Owner`s manual

Hydro-Hot Hydronic Heating System Shop Manual 07/03
R
Page 10
The Fuel Pump builds up pressure
against the Fuel Solenoid.
After
approximately 10 - 25 seconds, the Fuel
Solenoid opens and fuel is released into
the Fuel Nozzle and then sprayed into the
Combustion Chamber
.
Fuel Pump
Fuel Solenoid
Fuel Nozzle
Combustion
Chamber
The particular component begins to operate.
The component is currently operating.
Diesel-Burner Operation
The following sequence illustrates how the Hydro-Hot’s Diesel-Burner operates once it is
activated.
Also, if you are experiencing malfunctions with your Diesel-Burner, use this
sequence of operating events as a diagnostic tool to determine at what point, in the
Diesel-Burner’s operation, does the malfunction occu
r. Use the "KEY" provided below to
understand each symbol shown.
1
2
Diesel Fuel
(Supply and Return)
Motor
Combustion
Air Blower
Combustion
Air
NOTE: The Motor and Combustion
Air Blower will begin to operate
only if the VDC /
VAC Control
Thermostat is closed and calling
for heat, reference Figure 3.
Combustion
Air
Diesel Fuel Spray
Exhaust Gases
When the Diesel switch is turned ON, the Motor
and Combustion
Air Blower begin to operate. This
process is referred to as the prime-cycle
.
KEY
Section 5: Diesel-Burner
5.3 Operational Sequence
Operational
Sequence