PTA522, PTA523 and PTA524 Automatic Silent Compressors
Chapter 3: Operation
Page 8
ETN057391-D02
3.4.4. Draining the Condensate
Compressing air with non-zero humidity causes condensation in the system, which needs to be drained to avoid damage.
The Thorlabs PTA52x compressors are fitted with a timer controlled system that automatically drains condensate
accumulated inside the air tank, collecting the discharge in the drainage bottle provided (item 10, Figure 2). A draining cycle
is performed every time the compressor is started, and periodically
while the compressor motor is running
, with the
period settable on the timer unit (Figure 10).
Note:
the auto drain does not operate when the motor is idle.
Note
Note: Because there is some oil mixed with the water in the drained condensate, this appears as a brown colour
in the bottle, and is completely normal.
Figure 10 Condensate Drain Timer
To perform a manual drain, push the TEST button.
Note:
The tank must be under pressure, and the motor running.
3.4.5. Venting the Compressor Air Tank
The compressor air tank may need to be vented for several reasons, including during maintenance. There are two ways to
achieve this: by venting through the pressure relief valve, or through the outlet pressure valve. The latter is the most
controlled method, and the preferred route where possible.
1.
Venting via the outlet pressure regulator
. Close the valve on the outlet pressure regulator by turning the knob fully
anticlockwise, and disconnect any tubing from the outlet that might be connected. Ensure the manual isolation valve
(Figure 2, Item 11) is open. The pressure in the air tank can now be vented in a fully controlled way, by slowly
opening the outlet pressure regulator valve.
2.
Venting via the pressure relief valve
. The pressure relief valve on the air tank (Figure 2 Item 7) has a loose end
normally used for connecting to hosing; pulling on this will vent pressure in the air tank directly. The more pressure
there is in the tank, the easier this is to achieve.
Caution
If venting via the pressure relief valve, there is a sudden release of air which is very noisy and could cause alarm
to other people in the vicinity. A verbal warning should be given that a vent is about to happen, before
commencing the vent.
3.4.6. Checking the Pressure Filling Time
Check the compressor as follows:
1. Empty the compressor air tank using either method given in section 3.4.5.
2. Close the manual isolation valve at the outlet (Figure 2 Item 11).
3. Start the compressor and check the time elapsed between starting and automatic switch off; this should be around
90 seconds for 115 V models and 110 seconds for 230 V models.
4. Check that there are no leaks on connections.
5. Check that the max. pressure (8 bar/120 Psi) is achievable.
