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Air Conditioning Schedule Maintenance

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Air Compressor Room Ventilation


The inlet grids and ventilation fan should be installed in such in way that any recirculation of cooling air to the compressor or dryer is avoided. The maximum air velocity through the grids is 5 m/s or 16.5 ft/s

Ventilation system is calculated laws is given bellow

Qv= 1.06 N/DT for Pack versions
Qv= Required ventilation capacity in m3/s
N= shaft input of compressor in KW
DT= Temperature increases in the compressor room in °C

How one design Air Compressor Pipe?

Air compressor installation Requirement

1.Install the compressor unit on a solid, level floor suitable for taking its weight 2.Position of the compressed air outlet valve.

Air compressor pressure drop calculation is given bellow DP = (L X 450 X Qc=1.85 )/ (d5 X P )
Where, D= Inner diameter of the pipe in mm DP = Pressure drop in bar, pressure drop maximum considered 0.1 bar L= length of pipe in m P= Absolute pressure at the compressor outlet in bar Qc = Free air delivery of the compressor in l/s
It must be follow the connection of the of the compressor air outlet pipe is made on top of the main air net pipe in order to minimize carry-over of possible condensate residue.

How one Operating and Testing the Air compressor Safety Valve?

How one Operating and Testing the Air compressor Safety Valve?

Operating the Air compressor Safety Valve:
Operate the safety valve by unscrewing the cap one or two turns and re-tighten it.

Testing the Air compressor Safety Valve:
Before removing the valve one must depressurize the compressor Valve can be tested and separate air line. If the valve does not open at the set pressure stamped on the valve, it must be replaced.

No adjustments allowed Never run the compressor without safety valve Must wear goggles Must wear hand gloves

How one solves the Problem of Air Compressor?

Problem solving of Air compressor
Before start working on Air Compressor must be follow this caution
Before carrying out any maintenance, repair work or adjustment, press the stop button, wait until the compressor has stopped, press the emergency stop button and switch off the voltage. Close the air outlet valve and lock it if necessary.

Problem of Air Compressor Condition 1:
Compressor starts running but does not load after delay time.
1.Solenoid valve out of order 2.Inlet valve stuck in closed position 3.Leak in control air flexible 4.Minimum pressure valve leaking when net is depressurized
1.Replace solenoid valve 2.Check the valve 3.Replace leaking flexible 4.Check the valve

Problem of Air Compressor Condition 2:
Compressor does not unload, safety valve blows

How ones maintenance of Air Dryer?

Maintenance Procedure of Air dryer
Dryer Maintenance:
One must follow safety precaution any types of maintenance of dryer machine

Safety precautions:
1.Contact of Refrigerant with the skin will cause freezing. One must be worn gloves avoid this risk. If refrigerant contacted with skin, the skin should be rinsed with water. On no clothing account may clothing be removed.
2.Always should be wear safety glasses. Because fluid refrigerant will also cause freezing of the eyes.
3.Before starting work must check the area is ventilated. Because refrigerant is harmful. Do not inhale refrigerant vapours.

Dryer Machine Refrigerant:hydrofluorocarbons (HFC)

Be aware the internal elements such as the pipes can reach a temperature of 110 ˚C or 230 ˚ F. Therefore wait until the dryer has cooled down before removing the panels.
Before starting any maintenance or repair works, switch off the voltage and close the air inlet and outlet valves.

Schedule Maintenance:
1.Must keep the dryer always clean.
2.Brush or bl…

Problem Solving of Air Dryer

Problem Solving of Air Dryer

How one solves the problem of Air Dryer?

Condition 1:

Pressure dew point too high
Fault: 1.Air inlet temperature too high. 2.Ambient temperature too high 3.Shortage of refrigerant 4.Refrigerant compressor does not run 5.Evaporator pressure too high 6.Condenser pressure too high.
Remedy: 1.Check and correct, if necessary must clean the after cooler of the compressor 2.Check and correct if necessary draw cooling air via a duct from a cooler place or relocate the compressor 3.Have circuit checked for leaks and recharged. 4.Clean condenser 5.Have hot gas bypass valve adjusted 6.Clean condenser and clean the fan