elco ADI CD 70 Installation and operation manual

ADI-Nox CD Boiler
With LMS Controls
Models 70 to 950
Operating & Maintenance Manual
ELCO Heating Solutions Ltd
3 Juniper West
Fenton Way
Southfields Business Park
Basildon
Essex
SS15 6SJ
Tel: [phone]
Fax: [phone]
www.elco.co.uk
L348

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I
IN ND DE EX X
1. INTRODUCTION ______________________________________________________________________________________________ 4
2. REGULATIONS________________________________________________________________________________________________ 7
3. EEC APPROVALS AND CERTIFICATIONS____________________________________________________________________________ 7
4. BOILER GENERAL VIEW: DESCRIPTION OF THE COMPONENTS _________________________________________________________ 8
5. DIMENSIONS________________________________________________________________________________________________ 10
6. TECHNICAL DATA RANGE ADI CD _______________________________________________________________________________ 12
6.1 Models ADI CD 70 to ADI CD 375 ______________________________________________________________________________ 12
6.2 Models ADI CD 450 to ADI CD 950 _____________________________________________________________________________ 13
7. BOILER HEAT EXCHANGER _____________________________________________________________________________________ 14
8. POWER MODULATION AND COMBUSTION SYSTEM ________________________________________________________________ 15
8.1 Assembly of gas connection –air/gas inlet ______________________________________________________________________ 16
8.2 Air inlet filter ______________________________________________________________________________________________ 17
8.2.1 Optional air filter for ADI little size ___________________________________________________________________________ 18
9. BURNER____________________________________________________________________________________________________ 19
9.1 Ignition and ionization kit ____________________________________________________________________________________ 19
10. CONTROL PANEL - SIEMENS___________________________________________________________________________________ 20
10.1 Display___________________________________________________________________________________________________ 21
10.2 Programming _____________________________________________________________________________________________ 24
10.3 Available parameters at enduser level _________________________________________________________________________ 27
10.4 Boiler lockout code ________________________________________________________________________________________ 28
10.5 Function boiler maintenance_________________________________________________________________________________ 28
10.6 Data and information visualized on the display _________________________________________________________________ 28
11. CONTROL OF SEVERAL BOILERS –CASCADED SYSTEM _____________________________________________________________ 29
11.1 Boilers sequence included ___________________________________________________________________________________ 29
11.2 External control signal 0…10 V to regulate start-up and power modulation of each boiler_______________________________ 34
11.3 Remote Control or telecomputing ______________________________________________________Error! Bookmark not defined.
12. ELECTRIC DRAWING _________________________________________________________________________________________ 36
12.1 Electric drawing ADI CD 70 –850 (single-phase motor) ___________________________________________________________ 37
12.2 Electric drawing ADI CD 950 (three-phase motor) ________________________________________________________________ 38
12.3 Cover of Siemens electronical board __________________________________________________________________________ 39
12.4 Cable entry points _________________________________________________________________________________________ 39
13. HEATING CIRCUITS __________________________________________________________________________________________ 39
13. HEATING CIRCUITS __________________________________________________________________________________________ 40
13.1 Heating circuits basic parameters _____________________________________________________________________________ 42
13.2 Professional installer parameters _____________________________________________________________________________ 42
14. DOMESTIC HOT WATER ______________________________________________________________________________________ 48
14.1 Basic parameters __________________________________________________________________________________________ 49
14.2 Professional installator parameters ___________________________________________________________________________ 50
15. SAFETIES __________________________________________________________________________________________________ 52
16. BOILERS IDENTIFICATION LABEL _______________________________________________________________________________ 52
17. INSTALLATION _____________________________________________________________________________________________ 53
17.1 Boilers heat output ________________________________________________________________________________________ 53

