Preliminary Checks; Starting The Dryer; Stopping The Dryer; Start---Up And Operation - Sullair SR 250 Manual De Uso

Code: 02250145- - 604 SR- - 250 --- SR- - 3000

3 Start---up and operation

N.B.: For instructions on operation of control panel, refer to Chapter 4.
3.1

Preliminary checks

Before starting up the dryer, make sure that:
a) the air inlet valves are closed and there is no air flow through the dryer.
b) The mains power supply is commensurate with the dryer voltage.
c) The dryer is installed in compliance with the installation instructions given in
Chapter 2.
3.2

Starting the dryer

a) The dryer is started using the main switch.
b) Always start up the dryer before activating the air compressor.
c) Set the yellow---red main disconnect switch QS to ON so that the (yellow) power
on LED on the control panel illuminates.
d) Wait about 5 minutes until the dryer is running at the correct operating tempera-
tures and pressures.
e) Slowly open the air inlet valve to pressurise the dryer.
f) Slowly open the air outlet valve. The dryer is now operating (drying).
g) Always leave the dryer running while the air compressor is operating.
h)
It is very important to check the rotational direction of the SCROLL
compressors. If supplied with the wrong phase frequency they will turn
in the opposite direction. In this case they are very noisy and risk getting
damaged. SWAP OVER THE PHASES IMMEDIATELY.
Check that the pressure reading on the (LP) gauge, situated on the front
panel, decreases.
All manuals and user guides at all-guides.com
3.3

Stopping the dryer

a) The dryer is stopped using the main switch.
b) Stop the dryer 2 minutes after shutting down the air compressor or interrupting
the air flow to the dryer.
Avoid allowing compressed air to enter the dryer when the dryer is
switched off or when it is in an alarm situation which stops the refrigeration
compressor.
3.4 Operation
S The dryer operates automatically. It is factory set for a dew point of 37˚F (3˚C)
(ISO 7183, Part 2) and therefore requires no further calibration.
S Do not exceed the machine's design limits, bypass excess air flow and check the
unit model and/or installation.
S For maximum performance from your dryer, follow the maintenance schedule de-
scribed in Chapter 5.
S The sound pressure level recorded for these dryers at 40 inch (1 metre) from the
machine in free field conditions) is less then 70 dB (A).
S Fig. 6 shows the Dryer's refrigeration and air circuits.
4 4
English