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These instructions are primarily intended for use by qualified personnel specifically trained and experienced in the
installation of this type of heating equipment and related system components. Installation and service personnel may
be required by some states to be licensed. Persons not qualified shall not attempt to install this equipment nor attempt
repairs according to these instructions.
MECHANICAL
PROBLEM
CAUSE
SOLUTION
Harmonics, or whining noise
U.G.inoperative................................. Check movement by putting in hot water (110°F
or higher). If no movement, replace.
*Debris or restriction in system....... Locate the restriction and remove. Flush system
and clean.
*Debris in gas line.............................. Remove debris or blow out gas line.
Lowflow.............................................. Scale forming in heat exchanger - clean heat
exchanger and check pool pH and total alkalinity.
Heater going on and off
Dirty filter............................................. Backwash filter.
continuously
Low water level in pool.................... Raise water level.
External bypass setting out of
adjustment......................................... Adjust bypass.
*Pressure switch out of
adjustment......................................... Adjust pressure switch.
Liming or scale forming on
Pool water chemical imbalance.... See Water Chemistry on page 2.
heat exchanger
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High flow rates.................................. Reduce by adding manual bypass valve and
adjust by putting thermometer in header (1/4"
NPT) drain opening. Set bypass so thermom-
eter reads between 105° and 110°F.
U.G.inoperative................................. Check movement by putting in hot water (110°F
or higher). If no movement, replace.
*Airstarvation....................................... Refer to installation instructions.
*Improper venting............................... Follow recommended installation instructions.
*Insects or debris clogging
burner intake ports........................... Clean burners.
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Restricted pilot.................................. Clean pilot.
Weak pilot generator........................ Replace pilot.
Yellow lazy flame
Low gas pressure............................ Adjust gas pressure.
*Insects or debris clogging
burner intake ports........................... Clean burners.
Outer jacket very hot
*Broken refractory caused by
(paint blistered)
shipping damage or improper
combustion........................................ Replace refractory panels.
Excessive sooting of heat
exchanger........................................... Determine cause of sooting & correct.
Takes long time to heat
Undersized heater............................. Check heat rise per hour with the following
pool or spa
formula:
Heat rise (°/hr.)= Heater Output
Pool gallonage x 8.33
Filter not running long enough....... Reset time clock.
Dirtyfilter............................................. Clean filter.
Gas line or meter undersized......... Refer to installation instructions.
(* Usually occurs on initial start-up.)
TROUBLESHOOTING