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I
IN ND DE EX X ( (C Co on nt t) )
17.2 Lifting and transporting the boilers by a crane __________________________________________________________________ 53
17.3 Boilers room ______________________________________________________________________________________________ 53
17.4 Gas supply________________________________________________________________________________________________ 54
17.4.1 Gas pressure higher than 45 mbar___________________________________________________________________________ 54
17.5 Draining of the boiler condensate ____________________________________________________________________________ 55
17.5.1 Water condensing ________________________________________________________________________________________ 55
17.5.2 Condensate neutralization treatment ________________________________________________________________________ 55
17.5.3 Condensate drainage _____________________________________________________________________________________ 55
17.5.4 Boiler chimney___________________________________________________________________________________________ 55
17.6 Chimneys ________________________________________________________________________________________________ 56
17.6.1 Chimney sizing___________________________________________________________________________________________ 56
17.6.2 Flue draught stabilizer ____________________________________________________________________________________ 57
17.6.3 Old installation __________________________________________________________________________________________ 57
17.6.4 Adjustable flue damper at the boiler flue outlet _______________________________________________________________ 58
17.7 Hydraulic installation _______________________________________________________________________________________ 59
17.7.1 Data to be considered_____________________________________________________________________________________ 59
17.7.2 Overpressure safety valve _________________________________________________________________________________ 59
17.7.3 Hydraulic pressure drop ___________________________________________________________________________________ 60
17.7.4 Water manifold __________________________________________________________________________________________ 61
17.7.5 Water quality of the installation ____________________________________________________________________________ 62
17.7.6 System drawings _________________________________________________________________________________________ 63
18. THE BOILER START-UP _______________________________________________________________________________________ 67
18.1 Before the start-up_________________________________________________________________________________________ 67
18.2 Gas pressure switch ________________________________________________________________________________________ 67
18.3 The boiler control unit and operating cycle _____________________________________________________________________ 68
18.4 Gas/air adjustments________________________________________________________________________________________ 69
18.4.1 Combustion adjustment ___________________________________________________________________________________ 69
18.4.2 Change of fuel: from Propane gas to Natural gas _______________________________________________________________ 71
19. MAINTENANCE _____________________________________________________________________________________________ 71
19.1 Procedure to dismantle the burner ___________________________________________________________________________ 71
19.2 Position of probes and sensors ______________________________________________________________________________ 73
19.3 Combustion data __________________________________________________________________________________________ 74
20. BOILER GUARANTEE_________________________________________________________________________________________ 75
21. APPENDIX I: LIST OF ERROR CODES_____________________________________________________________________________ 77
Please note that this manual is liable to changes and alterations or withdrawal without prior notice
ELCO Heating Solutions Ltd reserve the right to make modifications without notice and any changes made are
not necessarily retrospective to older models.
No company, person or entity external to ELCO Heating Solutions Ltd can modify this document.

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1. INTRODUCTION
The global trend, European and international, aims at improving energy efficiency both in buildings and generators,
in order to reduce pollutant emissions in the atmosphere (SAVE directive, treaty of KYOTO).
Carbon dioxide (CO2) is one of the greenhouse gases that remain the longest in the atmosphere. In accordance
with IEO2007, predicted CO2 emissions will be 33.9 billon tons in 2015 and 42.9 in 2030.
This is why the European campaign known as “20-20-20 in 2020” has been created, with the aim, among others, of
cutting carbon dioxide emissions by 20% by 2020.
The main characteristics of the ADI CD boiler are:
- Maximum efficiency in every kind of installations at any working temperatures.
Renovation of installations with traditional heat radiators
New installations of very Low Temperature (heating floor, fan-coils, A.H.U., etc.)
Domestic Hot Water (D.H.W.), in accordance with anti-legionella regulations.
-EEC Approval by CERTIGAZ, with 4 performance stars for its high energy efficiency (according to the European
directive 92/42/EEC).
-Seasonal efficiency up to 108%.
-Boiler certified as “Condensing”: flow temperature up to 90ºC, no limit of return temperature.
-Boiler heat exchanger in stainless steel.
-Power outputs from 68 to 892 kW.
-Maximum efficiency per year :
Variable temperature on boiler.
Boiler power modulation according to the demands of the installation.
High reduction of stop/start cycles.
Minimum heat losses due to convection/radiation through the boiler.
Inconsiderable heat losses through the chimney when the boiler is not operating.
-Gas boilers with modulating burner starting from 30% of power (depending on the installation conditions and on
the boiler models).
-Burner power modulation by varying the premix air-gas flow by means of a variable speed motor fan.
-Reduced electric consumptions per year thanks to the variable speed motor-fan for the air-gas inlet.
-Ecological combustion (“PREMIX” burner of innovative design).
NOx: about 10 ppm, CO: about 50 ppm (both referred to 3% O2).
-Boiler control adaptable to all systems available on the market:
The boiler can operate by means of its own control.
It can be connected to a sequence control unit in an installation with several boilers.
It can be connected to Building Management System (B.M.S.).
It can be connected to telecomputing.
-Reduced dimensions and weight:
Boiler heat exchanger ADI CD 450 (440 kW of output) Large: 81 cm, Long: 94 cm, Weight: 460 kg.
Easy installation in boilers rooms of difficult access.
Installation in terraces (reinforcement of the structure is not required).
Space saving in boilers rooms (440 kW in less than 0.76 m2).

