NTI FTV110 - Activating Pressure Bypass Valve; Available Pump Head

Boiler and Heating System Piping │ FTV I&O Manual
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Figure 10-3 Activating Pressure Bypass Valve (FTV-Combi Only)
Figure 10-4 Available Pump Head (FTV-Combi Internal Pump)
Notes:
1
Graph depicts available pump head of FTV-Combi internal pump, after boiler internal flow losses.
Manual Bypass Valve – set to MAX (fully clockwise) to
activate the Pressure Bypass Valve – mandatory when
piping is “Direct to Zones”.