MHS Boilers ADI LT User manual

L338 11/2011
INSTALLATION, OPERATION AND
MAINTENANCE MANUAL
ADI LT
LOW TEMPERATURE
BOILER

L338 11/2011
2
I
IN ND DE EX X
1. INTRODUCTION_________________________________________________________________________________ 4
2. REGULATIONS _________________________________________________________________________________ 5
3. EEC APPROVALS AND CERTIFICATIONS ___________________________________________________________ 5
4. BOILER GENERAL VIEW: DESCRIPTION OF THE COMPONENTS________________________________________ 6
5. DIMENSIONS ___________________________________________________________________________________ 8
6. TECHNICAL DATA RANGE ADI LT ________________________________________________________________ 10
6.1 Models ADI LT 105 to ADI LT 400_________________________________________________________________ 10
ADI LT 105 to ADI LT 475: modulating power from 30% _________________________________________________ 10
6.2 Models ADI LT 475 to ADI LT 950_________________________________________________________________ 11
ADI LT 475: modulating power from 30% _____________________________________________________________ 11
ADI LT 550 to ADI LT 950: modulating power from 40% _________________________________________________ 11
7. BOILER HEAT EXCHANGER _____________________________________________________________________ 12
8. POWER MODULATION AND COMBUSTION SYSTEM _________________________________________________ 13
8.1 ASSEMBLY OF GAS CONNECTION –AIR-GAS INLET _______________________________________________ 14
8.2 AIR INLET FILTER_____________________________________________________________________________ 16
9. BURNER______________________________________________________________________________________ 16
9.1 IGNITION AND IONISATION KIT__________________________________________________________________ 16
10. CONTROL PANEL - SIEMENS __________________________________________________________________ 17
10.1 DISPLAY____________________________________________________________________________________ 18
10.2 STANDARD OR INITIAL DISPLAY _______________________________________________________________ 18
10.3 ADJUSTMENT OF THE SET-UP BOILER FLOW TEMPERATURE ______________________________________ 18
10.4 BOILER LOCKOUT CODE______________________________________________________________________ 19
10.5 FUNCTION BOILER MAINTENANCE _____________________________________________________________ 19
10.6 AVAILABLE PARAMETERS THAT CAN BE ADJUSTED BY THE FINAL USER ___________________________ 20
11. DATA AND INFORMATION VISUALIZED ON THE DISPLAY - SIEMENS__________________________________ 21
11.1 AVAILABLE INFORMATION ____________________________________________________________________ 21
11.1.2 Available readings at Maintenance level 1_______________________________________________________ 21
11.1.3 Available readings at Maintenance Level 2 ______________________________________________________ 22
11.1.4 Available readings at Maintenance Level 3 ______________________________________________________ 22
11.2 CODES OF THE BOILER OPERATION PHASES____________________________________________________ 22
11.3 ERROR CODES VISUALIZED ON THE DISPLAY ___________________________________________________ 23
11.4 OPTIONAL: FLOW TEMPERATURE FUNCTION OF OUTSIDE TEMPERATURE __________________________ 23
11.5 VIEW OF THE BOILER CONTROL UNIT _________________________________________________________ 23
11.6 REGULATION OF SEVERAL BOILERS ___________________________________________________________ 24
11.6.1 Boilers simple sequence _____________________________________________________________________ 24
11.6.2 External control unit with signals 0…10 V to regulate the start-up and modulation of each boiler. ________ 24
11.6.3 External control unit regulating and optimizing all the boilers’combined operation. ____________________ 25
11.6.4. Remote Control or telecomputing ________________________________________ Error! Bookmark not defined.
12. ELECTRIC DRAWINGS _________________________________________________________________________ 28
12.1 ELECTRIC DRAWING ADI LT 105 - ADI LT 200 __________________________________________________ 29
12.2 ELECTRIC DRAWING ADI LT 250 - ADI LT 325 ___________________________________________________ 30
12.3 ELECTRIC DRAWING ADI LT 400 - ADI LT 750 __________________________________________________ 31

