Immergas 3.020857, Instruction Booklet And Warning

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23
INS
TALL
AT
O
R
US
ER
MAINTEN
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CE TECHNI
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AN
- The data relevant to domestic hot water per-
formance refer to a dynamic inlet pressure of
2 bar and an inlet temperature of 15°C; the
values are measured directly at the boiler outlet
considering that to obtain the data declared
mixing with cold water is necessary.
- The max. sound level emitted during boiler
operation is < 55dBA. The sound level value is
referred to semianechoic chamber tests with
boiler operating at max. heat output, with
extension of flue gas exhaust system according
to product standards.
3.20 TECHNICAL DATA.
Nominal heat input kW (kcal/h) 26.2 (22492)
** DHW minimum heat input kW (kcal/h) 8.3 (7116)
CH minimum heat input kW (kcal/h) 10.9 (9357)
Nominal heat output (useful) kW (kcal/h) 23.8 (20468)
** DHW minimum heat output (useful) kW (kcal/h) 7.0 (6020)
CH minimum heat output (useful) kW (kcal/h) 9.4 (8084)
* Efficiency at nominal heat output % 91.0
* Efficiency at 30% nominal heat output load % 89.3
Heat loss at case with burner On/Off % 2.30 / 1.20
Heat loss at flue with burner On/Off % 6.70 / 0.09
Central heating circuit max. operating pressure bar 3
Central heating circuit max. operating temperature °C 90
Adjustable central heating temperature °C 35 - 85
System expansion vessel total volume l 4.0
Expansion vessel factory-set pressure bar 1
Water content in generator l 2.5
Total head available with 1000 l/h flow rate kPa (m H
2
O) 24,52 (2,5)
Hot water production useful heat output kW (kcal/h) 23.8 (20468)
** Domestic hot water adjustable temperature °C 10 - 60
** Min. pressure (dynamic) domestic hot water circuit bar 0.3
** Domestic hot water circuit max. working pressure bar 10
** Minimum D.H.W. flow rate l/min 1.5
Drawing capacity in continuous duty with UB Immergas (∆T 30°C) l/min 11,1
Weight of full boiler kg 28.0
Weight of empty boiler kg 25.5
Electrical connection V/Hz 230/50
Power input A 0.44
Installed electric power W 95
Pump consumption W 87
Equipment electrical system protection - IPX4D
Boiler flue circuit resistance Pa 1.3
NO
X
class - 3
Weighted NO
X
mg/kWh 139
Weighted CO mg/kWh 52
Type of appliance B11BS
Category II2H3+
- *Efficiencies refer to the lower heating value.
- ** When the boiler is connected to an external
cylinder.