IPS Controllers M920CA Owner's Manual page 15

M920 & M920W
CA
c. Run the sensor cable into the controller through the strain relief
marked "temp" and connect to the terminal block on the front
circuit board marked "Temp".
5. Electrical Connections (Should be completed by a licensed
electrician)
a. Verify that the M920
b. Connect the pH feeder connection to the appropriate peristaltic
pump or other device.
c. Connect the ORP feeder connection to the appropriate
peristaltic pump or other device. Note: There is another
connection port for ORP2.
d. Method 1 (recommended): Connect the AC power cord to the
load-side of the circulation pump circuit. This will only provide
power to the M920
e. Method 2: Connect the AC power cord to a GFCI power source,
or separately purchased IPS Controllers PressureSwitch (part #
PS100).
f. Connect the pH sensor connector to the corresponding lower
port (labeled pH) at the right edge of the controller.
g. Connect the ORP sensor connector to the corresponding upper
port (labeled ORP) at the right edge of the controller.
6. Chemical injection must be inserted in the return line, after
(downstream) any equipment.
7. Optional connection to a Salt Chlorine Generator (SCG)
The M920 controller is capable of controlling (turning on/off) a
SCG depending on the current ORP reading. This action can be
accomplished using a 120V or 240V relay, or by connecting the SCG
to the "normally open" dry contact relay (ORP1) included with the
M920 controller. When using the ORP1 Dry Contact Relay, the black
plastic jumper identified as HD2 needs to be repositioned from the
lower position (see Figure 4) to the open pegs at the top.
pH/Dual ORP Controller Owner's Manual
CA
controller power is OFF.
CA
when the circulation pump is running.
CA
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