A very comprehensive construction plan for the building automation system, including the construction process

Hello everyone, I'm Brother Xue. Readers of our VIP member group consulted the construction plan of the building automation system, and today shared a very comprehensive construction plan for the building automation system, including various types of sensor installation, including system commissioning, you can make a program material, it is recommended to collect it for later use.

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Construction technology of building automation system

(1) Environmental inspection before installation

Before the installation of on-site equipment, the civil engineering and basic decoration of the equipment room and equipment installation site should be basically completed, and a wide range of decoration processes should not be carried out. The equipment room should be equipped with lighting, power supply conditions and anti-theft security measures.

Before the installation of the central control management machine and network communication equipment, the civil engineering and computer room decoration works of the central control room should be completed, and the site should meet the requirements of dust-free and anti-theft, and provide the necessary lighting and power supply conditions.

Before the building automation equipment is energized and commissioned, the controlled electromechanical equipment should have completed its single commissioning and can operate normally manually on site.

(2) Pre-construction equipment inspection

The appearance of the equipment is complete, and the paint layer on the inner and outer surfaces is intact.

The overall dimensions of the equipment, the model and specifications of the motherboard and wiring ports in the equipment meet the design requirements.

(3) Equipment and cable installation methods

A. Basic installation methods of instruments and equipment

(1) The opening position of the instrument measuring point shall be selected in accordance with the provisions of the design drawings, and the following provisions shall be carried out in accordance with the following provisions when there are no specific provisions:

The position of the instrument hole should be selected on the straight end of the pipeline, and the hole should avoid local components such as valves, plugs, tees, reducers, baffles, and hand holes.

When installing the source parts, no holes and welds should be made in the weld and its edges.

When the pressure bore and the temperature bore are on the same pipe section, the pressure bore should be selected on the upstream side of the temperature borehole.

The measuring instrument should be installed in the parametric location that best represents the medium being measured.

(2) Instruments and equipment should be adjusted before installation and use.

(3) Instruments and equipment should be installed in a convenient location for maintenance, and try to avoid installation in places with vibration, moisture, susceptibility to mechanical damage, strong magnetic field interference and strong corrosive gases. If it cannot be avoided, corresponding protective measures should be taken.

(4) The junction box of the instrument should be facing downward.

(5) The installed instruments and equipment should not be subjected to external mechanical stress.

(6) When the instrument and equipment are installed, they should not be subjected to shock and vibration, and the installation should be firm, and the text and terminal number on the sign should be easy to observe.

(7) The direction of the arrow on the instrument housing should be consistent with the flow direction of the measured medium.

(8) The instrument should be installed at the same time as the construction equipment. When cleaning the water system of construction equipment, the meter is removed first. However, when conducting pressure tests, the meter and the water system of the building equipment should be tested together.

B. Temperature and humidity sensors

(1) Outdoor temperature and humidity sensors should not be installed in direct sunlight, away from areas with strong vibration and electromagnetic interference, and their location should not damage the beauty and integrity of the appearance of the building.

(2) The indoor temperature and humidity sensor should be as far away as possible from the location of windows, doors and air conditioning outlets, and the distance from it should not be less than 2M if it cannot be avoided.

(3) The height of indoor temperature and humidity sensors installed in parallel should be the same, and the height difference should not be greater than 1mm, and the height difference in the same area should not be greater than 5mm.

(4) The air duct type temperature and humidity sensor should be installed in a position where the wind speed is stable and can reflect the wind temperature and humidity. The installation position should avoid the position of the dead angle of the air duct and the position of the steam vent.

(5) The air duct type temperature and humidity sensor should be installed after the air duct insulation layer is completed. The installation location should be selected in a place that is convenient for debugging and maintenance

(6) The opening and welding of the water pipe type temperature sensor must be carried out before the corrosion protection, lining, purging and pressure of the process pipeline. Its installation position should avoid openings and welds on the weld and its edges.

(7) When the temperature sensing section of the water pipe type temperature sensor is greater than half of the diameter of the pipe, it can be installed on the top of the pipeline. If the temperature sensing section is less than half of the diameter of the pipeline, it should be installed on the side or bottom of the pipeline.

