Laars Lite 2 LC Installation And Operation Manual - page 13
Model LC (Australia) Pool and Spa Heater
Page 11
Table 6. Chemical Levels
RECOMMENDED
TEST
LEVEL
Free Chlorine
1.0 - 3.0 ppm
or
Bromine
2.0 - 4.0 ppm
pH
7.2 to 7.6
Total Alkalinity
100 to 150 ppm
(TA)
Calcium Hardness
200 to 400 ppm
(CH)
Langelier Saturation
-0.5 to +0.5
Index (SI)
Cyanuric Acid
30 to 150 ppm
Total Dissolved
2000 ppm
Solid (TDS)
Copper
0 ppm
3G. Therapeutic Spa Safety Rules
The following safety rules, recommended by the
U.S. Consumer Product Safety Commission, should be
observed when using the spa:
1.
Spa or hot tub water temperature should never
exceed 40°C. Thirty-eight (38)°C is considered
safe for a healthy adult. Special caution is
recommended for young children.
2.
The drinking of alcoholic beverages before or
during spa or hot tub use can cause drowsiness
which could lead to unconsciousness, and subse-
quently result in drowning.
3.
Pregnant women beware! Soaking in water
above 39°C can cause fetal damage during the
first three months of pregnancy (which could
result in the birth of a brain-damaged or de-
formed child). If pregnant women are going to
use a spa or hot tub, they should make sure the
water temperature is below 38°C.
4.
The water temperature should always be checked
with an accurate thermometer before entering a
spa or hot tub. Temperature controls may vary by
as much as 2.5°C.
5.
Persons with a medical history of heart disease,
diabetes, circulatory or blood pressure problems
should consult their physician before using a hot
tub or spa.
6.
Persons taking any medication which induces
drowsiness (e.g., tranquilizers, antihistamines, or
anticoagulants) should not use spas or hot tubs.
7.
Prolonged immersion in hot water can induce
hyperthermia.
Hyperthermia occurs when the internal body
temperature reaches a level several degrees above the
normal body temperature of 37°C. Symptoms include
dizziness, fainting, drowsiness, lethargy, and an
increase in the internal body temperature. The effects
of hyperthermia include:
•
Lack of awareness of impending hazard
•
Failure to perceive heat
•
Failure to recognize need to leave spa
•
Physical inability to leave spa
•
Fetal damage in pregnant women
•
Unconsciousness resulting in a danger of drown-
ing
3H. Swimming Pool Energy Saving Tips
Waterpik Technologies offers the following
recommendations to help conserve fuel and minimize
the cost of operating your pool heater without sacri-
ficing comfort.
1.
The most healthful swimming temperature is
25°C. Always use an accurate pool thermometer.
A difference of 3 °C degrees, from 25 to 28°C,
will use as much as 40% more gas.
2.
Find the proper setting on the pool heater tem-
perature control and use the TEMP-LOK to
discourage further adjustments.
3.
Set the filter time clock to start the pump no
earlier than 6:00 AM during the pool heating
season. This is the time when nightly heat loss
stops.
4.
If the pool is only going to be used on weekends,
reduce the heater temperature control setting by 8
or 10 degrees during the week. Reset it to the
25°C level a day or so before you plan to use the
pool.
5.
During the winter or when on vacation for longer
than a week, follow the instructions in Section
3C to shut down the heater.
6.
Where possible, shelter the pool from prevailing
winds with well-trimmed hedges or other land-
scaping, cabanas, or fencing.