Crown Aruba 5 Installation Manual

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5) Automatic Air Vent (Required) - At least one automatic air vent is required. Manual vents will usually be required in
other parts of the system to remove air during initial ll.
6) Low Water Cut-O (factory supplied) This boiler is equipped with a low water cut-o (LWCO) that prevents the boiler
from ring if there is inadequate water in the boiler. This LWCO is an automatic reset type, meaning that it will allow
the boiler to restart automatically if the low water condition is corrected. This LWCO satises the requirements of most
installation codes used for residential installations, however some jurisdictions may require a manual reset low water cut-
o which requires a reset button to be pushed to restart the boiler.
If a manual reset LWCO is required, it must be installed in the supply piping just above the boiler in accordance with the
LWCO manufacturer’s instructions (the factory supplied LWCO is left in place). No intervening valves may be installed
between an externally piped LWCO and the boiler. Wire on external manual reset LWCO to break 120VAC power to the
boiler.
FIGURE 8.1: STANDARD RELIEF VALVE POSITION
FIGURE 8.3: STANDARD BOILER PIPING
FIGURE 8.2: ALTERNATE RELIEF VALVE POSITION