature sensor
11 Pressure sensor
12 Anti-return flap
13 Condensate siphon (supplied unmounted)
14 User interface control panel
15 NAVISTEM B3000 unit
16 Air pressure switch
17 Safety thermostat
18 CEM filter (VARFREE 120 kW)
figure 3 - Boiler components for 80 to 120 kW models
U0561578-#
1
8
11
9
3
7
10
16
6
5
15
4
14
17
13
2
18
12
view without NAVISTEM B3000
Page 14 / 130 00RNO0182-#

3.3. Combustion at 15°C and 1013 mbar
3.3.1. G20 natural gas
Nominal power Pn (80/60°C) kW
Nominal power when condensing P (50/30°C) kW
Minimal power Pn (80/60°C) kW
Nominal heat input Qn kW
Ignition heat input Qall kW
Minimum heat input Qmin kW
Gas flow rate at Pn m3/h
CO2value ranges %
Flue-gas mass flow rate (80/60°C)
Qn
Qall
Qmin
g/s
Flue-gas mass flow rate (50/30°C)
Qn
Qall
Qmin
g/s
Flue-gas temperature (80/60°C)
Qn
Qall
Qmin
°C
Flue-gas temperature (50/30°C)
Qn
Qall
Qmin
°C
Inside diameter of flue-gas output mm
Maximum allowable nozzle pressure
(B23P) (80/60°C)
Qn
Qall
Qmin
Pa
Maximum allowable nozzle pressure
(B23P) (50/30°C)
Qn
Qall
Qmin
Pa
Combustion air flow rate at Qn m3/h
NOx class
Flue-gas removal and air inlet type classifications
MODELS
40 kW 60 kW 80 kW 100 kW 120 kW
40,0 56,4 79,8 95,7 119,5
43,0 61,0 87,5 104,5 129,5
8,3 11,5 17,1 19,0 23,9
41,2 58,0 82,3 98,5 123,0
21,8 23,5 26,1 30,5 39,0
8,5 11,8 17,6 19,6 24,6
4,4 6,1 8,7 10,4 13,0
at Qmin: 8,7 % < CO2< 8,9 %
at Qmax: 9,1 % < CO2< 9,3 %
18,4
9,8
3,8
26,0
10,5
5,3
36,9
11,7
7,7
44,1
13,7
8,8
55,1
17,5
11,0
17,5
9,3
3,5
25,0
10,1
5,1
35,6
11,2
7,5
42,7
13,3
8,5
52,5
16,7
10,2
80
65
61
76
63
62
74
58
57
76
61
62
70
56
56
62
42
39
60
39
38
53
33
34
57
38
38
52
31
32
80 80 100 100 100
156
33
20
200
31
20
179
15
15
187
17
17
200
32
20
122
27
20
174
27
20
149
14
14
159
17
17
200
31
20
51,8 72,8 103,4 123,7 154,5
6
B23, B23P
C13, C33, C53
18.03.2016 Page 15 / 130

3.3.2. G31 Propane Gas (for relevant models)
Nominal power Pn (80/60°C) kW
Nominal power when condensing P (50/30°C) kW
Minimal power Pn (80/60°C) kW
Nominal heat input Qn kW
Ignition heat input Qall kW
Minimum heat input Qmin kW
Gas flow rate at Pn m3/h
CO2value ranges %
Flue-gas mass flow rate (80/60°C)
Qn
Qall
Qmin
g/s
Flue-gas mass flow rate (50/30°C)
Qn
Qall
Qmin
g/s
Flue-gas temperature (80/60°C)
Qn
Qall
Qmin
°C
Flue-gas temperature (50/30°C)
Qn
Qall
Qmin
°C
Inside diameter of flue-gas output mm
Maximum allowable nozzle pressure
(B23P) (80/60°C)
Qn
Qall
Qmin
Pa
Maximum allowable nozzle pressure
(B23P) (50/30°C)
Qn
Qall
Qmin
Pa
Combustion air flow rate at Qn m3/h
NOx class
Flue-gas removal and air inlet type classifications
MODELS
40 kW 60 kW 80 kW 100 kW
40,0 56,4 79,8 95,7
42,1 59,7 85,6 102,3
8,3 11,5 31,9 33,5
41,2 58,0 82,3 98,5
21,8 18,0 32,9 34,5
8,5 11,8 32,9 34,5
1,7 2,4 3,4 4,0
at Qmin : 9,9 % < CO2< 10,1 %
at Qmax : 10,3 % < CO2< 10,5 %
18,5
9,8
3,8
26,0
8,1
5,3
36,8
14,8
14,8
44,1
15,5
15,5
18,3
9,6
3,7
25,7
7,9
5,2
35,3
14,6
14,6
44,0
15,3
15,3
81
66
62
78
64
63
73
60
60
75
60
60
65
44
40
60
42
40
52
34
34
56
34
34
80 80 100 100
126
29
20
200
19
19
150
24
24
138
20
20
112
24
20
177
16
16
129
22
22
129
20
20
51,8 73,0 103,5 123,9
6
B23, B23P
C13, C33, C53
Page 16 / 130 00RNO0182-#

