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continued water flow 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 flame 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 flame 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.
Confirm that pool water is flowing 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 first 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 confirm that there is
adequate water flow. 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 flow.
WARNING
When the heater is fired for the first time, the
combustion chamber refractory binder material
is driven out by the heat of the flame. 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
Confirm that gas supply pressure is correct.
Measure it at the heater by connecting a manometer to
the supply pressure port on the inlet side of the gas
valve. With the heater firing, the pressure must be
within the range shown in Table 4. Also check the
pressure with the heater off.
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-5. Adjustment of Water Pressure
Switch
The pressure switch is pre-set at the factory for
normal pool installations. Do not adjust it unless the
heater water connections are more than three feet
above or below the pool surface. If they are not in this
range, the pressure switch must be adjusted. This can
be done in the field if the water connections are no
more than six feet above the pool surface and no more
than ten feet below it. For other situations, contact a
Teledyne Laars representative.
Caution
The pressure switch should be adjusted to turn
the heater off when the pump is off. Setting
the switch to close at too low of a flow can
damage the appliance.
Figure 23. Adjustment of Pressure Switch.
Pry off cap
to adjust