Troubleshooting - Raypak AVIA 264A Installation And Operation Manual

10. TROUBLESHOOTING

IMPORTANT NOTICE: These instructions are intended for the use of qualified personnel who are 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.
Problem
Harmonics, or whining noise
Heater going on and off
continuously
Liming or scale forming in
exchanger
Sooting
Takes too long to heat pool or
spa
Leaking at heat exchanger
Gasket brittle and leaking -
(overheated)
* Indicates symptom which usually occurs on initial start-up.
Possible Cause
Unitherm governor inoperative ................
*Debris or restriction in system ...............
*Debris in gas line...................................
Low flow..................................................
Dirty filter ................................................
Low water level in pool ...........................
External bypass setting out of
adjustment ..............................................
Pressure switch out of adjustment..........
Pool water...............................................
Bypassing too much water .....................
Unitherm governor not functioning .........
High flow rates ........................................
Unitherm governor inoperative ...............
*Air starvation .........................................
*Improper venting ...................................
*Insects or debris clogging burner intake
ports........................................................
Under-sized heater .................................
Filter not running long enough ................
Dirty filter ................................................
Gas line or meter undersized .................
Overacid .................................................
Heater running after pump shuts off .......
Refractory damage .................................
Sooted heater .........................................
Corrective Action
Check movement by putting in hot water (above120°F [49°C]
or higher)
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
Clean or replace filter
Raise water level
Adjust bypass
Adjust pressure switch
See Water Chemistry on page 5
Inspect bypass for movement, if no movement, replace
Replace if no movement when heated
Reduce by adding manual bypass valve
Adjust manual bypass valve until heater outlet water temp is
between 105°F and 120°F (40°C and 49°C)
Check movement by putting in hot water (above 120°F
[49°C] or higher). If no movement, replace
Refer to installation instructions
Follow recommended installation instructions
Clean burners
Calculate heating capacity of heater
Htr. output (BTUH)
= approx. degF rise/hr
Pool gallonage x 8.33
or refer to heater sizing chart
This does not take into account heat loss due to weather
Reset time clock
Clean filter
Refer to installation instructions
Replace heat exchanger and maintain proper water chemistry
See Pressure Switch Adjustment, See page 38.
Replace refractory
Determine cause of sooting and correct
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