Laars Lite 2 LC Installation And Operation Manual - page 12
Page 10
3E. Winterizing
In areas where freezing temperatures occur, and
you don't plan to use the pool or spa, have your service
technician perform the following steps:
1.
Shut off the gas valve and external supply line
valves.
2.
Completely drain the heater before the first
frost. To drain the heater, remove all the drain
plugs (see Fig. 14). After the heater is drained,
remove the valves. Make sure there is no
mineral buildup in the openings.
3.
Use compressed air to blow out any standing
water in the heat exchanger.
4.
Grease the threads in the header for winter
protection, but don't close them off.
5.
Disconnect the copper tubing at the pressure
switch (see Fig. 15).
3F. Water Chemistry
3F-1. For Pool
The mineral content of swimming pool water
increases daily, due to natural evaporation and the
addition of sanitizing chemicals. If you let the mineral
content get too high, the excess minerals will deposit
on the walls of the pool, the filter system, and in the
heater tubes. That is why it is important to maintain
the pH factor of the pool water between 7.2 and 7.6.
3F-2. For Spa
The control of proper chemical balance in spa
water is more critical than in a swimming pool for
satisfactory heater operation. Usage density in a spa is
many times greater than a swimming pool. The spa
size, the higher water temperature, and the heavy
usage, mean chemical values in a spa can differ
greatly. The lack of the right chemical content can
result in unsatisfactory water conditions, and affect the
life of the heater.
Maintaining sanitary water conditions in a spa
can only be done by regular water changes and the
proper addition of sanitizing chemicals.
3F-2a. Corrosion
The corrosion action of spa water is increased by
the following:
a. Low pH - acidity
b. Low total alkalinity - bicarbonates
c. Low calcium hardness - soft water
NOTE: Waterpik Technologies does not warrant heat
exchanger damages by corrosive water.
3F-2b. Testing
Waterpik Technologies recommends that owners
purchase a test kit and use it regularly. A minimum kit
will measure chlorine, alkalinity and the pH level.
The pool/spa owner should have a professional
service technician perform more extensive chemical
testing and water changing.
Figure 14. Heater Drain Locations
Figure 15. Pressure Switch Copper Tubing