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Combined dryer

Installation,

operation,

commissioning and maintenance instructions

HANGZHOU JIALONG AIR

EQUIPMENT CO.ÿLTD
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Table of contents

General Safety Principles.................................................................................. 1

Precautions before use.................................................................................. 1

1. Overview.................................................................................................. 2

2 Installation Guide................................................................................................. 4

4 Maintenance and Care.................................................................................. 9

ÿPossible causes of abnormal operation and failure of the dryer: ...................................... 13

ÿAdsorption dryer partial fault diagnosis guide.................................................. 15

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Hangzhou Jialong Gas Equipment Co., Ltd. Manual

General safety rules

The combined compressed air dryer is a device with a pressure vessel, so the working pressure must not exceed

The maximum working pressure is stated on the nameplate.

The combined compressed air dryer is powered by electricity. Please install it according to national electricity standards.

When performing any electrical inspection or equipment repair, always disconnect the power supply.

Precautions before use

Combined compressed air dryer is a high-precision equipment. The equipment's internal refrigeration system is tightly packed with components,

Pipes and control system electronic components must not be subjected to large shocks and vibrations.

The vehicle speed must not be too high. When the road conditions are bad, you must slow down to avoid unnecessary losses.

When loading, unloading, moving and installing this equipment, no matter it is packed or unpacked, you need to use a forklift to

The bottom of the box or equipment should be moved under load, and it is forbidden to move the equipment under load at the compressed air inlet and outlet pipes.

The cooling air inlet of the combined compressed air dryer is 1.5m away from the wall, and the air inlet and exhaust of the two devices are 1.5m away from the wall.

The air outlets should not be facing each other and the ambient temperature should not be higher than 38ÿ.

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1 Overview

Principle and process flow

Compressed air first enters the oil removal filter to remove most of the liquid water and oil (oil removal accuracy

0.01ppm), and then enter the precooler in the cold dryer to exchange heat with the compressed air after cooling and drying

The temperature of the dry compressed air increases and the temperature of the compressed air entering the evaporator decreases.

Remove some of the water, cool it down to room temperature, and reduce the workload of the evaporator.

Heat exchange is performed to cool the compressed air to a dew point temperature of about 5°C.

The water and some impurities are condensed here, and the air and water are separated by the air-water separator, and then

The water and oil are discharged through the drainer, and the dried compressed air returns to the precooler in the dryer.

Cooling the hot and humid air can increase its temperature. At the same time, the heated dry compressed air can also

To prevent condensation in the delivery pipeline, the compressed air after freeze drying enters the dryer for absorption.

Attached drying, further removes moisture until the dew point temperature meets the requirements.

The air is then transported to the user point after passing through the dust filter to remove the dust produced by the dryer.

A portion of the compressed air is taken from the dryer outlet and enters the regeneration tower for regeneration. (Micro-heat regeneration type: regeneration gas

The dry hot air heated by the heater can use very little regeneration gas consumption to make the adsorbent

Regenerate in a shorter time.)

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Heatless combined dryer flow chart

Table 1 Standard cycle table of adsorption drying for heatless combination machine

Working period ½ cycle (35 minutes) ½ cycle (35 minutes)

ÿ ÿ III IV
time
6s 33min54s 1min 6s 33min54s 1min

Tower A Delayed regeneration charging

Tower B Adsorption delayed regeneration pressurization Adsorption

Micro-heat combined dryer flow chart

Table 2 Standard cycle table of adsorption drying of micro-heat combination machine

Working period ½ cycle (60min) ½ cycle (60min)

ÿ ÿ III IV
time 26min54
6s 30min 26min54s 3min 6s 30min 3min
s

Tower A Adsorption Delayed heating, regeneration, cooling, regeneration, charging

B tower delayed heating regeneration cooling regeneration charging Adsorption

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2. Installation Guide

Installation diagram

2.1 The combined dryer must be installed in a place where the ambient temperature is required to be higher than 0ÿ and lower than 38ÿ.

This will cause the dryer to work unstably. If the refrigeration part is an air-cooled combined dryer, it must be installed

Place it indoors with good ventilation to maintain the above environment and temperature conditions.

2.2 The combined dryer is placed in a place where the cooling air can easily pass through the condenser.

Keep at least 1 meter of space around the dryer and at least 1 meter of space above the combined dryer.

The above space is convenient for maintenance.

Warning: Poor ventilation will cause the cooling air to circulate repeatedly around the condenser, causing the ambient temperature to rise continuously.

