Operation; Overview; Startup And Shutdown - IPS Controllers M920 Owner's Manual

M920 & M920W pH/Dual ORP Controller Owner's Manual
III. Operation
A. Overview
The IPS-M920 compares the readings received from the Ph and ORP
sensors to the Set Levels entered for Ph, ORP1, and ORP2. If the readings
are too low or too high, the controller will turn on the feed devices for
the Dose Time entered during set up. Other settings are used to fine
tune the delivery of chemical, as well as prevent over and under dosing.
B. Startup and Shutdown
1. Startup
a. Provide power to the M920 using either Method 1 or 2 as
discussed in step 5d or 5e on page 13.
b. Turn on the filter pump and verify the water flow through
the flow cell by opening the sample port valve (center) and
observing a steady stream of water. The right side valve may
need to be partially closed to produce a steady stream. Note:
Water should pass over the pH and ORP sensors for a minimum
of 5 minutes to allow for accurate, stable readings of pH and
ORP levels from the pool or spa. ORP readings may take longer
to stabilize.
c. Check for leaks and repair if necessary.
d. Manually adjust and balance the pool or spa water to acceptable
ranges using a test kit. Note(s): 1. Use a DPD based test kit to
check the chlorine level. 2. Cyanuric Acid (Conditioner) levels
should not exceed 30 ppm for best results.
e. Verify that the green Flow LED is illuminated. Both the pH and
ORP dose outputs are disabled if there is no water flow.
f. Press the Mode pushbutton momentarily to place the
controller into the pH standby mode. The green pH standby
LED will illuminate. Select the desired pH set level and dose
time (continuous or timed). Please call us at 877-693-6903 for
assistance with initial settings.
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