Aqua-Hot™ Hydronic Heating System Owner’s Manual 07/04
Diesel-
Burner
Component
Overview
1.
Control Unit
6.
Fuel Solenoid
11.
Combustion Chamber
2.
Motor
7.
Electrode Holder
12.
Exhaust Port
3.
Ignition Coil
8.
Ignition Electrodes
13.
Flame Sensor
4.
Clutch
9.
Fuel Nozzle
14.
Fuel Pump
5.
Combustion Air Blower
10.
Heat Exchanger
15.
Fuel Ports (Supply / Return)
16.
Combustion Air Intake Port,
with Adjustable Shutter
SECTION 3: OPERATING INSTRUCTIONS
Figure 4
3.4 Diesel-Burner Component Overview
SECTION 3: OPERATING INSTRUCTIONS
Diesel-
Burner
Operational
Flow-Chart
NOTE:
If the Aqua-Hot’s coolant
temperature is
approximately 190 (+/- 5)
degrees Fahrenheit, or
higher, the
Motor (#2)
will not operate. Only
when the coolant
temperature has
dropped below 160
(+/- 5) degrees
Fahrenheit, and the
VDC
/ VAC Control
Thermostat
is calling for
heat, will the
Motor (#2)
begin to operate
.
Operation sequence once
the Aqua-Hot’s
Diesel
switch is turned
ON
.
NOTE:
The
Diesel
switch’s
Indicator Light
will
illuminate (reference
Figure 3), while the
Heating Status
and
Diesel-Burner Status
lights illuminate on the
Electronic Controller
,
reference Figure 6
.
The
Motor (#2)
, which
turns the
Combustion
Air Blower (#5)
and
drives the
Fuel Pump
(#14)
, will begin to
operate.
After approximately 10 - 25
seconds, the
Fuel
Solenoid (#6)
opens and
fuel is sprayed into the
Combustion Chamber
(#11)
through the
Fuel
Nozzle (#9)
.
Once the ignited air-fuel
mixture (FLAME) is
observed by the
Flame
Sensor (#13)
, the
Ignition
Coil (#3)
will automatically
switch
OFF
. The
combustion process now
continues to operate
unassisted.
Simultaneously the
Ignition Coil (#3)
produces a high voltage
spark across the
Ignition
Electrodes (#8),
which
ignites the incoming
air-fuel mixture
.
3.5 Diesel-Burner Operational Flow-Chart
- Reference Figure 3 for all numbers indicated in parentheses. (e.g., #8)
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