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Technical information
Type
(110)
(125)
• Nominal heat output at 80/60 °C
kW
110
125
• Heat output range (heating oil EL, natural gas H: variant 1 and 3)
kW
70-110
70-125
• Heat output range (heating oil EL, natural gas H: variant 2)
kW
50-110
50-125
• Maximum heat input
kW
118.3
135.8
• Maximum boiler operating temperature
1
°C
90
90
• Safety temperature limiter setting (water side)
1
°C
110
110
• Operating/test pressure at max. operating temperature 90 °C
1
bar
4.0/ 5.2
4.0/ 5.2
• Maximum boiler operating temperature
2
°C
105
105
• Safety temperature limiter setting (water side)
2
°C
120
120
• Operating pressure at max. operating temperature 105 °C
2
bar
3.0
3.0
• Minimum boiler operating temperature
°C
see table of operating conditions (below)
• Minimum boiler return temperature
°C
see table of operating conditions (below)
• Minimum flue gas temperature at boiler
°C
see table of operating conditions (below)
• Regulator set for 170 °C flue gas temperature
3R5+2R3
3R5+2R3
• Boiler efficiency at full load and 80/60 °C
(related to lower/upper calorific value (heating oil EL))
%
92.7/ 87.6
92.8/ 87.6
• Boiler efficiency at partial load 30 % and return 37 °C
(acc. to EN 303) (related to lower/upper calorific value (heating oil EL))
94.8 /87.6
92.8 /87.6
• Standard efficiency at 75/60 °C (DIN 4702 Part 8)
(related to lower/upper calorific value (heating oil EL))
%
95.9/ 90.5
95.8/ 90.4
• Standby losses qB at 70 °C
Watts
400
400
• Resistance on the heating gas side at nominal output
180 °C flue gas temperature, 12.5 % CO
2
, 500 m above sea level
(tolerance ±20 %)
mbar
0.89
1.10
• Flue gas mass flow at nominal output 12.5 % CO
2
heating oil
kg/h
188
222
• Maximum flue draught
Pa
20
20
• Flow resistance boiler
3
z-value
0.2
0.2
• Hydraulic resistance at 10K
mbar
17.90
24.80
• Hydraulic resistance at 20K
mbar
4.47
5.80
• Water flow rate at 10K
m³/h
9.46
11.10
• Water flow rate at 20K
m³/h
4.73
5.40
• Boiler water content
litres
250
250
• Boiler gas content
m³
0.1848
0.1848
• Insulation thickness of boiler body
mm
80
80
• Weight (incl. casing)
kg
391
391
• Sound level
4
- Heating noise without absorber hood (EN 15036 Part 1)
dB(A)
79
80
- Heating noise with absorber hood (EN 15036 Part 1)
dB(A)
67
67
- Flue gas noise inside the flue (EN 15036 Part 2)
dB(A)
91
91
- Flue gas noise radiated from the mouth (DIN 45635 Part 47)
dB(A)
84
84
• Combustion chamber dimensions Ø-inside x length
mm
ø440x974
ø440x974
• Combustion chamber volume
m³
0.148
0.148
• Dimensions
see Dimensions
• Maximum depression in flue gas system (boiler connection)
Pa
30
30
1
Controller U3.1 and T2.2
2
Controller U3.2 and T0.2, operating pressure may be increased to 4 or 5 bar in countries in which the Pressure Equipment Directive is not in force.
3
Flow resistance boiler in mbar = flow rate (m³/h)
2
x z
4
Information applies to combinations with Hoval-tested oil burner
3.3 Technical data Uno-3 (110,125) for all other countries
Fuel
Heating oil EL
Natural gas H
Option 1
Option 2
Option 3
Option 1
Option 2
Option 3
min. flue gas temperature
°C
130
110
130
130
110
130
min. boiler temperature
°C
48
50
52
58
60
62
min. return temperature
°C
35
38
No lower limit
45
48
No lower limit
Return temperature controls
yes
yes
no
yes
yes
no
Boiler start-up protection
1
no
no
yes
no
no
yes
1
If the boiler temperature is or drops below the minimum boiler temperature (variant 3) and there is no return maintenance then the load must
be switched off using a corresponding control function.
Possible operating conditions