(8) The connection between the temperature sensor and the DDC should meet the design requirements, and the error caused by wiring should be minimized, and the wiring resistance for the nickel temperature sensor should be less than 3Ω. The total wiring resistance of a 1KΩ platinum temperature sensor should be less than 1Ω.

C. Pressure, differential pressure sensor and differential pressure switch

(1) The pressure and differential pressure sensors of the air duct should be in the straight pipe section of the air duct, if they cannot be installed in the straight pipe section, they should avoid the location of the ventilation dead angle and steam vent in the air duct. The installation position should be convenient for debugging and maintenance.

(2) The installation of the duct type pressure and differential pressure sensor should be after the completion of the air duct insulation layer.

(3) The installation and welding of water pipe type and steam type pressure and differential pressure sensors must be carried out before the anti-corrosion, village, purging and pressure test of the process pipeline. The sensor should not be installed on the weld and edge of the pipe, the opening and the weld.

(4) The direct pressure section of the water pipe type and steam type pressure and differential pressure sensor can be installed on the top of the pipeline when it is greater than two-thirds of the pipe diameter, and can be installed on the side or bottom when it is less than two-thirds of the pipe diameter and the position where the water flow beam is stable.

(5) When the temperature or humidity sensor needs to be installed at the same location, the pressure and differential pressure sensor should be installed on the upstream side of the temperature and humidity sensor.

(6) When installing the differential pressure switch, it is advisable to place the film in a position perpendicular to the plane.

(7) The installation of the air pressure differential switch should be completed after the air duct insulation layer is completed. The installation location should be convenient for commissioning and maintenance, and avoid the steam venting.

(8) The air pressure differential switch should not affect the sealing of the air conditioner body. The differential pressure switch wiring should be connected to the differential pressure switch by a hose.

D. Flow meter and water flow switch

(1) The measuring hole of the measuring and pressure instrument should be selected in a place where the medium flow rate is stable and the cross-sectional velocity of the pipeline is uniform. The installation location should be convenient for maintenance and avoid piping vibration.

(2) The positive and negative pressure chambers of the differential pressure gauge or differential pressure transmitter must be connected correctly with the measuring pipeline.

(3) There shall be a straight pipe section on the upstream side of the electromagnetic flow transmitter of the water pipe, the length of which shall be 10 times the diameter of the medium pipe, and the length of the downstream straight pipe shall not be less than 5 times the pipe diameter. If there are valves, pipe diameters, elbows and other equipment that affect the flow stability before and after the transmitter, the length of the straight pipe section needs to be increased accordingly

(4) When the flow of the water pipe may cause reverse flow, a check valve is installed behind the flow transmitter.

(5) When there is a pressure measuring point or temperature measuring point near the installation position, the flow transmitter should be installed at a position that is (3.5-5.5)D away from the pressure measurement point, and the temperature measurement should be set at the downstream side, and the temperature measurement should be set at a distance from the flow sensor (6-8)D.

(6) The installation of electromagnetic flowmeter shall comply with the following provisions:

The flowmeter, the measured medium and the process pipeline should be connected to the equipotential and should be grounded;

When installed on a vertical process pipeline, the flow direction of the measured medium should be from bottom to top, and when installed on a horizontal and inclined process pipeline, the two measuring electrodes should not be directly above and below the process pipe;

When the diameter is greater than 300 mm, there should be a special bracket support;

When there is a strong magnetic field in the surrounding area, anti-interference measures should be taken.

(7) The installation opening and welding of the water flow switch shall be carried out before the anti-corrosion, lining, purging and pressure test of the process pipeline.

(8) The water flow switch should not be installed on the weld and its edge, the opening and the weld. The water flow switch should be installed on the horizontal pipe section and should not be installed on the vertical pipe. The installation position should be convenient for debugging and maintenance.

E. Fuel Gauge Sensor

The distance between the bare conductors of the power sensor or between them and other bare conductors should not be less than 4mm, and when it cannot be satisfied, they should be insulated from each other. The input end of the voltage transformer is not allowed to be short-circuited, and the output end of the current transformer is not allowed to be open-circuited.

