Rola-Chem 554200 pH Digital Controller - Manual (Page 12)

7.0 Appendix
7.1 WATER CHEMISTRY RANGES
(These ranges are in accordance with suggested NSPI
Standards for swimming pools.)
pH: 7.4 -7.6
Alkalinity: Approx. 80-120 ppm ** (parts per million)
Higher levels may be acceptable in areas where it naturally
occurs in the local water supply.
Consult a pool professional in your area.
Cyanuric Acid: 0-50 ppm.
(Maintain at 30 ppm or less for best probe life.)*
TDS (Total Dissolved Solids): 300 - 2000 ppm
Calcium Hardness: 200-400 ppm
Free Chlorine: 1.0 - 3.0 ppm (> 700 millivolts ORP)
*20-30 ppm of cyanuric acid provides approx. 95% of the shielding effect for
chlorine.
**When using tri-chlor, recommended alkalinity is 95-125 ppm.
7.2 Typical System Installations
FILTER
**SAFETY FLOWSWITCH TO ENSURE
CIRCULATION TO CONTROL PROBES
AND INDICATOR THAT POOL
CIRCULATION IS OCCURRING. *SAFETY FLOWSWITCH FOR
PROTECTION OF HEATER AND
TO ENSURE DILUTION OF
CHEMICAL INTO POOL.
*** OPTIONAL FILTER TO
HELP KEEP MANIFOLD
AND PROBES CLEAR OF
DEBRIS.
SYSTEM USING ELECTROLYTIC CHLORINE GENERATOR
EARTH
GROUND
pH CONTROL WITH ACID PUMP
POOL
PUMP
WATER
FROM
POOL
EARTH
GROUND
*FLOWSWITCH
WATER
TO
POOL
CELL
pH
CONTROLLER
PUMP
***FILTER
HEATER
**FLOWSWITCH
ELECTRICAL
OUTLET
CONTROLLED BY
CIRCULATION
SYSTEM
MANIFOLD
CHLORINE
GENERATOR
CONTROLS
ACID
Rola-Chem Digital Controller PN 554212 6/01/2012 Page: 12 of 12