CHANGING OR ADDITION OF OIL OF REFRIGERATION UNIT

1.0 PURPOSE:
    
    To  describe  a  standard operating procedure for  cleaning  of   condenser tubes of refrigeration compressors.
    
2.0    SCOPE:
    
    The standard operating procedure describes in detail the method  for cleaning of condenser tubes of refrigeration compressors.
    
3.0    RESPONSIBILITY:
    
    The responsibility of cleaning the condenser tubes of refrigeration  compressors lies with the staff of rank not  lower  than  the junior utility operator. 
        
The  responsibility of preparing, reviewing  and approving  the  standard  operating  procedure lies with the  Manager  -  Maintenance,  Head of Production and Head of QAD respectively.
    
4.0    METHOD:
    
4.1        Close the condenser  inlet and outlet water valves. 

4.2        Isolate the equipment electrically. 

4.3        Keep "under maintenance" board to the main feeder. 

4.4       Remove the head bolts and head on the rear side of the condenser. 

4.5        Remove  the  gasket of the head gently and place it in  a  safe  place. 

4.6        Check  for gas leakage from condensor  tubes by  applying  soap  solution. 

4.7        If  any leakage of gas is found, call for an  external  service  for rectification.

4.8        Brush  the  tubes of the condenser one by one by  using  a  1/4  size nylon brush attached to a 5 feet long rod.

4.9        Brush each tube 2 to 3 times.

4.10       The  dirt  remained  on another side will  be  flushed  out  by  slightly  opening  and closing the condenser inlet  and  outlet  water valves.

4.11       Fix the gasket to the head in correct position and fix the head  to the condenser.  

4.12       Tighten  all the bolts and open the condenser inlet and  outlet  water valves.

4.13      For  descaling  of the condenser proceed from steps  4.14.1  to  4.14.6.

4.14.1     Close the condenser water valves.

4.14.2     Prepare a dilute 10% salphamic acid solution in PP drum.

4.14.3     Pump  this solution into the condenser by connecting  hoses  to  inlet and outlet nipples provided to the condenser water lines.

4.14.4     Pump  the  solution  till the scale is removed or  for  1  hour  approximately.

4.14.5     Circulate fresh water in the condenser for 5 min.

4.14.6     Remove  all hose connections  and close the nipple valves.

4.14.7     Open the condenser inlet and outlet water valves.

5.0        RECORDING

    Nil. 

Refrigeration unit, addition, changing, unloading, oil pressure