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13. SAFETIES____________________________________________________________________________________ 32
14. BOILERS IDENTIFICATION LABEL _______________________________________________________________ 32
15. INSTALLATION _______________________________________________________________________________ 33
15.1 BOILERS HEAT OUTPUT ______________________________________________________________________ 33
15.2 LIFTING AND TRANSPORTING THE BOILERS BY A CRANE _________________________________________ 33
15.3 BOILERS ROOM _____________________________________________________________________________ 33
15.4 GAS SUPPLY________________________________________________________________________________ 34
15.4.1. Gas pressure higher than 45 mbar.____________________________________________________________ 34
15.5 DRAINING OF THE BOILER CONDENSED PRODUCTS______________________________________________ 35
15.5.1. Water condensing__________________________________________________________________________ 35
15.5.2. Neutralization treatment of the condensed products. _____________________________________________ 35
15.5.3. Evacuation piping of condensed products. _____________________________________________________ 35
15.5.4. Boiler chimney_____________________________________________________________________________ 35
15.6 CHIMNEYS __________________________________________________________________________________ 36
15.6.1. Chimney sizing ____________________________________________________________________________ 36
15.6.2. Flue draught stabilizer ______________________________________________________________________ 37
15.6.3. Old installation ____________________________________________________________________________ 37
15.7 HYDRAULIC INSTALLATION ___________________________________________________________________ 38
15.7.1 Data to be considered _______________________________________________________________________ 38
15.7.2 Overpressure safety valve____________________________________________________________________ 38
15.7.3 Hydraulic pressure drop _____________________________________________________________________ 39
15.7.4 Water manifold _____________________________________________________________________________ 40
15.7.5 Water quality of the installation _______________________________________________________________ 41
15.7.6 System drawings ___________________________________________________________________________ 42
16.1 BEFORE THE START-UP ______________________________________________________________________ 46
AIR AND GAS PRESSURE SWITCH: _________________________________________________________________ 46
16.2 THE BOILER CONTROL UNIT AND OPERATING CYCLE ____________________________________________ 47
16.3 GAS - AIR ADJUSTMENTS _____________________________________________________________________ 48
16.3.1 Combustion adjustment _____________________________________________________________________ 48
16.3.2 Change of fuel: from Propane gas to Natural gas_________________________________________________ 50
17. MAINTENANCE _______________________________________________________________________________ 50
17.1 PROCEDURE TO DISMANTLE THE BURNER______________________________________________________ 50
17.2 POSITION OF PROBES AND SENSORS _________________________________________________________ 52
17.2 COMBUSTION DATA__________________________________________________________________________ 53
18. BOILER GUARANTEE__________________________________________________________________________ 54
19. APPENDIX I: LIST OF ERROR CODES ____________________________________________________________ 56
Data indicated in the present manual are liable to changes.
MHS Boilers has the right to make modifications without notice of any product of its range.
No company, person or entity external to MHS Boilers can modify this document.

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1. INTRODUCTION
The global trend, European and international, aims at improving energetic efficiency both in buildings and
generators, in order to reduce pollutant emissions in the atmosphere (directive SAVE, KYOTO agreement)
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.
MHS Boilers specialise in the manufacturing of gas boilers with high efficiency performances and reduced pollutant
emissions (“clean combustion”), has developed an innovating and revolutionary product contributing to a
technological evolution in the field of water boilers for centralized installations: the ADI LT boiler.
The main characteristics of the ADI LT 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.S.), in accordance with anti-legionella regulations.
-EEC Approval by CERTIGAZ, with 3 performance stars for its high energetic efficiency (according to the
European directive 92/42/EEC).
-Efficiency up to 105%.
-Boiler certified as “Low temperature”: flow temperature up to 90ºC, no limit of return temperature.
-Boiler heat exchanger in stainless steel.
-Power outputs from 104 to 905 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
models).
-Burner power modulation by varying the premix air-gas flow by means of a motor fan of variable speed.
-Reduced electric consumptions per year thanks to the motor fan of variable speed 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 regulation and control adaptable to all systems available on the market:
The boiler can operate by means of its own regulation.
It can be connected to a sequence control unit in an installation with several boilers.
It can be connected to Building Manage System (B.M.S.).
It can be connected to telecomputing.
-Reduced dimensions and weight:
Boiler heat exchanger ADI LT 475 (440 kW of output) Large: 81 cm, Long: 94 cm, Weight: 490 kg
Easy installation in boiler rooms of difficult access.
Installation in terraces (reinforcement of the structure is not required).
Space saving in boiler room (464 kW in less than 0,76 m2).