F. Level Gauge

(1) The installation of the float level gauge should be such that the float is in a vertical state. Its installation height should make the full range of the instrument the normal liquid level.

(2) When measuring the liquid level with a differential pressure gauge or differential pressure transmitter, the installation height of the instrument should not be higher than the lower pressure inlet.

G. Electric Control Valve

(1) The pointing of the arrow on the valve body should be consistent with the direction of the medium flow. When there are special requirements, it should be carried out according to the installation instructions of the valve body equipment.

(2) When installing a small-bore control valve with a threaded connection, it is equipped with a detachable movable connector.

(3) The actuator should be fixed firmly, and the operating handwheel should be in a position that is convenient for operation. For motorized valves with a valve position indication device, the valve position indicator device should be oriented towards a position that is easy to observe.

(4) The mechanical transmission of the actuator should be flexible, without looseness and jamming. When the regulating mechanism can produce thermal displacement along with the process piping, the actuator should be installed in such a way that the relative position of the actuator and the regulating mechanism remains unchanged.

(5) When the diameter of the electric valve is inconsistent with the diameter of the pipeline, the tapering fittings should be used, and the diameter of the electric valve should generally not be lower than the diameter of the pipeline, and meet the design requirements.

(6) The electric valve should be installed vertically on the horizontal pipeline, especially for the large-diameter electric valve. Electric valves are generally installed on the return pipe.

(7) The electric valve installed outdoors should be properly protected from the sun and rain.

(8) When the electric control valve is installed, it should avoid bringing additional pressure to the control valve, and when the control valve is installed in a long place with a long pipeline, the bracket should be installed and shock absorption measures should be taken.

H. Electric damper controller

(1) The connection between the damper controller and the damper shaft should be fixed. The opening and closing of the mechanical mechanism should be flexible, and there should be no loosening or jamming.

(2) After the damper controller is installed, the opening and closing indication position of the damper controller should be consistent with the actual condition of the damper, and the damper controller should be oriented to a position that is easy to observe.

(3) The damper controller should be installed perpendicular to the shaft of the damper, and the vertical angle should not be less than 85 degrees.

(4) The output torque of the damper controller is matched with the required damper and meets the design requirements.

(5) When the damper controller cannot be directly connected with the damper baffle shaft, it can be connected to the baffle shaft through accessories, but the accessory device ensures the adjustment range of the rotation angle of the damper controller.

I. Installation of on-site substations and central control room equipment

(1) Before installation, the civil engineering, air conditioning and electrical works should have been completed.

(2) The production size of the steel base of the dashboard (console) is consistent with the instrument panel (console), and the allowable deviation of its straightness is 1 mm per meter, and when the total length of the steel base exceeds 5 meters, the allowable deviation of the total length is 5 mm.

(3) When the steel base of the dashboard (console) is installed, its upper surface should be kept horizontal, and the allowable deviation of the inclination in the horizontal direction is 1 mm per meter, and when the total length of the section steel base exceeds 5 meters, the allowable deviation of the total length is 5 mm.

(4) The steel base of the instrument panel (console) should be installed and aligned before the secondary wipe, and its upper surface should be higher than the ground.

(5) The installation of the instrument box (board) shall meet the following requirements:

It should be vertical, flat and firm;

The perpendicularity is 3 mm, and when the height of the box (plate) is greater than 1.2 meters, the perpendicularity is 4 mm;

The permissible deviation of the inclination in the horizontal direction is 3 mm.

(6) The installation of a separate dashboard (console) should meet the following requirements:

It should be vertical, flat and firm;

The permissible deviation of verticality is 1.5 mm per meter;

The permissible deviation of the inclination in the horizontal direction is 1 mm per meter.

(7) The installation of rows of dashboards (consoles) should meet the following requirements in addition to the requirements of individual dashboards (consoles):

The allowable deviation of the top height of the two adjacent discs (operating table) is 2 mm;

When there are more than two connections between the discs, the maximum allowable deviation of the top height is 5 mm;

The allowable deviation of the flatness of the front of the disc at the seam of the adjacent two discs (operating table) is 1 mm;

When the connection between the discs is more than 5 places, the maximum allowable deviation of the flatness of the disc front is 5 mm;

The gap between the indirect seams of the two adjacent discs (operating tables) is not more than 2 mm.