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2. General Regulations / Application / Norms and Regulations
General regulations
This documentation contains important information, which is a base for safe and reliable installation,
commissioning and operation of the Adinox Low Temperature Boiler. All activities described in this document may
only be executed by authorized companies.
Changes to this document may be effected without prior notice. We accept no obligation to adapt previously
delivered products to incorporate such changes.
Only original spare parts may be used when replacing components on the boiler, otherwise warranty will be void.
Application
The Adinox Low Temperature Boiler may be used for heating and hot water production purposes only. The boiler
should be connected to closed systems with a maximum temperature of 100ºC (high limit temperature); maximum
set point temperature is 90ºC.
Norms and regulations
When installing and operating the boiler, all applicable norms (European and local) should be fulfilled:
• Local building regulations for installing combustion air and flue gas systems;
• Regulation for connecting the boiler to the electrical appliance;
• Regulations for connecting the boiler to the local gas network;
• Norms and regulations according to safety equipment for heating systems;
• Any additional local laws/regulations with regard to installing and operating heating systems.
− 92 / 42 / EEC Boiler efficiency directive − 90 / 396 / EEC Gas appliance directive − 73 / 23/ EEC Low voltage
directive − 89 / 336 / EEC EMC directive
− EN 656 Gas-fired central heating boilers –Type B boilers of nominal heat input exceeding 70 kW but not
exceeding 300 kW
− EN 15420 Gas-fired central heating boilers - Type C boilers of nominal heat input exceeding 70 kW, but not
exceeding 1000 kW
− EN 15417 Gas-fired central heating boilers - Specific requirements for condensing boilers with a nominal heat
input greater than 70 kW but not exceeding 1000 kW
− EN 13836 Gas fired central heating boilers - Type B boilers of nominal heat input exceeding 300 kW, but not
exceeding 1000 kW
− EN 15502-1 Gas-fired central heating boilers - Part 1: General requirements and tests
− EN 55014-1 Electromagnetic compatibility - Requirements for household appliances, electric tools and similar
apparatus Part 1: Emission
− EN 55014-2 Electromagnetic compatibility - Requirements for household appliances, electric tools and similar
apparatus Part 2: Immunity - Product family standard
− EN 61000-3-2 Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for harmonic current emissions
(equipment input current 16 A per phase)
− EN 61000-3-3 Electromagnetic compatibility (EMC) - Part 3-3: Limitation of voltage changes, voltage fluctuations
and flicker in public low-voltage supply systems, for equipment with rated current 16 A per phase and not subject to
conditional connection
− EN 60335-1 Household and similar electrical appliances -Safety - Part 1: General requirements
− EN 50165 Household and similar electrical appliances -Safety - Part 2-102: Particular requirements for gas, oil
and solid-fuel burning appliances having electrical connections
The following Codes of Practice are also applicable: -
BS 6644 : 2011 Specification for gas fired hot water boilers of rated inputs between 70kW (net) and 1.8MW (net)
(2nd and 3rd family gases).
BS 6880:1988 Code of Practice for low temperature hot water heating systems of output greater than 45kW. Parts
1, 2 & 3.
BS 6891:2005 + A2:2008 Specification for installation of low-pressure gas pipework of up to 35mm (R11/4) in
domestic premises (2nd family gases).
BS 7593:2006 Code of Practice for treatment of water in domestic hot water central heating systems.
BS 7671:2008 Requirements for electrical installations. IEE Wiring Regulations. Seventeenth Edition
BS EN 12828 2003 Heating systems in buildings –Design for water based heating systems.
CISBE Guide reference sections B7, B11 and B13.
CP342 Part 2: 1974 Code of Practice for centralized hot water supply.
IGE/UP/1 or 1A Gas Tightness Testing & Purging of Commercial Industrial Gas Installations
IGE/UP/2 Gas installation pipework, boosters and compressors on Industrial and Commercial premises.
IGE/UP/4 Commissioning of gas fired plant on industrial and commercial premises.
IG/UP/10 edition 3 Installation of gas appliances in Industrial and Commercial premises.

