8.913-970.0 - L • WATERMAZE CLP 5024/7034
21
W
A
TER
TREA
TMENT
SYSTEM
OPERA
T
OR’S MANU
AL
STANDARD ORP/PH CONTROLLER
PROPORTIONAL
CONTROL
SAFETY
TIMER
SETPOINT
pH
CALIBRATION
LOW LIMIT
HIGH LIMIT
OFF MANUAL AUTO
OFF MANUAL AUTO
ALARM
FEED
ORP
pH
ALARM
FEED
ORP / pH
DIGITAL CONTROLLER
WATER MAZE
®
250
24V 50/60Hz 5A
MANUFACTURED BY SANTA BARBARA CONTROL SYSTEMS - SANTA BARBARA CALIFORNIA 93111 USA
STANDARD ORP/PH DIGITAL
CONTROLLER - MODEL 250
Operation
The Oxidation Reduction Potential (ORP) and pH of the
water stream are controlled automatically by the digital
controller. The controller receives input from the ORP
sensor on the activity of the sanitizer and input from the
pH sensor on the pH level of the waste stream. The level
of ORP and pH being sensed, and the requested levels
programmed in the controller will determine if outputs
from the controller are sent to the feed pumps. If sani-
tizer or pH adjust are needed, the output will turn the
corresponding feed pump on. This will inject the required
sanitizer or pH until programmed levels are reached and
feed pump will stop.
If ORP or pH adjustment is needed the ozone pump will
also turn on. The chemical is injected at the outlet of the
ozone pump. If ORP is needed the controller also turns
on the ozone generator. All will run until setpoint levels
are reached.
Acid/Base Switching
Because most systems are dealing with a high pH situ-
ation, the controller is factory set for acid feed. If you
require a base feed, open plastic door on controller and
push the up and down arrows at the same time and let
go. To toggle between acid (Ac) or base (bA) push the
up arrow once then let the controller go though its start
up procedure. Close plastic door.
Feed Mode
The feed mode for the pH and sanitizer can be set to
"OFF", Manual or Automatic. Set to Automatic. To select
the desired feed mode, press [ORP] or [pH] until the
corresponding LED indicator light is illuminated. There
is a short delay before activation.
NOTE:
Holding the
switch for more than 5 seconds resets the setpoint and
calibration for [ORP] or [pH] to original factory values.
ORP Control Setpoint
The ORP setpoint is factory set at 550 mV, which is
recommended to maintain water quality by killing germs
and bacteria. There is no need for ORP calibration.
The sanitizing concentration required to generate a
desired ORP value varies with pH and overall water
quality, particularly Total Dissolved Solids (TDS) con-
centration and organic load.
To change the ORP control setpoint:
• Press [SETPOINT],
• Press [ORP]: the display fl ashes,
• Use the [UP] and [DOWN] arrows to adjust the
ORP value,
• Press [SETPOINT] again to save the new value.
pH Calibration
To calibrate the pH, use a reliable, fresh test kit (Phenol
Red). Note the value of the pH and compare it to the
display value.
To change the pH calibration:
• Press [CALIBRATION],
• Press [pH]: the display fl ashes,
• Use the [UP] and [DOWN] arrows to adjust the
pH value,
• Press the [CALIBRATION] again to save the new
value.
pH Control Setpoint
The pH setpoint is preset at 6.8. To change the pH
control setpoint:
• Press [SETPOINT],
• Press [pH]: the display fl ashes,
• Use the [UP] and [DOWN] arrows to adjust the
pH value,
• Press [SETPOINT] again to save the new value.