MODELS
40 kW 60 kW 80 kW 100 kW 120 kW
230 V AC (+10% -15%), 50Hz
68 138 141 160 206
113 194 196 268 348
3
DHW sensor: 10
External sensor: 40 in 0.5 mm² (120 in 1.5 mm²)
Ambient thermostat: 200 in 1.5 mm²
Ambient sensor: 200 in 1.5 mm²
230V AC (+10%, -15%)
5 mA - 1A
3.4. Conditions of use
3.5. Electrical connection
Electrical supply V
Electrical power consumption at Qn
(without accessories) W
Electrical power consumption at Qn
(without accessories) W
Electrical power consumption in standby
mode W
Max length of sensor cables m
Power terminal output
V
A
Maximum start setting temperature °C
Safety temperature °C
Maximum service pressure hPa
(bar)
Minimum cold pressure hPa
(bar)
Nominal water flow rate m3/h
Minimal water flow rate m3/h
Water content l
Weight without water kg
Temperature of installation room (min. /
max.) °C
Relative humidity of installation room
Protection level
Maximum altitude of installation m
MODELS
40 kW 60 kW 80 kW 100 kW 120 kW
85
105
4000
(4)
1000
(1)
1,7 2,4 3,4 4,1 5,1
1,4 1,9 2,7 3,3 4,1
3,6 5 9 10,2 12,8
50 60 90 95 100
5 / 45
between 5% and 95%
IP24D
2000
18.03.2016 Page 17 / 130

Page 18 / 130 00RNO0182-#
4. INSTALLATION
4.1. Installing the boiler
VARFREE boilers must not be mounted on a wall
covered with an inflammable material: plastic,
wood, etc.
The combustion air must be free of agents
containing chlorine, ammonia, fluorine and
alkaline. These compounds are found in aerosols,
paints, cleaning products, washing powder,
detergents, glue, snow-clearing salt, etc.
Do draw in the air that is evacuated from places
where these products are used - swimming pools,
laundries, hair dressing salons, cold rooms -
as one or more of these compounds could be
introduced into the combustion air.
Recommended distances relative to walls:
Sufficient clearances must be provided to permit
easy maintenance operations on the boilers. The
minimum values (in mm) are indicated in the
diagram opposite and table below:
These values cannot be substituted for the
specific regulatory requirements.
B23 / B23P C13 C33 C53
40 kW and
60 kW 80 kW to 120 kW 40 kW and 60 kW
80 kW to
120 kW
40 kW
and 60
kW
80 kW to
120 kW
40 kW and
60 kW
80 kW to
120 kW
ø80 ø125 ø110 ø125 ø160 ø80/125 ø100/150 ø80/125 ø100/150 ø80/80 ø100/100
H* (mm) 280 360 310 430 450 290 350 140 170 510 570
*The minimum value of H corresponds to the spare required to install the
exhaust system accessories. It takes account of the dimensions of the
87° angle of a horizontal duct, independently of the length and gradient
of the latter.
!IMPORTANT:
The boiler must be positioned horizontally using a spirit level to
promote effective ventilation of the boiler body (use the roof as a
reference surface).
!IMPORTANT: The front and side jackets are held in place by clips. Remove the
jackets before handling the boiler (risk of falling).
figure 4 - Clearances
!IMPORTANT: The boiler must not bear the weight of the accessories and connections
(hydraulics, gas, exhaust system, etc.).
Hmin. 1780
min. 800
min.
250
U0561516-#

18.03.2016 Page 19 / 130
4.2. Removing / installing the front panels
Pull the bottom of the panel forwards to release.
Pull the top of the panel forwards to release.
Remove the panel.
Do the opposite to install the panel.
figure 5 - Removing the trim doors


U0561516-#


4.3. Exhaust connection
You must comply with the regulatory texts and rules of the art that apply in
the country where the boiler will be installed.
The exhaust extraction ducts must be made in a material resistant to the
condensate that can form when the boiler is operating. These materials
must also be capable of supporting flue gas temperatures up to 120°C.
One exhaust temperature sensor guarantees the protection of the type
B and C combustion product evacuation ducts.
VARFREE boilers are approved to be connected to:
• a B23 or B23P flue
• a C13, C33 or C53 suction pipe
!IMPORTANT: The boiler must not be made to support the exhaust duct's weight.

