Camus Hydronics Valiant FT VA0080, Manual

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3.4 COMBUSTION AIR BLOWER
Figure 22: Valiant FT Combustion Air Fan
The Valiant FT uses a modulating air fan to provide
combustible air/gas mix to the burner and push the products
of combustion through the heat exchanger and venting
system. The fan assembly consists of a sealed housing and
fan wheel constructed from spark resistant cast aluminum.
The fan is operated by a fully enclosed 120 VAC, Single-
Phase EC/DC electric motor. The fan housing and motor
assembly is fully sealed and SHOULD NOT be field
serviced.
3.5 BURNER
Figure 23: Valiant FT Burner
This appliance uses a single cylindrical burner installed
vertically into the combustion chamber at the top of the heat
exchanger. The burner consists of a round mounting flange
welded to a mixing tube. The flange provides the transition
from the combustion air fan into the burner. The mixing tube
is covered with a knitted alloy material that forms the burner
port surface. The burner port surface can sustain operation
from a blue flame down to infrared conditions as the burner
input varies.
There is a unique burner for each model. Burners may not
be interchanged between different input models.
3.6 SPARK IGNITER
Figure 24: Spark Igniter
The ceramic igniter is inserted directly through the fan
flange and held in place by two screws. A sealing gasket
above and below the igniter assures a good seal. The
igniter provides the spark which ignites the main burner
flame during start-up.
3.7 FLAME SENSOR
The flame sensor is inserted directly through the top plate
of the heat exchanger. Care must be taken when installing
the flame sensor to align it perpendicular to the fan flange
and parallel to the burner tube and not to over tighten.
Always remove the flame sensor prior to removing top heat
exchanger plate for inspection and maintenance of the heat
exchanger.
Figure 25: Flame Sensor
The ignition module relies on the flame sensor to provide a
flame rectification signal. Oxide deposits, improper
placement or damaged ceramic insulator will result in
insufficient signal leading to ignition module lock out. For
proper operation minimum 0.8 VDC must be fed back to the
module. Oxide deposit on the sensor rod must be removed
with steel-wool. Do not use sand-paper since this will
contaminate the surface.