Increase, which will make the refrigeration compressor exhaust pressure too high or overload protection, and finally the combined dryer

Stop running!

2.3 Connect the output port of the air storage tank to the combined dryer inlet filter, and connect the compressed air pipe

It is recommended to use a three-valve bypass line to connect the combined dryer outlet to the maintenance pressure

For oil-rich air compressor systems,

It is recommended to install an additional pre-filter.

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2.4 Power distribution requirements and methods

2.4.1 Set up a separate power switch; the voltage should be configured according to the value and number of phases marked on the nameplate.

2.4.2 Do not share a protection device with other equipment. The voltage fluctuation range must not exceed the voltage

10%.

2.4.3 The cables used should not be too thin or too long to avoid voltage drop;

2.4.4 The housing of the combined dryer should be reliably grounded, and the grounding wire should be connected to the bolt with the grounding mark.

2.4.5 The power supply of the combined dryer is 380/220V and the control power supply is 220V. 50Hz.

2.4.6 When connecting the power, first lead the power cord into the electrical box. Pay attention to the power supply wire and the ground wire.

Connect the power cord to the corresponding terminal, and then connect the ground wire to the terminal with the ground mark.

2.4.7 The electrical wiring may become loose during transportation. Please tighten it with a screwdriver.

WARNING: The electrical wiring connected to the dryer must comply with national and local regulations and requirements.

The voltage indicated on the machine nameplate and the wire connection must be completed by a professional electrician.

2.5 Ensure that the pipeline is located at a reasonable height and there is no excessive stress on the connection of the dryer.

Support the pipe as needed. The pipe must be installed by an experienced plumber.

2.6 The regeneration exhaust can be led from the combined dryer exhaust port to the outside through a pipe.

3 meters Increase the diameter of the pipe by one size to reduce back pressure.

2.7 There is a drain valve installed in front of the drain valve inside the dryer.

If you want to clean the filter, close the shut-off valve first.

Close the check valve and completely depressurize the drain pipe.

2.8 The cold and dry part of the combined dryer is water-cooled. Do not connect city water to the cooling water system.

Industrial circulating water or neutral water can be connected to the water condenser. The cooling water pressure is required to be 0.2Mpa~0.4

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Mpa, it is recommended to install a water filter at the cooling water inlet of the condenser.

Note: Do not arbitrarily reduce the size of the cooling water and drain pipes. They should be consistent with the dryer.

The pipe diameter of the interface should be the same as or larger than their pipe diameter to avoid excessive pressure loss of cooling water!

2.9 Storage: If storing for a period of time before installation, please follow the simple procedure below

2.9.1 Seal or wrap all components

2.9.2 Package electrical box

2.9.3 Wrapping the silencer

2.9.4 If the desiccant is not placed in the drying tower due to transportation reasons, it should be stored indoors to prevent rain.

of erosion.

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3. Startup and operation

3.1 Inspection before startup

3.1.1 Check whether the power supply voltage is normal; AC1ÿ220(1±10%)V or AC3ÿ380

(1±10%)V.

3.1.2 Check whether the air pipeline is normal. The air inlet pressure shall not exceed the rated working pressure.

The temperature does not exceed the value determined during selection.

3.1.3 Before starting the machine, the compressed air pipeline system must be purged to prevent debris from entering the dryer and

The filter affects the usage.

Note: Our company has set all the equipment components before the equipment leaves the factory, and no adjustment is required at the customer's site.

If there is any damage, please contact the manufacturer.

3.2 Operation process of combined dryer:

3.2.1 Close the air switch and turn on the power. The power indicator light (red light) on the panel will light up.

3.2.2 Manually start the dryer: Set the switch to manual position and press the start button. The dryer will start automatically.

The dryer starts automatically and the running indicator light (green light) is on, indicating that the dryer has started running.

Note: If the equipment is shut down and then restarted, the interval time must not be less than 3 minutes

3.2.3 When the dryer is pressurized to the working pressure (0.75-0.8) MPa, check the filter pressure reducing valve and butterfly valve.

The regulating pressure of the valve equipment is about 0.4MPa, and the regulating pressure of the angle seat valve and piston valve equipment is about

0.6MPa, and locked. (See filter pressure reducing valve adjustment)

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3.2.4 After observing for (5-10) minutes, the air treated by the dryer can meet the use requirements.

The low pressure gauge of refrigerant should indicate a range of (0.35ÿ0.45)MPa, and the high pressure gauge of refrigerant should indicate a range of (1.4ÿ

1.6)MPa range.