J. Cable and conduit laying method

(1) Before laying the cable (wire), the appearance and conduction inspection should be done, and the insulation resistance should be measured with a DC 500 volt megohmmeter, and the resistance value should not be less than 5 trillion ohms;

(2) The line should be laid in a centralized manner according to the shortest way, horizontal and vertical, neat and beautiful, and should not be crossed.

(3) The line should not be laid in a place that is susceptible to mechanical damage,

(4) Areas with corrosive medium discharge, humidity, and strong magnetic and electrostatic field interference. When it cannot be avoided, protective or shielding measures should be taken.

(5) The line should not be laid in a position that affects the operation and obstructs the maintenance, transportation and pedestrian movement of the equipment.

(6) When the ambient temperature around the line exceeds 65°C, heat insulation measures should be taken, and fire prevention measures should be taken when the fire source is likely to cause fire.

(7) The line should not be laid in parallel above the high-temperature process equipment and pipelines and below the process equipment and pipelines with corrosive liquid medium.

(8) The distance between the line and the surface of the thermal insulation layer of the thermal insulation equipment and pipeline should be greater than 200 mm, and the distance between the surface of other process equipment and pipeline should be greater than 150 mm.

(9) When the overhead laying line enters the indoor from the outside, there should be waterproof measures.

(10) There should be an appropriate margin at the terminal junction of the line and the expansion joints and settlement joints passing through the building.

(11) There should be no intermediate joints in the line, and when it is unavoidable, the wiring should be in the distribution box or junction box, and the joints should be crimped; The compensation wire should be crimped. Coaxial cables and high-frequency cables should use special connectors.

(12) When laying the line, it is not advisable to drill installation holes on concrete beams and columns, and the anti-corrosion layer should not be destroyed in the anti-corrosion workshop.

(13) After the line is laid, the line should be calibrated and marked, and the insulation resistance should be measured according to the requirements of Article 1.

(14) When measuring the insulation resistance of the line, disconnect the connected instrumentation equipment and components.

(15) The laying methods of other cable lines and pipeline ducts shall be implemented in accordance with the relevant requirements of the GB50168.

(4) System commissioning

1. The conditions that should be met for debugging

(1) All the equipment of the BA system, including various valves, actuators, sensors, etc., have been installed, and the wiring and wiring all meet the requirements of the design drawings.

(2) The controlled equipment of the BA system and its own system are not only installed, but also the commissioning of the single or its own system is completed, and the test data of its equipment or system meet the process requirements of its own system, for example, the chiller in the air-conditioning system is running normally, and its cooling capacity, the inlet and outlet pressure of the chilled water, and the temperature of the inlet and outlet water meet the technological requirements of the air-conditioning system.

(3) Check that the linkage between BAS and each system, information transmission and line laying meet the design requirements.

2. Routine inspection

(1) Check and check the number of equipment, plug-in location, component structure and defects according to the drawings and equipment configuration data.

(2) Check the installation of the equipment according to the above-mentioned installation requirements and product technical requirements.

(3) Check the connection and marking of the equipment line.

(4) Check the grounding installation of equipment and systems.

3. Debugging of power supply equipment

(1) Check the model, specification and protection device of the power supply equipment

(2) Check the insulation resistance between the power supply device, the power supply end and the chassis

(3) Main debugging content

Inspection and commissioning of protective devices

Check the power supply input and power supply voltage

Frequency stabilization, voltage stabilization of power supply equipment, automatic switching function test of uninterruptible power supply.

4. Debugging of input and output points

(1) Digital input debugging:

Check the signal level:

The dry contact input confirms its logical value according to the equipment specification and design requirements.

The pulse or accumulation signal shall confirm that the number of pulses generated is consistent with the number of received pulses according to the equipment manual and design requirements, and conform to the minimum frequency, minimum peak voltage, minimum pulse width, maximum frequency, maximum peak voltage, and maximum pulse width specified in the equipment manual.

