Seasonal Care - Jandy Lite2 Installation And Operation Manual

Model LD Pool and Spa Heater
The proper chemical balance in spa water is
more critical than in a swimming pool heater operation.
Due to the spa's size, high water temperature and
heavy usage, chemical values in a spa can vary
greatly. This chemical imbalance can result in unsani-
tary water conditions, and affect the life of the heater.
Proper chemical balances are necessary for
sanitary bathing conditions as well as ensuring your
heater's long life. Kits are available from your local
pool supply dealer for making the various tests for
mineral content. One of these kits will detect copper in
the system. This is usually a warning that corrosion is
taking place, possibly due to a low pH value combined
with other chemistry problems. The condition can be
corrected by changing the spa water and closely
monitoring the pH factor and chemical properties of
the water. Be sure to keep your chemical levels within
the values indicated in Table 7. Jandy Pool Products,
Inc. does not warrant heat exchangers damaged
by corrosive chemical levels or excess dissolved
solids in pool or spa water.
For spas, it is also necessary to perform water
changes in addition to chemical treatment. It is recom-
mended to change the spa water every 60 days for
light usage and every 30 days if usage is heavy.
Table 7. Chemical Concentration Levels*
Test
Free Chlorine or
Bromine
pH
Total Alkalinity (TA)
Calcium Hardness (CH)
Cyanuric Acid
Total Dissolved Solids (TDS)
Copper
* Concentration levels taken from "Basic Pool and Spa
Technology" published by NSPI (National Spa and Pool Institute).

8.2 Seasonal Care

CAUTION
Do not operate this heater outdoors at temperatures
below 20 degrees Fahrenheit (°F) (-7 degrees
Celsius [°C]).
ATTENTION
Ne faites pas fonctionner cet appareil à l'extérieur à
des températures inférieures à 20 degrés Fahrenheit
( o F) (-7 degrés Celsius [
Recommended Level
1.0 to 3.0 ppm (3.0 to 5.0 spa)
2.0 to 4.0 ppm (3.0 to 5.0 spa)
7.4 to 7.6
80 to 120 ppm
200 to 400 ppm
30 to 50 ppm
Less than 2000 ppm
0 ppm
o C]).
8.2.1 Spring and Fall Operation
During periods when the pool is only going to be
used occasionally, turn the temperature control down to
the MIN setting. This prevents the pool water from
becoming chilled, and minimizes the time required to
raise the pool water back up to the desired temperature.
In areas subject to only short freeze periods, turn
off the heater and run the pump continuously for the
length of the freeze period.
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 page
20 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 supply valve to the heater,
outside the heater jacket.
2. Remove heater door.
3. Shut down the heater following the shutdown
instructions found on the inside of the heater or on
page 20 of this manual.
4. Remove the drain plug from the return header
(see Figure 19), loosen the drain plug from the
inlet/outlet header, and completely drain the heater
before the first frost.
5. After all water has drained from the heater,
remove the drain plug from the inlet/outlet side.
Check for mineral buildup in the openings.
6. Use compressed air to blow out any standing
water remaining in the heat exchanger.
7. Grease the threads on the drain plugs and reinstall
plugs, but do not tighten.
8. Disconnect the pressure switch from the siphon
tube (copper tubing) (see Figure 20).
8.2.3 Spring Start-up
To restart the heater in the Spring, have a profes-
sional service technician reassemble the heater as
follows:
1. Attach the copper tubing to the pressure switch
(see Figure 20).
2. Tighten the drain plugs.
3. Turn on the filter pump and circulate water
through the heater for 5 minutes. Check for leaks
while circulating.
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