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2K-4. Pressure Relief Valve
A pressure relief valve is mandatory in any
installation in which the water flow can be shut off
between the heater outlet and the pool/spa.
A pressure relief valve is not supplied with the
Hi-E2 in the United States; however, it may be
required by local codes. A pressure relief valve must
be provided in Canada.
To install a pressure relief valve, remove the 3/4"
brass plug from the top of the inlet/outlet header (See
Figure 22). Install the pressure relief valve in the
opening. Provide a short length of brass or stainless
steel pipe as necessary to position the valve above the
sheet metal cover. Turn the valve or route discharge
piping as necessary to assure that hot steam will not
endanger persons near the heater. The valve setting
should be at or below the maximum working pressure
of any component in the filter system. The working
pressure of the Hi-E2 heater is 75 psig.
2K-5. Automatic Chlorinators (Chemical
Feeders)
A high concentration of chlorine (and many
similar chemicals) in the pool heater can be very
destructive. Heater damage caused by chemical
concentration is not covered by the Teledyne Laars
Warranty. See Table 7 for guidelines on pool water
chemistry.
Figure 18. Water Connection as Shipped.
Figure 19. Water Connection Reversal.
Figure 20. Typical Water Piping.