Connections On The Heating Water And Dhw Sides - Viessmann Vitodens 100-W B1HF Series Installation And Service Instructions Manual

Mounting the boiler and making connections

Connections on the heating water and DHW sides

If the connections have not been fitted previously,
make the connections on the heating water and DHW
sides.
Gas condensing system boiler
A B C
Fig. 8 Specifications for threads in conjunction with
connection accessories
Heating flow R (male thread)
A ¾
Cylinder flow G (male thread)
B ¾
Gas connection R (male thread)
C
¾
Cylinder return G (male thread)
D
¾
Heating return R (male thread)
E ¾
Filling/draining
F
Connection on the heating water side of the DHW
cylinder:
The required intermediate pieces (Rp
thread) on the cylinder flow and return are part of the
connection set for the DHW cylinder.
If no DHW cylinder is being connected, seal off the
connections with caps.
D E F
, female
¾
(cont.)
Gas condensing combi boiler
A B C
Fig. 9 Specifications for threads in conjunction with
connection accessories
Heating flow R (male thread)
A
¾
DHW R (male thread)
B
½
Gas connection R (male thread)
C ¾
Cold water R (male thread)
D ½
Heating return R (male thread)
E ¾
Filling/draining
F
Scald protection
DHW temperatures of over 60 °C can occur with gas
condensing combi boilers. As a result, scald protection
should be installed on site in the DHW pipe.
Installation sequence
D E F
19