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Hi-E2
fl ange design. With this feature, a variety of piping
materials and sizes can be used at the heater. 1-1/2"
PVC or 2" copper pipe can be connected directly to
the heater using the rubber "donut" gaskets provided
with the heater. 2" PVC or metal pipe can be threaded
directly to the fl anges and 1-1/2" schedule 40 metal
pipe can be used with the rubber donut gaskets (see
Figure 22).
2K-4. Pressure Relief Valve
A pressure relief valve is mandatory in any
installation in which the water fl ow 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 23). 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 fi lter 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
Figure 22. Piping to heater.
Method For Installing
Any Threaded Pipe
Use
Plastic
Sleeve
For Nonthreaded Pipe
or Tube, Discard
Plastic Sleeve
destructive. Heater damage caused by chem i cal
concentration is not covered by the Warranty. See
Table 7 for guidelines on pool water chemistry.
IMPORTANT: If an automatic chlorinator
is being used, equip the chlorinator with an anti-
siphoning device so that chlorine will not siphon into
the heater after the pump shuts off.
Wire an electric chlorinator so that it cannot
operate unless the fi lter pump is running. If the
chlorinator has an independent clock control,
synchronize it with the fi lter clock.
If the chlorinator is equipped with its own pump,
install it so that it introduces the chlorine downstream
from the heater, and, if possible, below the level of the
heater outlet fi tting.
2L. Start-up and Adjustment
2L-1. Normal Operation
The Hi-E
pool heater operates automatically. It
2
provides heat in response to the selector switch and
temperature settings on the FlexTemp control panel on
the front of the heater. The heater has internal controls
to sense adequate water fl ow and to handle any
abnormal condition.
Normal operation is as follows:
1.
The pool/spa system fi lter pump provides water
fl ow. A pressure-fl ow switch in the heater detects
water fl ow and enables the FlexTemp control to
Figure 23. Pressure relief valve installation.
Page 13
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