1. Prerequisites for burner start-up
1. Reset the program controller.
2. Close the damper. The limit switch "Z" (such as QSN30) in the closed position must transmit the electrical signal on terminal 11 to terminal 8.
3. The control contact of the closed position of the fuel valve (BV) or other contacts with similar inspection functions between terminal 12 and the air pressure switch (LP) must be closed.
4. The normally closed contact of the air pressure switch (LP) must be closed (air pressure test), that is, terminal 4 must output voltage.
5. The contacts of the gas pressure switch (GP) and the limit thermal switch or pressure switch (W) must also be closed.
2. Start-up procedure
1. A start command uses "R" (that is, "R" closes the control circuit between terminals 4 and 5)
2. (R) is closed, the program controller starts to run, and the fan motor contactor coil receives voltage through terminal 6 (*pre-blowing). After t7 (2s), the motor or flue fan also receives voltage through terminal 7 (pre-blowing or post-blowing).
3. After completing t16 (the time interval between the start and the damper opening command is 4-6s), the control command to open the damper is given through terminal 9. During the operation of the servo motor, the program controller does not operate because terminal 8 is not energized at this time. Only when the damper is fully opened and the damper limit switch "A" (fully open position SQN30) supplies power to terminal 8 and works according to the program, the program controller will start again.
4. t1—Pre-blowing time when the damper is fully opened (rated air volume) Shortly after the start of the pre-blowing time, the air pressure switch switches and selects terminal 4 to be disconnected from terminal 13, otherwise the control unit may be locked (air pressure check starts). At the same time, terminal 14 must be energized and power is supplied to the ignition transformer and fuel valve.
5. During the pre-blowing time, the safety function of the flame monitoring circuit is also tested (flame relay de-excitation). If the relay does not work properly, the control is locked.
6. After the pre-blowing time is completed, the control unit operates the damper damper in the low flame position through terminal 10, which is determined by the switching point of the auxiliary switch "M" of the damper controller.
7. During the running time, the programmer stops running again until terminal 8 receives voltage from "M". After a short time, the motor of the programmer switches to the control area of the control unit. Therefore, the control signal on terminal 8 from now on will no longer affect the further start-up (and subsequent operation) of the burner.
8. Adjustable extended flame burner t3-pre-blowing time, and then release the fuel by terminal 18. t4-time interval (the time interval between the start of t2 and the release of the valve on terminal 19). After t4 is completed, terminal 19 is energized, and this terminal supplies power to the fuel valve on the auxiliary switch "V" of the damper controller motor. t2-safety time.
9. The intermittent pilot burner has a pre-ignition time of t3…t3’, and then terminal 17 releases fuel for the pilot burner. During the time interval t4…t4’, the fuel valve on terminal 19 opens. This terminal is used to start the main burner load. t2…t2’ with ignition valve safety time (ignition load).
10. After the safety time is completed, the flame signal must reach the input terminal 22 of the flame signal amplifier. The signal must be maintained continuously until the control is turned off. Otherwise, the program controller is locked and self-locked.
11. t9—Second safety time. After the second safety time is completed, the main burner must be ignited by the pilot burner, because after this time, terminal 17 is no longer energized and the ignition valve will be closed.
12. t5—Time interval (the time interval between the end of t4 and the release of the load controller or valve on terminal 20). When t5 is completed, voltage is obtained on terminal 20, and the control output terminal 9 to terminal 11 and the control input terminal 8 are electrically disconnected from the control area of the control unit, so the latter prevents voltage from the load control circuit.
13. The start-up procedure of the control unit ends with the release of the load controller "LR" on terminal 20. The program controller switch automatically disconnects immediately or after some idling steps (i.e., no change in contact position).
III. Operation of the burner
1. B—Operation status of the burner
2. B—C Burner operation (heat generation) When the burner is running, the load controller runs the damper to the rated load or low flame position according to the requirement of heat generation. The rated load is achieved through the auxiliary switch "V" of the damper motor.
3. C—The control stops with the program with the "R" shutdown, the fuel valve is immediately closed, and the program controller restarts and compiles the program.
4. t6—Post-blowing time (post-blowing with fan G2 on terminal 7). Shortly after the post-blowing time starts, the voltage on terminal 10 is restored, so the damper damper reaches the minimum position, and the full closure of the damper damper is shortly before the post-blowing is completed, which is triggered by the control signal on terminal 11. During the subsequent burner disconnection period, the voltage is still maintained on terminal 8.
5. t13—Permissible post-combustion time During this time, the flame detection circuit may still receive a flame signal and will not trigger the burner lockout.
III. Burner operation
1. B—Burner operating status
2. B—C Burner operation (heat generation) When the burner is running, the load controller runs the damper to the rated load or low flame position according to the heat generation requirements. The rated load is achieved through the auxiliary switch "V" of the damper motor.
3. C—Use "R" to shut down the control and stop with the program, the fuel valve is immediately closed, and the programmer restarts and compiles the program.
4. t6—Post-blowing time (post-blowing with fan G2 on terminal 7). Shortly after the post-blowing time starts, the voltage on terminal 10 is restored, so the damper damper reaches the minimum position, and the full closure of the damper damper is shortly before the post-blowing is completed, which is triggered by the control signal on terminal 11. During the subsequent burner disconnection period, the voltage is still maintained on terminal 8.
5. t13 - Allowable post-combustion time. During this time, the flame detection circuit may still receive a flame signal and will not trigger the burner lockout.
