ºC ºF
Ti
Calcuim
Hardness
Ci
Total
Alkalinity
Ai
53
60
66
76
84
94
103
12
16
19
24
29
34
39
.3
.4
.5
.6
.7
.8
.9
How to use:
Measure pool pH, temperature, calcium hardness,
and total alkalinity. Use the chart above to determine Ti, Ci,and
Ai from your measurements. Insert values of pH, Ti, Ci and Ai
into the above equation. If Si equals .2 or more, scaling and
staining may occur. If Si equals -.2 or less corrosion or irritation
may occur.
Si = pH + Ti + Ci + Ai - 12.1
-.2
0
.2
CORROSIVE
SCALING
75
75
100
100
125
125
150
150
200
200
250
250
300
300
400
400
600
600
800
800
1.5
1.9
1.6
2.0
1.7
2.1
1.8
2.2
1.9
2.3
2.0
2.4
2.1
2.5
2.2
2.6
2.4
2.8
2.5
2.9
OK
3
1. Preparing Pool/Spa Water
General Water Chemistry
Salt is required only if you are using the chlorinator features on the Pro Logic Control. If you are NOT
using the chlorinator, it is recommended that you follow all of the other chemistry recommendations be-
sides salt. Refer to the description of the Pro Logic configuration menu for information on enabling/dis-
abling the chlorinator (see page 21).
Water Chemistry
The table below summarizes the levels that are recommended by the Association of Pool and Spa Profes-
sionals (APSP). The only special requirements for the Pro Logic are the salt level and stabilizer.
Saturation index
The saturation index (Si) relates to the calcium and alkalinity in the water and is an indicator of the pool
water “balance”. Your water is properly balanced if the Si is 0 ±0.2. If the Si is below -0.2, the water is
corrosive and plaster pool walls will be dissolved into the water. If the Si is above +0.2, scaling and
staining will occur. Use the chart below to determine the saturation index.
28
Low Speed of a 2-speed Filter Pump
– the Pro Logic will operate the aux relay whenever the
low speed operation of the filter pump is required. It is very important that the “2-speed”
filter pump option be selected under the “Filter Config.” Menu for proper operation.
Timeclock
– the aux relay will turn-on and turn-off at the times set for the aux1 timeclock in
the Timers Menu. The AUX button can also be used to turn the output on and off.
Solar
– the aux relay operates a solar booster pump which will turn on when the filter pump
is running and solar heat is available and the water is less than the desired temperature
setting. It is important to note that “Solar Control” must be enabled in the “Solar Config.”
menu for proper operation to occur.
Super Chlorinate
– if “Chlorinator” is enabled, this option allows the user to start a Super
Chlorinate cycle when the Aux button is pressed, rather than using the Settings Menu. Note
that only one button can be assigned to this function.
Aux1 Relay
This feature allows the user to select either “Standard” (default) or “Dimmer” type relay for
the Aux1 output. The optional AQL-DIM dimmer kit must be installed if “Dimmer” is desired.
When “Dimmer” is selected, and the Aux1 output is manually turned on, the “+” and “-”
buttons adjust the level from 20% to 100% (default). The level is saved for the next time the
aux1 output is turned from off to on.
Aux1 Interlock
If “Enabled”, this feature will override the function (Manual On/Off, Countdown Timer,
Timeclock), selected above and turn the aux1 off when: filter pump is off, first 3 minutes of
filter pump operation (allows the pump to prime and get water flowing), when the pool/spa
suction return valves are in any position other than “pool only”, or for the first 3 minutes
after solar turns on (allows air in the solar panels to be purged). Interlock is not available for
solar, low speed filter pump, super chlorinate or dimmer.
Aux1 Freeze Protection
This function protects the pool, plumbing, and equipment against freeze damage. If Freeze
Protection is enabled and the AIR temperature sensor falls below the selected freeze
temperature threshold, the Pro Logic will turn on the aux relay to circulate the water.
IMPORTANT: this only enables operation of the AUX output during freeze--see the “Filter
Pump Config.” menu to enable freeze protection for the main circulation system.
Valve3
Disabled
Freeze
Toggle between Enabled and Disabled (default) Valve3 Freeze
Move to previous/next configuration menu
for all functions except super chlorinate
Valve3 Config.
+ to view/change
Valve3 Function
Solar
Push to access Valve3 options
Rotates between
k
Timecloc (default), Solar, In-floor Cleaner,
and Super Chlorinate
Move to previous/next configuration menu
Move to next menu item
Valve3
Disabled
Interlock
Toggle between Enabled and Disabled (default) Valve3 Interlock
Move to next menu item
for all functions except solar and super chlorinate
Valve3 Function
Timeclock (default)
– the valve turns on/off at the times set for the valve3 timeclock in the
Timers Menu (see Operations Manual). The VALVE3 button can also be used to turn the
valve output on or off.
