I. Overview

YLZK-X1/XP1368series boiler computer controller is a new generation of fuel and gas boiler computer controller introduced by our company by absorbing foreign advanced technology, combining the actual needs and specific applications of domestic boiler control, using modern computer control technology. Suitable for automatic control of oil and gas boilers, electric heating boilers, steam boilers, pressurized hot water boilers, atmospheric hot water boilers and heat conduction oil boilers, with boiler water level control, boiler water temperature control, steam pressure control, and limit low water level alarm And automatic control functions such as interlock protection, super high steam pressure alarm and interlock protection. It has the advantages of high reliability, high degree of automation, convenient use, simple operation, rich functions, flexible control, beautiful appearance, complete variety, high performance and price ratio.

This manual contains descriptions of all the control types supported by YLZK-X1 series controllers. For a specific model of controller, it may not have the functions described in this manual. Therefore, after reading this manual, you should also read the "Quick Operation Guide" of the specific model controller in detail.                       

Two, install the wiring

2.1 Installation method

①Open the installation hole according to the "outline and hole size drawing", and pass the wire to be connected out of the hole.

② Connect the strong and weak wires to the corresponding terminals of the controller according to the "User Wiring Diagram".

③Insert the controller into the mounting hole.

④If you need to check and repair the controller, you can easily pull out the terminal without removing the connected wire; when inserting the terminal into the controller, make sure that the connection is in place.

2.2 Input signal (possible input signal)

2.2.1 Wiring

Please use 0.3mm2 copper multi-strand flexible wire for input signal wiring, and use shielded cables as much as possible. The shielding layer (copper mesh) of the shielded cable should be connected to the mounting post, and be pressed against the circuit board by screws.

2.2.2 Temperature sensor

Use the thermistor (NTC) as the temperature sensor, the graduation number is: R (25°C) = 100K, B (25°C/50°C) = 3950K.

2.2.3 Pressure sensor

The pressure sensor uses a pressure controller (pressure switch) and an electric contact pressure gauge. Please connect the normally closed contact of the pressure controller (the contact is closed when the pressure is lower than the low setting value; the contact is disconnected when the pressure is higher than the high setting value) to the controller.

When the pressure sensor is a pressure transmitter, the controller supports 4-20mA input signal, but it needs to be explained when ordering. At this time, the DIP switch of the corresponding channel on the circuit board should be adjusted to the current side (I1 side), and the range needs to be set.

2.2.4 Water level sensor

The water level sensor uses a water level electrode. The water level electrode is a sensor that uses the conductivity of water to measure the water level. When the water level is higher than the electrode, the electrode forms a loop between the water and the measuring cylinder shell; when the water level is lower than the electrode, there is no loop between the electrode and the measuring cylinder shell. . The controller obtains the water level status by detecting the signal.

The common end of the water level electrode must be connected to the shell of the measuring cylinder. It must not be connected to the boiler shell or stainless steel outer cover, let alone the power zero line! Although this wiring can sometimes enable the controller to detect the water level, it will reduce the reliability and stability of the water level detection, and may even burn the controller input circuit.

Care should be taken to keep the insulator part of the water electrode clean. Scale or other dirt may reduce the insulation performance at both ends of the electrode, causing the controller to be unable to distinguish the water level (due to the reduced insulation performance, there is always a loop between the electrode and the common terminal, and the controller detects The signal will always show water).

2.2.5 Furnace wall temperature switch

The furnace wall temperature switch should be fixed close to the boiler shell (in the insulation layer). When the furnace wall temperature is higher than the set value, the temperature switch contact signal is disconnected. This signal reflects whether the boiler water level is lower than the sensor installation position, and whether there may be a dry burning phenomenon, which can be used as a backup for the extreme low water level protection to further improve the safety of the boiler operation.

2.2.6 Burner fault signal

When the burner program controller detects abnormal gas pressure, blower air pressure, flame interruption or unignited abnormality, it will immediately stop the furnace for protection, lock the programmer, and output a 220 volt voltage signal on the burner fault light signal. After the controller detects the signal, it interlocks to shut down controlled equipment such as the water pump, and displays the alarm information on the screen and sends out an audible and visual alarm to remind the furnace staff to deal with it in time.

