FE PETRO EcoVFC - Master-Slave Control and Configurations; Master-Slave Operation Modes

8
SW6 Poles 6 - 8
These switches are not used. Leave them in
the OFF position.
Note: EcoVFC may operate in an unpredictable manner if
any of the switches, SW6 Poles 6-8, are in the ON
position.
11. Replace the cover of the EcoVFC.
12. Insert a 0 - 7 bar (0 -100 psi) pressure gauge into
the 1/4” line test port of the submerged pump
(or other pressurized test location in the piping
system). Turn power on to the EcoVFC at the
load center, turn on the submerged pump at the
dispenser and inspect the line test port for leaks.
If there are any leaks, immediately turn off the
submerged pump at the dispenser and the load
center and repair the leaks.
13. Begin purging the air from the piping system by
activating a dispenser handle and pumping product
into an approved container. Verify that while the
pump is on but no product is being dispensed,
the pressure reading on the gauge is equal to the
related pressure from Table 4 in Step 22,
+0.3 / -0.5 bar (+5 / -7 psi).
Note: If pressure in the piping system is much lower than
selected, it is possible that the polarity of the motor
power wires is not correct, causing the motor to
run in reverse rotation. Turn off the pump at the
power supply, (wait one minute after LED display
blanks before opening the cover) and change the
connection of any two wires at the pump or at the
EcoVFC motor terminals. Turn the pump back on
and read the pressure gauge again. The electrical
connection, which gives the higher reading on the
pressure gauge, is the correct one.
14. Complete purging the remaining air from the piping
system and dispensers. If using Master-Slave or
Master-Slave/Alternating Circuit, continue with
next section. If not, go to “EcoVFC Site Set-Up”
section.
Master-Slave Control Connections
Note: For Master / Slave and Alternating congurations,
the EcoVFC can only be paired with other
EcoVFC’s. Because of enhanced communication
protocols, the EcoVFC is not capable of
communication with the IST-VFC unless SW6 Pole
3 (IST-VFC Compatibility Mode) is switched ON.
IST-VFC Compatibility Mode is available in rev 1.18
software or higher EcoVFCs.
To avoid the risk of potentially lethal
electrical shock, explosion or re,
always tag and lock circuit breakers
in the off position before removing the
cover of the EcoVFC.
After disconnecting power to the
EcoVFC, wait one minute after LED
display blanks before opening the
cover for servicing. Voltage stored
in the capacitor bank of the EcoVFC
presents a risk of potentially lethal
electrical shock even after power is
disconnected.
15. When two IST pumps or STP units with VS4
or VS2 sufx are installed to be run in parallel
(discharging into the same line) three different
modes of operation are possible, as follows:
Master – Slave
When a hook voltage is present at the Master it will turn
on. When demand for product increases (more nozzles
open) the Master will call the Slave controller to turn on.
This will maintain the product ow rate in high demand
situations. In this conguration, the slave unit(s) will run
only when requested to do so by the master unit.
Alternating Circuit
The controllers will rotate being the one to turn on as the
hook voltage turns on and off. Only one controller is on
at a time in this conguration. Not available in IST-VFC
Compatibility Mode.
Master – Slave and Alternating Circuit
A combination of the above two congurations. The rst
controller to turn on rotates and when the demand for
product increases, additional controllers will be called on to
assist.
See Figure 5 wiring diagram for the RS485 connections.
16. For Master – Slave Conguration (not applicable
to IST-VFC Mode)
Set Master SW3 Pole 3 to ON, SW3 Pole 8 to
OFF, and verify that on SW2 all switches are
OFF.
Set Slave(s), verify that SW3 Pole 3 and SW3
Pole 8 are set OFF (factory default). Set SW2
switches of Slave(s) per Table 1.
Warning
Warning