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 

HVAC Types of Compressor

WHAT IS AIR COMPRESSOR

                                AIR COMPRESSOR                                                    

1. A compressor is a mechanical device that increases the pressure of gas or air by reducing its volume 

2. Compressors are similar to pumps both increase the pressure on a fluid and both can transport the fluid through a pipe 

3. As air or gases are Compressible, The compressor also reduces the volume of air or gas

Different types of Compressor 

1. Reciprocating Compressor 

2.  Rotary compressor 

3.  Scroll Compressor 

4.  Screw Compressor 

5.  Centrifugal Compressor 

1. How to work Recipocating Compressor?

Recipocating Compressor use piston driven by a crank shaft.

They can be either stationary or portable, Can be single or multi staged and can be driven by electric motors or internal combustion engines 

2. How work  Rotary compressor ?

             

                         Rotary compressor 

These compressors are not of reciprocating nature there fore does not have any pistons and crankshaft.

Instead these compressors have screws,vanes scrolls, and other devices which rotate and thus compressor air or gas 

The rotary compressor can be divided into two types one has blades or vanes that rotate with the shaft.

The other type has the blade which remains stationary and as part of the compressor housing assembly 

3. How work scroll compressor? 

A scroll compressor has one fixed scroll which remains stationary and another moving or orbiting scroll that rotates through the use of swing link.

When this happens the pockets of air or gas between the two scroll are slowly pushed to the center of the two scrolls, Causing the reduction of the volume of air or gas.

4. How work screw compressor?

The screw compressor uses a pair of helical rotars, Where it traps and compressors the air or gas as the rotors revolve in the cylinder.

The male rotor and the female rotor are built inside the cylinder.

5.How to work Centrifugal Compressor?

                 Centrifugal Compressor

Centrifugal Compressor is a usually used in large capacity of Compression system.

In this compressor, the air or gas is moved in a circular motion that known as centrifugal force

An impeller which is a disk with radial blades spins rapidly inside this housing causing the gas to gain velocity 

Some Related Centrifugal pump Basic Qusition and Answers 

1. Which pump is used for High pressure?

(A) centrifugal pump 

(B)  Reciprocating pump 

Answer is (B) Reciprocating pump 

2. In Centrifugal pump Bearing is fitted in?

(A) Bearing Housing 

(B) Casing 

(C) None of these 

Answer is (A) Bearing Housing 

3. Which is not a part of Centrifugal pump?

(A) Piston 

 (B) impeller 

Answer is (A) Piston 

4. In Centrifugal pump Bearing lubrication done with?

(A) oil 

(B) Both 

(C) Grease 

Answer is (B) Both 

5. Why we use pumps in Industry?

(A) for Compressor the Liquid 

(B)  Move Liquid one place to other place 

Answer is (B) Move Liquid one place to other place 

6. Centrifugal pump use for.........flow rate?

(A) High flow rate 

(B) Low Flow rate 

Answer is (A) High flow rate 

7. Single stage Centrifugal pump Has ....Nos of impeller

(A) Two 

(B) Three 

(C) one 

Answer is (C) one 

8. In Centrifugal pump Leakage from shaft and Sleeve prevent by?

(A) Gland 

(B) Mechanical seal 

(C) Both 

Answer is (C) Both 

9. Which is not a rotating part in centrifugal pump?

(A) impeller 

(B) Shaft 

(C) Casing 

Answer is (C) Casing 

10. Which stage pump used for boiler feed water?

(A) single stage pump 

(B) Multi stage pump 

Follow us on Facebook https://www.facebook.com/1HVAC-TYPES-of-Chiller-241295560133529/

Follow us on Insta https://www.instagram.com/p/Bu0geFxFkjM/?utm_source=ig_share_sheet&igshid=196gl45ucr6mp

More HVAC RELATED  video Click here 

https://youtu.be/CKbUJ3J4l9Q Subscribe My Chaneel dnt forget frnds there is a new update videos...

WHAT Is Heat Recovery

H.R.U HEAT RECOVERY 

                                         

HEAT RECOVERY (HVACTECH)                                         

Physical Construction Requirement

1. Plate heat exchanger 

2. Cooling coil

3.  Heating element 

4.  Supply air fan 

5.  Bag filter 

6.  Fresh air entry 

7.  Pre filter 

8.  Return air entry 

9.  Exhaust air fan 

HEAT RECOVERY AHU 

Plate Heat Exchanger type 

1. Plate heat exchangers are the preferred option in ventilation system 

Where any circulation of air is undesirable 

2. The incoming and out going air stream are        completely isolated and no moisture or odors can be transferred 

Technical Requirement 

1. Ambient temperature :- 'F OR 'C

2. Total capacity               :-  MBH,BTU OR Kw 

3. Sensible Capacity          :-  MEH, BTU OR Kw 

4. Fresh air                        :-  CFM OR L/S 

5. Fresh air Temperature :- 'F OR 'C 

6. Exhaust air                      :- CFM OR L/S

7. Exhaust air temperature :- 'F OR 'C 

8. Entering coil air temperature :- 'F OR 'C 

9. Leaving Coil air temperature :- 'F OR 'C 

10. Power Supply :- v-ph-Hz 

FCU Types and Construction 

Fan Coil Unit types,There is a two types of units 

1. Direct Expansion FCU 

2. Chilled Water FCU 

Ducted Concealed type, Non - Ducted Exposed type 

Fan Coil Unit (FCU)

