6
SR-plus Technical & Performance Details
(1)
Based on a maximum limit thermostat setting of 110
o
C.
(2)
Boiler efficiencies at 100% load are based on a mean operating temperature
of 70
o
C, at 30% efficiencies are based on a mean temperature of 50
o
C.
(3)
Based on gross CV 38.5 MJ/m
3
.
(4)
Based on gross CV 45.5 MJ/kg and specific gravity 0.835.
(5)
Hydraulic resistance
(mbar)
= (Flow rate
(m
3
/h)
)
2
x z
Figures are based on the maximum boiler outputs.
Type
500
600
700
900
1200
1500
• Maximum output
kW
500
600
750
1000
1250
1500
• Minimum output
kW
225
300
375
500
625
750
• Boiler input at maximum output
kW
546.45
656.50
818.77
1094.09
1366.12
1646.54
• Boiler input at minimum output
kW
240.60
322.23
401.50
534.76
667.74
803.86
• Maximum boiler operating temperature
(1)
°C
100
100
100
100
100
100
• Minimum return temperature (oil/gas)
°C
60/55
60/55
60/55
60/55
60/55
60/55
• Minimum flue gas temperature
°C
140
140
140
140
140
140
• Maximum working pressure / test pressure
bar
6/9
6/9
6/9
6/9
6/9
6/9
• Boiler efficiency net
(2)
at 100%PN
%
91.5
91.4
91.6
91.4
91.5
91.1
at 30%PN
%
93.5
93.1
93.4
93.5
93.6
93.3
• Standing losses qB at 70°C
Watt
1250
1500
1725
1800
2375
2400
• Insulation thickness
mm
100
100
100
100
100
100
• Fuel Consumption at maximum output
Nat Gas
(3)
m
3
/hr
56.35
68.07
84.90
113.45
141.66
170.73
35 seconds oil
(4)
litres/hr
55.17
66.13
77.22
99.37
137.87
166.16
• Hydraulic resistance through the boiler
(5)
z-factor
0.020
0.020
0.010
0.011
0.011
0.009
• Hydraulic resistance with 11 K T
m bar
30.55
44.00
34.36
67.20
105.00
122.31
• Hydraulic resistance with 20 K T
m bar
9.25
13.31
10.39
20.33
31.77
37.43
• Water Flow rate with
11 K T
m
3
/ h
39.08
46.90
58.62
78.16
97.71
117.25
• Water Flow rate with
20 K T
m
3
/ h
21.50
25.80
32.24
42.99
53.74
64.49
• Boiler water content
litres
800
770
1340
1250
1320
1330
• Dry Weight (without burner)
(6)
kg
1700
1754
2463
2616
3350
3650
Type
1750
2000
2250
2500
3000
3500
400
0
• Maximum output
kW
1760
2050
2350
2650
3000
3500
4150
• Minimum output
kW
880
1025
1175
1325
1500
1750
2075
• Boiler input at maximum output
kW
1931.94
2242.89
2573.93
2908.89
3285.87
3837.72
4555.43
• Boiler input at minimum output
kW
945.22
1100.97
1260.73
1418.63
1602.56
1871.66
2226.40
• Maximum boiler operating temperature
(1)
°C
100
100
100
100
100
100
100
• Minimum return temperature (oil/gas)
°C
60/55
60/55
60/55
60/55
60/55
60/55
60/55
• Minimum flue gas temperature
°C
140
140
140
140
140
140
140
• Maximum working pressure / test pressure
bar
6/9
6/9
6/9
6/9
6/9
6/9
6/9
• Boiler efficiency net
(2)
at 100%PN
%
91.1
91.4
91.3
91.1
91.3
91.2
91.1
at 30%PN
%
93.1
93.1
93.2
93.4
93.6
93.5
93.2
• Standing losses qB at 70°C
Watt
2475
2510
2530
2570
2960
3070
3160
• Insulation thickness
mm
100
100
100
100
100
100
100
• Fuel Consumption at maximum output
Nat Gas
(3)
m
3
/hr
200.33
232.58
266.90
300.97
340.35
397.51
455.30
35 seconds oil
(4)
litres/hr
194.96
226.34
259.75
276.93
330.87
387.86
443.09
• Hydraulic resistance through the boiler
(5)
z-factor
0.008
0.006
0.006
0.0015
0.0015
0.0015
0.0017
• Hydraulic resistance with 11 K T
m bar
151.40
154.06
202.45
64.36
82.48
112.96
166.19
• Hydraulic resistance with 20 K T
m bar
45.80
46.60
61.24
19.47
24.95
33.96
50.27
• Water Flow rate with
11 K T
m
3
/ h
137.57
160.24
183.69
207.14
234.49
277.57
312.66
• Water Flow rate with
20 K T
m
3
/ h
75.66
88.13
101.03
113.92
128.97
150.47
171.96
• Boiler water content
litres
2150
2690
3350
3660
3670
4020
4130
- Dry Weight (without burner)
(6)
kg
4325
4600
5400
5900
6525
8700
10850
SR-plus 1750 - 4000
(6)
Dry weights based on the 6 bar boiler. To calculate the weight of an 8 bar
version
add 30%.
SR-plus 500 - 1500
August 2014
