6
3. Setting Schedule
a. Use the ‘Hour’ and ‘Minute’ buttons to select desired
“Day of week + on/off”. Press the ‘Set/Run’ button to
accept new value
b. Use the ‘Hour’ and ‘Minute’ buttons to set hour (00 to
23). Press the ‘Set/Run’ button to accept new value
Note: If the hour setting is ‘IGNORE’, Press the ‘Set/
Run’ button again to move the cursor under the “Day
of week + on/off”. Repeat steps a through b (or c) as
needed.
c. Use the ‘Hour’ and ‘Minute’ buttons to set minutes (00,
10, 20, 30, 40, 50; not shown if hour setting is
‘IGNORE’). Press the ‘Set/Run’ button to accept new
value and return to “Day of week + on/off”. Repeat
steps a through c as needed.
d. Push the ‘Day of the Week’ button at any time to return
to the Main Menu.
NOTE: Scheduler will ignore programmed commands
for 10 minutes after exiting program mode.
4. Hours To Service
a. Use the ‘Hour’ and ‘Minute’ buttons to scroll through
the range of permissible values (0 to 8760) before
service reminder is initiated. Press the ‘Set/Run’
button to accept new value. (Only hours that
refrigeration compressor is operating are counted).
b. Press the ‘Day of the Week’ button at any time to
return to the Main Menu.
NOTE: On dryers with air-cooled condensers, regular
condenser cleaning is recommended. Dirtiness of
ambient air at installation site will determine frequency
of service. Typically once a month is recommended.
Dryers contain an integral 3 micron filter. As the filter
element accumulates solid contaminants, differential
pressure increases. Solid particulate load in the
compressed air supply will determine frequency of
service. Typically element changeout is recommended
at least annually.
5. Push the ‘Day of the Week’ button to exit program mode.
NOTE: If after 60 seconds no button is pressed while in
Program Mode, the audible alarm sounds for five (5)
seconds. Dryer will resume previous operating mode.
6. Manual Operation
a. To manually turn the refrigeration system on or off use
‘On/Off’ button; Push the ‘Set/Run’ button to return to
schedule.
NOTE: After power interruption dryer will reenergize in
Manual override, refrigeration system off. To restart
Schedule: Push the ‘Set/Run’ button.
C. Starting dryer
IMPORTANT: Dryer must be energized 24 hours before
starting refrigeration compressor.
NOTE: It is recommended that dryer be started 15 minutes
before compressed air flow begins.
1. On water-cooled models: after 24 hours, begin cooling
water flow.
2. Check for proper electrical voltage.
3. Slowly pressurize unit air side by opening inlet isolation
valve. Check for leaks.
4. After 15 minutes, open outlet isolation valve slowly.
5. Close air bypass valve.
6. Dryer may be operated in Manual or scheduled modes.
NOTE: Check for correct phasing of unit. On air-cooled
models: check fan rotation (air must be pulled through the
condenser). Fans may not start immediately or may cycle on
and off. If rotation is in the wrong direction follow the
procedure below. On water-cooled models: After starting dryer
if an unusual noise is heard and the discharge line does not
get hot, stop the dryer, reverse two power leads, restart, and
verify discharge line gets hot.
Manual mode - push On/Off button - refrigeration com-
pressor will start and run, green Compressor-on light will
illuminate. In this mode compressor will run continuously
and will not be turned on and off by the monitor. MANUAL
OVERRIDE will appear on interface panel.
Schedule mode - push the ‘Set/Run’ button.
SCHEDULE RUNNING will appear on the interface panel.
The refrigeration compressor will continue to be on or off
(as selected in the Manual Override Mode) until the next
scheduled event. The compressor will then turn on or off
as programmed.
NOTE: Schedule may be returned to the manual mode at any
time using the ‘Set/Run’ button. MANUAL OVERRIDE will
appear on interface panel. To reinstitute Schedule, push the
‘Set/Run’ button again.
NOTE: Restart after the power interruption. Unit will be in
MANUAL OVERRIDE mode, refrigeration compressor, off
when power is restored after power interruption.
7. To reinstitute SCHEDULE RUNNING, push the ‘Set/Run’
button.
IMPORTANT: Dryer must be energized 24 hours before
refrigeration compressor is started
D. Operating check points
1. Check that green Power-on light is illuminated
2. Check that green Compressor-on light is illuminated if
dryer is on in the manual mode or it is a scheduled on
time
IMPORTANT: Refrigeration compressor must be restarted
after power interruption.
3. Check interface panel
NOTE: Interface panel will scroll through three screens
(Current Time/Operating Status, Hours to Service and Total
Operating Hours).
a. Verify that current time is correct
b. Check HRS TO SERVICE: this indicates time
remaining until service is required; allow time for
required maintenance items to be ordered
c. Check operating status:
MANUAL OVERRIDE - Dryer is either running
continuously (not being controlled by the scheduled
on/off times) or the refrigeration compressor has been
shut off using the ‘On/Off’ button.
SCHEDULE RUNNING - Refrigeration compressor
is being turned on and off by the monitor per-
programmed schedule (see B.3. to set schedule).