1. Fan Coil Unit consist of only a fan and a Heating or Cooling element are located with in the space they are serving 

2. They may either just recirculate internal air, In which cause a separate ventilation system is required or may introduce proportion of fresh air that is mixed with the recirculate air 

3. Fan Coil units can be wall mounted, freestanding  or ceiling mounted and may be concealed in ceiling voids 

They may be controlled by local thermostats or by a building management system (BMS)

Direct Expansion FCU 

Direct Expansion fan coil units (FCU) Consist of only a fan and a heating or Cooling element, are located with in the space they are serving cooled by using refrigerant

Chilled Water Fan Coil Unit (FCU)

Chilled Water Fan Coil Unit (FCU) consist of only a fan and a Heating or Cooling element are located with in the space they are serving cooled by using water 

Continue To Read https://hvactech1.blogspot.com/?m=1

Follow us on Facebook 

https://www.facebook.com/1HVAC-TYPES-of-Chiller-241295560133529/

More information of HVAC 

My YouTube Channel subscribe

https://youtu.be/Q3ufZZN6LtU

HVAC trable shoot click here 

https://zi.ht/wKrdssro

What Is HVAC Role of system

   ROLE OF HVAC SYSTEM

  

                                        

                                           HVAC AHU                                           

                  

PHARMACEUTICAL INDUSTRY 

WHAT IS CGMP?

1. It is set of rules, regulations guide line for construction of manufacturing facilities

Manufacturing process and clean liness 

2. Control airborne particles dust and microorganisms through air filtration using high efficiency particulate air (HEPA) filters, Pre filters and fine filters 

Maintain Room Pressure 

Maintain Humidity by cooling below dew point or by using desicant dehumidifiers 

MAINTAIN SPACE TEMPERATURE 

Air Handling Unit AHU Design and selection

1. Physical Construction Requirement
2. Technical Requirement

 

1. Physical Construction Requirement 

  Essential requirement for Air Handling unit (AHU)

1. Supply Fan section 
2. Cooling Coil (DX or Chilled Water)
3. Pre filter 
4. Bag filter 
5. Mixing Box (fresh air and return air)

 Essential Requirement any Air Handling Unit AHU

Dx type requirement AHU

1. Ambient temperature :- 'F or C'
2. Total capacity                :- MBH,BTU OR Kw
3. Sensible   capacity        :-  MBH,BTU OR Kw
4. Supply air                      :- CFM OR L/S
5. Fresh air                         :- CFM OR L/S 
6. Entering coil temperature :- 'F or C' 
7. Leaving coil temperature   :- 'F  or 'C 
8. External Static pressure   :-   pa or ln WG
9. Power supply                     :-  v - ph-  Hz 

Chilled Water type requirement AHU

1. Ambient temperature  :- 'F or C'
2. Total capacity                :- MEH,BTU OR Kw 
3. Sensible Capacity        :-  MBH, BTU OR Kw
4. Supply air                      :-  CFM OR L/S 
5. Fresh air                        :-  CFM OR L/S
6. Entering coil temperature :- 'F or C' 
7. Leaving coil temperature :- F' or C'
8. External Static pressure  :- pa or ln WG 
9. Power supply                 :- v- ph - Hz 

Additional Essential Requirement for Chilled Water air conditioning Equipment 

1. Entering water temperature :- 'F or 'C 

2. Leaving water temperature  :- 'F or 'C 

3.  Chilled Water  flow  = GPM/LS 

Continue to read https://hvactech1.blogspot.com/?m=1

Followed us on Facebook 

https://www.facebook.com/1HVAC-TYPES-of-Chiller-241295560133529/

HVAC RELATED VIDEOS CLICK HERE 

https://youtu.be/I6GzIgqYSNA

HVAC Trable shoot click here

https://zi.ht/ijyOZXHt

How HVAC Noise points

How HVAC Noise points

                                          How HVAC Noise points                                              

The major source of noise in air conditioning system is due to air velocity and noise from fan 

The 5 path of noise

1.Duct borne noise

2. Radiated equipment noise 

3. Break in noise 

4. Break out noise 

5. Terminal end noise 

                                             DUCT                                           

1. Duct borne noise:- it is caused by the flow of air and directly dependent on the velocity of air 

2. Radiated equipment noise:- it is caused by vibration of equipment and inherent sound pressure of the equipment 

3. Break - in - noise :- it is radiated equipment noise that enters the duct work and propagates down the duct system 

4. Break - out - noise :- it transmits through the wall of the duct 

5. Terminal end noise :- it is caused by the air flows at the terminal devices such as diffuser or register 

What is code ?