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2. REGULATIONS
The installation must be designed and realized 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 realized 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
ADISA boilers, model ADI LT, are certified as follows:
MODEL
ADI LT
105 to 400
475 to 750
850 to 950
GAS BOILERS
DIR. 90/396/EEC
1312CL5485
(AND EFFICIENCY DIR.
92/42/EEC)
1312CL5488
-----
The European Directive of Boilers Efficiency, dir. 92/42/EEC, 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
Multiblock gas valve
J
Boiler control unit and power modulation
L
Hot water flow
M
Hot water return
N
Flues outlet
P
Gas connection
Q
Air pressure switch
R
Air filter
S
Ignition transformer
T
Gas pressure switch
U
Pressure sensor
V
Air purgers (manual)
Models ADI LT 105 to 200 (view from above):
(B)
(D)
(F)
(E)
(C)
(S)
(Q)
(H)
(P)
(T)
(U)
(L)
(M)
(V)
(V)

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Models ADI LT 250 and higher:
(A)
(C)
(D)
(B)
(J)
(Q)
(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
Model
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
105
350
185
82,5
150
1110
774
198
915
595
510
66
62
151,5
130
450
185
112,5
150
1110
774
198
963
595
510
66
62
134,3
150
450
185
112,5
150
1110
774
198
963
615
530
66
62
134,3
200
450
185
112,5
150
1110
774
198
963
635
546
66
62
134,3
250
660
305
177,5
175
1583
937
403
1156
940
775
61
75
217,3
275
660
305
177,5
175
1583
937
403
1156
940
775
61
75
217,3
325
810
360
225
250
1583
936
445
1156
940
775
61
75
292
400
810
360
225
250
1583
936
445
1190
940
775
61
75
249,3
475
810
360
225
250
1583
936
445
1190
940
775
61
75
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 the present document are liable to changes without prior warning.
(L)
(C)
(B)
(A)
(D)
L1 L2
12 9b 9a
AL
AA
F
7
4
6
5
A
LF
LA
GL
HF HA HG
H
SB
ADI LT
250 - 475
ADI LT 105
ADI LT 130- 150-200