2.3 Control output

2.3.1 Wiring

For the control output line, please select a copper multi-strand flexible wire with an appropriate cross-sectional area according to the power of the controlled electrical appliance. Pay attention to the secure connection of the terminal, otherwise it will easily cause the terminal to heat up and burn after power on.

Please run the tube separately from the sensor's weak current signal line, and avoid paralleling the sensor's weak current signal line in the routing. When wiring must be parallel, please separate the two wiring harnesses by 15cm or more to avoid introducing electromagnetic interference into the weak current system too much.

2.3.2 Burner control

① The burner control output is the two ends of the normally open contact of the relay without power output.

② The relay contact capacity is 10A/220VAC, and the load should not exceed 500W when used.

③ The burner control output can be connected to the start-stop control end of the burner, or it can be connected in series with the burner's power circuit.

2.3.3 Heating group control

①The control output is the two ends of the normally open contact of the relay, without power output.

②The relay contact capacity is 10A/220VAC, and the load should not exceed 500W when used.

③The contactor and leakage protector of appropriate power should be connected to drive the heating group.

2.3.4 Water pump (or water supply solenoid valve) control

① The pump control output is the two ends of the normally open contact of the relay, and there is no power output. It is usually connected in series in the power supply circuit of the pump.

② The relay contact capacity is 10A/220VAC, and the load should not exceed 500W when used. It is recommended to connect a 20A fuse in series with the relay circuit as overload protection when wiring.

③ If the pump power is greater than 500W or three-phase power supply is required, an appropriate power contactor and thermal overload relay should be connected.

Three, display

This machine is equipped with a large backlit LCD with rich display functions, which can accurately and intuitively display the operating status of the controller and the collected temperature, pressure, and water level.

3.1 Controller running status display

The current status of the controller is displayed at the top right of the screen. When the controller is in the standby state, the position displays ""; when the controller is in the running state (the burner starts to work according to the boiler water temperature status), the position displays" "; when the controller is in the alarm state (interlocking furnace shutdown protection) When the controller is in the parameter setting state, the position displays ""; when the controller is in the parameter setting state, the position displays" ".

3.2 Water pump working status display                            

      Water pump stopped Water pump running Water pump manual state

3.3 Burner status display                          

       Burner stop, burner small fire, burner high fire

3.4 Heating group display

3.5 Analog input display                                          

Temperature display Pressure display (pressure transmitter mode)

3.6 Pressure display
To

Low pressure medium pressure high pressure

3.7 Water level display

                           To

Boiler water level is lower than boiler water level is lower than boiler water level is higher than boiler water level is higher than water level sensor

Extreme low water level electrode Low level electrode Low level electrode High level electrode Device failure

When the boiler water level is lower than the limit low water level electrode, the word "lowest" flashes in the water level display.

When the water level sensor fails, the highest display box corresponds to the state of the super high electrode; the next highest display box corresponds to the state of the high electrode; the third display box corresponds to the state of the low electrode; the fourth display box corresponds to the state of the extreme low water level electrode . By observing the screen display, the malfunctioning electrode can be quickly determined, which is convenient for users to troubleshoot.

3.8 Current time display

Normally, the display bar in the middle of the right side of the screen displays "current time". As shown below:

Current time display

3.9 Review of cumulative working hours of burners

Press the "+" button when not in the setting, alarm state, or in the manual operation of the pump, the display bar in the middle of the left side of the screen displays the accumulative working time of the burner and flashes, the controller will automatically restore the original display after a few seconds of stopping operation.

3.10 Fault alarm display

 To

              Alarm code Alarm name

Four, basic operation

4.1 When the 220V AC power supply is connected, the buzzer emits a prompt tone.

4.2 Press the "" button, the buzzer will sound once, the controller is turned on, and the LCD screen will open for display. The controller is now in a standby state.

4.3 Keyboard

After the controller is turned on, the operator can enter the operating state (start the furnace), exit the operating state (stop the furnace), manual water pump, set time and other operations through the keyboard. Usually, the furnace staff only needs to press the "" button to start the furnace, and then press the "" button to stop the furnace, which is very simple.

4.4 In the standby state, press the "" key to enter the running state, and the controller will start and stop the burner or heating group and the start and stop of the water pump and other equipment according to the start.

4.5 In the running state, press the "" key to exit the running state, and the controller will turn off the burner or heating group and the water pump.

