WHISPERFLOXF
®
VS and MAX-E-PROXF
®
VS Commercial Variable Speed Pump Installation and User’s Guide
5
External Control via RS-485
The following instructions only apply to pumps
manufactured after December 2020. For all other
pumps, refer to External Control via Digital Inputs on
page 6.
When paired with the RS-485 Automation Wiring Kit
(P/N 356324Z - Black) the pump can be externally
controlled by a control system through an RS-485
communication cable.
Note: When externally controlled via RS-485, the
pump can only operate in Speed Mode. To operate in
Flow Mode digital inputs must be used.
Note: IntelliConnect
®
Control and Monitoring Systems
can NOT externally control this pump via RS-485.
The pump will need to be connected via digital inputs.
Refer to External Control via Digital Inputs, page
6.
Note: If the pump is manually stopped using the
Start/Stop button, the pump will not run until the
Start/Stop button is pressed. If the Start/Stop LED is
illuminated, the pump is active and can be controlled
externally.
Only the GREEN and YELLOW conductors will be used
to wire the pump for external control via RS-485. See
Figure 4.
Refer to the control system manual for specic details
on connecting and programming. Control systems using
older rmware may require the pump to be designated
as “IntelliFlo VS".
YELLOW
GREEN
Automation System
COM Port
Note: Only the GREEN and
YELLOW wires will be used. All
other wires should be cut off at the
cable sheath.
From
Pump
4
3
2
1
Figure 4
TO WIRE FOR EXTERNAL CONTROL USING RS-485:
1. Route the communication cable from the Pump
Com Port (Figure 5) to the control system wiring
compartment.
2. Ensure the cable reaches all necessary terminals
and cut to the necessary length.
3. Strip the cable 3/4" (19 mm).
4. Strip the 24 AWG GREEN and YELLOW conductors
1/2" (13 mm).
5. Cut back and terminate unused conductors
according to local and national electrical codes.
6. Connect YELLOW and GREEN conductors to the
control system as shown in Figure 4.
7. Program the pump's internal clock and pump
address. Refer to Setting the Clock and Pump
Address, page 8.
8. Set PROGRAM 1 to a speed of 0 RPM and
duration of 24 hours. Refer to Programming Custom
Schedules on page 8.
9. Disable priming at the pump. Priming duration and
speeds will be controlled by the control system.
Note: If priming is not disabled at the pump,
priming will continue to be controlled by
the pump’s programming. Refer to Priming
Adjustment, page 11.
10. Plug the communication cable into the pump’s Com
Port (Figure 5).
Figure 5
COM Port
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