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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.
A
H
HG
HA
F
9b
L1
L2LF
12
HF
SB
8
9a
AA
LA GL
4
6
AL
5
Model
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
550
1040
380
320
350
1583
1026
443
1341
940
775
63
69
359
650
1040
380
320
350
1583
1026
443
1341
940
775
63
69
359
750
1040
400
320
350
1583
1022
443
1365
940
775
63
69
360
850
1040
400
330
350
1583
1022
443
1365
1160
995
93
---
360
950
1040
400
330
350
1583
1022
443
1365
1160
995
93
---
360
(*) 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 LT
4-5
6
9
12
Diam.
Diam.
Diam.
Diam.
105
2", threaded
3/4"
¾”
½” H
130
2", threaded
1"
¾”
½” H
150
2", threaded
1"
¾”
½” H
200
2", threaded
1"
¾”
½” H
250
2 ½", to be flanged (PN 6)
1"1/4
1”1/2
½” M
275
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
400
2 ½", to be flanged (PN 6)
1"1/4
1”1/2
½” M
475
2 ½", to be flanged (PN 6)
1"1/4
1”1/2
½” M
550
3", to be flanged (PN 6)
1"1/4
1”1/2
½”M
650
3", to be flanged (PN 6)
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
ADI LT 550 - 950
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 LT
6.1 Models ADI LT 105 to ADI LT 400
CONCEPT
Units
105
130
150
200
250
275
325
400
Power output
Maximum power
(average water
temp: 70ºC)
kW
104
130
149,3
190
230
262
322
380
Power output
Minimum power
(average water
temp: 40ºC)
kW
34,4
43,3
49,3
62,8
76,0
84,8
104,9
124,4
Power input
Maximum
kW
109,6
138,0
157,2
200,0
242,3
270,0
334,0
396,0
Minimum
kW
32,9
41,4
47,2
60,0
72,7
81,0
100,2
118,8
Natural Gas
Gas flow Max.
m3/h
10,2
12,8
14,6
18,6
22,5
25,1
31,0
36,8
(G20)
Flues flow
m3/h
238
300
341
434
550
614
759
899
Flues Residual
Press.
Pa
18,9
64,8
90
67,5
54
70,8
90
90
Boiler weight without water
kg
110
110
112
123
139
330
350
440
Water capacity
litros
30
30
30
33
36
76
85
99
Max. water pressure
bar
5
5
5
5
5
5
5
5
Water
ΔT = 10ºC
m3/h
8,9
11,2
12,8
16,3
19,8
22,5
27,7
32,7
flow
ΔT = 12ºC
m3/h
7,5
9,3
10,7
13,6
16,5
18,8
23,1
27,2
rate
ΔT = 15ºC
m3/h
6,0
7,5
8,6
10,9
13,2
15,0
18,5
21,8
Electric
Consumption
at max. output
W
134
182
222
129
201
177
342
445
at min. Output
W
24
31
41
26
36
22
60
79
Maximum
consumption
W
255
268
282
256
314
259
342
445
Supply
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 )
Propane gas = CONSULT
Electric supply to the boiler: 230 V, 50 Hz, single-phase and Earth.
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 LT 105 to ADI LT 475: 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 LT 475 to ADI LT 950
CONCEPT
Units
475
550
650
750
850
950
Power output
Maximum power
(average water
temp: 70ºC)
kW
464
545
616
695
800
905
Power output
Minimum power
(average water
temp: 40ºC)
kW
151,8
236,7
266,8
299,3
346,9
392,9
Power input
Maximum
kW
483,3
563,6
638,3
720,2
829,0
942,7
Minimum
kW
145,0
225,4
255,3
288,1
331,6
377,1
Natural Gas
Gas flow Max.
m3/h
44,9
52,4
59,3
67,0
77,1
87,6
(G20)
Flues flow
m3/h
1098
1170
1321
1491
1771
2014
Flues Residual
Press.
Pa
90
180
132
108
Boiler weight without water
kg
490
490
500
500
500
585
Water capacity
litros
118
112
160
160
160
188
Max. water pressure
bar
5
5
5
5
5
5
Water
ΔT = 10ºC
m3/h
39,9
46,9
53,0
59,8
68,8
77,8
flow
ΔT = 12ºC
m3/h
33,3
39,1
44,1
49,8
57,3
64,9
rate
ΔT = 15ºC
m3/h
26,6
31,2
35,3
39,8
45,9
51,9
Electric
Consumption at
max. output
W
727
668
859
1165
at min. Output
W
81
86
115
124
Maximum
consumption
W
727
668
859
1165
Supply
V
1x230 V
1x230 V
1x230 V
1x230 V
3x380 V
3x380 V
Natural gas L.C.V. = 10,757 kW/m3 (38,728 MJ/m3 )
Propane gas = CONSULT
Electric supply to the boiler:
ADI LT 475 –750: 230 V, 50 Hz, single-phase and Earth.
ADI LT 1300 –950: 380 V, 50 Hz, tri-phasal, and Earth.
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 LT 475: modulating power from 30%
ADI LT 550 to ADI LT 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 (flues-water) is made of
stainless steel: 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, realized 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 purgers are installed in the higher part of
the boiler for the air venting of the boiler.
Front and rear view: models ADI LT 200 and lower
Front and rear view ADI LT 250 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
(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) Double multi-block gas valve
(7) Gas inlet (boiler gas connection to the installation)
(8) Fan for the air-gas mix
(9) Motor fan, of variable speed
(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 LT 250 and higher).
(14) Pressure connection for the safety air pressure switch
(15) Air filter (just models LT 250 and higher).
(16) Electrodes support
(17) Gasket for electrodes support.
NOTE: this is a guide diagram; according to the model, the position of the electrodes, the pilot flame, the
motor fan and of the double multi-block gas valve can vary.

