SECTION 5 PRINCIPLE OF OPERATION
23
5.8 OPERATING PROCEDURES
5.8.1 STARTUP PROCEDURES
Initial Startup Procedures The following procedure
must be followed. Failure to do so could damage
your dryer and invalidate the warranty. Before
starting.
1. Be sure dryer 'on/off' switch is in the 'off'
position and connect power to dryer.
2. Turn power on only at the branch circuit
breaker or fuseable disconnect for 24 hours
prior to starting the dryer. This will allow pre-
heating of the refrigerant oil preventing liquid
refrigerant washing of the oil due to refriger-
ant migration and allow easier staring of the
compressor.
3. Make sure the air inlet and outlet piping is
piped correctly and piping is supported cor-
rectly. Do not use the dryers inlet and outlet
connections ports as a means of supporting
the piping.
4. Make sure condensate lines are run properly
and to the correct locations.
5. Verify the condensate drain on and off time.
Manufacturing studies have shown that a
time setting of 5 minutes off and 5 seconds
on have the best value. During periods of
high humidity it is recommended that 'off'
time and 'on' time is checked to validate that
all condensation is being removed. It is pos-
sible that the off time may need to be
decreased and the on time increased
6. Check that there is adequate ventilation on
all air cooled units.
7. For water cooled units, make sure cooling
water is being supplied to the unit.
8. Confirm proper inlet air pressure, tempera-
ture, and flow to the dryer.
9. Pressurize the unit by opening an air inlet
valve with the bypass valve open and the air
outlet valve closed (3 valve bypass is option
offered by Sullair). 12. Push the green on
switch. The 'dryer on' light will illuminate and
the compressor will start (If dryer does not
start reverse any two of the 3 phases).
10. Slowly open the air outlet valve to pass com-
pressed air through the dryer and close the
optional bypass valve if installed
3-Phase dryers equipped with 3-Phase fan(s) are
supplied with a phase controller to avoid a dryer
starting if fan(s) are turning in the wrong direction. It
is necessary to invert two phases if phase controller
doesn’t allow dryer to start
5.8.2 SHUT DOWN PROCEDURES
1. Press the red off button.
2. If unit is water cooled 10-15 minutes after the
unit shuts down, cooling water can be shut
down.
3. Turn off main disconnect if necessary.
WARNING Dryer failure resulting from a dirty
condenser is not covered under warranty. Air
Cooled Condenser Maintenance Procedures
Air cooled condensers may be cleaned by
blowing clean with a compressed air blow
gun or by cleaning with a soft brush. Low
pressure team cleaning or condenser clean-
ing chemicals may be necessary for heavy
deposits. Do not use wire brushes as this
may bend the fins, causing leaks. Straighten
any bent fins and fan blades. Monthly
inspection of the condenser is recom-
mended, More frequent service may be
required if dryer is located in a dusty or dirty
area. Ambient air filters are required for dry-
ers located in an excessively dusty or dirty
environment.
M
AINTAINING THE AUTO DRAIN
1. Turn dryer on/off switch to 'off' position.
2. Disconnect power supply to the dryer.
3. Lockout and tag power supply in accordance
with OSHA regulations.
4. If applicable, switch dryer to bypass mode.
5. Remove filter strainer and clean.
6. Disassemble the solenoid valve, and clean
or replace all parts necessary.
7. Reassemble valve and test, using the test
button on the electronic drain timer panel.
8. Repressurize system and test drain by using
the test button on the electronic drain timer
panel.
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