MANUAL
CT
Controllers
STARTUP
Page 58
If the test kit value differs from the value shown on the controller
display, select pH Menu and Calibration Submenu and enter the
value indicated by the test kit, using the 1-Point Calibration
option.
For more accurate calibration with 2 or 3 points, repeat the same
process at two or three different pH values using calibrated
standard solutions of appropriate values. Most common values
are for pH 4.0, 7.0 and 10.0.
pH Feed (Acid or Base)
The CHEMTROL®
CT
Controller
has both Acid and Base
feed outlets for pH control. Acid Feed is activated when the
pH is above the setpoint and Base Feed when it is below the
setpoint.
In most cases, only one type of chemical is required, i.e. either
acid or base, depending mostly on the type of sanitizer used.
Make sure to connect the acid or base chemical feeder to the
proper outlet on the Power Board (see the INSTALLATION
chapter).
pH Setpoint
The default value for the pH setpoint is 8.5. It can be modified at
any time through the pH Menu.
ORP Calibration
The ORP sensor is direct reading and does not require
calibration.
ORP Setpoint
The default value for the ORP setpoint is 700 mV. It can be
modified at any time through the ORP Setpoint Submenu.
The controller will automatically activate the chlorinator,
brominator or ozonator whenever the reading is below the ORP
deadband. It will stop automatically as soon as the reading is
above the ORP setpoint.
ADDITIVES Feed
The CHEMTROL®
CT
Controller
has four (4) feed outlets
for
chemical additives
such
as
inhibitors,
biocides,
descalers, etc. Each additive Feed can be controlled
manually, automatically (bleed & feed, bleed-then-feed), on
cycle timer, as a percent of flow, or following a daily schedule.
In most cases, corrosion and scale inhibitors are fed
automatically or on percent of flow, while biocides are fed on
daily schedule.
Time Limits
The Time Limits for each outlet should be set for the length of
time that can be safely tolerated for chemical overfeeding - in
case of equipment malfunction or operator error. This time varies
with each installation, based on the size of the installation
(gallons of water) and the feed rate of the chemical feeders.
If needed, see your CHEMTROL®
CT
Controller
Qualified
Dealer for assistance.
Shock Treatment
It is recommended to wait several weeks before using the
automatic superoxidation cycle, or until all the other
operating functions of the controller have been properly
tested out.
SATURATION INDEX
The CHEMTROL®
CT
Controller
features automatic
calculation of the Langelier Saturation Index (Submenu
8.2.3).
It is recommended to check the water saturation as soon as
possible after installation to prevent damage to the
equipment through corrosion or scaling. This should be
done immediately after calibration of the pH and temperature
sensors, using a reliable test kit to obtain the alkalinity and
calcium hardness values.