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The heater will not heat faster if you turn the thermostat all the way up. The heater will
never run without water running through it from the pool/spa filter pump.  When the
heater is started the fan will run right away.  The compressor will start after a 5 to 7
minute delay. The heating light will come on only when the compressor is running.
The heater will produce condensation at a steady rate. The condensation exits the
heater from the bottom drains.  The more humidity the more condensation. The ther-
mostat is accurate within three degrees and may not always match exactly to the de-
gree numbers printed on the control panel as it is effected by the humidity and other
factors.  The heater is designed to shut off in defrost mode when the air temperature
drop below 45˚F to 50˚F.

Page 11

Warranty Service

Before calling for warranty service you should check the following first:

1.

 Clean all filters and traps in the pool circulation system. Low water flow will cause

the unit to shut down or cycle.

2.

 Check and adjust all water flow valves and adjust to the proper positions to insure

proper water flow through the heater.

3.

 Check the water pump timer setting to insure there is enough time allotted for a

proper heating cycle.

4.

 Check all circuit breakers and disconnects.  Note: More than one disconnect may be

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 devices.  All external controls are disconnected during warranty service
and the heater is diagnosed as manufactured then reconnected.

7.  The limited factory warranty does not cover damage or conditions caused
by but not limited to the following:

Improper installation.
Improper use.
Inadequate run time on the water pump timer.
Improper water flow to the heater.
Conditions caused or associated with 3rd party external controls.
Chemical damage or improper water balance.
Sprinkler damage.
Roof run off damage.
Freeze damage or operation damage during freezing conditions.
Salt and/or sand/debris damage.
Lack of maintenance and/or cleaning.
Unauthorized servicing of the heater during the warranty period.
Normal rusting and oxidation of metal components.
Non warranty service calls such as inspections, maintenance, or problems unrelated to
the heater as it was manufactured are not covered under the warranty.

8.

  You can contact the factory @ 888-297-3826 to be pre-qualified and scheduled

with a factory authorized service center in your area. Have your model number, serial
number and installation date ready.

Important Notes:

Summary of Contents for DIGITAL LOGIC AT400

Page 1: ...NAL 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 DIG...

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...

Page 3: ...id 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 in...

Page 4: ...rt 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...

Page 5: ...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...

Page 6: ...D 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...

Page 7: ...at 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 a...

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 fr...

Page 9: ...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 r...

Page 10: ...up 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 cle...

Page 11: ...equired 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 correc...

Page 12: ...ns 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...

Page 13: ...ut 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 calor...

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