Specifications
Table 7. Water saturation index
Saturation Index = pH + AF + CF + TF -12.1
A-Factor=(AF), C-Factor=(CF), T-Factor=(TF)
Total
Alkalinity
Calcium
Hardness
Temperature
A-Factor C-Factor T-Factor
PPM
Factor
Value
PPM
Factor
Value
°F
Factor
Value
5 = 0.7 5 = 0.9 32 = 0.0
25 = 1.4 25 = 1.0 37 = 0.1
50 = 1.7 50 = 1.3 46 = 0.2
75 = 1.9 75 = 1.5 53 = 0.3
100 = 2.0 100 = 1.6 60 = 0.4
150 = 2.2 150 = 1.8 66 = 0.5
200 = 2.3 200 = 1.9 76 = 0.6
300 = 2.5 300 = 2.1 84 = 0.7
400 = 2.6 400 = 2.2 94 = 0.8
800 = 2.9 800 = 2.5 105 = 0.9
1000 = 3.0 1000 = 2.6 128 = 1.0
A saturation index of 0 is perfectly balanced
A negative saturation index has corrosive tendencies
A positive saturation index has scaling tendencies
A saturation index of +0.3 or -0.3 should be used for visible, cos-
metic pool surfaces.
NOTE The index should be maintained between +0.3
and -0.3. A positive value is more acceptable
than a negative value.
The practice of putting tablet-based sanitizers in
the skimmer basket can produce heavily chlorinated
water with very low pH in contact with metal parts of
the heater that can cause serious damage. Practices
like this should be discontinued and the use of oating
sanitizer dispensers and check valves as backow
preventers with inline erosion-style feeders should be
encouraged.
If acidic conditions are present, there could be
signs of metal in the pool water that could cause staining
on the oor of your pool. This might manifest itself
in the form of brown stains on the nish of your pool
bottom or pool water discoloration. Your local pool
dealer can test for metals in your water or can provide
you with a test kit.
Every effort should be made to maintain the
water balance of your pool or spa in the proper range.
Ignoring this very important component of your pool’s
water chemistry can make the water less enjoyable to
bathe in and result in permanent damage to your heater
and/or complete failure of individual components.
Zodiac Pool Systems, Inc. does not warrant heat
exchangers damaged by corrosive water issues or from
the build-up of calcium in the heater’s heat exchanger.
Any questions regarding proper water balance can be
directed to our product support line at Zodiac or to your
local pool dealer.
8.2 Seasonal Care
Do not operate this heater outdoors at tem-
peratures below 20 degrees Fahrenheit (°F) (-7
degrees Celsius [°C]).
CAUTION
Ne faites pas fonctionner cet appareil à l’extérieur
à des températures inférieures à 20 degrés Fahr-
enheit (
o
F) (-7 degrés Celsius [
o
C]).
ATTENTION
8.2.1 Spring and Fall Operation
During periods when the pool is only going to
be used occasionally, set the pool and spa control
temperatures to 70°F (21°C) on the Legacy, see Section
7.3.2. This prevents the pool water from becoming
chilled, and minimizes the time required to raise the
pool water back up to the desired temperature.
If the heater is not going to be used for a long
period of time, shut it down completely. Follow the
instructions found on the inside of the heater, or refer to
Figure 21 of this manual.
8.2.2 Winterizing
In areas where freezing temperatures occur in
winter and the pool or spa will not be used, have your
service technician perform the following steps:
1. Turn off the main gas valve to the heater, outside
the heater jacket.
2. Remove heater door.
3. Shut down the heater following the shutdown in-
structions found on the inside of the heater or refer
to Figure 21.
4. Remove the drain plugs from the inlet/outlet
header, and completely drain the heater before the
rst frost. See Figure 24.
5. After all water has drained from the heater, check
for mineral buildup in the openings.
6. Use compressed air to blow out any standing water
remaining in the heat exchanger.
7. Inspect the gaskets on the drain plugs and reinstall
plugs, but do not tighten.
8. Disconnect the pressure switch from the copper
tubing. See Figure 25.
Page 31
ENGLISH
Jandy
®
Legacy™ Model LRZE Pool/Spa Heater by Zodiac
®
|
Installation and Operation Manual