Five Star Sr200na, Sr200lp,, Sr333na, Sr333lp,, Sr400na, Sr400lp Water Flow Rate, Water Chemistry

WATER FLOW RATE

Maximum and minimum water flow rates required by the heater are listed below:

Table 8: Maximum and Minimum

Flow Rate in GPM

Model	Minimum Flow	Maximum Flow
200	20	120
333	33	120
400	40	120

If the water flow rate to the heater is above 120 GPM, it must be reduced by installing a manual bypass valve (Figure 17). After installing the valve, adjust the valve to bring the flow rate within the acceptable range. Then remove the valve handle or lock it in place to prevent tampering. Occasionally a two-speed pump will not develop enough pressure on the low speed to operate the heater. In this case, run the pump at high speed only to operate the heater. If this does not solve the problem, do not try to run the heater. Instead, correct the installation.

Do not operate the heater while an automatic pool cleaner is also operating. If the circulation pump suction is plugged (for example by leaves), there may not be adequate flow to the heater. Do not rely on the pressure switch in this case.

WATER CHEMISTRY

Water chemistry should follow good swimming pool water chemistry practices. See Table 9 (below) for water chem- istry parameters.

When using a chlorinator, install it downstream from the heater and at a lower level than the heater outlet. Install a corrosion resistant positive seal check valve (see Figure 15) between the heater and the chlorinator to prevent concen- trated chemicals from back-siphoning into the heater. Back-siphoning is most likely to occur when the pump stops, creating a pressure-suction differential.

Table 9: Water Chemistry Parameters

Cool Water In

Warm Water Out

2680 1096	1. Set Manual
	Bypass Valve
	2. Remove handle

Outlet to

Pool

Inlet from

Filter

FIGURE 17: Manual bypass valve

Disinfectant levels	Minimum	Ideal	Maximum
Free Chlorine, ppm	1.0	2.0-4.0	10.0
Combined Chlorine, ppm	None	None	0.2
Bromine, ppm	2.0	4-6	10.0
Other Sanitizers	Levels not established. Consult local health department before use.
Chemical Values
pH	7.2	7.4-7.6	7.8
Total Alklinity (Buffering), ppm	60	80-100	180
as CaCO3	N/A	N/A	1,500 ppm > TDS at startup*
Total Dissolved Solids, ppm
Calcium Hardness, ppm, as CaCO3	150	200-400	500-1,000
Heavy Metals	None	None	None
Biological Values
Algae	None	None	None
Bacteria	None	None	Refer to Local Code

NOTICE: Failure to adhere to the listed water chemistry parameters may result in premature failure of the heat exchanger and will void the warranty.

*Start-up TDS includes source water TDS and any other inorganic salt added at start-up.

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