IPS Controllers M920 - Operation; Overview; Startup and Shutdown

M920 & M920W pH/Dual ORP Controller Owner’s Manual
17
III. Operaon
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 sengs are used to ne
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 lter pump and verify the water ow through
the ow cell by opening the sample port valve (center) and
observing a steady stream of water. The right side valve may
need to be parally 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(Condioner)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 ow.
f. Press the Mode pushbuon 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
me (connuous or med). Please call us at 877-693-6903 for
assistance with inial sengs.