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Unit Description

AIR DISCHARGE FAN

WARNING: ROTATING BLADE KEEP

HANDS & HAIR CLEAR!

THERMOSTAT

CONTROLS

POOL/SPA

LED READOUT

WATER OUT

PIPE

REFRIGERANT

SERVICE VALVES

DO NOT OPEN !

WATER IN

PIPE

SERIAL

NUMBER

PLATE

“OPTIONAL”

TIME CLOCK

OVERRIDE

SWITCH

ELECTRICAL

SUPPLY WIRING

ACCESS PANEL

“KEEP OUT”

ELECTRICAL

INSTALLATION

PORTS

POOL/SPA

SELECT SWITCH

DANGER FROM ELECTRICAL

SHOCK & ROTATING FAN !

SHUT OFF ALL POWER

BEFORE SERVICING !

CAUTION: MORE THAN ONE

DISCONNECTION MAY BE

REQUIRED TO ELIMINATE ALL

POWER TO THIS UNIT INCLUDING

POWER TO THE OPTIONAL TIME

CLOCK OVERRIDE !

WARNING

A swimming pool & spa pump utilizes proven refrigerant technology to capture the heat in the
outside air and transfers it to the pool water.  Refrigerant is used because of its ability to absorb and
transfer heat energy.  The 

fan

 circulates air through the outer 

evaporator air coil

 that acts as a heat

collector. The liquid 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 water passes
through the heat exchanger, the
hot gas gives up its heat to the cooler pool wa-
ter.   The refrigerant returns to a liquid state and
is pumped through the 

expansion valve

 then

into the evaporator air coil to start the process all
over again.

How Does A Heat Pump Warm My Pool ?

How Efficient Is It ?

This graph is a operational cost comparison for equal
amounts of pool heat.  As you can see heat pump is
the most efficient way to heat your pool.

Compared to L.P. gas heaters, a heat pump produces
5 to 6 times more heat for every $1.00 you spend
on operation.

FAN

WARM

AIR

COOL

AIR

COMPRESSOR

POOL

WATER

PUMP

FILTER

HEAT EXCHANGER

CONDENSER

EXPANSION

VALVE

EVAPORATOR

AIR COIL

WARMED

GAS

OFF/ON

SWITCH

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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