Voltage or current signals (active and passive) are confirmed according to the requirements of the equipment manual and design.

Movement test:

According to the requirements of the above different signals, all the measurement points are tested by program mode or manual mode, and the value of the measurement points is recorded.

The special function check is carried out according to the functions specified in this project, such as digital signal input and normal, alarm, line, open circuit, line short circuit detection, etc.

(2) Digital output debugging:

Check the signal level

The output of the relay switching quantity is 0N/OFF: confirm the specified voltage, current range and allowable working capacity of the output according to the equipment manual and design requirements.

Check the characteristics of the output voltage or current switch: the voltage or current output meets the requirements of the equipment use book and design.

Movement testing

Test all digital outputs in program mode or manual mode, record the test value and observe whether the working state of the electrical control switch of the controlled equipment is normal; if the controlled unit is powered by the test operation normally, you can observe whether the controlled equipment is running normally under the normal power supply of the controlled equipment.

(3) Analog input debugging:

The inspection of the input signal is carried out according to the equipment manual and design requirements to confirm whether the type, range (capacity) and set value (design value) of the active or passive analog input comply with the regulations, and the usual sensors are checked in the following order:

Inspection of temperature, humidity, pressure, and differential pressure sensors.

Confirm whether the power supply voltage, frequency, temperature and humidity of the equipment are consistent with the actual situation according to the requirements of the product description.

Confirm whether the internal and external cables of the sensor are correct according to the requirements of the product manual.

According to the actual situation of the site, according to the input range specified in the product manual, the analog input signal is connected to the sensor end or DDC side to check its output signal, and calculate to confirm whether it is consistent with the actual value.

Analog input accuracy test: use program and manual methods to test each test point, read three measurement points (10%, 50%, 90% of the full scale) within its mileage range, and the test accuracy should meet the requirements specified in the instruction manual of the equipment.

(4) Analog output debugging:

According to the equipment instruction manual and design requirements to determine whether the type, range (capacity) and set value (design value) of the analog output are consistent, the commonly used dampers and electric valve drivers can be checked and debugged in the following order:

According to the requirements of the product manual, confirm whether the power supply, voltage, frequency, temperature and humidity of the equipment are consistent with the actual situation.

Manual check: First switch the drive to manual mode, then turn the hand crank to check whether the stroke of the drive is in the range of 0-l00%.

After confirming that the manual inspection is correct, simulate the input signal or output AO signal from the DDC according to the requirements of the product manual on the spot to confirm whether the driver operation is normal.

Action test: Scan all AO test points point by point by program or manual control, record the value of each measurement point, and fill in the value in Appendix 1, and observe whether the working status and operation of the controlled equipment are normal.

Special function inspection: Check according to the functions specified in this project, such as maintaining output function, accident safety function, etc.

All DO, DI, AO, AI points of this project shall be carried out according to the number and requirements of monitoring points specified in the monitoring point table or commissioning plan.

5. Single debugging

(1) The inspection and debugging of the DDC controller mainly includes the inspection of the special cable and wiring, the confirmation of the input and output voltage and power indicator, and the debugging of the A/D conversion accuracy.

(2) The inspection and debugging of the central controller mainly includes the inspection of special cables and wiring, the confirmation of the input and output voltage values and power indicators, the inspection of the computer operating system, the testing of computer hardware (main frequency, memory, etc.), the inspection and removal of computer viruses, and the loading of configuration data.

(3) Open data communication and call up the system maintenance function.

(4) Debugging of various redundant configurations. Manual simulation is used to confirm the automatic switching and transfer functions.

(5) Debugging of process I/O. Apply or take out the digital/analog signal in the terminal cabinet, and call it out in turn on the central controller, and check the parameters such as instrument signal, range, alarm setting, etc., and the adjustment point should be evenly selected within the range, and its number is not less than 3 points.

6. Debugging of application software and system functions

(1) The basic debugging method of the monitoring point

1. The signal transmission function is debugged, and the test signal is applied at the signal generating end, and the point data should be able to be read on the workstation.

2. Start-stop function debugging, on the central controller, the monitored electromechanical equipment (water pumps, cold and heat source equipment, air conditioning units, supply and exhaust fans, elevators, etc.) is directly started and stopped control and debugging, as well as the start-stop control and debugging according to the time program table.

3. Debugging of equipment fault alarm function, setting alarm points and alarm data for the monitored electromechanical equipment, applying test signals at the system signal generation end, and debugging alarm signals and alarm points.

4. Debugging of continuous control function, setting the parameters of the DDC controller and the direction of action of the actuator. The signal is applied at the signal generation end of the system, and the adjustment parameters, control logic, and component interlocking functions are debugged according to the system design requirements, and the actuator is manually debugged from zero point to the end point of the whole process and the full stroke operation response time.

5. Debugging the operation function, setting the constant system items of the operation formula in the control software and management software, and applying the signal at the signal generation end of the system to debug the calculation function and accuracy

6. Interface debugging: According to the system function requirements, the internal control system or equipment of the third-party equipment integrated with the communication interface will apply signals point by point from the sending direction to the receiving direction, and the receiving direction will confirm them one by one

(2) Debugging of the secondary monitoring function of the double-working ice storage air-conditioning system, the specific method is as follows:

1. Install the communication interface software of the double-working ice storage air-conditioning system, and check whether the interface equipment provided by the air-conditioning system is working properly. Whether the interface conversion device on the side of the building automation system is working properly.

2. Open the compiled monitoring point database and dynamic graphical interface, and check whether all system parameters (temperature, pressure, flow, valve status, unit status, alarm information, setting parameters, etc.) uploaded through the interface are correct, and whether the type and range of system parameters are consistent with the instructions provided by the air conditioner manufacturer.

3. If the air-conditioning manufacturer provides the monitoring host of the dual-condition ice storage air-conditioning system, check whether the parameter values displayed by the central management machine of the building automation system correspond to the actual values of the air-conditioning monitoring host. Whether the detection value of the on-site sensor correctly reflects the actual value should be debugged and inspected by the air conditioning manufacturer.

4. On the graphical interface of the building automation system management machine, all the switching output points are forced to open and close, and confirm whether the relevant butterfly valves, water pumps, etc. are normal. Force all analog output points to output different signals to confirm whether the relevant motorized valve is working properly and whether the position adjustment follows the change. Modify the setting value of the operating parameters of the system to confirm whether the corresponding parameters of the air conditioning control system are changed accordingly. (The debugging content should be determined according to the parameter content and control authority provided by the air conditioner manufacturer)

5. The building automatic control system management machine sends a system start signal to observe whether the linkage of the ice storage and air-conditioning system under double working conditions is correct, and after the system starts to run for a period of time, the building automatic control system management machine sends a system stop signal to observe whether the linkage of the ice storage and air-conditioning system under double working conditions is correct. (The order of equipment linkage should be determined according to the linkage equipment and sequence description provided by the air conditioner manufacturer)

6. The building automatic control system management machine will issue a system operation mode change instruction to observe whether the double-working ice storage and air-conditioning system automatically adjusts the operation status of each equipment according to the instructions and enters the operation modes of single refrigeration, single ice making, ice melting, ice melting + refrigeration, etc. (The automatic control of the operation mode should be determined according to the operation mode plan description provided by the air conditioner manufacturer)

7. In the case of more than two refrigeration source equipment, stop some air-conditioning equipment, and observe whether the system can automatically stop one or more refrigeration source equipment according to the load change of the air-conditioning system, and automatically link water pumps, cooling towers, butterfly valves and other equipment. After that, the suspended air-conditioning equipment will be restored, and the system will be observed to see if one or more refrigeration equipment can be restored, and the water pump, butterfly valve, cooling tower and other equipment will be linked in the order of arrangement.

8. Reduce the load of some air-conditioning equipment without changing the number of air-conditioning units and pumps, and observe whether the air-conditioning inverter pump system in the high and low areas can automatically adjust the operating frequency and keep the water supply pressure of the refrigerated water supply pipe within a stable set range.

9. The commissioning of the baseload refrigeration system, electric heat storage boiler and electric boiler system is basically similar to the above method.

(3) Heat exchanger commissioning

1. Check whether all the electrical components of the control cabinet and control valve of the heat exchange circulating pump are damaged, whether the internal and external wiring is correct, strictly prevent the strong current power supply from entering the DDC, if you need 24VAc, you should confirm that the wiring is correct and there is no short circuit fault.

2. According to the requirements of the monitoring point table, check whether the temperature, pressure sensor, electric valve, water flow switch and other equipment installed on the air conditioning water pipeline are correct and whether the wiring is correct, and whether the type and range of input and output signals are consistent with the settings.

3. Confirm that the circulating water pump is operating properly in a non-BAS controlled state in the manual position.

4. After confirming that the DDC is powered and the main power switch is turned on, observe whether the status of the DDC controller and each component is normal.

5. Use a laptop or portable detector to check all temperature and pressure values, and check whether the values are correct. Record whether the status of all switching input points is normal. Forcibly turn all switching output points on and off to confirm that the relevant pump is operating correctly. Enforce all analog output points and output signals to confirm whether the relevant electric control valve is working properly and whether the position adjustment follows the change.

6. Open the electric control valve and put the heat exchanger into the heat exchange. The water supply temperature of the secondary side air conditioner should change with the change of the water supply temperature setting, and after a certain period of time, it should be stable near the water supply temperature set value. If the speed of water supply temperature tracking the set value is too slow, the proportional amplification effect of PID adjustment can be appropriately increased; if the deviation between the water supply temperature and the set value is large after the system is stable, the integral effect of PID adjustment can be appropriately increased; if the water supply temperature fluctuates periodically up and down the set value, and its deviation exceeds the range, the differential effect should be reduced or canceled first, and then the proportional amplification effect should be reduced until the system is stable.

(4) Commissioning of single equipment of air handler (cooling and heating control).

1. Check whether all the electrical components of the air conditioner control cabinet are damaged, whether the internal and external wiring is correct, strictly prevent the strong current power supply from entering the DDC, if you need 24VAc, you should confirm that the wiring is correct and there is no short circuit fault.

2. According to the requirements of the monitoring point table, check whether the position and wiring of the temperature and humidity sensors, electric valves, dampers, differential pressure switches and other equipment installed on the air conditioner are correct and whether the type and range of input and output signals are consistent with the settings.

3. Confirm that the fan is operating properly in a non-BAS controlled state in the manual position.

4. After confirming that the DDC is powered and the main power switch is turned on, observe whether the status of the DDC controller and each component is normal.

5. Use a laptop or portable detector to check all temperature, humidity, and wind pressure values, and check whether the values are correct. Record whether the status of all switching input points is normal. Forcibly turn all switching output points on and off, and confirm whether the relevant fans, dampers, and valves are operating correctly. Enforce all analog output points and output signals to confirm whether the relevant electric valves (cold and hot water control valves) are working properly and whether their position adjustment follows the change.

6. When starting the air conditioner, the fresh air door, return air door, exhaust air door, etc. should be interlocked and opened, and various adjustment controls should be put into work. After the air conditioner is started, the return air temperature should change with the change of the return air temperature setting, and after a certain period of time, it should be stable near the return air temperature setting value. If the return air temperature is too slow to track the setpoint, it can be appropriately raised

If the system is stabilized, the deviation between the return air temperature and the set value is large, the integral effect of PID adjustment can be appropriately improved; if the return air temperature fluctuates periodically up and down the set value, and the deviation exceeds the range, the differential effect should be reduced or canceled first, and then the proportional amplification effect should be reduced until the system is stable. The principle of PID parameter setting is: firstly, to ensure the stability of the system, secondly, to meet its basic accuracy requirements, the parameter settings should not be excessive, the system oscillation should be avoided, and there is a certain margin. When the system is not stable after commissioning, it should be carefully examined and excluded whether there are any factors in the mechanical or electrical installation that hinder the stability of the system.

7. When the air conditioner stops running, the fresh air valve, exhaust damper, hot and cold water control valve, humidifier, etc. should be returned to the fully closed position.

8. Confirm the requirements of other functions and interlocking and linkage program control specified in the design drawings, technical data, software and debugging outline of the product supplier.

9. The variable air volume air conditioner should confirm that the air volume and wind of the air handler change accordingly with the speed of the fan according to the requirements of the control function frequency conversion or gear change. When the wind pressure or air volume is stable at the design value, the fan speed should be stable at a certain point, and the corresponding wind pressure or air volume when 30%, 50% and 90% of the fan speed is recorded according to the requirements of the design and product manual.

10. If necessary, the opening limit setting of fresh air damper, exhaust damper and return air damper should meet the percentage requirements of the air conditioning process.

The commissioning of constant air volume, variable air volume new fan, and supply and exhaust fan is basically similar to the above method, and some functions are omitted according to the equipment monitoring scheme.

(5) Commissioning of water supply and drainage system

1. Check the electrical control cabinet of all kinds of pumps, and the wiring between the DDC and the DDC is correct according to the design monitoring requirements, and strictly prevent strong current from entering the DDC.

2. Check the position of the water level sensor or water level switch installed in various water tanks and pools, as well as the temperature sensor, water quantity sensor and other equipment according to the requirements of the monitoring point table, and the wiring is correct, and its installation should meet the requirements of the specification.

3. Confirm that all kinds of controlled equipment such as pumps are in normal operation under manual control.

4. Use a laptop or portable detector to check whether all switching input points are in normal condition. Forcibly turn all switching output points on and off, and confirm whether the relevant water pump is operating correctly and whether the water flow switch is operating correctly. For the pump controlled by frequency conversion, it is also necessary to check whether the operating frequency or power input signal is correct, and forcibly change the output point signal of the product rate control to confirm whether the operating frequency of the relevant pump follows the change.

5. Set the pump control to BA automatic control mode, inject water into the pool water level and drain water, confirm whether the pump is put into operation according to the water level switch action to inject water (or drain), whether the pump will be automatically stopped when the pump is reached and the water level is reached, and whether it meets the requirements of design, monitoring point and linkage chain.

(6) Substation and distribution system

1. Install the communication interface software of the substation and distribution system, and check whether the interface equipment provided by the substation and distribution system is working properly. Whether the interface conversion device on the side of the building automation system is working properly.

2. Open the compiled monitoring point database and dynamics

In the graphical interface, check whether all system parameters (current, voltage, power, power factor, frequency, switching status, trip alarm, etc.) uploaded through the interface are correct, and whether the type and range of the system parameters are consistent with the instructions provided by the substation and distribution equipment manufacturer. (The on-site setting and correction of the parameters of the substation and distribution system shall be responsible for the manufacturer of the substation and distribution equipment)

3. The debugging method of the elevator system is similar, but the content and function debugging of the monitoring point should be determined according to the system parameter content and operation mode description provided by the elevator manufacturer.

(7) Lighting system

1. Check all kinds of lighting boxes, and the wiring between them and the DDC is correct according to the design monitoring requirements, and strictly prevent strong current from entering the DDC.

2. Check the illuminance sensor and the lighting box according to the requirements of the monitoring point table, and the installation should meet the requirements of the specification.

3. Confirm that all kinds of controlled lighting circuits are in normal operation under manual control.

4. Set the lighting box in the BA control mode, and test whether the lighting control input is normal and whether the lighting status feedback is correct according to the debugging method of the general monitoring point.

5. Set the illuminance setting value of the on-on lighting, check whether the relevant lighting is turned on correctly when the light is weakened at night, and whether the relevant lighting is turned off correctly when the light is enhanced during the day.

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The PPT scheme in the article was all gifted, a total of 400 PPT, 6 sets of complete drawings, 316 industry standard specifications and construction drawing sets, 60 word schemes, 20 construction organization designs, 20 bills of quantities (with reference prices), 162 drawings and materials, 120 VISIO tiles and topology diagrams, project management and construction plans, 68 practical excel sheets, bidding plans and construction organization design, etc.