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8.1 ASSEMBLY OF GAS CONNECTION –AIR-GAS INLET
The ADI LT 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 multiblock gas valve regulates the gas outlet pressure according to the pressure value in the
venturi.
Note: (13) in models LT 250 and higher: a coupling pipe between the multi-block gas valve and the venturi
measures the pressure drop before the mix. For lower models there is no pipe, the connection between the
multi-block gas valve and the venturi is internal.
M. The power modulation is realized 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.
Pa. Air pressure switch: safety of operation, in case of obstruction of the air inlet,
the motor-fan stops.
In Models ADI LT 105 to 200: these pieces form one only
global group: burner, burner-holder plate, motor-fan, venturi
and multi-block gas valve.

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Exploded view of the assembly burner –fan –gas valve for models LT 250 and higher:
Motor-Fan basculating attached
to the body of the boiler.

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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 (for
ex. in case of building work in the same room or in places next to the
ventilation ducts of the boiler room) or environments with aggressive
steams (evacuation or air outlet of industrial laundries...).
See an example of the filter in the attached photo.
Only included in models LT 250 and higher.
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 IONISATION
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 realized
by means of an ionization electrode (2).
The minimum ionization value must be
always higher than 5 microamperes.
(16) Electrodes holder plate
(17) Joint for the set.
ADI LT
Inclination (X)
105
13º
130 –200
16º
250- 750
5,5º
850 - 950
17
16
3
4
2
.
.
X

ADI LT boiler - Technical Manual Page
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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
Button for boiler reset (T1)
2
Not operational: Select D.H.W.S. circuit (T2). D.H.W.S. on/off
3
Select heating circuit 1 (T3). Change the operation mode:
Automatic mode: Circuit 1 works according to time program 1
Permanent nominal mode according to the circuit setpoint , adjustment by default.
Permanent mode according to reduced setpoint
Standby: circuit 1 disconnected, anti-freezing function activated .
4
Adjust boiler set-up flow temperature (T4)
5
Not operational: Adjust D.H.W .S. set-up temperature
6
Button to change the line of the display that you want to select
(T6) to go down, (T7) to go up.
7
8
To modify the values of adjustment of the parameters on the display,
To decrease (T8), and to increase (T9)
9
10
Access to the available information
11
Display of data and operation modes
12
Function maintenance, stop controller (press simultaneously switches 4 and 5)
To go to the initial display, press T2
(A)
(11)
(A) Boiler on/off switch (11) Display: readings, messages, errors...

