Trane TR250 Service & Installation Manual page 8

8
ing spa water regularly and maintaining the correct chemical balance in your pool/spa will keep the pool/spa
safe and sanitary, and will help protect the heat exchanger. Use a 4-way pool/spa water test kit to check your
water frequently (at least weekly). Use the following guidelines to help protect your heater's heat exchanger:
3. SKIMMER CHLORINATION
Placing chlorine or bromine tablets directly into the skimmer may result in high chemical concentrations
fl owing through the heater. DO NOT place chlorine or bromine tablets in the skimmer.
4. CHLORINATOR INSTALLATION
Chlorinators must be installed downstream of the heater, and a check valve must be installed between the
heater and chlorinator to prevent high chemical concentrations from back fl owing into the heater. Make sure your
piping arrangement meets the chlorinator installation requirements shown on page 26.
Chlorine
Bromine
pH
Total Alkalinity
Calcium Hardness
Salt
5. BYPASS
Until water chemistry is properly balanced, and if your piping has a bypass valve installed for the heater,
open the bypass so that corrosive and potentially damaging water will not fl ow through the heater and there-
fore the heat exchanger. Close the bypass valve once the water is properly balanced. Failure to close the
bypass valve when attempting to operate the heater will result in extensive damage to the heat exchanger.
Ensure water fl ow through the heater is restored before operating the heater. A bypass feature is also advanta-
geous for service needs and for the ability to remove the heater from the water path when not heating. Refer
to page 25 for further information.
Recommended
Effect of Low Levels
Level
1 - 3 ppm
hazy water, algea growth,
bacteria causing infections
2 - 4 ppm
corrosive to heat exchanger,
7.4 - 7.6
swimmer irritation
corrosive to heat exchanger,
80 - 120 ppm
large fluctuations in pH
200 - 400 ppm corrosive to heat exchanger
2700 - 5000 ppm poor salt chlorinator performance
Effect of High Levels
swimmer irritation, bleaching of clothes/hair,
corrosive to heat exchanger
cloudy water, scaling of heat exchanger,
reduced sanitizer effectiveness
scaling of heat exchanger
scaling of heat exchanger
corrosive to heat exchanger