U.S. Boiler Company MPO - IQ, Инструкция по эксплуатации

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5. See Figure 14 for suggested near boiler piping of
Option Card Controls.
WARNING
The use of a low water cut-off device, while not
required unless radiation level is below the boiler,
is highly recommended.
If a low water cut-off is required, it must be mounted in
the supply piping above the boiler (see Figure 14). The
minimum safe water level of a hot water boiler is just
above the highest water containing cavity of the boiler;
that is, a hot water boiler must be full of water to operate
safely.
Figure 14: Near Boiler Piping
IV. WATER BOILER PIPING (continued)
It is recommended that the LWCO control is installed
above the boiler to provide the highest level of protection.
However, where the LWCO control is approved by the
LWCO control manufacturer for installation in a high
boiler tapping of a water boiler, the use of the listed LWCO
control is permitted when it is installed according to the
LWCO manufacturer's instructions.
6. If it is required to perform a long term pressure test of
the hydronic system , the boiler should first be isolated
to avoid a pressure loss due to the escape of air trapped
must first be removed from the boiler.
To perform a long term pressure test including the boiler,
ALL trapped air must first be removed from the boiler.
A loss of pressure during such a test, with no visible water
leakage, is an indication that the boiler contained trapped
air.