10
COMMISSIONING MODE:
Pressing button to the right of the choice menu and selecting “1” will set the system to operate in this mode . As described
previously, this will enable the user, on the SYSTEM SCREEN, to toggle pumps ON and OFF to support startup or maintenance activities . The system will
also default to this mode when only 1 pump is selected as AVAILABLE .
MANUAL MODE:
In this mode, the system will recognize a LEAD pump as well as LAG pumps (in the case of the Triplex and Quad system there will
be LAG 1, LAG 2, and/or LAG 3 pumps) . The LEAD pump will always operate first to try and achieve the pressure setpoint . A Pressure Differential from
Setpoint is set by the user (on SETUP PAGE 2) for each lag pump . If the Pressure Value read by the transducer drops below the Pressure Setpoint MINUS
the LEAG/LAG Pump 1 Pressure Differential from Setpoint value, the LAG 1 Pump will turn on . In like turn the other lag pumps will turn on if the Pressure
Value drops below their trigger points . The lag pumps will continue to operate until the Pressure Value reaches setpoint . After the system has operated
for 10 seconds at the Pressure Setpoint, the lag pumps will turn off . When operating in MANUAL MODE, the user can switch the lead pump (as well as
LAG 1, LAG2, and LAG3) by pressing the SWITCH ACTIVE/IDLE pump button located on the SYSTEM PAGE . Note this switching button is only shown when
the system is in this mode of operation .
TIME BASED MODE:
This mode is similar to the MANUAL MODEL except that the lead pump (and lag pumps) will rotate once a day at the time selected
by the user . The user is prompted to input this trigger time when selecting this mode .
DAY/TIME MODE:
This mode is similar to the TIME BASED MODE except that it allows the user to designate which days of the week (SUN through SAT)
and time of day the change will occur . These choices are presented when selecting this mode,
While in this SETUP PAGE 1, the user can also select how much time the previous LEAD pump stays on when the lead pump has now rotated to next
pump in line . This selection can be made by pressing the time button immediately to the left of the PUMP SHUTDOWN TIMER label . This timer will
enable for a smooth transfer between the lead pumps immediately following a rotation .
The user can return to the SYSTEM screen by pressing the SYSTEM button located at the lower right side of the screen or they can go to SETUP PAGE 2 Screen .
SETUP PAGE 2 screen is shown in Figure 7 and contains a number of different pressure control inputs for the user to select . Each is mentioned below:
PRESSURE SENSOR 20 MA
- The unit is shipped with a 4-20 MA/0-150 PSI pressure transducer . If a user elects to install a 4-20 MA transducer with a
different pressure range then the upper end of that range needs to be identified here . For example, with a 4-20 MA/0-200 PSI transducer the user
would enter a 200 PSI value in this field .
LEAD/LAG PUMP 1 PRESSURE DIFFERENTIAL FROM SP
- LAG 1 pump will turn on when the Pressure Value goes below the Pressure Setpoint MINUS this value .
LEAD/LAG PUMP 2 PRESSURE DIFFERENTIAL FROM SP
- LAG 2 (in TRIPLEX and QUAD models) pump will turn on when the Pressure Value goes below the
Pressure Setpoint MINUS this value . This controller will require this value to be equal to or greater than the LEAD/LAG PUMP 1 DIFFERENTIAL .
LEAD/LAG PUMP 3 PRESSURE DIFFERENTIAL FROM SP
- LAG 3 (in QUAD models) pump will turn on when the Pressure Value goes below the Pressure
Setpoint MINUS this value . This controller will require this value to be equal to or greater than the LEAD/LAG PUMP 2 DIFFERENTIAL .
TIME DELAY BAD SENSOR SYSTEM SHUTDOWN
– The system will shut down when the pressure transducer signal reads less than 4 MA . One reason this
value can occur is if there is a failure in the sensor or sensor cabling . To limit the possibility of over pressurization, the control will shut down the pumps
in this instance . To prevent nuisance shutdowns when there is a calibration issue with the transducer, the user can select a time period for the pumps
to continue operating when this condition occurs . The user is limited to a time selection between 0 – 10 seconds .
MODBUS REMOTE WRITE:
For convenience, the user can select the MODBUS remote operation here on this screen and it operates in the same manner as
if the selection were made on the SYSTEM SCREEN .
Figure 7
