YLZK-X2/XP2568 series boiler computer controller

General instruction manual

Nanjing Rentai Faen Electric Co., Ltd.

Contents and notes

I. Overview

Installation and wiring

Third, display

Fourth, the basic operation

Five, parameter setting

Operation and control

Seven, alarm and chain protection

Eight, exception handling and troubleshooting

Schedules and drawings

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

open box to check:

◇ Observe the specifications and models marked on the product 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 us within 3 days. If you do not contact the company in writing within 7 days of receiving the goods, it is deemed that you have approved it. Exceeding this limit will not be accepted.

Safety note

◇ This machine must be installed by professional technicians with corresponding qualifications according to the instructions

◇ The accessories used for installation must meet the national electrical standards

◇ Make sure that the power supply voltage is within the specified range and ensure good grounding

◇ Do not connect strong current to weak current signal input

◇ Lightning protection modules should be used to protect the controller in areas where lightning strikes are high.

After sales service

◇ When you encounter problems or equipment failure, please contact our customer service department in time. Please explain as much as possible when reflecting the problem: product model, serial number, accessories, boiler factory, purchase date, usage, specific failure phenomenon

◇ In the case of normal installation and use, if the machine has a quality problem within 12 months from the date of shipment, a free warranty is provided at the factory. Appropriate fees will be charged after the warranty period has expired

◇ If the following problems occur, the user should bear the relevant costs: ① Human damage caused by improper use ② Damage caused by natural disasters and pollution ③ Damage caused by abnormal power voltage and improper circuit connection

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 separately, otherwise the controller may not work properly

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

I. Overview

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

This manual contains descriptions of all the control types supported by the YLZK-E2 series controller. For the specific model of the controller, it does not necessarily have the functions described in this manual. Therefore, after reading this manual, you should also read the "Quick Operation Guide" for the specific model controller in detail.

Installation and wiring

2.1 Installation method

① Open the mounting holes according to the “Outline and Cutout Dimensional Drawings”, and the wires to be connected shall pass through the cutouts.

② Connect the strong and weak wires to be connected to the corresponding terminals of the controller according to the "user wiring diagram".

③ Install the controller into the mounting hole.

④ If you need to repair the controller, you can easily pull out the terminals without removing the connected wires; when you insert the terminals into the controller, you should ensure that they are in place.

2.2 Input signal (possible input signal)

2.2.1 Wiring

For input signal wiring, please use 0.3mm2 copper multi-strand flexible wire, and shielded cable should be used as much as possible. The shielding layer (copper mesh) of the shielded cable should be connected to the installation column, and it should be pressed against the circuit board with screws.

2.2.2 Temperature sensor

Thermistor (NTC) is used as the temperature sensor. The division 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. 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 open when the pressure is higher than the high setting value).

When the pressure sensor is a pressure transmitter, this 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 or I2 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 this signal.

The common end of the water level electrode must be connected to the housing of the measuring cylinder. It must not be connected to the boiler housing or stainless steel outer casing, and it must not be connected to the neutral line of the power supply! 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.

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 fail to distinguish the water level. (Due to the decrease in insulation performance, there is always a loop between the electrode and the common end. 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 turned off. This signal reflects whether the boiler water level is lower than the sensor installation position, and whether there is a possibility of dry burning. It can be used as a backup for the limit low water level protection to further improve the safety of boiler operation.

2.2.6 Burner fault signal

When the burner program controller detects abnormalities such as abnormal gas pressure, blower wind pressure, flame interruption or non-ignition, it will immediately stop the furnace protection, lock the program controller, and output a 220 volt voltage signal on the burner fault lamp signal. After the controller detects the signal, it will interlock to shut down the controlled equipment such as the water pump, display an alarm message on the screen and issue an audible and visual alarm, prompting the boiler staff to handle it in time.

2.3 Control output

2.3.1 Wiring

For the control output line, please select a copper multi-stranded flexible conductor with an appropriate cross-sectional area according to the power of the controlled electrical appliance. Pay attention to the reliability of the terminal wiring, otherwise the terminal will be easily burned after being powered on.

Separate the tube from the weak electrical signal line of the sensor. Avoid running parallel to the weak electrical signal line of the sensor. When the cables must be run in parallel, please separate the two wire 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, and there is no power output.

② The relay contact capacity is 10A / 220VAC, and the load should not be greater than 500W during use.

