Viessmann Vitomax HW Series Installation Instructions Manual page 9

Boiler connections
M72B
Boiler size
Boiler flow and return
Temperature spread
For permiss. operating
pressure 6 and 10 bar
For permiss. operating
pressure 16 bar
Safety valve
For permiss. operating
pressure
Tab. 9
M74B
Boiler size
Boiler flow and return
For permiss. operating pressure
6, 10 bar
Temperature spread
For permiss. operating pressure
16 bar
Temperature spread
Safety valve connector
For permiss. operating
pressure
(cont.)
40 K PN16 DN 100 100 100 125 125 125 150 150 150 200 200
30 K PN16 DN 125 125 125 125 150 150 150 200 200 200 200
20 K PN16 DN 150 150 150 150 200 200 200 200 250 250 250
40 K PN25 DN
PN40 DN 100 100 100 125 125 125 150 150 150
30 K PN25 DN
PN40 DN 125 125 125 125 150 150 150
20 K PN25 DN
PN40 DN 150 150 150 150
6 bar PN40 DN
10 bar PN40 DN
16 bar PN40 DN
40 K PN16 DN 200
30 K PN16 DN 200
20 K PN16 DN 250
40 K PN25 DN 200
30 K PN25 DN 200
20 K PN25 DN 250
6 bar PN40 DN 100
10 bar PN40 DN 65
16 bar PN40 DN 65
1 2 3 4 5
— — — — —
— — — — —
200 200 200 200 250 250 250
— — — —
—
50 50 50 65 65
40 40 40 50 50
32 32 32 40 40
1 2 3
200 200 250
250 250 250
250 300 300
200 200 250
250 250 250
250 300 350
100 100 100
80 80 80
65 65 65
6 7 8 9
— — — —
200 200 200 200
— —
— —
— — — —
65 65 80 80
50 50 65 65
40 40 50 50
4 5 6 7
250 250 300
300 300 350
350 400 400
250 250 300
300 300 350
350 400 400
125 125 150
100 100 100
80 80 80
A B C
200
250
250
200 200 200
— — —
250
— — —
250
— — —
80 100 100
65 65 80
50 65 65
8 9
300 300
350 350
400 450
300 300
350 350
400 450
150 150
125 125
100 100
9