Rola-Chem RC554XP ORP/pH Digital Controller - Manual (Page 12)

Rola-Chem Digital Controller PN 554135 02/17/2014 Page: 12 of 20
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 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.
5.0 Operation
5.1 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 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, 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.
To verify the feed type (acid or base) adjust pH “set” level above the pH indicated on
display. The feed lamp should come on if the controller is in acid feed mode. If the controller
is in base feed, the feed lamp will come on if the pH indicated is below the pH “set” level.