HVAC Chiller trouble Shooting chappter 1 hvactech1 blogspot.com

            CHILLER FALUTS AND TROUBLE SHOOTING

CHILLER TRABLE SHOOT   

                                                

           

Today Topic is High pressure Discharge and Low pressure Discharge

1. High pressure Discharge?

2. Low pressure Discharge ?

High pressure Discharge

Fist step is what to Check in unit step by step 

1. Flowing Build up of minerals on condenser tubes (water cooled chiller) Caused by bad water treatment?

2. Dirty Condenser ( Air cooled chiller )

3. Reduction of air flow ( Air cooled chiller )

4. Reduction of water flow in condenser ( water cooled chiller )

5.High return condenser water temperature ( water cooled )

6. Discharge shut of valve partially closed ( Both wanted/Air cooled chiller)

7. High ambient air temperature (Air cooled)

8. Over Charged with refrigerant?

9. Non Condensable in refrigerant loop 

10. Faulty pressure switch 

This 10 Steps To Checked The Unit So Now 

How to solve this 10 problems ( what to do?

1.improve water treatment regime, clean condenser tubes 

2. Clean surfaces of condenser tube and fins 

3. Check for debris blocking air flow.

    Check condenser fan are working 

    Check for high compressor discharge pressure .

Low sub cooling, High compressor discharge temperature

4. Check by pass valve position, condenser pump are working strainers arenite blocked

5. Check cooling tower fan is working 

 Check cooling tower by pass valve position

6. Check valve position and open if needed

7. Ambient air above condenser design capabilities 

8. Check pressure temperature and sight glasses around system compare and remove excess

Check for high discharge temperature and pressure 

9. Parge non condensable check high discharge temperature

pressure and high discharge pressure with normal super heat 

10. Compare data logs, Swap sensor and test 

This 10 steps u follow and then solve the unit problem 

Now we go to Low pressure Discharge

How to check Low pressure Discharge there is 5 steps 

1. Suction valve partially closed 

2. Under charged with refrigerant

3. Low ambient air temperature (air-cooled)

4. Low suction pressure 

5. Dirty or obstructed evaporator

Solve This How To Fix 

1. Check valve position and open

2. Check Temperature, pressure and sight glasses 

Check for leakes, repair and top up as required 

Check low suction pressure, high suction super heat 

Medium high discharge temperature

3. Ambient air below condenser design capabilities 

4. Covered in next side 

5. Check evaporator tubes, consider cleaning 

check for low compressor discharge pressure and low super heat

HVAC RELATED MORE INFORMATION CLICK HER

HVAC  Types of Compressor