72-910-02
REV. P
7
Pre-wired controllers are supplied with 6 ft (1,8 m), 18 AWG (1,2 mm
2
) 3-wire grounded power
cords and clearly marked 18 AWG (1,2 mm
2
) 3-wire grounded receptacle cords for all controlled
line voltage outputs.
Controllers that are to use electrical conduit are factory pre-drilled with easily accessible connections
for hard wiring of input and output power connections. Use only 16 AWG (1,5 mm
2
) or 18 AWG
(1,2 mm
2
) wire for conduit power and load connections.
3.1 Electrical Connections
2
If your controller was not ordered as a pre-wired controller, hard wiring will be required. With the
main power disconnected from the controller, loosen the four screws that retain the front panel of the
controller and remove the front panel. There are five terminal block connectors inside the controller
that will need to be wired.
Supply power
The controllers supply power is identified on the main PC board as location PL3 (refer to
Fig. 3 on page 8). There are three connections identified on the board for this terminal block,
HOT (LINE), RTN (return or Neutral), and Ground.
Flow and Water Meter Inputs
These two inputs are located on connector PL2. This is where the two wires from the flow
switch or water meter will connect. Polarity on this terminal block is not important.
If your controller is not equipped with a flow switch, there should be a jumper
wire installed across PL2. (See
Fig.3
)
Dose/Feed (metering pump)
This control output is identified on the controller PC board as location PL4. The terminal
block connections for PL4 are HOT (LINE), RTN (return or Neutral), and Ground.
This control output can drive pumping equipment based on the bleed and feed with limit
timer mode. This output energizes when the programmed conductivity set point is exceeded.
This output will de-energize when the conductivity reading falls below the set point minus
the fixed set point differential (-5% of set point) or when the programmed feed limit time is
exceeded.
Optional - This output energizes for a programmed percentage of a fixed 10 minute feed
cycle.
The controller is fused at 5 amps maximum. Both output devices combined can
not exceed 5 amps of current.
2
Trained service personnel are required for all electrical connections. This product does not contain operator serviceable
parts.
