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Rated output
kW
11
15
18
22
29
35
42
48
60
Further connection dimensions
Internal diameter of pipe to expansion
vessel
DN
15
15
15
20
20
20
20
20
20
R
½
½
½
¾
¾
¾
¾
¾
¾
Safety valve
DN
15
15
15
15
15
15
15
15
15
R
½
½
½
½
½
½
½
½
¾
Blow-off line
DN
20
20
20
20
20
20
20
20
25
R
¾
¾
¾
¾
¾
¾
¾
¾
1
Note
If the gas supply pressure exceeds the maximum permitted value, install a separate gas pressure governor upstream of the system.
f
e
SSI
KV
KR
GA
E
d
179
316
409
554
716
173
173
250
580
457
b
a
775
877
c
78
SV
A
Subframe (accessory)
E
Drain and diaphragm expansion vessel
GA Gas connection
KR Boiler return
KV Boiler flow
SSI Draught hood
SV Safety flow
Dimensions
Rated output
kW
11
15
18
22
29
35
42
48
60
a
mm
446
446
526
526
596
706
796
886
1076
b
mm
500
500
580
580
650
760
850
940
1130
c
mm
760
760
760
760
760
780
780
780
780
d
mm
937
967
992
992
1012
1012
1012
1082
1082
e
mm
266
266
312
312
359
403
449
495
586
f
mm
234
234
268
268
291
357
401
445
544
Product information
(cont.)
VITOGAS
VIESMANN
7
5822 428 GB
1