16
Stop/Start Control
An external Stop/Start signal will turn the STOP LED to red and also
control the pump. In this mode, AC power is applied continuously, but
the pump operation is stopped (or started – see section on
programming) by completing the circuit between Terminal 5 and
Terminal 6. The Stop/Start signal can be a contact closure type switch
(reed) with a max load of 1mA or a solid state device. If a solid state
device is used, the external circuit should be capable of switching
5VDC at 1.2mA with an active duty cycle pulse width of 5ms to 100ms
(actual closure time).
To connect the Stop/Start input from an external device, wire Terminals 5
and 6 from the contact closure. If using a solid state switching device, wire
the connections ensuring that Terminal 5 is positive (+) and Terminal 6 is Common (-).
3.3
Adjustment
A.
EW Pumps using the ‘F’ Control Module
The pump will operate best keeping the stroke length at 100%. If less than full output is
required, set the frequency to the approximate percentage of maximum desired.
Example: Model EWB21F1-VC has maximum output of 1.8 GPH.
Desired output is 1.2 GPH. 1.2 ÷ 1.8 = 0.667 or 67%
Using the UP and DOWN arrows, set the frequency of the pump to
0.67 x 360 = 241 SPM.
For outputs less than 2% of maximum it will be necessary to also reduce the stroke
length. (Minimum recommended stroke length is 20%.) It is good practice to change
the frequency first, however, if low flows are required, a balanced turndown of speed
and stroke length will yield the best results.
B.
EK Pumps using the ‘R’ Control Module
The pump will operate best keeping the stroke length at 100%. If less than full output is
required, set the frequency to the approximate percentage of maximum desired.
Example: Model EKC21R1-VC has maximum output of 4.3 GPH.
Desired output is 3.0 GPH. 3.0 ÷ 4.3 = 0.7 or 70%
Using the UP and DOWN arrows, set the frequency of the pump to
0. 7 x 360 = 252 SPM.
For outputs less than 2% of maximum it will be necessary to also reduce the stroke
length. (Minimum recommended stroke length is 20%.) It is good practice to change
the frequency first, however, if low flows are required, a balanced turndown of speed
and stroke length will yield the best results.
+
4
5
6
Connector
Stop/Start
Input
