8.913-970.0 - L • WATERMAZE CLP 5024/7034
OPERA
T
OR’S MANU
AL
W
A
TER TREA
TMENT
SYSTEM
22
SENSOR MAINTENANCE
Out-of-Range Alarms
The out-of-range alarms are factory set at 450 to 650
mV for ORP and 6.5 to 7.5 for pH. If the ORP is below
the low limit, the red LED alarm fl ashes but the sanitizer
feed continues.
If the pH limits are exceeded, the red LED alarm fl ashes
and the pH feeder continues.
To change an alarm limit:
• Press [LOW LIMIT] or [HIGH LIMIT],
• Press [ORP] or [pH]; the display fl ashes,
• Use the [UP] and [DOWN] arrows to adjust the value,
• press [LOW LIMIT] or [HIGH LIMIT] again.
CAUTION: Increasing the out-of-range limits may
cause overfeeding of chemicals.
ORP AND PH SENSOR
MAINTENANCE
The controller is virtually maintenance free. The enclo-
sure and front panel can be cleaned with a soft cloth
moistened with a mild soap and water solution or a glass
cleaner. Do not use abrasives or harsh chemicals.
Sensor Cleaning/Testing
The sensor tips must be kept clean and free from
chemical deposits and con-
tamination to function properly.
After saturation in the waste
stream, the sensors may need
to be cleaned on a weekly or
monthly basis depending on
the water quality and other
facility-specifi c characteristics.
Slow response and inconsis-
tent readings are indications
that the sensors are in need
of cleaning.
To clean a sensor, carefully
remove it from the compres-
sion fi tting or holding bracket.
Clean the tip of the sensor with a mild liquid detergent
(Joy®, etc) solution. Rinse with fresh water and soak the
sensor in a mild acid solution for fi ve minutes. Rinse with
fresh water and reinstall the sensor.
To check sensor for proper operation place a small
amount of white vinegar, muriatic or hydrochloric acid
into a cup and place sensor probe into solution. For the
pH sensor, the needle should drop. For the ORP sensor,
the needle should rise.
NOTE:
Only clean one sensor at a time. Sensors must
stay in some kind of liquid at all times.
Sensor Replacement
For preventative maintenance it is also recommended
to replace the sensors on an annual basis or as perfor-
mance diminishes.
Sensor Storage
Extended exposure to atmospheric conditions will cause
the sensor tips to dry out. Always remove and properly
store the sensors if they are to be winterized or inactive.
Store the sensors with the original cap provided, making
sure that each cap is fi lled with clean water. If the stor-
age containers have been misplaced, store the sensors
individually in small glasses or plastic containers with
clean water covering the sensor tips.
Terminal Block Wiring
66-123
66-122
B W G
B W G
B W G
ORP
R W B
Power pH
Rotary
Flowswitch
Dry-Contact
Alarm
B=black, W=white, G=green, R=red
