Hayward CAT 3500 CAT 3500 Owners Manual - Page 8

Pool Chemistry, Configuration

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Pool Chemistry Now that your new controller has been physically installed, water chemistry should be tested and adjusted prior to initiating automated control of the pool or spa. Confirm that your pool or spa water conforms to the following ranges before powering on and setting up the CAT 3500. The table below indicates generally accepted guidelines. Always maintain water chemistry according to standards set by your local or State Health Department. Test Minimum Ideal Maximum pH 7.2 7.5 7.8 Free Chlorine (PPM) 1 2 3 Bromine (PPM) 2 3 4 Cyanuric Acid (PPM) 0 - 100 ORP (mV) 650 - - Total Alkalinity 80 - 120 Calcium Hardness 200 - 400 All CAT water quality controllers maintain sanitizer levels (chlorine, bromine, ozone, etc.) based on ORP. Although ORP is a superior index of water quality compared to part per million sanitizer residual levels, factors such as pH, cyanuric acid concentration and total dissolved solids can affect sanitizer residual readings relative to ORP. CAT Controllers recommends establishing desired pH, sanitizer residual, calcium hardness, total alkalinity, temperature and cyanuric acid levels prior to initiating automated control of the pool or spa. The ORP setpoint will need to be changed periodically as described later in this section if the goal is to provide consistent sanitizer residual levels rather than consistent control of ORP. Configuration Overview The CAT 3500 features a bright, menu-driven vacuum-fluorescent display which makes setup and programming simple in any lighting conditions. The menu structure is divided into two sections; the Operating Menu is intended for the end user to manage settings which are accessed on a frequent basis, while the Configuration Menu is used to set up advanced features which truly customize the controller to meet the individual requirements of the application. The keypad provides intuitive access to the controller functionality as described on the following page. 7 USE ONLY HAYWARD GENUINE REPLACEMENT PARTS

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USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
7
Pool Chemistry
Now that your new controller has been physically installed, water chemistry should be tested and
adjusted prior to initiating automated control of the pool or spa. Confirm that your pool or spa water
conforms to the following ranges before powering on and setting up the CAT 3500.
The table below indicates generally accepted guidelines. Always maintain water chemistry accord-
ing to standards set by your local or State Health Department.
Test
Minimum
Ideal
Maximum
pH
7.2
7.5
7.8
Free Chlorine (PPM)
1
2
3
Bromine (PPM)
2
3
4
Cyanuric Acid (PPM)
0
-
100
ORP (mV)
650
-
-
Total Alkalinity
80
-
120
Calcium Hardness
200
-
400
All CAT water quality controllers maintain sanitizer levels (chlorine, bromine, ozone, etc.) based
on ORP. Although ORP is a superior index of water quality compared to part per million sanitizer
residual levels, factors such as pH, cyanuric acid concentration and total dissolved solids can affect
sanitizer residual readings relative to ORP.
CAT Controllers recommends establishing desired pH, sanitizer residual, calcium hardness, total
alkalinity, temperature and cyanuric acid levels prior to initiating automated control of the pool or
spa. The ORP setpoint will need to be changed periodically as described later in this section if the
goal is to provide consistent sanitizer residual levels rather than consistent control of ORP.
Configuration
Overview
The CAT 3500 features a bright, menu-driven vacuum-fluorescent display which makes setup and
programming simple in any lighting conditions. The menu structure is divided into two sections; the
Operating Menu is intended for the end user to manage settings which are accessed on a frequent
basis, while the Configuration Menu is used to set up advanced features which truly customize the
controller to meet the individual requirements of the application.
The keypad provides intuitive access to the controller functionality as described on the following
page.