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Part 1: Flued appliances.
Through their unique construction, the Adinox Low Temperature Boiler range of central heating units are renowned
for their:
- High thermal output
- Environmental-friendliness (they meet the most stringent environmental conditions)
- Low weight and compact size
- Durability
- Low noise level
- Broad control range
- Can be supplied in a wide range of models
Through active and market oriented research, ELCO Heating Solutions Ltd is in a position to offer solutions for the
most challenging heating requirements.
The Supplier
ELCO Heating Solutions Ltd are proud to supply and technically support the Adinox Low Temperature Boiler Range
of boilers throughout the United Kingdom. For advice or more information please contact your local sales
representative or our head office via 01268 546700. or via our website www.elco.co.uk
This Document
The present documentation has been prepared with the following target groups in mind:
-The technical consultant
-The installer
-The maintenance technician
The User
ELCO Heating Solutions Ltd has opted to make the technical documentation as comprehensive as possible in the
form of this book, in order to ensure that these target groups have all the information they need. As the supplier we
would be happy to help you in connection with any additional information that you may require. This document
covers the following aspects relating to the boilers:
-General description
-Technical specifications
-Requirements for design and installation
-Maintenance instructions
-The operating instructions for the user have been affixed to the appliance itself.
Service
For commissioning and assistance in maintenance matters, please contact the Technical Services Department via
01268 546772
General restrictions
ELCO Heating Solutions Ltd products should always be used, installed and maintained in accordance with the
statutory requirements, specifications and standards applicable to these installations. All the data, information and
suggestions concerning its products provided by ELCO Heating Solutions Ltd are based on careful study. However,
the use, installation and operation of the same are outside the control of ELCO Heating Solutions Ltd and neither
ELCO Heating Solutions Ltd nor any other organisations associated with it, accept any liability for the same.

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2. REGULATIONS
The installation must be designed and made by qualified professionals in accordance with the current regulations
referring to gas, air venting, flues evacuation, electricity, safeties, fire prevention, etc.
The boiler maintenance must be made following the instructions of the manufacturer’s technical manual and with a
minimum regularity as indicated by the current regulations.
3. EEC APPROVALS AND CERTIFICATIONS
ADI-Nox boilers, model ADI CD, are certified as follows:
MODEL
ADI CD
70 to 375
450 to 750
850 to 950
GAS BOILERS
DIR. 90/396/EEC
1312CL5483
(AND EFFICIENCY DIR.
92/42/EEC)
1312CL5489
1312BQ4284
The European Directive of Boilers Efficiency, dir. 92/42/EEC, is only applied to boilers from 4 to 400 kW.

