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Page 14
operate the heater. (If the recommended fi reman
switch has been provided, it must also enable
operation.)
2.
If the FlexTemp selector switch is set to "Pool"
or "Spa", and if the water temperature is not
warm enough, the FlexTemp control signals the
combustion system to start.
3.
The ignition control starts the combustion
blower.
4.
When the venturi pressure switch detects
combustion air fl ow and when a suitable "pre-
purge" time has been allowed, the ignition
control energizes a "hot surface" igniter.
5.
The igniter is allowed to reach ignition
temperature, at which it glows bright red-orange.
This is visible through the combustion chamber
view port.
6.
The gas valve is opened and gas fl ows into
the combustion air. The gas/air mixture fl ows
through the burner into the combustion chamber.
It is ignited by the igniter.
7.
The ignition control electronically senses
successful ignition by "fl ame rectifi cation", and
the gas valve is allowed to stay on. The igniter is
de-energized.
8.
The heater operates for as long as the FlexTemp
control demands heat, subject to continued water
fl ow and satisfactory operation of the system.
9.
When the FlexTemp control stops calling for
heat, the ignition control shuts off the gas valve
and the fl ame goes out.
10. The ignition control continues to operate the
combustion blower for a "post-purge" period,
after which it is turned off.
The process is repeated upon the next call for
heat. If ignition is unsuccessful, or if the fl ame fails
during normal operation, the ignition shuts off the gas
valve. It imposes a post purge and two more ignition
cycles, and it shuts down the system if ignition is not
achieved in three cycles.
2L-2. Start-up
Before operating the heater, pour water into
the condensate tray and verify that it drains properly.
Confi rm that pool water is fl owing normally through
the pool system and equipment. Start the heater in
accordance with the Operating Instructions section of
this manual, with particular attention to the lighting
and shutdown instructions and temperature control
operation.
The heater may not start on the fi rst try. Air in
the gas line or other start-up situations may cause it to
recycle. It will lock out if ignition is not achieved in
three attempts. To provide three additional attempts,
turn the pool/spa selector switch off and then back on.
When the heater starts, immediately feel the
outlet header of the heater to confi rm that there is
adequate water fl ow. The header should not be hot.
Normally, water temperature will rise only a few
degrees as it passes through the heater, and a "hot"
header or pipe indicates low water fl ow.
WARNING
When the heater is fi red for the fi rst time, the com-
bustion chamber refractory binder material is driven
out by the heat of the fl ame. White smoke and/or
sharp odors may be emitted from the vent during
this period. Do not inhale combustion product fumes
at any time, and especially when these fumes are
being emitted. This "burn-in" period will last only a
few minutes.
2L-3. Condensate
If there is no water in the condensate trap, the
heater's combustion blower will pull air into the
lower drain hose and normal drainage of combustion
condensate will not occur. This water will accumulate
to blower inlet level and will (temporarily) be blown
out of the vent. Eventually it will drain back to the
tray and will "prime" the trap. To avoid this "wet"
start-up, simply pour water into the tray before starting
the heater, as indicated earlier.reach the blower and
will (temporarily) be blown into the vent and may be
thrown into the air around the heater.
2L-4. Gas Pressure
Confi rm that gas supply is of adequate size per
Section 2I of this manual. Confi rm that the step-down
regulator is properly set by verifying that the pressure
at the port on the inlet side of the gas valve is 1.25
- 3.0 WC with the heater operating.
Checking of gas pressure at the outlet of the
gas valve requires knowledge of the venturi system
of the Hi-E2 pool heater. Do not attempt to adjust
this pressure without thorough understanding of its
operation and settings, as outlined in the maintenance
section of this manual.
2L-4a. Step-down Gas Pressure Regula-
tor
Model Hi-E2 pool heaters include a step-down
regulator to reduce the pressure of gas entering the
combination gas valve. This regulator is factory set
between 1.25" and 3.0" WC regardless of whether
natural or LP gas is used by the heater.
The step-down regulator does not change
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