17
Test Mode
TABLE 4B
TOWER STATUS
VALVE POSITION
SOLENOID/TERMINALS
ENERGIZED
(light illuminated)
STEP
NUMBER
WHAT
OCCURS
MODE
PRESSURE
L
P/R
L
IN
R
P/R
R
IN
L
P/R
L
IN
R
P/R
R
IN
LT
RT
LT
RT
Start
D
D
LP
LP
C
O
C
O
1
R IN closes
D
-
LP
LP
C
O
C
C
E
2 (1)
R P/R opens
D
R
LP
<2
C
O
O
C
E
E
3
No change
D
R
LP
<2
C
O
O
C
E
E
4 (2) (3)
R P/R closes
D
-
LP
REP
C
O
C
C
E
5
R IN opens
D
D
LP
LP
C
O
C
O
6
L IN closes
-
D
LP
LP
C
C
C
O
E
7 (1)
L P/R opens
R
D
<2
LP
O
C
C
O
E
E
8
No change
R
D
<2
LP
O
C
C
O
E
E
9 (2) (3)
L P/R closes
-
D
REP
LP
C
C
C
O
E
NOTES:
(1) Close purge rate valve during this step to check for any valve leaks. No air should exhaust through the muffler. If air is exhausting through the muffler, check all valves for leaks.
After testing for leaks or fixing any leaks, be sure to open the purge pressure valve and reset the purge pressure.
(2) Do not go to the next step until the tower is repressurized.
(3) Switching failure alarm circuit is energized during this step (alarm light should flash until pressure exceeds 40 psig).
CODES:
R IN - Right inlet valve
D - Drying
E - Energized
R P/R - Right purge/repressurization valve
R - Regenerating
L IN - Left inlet valve
LP - Line Pressure
L P/R - Left purge/repressurization valve
<2 - Less than 2 psig
LT - Left tower
REP - Repressurizing
RT - Right tower
C - Closed
O - Open
4.4 Test Mode
WARNING
Enclosure contains electricity.
Use caution when working inside box.
4.5.1 Test Mode - Standard Control Panel
4.5.1.1 Wait until point in cycle when right tower is drying and left
tower has completed regeneration and repressurization (both
towers at full line pressure).
4.5.1.2 De-energize dryer (on/off switch off, “O”); Select Test Mode by
placing DIP switches 5 and 6 (found inside enclosure) in the ON
(up) position; Re-energize dryer (1) (2).
4.5.1.3 Use Reset/step button to step through the operating cycle in the
order shown in Table 4B.
4.5.1.4 Complete all 9 steps, allow the left tower to fully repressurize
and de-energize dryer. (1) (3).
4.5.1.5 Reset DIP switches 5 and 6 to operating mode desired (10 min.
cycle - 5 is OFF, 6 is ON or 4 min. cycle - 5 is ON, 6 is OFF); Re-
energize dryer.
(1) Do not de-energize dryer unless both towers are at line pressure.
(2) If Test Mode is selected without de-energizing dryer, Test Mode light
will blink until tower on line has completed drying. Dryer will then enter
Test Mode and light will glow steadily.
(3) If another operating mode is selected without de-energizing dryer and
before all 9 steps are completed, selected mode light will blink and dryer
will automatically complete a cycle. Dryer will then operate in selected
mode and light will glow steadily. You may also use the Reset/step but-
ton to manually step through the cycle until the left tower drying light
illuminates and pressing the Reset/step button will not advance through
further steps.
