ROLA-CHEM Digital Controller PN 554135 5/04/2017 Page: 17 of 20
8. Appendix
8.1 Dip switch settings
The controller has dip switches to control functions/options that are not accessible on the front panel. These
dip switches are located inside the power panel access cover. See section 4.3. To avoid overfeed conditions
the Consecutive Feed Alert Limit (switch #2) should remain in the ON position. *Factory settings are
underlined below.
Control Switch
Description
ORP/pH interlock
#1 OFF
ORP chemical feeding is independent of pH feeding and range.
#1 ON
ORP chemical feed only when pH is within limits.
ORP will not feed when pH chemical is feeding.
Consecutive Feed Alert Limit -Timed feed mode (Feed time set to a value other than “con” or “off” on Controller
front panel)
#2 OFF
There is no consecutive feed limit.
#2 ON
The pH & ORP chemical feeder outputs go through a preset number of
consecutive feed cycles before feeders are disabled. If preset count is
reached for either pH or ORP, the respective feeder outputs will be disabled
and its display will flash indicating a Consecutive Feed Alert.
The number of consecutive feed cycles on model RC554XP is 20 to 100
(default is 20) and can be independently set for both pH and ORP. The range
on 554000 is 3 to 20 (default is 10).
Setting consecutive feed cycle limit to OFF voids NSF certification.
To adjust the Consecutive Feed Alert Limit feature in the 'timed feed mode'
1) Turn off & remove power, then move #2 dip switch to ON.
2) Re-power & press MODE to set it for ORP or pH.
3) Set FEED TIME to OFF.
4) Press FEED ONCE to select the feed count.
5) Press FEED TIME and return the time to the desired cycle.
Consecutive Feed Alert Limit -Continuous feed mode (Feed time set to 'con' on Controller front panel)
#2 OFF
There is no consecutive feed limit.
#2 ON
The pH & ORP chemical feeder outputs continuously feed for a preset time
before feeders are disabled. If the preset time period is reached for either
pH or ORP, the respective feeder output will be disabled and its display will
flash indicating a Consecutive Feed Alert.
The Consecutive Feed Alert Limit period can be set from 20 to 180 minutes
on model RC554XP (default is 20) and can be independently set for both pH
and ORP. The range on 554000 is 10 to 99 (default is 10).
Setting consecutive feed time limit to OFF voids NSF certification.
To adjust the Consecutive Feed Alert Limit feature in the 'Continuous feed
mode'
1) Turn off & remove power, then move #2 dip switch to ON.
2) Re-power & press MODE to set it for ORP or pH.
3) Set FEED TIME to ‘con’.
4) Press FEED ONCE button to select the default feed time.
Acid/Base pH chemical feed
#3 OFF
Unit set to feed acid chemical when pH is over set-point.
#3 ON
Unit set to feed base chemical when pH is under set-point.
Keypad Lockout
#4 OFF
Key pad operable to set controller parameters.
#4 ON
Key pad operable only for pH calibration. Other parameters stay at settings
established prior to moving dip switch #4.