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

2.3.3 Heating group control

① The 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 in use.

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

2.3.4 Water pump (or make-up 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 be greater than 500W during use. It is recommended to connect a 20A fuse in series with this relay circuit as overload protection during wiring.

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

2.3.5 Current output

This controller has a 4 ～ 20mA output channel, which can be used to achieve continuous adjustment, and can be connected to inverters and other equipment.

 

Third, display

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

 

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, this position displays ""; when the controller is in the running state (the burner starts to work according to the temperature of the furnace water temperature), the position displays ""; when the controller is in the alarm state (interlocked shutdown protection) "" Is displayed at this position; "" is displayed at this position when the controller is in the parameter setting state.

3.2 Pump working status display

                            

      Water pump stopped Water pump running Water pump manual status

 

3.3 Burner status display

                           

       Burner stop burner small fire burner large fire

 

3.4 Heating group display

 

3.5 Analog output display

 

3.6 Analog input display

                                          

Temperature display Pressure display (pressure transmitter mode)

3.7 Pressure display

Ranch

Low pressure medium pressure high pressure

3.8 Water level display

                             Ranch

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 sensing

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

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

When the water level sensor fails, the highest display block corresponds to the state of the super-high electrode; the next highest display block corresponds to the state of the high-level electrode; the third display box corresponds to the state of the low-level electrode; the fourth display box corresponds to the state of the limit low-water electrode . By observing the screen display, you can quickly determine the faulty electrode, which is convenient for users to eliminate.

 

3.9 Current time display

In general, the current time is displayed in the display bar on the right side of the screen. As shown below:

 

Current time display

 

3.10 Reading of Burner's Cumulative Working Time

When not in the setting, alarm state, or manual operation of the pump, press the "+" key. The display column on the left side of the screen shows the cumulative working time of the burner and blinks. The controller automatically returns to the original display after a few seconds of stopping operation.

 

3.11 Fault alarm display

 Ranch

              Alarm code Alarm name

 

Fourth, the basic operation

4.1 When 220V AC power is connected, the buzzer will sound a tone.

4.2 Press the “” key, a buzzer will sound, the controller will start, and the LCD screen will open. The controller is now on standby.

4.3 Keyboard

After the controller is turned on, the operator can perform operations such as entering the operating state (starting the furnace), exiting the operating state (stop the furnace), manual operation of the pump, and setting the time through the keyboard. Generally, the furnace manager 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. The controller controls the start and stop of the burner or heating group and the start and stop of the 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 turns off the burner or heating group and the water pump.

4.6 Press the “” key in the power-on state, the LCD screen will close and the controller will shut down.

4.7 Manual operation of water pump

Manual operation can be performed through the “” and “” keys. For details, please refer to the “Quick Operation Guide” of the corresponding furnace type.

Five, parameter setting

Non-time parameters can be set when the controller is in running or standby state. Press the “” key, the controller enters the setting state. In the setting state, press "" to select the next parameter. When it is at 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 a larger value, you can press and hold the “” or “” key, 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 setting the first time period, "" is displayed, when "start time" is set, "" is displayed, and when "stop time" is set, "" is displayed. The time display window shows the corresponding value. Press the “” key again to enter the next parameter setting, and the rest of the time zone settings can be deduced by analogy, a total of 4 time zones can be set.

    The time setting range is 0.00 ~ 23.59. The time period must be set in the order from 0.00 to 23.59. Inversion and overlap are not allowed. For example, if the “start-up time” of the first period is set to “8.00”, all subsequent stop-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 period can be the same. At this time, the length of the period is zero, which is an invalid period. You can turn off unnecessary periods by setting the same start and stop time.

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

Current time, using a 24-hour clock. The clock of this machine is equipped with backup power. It can keep the time when the external AC power is cut off.

Operation and control

For details, refer to the Quick Operation Guide of the specific controller.

Seven, alarm and chain protection

After the controller is turned on, the pressure sensor, water level sensor, temperature sensor and its own circuit are continuously detected. When an alarm signal is found, an audible and visual alarm is issued immediately, and the burner (or heating group) and the water pump are shut down. The controller automatically displays alarm information, and displays the fault code when the interlock is stopped.

When an alarm occurs, the buzzer inside the controller will sound an alarm. Press any key to turn off the alarm sound.

The controller locks itself after entering the alarm state, even if the alarm signal disappears