3.2.5 Open the ball valve on the automatic drain to allow the condensed water in the air to flow into the drain and be discharged through it.

Outside the machine.

3.2.6 Interlock start/stop mode: Set the switch to the interlock position.

The dryer can be automatically put into operation by the stop signal control.

Change the switch to manual position to stop the dryer.

3.2.7 Remote control mode: Set the switch to remote control mode, and the dryer will start and stop by remote signal.

When the dryer needs to be manually stopped, please set the switch to manual mode to stop drying.

The machine is running.

3.2.8 Dryer fault alarm function: When the dryer fails during operation, the equipment will automatically shut down.

Protection, the controller will output fault alarm signals including the alarm indicator of the machine is on, the dryer fault signal

Output signal to remote.

Note: After the equipment stops due to fault, you must press the stop button to exit the dryer fault alarm state.

3.2.9 When shutting down the dryer, stop supplying compressed air to the dryer and turn the switch to manual.

If the dryer is already running in manual mode, just press the stop (red) button to turn off the dryer.

Disconnect the air switch, cut off the power and control power supplies respectively, and close the equipment inlet and outlet valves after shutdown.

3.2.10 When supplying air to the equipment, the compressed air inlet and outlet doors should be opened slowly to wait for the pressure to build up.

After reaching a stable value, fully open it to prevent excessive air flow from impacting the internal components of the equipment.

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4. Maintenance and care

WARNING: Before beginning maintenance, disconnect power and depressurize the equipment.

4.1 Frequent opening and closing of the refrigeration compressor is strictly prohibited. The interval between opening and closing the refrigeration compressor should be at least 3 minutes;

4.2 Clean the outside of the dryer regularly and pay attention to the drainage of the drainer.

4.3 The refrigeration compressor should avoid long-term no-load operation;

4.4 The air-cooled condenser should be cleaned of dust and dirt regularly to avoid affecting the heat dissipation effect. (Air-cooled model)

4.5 The specific maintenance methods of water-cooled condensers are as follows: (water-cooled models)

The water filter is mainly used to prevent impurities precipitated in the cooling water from entering the condenser and causing the cooling water pipe to be blocked.

Because its filter is easily clogged by precipitated impurities, the filter should be cleaned regularly.

In order to avoid insufficient water circulation and heat dissipation, the water side of the water cooler should be cleaned regularly (depending on the

It depends on the water quality. Generally, it is cleaned once every 6 months. You can purchase our cleaning service according to your actual needs.

machine for cleaning).

4.6 When the unit is shut down, the internal parts of the cold dryer should be vacuumed and cleaned regularly.

4.7 Always pay attention to whether the drying unit is well ventilated and avoid direct sunlight and all heat sources.

4.8 During maintenance, care should be taken to protect the refrigeration system to avoid damage.

4.9 Main points for cleaning the drainer:

4.9.1 Close the ball valve in front of the drain and loosen the drain cover.

Release the compressed air in the drain.

4.9.2 Unscrew the drain cover and take out the drain core.

Clean with clean water and a soft brush. (Do not use gasoline,

Toluene, rosin water solvent cleaning)

Automatic drain cleaning diagram

4.9.3 Install the cleaned drain core into the valve body, then

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Install the drain cover and finally open the front ball valve.

4.9.4 The inverted bucket drainer should be filled with clean water before use to form a water seal before it can work.

A slight air leak is normal.

4.9.5 After using the Y-type filter at the cooling water inlet and before the automatic drain for a period of time, the filter element

Impurities will accumulate, causing the water flow resistance in front of the filter to increase, affecting the water flow and causing drainage blockage.

The filter element should be cleaned and replaced regularly. Newly installed equipment needs to be checked frequently because the pipelines are dirty.

and cleaning.

4.10 After the adsorbent is loaded and operated for a period of time, the adsorption bed sinks slightly. Check and

Replenish or replace the adsorbent. The adsorbent should be screened before loading to remove dust and make the particles uniform.

4.11 Regularly check the working condition and sealing status of each valve to see if they are in good condition.

4.12 Regularly check whether the electrical components are in good contact and frequently remove dust inside and outside the distribution box.

4.13 When the dryer is regenerating, the pressure in the regeneration adsorption tower shall not exceed 0.02MPa.

If the valve is confirmed to be fault-free, it can be considered that the muffler is clogged and the muffler should be removed.

If the blockage is serious and cannot be cleaned, the muffler should be replaced.

4.14 Filter pressure reducing valve adjustment:

Adjustment knob

The outlet pressure of the filter pressure reducing valve is not within the normal range.

Adjust the filter pressure reducing valve. Adjustment method: Pull up the filter pressure reducing valve.

Turn the knob clockwise to increase pressure, and counterclockwise to reduce pressure.

When the required pressure is reached, press the knob to lock it.

Clean the filter body of the filter pressure reducing valve to ensure air quality.

Cleaning method: Rotate and pull down the bayonet cup at the bottom of the valve body.

Use neutral detergent to clean the filter element and cup. The filter pressure reducing valve is an automatic drainage method.

The drain pipe should be installed to an appropriate location. (The filter pressure reducing valve is usually placed in the front box of the equipment).

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4.15 Plate heat exchanger cleaning:

Aluminum-magnesium alloy plate heat exchanger: high heat transfer coefficient, reducing energy consumption by about 23%. The plate heat exchanger should be cleaned regularly.

To improve efficiency and reduce energy consumption. Clean once every six months. The cleaning steps are as follows:

4.15.1 Close the manual butterfly valve at the inlet and outlet of the plate exchanger, and use the cleaning machine and cleaning agent produced by our company to clean the plate.

Cleaning 1 hour;

4.15.2 Replace the cleaning agent in the cleaning machine with clean pure water and rinse for another half an hour;

4.15.3 Use dried compressed air for purging and open the manual butterfly valve after purging.

4.16 Regular inspection and maintenance time

4.16.1 Clean or replace the filter element of the filter regulator during the first month and regularly thereafter.

Clean the exhaust muffler if the backwash pressure during the regeneration cycle is greater than or equal to

0.35bar, replace the muffler.

4.16.2 No lubricant is required in the dryer.

4.16.3 Check the automatic drain valve on the pre-filter before each shift every day.

4.16.4 Check weekly whether tower replacement, regeneration and pressure boosting are operating normally.

4.16.5 Check operating conditions, inlet pressure, inlet temperature and air flow weekly.

4.16.6 Check the muffler weekly to see if it is dirty or blocked. If the backwash pressure of the regeneration tower is too high, it means the muffler needs to be replaced.

Change.

4.16.7 Check the pressure drop of the pre-filter and post-filter weekly. If the pressure drop exceeds

0.5bar, replace the filter element. If a differential pressure gauge is installed, you can observe the indication position on it, and the pointer points to the red

Some filters need to be replaced.

4.16.8 Check the pre-filter and post-filter elements every three months to check for blockage and possible damage.

Replace as needed.

4.16.9 Close the stop valve connecting the dryer inlet/outlet every year, fully open the bypass line, and completely

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Reduce the pressure of the dryer system, open the desiccant filling port, and take samples to check the desiccant.

Oil contamination and crushing, please replace the desiccant.

4.16.10 Remove and inspect the imported pneumatic valves and regeneration exhaust valves every year, clean and replace worn valves.

Seat and seal.

4.16.11 Check the pneumatic valve cylinder for leakage or seal wear every year.

4.16.12 Perform maintenance and inspection on the control gas circuit solenoid valve every year.

4.16.13 Calibrate the dew point probe (if equipped with a dew point meter) every year.

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ÿPossible causes of abnormal operation and failure of the cold dryer part:

•High air inlet temperature •Contamination in cooling water •Cooling

water inlet temperature is too high •Cooling water pressure is lower than 0.2MPa•Cooling water

is not treated •Ambient temperature is too high •Condenser

surface is dirty •Compressed air flow exceeds rated value •Ambient temperature is too

low •Low air inlet pressure •Aftercooler or dryer automatic drain

valve is faulty •Insufficient refrigerant charge •Evaporator leaks •Air compressor suction port filter is clogged •Power

supply voltage exceeds rated value by +/-10%

If the above situation occurs, refer to the following table for troubleshooting:

Phenomenon reason Method of exclusion

1. Turn off the power;

1. The compressor circuit is
check 2.
disconnected 2. The power phase
3. Turn off the power supply and wait for 15 minutes to find the cause of the
sequence is incorrect 3. The
A. The dryer does not operate overload
thermal relay is activated 4. Various
4. Repair or replace 5. Repair
protective controls 5. The
or replace 6. Check the circuit
compressor is blocked 6. The circuit is loose or disconnected
according to the circuit diagram

1. Check whether the exhaust pressure is too high, the condenser is dirty or blocked,

1. Compressor overload 2. the ambient temperature is too high or the air intake is too large. Repair or replace

the relevant parts according to the corresponding reasons.

