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WATER CHEMISTRY
NOTE: Corrosive water voids all warranties.
Chemical imbalance can cause severe damage to your
heater and associated equipment. Maintain your water chem-
istry according to Table 1. If the mineral content and dissolved
solids in the water become too high, scale forms inside the
heat exchanger tubes, reducing heater efficiency and damag-
ing the heater. If the pH drops below 7.2, this will cause corro-
sion of the heat exchanger and severely damage the heater.
Heat exchanger damage resulting from chemical imbalance is
not covered by the warranty.
For your health and the protection of your pool equipment,
it is essential that your water be chemically balanced. The fol-
lowing levels must be used as a guide for balanced water.
CAUTION
FREE CHLORINE MUST NOT EXCEED 5 PPM WHICH CAN
DAMAGE THE HEATER AND VOID THE WARRANTY.
WATER CHEMISTRY TIPS
• Occasional chemical shock dosing of the pool or spa water
should not damage the heater providing the water is bal-
anced.
• Automatic chemical dosing devices and salt chlorinators
are usually more efficient in heated water, unless con-
trolled, they can lead to excessive chlorine level which can
damage your heater.
• Further advice should be obtained from your pool or spa
builder, accredited pool shop, or chemical supplier for the
correct levels for your water.
AUTOMATIC CHLORINATORS / CHEMICAL FEEDERS
All chemicals must be introduced and completely diluted
into the pool or spa water before being circulated through the
heater. Do not place sanitizing chemicals in the skimmer.
High chemical concentrations will result when the pump is not
running (e.g. overnight).
Chlorinators must feed downstream of the heater and have
an anti-siphoning device to prevent chemical back-up into the
heater when the pump is shut off. See Figure 1.
NOTE: High chemical concentrates from feeders and
chlorinators that are out of adjustment will cause
rapid corrosion to the heat exchanger. Such damage
is not covered under the warranty.
Page ii
Water Chemistry
Recommended Level(s) Fiberglass Pools Fiberglass Spas Other Pool & Spa Types
Water Temp. (Deg. F) 68 to 88 89 to 104 68 to 104
pH 7.3 to 7.4 7.3 to 7.4 7.6 to 7.8
Total Alkalinity (PPM) 120 to 150 120 to 150 80 to 120
Calcium Hardness (PPM) 200 to 300 150 to 200 200 to 400
Salt (PPM)
6000 MAXIMUM 6000 MAXIMUM 6000 MAXIMUM
Free Chlorine (PPM)* 2 to 3 2 to 3 2 to 3
Total Dissolved Solids (PPM)
3000 MAXIMUM 3000 MAXIMUM 3000 MAXIMUM
Skimmer
Pool
Check Valve
Check Valve
Pump
Filter
Heater
Auto-Chlorinator
Return to Pool
Table 1. Water Chemistry.
Figure 1. Pool/Chlorinator Setup.
*Free Chlorine Must Not Exceed 5 PPM!