Dettson ODH53-F, Инструкция по эксплуатации

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3- OPERATION
3.1- MANUAL OPERATION SWITCHES
Figure 2: Controls
3.2- SEQUENCE OF OPERATION
3.2.1- Sequence of operation - Beckett AFII
Side-wall venting
1. On the Beckett AFII burner, the T-T terminals have to be jumpered
on the primary control of the burner;
2. Normally open contact (W-R) on SPDT relay closed when
thermostat calls for heat;
3. Burner motor starts and spark is established. The burner motor fan
pre-purges the combustion chamber and vent for 15 to 20 seconds,
establishing the combustion air pattern;
4. After pre-purge period, solenoid valve opens, allowing oil to flow
through nozzle;
5. The ignition transformer spark ignites oil spray;
6. Cad cell senses flame and burner continues to fire;
7. After Fan-Limit Control heats up to the factory set point, the
circulating air blower starts;
8. The circulating air blower, burner motor and ignition transformer
remain on until the thermostat is satisfied. Also, the solenoid valve
remains open;
Thermostat is satisfied:
9. PDT relay contacts open, solenoid valve closes, burner fan motor
post-purges the combustion chamber and vent for a pre-set time of
15 seconds. The ignition transformer also continues to spark for
this time period;
10. During the post-purge cycle, the Fan-Limit Control cools down to
the factory set point of 32°C (90°F) and the circulating air blower
turns off.
3.2.2- Sequence of operation - Riello 40-BF
Side-wall venting
1. Normally open contact (W-R) on SPDT relay closed when
thermostat calls for heat;
2. Burner motor starts. The burner motor fan pre-purges the
combustion chamber and vent for 10 seconds, establishing the
combustion air pattern. During this time the solenoid valve holding
coil pressure will be approximately 100 psig;
3. After the pre-purge period, the solenoid valve opens, allowing oil to
flow through the nozzle. At the same time, the burner motor ignition
coil produces spark;
4. The ignition transformer spark ignites the oil spray;
5. Cad cell senses flame and burner continues to fire. Ignition
transformer ceases sparking;
6. After Fan-Limit Control heats up to the factory set point, the
circulating air blower starts;
7. The circulating air blower and burner motor remain on until the
thermostat is satisfied. Also, the solenoid valve remains open;
Thermostat is satisfied:
8. Relay contacts open, solenoid valve closes and the burner fan
motor post-purges the combustion chamber and vent for a pre-set
time of up to 15 seconds (5 inch breach model only);
9. During the post-purge cycle, the Fan-Limit Control BI-metal cools
down to the factory set point of 32°C (90°F), and the circulating air
blower shuts down.
NOTE: With burner relay contact open, the Riello 40-BF
will post-purge when 115 volt power is applied to the
burner.
3.2.3- Sequence of operation - Beckett AFG and Riello
40-F - Chimney venting
1. On the AFG burner, the T-T terminals have to be jumpered on the
primary control of the burner;
2. Normally open contact (W-R) relay closes when thermostat calls
for heat;
3. Burner motor starts. The burner motor fan pre-purges the
combustion chamber and vent for 10 to 15 seconds, establishing
the combustion air pattern. After the pre-purge period, the solenoid
valve opens, allowing oil to flow through nozzle. At the same time,
the burner motor ignition coil produces a spark;
4. Spark ignites oil droplets;
5. Cad cell senses flame and burner continues to fire. Ignition
transformer ceases sparking;
6. After Fan-Limit Control heats up to the factory set point, the
circulating air blower starts;
7. The circulating air blower and burner motor remain on until the
thermostat is satisfied;
Thermostat is satisfied:
8. Relay contacts open, solenoid valve closes, burner fan motor shuts
down and the ignition transformer ceases sparking.
3.2.4- Sequence of operation
Side Wall Venting system
Normal operation
1. Before a call for heat, the contacts of the pressure switch are
closed;
2. When the room thermostat calls for heat, the normally open contact
W-R closes, the burner blower starts and creates suction in the
intake piping circuit and pressure in the vent piping circuit;
3. The differential pressure set point of the pressure switch is not
exceeded and the thermostat circuit remains closed until the call
for heat has ended.
Abnormal operation
Start-up
1. When the room thermostat calls for heat, the normally open contact
W-R closes, the burner blower starts and creates suction in the
intake piping circuit and pressure in the vent piping circuit;
2. If there is a blockage in the intake or vent openings to cause a
pressure differential beyond the set point of the pressure switch,
DNS-0604 Rev.B