Rola-Chem 554300 Dual ORP/pH Digital Controller - Manual (Page 12)

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.
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 trouble shooting if necessary.
NOTE: It is recommended that an inline filter be used to help keep the flow manifold
(including probes) and flow switch free from debris (see Manifold Operating Manual).
Debris may cause obstruction in flow switch and prevent the switch from functioning.
4.0 Operation
4.1 Startup
Do not add chemicals to the feeders until all start-up 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 blue 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). It is recommended that a flow switch always be
used.
4.2 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, upper and lower
alert levels. While still in pH mode do an initial calibration of the pH sensor. Always calibrate
using water from the sample port of the flow cell, unless using preset buffer solution. It may
take up to 24 hours before the sensors acclimate to the system so recalibrate 24 hours after the
first calibration. The pH sensor can drift slightly over time and calibration will offset this drift.
The pH sensor should be calibrated every four to six weeks.
Low feed rates can cause the feeder to lag or feeding to be extended. A high feed rate can
result in too much pH chemical being added.
In constant feed, the feed lamp will flash while feeding. The feed lamp will not activate when
the pH alert lamp is on (pH is below or above the alert settings).
If using time feed cycle, the feed lamp will flash during the feed time and be constant during
the delay time of the feed cycle.
.
Rola-Chem Digital Controller PN 554331 6/01/2012 Page: 12 of 20