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HEATER ON/OFF:

To start the heater press this button and it’s green light will come on.  To disable the
heater press this button and its green light will go off.

THERMOSTAT BUTTONS:

Pressing the + button will raise the set temperature.  Pressing the - button will lower the
set temperature.  When either button is pressed the LED display will begin to flash.  The
flashing numbers indicate the thermostat setting.

MODE SELECT BUTTONS-POOL or SPA:  

The heater has two thermostat modes for

two different desired temperature settings, one for pool mode and one for spa mode.
If you do not have a spa use the pool mode only. If you do have a spa, you can connect
two Jandy™ motorized plumbing valves.  Therefore, when you select either mode the
motorized valves will turn to isolate the heater to either the pool or spa.  NOTE: There
is a 30 second compressor when switching pool/spa modes.

OPTIONAL” WATER PUMP TIME CLOCK OVERRIDE OPERATION  

When the T.C.O. but-

ton is set to the ON mode, the Time Clock Override feature is designed to start the
water pump whenever the pool requires heat.  Once the pool is up to the set tempera-
ture the heater will stop and then 5 minuets later the water pump will stop. When this
button is set to the OFF mode, the heater will operate only when the water pump is
running during the timed period set on the water pumps time clock.
NOTE: The time clock override works best if used during cooler weather conditions
where the pool is loosing more than 8 to 10 degrees over night or when the pool is
being heated from “dead cold”.
NOTE: If the time clock override starts the water pump and the thermostat does not
continue to call for heat for at least 5 minuets, the control will shut the water pump and
heater off. Thereafter, it will not re-attempt to start the water pump for 4 hours.  This 4
hour delay can be bypassed by pressing the T.C.O. button off then back on.
NOTE:  When the T.C.O. button is activated while in “spa mode” the water pump will
run the entire time you are in sap mode. When you switch back to pool mode there will
be a 5 minute delay before the water pump shuts off.  The T.C.O. option is built into the
heater at the factory and can not be added later.

Page 4

“Digital Logic” Digital Control Panel Information

Summary of Contents for DIGITAL LOGIC AT800

Page 1: ...ONAL POOL SPA INSTITUTE V2 3 AT 2001 CalorexU S A LLC SWIMMING POOL SPA HEAT PUMPS NOTE Installers should see separate installation manual Model AT800 AT600 AT400 BLACK CABINET with DIGITAL CONTROL DIGITAL CONTROL DIGITAL CONTROL DIGITAL CONTROL DIGITAL CONTROLS S S S S ONLY ONLY ONLY ONLY ONLY DIGITAL LOGIC DIGITAL LOGIC DIGITAL LOGIC DIGITAL LOGIC DIGITAL LOGIC ...

Page 2: ... one of the most efficient ways to heat your pool or spa Your heat pump was manufactured by Calorex USA the very first company to produce swimming pool heat pumps Since making the very first pool heat pump some 24 years ago Calorex has become the industry leader in reliability and efficiency You can expect to get more use from your pool or spa investment with your new heat pump The heat pump will ...

Page 3: ...uid refrigerant in the air coil absorbs the available heat in the ambient air transforming it into a gas The refrigerant gas is then pumped into the compressor When this warmed gas is com pressed it intensifies or concen trates the heat like a magnifying glass in the sun This intensely hot gas is then pumped into the heat ex changer condenser where the actual heat transfer takes place As the pool ...

Page 4: ...art the water pump whenever the pool requires heat Once the pool is up to the set tempera ture the heater will stop and then 5 minuets later the water pump will stop When this button is set to the OFF mode the heater will operate only when the water pump is running during the timed period set on the water pumps time clock NOTE The time clock override works best if used during cooler weather condit...

Page 5: ...T MODE F DEFROST MODE F DEFROST MODE F DEFROST MODE F DEFROST MODE This readout indicates that the internal defrost safety control has disabled the heater During cold weather where the air temperature drops below approximately 45 to 50 degrees depending on humidity the low refrigerant pressure switch or defrost con trol is designed to disable the compressor only Once the unit is in defrost mode th...

Page 6: ...ED display will show a constant readout of the actual cur rent water temperature To set the desired water temperature press either the or thermostat buttons While adjusting the set temperature the LED will flash The flashing numbers will indicate the thermostat setting If you have a spa you can press the spa mode button and set the desired spa tempera ture If you do not have a spa use the pool mod...

Page 7: ...eat loss by as much as 80 and reduce heating costs as much as 50 Using a cover during the initial heat up period will greatly reduce the operational time needed 8 SPA HEATING When heating a spa it is advisable to not run the air blower or air inlet venturis during the initial heat up time Air blowers and venturis inject air into the water to create the spa therapy action During colder weather the ...

Page 8: ... is not restricted Make sure the unit can breathe well The cooler discharge air from the top should not accumulate and be drawn into the side air intake coils Keep all plants and shrubs trimmed away from the heater Make sure the front is accessible for future service 3 Do not allow lawn sprinklers to spray on the heater in any way Keep sprinkler heads away from the heat pump to prevent corrosion a...

Page 9: ...S IN THE POOL or SPA SKIMMER Chemicals placed in the skimmer will feed concentrated chemical or chlorine into the heat exchanger before it is diluted with the rest of the pool water Chemicals or chlo rine placed in the skimmer will dissolve and concentrate in the skimmer when the water pump is off and then send a super concentrated chemical solution through the heater every time the water pump res...

Page 10: ...dup A minimal air coil cleaning should be done as needed and at least two times per year If the heater is installed in a sandy or salty condition the air coil should be cleaned more frequently 3 To clean the air coil SHUT OFF ALL POWER then use a garden hose at low pressure without a pressure nozzle to lightly rinse the air coil in an up and down motion You can use a mild soap while rinsing to hel...

Page 11: ...required to shut off or turn on power to the heater 5 Confirm that all heater controls thermostat thermostat selector switch reset tripper and optional auto heat switch if so equipped are in the correct position 6 If any 3rd party control devices are installed on the pool spa system make sure they are functioning properly Factory service technicians will not diagnose 3rd party exter nal control de...

Page 12: ...uns T Stat Relay Does Not Close Heater Does Not Activate After Delay Period Try Again or Possible Bad Time Delay Possible Bad T Stat Board Pot or Sensor 1 Hour Time Delay Activates Water Temperature is Below Setting Water Temperature is Above Setting Compressor Starts Green Heating Light ON Time Delay Passes or Air Temp Increases Safety Control Resets Compressor Restarts or Below 45 to 50 F Air Te...

Page 13: ...out notice 2000 Calorex U S A LLC MEMBER NATIONAL POOL SPA INSTITUTE Pool Heat Pump Manufacturers Association MEMBER 5826 Corporation Circle Ft Myers Florida 33905 888 297 3826 www calorexusa com calorexusa earthlink net U S A L L C ...

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