Camus Hydronics Valiant-FT II Series, Installation And Service Manual

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Inlet water temperatures must not drop below 40°F to
prevent freezing.
2.4.2 Connecting to the Valiant FT
Figure 16: Valiant-FT Piping Connection
For ease of service, install unions on the inlet and outlet of
the appliance. The cold water return must be connected to
the connection
labelled “Inlet”. The hot water supply to the
building must be connected to the connection labelled
“Outlet”.
Figure 17: Valiant-FT Reverse-Return Piping
Configuration (Flow illustration)
If multiple units are installed together, piping to the units
must be arranged such that each unit has the same length
of pipe connected to it, in order to balance the flow. The
recommended configuration would be “Reverse-Return”,
where the unit closest to the incoming supply connection is
the furthest from the system supply connection. (Figure 17).
2.4.3 Low Water Cut-off (LWCO)
If this boiler is installed above radiation level, a low water
cut-off device must be installed at the time of boiler
installation. Some local codes require the installation of a
low water cut-off on all systems. Low water cut-off probes
are available as a factory supplied option on all models.
Low water cut-offs should be tested every six months.
2.4.4 High Limit
The high limit on the Valiant FT Series II is incorporated with
the outlet sensor. This limits maximum discharge water
temperature. A manual reset high limit needs to be reset on
the touchscreen, or the rest button on the control board,
which must be pushed whenever water temperature has
exceeded the set point of the high limit.
WARNING REGARDING CHILLED WATER AND
HEATING COIL SYSTEMS
When an appliance is connected to a refrigeration system
where the same water is used for heating and cooling, the
chiller must be piped in parallel with the appliance.
Appropriate isolation valves; manual or motorized must be
provided to prevent the chilled water from entering the
appliance.
The appliance piping system of a hot water boiler
connected to heating coils located in air handling units
where they may be exposed to refrigerated air circulation
must be equipped with flow control valves or other
automatic means to prevent gravity circulation of the boiler
water during the cooling cycle.
Figure 18: Chilled Water System
2.4.5 Minimum Pipe Size Requirements
The equivalent number of straight feet of pipe for each valve
and fitting in the connecting piping must be considered to
properly arrive at the total equivalent feet of straight pipe in
the field installed piping to the appliance. For water
connection sizing, see the table below:
Table 7: Valiant-FT Pipe Sizes
Model Water Connection
400
2”
500
2”
600
2”
725 2-
1/2”
850 2-
1/2”
HEAT EXCHANGER
The heat exchanger is of fully welded construction and is
cylindrical in appearance. The heat exchanger is a vertical,