Aqua Comfort AC110 User manual

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OWNER’S MANUAL
Models: AC110, AC125, AC150 made from 2003 through 2010
Manufacturing High Quality, High Efficiency
Heat Pump Pool Heaters
TABLE OF CONTENTS
SAFETY CONSIDERATIONS 2
INSPECTION 2
GENERAL INFORMATION 2
INSTALLATION 2
WATER FLOW & CONNECTIONS 2-3
ELECTRICAL CONNECTIONS 4
MODES OF OPERATION 5
WIRING DIAGRAMS 6
ELECTRONIC CONTROL PANEL 7
CHEMICAL USE 8
START-UP 9-1
MAINTENANCE 1 -11
TROUBLESHOOTING CHECKLIST 11-12
CALLING FOR SERVICE 12
WARRANTY 13
WARRANTY REGISTRATION 14
SAFETY CONSIDERATIONS
Proudly Made in the USA
[email protected]
www.aquacomfort.com/service-and-support/
[phone]
ALL IN-GROUND
MODELS
INSTALLATION,
OPERATION,
MAINTENANCE
& SER ICE

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• ualified personnel should perform installation, maintenance and service.
• Make sure all field wiring conforms to the heater specifications and all national and local
codes.
• Disconnect all power sources before performing any maintenance or service to the heater.
INSPECTION
Immediately upon receipt, inspect cartons and their contents for damage due to transit.
Damage, if found, should be noted on delivery papers and a claim filed with the carrier. Also,
check unit data plate to make sure you have the proper model, before installing.
ENERAL INFORMATION
The information in this manual was prepared to assist in the proper installation, operation,
maintenance and service of your new heat pump pool heater. Please read the entire manual
and follow all instructions. Improper installation and use can result in damage to the heater,
unsatisfactory operation, and may void the warranty. Retain this manual for quick reference.
INSTALLATION
When selecting a location consider the following:
• Heater must be located outdoors.
• Minimum of 24” of clearance on access / service side of heater.
• Minimum of 18” of clearance on all three air intake sides of heater.
• Minimum of 48” of clearance for air discharge (top of unit).
• The heater should sit on a solid level surface sufficient above grade to prevent water from
entering it, and allowing condensate to drain from base.
• The length of water piping and electric should be kept to a minimum to avoid capacity loss
and decreased efficiency.
WATER FLOW & CONNECTIONS
Water connections are made at the rear of the heater. Both water in and out are labeled just
above the water connections. LEFT REAR = WATER IN and RIGHT REAR = WATER OUT.
2” unions are supplied and are made to accept 2” rigid PVC pipe. NOTE: unions can be used
for quick drainage of your heater and winterizing.
• Heater must be piped downstream from filter in the pool return line.
• Inline chlorinators must be piped downstream from heater. A check valve must be
installed between the heater and chlorinator to prevent drain back of the chlorine when
the pump is off. A chemical trap may also be piped at least six (6) inches above the
height of the chlorinator.

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• When all the plumbing connections are complete, and ample drying time is allowed, run the
filter pump and check the entire system for water leaks.
• Make sure filter is clean and there are no obstructions in the filtering system.
• Proper water flow is essential to the performance of your heater. The minimum flow rate is 20 GPM.
TYPICAL WATER FLOW CONNECTIONS

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ELECTRICAL CONNECTIONS
Field connections must comply with national and local codes. The work must be done by a qualified
electrician.
Heater must be permanently grounded and bonded.
Bonding will drastically reduce the chances of electrolysis, “Electrical Corrosion.”
Use copper conductors only.
Disconnect all power sources before performing any work on unit.
Standard Power Supply: 208/230 - 60 - 1
See unit data plate for specific ampacity.
Wiring Main Power Supply
1. Remove the screws from lower left and right side of front cover (service panel).
2. Remove the screws on left side of hinged electrical enclosure.
3. Route weather tight flexible conduit through opening at base of unit. Connect conduit to the
bottom of the electrical enclosure using a weather tight fitting. A knockout is provided next to the
main contactor to accept a weather tight fitting. Mounting conduit directly to the electrical
enclosure will ensure a moisture tight seal, extending the life of the heater.
4. Attach grounding conductor to the ground lug provided inside the electrical enclosure (labeled).
5. Install L1 and L2 input conductors to the line side of the main contactor. (See wiring diagrams.)
6. Connect bond wire (at least #8 solid copper wire) from bond lug on right side of coil header
plate to pool pump bonding terminal or other suitable location.