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4. BOILER GENERAL VIEW: DESCRIPTION OF THE COMPONENTS
A
Boiler heat exchanger (higher collector)
B
Flanges (boiler heat exchanger –burner –air/gas fan)
C
Ignition-ionization kit
D
Flame indicator
E
Motor fan (variable speed)
F
Fan
G
Venturi for air inlet and mix with gas
H
Gas shut-off valve
J
Boiler control unit and power modulation
L
Hot water flow
M
Hot water return
N
Flues outlet
P
Gas connection
R
Air filter
S
Ignition transformer
T
Gas pressure switch
U
Pressure sensor
V
Air vents (manual)
Models ADI CD 70 to 175 (view from above):
(B)
(D)
(F)
(E)
(C)
(S)
(H)
(P)
(T)
(U)
(L)
(M)
(V)
(V)

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Models ADI CD 200 and higher:
(A)
(C)
(D)
(B)
(J)
(H)
(G)
(F)
(E)
(R)
(S)

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5. DIMENSIONS
129b 9a
8
7
129b 9a
8
7
AA
4
6
5
AA
45
6
LA
FF
AL
LF
L2
L1
AL
GL GL
245 205
HF HA HG
SB
H
HF HAHG H
SB
A
ADI
CD
A
AA
AL
F (7)
H
HA
HF
HG
L1
L2
LA
LF
GL
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
70
350
185
82.5
150
1110
774
208
915
595
510
66
121
151.5
85
350
185
82.5
150
1110
774
208
915
615
510
66
121
151.5
105
350
185
82.5
150
1110
774
208
915
635
510
66
121
151.5
120
450
185
112.5
150
1110
774
198
963
635
530
66
121
134.3
175
450
185
112.5
150
1110
774
198
963
655
570
66
121
134.3
200
660
305
177.5
175
1583
937
403
1156
940
775
61
134
217.3
250
660
305
177.5
175
1583
937
403
1156
940
775
61
134
217.3
325
810
360
225
250
1583
936
445
1156
940
775
61
134
292
375
810
360
225
250
1583
936
445
1190
940
775
61
134
249.3
450
810
360
225
250
1583
936
445
1190
940
775
61
134
249.3
Attention: Heights H, HG, HA, HF, without taking into consideration the increase due to the silent-block feet
supplied with the boiler (dimension “SB”).
Note: data in this document are liable to changes without prior warning.
L1 L2
12 9b 9a
AL
AA
F
7
4
6
5
A
LF
LA
GL
HF HA HG
H
SB
ADI CD
200 - 450
ADI CD 70 - 105
ADI CD 120 - 175

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Gas connection: the installation company must install a female 3-pieces coupling, for an easier dismantling and
maintenance of the boiler.
Add gas filter.
ADI CD 550 - 950
L1
L2
A
AA
9b
9a
LF
8
SB
7
12
HF
F
HA
HG
H
4 5
6
LA GL AL
ADI
CD
A
AA
AL
F (7)
H
HF
HA
HG
L1
L2
LA
LF
GL
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
mm
550
1040
400
320
350
1628
487
1060
1396
940
775
82
140
360
650
1040
400
320
350
1628
487
1060
1396
940
775
82
140
360
750
1040
400
320
350
1628
487
1060
1396
940
775
82
140
360
850
1040
400
320
350
1658
487
1063
1393
1083
918
60
122
359
950
1040
400
320
350
1658
487
1063
1393
1083
918
60
122
359
Attention: Heights H, HG, HA, HF, without taking into consideration the increase due to the silent-block feet
supplied with the boiler (dimension “SB”).
Note: data in the present document are liable to changes without prior warning.
ADI CD
4-5
6
9
12
Diam.
Diam.
Diam.
Diam.
70
2", threaded
3/4"
3/4"
½” F
85
2", threaded
1"
3/4"
½” F
105
2", threaded
1"
3/4"
½” F
120
2", threaded
1"
3/4"
½” F
175
2”, threaded
1"
3/4"
½” F
200
2 ½", to be flanged (PN 6)
1"1/4
1”1/2
½” M
250
2 ½", to be flanged (PN 6)
1"1/4
1”1/2
½” M
325
2 ½", to be flanged (PN 6)
1"1/4
1”1/2
½” M
375
2 ½", to be flanged (PN 6)
1"1/4
1”1/2
½” M
450
2 ½", to be flanged (PN 6)
1"1/4
1”1/2
½” M
550
4", to be flanged (PN 10)
1"1/4
1”1/2
½” M
650
4", to be flanged (PN 10)
1"1/4
1”1/2
½” M
750
4", to be flanged (PN 10)
1"1/4
1”1/2
½” M
850
4", to be flanged (PN 10)
1"1/4
1”1/2
½” M
950
4", to be flanged (PN 10)
1"1/4
1”1/2
½” M
Legend
Concept
4
Hot water flow
5
Hot water return
6
Gas connection (female)
7
F
Flues outlet (connection to
chimney)
8
Anti-vibration supports
9
Boiler water draining (female-
threaded sleeve)
12
Draining of condensed products
(female or male-threaded sleeve)
13
Control panel