B. The dryer stops shortly after starting Lack of refrigerant 3. Low
2. Repair the leak and add refrigerant 3. Check the
pressure too low 4.

Expansion valve blocked hot gas bypass valve, adjust or replace 4. Repair or replace

1. Incorrect wiring 2. Voltage 1. Check the circuit according to the wiring

C. The compressor cannot start too low 3. Relay or diagram 2. Check the power supply

contactor not closed 4. Phase loss and correct it 3. Check the cause and replace or

repair it 4. Check the power supply

1. Low voltage or three-phase voltage imbalance 2. 1. Check if the voltage is within the range of +/-10% of the nameplate voltage.
2. Check the circuit

Other electrical equipment is connected to the

diagram and check other electrical equipment connected to the protector. 3.
D. The compressor starts and stops overload protector Check the
repeatedly due to overload
3. Overload protector failure 4. Exhaust
protection current value and replace it. 4. Refer to
pressure is too high 5. Short
F1-8. 5. Check the resistance
circuit between windings 6.
value and replace the compressor. 6. Check the
Thermal relay contacts are stuck
current setting value and replace it.

1. Check that the voltage is within +/-10% of the nameplate voltage 2. Refer to B
1. Voltage is too high or too low 2.
and C 3.

E. Relay burnt out Repeated start and stop

Select the appropriate relay
3. Relay specifications do not meet 4.
4. Select the correct mounting base
Improper mounting base

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1. Excessive refrigerant 2. Air 1. Release part of the gas, or refill after vacuuming. 2. Find the cause

in the refrigeration system 3. Dirty and repair . 3. Clean. 4. Lower the

condenser 4. Ambient ambient

temperature too high 5. Faulty temperature, or relocate the dryer . 5. Repair or replace. 6. Replace.
F. Exhaust pressure is too high
condensing pressure switch 6. Faulty fan 7. Swap any two of the

motor 7. Incorrect fan rotation three phase

direction 8. Faulty cooling water flow control lines. 8. Adjust, repair or replace.

valve

1. Too little refrigerant 2. The 1. Leak detection and refrigerant addition

H. Exhaust pressure is too low compressor is not working properly 3. 2. Repair or replacement 3.

The condenser pressure switch is faulty 4. Repair or replacement 4.

The cooling water flow regulating valve is faulty Adjustment, repair or replacement

1. Loose connection 2. 1. Reinforce the connection,

Bent fan blades 3. Damaged etc. 2. Replace or calibrate

J. The dryer is running too noisy
fan motor bearing 4. Refrigerant backflow 3. Replace 4.

5. Oil shortage in compressor Check the expansion valve, adjust or replace. 5. Check

the oil level and add lubricating oil

1. Open the valve to remove the

K. Frost on the liquid pipeline 1. Faulty high pressure side maintenance valve 2.
Blockage of the dry filter blockage 2.

L. Frost on the return air pipe 1. Expansion valve or hot gas bypass valve out of control Replace 1. Adjust the hot gas bypass valve to raise the return gas pressure
to the normal

M. The temperature of the upper part of the condenser is

1. The amount of refrigerant is too range 1. Check for leaks or add
too high
small 2. The compressor efficiency is not high refrigerant 2. Repair or replace

1. Refrigerant leak 2. 1. Leak detection and repair

Clogged filter drier 3. Dirty condenser 2. Replacement

4. Air in the system 5. 3. Clean the condenser 4.

Inefficient compressor 6. Failure Find the cause, repair and remove the air 5. Repair or

of evaporator pressure control replace 6. Repair and adjust

element 7. Poor insulation 8. Too high air intake the hot gas bypass valve or expansion valve as needed 7. Rewrap 8.
N. The equipment is running but the 9. Reduce
air outlet temperature is high.
Too small dryer capacity the intake volume 9.
Note: When the air intake is low, the
outlet air temperature gauge reading 10. Too high ambient Add a dryer or replace with
may be higher than the actual
temperature 11. Too high air intake a larger model 10. Try to reduce the ambient
temperature.
temperature 1. Low air intake temperature or relocate the dryer 11. Reduce the intake temperature 1.

pressure 2. Incorrect piping 3. Increase the intake pressure 2.