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MODES OF OPERATION
To Change Between Pool and Spa Set Points Automatically:
This change can be done automatically as the water flow is either directed to the pool or spa. The use of an
external water pressure switch in the spa piping IS necessary. A two-wire control circuit must be connected
from the water pressure switch to terminals 18 and 19 on the electronic control board. The red jumper wire
at the top of the control board must then be cut to activate this system.
Remote Thermostats and Controllers:
If a remote thermostat or any other control system is to be used to turn the heater on and off, a normally open
dry contact can be made at terminals 18 and 19 on the bottom right of the electronic control board. The red
jumper at the top of the control board must then be cut to activate this system. In the case of a remote
thermostat where the temperature will be regulated externally, set the Pool Mode to the OFF position and
the Spa Mode to 104°F (40°C). The heater will only run when the remote control calls for heating.
REMOTE SPA PRESSURE
SWITCH OR AUTO
CONTROLLER (N.O. )
2 METHODS CAN BE USED TO SWITCH UNIT BETWEEN POOL AND SPA MODE.
J-1 JUMPER - NOT CUT: Using the se ect key wi activate either mode manua y.
J-1 JUMPER - CUT: A remote switch connected to termina s 18 and 19 wi activate SPA MODE.
RED JUMPER “J1”
ELECTRONIC
CONTROL
BOARD
18 19

6

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ELECTRONIC CONTROL PANEL
MODE SELECTION
Selecting the desired mode of operation is accomplished by pressing the SELECT KEY.
Temperature Setpoint
• Temperature setpoint maximum for POOL mode is 95°F (35°C).
• Temperature setpoint maximum for SPA mode is 104°F (40°C).
To change the temperature setpoint, press the SELECT KEY until you reach either POOL or SPA. This will
prompt the control to display the current temperature setpoint. Hold either the UP or DOWN key
to scroll
your desired temperature setpoint. Once your new temperature setpoint has been reached, release the UP or
DOWN key. Your new setpoint will be displayed for five seconds, then revert back to the actual pool or spa
water temperature.
Selecting Pool or Spa Mode
Press the SELECT KEY until you reach P_S. Pressing the UP or DOWN key will allow you to enter either
POOL or SPA mode. Green LED indicator lights will verify the mode selected.
FIL MODE MUST BE IN THE OFF POSITION OR A FLO3 ERROR CODE WILL BE DISPLAYED.
Selecting temperature in Fahrenheit or Celsius
The factory setting is Fahrenheit. Press the SELECT KEY until you reach F_C. Press the UP KEY to reach
Fahrenheit or the DOWN KEY to reach Celsius.
DI ITAL DISPLAY
Displays the actual pool/spa
temperature. In select mode
displays other parameters.
SELECT/SERVICE KEY
Used to select mode of
operation and enter service
mode.
POOL LED indicates pool mode.
HEAT ON LED indicates heat is on.
SPA LED indicates spa mode.
INCREASE KEY
DECREASE KEY

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CHEMICAL USE
Water quality must be checked regularly and maintained within recommended limits at all times.
Failure to maintain the proper water quality will greatly reduce the life of your heater.
• Never add chemicals directly into skimmer.
• Automatic chlorinators must be piped downstream from the heater. A check valve must be installed
between the chlorinator and heater to prevent raw chlorine from draining back into the heater. A chemical
trap may be piped at least six (6) inches above the chlorinator. See piping diagram B.
Always maintain the following water quality requirements:
PH LE EL 7.4 to 7.8
CHLORINE CONCENTRATION 1 to 5 PPM
TOTAL ALKALINITY 100 to 200 PPM
CALCIUM HARDNESS 100 to 300 PPM