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6. TECHNICAL DATA RANGE ADI CD
6.1 Models ADI CD 70 to ADI CD 375
CONCEPT
Units
70
85
105
120
175
200
250
325
375
Power output
Maximum power
(average water
temp: 70ºC)
kW
68
85
104
120
161.8
197.5
241
294
354
Power output
Maximum power
(average water
temp: 40ºC)
kW
68.7
86.1
105.6
121.3
163.4
204.5
244.7
302.6
358.7
Power output
Minimum power
(average water
temp: 40ºC)
kW
22
27.5
34
39
52.3
63.1
77.4
94.4
113.6
Power input
Maximum
kW
69.99
87.7
107
123
166
202.2
246.5
300.5
361.2
Minimum
kW
21
26.3
32
37
49.8
60.7
74
90.2
108.4
Natural Gas
Gas flow Max.
m3/h
6.5
8.2
10
11.5
15.4
18.8
22.9
27.9
33.6
(G20)
Flues flow
m3/h
152
190
233
269
377
459
560
683
821
Flues Residual
Press.
Pa
43.2
37.8
90
64.8
54
60
81
90
64.8
Boiler weight without water
kg
110
116
120
135
138
330
350
440
445
Water capacity
litres
30
33
34
34
35
86
90
112
118
Max. water pressure
bar
5
5
5
5
5
5
5
5
5
Water
ΔT = 10ºC
m3/h
5.8
7.3
8.9
10.3
13.9
17
20.7
25.3
30.4
flow
ΔT = 12ºC
m3/h
4.9
6.1
7.5
8.6
11.6
14.2
17.3
21.1
25.4
rate
ΔT = 15ºC
m3/h
3.9
4.9
6
6.9
9.3
11.3
13.8
16.9
20.3
Electric
consumption
At max. output
W
47.8
64.6
134
93.3
95.2
131.6
167.4
267.9
435
At min. output
W
16.7
17.9
23.9
19.1
19.5
31.1
40.7
64.6
69
Maximum
consumption
W
236.5
239.9
254.9
245
249.9
260.7
274.1
308.9
435
Supply
V
1x230 V
1x230 V
1x230 V
1x230 V
1x230 V
1x230 V
1x230 V
1x230 V
1x230 V
Natural gas L.C.V. = 10.757 kW/m3 (38.728 MJ/m3). Natural gas pressure: min. 15 mbar / max. 45 mbar.
Propane gas = CONSULT
Electric supply to the boiler: 230 V, 50 Hz, single-phase and ground.
The electric protection of each boiler must be prepared considering the maximum value between the
electric consumption at the start-up and the electric consumption at the maximum power output.
ADI CD 70 to ADI CD 375: modulating power from 30%.
Note: data in the present document are liable to changes without prior warning.

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6.2 Models ADI CD 450 to ADI CD 950
CONCEPT
Units
450
550
650
750
850
950
Power output
Maximum power
(average water
temp: 70ºC)
kW
440
530
598
675
792.7
892.3
Power output
Maximum power
(average water
temp: 40ºC)
kW
443.5
535.5
605
682.4
802.1
904.1
Power output
Minimum power
(average water
temp: 40ºC)
kW
141
173.8
195.2
220.1
256.1
380.9
Power input
Maximum
kW
448
546
618
700
818.5
924.5
Minimum
kW
134
163.9
185.4
210
245.5
369.8
Natural Gas
Gas flow Max.
m3/h
41.7
50.8
57.5
65.1
76.1
85.9
(G20)
Flues flow
m3/h
1018
1170
1321
1491
1775
2007
Flues Residual
Press.
Pa
90
72
75
78
177.5
266.2
Boiler weight without water
kg
460
480
485
485
545
545
Water capacity
litres
118
120
120
120
164
164
Max. water pressure
bar
5
5
5
5
5
5
Water
ΔT = 10ºC
m3/h
37.8
45.6
51.4
58.1
68.2
76.7
flow
ΔT = 12ºC
m3/h
31.5
38
42.9
48.4
56.8
64
rate
ΔT = 15ºC
m3/h
25.2
30.4
34.3
38.7
45.5
51.2
Electric
Consumption
At max. output
W
767.8
627.4
830
1139
1175
1800
At min. output
W
124.4
83
82.8
108.4
116
320
Maximum
consumption
W
767.8
627.4
830
1139
1175
1800
Supply
V
1x230 V
1x230 V
1x230 V
1x230 V
1 x 230 V
3 x 380 V
Natural gas L.C.V. = 10.757 kW/m3 (38.728 MJ/m3). Natural gas pressure: min. 15 mbar / max. 45 mbar.
Propane gas = CONSULT
Electric supply to the boiler:
ADI CD 450 –850: 230 V, 50 Hz, single-phase and ground.
ADI CD 950: 380 V, 50 Hz, three-phase and ground.
ADI CD electric current
Maximum power
Minimum power (40%)
ADI CD 950
2.74 amp
0.35 amp
The electric protection of each boiler must be prepared considering the maximum value between the
electric consumption at the start-up and the electric consumption at the maximum power output.
ADI CD 450 to 850: modulating power from 30%.
ADI CD 950: modulating power from 40%.
Note: data in the present document are liable to changes without prior warning.

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7. BOILER HEAT EXCHANGER
The boiler heat exchanger (where takes place the heat
transfer from flues to water) is made of stainless steel: it is
a stainless steel enriched with a special alloy (for a better
resistance to corrosion and to high temperatures).
The boiler heat exchanger consists of 2 water collectors,
an upper one and a lower one, connected by means of
multiple vertical tubes forming the combustion chamber.
The vertical tubes generate a big heat transfer surface that
uses the sensible heat of the flues.
During the manufacturing process, the boiler is subjected
to a strict quality control, carried out through a process of
three leak tests: one with penetrant liquids, another one
with air pressure and the last one with water pressure.
The boiler heat exchanger is insulated.
Several manual vents are installed in the higher part of the
boiler for the air venting of the boiler.
Front and rear view: models ADI CD 175 and lower Front and rear view: models ADI CD 200 and higher

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8. POWER MODULATION AND COMBUSTION SYSTEM
12
11
7
15
1
5
13
15
5
11
14 67
3
2
8
9
4
10
NOTE: this is a guide diagram; according to the model, the position of electrodes, pilot flame, motor fan and gas
shut-off valve can vary.
Gas filter in models ADI 850 and 950:
In these models, the gas filter is supplied dismantled inside the boiler, for an
easier and safer transport.
It must be assembled once the boiler is in the plant.
The minimum gas pressure gauge is connected to the gas filter inlet.
In order to rotate the motor-fan group and take off the burner, you have to
remove first the gas filter and then proceed according to the instructions
indicated on the corresponding paragraph.
(1) Burner of fire resisting alloy mesh
(2) Ionization electrode (checking the flame
presence)
(3) Ignition electrode
(4) Pilot flame
(5) Venturi for the air-gas mix
(6) Gas shut-off valve
(7) Gas inlet (boiler gas connection to the
installation)
(8) Fan for the air-gas mix
(9) Variable speed motor-fan
(10) Air inlet
(11) Flange of the group motor-fan, to be coupled
to the flange of the boiler heat exchanger
(12) Ignition-ionization kit
(13) Pressure connection for the gas valve (just
models CD 200 and higher)
(15) Air filter (just models CD 200 and higher)

