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12 | Product Description
SB625WS/SB745WS6 720 805 218 (2016/02)
Description Unit SB625WS SB745WS
160 220 290 370 480 640 800 1050 1300 1550
1 – Heating supply inch
(DN)
2 1/2
(65)
2 1/2
(65)
2 1/2
(65)
3
(80)
4
(100)
4
(100)
5
(125)
5
(125)
6
(150)
6
(150)
2 – Heating return 1
(Low Temperature)
inch
(DN)
2 1/2
(65)
2 1/2
(65)
2 1/2
(65)
3
(80)
4
(100)
4
(100)
5
(125)
5
(125)
6
(150)
6
(150)
3 – Heating return 2
(High Temperature)
inch
(DN)
2
(50)
2
(50)
2
(50)
2 1/2
(65)
3
(80)
3
(80)
3
(80)
3
(80)
4
(100)
4
(100)
4 – Safety device
fitting
inch
(DN)
1 1/4 1 1/4 1 1/4 1 1/4 1 1/2 1 1/2 3
(80)
3
(80)
3
(80)
3
(80)
5 – Boiler drain fitting Ø - inch 1111111 1/4 1 1/4 1 1/4 1 1/4
6 – Condensate drain
fitting
Ø - inch 11111 1/4 1 1/4 1 1/4 1 1/4 1 1/4 1 1/4
7 – Flue gas exhaust
fitting
Ø mm 200 200 250 250 300 300 350 350 400 450
8 – Instrument bulb/
probe sockets
n° x Ø ‘’ 3 x 1/2 3 x 1/2 3 x 1/2 3 x 1/2 3 x 1/2 3 x 1/2 3 x 1/2 3 x 1/2 3 x 1/2 3 x 1/2
A – Distance from
burner head to heating
supply
inch
(mm)
11 7/8
(302)
11 7/8
(302)
12 1/16
(306)
12 5/8
(321)
12 1/4
(311)
12 1/4
(311)
16 1/8
(410)
16 1/8
(410)
17 5/16
(440)
17 3/8
(442)
B – Distance from
heating flow outlet to
return 1
inch
(mm)
34 7/8
(885)
34 7/8
(885)
41 3/8
(1050)
48 5/16
(1235)
55 5/16
(1405)
63 3/16
(1605)
70 7/8
(1800)
80 11/16
(2050)
86 5/8
(2200)
101 3/4
(2582)
C – Distance between
heating returns 1 & 2
inch
(mm)
7 7/8
(200)
7 7/8
(200)
11 13/16
(300)
9 7/8
(250)
10 1/8
(255)
11 13/16
(300)
13 13/16
(350)
13 13/16
(350)
13 13/16
(350)
28 13/16
(732)
D – Distance between
heating return 2 and
safety device fitting
inch
(mm)
11 1/4
(285)
11 1/4
(285)
11 13/16
(300)
17 3/4
(450)
23 5/8
(600)
27 9/16
(700)
29 1/2
(750)
33 1/2
(850)
33 1/2
(850)
33 1/2
(850)
E – Distance between
heating flow outlet and
safety device fitting
inch
(mm)
15 3/4
(400)
15 3/4
(400)
17 3/4
(450)
21 1/16
(535)
21 11/16
(550)
23 13/16
(605)
27 9/16
(700)
33 1/2
(850)
39 3/8
(1000)
39 3/8
(1000)
F – Distance between
heating return 1 and
flue gas outlet
inch
(mm)
7 7/8
(200)
7 7/8
(200)
9 1/2
(242)
9 1/2
(242)
10 5/8
(270)
10 5/8
(270)
12 13/16
(325)
12 13/16
(325)
13 3/4
(350)
22 1/4
(565)
G – Height of
condensate drain
inch
(mm)
6 5/16
(160)
6 5/16
(160)
6 1/8
(155)
6 1/8
(155)
8 1/2
(215)
8 1/2
(215)
7 11/16
(195)
7 11/16
(195)
8 7/16
(215)
9 1/4
(235)
H – Height of boiler
flanges
inch
(mm)
52 3/4
(1340)
52 3/4
(1340)
57 1/16
(1450)
57 1/16
(1450)
66 3/4
(1695)
66 3/4
(1695)
75
(1905)
75
(1905)
80 5/16
(2040)
85 13/16
(2180)
I – Height of flue gas
outlet
inch
(mm)
19 7/8
(505)
19 7/8
(505)
21 1/16
(535)
21 1/16
(535)
25
(635)
25
(635)
26 3/4
(680)
26 3/4
(680)
28 3/8
(720)
31 11/16
(805)
L – Height of boiler
drain fitting
inch
(mm)
2 3/8
(60)
2 3/8
(60)
2 7/16
(61)
2 7/16
(61)
3 1/4
(82)
3 1/4
(82)
3 3/8
(86)
3 3/8
(86)
3 1/2
(90)
3 3/8
(85)
M – Boiler centerline inch
(mm)
13 9/16
(345)
13 9/16
(345)
14 9/16
(375)
14 9/16
(375)
15 9/16
(395)
15 9/16
(395)
19 5/16
(490)
19 5/16
(490)
21 1/16
(535)
22 1/4
(565)
O – Distance from
Boiler drain fitting
inch
(mm)
5 3/16
(132)
5 3/16
(132)
5 3/8
(137)
5 3/8
(137)
4 15/16
(125)
4 15/16
(125)
6 7/8
(175)
6 7/8
(175)
7 1/8
(181)
7
(178)
P – Height of heating
return 1
(Low Temperature)
inch
(mm)
53 7/8
(1370)
Table 6 Technical Data
12


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