SCHUSTER BWA R50, Installation And Servicing Manual

13

13

Technical Features

BWA R 50 c

BWA R 70

Appliance category

II

2H3P

II

2H3P

Modulation Ratio 

 1:5

1:7

Nominal Heat Input on P.C.I. Qn

kW

48,5

67,5

Minimum Heat Input on P.C.I. Qmin

kW

9,6

9,6

Nominal Output (Tr 60 / Tm 80 °C) Pn

kW

47,2

65,5

Minimum Output (Tr 60 / Tm 80 °C) Pn min 

kW

9,1

9,1

Nominal Output (Tr 30 / Tm 50 °C) Pcond 

kW

49,3

68,5

Minimum Output (Tr 30 / Tm 50 °C) Pcond min

kW

10,3

10,3

Efficiency at max. output (Tr 60 / Tm 80°C)

%

97,29

 97,29

Efficiency at min. output (Tr 60 / Tm 80°C) 

%

94,9

 94,9

Efficiency at max. output (Tr 30 / Tm 50°C))

%

101,62

101,51

Efficiency at min. output (Tr 30 / Tm 50°C)  

%

104,3

104,3

Rendimento al 30% del carico (Tr 30°C)

%

107,33

107,33

Number of stars (according to 92/42 EEC)

Combustion  efficiency with nominal load 

%

97,80

97,41

Combustion efficiency with minimum load

%

98,42

98,42

Heat loss at casing with burner in operation (Qmin)

%

3,61

3,61

Heat loss at casing with burner in operation (Qn)

%

0,51

0,12

Stand-by losses (with ∆t 30°C)

%

0,2

0,2

Flue gas temperature tf-ta  (min)(**) 

°C

33

33

Flue gas temperature tf-ta  (max)(**)

°C 

43,6

51,3

Flue gas mass flow rate (min)

kg/h

15,9

15,9

Flue gas mass flow rate (max)

kg/h

80,0

111,4

Excess λ air

%

26,84

20,57

(***) CO

2 

(min/max)

%

9,0- 9,2

9,5 - 9,5

Flue losses with burner in operation (min)

%

1,58

1,58

Flue losses with burner in operation (max)

%

2,20

2,59

Flue losses with burner off (depression “0”)

%

0,2

0,2

Portata d’acqua  alla potenza nominale (∆T 15°C)

l/h

2837

3927

Portata d’acqua  alla potenza nominale (∆T 20°C)

l/h

2120

2946

Minimum heating circuit pressure

bar

0,5

0,5

Maximum heating circuit pressure

bar

6

6

Max allowable pressure of the generator

bar

8

8

Water content

l

3,9

3,9

Gas Consumption Natural (20 mbar) gas G 20 a Qn

m

3

/h

5,13

7,14

Gas Consumption Natural gas (20 mbar) G 20 a Qmin

m

3

/h

1,02

1,02

Gas Consumption G25 (supply pressure 25 mbar) Qn

m

3

/h

Gas Consumption G25 (supply pressure 25 mbar) Qmin

m

3

/h

Gas Consumption G31 (supply pressure 37/50 mbar)

 Qn

kg/h

3,76

5,24

Gas Consumption G31 (supply pressure 37/50 mbar)

 Qmin

kg/h

0,75

0,75

Max. available pressure at the chimney base

Pa

40

40

Condensate production max

kg/h

7,8

10,87

Emissioni

CO at Minimum Heat Input with 0% of O2

mg/kWh

19,7

19,7

NOx at Nominal Heat Input with 0% of O2

mg/kWh

68

68

NOx at Minimum Heat Input with 0% of O2

mg/kWh

37

37

NOx Weighted value according EN 15420)

mg/kWh

33,9

34,68

NOx Class

5

5

Electrical Data

Voltage/Frequency electric power supply

V/Hz

230/50

230/50

Fuse on main supply

A (R)

4

4

Maximum absorbed output 

W

172

290

Minimum absorbed output 

W

77

145

Standby Consumption

W

16

16

Insulation degree

IP

X4D

X4D

(*)       (*) Room Temperature = 20°C
(**)     Temperatures detected with the unit in operation 

(Tr 60 / Tm 80°C)

(***)    See table INJECTORS PRESSURES





2.5 - OPERATING DATA ACCORDING TO UNI 10348  and GENERAL FEATUREs

For the adjustment data: NOZZLES - PRESSURE - DIAGRAMS - FLOW RATES - CONSUMPTION refer to the paragraph ADAP

-

TATION TO OTHER TYPES OF GAS.