Teledyne EHE 2L-2. Start-up, 2L-3.Condensate, 2L-4.Gas Pressure, Adjustment of Pressure Switch

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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.

Pry off cap

to adjust

Figure 23. Adjustment of Pressure Switch.