Chemtrol PC3000 - Chapter I - Introduction; Water Maintenance; Reference Manuals

MANUALPC-2012 Page 1
CHAPTER I - INTRODUCTION
Congratulations on your selection of a CHEMTROL® PC
Programmable Controller for your water treatment.
CHEMTROL® Automation uses advanced electronic sensing
technology to monitor and control the most control critical
parameters in water, such as sanitizer activity, pH,
temperature, conductivity or total dissolved solids (TDS).
These are all essential for maintaining safe and enjoyable
water.
Water Maintenance
The primary purpose of water maintenance is to maintain clean
water that meets the bacteriological and physiological
requirements of state and local Health Departments, as shown,
for example, in the table for the State of California.
Equally important is the protection of the equipment from the
aggressiveness of water and its constituents.
The guidelines adopted by the National Spa and Pool Institute
(NSPI), as shown in the second table.
For chemical automation, we recommend:
- Adequate filtration with a maximum turnover rate of six
hours for a pool or 30 minutes for a spa,
- Proper water balance with a pH between 7.4 and 7.6,
alkalinity between 80 and 120 ppm (mg/l) and Langelier
Saturation Index between 0 and 0.3,
- Minimum Free Chlorine level of 1.0 ppm (mg/l) ,
- Oxidation-Reduction Potential (ORP) above 650 mV,
- Total Dissolved Solids (TDS) less than 1,500 ppm (mg/l).
- If required, stabilization not exceeding a cyanuric acid
level above 40 ppm (mg/l),
CHEMTROL® PC controllers are designed to automate and
facilitate the attainment of these goals.
Reference Manuals
For more information on water treatment, see the Maintenance
section in this Instruction Manual or refer to one of the
following reference manuals:
- “Basic Pool and Spa Technology”
National Spa and Pool Institute (NSPI)
- “Pool/Spa Operators Handbook”
National Swimming Pool Foundation(NSPF)
- “Aquatic Facility Operator Manual
National Recreation and Park Association (NRPA).
1986 CALIFORNIA HEALTH CODE
for Swimming Pools
CLARITY
Main drain to be
visible from deck.
STANDARD
PLATE COUNT
at 35
o
, per ml
TOTAL COLIFORM COUNT
per 100 ml
Less than 200
Bacteria
Less than 2.2
organisms
PHYSIOLOGICAL QUALITY
No eye or skin
irritation.
No objectionable
physiological effect.
TEST MIN IDEAL MAX
pH 7.2 7.5 7.6
FREE CL, ppm
Non-stabilized
Stabilized
Spa
1
1.5
2
1.5
2
3
2
3
5
COMBINED CL, ppm 0 0 0.2
BROMINE, ppm 2 3 4
OZONE, ppm 0.01 - 1
ORP, mV 650 750 -
CYANURIC ACID, ppm
Outdoor Pool Indoor Pool
Spa
30 0
0
40 0
0
100 0
100
TOTAL ALKALINITY, ppm 100 125 150
TDS, ppm 300 1000 3000
Based on Standards for Public Pools and Spas.
Published in 1988 by the
NATIONAL SPA AND POOL INSTITUTE