ROLA-CHEM Digital Controller PN 554135 5/04/2017 Page: 12 of 20
The flow switch light on the face of the controller is also a power light that shows that the
controller is connected to a live power source. If the terminal does not have a closed circuit,
the controller will not turn on.
NSF certification of this automated controller requires the use of a flow switch. To install a
flow switch, remove the jumper and install the flow switch leads. Note: With the flow switch
installed and the jumper removed, the flow light will no longer operate as a power light. It is
recommended the jumper be retained to assist in troubleshooting if necessary.
Note: It is recommended that an inline filter be used to help keep the
Globe Flowcell (including probes) and flow switch free from debris (see Globe Flowcell
Operating Manual). Debris may cause obstruction in flow switch and prevent the
switch from functioning.
5. Operation
5.1 Startup
Do not add chemicals to the feeders until all
startup operations are completed. Using a DPD
test kit, manually adjust and balance the pool to acceptable ranges. Automation should be
used to maintain chemical levels, not to balance a pool that is far out of acceptable ranges.
With the controller in the OFF mode, turn the filter pump on and check for leaks in the
system and flow through the flow cell. The flow lamp will be illuminated if the controller has
power, it is connected to the flow switch and there is adequate flow. If a flow switch is not
attached, the flow lamp will be illuminated if there is a jumper in the flow cell connection
allowing the controller to be used without a flow switch. Using a flow switch is always
recommended.
5.2 pH settings
Press and release the controller MODE button until the pH LED is lighted (refer to the
description of controls). Then select the desired set level, feed time cycle and upper and
lower alert levels.
Note: Controller can be set to feed acid or base. See Acid/Base pH chemical feed section
in Appendix for Dip switch settings. To verify that acid feed mode is selected adjust the pH
set level below the pH indicated on the display. The feed lamp should come on if the
controller is in acid feed mode. To verify that base mode is selected adjust the pH set level
above the pH indicated on the display. The feed lamp should come on if the controller is in
base feed mode.
5.3 pH Calibration
The pH sensor can drift slightly over time and calibration will offset this drift. Always calibrate
using water from the sample port of the flow cell and use an independent pH test method to
determine pH value of sample, unless using preset buffer solution. Press and release the
