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C o n t r o l F u n c t i o n D e s c r i p t i o n s (continued)
Screen
Function
SCREEN 61
PROCESS LOOP BREAK
3°F
20 SEC
SCREEN 62
PROCESS TEMP DEV
5°F
5 Sec
SCREEN 63
REGEN DIFFERENTIAL
5°F
10 SEC
SCREEN 64
RETURN AIR ALARMS
4-26
l Operation
This set value is the minimum difference
between the regeneration inlet and outlet
temperature for the wheel rotation alarm.
Once this difference is reached for the time
value, the dryer will alarm wheel rotation
failure.
5 MIN
SCREEN 65
PASS 150°F
This is an example of an Alarm Setup
deviation screen. If the actual temperature
goes outside this temperature band (High
or Low) for a set amount of time, the dryer
will give a deviation alarm. With the proper password (see page 4-32, screen 85),
these values can be changed.
This is a delay time for the wheel rotation
alarm from start-up so regeneration can
come up to temperature.
REGEN DIFFERENTIAL
TIME DELAY
This is an example of an Alarm Setup
Loop Break screen. When actual temperature is outside the deviation band, if the
temperature is not moving toward the setpoint at a rate greater than or equal to X°F
over Y seconds, then the dryer will alarm
on Loop Break. Once the actual temperature is within the deviation band, the Loop
Break is ignored.
SHUT 180°F
This screen shows the return air temperatures at which the dryer will give a passive
alarm, and when the dryer will shutdown
on High Return Air Temp.