Toyotomi Toyoset NS-2800, Руководство по обслуживанию

Страница: 8 / 47

8
1-13. Forced Flue Vented System
The combustion air system channels air to and from the heater. Outside air is drawn into
the heater by the combustion blower through the flue pipe and is blown into the bottom
of the burner. It then combines with the vaporized fuel and ignites.
As the heated air passes through the heat exchanger, a blower fan blows air past the
heat exchanger and out again into the room from the heated air outlet.
1-14. Flue Pipe
The flue pipe assembly is a
“
pipe-within-a-pipe
”
design which consists of two concentric
tubes. Outside air is drawn through the cylindrical space between the tubes. Combustion
by-products are vented through the inner tube. As cool air enters the flue pipe, it is
heated by the hot air that is exiting the system.
1-15. Blower Motor Assembly
The blower motor assembly on the cabin heater is a dual function fan with the intake air
and circulation fans mounted on a common shaft. One side is the intake air fan and the
other is the circulation fan. The intake fan draws in outside air through the flue pipe for
internal combustion. The cabin heater blower motor has a two-stage speed fan. The
larger diameter intake fan keeps the air pressure within combustion system lower than
the room air. The operation modes control the fan speeds and the solenoid fuel pump.
The blower motor will keep running for 120 seconds after turning off the heater to
exhaust vapor gas in the system and cool down the unit.
1-16. Heat Exchanger
The exhaust vapors pass through the heat exchanger and are pushed out through the
flue pipe by the pressure generated by the blower motor. While exhaust vapors are
moving through the heat exchanger, the heat is forced to be conducted to the circulation
air by the air circulation fan.
1-17. Fuel Delivery System
Fuel is pumped up from the external fuel storage tank or the removable fuel tank to the
burner.
The solenoid fuel pump meters the flow of fuel to the burner through a copper fuel line.