YLZK-E1 series boiler computer controller general operation manual

Henan Hongtai Boiler Manufacturing Co., Ltd.

Contents and precautions

I. Overview

Two, install the wiring

Three, display

Four, basic operation

Five, parameter setting

Six, operation and control

Seven, alarm and interlock protection

8. Exception handling and troubleshooting

Attached tables and drawings

Thank you for using our products. In order to use this machine correctly and to give full play to its effectiveness, please read the instructions carefully before using it!

open box to check:

◇ Observe the specifications and models marked on the product packaging box, and confirm that they are consistent with your order

◇ Check the specifications and quantity of products and accessories according to the packing list

◇ Confirm that the machine is not damaged during transportation

◇ If you have any questions, please contact our company within 3 days. If you do not contact the company in writing within 7 days after receiving the goods, it will be deemed to have been approved by you. Exceeding this limit will not be accepted.

Safety attention

◇ This machine must be installed by qualified professional and technical personnel according to the instructions

◇ Accessories used for installation must comply with national electrical standards

◇ Confirm that the power supply voltage is within the specified range and ensure a good grounding

◇ Don't connect strong current to weak current signal input terminal

◇ Lightning protection modules should be used to protect the controller in areas with high incidence of lightning disasters

After-sales service

◇ When you encounter problems or equipment failures, please contact our company's customer service department in time. Please explain as much as possible when reporting the problem: product model, serial number, accessories, boiler manufacturer, purchase date, usage, and specific failure phenomena

◇ In the case of normal installation and use, the quality problem of this machine within 12 months from the date of leaving the factory will be guaranteed free of charge at the factory. After the warranty period expires, a corresponding fee will be charged according to the situation

◇ If the following problems occur, the user shall bear the relevant expenses: ① Man-made damage caused by improper use ② Damage caused by natural disasters and pollution, etc. ③ Damage caused by abnormal power supply voltage, improper circuit connection, etc.

Conditions of Use

◇ Ambient temperature: 0 ～ 45 ℃

◇ Atmospheric pressure: 86 ～ 106 Kpa

◇ Relative humidity: <90% (no condensation)

◇ Rated power supply voltage: 220V AC, frequency: 50Hz

◇ Power supply voltage range: 90% to 110% of rated value

◇ Strong current lines and weak current lines connected to sensors must be routed through pipes separately, otherwise the controller may not work normally

◇ When the original wiring of the temperature sensor needs to be extended, a shielded wire should be used

I. Overview

YLZKE1 series 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-price ratio and so on.

This manual contains a description of all the control types supported by YLZK-E1 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.

②According to the "User Wiring Diagram", connect the strong and weak wires that need to be connected to the corresponding terminals of the controller.

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 it is plugged in place.

2.2 Input signal (possible input signal)

2.2.1 Wiring

Please use 0.3mm2 copper multi-strand flexible wires for the wiring of the input signal, and use shielded cables as much as possible. Please connect the shielding layer (copper mesh) of the shielded cable to the mounting column and press it tightly with the circuit board with screws.

2.2.2 Temperature sensor

Using 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 signals, 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 neutral line! Although this wiring can sometimes make the controller detect the water level, it will reduce the reliability and stability of the water level detection, and may even burn the controller input circuit.

Attention should be paid 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 (inside 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 failure 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 the 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 the wires must be routed in parallel, please separate the two wire harnesses by 15cm or more to avoid introducing too much electromagnetic interference into the weak current system.

2.3.2 Burner control

① The burner control output is the two ends of the normally open contact of the relay, and there is no power output.

② The relay contact capacity is 10A/220VAC, and the load should not be greater than 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, and there is no power output.

②The relay contact capacity is 10A/220VAC, and the load should not be greater than 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 water pump.

② The relay contact capacity is 10A/220VAC, and the load should not be greater than 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 state), 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

Low pressure medium pressure high pressure

3.7 Water level display

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 "minimum" 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 accumulative working hours of burners

Press the "+" key 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 cumulative working time of the burner and flashes, and the controller automatically restores the original display after a few seconds of stopping operation.

3.10 Fault alarm display

              Alarm code Alarm name

Four, basic operation

4.1 Connect the 220V AC power supply, the buzzer emits a prompt tone.

4.2 Press the "" key, the buzzer will sound once, the controller is turned on, and the LCD screen will turn on and display. At this time, the controller is 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 "" key to start the furnace, and then press the "" key 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. For details, please refer to the "Quick Operation Guide" of the corresponding furnace type.

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 parameter set this time is 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 the value to be larger, 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 time 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 "" button again to set the next parameter, and the settings for the rest of the time period 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 revises 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 the time can be kept running after 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, please refer to 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 the water pump when the alarm signal is found. The controller automatically displays the alarm information, and displays the fault code at the same time 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 will lock 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