32 Installing the System Piping
3.4 Filling the System
Before filling the boiler, completely unscrew and
remove the air vent cap to enable the system to fill
properly.
Note
If the air vent cap is only partially
loosened, the air vent may not allow for
the boiler to fully purge. The cap must be
completely unscrewed and removed to
complete the procedure.
Tighten the air vent cap and the vent screws when
the system is full.
Air Vent
Cap
Pressure
Relief Valve
Note
Ensure that the vent cap is re-installed
and the vent screws on the system and
boiler pumps are properly tightened
before testing or operating the system.
Figure 2. Vertical installation
Y-fitting
Содержание NFC-250/175H
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