Alkin W3 Series, Instruction Manual & Parts List

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W 3 S E R I E S
H I G H P R E S S U R E A I R C O M P R E S S O R
©ALKIN COMPRESSORS
23

Do not use another type of oil without prior written approval of the manufacturer.

Do not mix oils.

If you will have to change the type of oil to another approved oil, remove the crankcase cover and clean
thoroughly the inner surfaces of the compressor crankcase. Make sure there will be no lint left inside after the
cleaning.

Refill the oil every 6 months unless you reach the replacement time of the oil stated in the maintenence
table.
Extreme Cold Operating Conditions:
Operating conditions at below freezing temperatures must be reported to the manufacturer for taking necessary
measures to avoid damage. Generally a crankcase heater is fitted to prevent the effect of cold ambient temperatures.
Motor Lubrication
:
Most TEFC motors are supplied with greased and sealed breaings which do not need maintenance. Motors with
greasing nipples indicate that it needs to periodically be greased. In that case you will find a specific instruction booklet
inside this manual which will refer to all maintenance works regarding the electric motor. Follow the instructions in
this manual.
4.3 Adjustment
4.3.1 Pressure Switch Adjustment
Pressure adjustment on Automatic Start/Stop Controlled W3 Compressors is made according to the following steps:
You can adjust PH1 pressure switch to the required upper pressure (working pressure) by turning the red calibration
screw on the pressure switch clockwise or anti-clockwise. Turn the screw clockwise to increase the upper pressure.
In this case you may also need to change the safety valve as it is set to open when it reaches the upper pressure. Turn
the screw anticlockwise to decrease the upper pressure. Compressor is already set in the factory upon the customers
working pressure needs. You can adjust the working pressure if you need a higher or lower working pressure than
the factory settings. Compressor will stop when it reaches the adjusted upper pressure.
Standard Pressure Switches used on Alkin Automatic Start/Stop controlled W3 units have standard differential of 20
Bar. In other words, lower pressure is set automatically at 20 Bar below the set working pressure. Compressor will
restart when the final pressure decreases to a pressure 20 Bar below the set working pressure.
4.3.2
Sequential Drain Timers
Adjustment
The drain function is controlled by a sequential timer relay that is located inside the control
cabinet. This is how this relay looks.
Upwards dial controls the duration of the automatic drain which the drain valve remains open
(drains the condensate) It is adjustable between 0 to 10 seconds. The dial does not have figures
showing the times on it; it needs to be proportionally adjusted. The full scale shows 10 seconds
while half of the scale indicates 5 seconds. The downwards dial is used to adjust the time period
of the automatic drain during which the drain valve will remain closed. Draining time periods
and duration are adjusted as 6 seconds for every 7 minutes.
Factory settings should not be
changed for trouble free operation.
4.3.3 Safety Valve Adjustment
Safety valves are set slightly above the normal working pressure of the stage they protect. The normal stage pressures
are shown in the following table:
Stage Pressures