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START-UP
Before proceeding with this section make certain all plumbing connections are airtight and leak free.
Flow rates should not exceed 70 GPM maximum. Use of an external bypass is necessary at 70 GPM
and above. Minimum flow rate is 20 GPM.
• Turn filter pump time clock to the ON position and set filter pump hours. For initial heating, the pool
heater and filter pump may need to run continuously until your desired temperature is reached. After
initial heating is achieved, the heater will run only to maintain your desired temperature.
• Turn power supply to heater ON.
• The control panel will light up and display either OFF or the actual pool water temperature.
• Select POOL or SPA and set your desired water temperature by scrolling either up or down.
• Select P_S and scroll up or down to select POOL or SPA mode.
• If your programmed water temperature is above the actual water temperature, the red HEAT ON LED will
light up indicating HEAT mode. The fan will start, and then the compressor will start.
NOTE: Each time the compressor turns off, it is protected by a 3 minute anti-cycling delay.
Initial Heating
Initial heating may require you to run your heater and filter pump continuously for at least 24 hours,
or more, depending on the following factors:
• Temperature difference between actual water temperature and desired water temperature.
• Size of pool.
• Ambient air temperature, the cooler the air temperature the longer the heating time.
• Heat loss (evaporative, convective, radiative and conductive).
• A pool cover / solar blanket may reduce initial heating time by up to 50 percent.
Reducing Heat Loss - Pool Cover / Solar Blanket
We highly recommend the use of a pool cover / solar blanket. Covering your pool is the single most cost
effective means of reducing heat costs from 50 to 70 percent. Heating a pool without a cover is like heating
a house without a roof. They also reduce the amount of maintenance costs. By reducing evaporation,
covers reduce the quantity of chemicals needed.
Because evaporation accounts for about 70 percent of pool heat loss, the beneficial effect of using a pool cover /
solar blanket can be dramatic.
Wind Speed Reduction
Reducing wind velocity at the water surface reduces convective and evaporative losses. Fences, trees, hills, or
tall hedges close to the pool perimeter are effective windbreaks. Locate these obstructions to take maximum
advantage of their effectiveness as windbreaks, without shading the pool surface from the sun.

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Defrost Cycle
The heat pump pool heater has automatic defrost. When the outdoor temperature drops below 40 °F, frost may
start to form on the evaporator coil. Frost buildup will be heaviest on humid days when the temperature is
between 35-40°. During the defrost cycle, the display will show “FS” to indicate that the unit is defrosting.
During this time the fan is running and the compressor is inactive.
Internal Protection Analyzers
The heater is equipped with internal devices to monitor and protect the integrity of the unit. Should an abnormal
condition occur, these devices will interrupt the operation of the unit and may display the appropriate code on
the control panel.
• LOW WATER FLOW: Indicated by “HP”, “HP3”, or “FLO” on the control panel. The heater is designed to
run efficiently above twenty (20) GPM. If there is insufficient water flow, the unit will shut down, protecting the
compressor. The usual causes for these conditions are a dirty pool water filter, a restriction in the return line (i.e.
skimmer), or improper valve positioning.
• NO WATER FLOW: Indicated by “FLO” on the control panel. When the filter pump is off, or if the water
flow to the heater is interrupted during the heating mode, the internal water pressure switch will shut down the
unit. When normal water flow resumes, the heater will automatically restart itself.
• Other analyzer codes include: “FL3”, “LP3”, “LP”, “dPO”, “PO”, “dPC”, “Pc”, “PLE”, “CSE” and “SPi”.
The TROUBLESHOOTING CHECKLIST on page 11 goes into further detail on these analyzer codes.
MAINTENANCE
WARNING: DISCONNECT ELECTRICAL POWER TO UNIT BEFORE STARTING ANY MAINTENANCE TO
PREVENT SERIOUS INJURY FROM SHOCK.
Protecting your Heater
• Keep your pool filter system clean and free of restrictions to ensure proper water flow.
• Check water chemistry regularly. Misuse of chemicals will cause permanent damage to your heater and
other pool equipment. Manufacturers can void warranties for damage as a result of poor water quality.
• Free airflow is essential. Keep the evaporator coil clean and free of weeds, leaves, glass clippings, dirt
and other debris that will decrease the airflow. Keep fences and shrubs away from air inlets (sides and
back of heater).
• Frequent rinsing of the evaporator with fresh water will remove build up from its surface. Always
spray the coil gently with a regular garden hose being careful not to bend aluminum fins.
• Regular cleaning of the cabinet will improve its appearance and extend the life of the finish.
Winterizing
When the heater is exposed to freezing temperatures, it is essential that all water within the unit be properly
drained. When water freezes, it expands, damaging piping.

