Hayward H250FD - Temperature Lock-Out; Fahrenheit Versus Celsius; Winterization; Spring Start-Up

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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.