Page 20 / 130 00RNO0182-#
4.3.1. Connection to a B23 chimney
B23 type connection:
Air from the installation premises, gas evacuation through the roof via a
natural draft pipe.
!IMPORTANT:
Check that the boiler installation premises have high and low
ventilation, that it conforms to current regulations and that it is not
obstructed.
For the VARFREE 40 kW and 60 kW, the use of the ø125 Chimney Adaptor
accessory (code 040940) is mandatory to connect the boiler to a B23 chimney
duct. This kit is suitable for Ø 125 external ducts.
For the VARFREE 80 kW to 120 kW, the use of the ø160 Chimney Adaptor
accessory (code 041050) is mandatory to connect the boiler to a B23 chimney
duct. This kit is suitable for Ø 160 external ducts.
!IMPORTANT:
Under no circumstances is use of these mandatory accessories a
substitute for checking the dimensioning of the chimney ducts (given
a combustion gas pressure at the boiler outlet equal to 0 Pa).
VARFREE boilers are high performance boilers with very low exhaust
temperatures; consequently to retain a favourable draft the ducts must run
upwards from the boiler outlet.
Horizontal duct runs must be avoided so as to limit condensate retention. To
do this use a minimum slope of 3 % towards the boiler in the horizontal parts.
!WARNING: If several boilers are connected to one flue, check by calculation that
the flue is not pressurised when all the boilers are operating at Qn.
øduct VARFREE Accessory
part number Min. A (mm) A (mm)
ø125 40 kW and 60 kW 040940 2090 310
ø160 80 kW to 120 kW 041050 2170 390

18.03.2016 Page 21 / 130
A
B
figure 6 - Sizing recommendations
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U0561516-#
4.3.2. Connection to a B23P chimney
B23P type connection:
Air from the installation premises, gas evacuation through the roof via a
pressurised duct.
!IMPORTANT:
The use of the “Chimney Adaptor” accessory is mandatory to connect
a VARFREE boiler to a B23 chimney duct. The table below represents
the accessories available for each boiler type.
!IMPORTANT:
Check that the boiler installation premises have high and low
ventilation, that it conforms to current regulations and that it is not
obstructed.
Filtering cloth
A indicates the minimum upper position of
the chimney adapter when fully inserted
relative to the ground.
B indicates the height of the of the chimney
adapter when fully inserted relative to the
upper panel of the boiler.

Page 22 / 130 00RNO0182-#
!IMPORTANT:
The combustion product extraction duct must be dimensioned by
using the parameters set out in the table in chapter 3.3.
Depending on the actual configuration of the duct, a calculation is
required to check that the pressures at the boiler outlet at Qmin, Qall
and Qn do not exceed the maximum allowable values in this table.
Values corresponding to the 50/30°C regime are to be used for this
calculation.
øduct VARFREE Accessory part number Min. A (mm) A (mm)
ø80 40 kW and 60 kW 040945
(contains part ) * 2000 220
ø110 80 kW to 120 kW 041052
(contains part ) * 2040 260
ø125
40 kW and 60 kW 040940
(contains parts +) * 2090 310
80 kW to 120 kW 041051
(contains parts +) * 2155 375
ø160 80 kW to 120 kW 041050
(contains parts +) * 2170 390
* : See figure 6.
!IMPORTANT: For this type of configuration, it is imperative to use an exhaust
system with technical evaluation document (ducts under pressure)
The 80 Chimney Adaptor accessory (code 040945) has an Ø80, 500 mm
long straight component that can be cut to the desired dimension (195 mm
min).
The Ø 110 (code 041052), Ø 125 (codes 040940 and 041051) and Ø 160
(code 041050) chimney adapter have an outlet that cannot be cut.
A purge tee is not necessary, because condensate recovery is incorporated
in the boiler. To do this use a minimum slope of 3 % towards the boiler in the
horizontal parts.
To ease fitting coat the joints with liquid soap or an appropriate grease.
!IMPORTANT:
If several boilers are connected to the same flue, check the following
by calculation:
• One boiler at Qmin and the others at Qmax: The outlet pressure
of the boiler at Qmin must be lower than the permissible pressure
specified in the table in Chapter 3.3.
• One boiler at Qall and the others at Qmax: The outlet pressure of
the boiler at Qmin must be lower than the permissible pressure
specified in the table in Chapter 3.3.
• All the boilers at Qmax: The outlet pressure of the four boilers must
be lower than the permissible pressure specified in the table in
Chapter 3.3.