Gorman-Rupp Pumps T4A60S-F3L 1264856 thru 1314224 - Manual (Page 21)

OM-05512 SUPER T SERIES
OPERATION PAGE C - 4
EPS Functions
Actual functions of the control occur as follows:
Power is applied to the unit.
Unit performs display test for approximately 4
seconds.
When the pressure level showing is equal to or
greater than the “A.on” setpoint, the Horn out­
put contacts will close in approximately 1 sec­
ond and a delay, equal to the “Hrn dLy” time,
will occur before the A output contacts close.
When the level showing is equal to or greater
than the “B.on” setpoint, the B output contacts
will close in approximately 1 second.
When the pressure decreases to a level equal
to or less than the “B.of” setpoint, B output
contacts will open in approximately one sec­
ond.
When the pressure decreases to a level equal
to or less than the “A.of” setpoint, A output con­
tacts will open in approximately one second.
If an optional Low Temperature Thermostat is
connected to the unit and the thermostat con­
tacts close, the unit displays “lo tpt” on the dis­
play. In approximately 1 second, the Horn out­
put contacts close, then after the “Hrn dLy”
time, A output contacts close. A output con­
tacts will remain closed as long as Low Tem­
perature Thermostat contacts are closed.
When the Low Temperature Contacts open, A
output contact will open only if the level is
equal to or less than the “A.off” setpoint.
As long a the Low Temperature Thermostat
contacts are closed, the display will show “lo
tpt” unless switch is pressed to display
some other information. Level is not viewable
until the Low Temperature Thermostat con­
tacts open.
The user may wish to check Setpoints Off/On
and Horn output/A output delay times. “Bump­
ing” the switch will display all of the informa­
tion desired.
NOTE
One second delays in contact opening/closing is a
result of time sampling of the pressure signal to fil­
ter false signals that could cause “nuisance” trip­
ping of the contacts.
NOTE
If the “Hrn dLy” is changed during the actual A out­
put delay cycle, the current cycle is not changed;
the change becomes effective on the next A output
delay cycle.
Use caution to ensure that the “‐‐.on” set­
point (i.e. “A.on”) is not adjusted to a level
less than the corresponding “‐‐.of” set­
point (i.e. “A.of”). Improper adjustment of
the off/on setpoints will render the unit non‐
functional, resulting in flooding.
EPS Calibration
NOTE
Zero offset and span adjustments are only neces­
sary to calibrate a new unit, or when replacing the
transducer. Once calibrated, “ON” and “OFF” set­
points will be stored in the unit's memory. Liquid
level adjustments will be used whenever “ON” and
“OFF” liquid levels must be reset.
There are two reasons for the user to calibrate the
unit. When power is applied, the unit confirms set­
points and other calibration information for validity.
If the setpoints are not valid, the LCD screen shows
“EEP bAd” and the unit must be recalibrated. Also,
if the unit is moved, or some other external change
takes place, the unit must be recalibrated.
Zero Adjustment
Zero adjustment tells the unit when the transducer
is exposed to zero water (atmospheric) pressure.
When recalibration is desired, hold the transducer
in hand and apply power to the unit. The LCD
screen will display “Level ABC”. Press and hold
for 5 seconds. The LCD screen displays “Input?
External XDUCR”. Perform the following calibration
procedures.