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TEMPERATURE LOCK-OUT:

Thedigitalthermostatinthispoolheaterallowstheusertolockthemaximumtemperaturesettingallowed.

Thisfeatureisusefulforpreventingunauthorizedusersfrommanuallyadjustingthetemperaturesettingshigher

thandesired.Onanewheater,themaximumallowedtemperaturelocksettingsareinitiallysetatthefactoryto

90°FforPOOLmode,and104°FforSPAmode.Toadjustthesesettings,usethefollowingprocedure:

1. UsetheMODEbuttontoputtheheaterinSTANDBYmode.

2. PressandholdboththeUPandDOWNbuttonsatthesametime.

3. After3seconds,thethermostatentersmaximumtemperaturelockadjustmentmode.

4. TheSPAindicatorlightilluminatesandthenumericdisplayshowsthecurrentSPAmodemaximum

 temperaturelocksetting.BoththeSPAindicatorlightandthenumericdisplayashesrapidlywhenin

 adjustmentmode.

5. UsetheUPandDOWNbuttonstosetthedesiredmaximumtemperaturelocksetting.Whennished,

 presstheMODEbutton.

6. ThePOOLindicatorlightilluminatesandthenumericdisplayshowsthecurrentPOOLmodemaximum

 temperaturelocksetting.BoththePOOLindicatorlightandthenumericdisplayashesrapidlywhenin

 adjustmentmode.

7. UsetheUPandDOWNbuttonstosetthedesiredmaximumtemperaturelock.Whennished,pressthe

 MODEbutton.

8. TheheaterwillreturntoSTANDBYmode.

FAHRENHEIT VERSUS CELSIUS:

ThetemperaturecanbedisplayedinFahrenheitorCelsius.TOchangethedisplay,usethe“MODE”button

toplacetheheaterin“STANDBY”.Thenpressandholdthe“UP”and“MODE”buttonsuntilthedisplayshows

the°F/°Cselection.Pressthe“DOWN”buttontotogglebetweenselections.Toaccepttheselection,pressthe

“MODE”button.Iftheuserdoesnotact,theselectionwillbeautomaticallyacceptedafter60seconds.

WINTERIZATION:

Inmoderateclimates,theheatercancontinuetooperateduringshort-termcoldspells.Donotusethe

heatertomaintainthewatertemperaturejustabovefreezingorforfreezeprotection.Caremustbetakento

avoidfreeze-upintheheater.Whenitisusedduringfreezingweather,thepumpmustruncontinuously.The

heaterisnotwarrantedagainstfreeze-ups.Inregionswherefreezingtemperaturesareencountered,allwater

mustbedrainedfromtheheaterwhenitisoutofservice,topreventdamagetotheheaterandpiping.Drain-

ingtheheatexchangerisrecommendedaspartoftheseason’sshutdownprocedures.

SPRING START-UP – CONSULT A PROFESSIONAL:

1. Inspectandcleantheheater,beingsuretheheaterisfreeofleavesanddebrispriortostartup.

2. Besureinletandoutletpipingareproperlyattachedtotheheaterandthedrainvalveisclosed.

3. Turntheltrationsystempump“ON”andallowthesystemtorunlongenoughtopurgealltheair

fromthelines.

4. Turnthegassupplytotheheater“ON”.

5. Setthetemperaturecontrolusingthekeypadto“POOL”or“SPA”andadjustthesetpointtothe

desiredtemperaturesetting.

6. Ifoperatingdifcultiesareencountered,contactaqualiedservicecompanyforassistance.

Hayward H500FD User Manual

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