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8.1 Assembly of gas connection –air/gas inlet
The ADI CD boiler includes an air-gas premix system of modulating combustion, composed of:
1
B
8-9
2
66b 6a 7
15
Pa
5
13 Pg
10
V. Venturi operating as an air-gas mixer, ensuring combustion with a constant proportion of air/gas to the
premix burner, throughout its power modulation range.
The venturi produces a depression and drives the gas (G) towards the gas valve outlet (VV).
It operates as an additional safety: if there is no air inlet, there will be no gas admission.
VV. The gas shut-off valve controls the gas outlet pressure according to the pressure value in the venturi.
Note: (13) in models CD 200 and higher, a coupling pipe between the gas shut-off valve and the venturi
measures the pressure drop before the mix. For lower models there is no pipe, the connection between the gas
shut-off valve and the venturi is internal.
M. The power modulation is made by varying the fan speed, which also produces a variation of the
air-gas mix flow entering into the burner (B).
Pg. Minimum inlet pressure switch: adjusted at 15 mbar.
In Models ADI CD 70 to 250,these pieces form one only
global group: burner, burner-holder plate, motor-fan, venturi
and gas shut-off valve.

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Exploded view of the burner –fan –gas valve assembly for models CD 325 and higher:
Motor-fan rotating forward (ADI
CD 325 to 750) or backward (ADI
CD 850 and 950).

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8.2 Air inlet filter
The air inlet to the venturi is protected by a filter retaining the dust that is usually in
the atmosphere.
Attention: it is important to avoid excessively dusty or dirty environments (Eg. in case
of building work in the same room or in places next to the ventilation ducts of the
boilers room) or environments with aggressive steam (evacuation or air outlet of
industrial laundries...).
See an example of the filter in the attached photo.
Only included in models ADI CD 200 and higher.
8.2.1 Optional air filter for ADI little size
Optional air filter for ADI CD 120 to 175:
General view not assembled to boiler View assembled to the boiler (from above)
View of the lower part of the filter once assembled to the boiler
Optional air filter for ADI CD 70 to 105:

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9. BURNER
The boiler includes an air-gas premix burner of innovative design and material:
Fire resisting alloy mesh.
Homogeneous and stable combustion in case of any change in the power demand.
High mechanic resistance and high resistance to high temperatures.
Very low thermal inertia fast cooling (for an easier maintenance).
Fast answer to the changes of the power demand.
Thanks to its structure and design, noise produced by the combustion is very low and without resonance.
The cylindrical shape of the burner allows the flame to be homogeneously distributed. It is vertically introduced in
the boiler.
The boiler incorporates an ionization flame control. The minimum ionization value must always be superior to 5
microamperes.
9.1 Ignition and ionization kit
The ignition is electronic by means of an
electric transformer that produces a train
of sparks on the ignition electrode (3),
with the special feature that the sparks
fly from the electrode to the mass included
in this electrode, and not on the burner.
The safety of flame presence is controlled
by means of a ionization electrode (2).
The minimum ionization value must be
always higher than 5 microamperes.
Flame may be checked through the
glass spy (4).
(16) Electrodes holder plate
(17) Gasket for the set.
ADI CD
Inclination
(X)
ELECTRODE/PROBE
Length (mm)
70 –250
9º
340
325 –450
5.5º
550 - 950
7º
380
17
16
3
4
2
.
.
X

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10. CONTROL PANEL - SIEMENS
The boiler control panel is placed in the upper part of the boiler front.
ITEM
CONCEPT
1
RESET
Button for boiler reset when pressing > 0,5 s.
2
D.H.W. on/off
3
7471z49/0109
Select heating circuit mode. Change the operation mode:
Automatic mode: Circuit works according to the time program
Continuous operation according to Comfort setpoint
Continuous operation according to Reduced setpoint
Standby: circuit is disconnected, Frost Protection function activated
4
7471z54/0109
Available information is displayed by pressing the Info button
7
4
7
1
4
7
e
/
0
2
0
9
Selection of heating operation mode
Display of information
Confirmation of setting
Chimney sweep function
safety limit thermostat test
Quitting the setting
Manual Operation
RESET
Selection of DHW heating mode
(A)
(A) Boiler on/off switch (B) Display: readings, messages, errors...