4.6 Press the "" key in the power-on state, the LCD screen will turn off the display, and the controller will turn off.

4.7 Manual operation of water pump

Manual operation can be carried out through the "" and "" keys, see the "Quick Operation Guide" of the corresponding furnace type for details.

Five, parameter setting

Non-time parameter settings can be performed when the controller is in running and standby state. Press the "" key, the controller enters the setting state. In the setting state, press the "" key to select the next parameter. When in the last parameter, press the "" key, the controller exits the setting state, and the parameters set this time are saved. If you don't want to save the parameters set this time, you can press the "" key halfway to exit the setting state.

In the setting state, press the "" or "" key to modify the selected parameter. If you need to adjust a larger value, press and hold the "" or "" key, and the data will increase or decrease rapidly until the key is released or the parameter reaches the limit value.

In the standby state, press the "" key for 5 seconds to enter the period and time setting state. When the first time period is set, “” is displayed, when “start time” is set, “” is displayed, and when “stop time” is set, “” is displayed. The time display window displays the corresponding value. Press the "" key again to set the next parameter, and the settings of the remaining time periods can be deduced by analogy. A total of 4 time periods can be set.

    The time setting range is 0.00～23.59. The time period setting must follow the order from 0.00 to 23.59, and no inversion or overlap is allowed. For example, if the "start time" of the first period is set to "8.00", all subsequent stop and start times cannot be less than "8.00". The controller automatically checks and corrects the timing parameters according to this limit.

The start and stop time of the time period can be the same. At this time, the length of the time period is zero, which is an invalid time period. You can turn off unnecessary periods by setting the same start-stop time.

If all 4 time periods are set to "start time" equal to "stop time", the controller will do no timing processing, and the whole day is the start time.

The current time, using the 24-hour clock. The clock of this machine is equipped with a back-up power supply, and it can keep running when the external AC power supply is cut off.

Note: The real-time clock is selected according to customer requirements. If you need this function, please contact the company.

Six, operation and control

For details, see the "Quick Operation Guide" of the corresponding specific model controller.

Seven, alarm and interlock protection

After the controller is turned on, it continuously detects the pressure sensor, water level sensor, temperature sensor and its own circuit, and immediately sends out an audible and visual alarm and locks the burner (or heating group) and water pump when the alarm signal is found. The controller automatically displays the alarm information, and displays the fault code when the furnace is interlocked and shut down.

When alarming, the internal buzzer of the controller will sound an alarm. Press any key to turn off the alarm sound.

After the controller enters the alarm state, it locks itself, even if the alarm signal disappears, it will not exit the alarm state by itself. After the operator eliminates the alarm, press the "" key to reset the controller.

8. Exception handling and troubleshooting.

8.1 No display after power on

When the controller is powered on, a beep will sound. If there is no beep, please use a multimeter to check that there should be 220V AC voltage at the power inlet end, and the AC voltage at both ends of the self-recovery fuse (FUSE1, C600 R150) above the power inlet end should be 0V. If the above two items are normal, please contact our company's customer service department.

If there is a prompt tone, please press the "" key, and the controller should be turned on and displayed. If there is no power-on display, and there is no key tone when pressing the button, please contact our company's customer service department and explain the situation.

8.2 Water pump does not work

Please observe the screen display to see if the pump is running. If there is no running display of the water pump on the screen, please observe whether the water level display is medium water level or high water level, whether the pump is in manual state, whether the controller is in alarm state, etc., because the controller will not start the pump in these states.

If the water pump is running on the screen, please use a multimeter to check whether there is 220V AC voltage at both ends of the pump control output terminal. If there is 220V AC voltage, please contact our company’s customer service department and explain the situation; if there is no 220V AC voltage, please Check whether the power supply circuit of the water pump is normal.

8.3 The burner (or heating group) does not work

Please observe the screen display, whether the burner (or heating group) is in operation. If the burner (or heating group) has no working display on the screen, please observe whether the pressure display is high pressure, whether the temperature is too high, whether the controller is not in operation, etc., because the controller will not start the burner under these conditions ( Or heating group).

If the burner (or heating group) has a working display on the screen, please use a multimeter to check whether there is 220V AC voltage at both ends of the burner (or heating group) control output terminal. If there is 220V AC voltage, please contact our company's customer service department And explain this situation; if there is no 220V AC voltage, please check whether the burner (or heating group) power supply circuit is normal or whether the burner itself is in the protection lock state.