Code :- 1. A code is a standard that has been adopted by one or more governmental bodies and has the enforce by the Law r 

When it has been incorporated into a business contract 

2. Mandatory only it regulatory body in your country had adapted the said code as lows,other wise,code will serve as generally accepted guidelines for design, Fabrication,Construction and installation 

What is standard ?

A standard can be defined as a set of technical definitions and guidelines how to instructions for designers and manufactures 

They serve as a common language, defining quality and establishing safety criteria 

Standard is required ?

1. Standard are document that establish engineering or technical requirements for products, practies methods or operations

2. Build confidence about quality in users

3. Lower the cost of production as required ments are standardised

What is Constant Air Volume ?

1. Constant Air Volume is a type of heating ventilating and Air Conditioning system

2. In a simple constant air volume system the supply air flow rate is constant but the supply air temperature is varied to meet the thermal loads of a space 

3. Most constant air volume system are small and serve a single thermal zone 

Constant Air Volume 

1. HVAC Systems require high air flow rates and higher amounts of energy for heating and cooling this increasing utility costs 

2. Constant Air Volume unit operates the fan and compressor at full capacity until the temperature drops to as specified setting 

Then the compressor turns off the on/off cycling is not efficient at keeping the space at a constant temperature 

3. Constant Air Volume systems are becoming            less 

Common in new building they are particularly 

Common in simple systems where fan coil units are supplied with a constant volume of fresh air 

To Continue Click here 

https://hvactech1.blogspot.com

hvactech1.blogspot.com

Follow us on Facebook 

https://www.facebook.com/1HVAC-TYPES-of-Chiller-241295560133529/

How HVAC CHILLER COMMISSIONING CHAPTER 2

WHAT IS FCU ? (FAN COIL UNIT)

                                               CHILLER UNIT                                      

               

FCU pump room Chilled water type, Total Cooling water temperature in out 42'F/58'F 

Water Temperature Different ^T 16'F water Flow Rate 34 USGPM 

Cooling Coil Entering Air Dry Bulb wet Bulb Temperature 75 9/62 82 KW Electric Heating 

Air Flow 870 CFM External Static press are 0.5 WG 220v/1 ph 60hz power supply fan motor 1hp complete with All standard accessories cooling coil Shall be made of copper tubes with Anti corrosive coated aluminium fins 

FCU 2 (FAN COIL UNIT)

FCU (BED ROOM) Chilled water Ducted concealed  type, Total Cooling Capacity 20.7 MBH, Sensible Cooling Capacity 20.2 MEH, 

Chilled Water Temperature in out 42'F/58'F water temperature difference ^T 16'F,Water flow Rate 26 USGPM,Cooling coil entering air dry Bulb wet Bulb temperature 75 6628 2kw Electric Heating 

Air Flow 890 CFM External Static pressure 0.5 WG 220v/1ph 60hz power supply fan motor HP 1hp complete with All standard accessories cooling coil Shall be made of copper tubes with Anti corrosive coated aluminium fins 

EXHAUST FAN 1

                                         

              Exhaust Fan

EAF Area served apartments in line centrifugal ceiling mounted complete with All accessories capacity 

200 CFM Direct drive variable speed External Static pressure 0.6 WG 220v/1Hp 60hz power supply

EXHAUST FAN 2

                               

              Exhaust fan

Area served Garbage Disposal wall mounted Centrifugal Complete with All Accessories Capacity 175 CFM Direct drive constant speed 

External Static pressure 04 WG 220v/1HP 60hz power supply 

FAF 1 (FRESH AIR FAN)

Area served Apartments in line centrifugal ceiling mounted complete with All accessories capacity 300cfm

Direct Drive variable speed External Static pressure 06 WG 220V/1hp 60hz power supply 

FAF 2 (FRESH AIR FAN)

Area served Corrdor in the Centrifugal Celing Mounted Complete with All Accessories Capacity 130CFM Direct drive variable speed External Static pressure 06 WG 220v/1ph 60hz power supply 

How Duct supply work

Supply Return and Exhaust Rectangular low pressure gal vanized steel duct complete with fittings,Support,Accessories and insulation 

Return Rectangular low pressure gal vanized steel duct complete with fittings, Support,Accessories and insulation 

Exhaust Rectangular low pressure gal vanized steel duct complete with fittings support and accessories 

Kitchen hood Exhaust Rectangular low pressure stainless steel duct complete with fittings support and accessories 

Duct work Accessories volume

                                  

                   Duct work

Motorized  control Dampers various size with 24v/230 Actuators 

Motorized fire smoke Dampers various size with 24v/230 AC Actuators 

Air side controls and testing 

HVAC control complete with sensors, Instruments,DOC,Actuators and all Necessary instrumentation and accessories testing and Balancing

Followed my face book page 

https://m.facebook.com/home.php?hrc=1&refsrc=http%3A%2F%2Fh.facebook.com%2Fhr%2Fr&_rdr