1. Prerequisites for burner start-up
1. Reset the program controller.
2. Close the damper. The limit switch "Z" (such as QSN30) in the closed position must transmit the electrical signal on terminal 11 to terminal 8.
3. The control contact of the closed position of the fuel valve (BV) or other contacts with similar inspection functions between terminal 12 and the air pressure switch (LP) must be closed.
4. The normally closed contact of the air pressure switch (LP) must be closed (air pressure test), that is, terminal 4 must output voltage.
5. The contacts of the gas pressure switch (GP) and the limit thermal switch or pressure switch (W) must also be closed.
2. Start-up procedure
1. A start command uses "R" (that is, "R" closes the control circuit between terminals 4 and 5)
2. (R) is closed, the program controller starts to run, and the fan motor contactor coil receives voltage through terminal 6 (*pre-blowing). After t7 (2s), the motor or flue fan also receives voltage through terminal 7 (pre-blowing or post-blowing).
3. After completing t16 (the time interval between the start and the damper opening command is 4-6s), the control command to open the damper is given through terminal 9. During the operation of the servo motor, the program controller does not operate because terminal 8 is not energized at this time. Only when the damper is fully opened and the damper limit switch "A" (fully open position SQN30) supplies power to terminal 8 and works according to the program, the program controller will start again.
4. t1—Pre-blowing time when the damper is fully opened (rated air volume) Shortly after the start of the pre-blowing time, the air pressure switch switches and selects terminal 4 to be disconnected from terminal 13, otherwise the control unit may be locked (air pressure check starts). At the same time, terminal 14 must be energized and power is supplied to the ignition transformer and fuel valve.
5. During the pre-blowing time, the safety function of the flame monitoring circuit is also tested (flame relay de-excitation). If the relay does not work properly, the control is locked.
6. After the pre-blowing time is completed, the control unit operates the damper damper in the low flame position through terminal 10, which is determined by the switching point of the auxiliary switch "M" of the damper controller.
7. During the running time, the programmer stops running again until terminal 8 receives voltage from "M". After a short time, the motor of the programmer switches to the control area of the control unit. Therefore, the control signal on terminal 8 from now on will no longer affect the further start-up (and subsequent operation) of the burner.
8. Adjustable extended flame burner t3-pre-blowing time, and then release the fuel by terminal 18. t4-time interval (the time interval between the start of t2 and the release of the valve on terminal 19). After t4 is completed, terminal 19 is energized, and this terminal supplies power to the fuel valve on the auxiliary switch "V" of the damper controller motor. t2-safety time.
9. The intermittent pilot burner has a pre-ignition time of t3…t3’, and then terminal 17 releases fuel for the pilot burner. During the time interval t4…t4’, the fuel valve on terminal 19 opens. This terminal is used to start the main burner load. t2…t2’ with ignition valve safety time (ignition load).
10. After the safety time is completed, the flame signal must reach the input terminal 22 of the flame signal amplifier. The signal must be maintained continuously until the control is turned off. Otherwise, the program controller is locked and self-locked.
11. t9—Second safety time. After the second safety time is completed, the main burner must be ignited by the pilot burner, because after this time, terminal 17 is no longer energized and the ignition valve will be closed.
12. t5—Time interval (the time interval between the end of t4 and the release of the load controller or valve on terminal 20). When t5 is completed, voltage is obtained on terminal 20, and the control output terminal 9 to terminal 11 and the control input terminal 8 are electrically disconnected from the control area of the control unit, so the latter prevents voltage from the load control circuit.
13. The start-up procedure of the control unit ends with the release of the load controller "LR" on terminal 20. The program controller switch automatically disconnects immediately or after some idling steps (i.e., no change in contact position).
III. Operation of the burner
1. B—Operation status of the burner
2. B—C Burner operation (heat generation) When the burner is running, the load controller runs the damper to the rated load or low flame position according to the requirement of heat generation. The rated load is achieved through the auxiliary switch "V" of the damper motor.
3. C—The control stops with the program with the "R" shutdown, the fuel valve is immediately closed, and the program controller restarts and compiles the program.
4. t6—Post-blowing time (post-blowing with fan G2 on terminal 7). Shortly after the post-blowing time starts, the voltage on terminal 10 is restored, so the damper damper reaches the minimum position, and the full closure of the damper damper is shortly before the post-blowing is completed, which is triggered by the control signal on terminal 11. During the subsequent burner disconnection period, the voltage is still maintained on terminal 8.
5. t13—Permissible post-combustion time During this time, the flame detection circuit may still receive a flame signal and will not trigger the burner lockout.
III. Burner operation
1. B—Burner operating status
2. B—C Burner operation (heat generation) When the burner is running, the load controller runs the damper to the rated load or low flame position according to the heat generation requirements. The rated load is achieved through the auxiliary switch "V" of the damper motor.
3. C—Use "R" to shut down the control and stop with the program, the fuel valve is immediately closed, and the programmer restarts and compiles the program.
4. t6—Post-blowing time (post-blowing with fan G2 on terminal 7). Shortly after the post-blowing time starts, the voltage on terminal 10 is restored, so the damper damper reaches the minimum position, and the full closure of the damper damper is shortly before the post-blowing is completed, which is triggered by the control signal on terminal 11. During the subsequent burner disconnection period, the voltage is still maintained on terminal 8.
5. t13 - Allowable post-combustion time. During this time, the flame detection circuit may still receive a flame signal and will not trigger the burner lockout.