ADI LT boiler - Technical Manual Page
L338 11/2011
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10.1 DISPLAY
10.2 STANDARD OR INITIAL DISPLAY
10.3 ADJUSTMENT OF THE SET-UP BOILER FLOW TEMPERATURE
The boiler flow temperature wiil be changed according to the configuration (with or without external temperature
sensor).
1
Not available (water pressure)
2
Values
3
Maintenance, manual operation
To take measurements of the boiler flues.
Stop of the active controller
4
Not available: D.H.W.S.: temperature or D.H.W.S. actived.
Heating activated or reading of boiler set-up temperature
: reading of the outside temperature
: level of operation at a nominal set-up temperature
: level of operation at a reduced set-up temperature
: flame
: failure
5
Time of day, adjustments of parameters or error code
6
Heating circuit operation mode:
Automatic, according to the time program at a nominal
set-up temperature or at a reduced set-up temperature.
: operation at a nominal set-up temperature all the time.
: operation at a reduced set-up temperature all the time.
: boiler in standby / waiting.
7
Not available: D.H.W.S. operation mode
8
Time programming of use of the heating circuit
1
Operation mode for heating
2
Not available (D.H.W.S. mode)
3
Level of operation of the heating circuit
4
Time of day
5
Real value of the boiler flow temperature
6
Not available
7
State of the flame
8
Time bar
9
Boiler operation mode
Meaning
Press the button T4 of flow temperature to adjust the set-up
temperature of the heating circuit
Increase the set-up value by pressing T9, or decrease it by
pressing T8
Press the button T2 to save the changes and go back to the
initial display.

ADI LT boiler - Technical Manual Page
L338 11/2011
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10.4 BOILER LOCKOUT CODE
To detect the type of error, see the list of “Error codes visualized on the display” described in the paragraph 11.3 of
the present document.
Once solved the cause of the lockout, reset the boiler by pressing the button T1 during more than half a second,
.
To go back to the initial display, press the button T2 .
10.5 FUNCTION BOILER MAINTENANCE
If you are on the main display (if not, press the button T3), press T10, “info”
Press simultaneously the buttons T4 and T5 during more than 6 seconds,
and then press both again,
On the right of the display a pointer will flicker pointing to
The display will show the percentage (%) of power at which the boiler is working.
In order to realize the maintenance operations, the action PID of the controller on the boiler will be deactivated. The
boiler power can be increased or decreased, by pressing one of the buttons T8 or T9
If you wish to go directly to the maximum power (on the display: 100%) or to the minimum power (on the display:
0%), you can press T7 or T6
To get out of the mode maintenance, press T2 .
Meaning
In case of boiler lockout, a glittering error code appears on the
display (see example: E 151)
Press key T2 and then press key info, T10, to get access to the
error subcode (see example: 238)

ADI LT boiler - Technical Manual Page
L338 11/2011
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10.6 AVAILABLE PARAMETERS THAT CAN BE ADJUSTED BY THE FINAL USER
Press the button T6 or T7 , to accede directly to the programming level “final user”.
Select the required line by pressing the buttons T6 and T7, , the display will show “Pxxx”
Adjust the required value by pressing the buttons T8 and T9, .
The adjusted value will be saved when changing line.
Press the button T2 to get out of the programming level. Changes won’t be saved.
Press the button T10 to get out of the programming level. Changes will be saved.
If nothing changes after 8 minutes or any other button has been pressed, you will come back to the initial display
and changes won’t be saved.
If you go to another level or line, changes will be automatically saved.
Line
Function
Adjustment
range
Unit
Resolution
Value by
default
1
Current time
0 ... 23:59
h / min
1 min
---
5
Boiler reduced set-up temperature
TRN
ºC
0.5
69.0
Time
programming
11
Time program Heating circuit 1: phase 1, start-up time
00:00... 24:00
hh:mm
10 min
06:00
12
Time program Heating circuit 1: phase 1, stop time
00:00... 24:00
hh:mm
10 min
22:00
13
Time program Heating circuit 1: phase 2, start-up time
00:00... 24:00
hh:mm
10 min
24:00
14
Time program Heating circuit 1: phase 2, stop time
00:00... 24:00
hh:mm
10 min
24:00
15
Time program Heating circuit 1: phase 3, start-up time
00:00... 24:00
hh:mm
10 min
24:00
16
Time program Heating circuit 1: phase 3, stop time
00:00... 24:00
hh:mm
10 min
24:00
31-36
Not available: Time programs of D.H.W.S. circuit
00:00... 24:00
hh:mm
10 min
06:00
45
Standard time programs for heating
(press simultaneously T8 and T9, , during 3 seconds)
No / Yes
----
-----
No