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IMPORTANT NOTICE
These instructions are primarily intended for the use of 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 (FOR QUALIFIED SERVICE PERSONNEL ONLY)
PROBLEM
Harmonics, or whining noise
Heater going on and off
continously
Liming or scale forming on
heatexchanger
Sooting
Pilot outage
Yellow lazy flame
U.G. Inoperative……………………
*Debris or restriction in system……
*Debris in gas line…………………..
Lowflow……………………………...
Dirty filter……………………………
Low water level inpool..……………
External bypass setting out of
adjustment…………………………..
*Pressure switch out of
adjustment…………………………..
Pool water…………………………....
High flowrates…………………….....
U.G. Inoperative……………………..
*Airstarvation………………………..
*Improper venting…………………....
*Insects or debris clogging
burnerintake ports…………………..
Lowgas pressure…………………....
Restricted pilot……………………....
Weak pilot generator………………..
Lowgas pressure…………………....
*Insects or debris clogging
burnerintake ports…………………..
Check movement by putting in hot
water (110°F or higher). If no move-
ment, replace.
Locate the restriction and remove.
Flush system and clean.
Remove debris or blow out gas line.
Scale forming in heat exchanger -
clean heat exchanger and check
pool pH and total alkalinity.
Backwash filter.
Raise water level.
Adjust bypass
Adjust pressure switch
Recommended pH should be be-
tween 7.3 and 7.8 total alkalinity100-
150PPM maximum. Hardness -150-
400 PPM maximum. (see page 2)
Reduce by adding manual bypass
valve and adjust by putting ther-
mometer in header (1/4" NPT) drain
opening. Set bypass so thermome-
ter reads between 105° and 110°F.
Check movement by putting in hot
water (110°F or higher). If no move-
ment, replace.
Refer to installation instructions.
Follow recommended installation
instructions.
Clean burners
Adjust gas pressure.
Clean pilot.
Replace pilot.
Adjust gas pressure.
Clean burners.
CAUSE
SOLUTION
*Usually occurs on initial start-up
TROUBLESHOOTING