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Product Description
SB625WS/SB745WS
6 720 805 218 (2013/02)
2.9.2
Technical Data
Description
SB625WS
SB745WS
160
220
290
370
480
640
800
1050
1300
1550
Fuel
Gas
Gas
Gas
Gas
Gas
Gas
Gas
Gas
Gas
Gas
Rated input (Nat. Gas)
MBH
(kW)
563
(164.9)
788
(230.9)
1014
(297.1)
1314
(385.0)
1689
(494.9)
2200
(644.7)
3003
(880.0)
3754
(1100.0)
4692
(1375.0)
5443
(1595.0)
Rated input (#2 Oil)
GPH
(LPH)
4.0
(15.1)
5.6
(21.2)
7.2
(27.3)
9.3
(35.2)
12.0
(45.4)
15.7
(59.4)
21.4
(81.0)
26.8
(101.4)
33.5
(126.8)
38.8
(146.9)
Gross output
MBH
(kW)
544
(159.7)
762
(223.6)
990
(290.2)
1280
(375.2)
1642
(481.5)
2190
(642.0)
2738
(802.4)
3650
(1070.0)
4563
(1337.4)
5293
(1551.4)
Sensible losses from
stack
%
1.7
1.7
1.5
1.5
1.9
1.9
1.9
1.9
1.9
1.9
Jacket losses with burner
mounted
%
0.3
0.3
0.5
0.6
0.6
0.6
0.6
0.6
0.6
0.6
Flue gas temperature
(
T)
°F
( °C)
< 113 - 167
(< 45 - 75)
< 113 - 167
(< 45 - 75)
< 113 - 167
(< 45 - 75)
< 113 - 167
(< 45 - 75)
< 113 - 167
(< 45 - 75)
Flue gas mass flow rate
1
lbs/sec
(kg/
sec)
0.15
(0.07)
0.19
(0.09)
0.26
(0.12)
0.33
(0.15)
0.44
(0.20)
0.57
(0.26)
0.72
(0.33)
0.94
(0.43)
1.19
(0.54)
1.38
(0.63)
Fireside pressure drop
2
Inch
W.C
(mbar)
0.802
(2.0)
1.083
(2.7)
1.284
(3.2)
1.846
(4.6)
2.007
(5.0)
2.208
(5.5)
2.288
(5.7)
2.529
(6.3)
2.729
(6.8)
2.970
(7.4)
Firebox volume
Ft3
(dm3)
6.07
(172)
6.07
(172)
8.51
(241)
9.85
(279)
15.61
(442)
17.51
(496)
26.59
(753)
30.15
(854)
36.62
(1037)
44.10
(1249)
Total volume of flue gas
side
Ft3
(dm3)
8.93
(253)
9.78
(277)
14.58
(413)
17.02
(482)
26.03
(737)
30.37
(860)
45.55
(1290)
51.34
(1454)
62.25
(1763)
74.05
(2097)
Heat exchanger surface
area
Ft2
(m2)
65.65
(6.1)
94.72
(8.8)
139.93
(13.0)
175.45
(16.3)
234.65
(21.8)
310.00
(28.8)
426.25
(39.6)
500.52
(46.5)
604.93
(56.2)
670.37
(62.2)
Specific heat load
MBH/
ft2
(kw/
m2)
8.28
(26.18)
8.04
(25.40)
7.07
(22.32)
7.29
(23.01)
6.99
(22.08)
7.06
(22.29)
6.42
(20.26)
7.29
(23.01)
7.54
(23.79)
7.89
(24.94)
Maximum condensate
production
Gal/h
(l/h)
4.86
(18.4)
7.23
(27.4)
8.42
(31.9)
10.80
(40.9)
13.78
(52.2)
19.49
(73.8)
23.24
(88.0)
29.42
(111.4)
35.05
(132.7)
42.13
(159.5)
Maximum working
pressure
PSI
(bar)
80
(5.5)
80
(5.5)
80
(5.5)
80
(5.5)
80
(5.5)
80
(5.5)
80
(5.5)
80
(5.5)
80
(5.5)
80
(5.5)
Maximum admissible
temperature
°F
( °C)
230
(110)
230
(110)
230
(110)
230
(110)
230
(110)
230
(110)
230
(110)
230
(110)
230
(110)
230
(110)
Maximum working
temperature
°F
( °C)
210
(98.8)
210
(98.8)
210
(98.8)
210
(98.8)
210
(98.8)
210
(98.8)
210
(98.8)
210
(98.8)
210
(98.8)
210
(98.8)
Pressure drop
T
50 °F (10 °C)
Ft. Hd.
(mbar)
5.0
(150.1)
3.3
(100.4)
4.1
(121.5)
4.3
(128.7)
1.0
(30.2)
1.1
(33.8)
1.5
(46.4)
1.8
(54.0)
1.2
(36.0)
1.4
(43.2)
Pressure drop
T
68 °F (20 °C)
Ft. Hd.
(mbar)
1.2
(36.3)
0.9
(28.4)
1.0
(30.6)
0.9
(28.7)
0.3
(8.5)
0.3
(9.0)
0.4
(13.4)
0.5
(16.3)
0.3
(10.2)
0.4
(11.3)
Water capacity
Gal
(l)
85.3
(323)
95.1
(360)
130.7
(495)
146.6
(555)
196.2
(743)
203.4
(770)
348.7
(1320)
368.5
(1395)
482.1
(1825)
501.9
(1900)
Table 5 Technical Data
1. Depends on return temperature 86-140 °F (30-60 °C)
2. At maximum output with water temps supply/return of 176/140 °F (80/60 °C) and CO2 = 9.7 %
Summary of Contents for Buderus SB625WS
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