Too high air intake 4. Too Increase the pipe size and

small equipment handling correct the pipe as needed 3. Reduce the load 4. Add equipment or

capacity 5. Too much water replace with a larger

P. The equipment is running but the pressure drop is too

large in the equipment 6. Frozen evaporator model 5. Check the drain and repair or replace

7. Dirty air system as needed 6. Adjust the hot gas bypass valve 7. Backwash

1. Check the return air temperature at the evaporator outlet or turn off the
Q. The equipment is running but the air 1. Freeze dryer and find out the cause after it frosts. Adjust the system under no-load
flow is unstable or zero condition so that the compressor does not
2. Gas flow in the pipeline is restricted
frost. 2. Make corrections as needed.

R. Freezing of evaporator 1. Hot gas bypass valve out of control 1. Repair or Replacement

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ÿAdsorption dryer partial fault diagnosis guide

Phenomenon Causes Troubleshooting

1. Regeneration flow is too low 2. 1. Re-adjust the regeneration gas volume 2.

Inlet pressure is low 3. Water Recalculate and set the purification pressure 3. Check the

content is too high 4. Inlet pre-filter drain valve 4. Check the compressor outlet 5.

A. Dew point temperature rises

temperature is too high 5. Desiccant Check the compressor outlet exhaust

is contaminated by oil 6. Dew point volume Depressurize the dryer and check the desiccant 6. Recalibrate 1. Reset the
temperature value or
indication is incorrect
replace 2. See #A.1 3.

1. Temperature failure or setting too low 2. See #C.1 4. Check the circuit Note: 1. During the

Regeneration flow rate too low 3. regeneration process, the

B Regeneration temperature is too low
Regeneration tower back pressure too pressure in the tower is 0

high 4. Power supply problem MPa. Any backwash

pressure will cause poor regeneration of the system.

2. To detect leakage during the regeneration process, close the purge regulating valve. If there is still airflow, it indicates that the check valve is leaking.

1. Muffler is clogged 2. Check 1. Replace the muffler 2.

C. The backwash pressure of the regeneration valve leaks (see note 2) 3. Regeneration flow is too Repair or replace the defective check valve 3. Check and reset
tower is large
the purge pressure 4. Replace with a larger size or remove
too high (see note 1) 4. Regeneration exhaust pipe
the obstruction
is blocked 1. Check valve leaks 2. Inlet valve

does not switch 3. Regeneration 1. See Note 2 2. See #F.1 to

D. The flow through the muffler is too large exhaust valve remains open 4. Booster F.4 3. Replace and repair in time 4. Check

valve cannot be closed 1. Pipeline pressure is too the control circuit, repair or replace the

low, both inlet valves are closed 2. Low booster valve 1. Open the inlet valve manually by turning the shaft on the

pressure protection switch is set too high 1. Inlet valve valve cylinder 2. Turn the pressure switch to lower the set point 1. Check the
E. No gas passes through the dryer
does not switch corresponding

2. Abnormal pilot pressure 3. Cylinder leaks or is control solenoid valve and replace it as needed 2. Clean or

clogged replace the control air line filter element 3. Repair or replace the cylinder 1.

F. Tower replacement failure alarm

Replace the desiccant support filter 2. Check the inlet air volume

3. Check and reset the purge pressure

1. Desiccant support filter is clogged 2. Exceeding 4. Check the pilot air line or solenoid valve and

flow 3. Regeneration flow replace it as needed 5. See #D.4 1. See #G.3 2.

G. The pressure drop of the dryer is too large is too high 4. Regeneration Reset the appropriate purge pressure 3. Check the

pneumatic valve remains open 5. Booster valve regeneration check valve and replace it as needed 1. Thoroughly check the system

remains open 1. Regeneration gas and high dew point

valve cannot be opened 2. Regeneration setting 1. See G.3 2.

H. Dryer cannot purify gas valve is closed 3. Regeneration See D.4 3. Repair or replace Replace 1. Check and

check valve is clogged calculate the purge pressure and reset it 2. Reset the appropriate purge

I. High dew point alarm 1. Check the alarm situation 1. Regeneration pressure 3. Increase the boost time period

exhaust valve remains open 2. Boost valve

J. The tower cannot be pressurized failure 3. Valve failure 1. Low

inlet pressure 2. Purge

pressure too low 3. Boost

K. The tower cannot be fully pressurized time too short

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Hangzhou Jialong Gas Equipment Co., Ltd.

HANGZHOU JIALONG AIR EQUIPMENT CO.ÿ
LTDAddress : No. 168 , Wuxing Village, Qiaosi
Street, Yuhang District,
HangzhouTel :

0571-85365111Fax : 0571-85365000Zip
Code: 310004E -mail: hzjialong2000@163.com Http: www.jialongequip.com.cn

Service hotline: 400-103-8600