Viessmann B2TB004 - Safety Connections; Low Water Cut-Off

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Vitodens 222-F, B2TB 19, 35, 68, 125 Installation
Boiler Connections
Safety Connections
Operating pressure...................................2 bar (30 psig)
Max. allowable working pressure (MAWP)..3 bar (45 psig)
Max. boiler water temperature.....................210ºF (99ºC)
WARNING
Exposing the boiler to pressures and temperatures in
excess of those listed will result in damages, and will
render warranty null and void.
Low water cut-off
A low water cut-off may be required by local codes. Do
not install an isolation valve between boiler and low water
cut-off.
Legend
A Heating supply NPT ¾ in.
B DHW NPT ¾ in.
C Pressure relief valve discharge pipe NPT ¾ in.
D DCW NPT ¾ in.
E Heating return NPT ¾ in.
F Temperature and pressure relief valve discharge
pipe NPT ¾ in.
WARNING
Do not install an isolation valve between boiler and
pressure relief valve.
The discharge pipe for the pressure relief valve must
be oriented to prevent scalding of attendants.
Pipe pressure relief valve discharge pipe close to floor
drain. Never pipe discharge pipe to the outdoors.
Min. 6”
(Min. 152 mm)
Min. 6”
(Min. 152 mm)