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• Turn thermostat settings to OFF. Turn filter pump to OFF.
• Turn power to unit OFF (i.e. pull disconnect or turn circuit breaker OFF).
• Disconnect water inlet and outlet unions at the back of the unit. Be careful not to lose rubber o-rings.
• Flush the heater piping out with fresh water to remove any residual chemicals.
• Use low-pressure air or vacuum to remove water that has accumulated inside the piping of the heater.
TROUBLESHOOTING CHECKLIST
• Check to see that the electrical power is on. Reset breakers, or replace fuses if necessary.
• Check to be sure the electric control panel is set properly. The desired temperature must be set above
the actual pool or spa temperature for the heater to run.
• Check to make sure the evaporator coil has enough clearance and that there are no restrictions to its
airflow.
• Certain ambient air conditions may cause the heater to go into defrost mode, displayed on the
control panel as “FS”.
NOTE: IT IS NORMAL FOR WATER TO DRIP FROM THE DRAINHOLES AT THE BASE OF THE HEATER.
THE UNIT PRODUCES CONDENSATE WHEN IT OPERATES.
Analyzer Codes
FAILURE LOCK-OUT: This feature is for the protection of the heater. If the same failure occurs three (3)
times within an hour, the control will not allow the unit to restart, and shall display the appropriate code (i.e.
“FL3”, “HP3”, or “LP3”). The reset to normal conditions can be accomplished by pressing a button on the
control touch pad.
“FLO” (Little or No Water Flow)
• The pump is not running.
• The filter is dirty or clogged.
• Shortage of water to pump - air leak.
• Undersized pump.
• Valves not in correct position.
• Filter in backwash mode.
• Water pressure switch needs adjustment, or is defective.
“FL3” (See page 6)
“HP” (Compressor High Pressure)
• Low water flow to heater.
• Defective high-pressure switch.

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“LP” (Compressor Low Pressure)
• Evaporator coil dirty.
• Fan motor not running.
• Low refrigerant pressure.
• Defective low-pressure switch.
“dPO” Evaporator temperature sensor connection opened. Check for cut or loose sensor wiring or
defective sensor.
“PO” Water temperature sensor connection opened. Check for cut or loose sensor wiring or defective
sensor.
“dPC” Evaporator temperature sensor connection shorted. Check for a short in sensor wiring or
defective sensor.
“Pc” Water temperature sensor connection shorted. Check for a short in sensor wiring or defective
sensor.
“FS” Heat pump in defrost cycle.
“PLE or CSE” EEPROM memory data loss. Hold down the SELECT key until the error message
disappears. The control will be reinitiated to factory default. Re-enter the setpoints.
“SPi” Defective controller, remove power and restart. If error is still present, replace controller.
CALLING FOR SER ICE
• Please eliminate any water flow problems before calling for service.
• If you are unable to contact the installing agent, please go to www.aquacomfort.com/service-and-support to
contact AQUA COMFORT TECHNOLOGIES,
LLC. A factory representative will assist you or your serviceman over the phone.
SERVICE PERFORMED WITHIN THE WARRANTY PERIOD MUST BE APPROVED BY AQUA COMFORT TECHNOLOGIES,
LLC PRIOR TO SERVICE BEING PERFORMED AND ONLY BY AN AQUA COMFORT TECHNOLOGIES, LLC AUTHORIZED
TECHNICIAN. SEE WARRANTY FOR DETAILS.
Please have the following ready before calling:
IN-GROUND MODEL #:
SERIAL #:
DATE OF INSTALLATION:
NAME OF OWNER:
ADDRESS:
CONTACT #: