aquatherm AT075 User manual

Installation Manual
Dial Display
LTM1061 REV A- (project rel 8.00)
Important
Read this document before operating / installing this product
For additional product manuals and operation / installation procedures, please visit
http://www.aquathermheatpumps.com/

Table of Contents
Contacts 1
Safety 1
1 - Installation 3
1.1 Positioning Equipment 3
1.2 Plumbing 4
1.2.a Plumbing Requirements 4
1.2.b Maintaining Ability to Winterize 4
1.2.c Water Connections to Heat Pump 5
1.2.d In-Line Chlorine Feeders 5
1.2.e Water Flow Rates 6
1.3 Electrical 7
1.3.a Electrical Requirements 7
1.3.b Incoming Power Access Holes 8
1.3.c Access Panels 9
1.3.d Verifying Transformer Setting (Select Units) 9
1.3.e Schematic Location 10
1.4 Connecting an External Controller (Optional) 10
1.4.a PoolSync® 10
1.4.b WS2 (2-WIRE) Controllers (Pool-Spa) 11
2 - Appendix 12
2.1 Adjusting Water Flow Using ΔT (Delta-T) 12
2.2 Adjusting Water Pressure Switch (Select Units) 13
2.3 Clearances 14
2.4 Dimensions 15
2.5 Identifying Model Specifications 16
2.6 Three-Phase Adjustment 17
2.7 Weights 17
2.8 Plumbing Diagrams 18
2.9 Initial Heating Recommendations 20
2.10 Winterizing 21
3 - Troubleshooting 22
3.1 Fault Codes 23
3.2 Issues and Resolutions 25
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Contacts
For further assistance, please contact the installing dealer of this product.
To better assist you, please have the heat pump model and serial number available.
Product Information:
Website http://www.aquathermheatpumps.com/
Phone [phone]
Hours 8 am - 4 pm M-F Eastern
Service Information:
Website http://www.aquathermheatpumps.com/request-service.html
Phone [phone]
Hours 8-4 pm, Eastern M-F
SAFETY
lFor personal safety, and to avoid damage to equipment, follow all safety instructions displayed on the
equipment and within this manual. Repair and service of heat pump must be performed by an authorized service
center.
lWarranties may be voided if the equipment has been improperly installed, maintained or serviced.
lIf service is deemed necessary, please contact Aquatherm.
SAFETY SIGNALS
Throughout this document, safety signals have been placed where particular attention is
required.
DANGER Failure to heed the following will result in injury or death.
WARNING Failure to heed the following may result in injury or death.
NOTICE
Failure to heed the following may result in damage to
equipment.
When installing and using your heat pump basic safety precautions must always be followed, including the
following:
DANGER Failure to heed the following will result in injury or death.
lThe heat pump utilizes high voltage and rotating equipment. Use caution when servicing.
lFollow all National Electric Codes (NEC) and/or State and Local guidelines.

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WARNING Failure to heed the following may result in injury or death.
lInstallation and repairs must be performed by a qualified technician.
lThe heat pump contains refrigerant under pressure. Repairs to the refrigerant circuit must not be attempted by
untrained and/or unqualified individuals. Service must be performed only by qualified HVAC technicians.
Recover refrigerant before opening the system.
lImproper water chemistry can present a serious health hazard. To avoid possible hazards, maintain pool/spa water
per standards as detailed in the product's operation manual.
lProlonged immersion in water warmer than normal body temperature may cause a condition known as
Hyperthermia. The symptoms of Hyperthermia include unawareness of impending hazard, failure to perceive
heat, failure to recognize the need to exit the pool or spa, and unconsciousness. The use of alcohol, drugs, or
medication can greatly increase the risk of fatal Hyperthermia. People having an adverse medical history, or
pregnant women should consult a physician before using a hot tub or spa. Children and the elderly should be
supervised by a responsible adult.
lThis appliance is not to be used by persons (including children) with reduced physical, sensory, or mental
capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction.
lChildren must be supervised and are not to play with the appliance.
NOTICE
Failure to heed the following may result in damage to equipment.
lMaintain proper water chemistry to avoid damage to the pump, filter, pool shell, etc.
lWater flow exceeding the maximum flow rate requires a bypass. Damage due to excessive water flow will void
the warranty.
lFailure to protect equipment against corrosive conditions will adversely affect the life of the equipment and will
void equipment warranty.
SAVE THESE INSTRUCTIONS

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1 - Installation
DANGER Failure to heed the following will result in injury or death.
lDeactivate power while routing wiring to control board.
lFollow all National Electric Codes (NEC) and/or State and Local guidelines.
WARNING Failure to heed the following may result in injury or death.
lInstallation of this equipment by anyone other than a qualified installer can result in a safety hazard.
lThe information contained throughout the "Installation" section is intended for use by qualified installation
technicians familiar with the swimming Pool/Spa safety standards.
NOTICE
Failure to heed the following may result in damage to equipment.
lFailure to protect equipment against corrosive conditions will adversely affect the life of the equipment and will
void equipment warranty.
lDo not install equipment inside of a building.
IN THIS SECTION:
1.1 Positioning Equipment 3
1.2 Plumbing 4
1.3 Electrical 7
1.4 Connecting an External Controller (Optional) 10
1.1 Positioning Equipment
NOTICE
Failure to heed the following may result in damage to equipment.
lDo not install equipment inside of a building.
Outdoor Use Only
Do not install equipment inside of a room or building.
lHeat Pumps require unobstructed airflow for proper operation. Heat Pumps should never be installed indoors or
in a location where airflow is restricted.
lIf an indoor installation is being considered, the installer and dealer are strongly urged to contact the Aquatherm
Application Department, or a local Professional Engineer prior to proceeding.
lSee "Clearances" on page14.
Controlling Irrigation and Rainwater Runoff
lIrrigation water may damage heat pump components. Direct irrigation water away from the heat pump.
lThe heat pump will withstand normal rainfall. Do not allow a roof slope to direct rainwater onto the heat pump.
Have a gutter installed on the roof edge to direct this water away from the heat pump. Or install the heat pump
in another location.
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Planning for Condensation
The heat pump can produce a large amount of condensation. The amount of water depends on air
temperature and humidity.
lInstall the heat pump with enough height to allow for water drainage.
lPlan for water drainage as needed.
Mounting Pad Requirements
lThe heat pump's base must be installed on a flat and level surface that completely supports the entire base.
lBuild the heat pump pad out of concrete or other code-approved material.
lConfirm the pad can support the weight of the heat pump.
lElevate the pad enough to allow for drainage.
lMake sure the pad is flat and level.
lHave the pad support the entire heat pump base in all directions.
lDo not install the heat pump on soil or grass.
lDo not allow the heat pump base to touch the building's foundation.
lDo not place the heat pump directly on a concrete floor. This can cause noise to be transmitted to an occupied
space. If necessary install vibration dampers between the heat pump base and floor.
lEquipment pad must meet all requirements of authorities having code-related jurisdiction.
Anchoring to Pad
lFollow all applicable local, state, and national requirements regarding wind load anchoring.
lThe shipping brackets used to secure the heat pump to the pallet are approved mounting (hurricane) brackets.
They should be used to anchor the heat pump to the pad.
lIf needed, contact Aquatherm to obtain anchoring kit information. Please have the heat pump model number and
serial number when requesting support.
1.2 Plumbing
1.2.a Plumbing Requirements
lThe heat pump must receive water flow under worst-case conditions such as a fouled water filter.
lFailure to provide clean filtered water to the heat pump can void the product warranty.
lWater flow exceeding maximum flow rates will negatively affect the total pool filtration performance and may
damage the heat pump. This will not be covered under the equipment warranty. See "Water Flow Rates" on
page6.
lInstall a bypass valve whenever water-flow may exceed the maximum rating.
lFor additional guidance testing water flow rates, please contact Aquatherm.
lA safety-enhancing "Over Temperature Alarm"kit is strongly recommended for all spa applications.
lFollow the basic plumbing diagrams as provided in the appendix of this manual. See "Appendix" on page12.
1.2.b Maintaining Ability to Winterize
Do not use glue on the threaded portion of the equipment’s unions. A glued-in-place union will prevent the
equipment from being properly winterized.
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1.2.c Water Connections to Heat Pump
lHeat Pump union sizes are specified on diagrams.
lConnections to site plumbing are made via PVC solvent cement to the female slip socket of the plumbing
unions.
NOTICE
Failure to heed the following may result in damage to equipment.
lDo not use glue on the threaded portion of the equipment’s unions. A glued-in-place union will prevent the
equipment from being properly winterized.
(Aquatherm AT075)
(Aquatherm AT115, AT130 and AT150)
1.2.d In-Line Chlorine Feeders
Place in-line chlorinators downstream from the heat pump and as low in elevation as possible.
lIf an erosion type feeder is used, it is recommended that a Hartford Loop be installed to protect internal heat
pump components.
lA Hartford Loop is not required when using a Salt Chlorine Generator.
lAvoid storing corrosive chemicals near the heat pump to minimize potential damage to the exterior of the heat
pump.
Heat Pump with Erosion Tablet Feeder and Hartford Loop
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1.2.e Water Flow Rates
Maintain water flow rates as indicated. Please note, these specifications relate to the heat pump only. Code-
specified whole system turnover rates must be satisfied.
NOTICE
Failure to heed the following may result in damage to equipment.
lWater flow exceeding maximum flow rates will negatively affect the total pool filtration performance and may
damage the heat pump. This will not be covered under the equipment warranty.
MODEL FLOW RATES
MINIMUM MAXIMUM
AT075 20 GPM (75.7 L/min) 45 GPM (170 L/min)
AT115 30 GPM (113.6 L/min) 70 GPM (265 L/min)
AT130 30 GPM (113.6 L/min) 70 GPM (265 L/min)
AT150 30 GPM (113.6 L/min) 70 GPM (265 L/min)
PLEASE NOTE -
If minimum flow rates are not met, heat pump performance is reduced and performance
will suffer. Internal safety devices may deactivate the heat pump with the following
errors:
lOperate water filtration devices per manufacturer's specifications. Dirty filters can cause a reduction of water
flow to the heat pump. An increase of 7-10 psi (48 to 69 kPa) higher than the clean filter pressure typically
reduces flow rates. This requires the filter to be cleaned or back-washed.
lKeep baskets free of debris. A large quantity of debris in the pump and skimmer baskets can reduce water flow.
lCheck for improper valve settings. A partially closed valve after the filter, or a full-open bypass around the heat
pump, will cause insufficient water flow through the heat pump.
lThe maximum static pressure (or operating pressure) is 50 psi (345 kPa). These specifications relate to the heat
pump only.
lCode-specified whole system turnover rates must be satisfied.
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1.3 Electrical
1.3.a Electrical Requirements
DANGER Failure to heed the following will result in injury or death.
lDeactivate power while routing wiring to control board.
lFollow all National Electric Codes (NEC) and/or State and Local guidelines.
WARNING Failure to heed the following may result in injury or death.
lThe information contained in this section is intended for use by qualified electricians familiar with electrical
service-industry safety standards and methods.
lLocate the equipment disconnect as near to the heat pump as possible. Always satisfy applicable codes and
standards.
lNever mount power-disconnects directly to the heat pump.
lIn sizing power wiring, be especially aware of up-sizing requirements necessary due to wiring distances. Always
satisfy applicable codes and standards.
lAquatherm heat pumps are designed to use copper conductors, only. Do not use aluminum wire.
Standards
Standards Title
NFPA 70, Nat'l Elec.
Code 2017
The electrical installation must conform to the current
version of the National Electric Code (NEC), and all
applicable local and state codes
IEC 60335-1 Household and similar electrical appliances - Safety -
General Requirements
IEC 60335-2 Household and similar electrical appliances - Safety –
Particular requirements for electrical heat pumps, air-
conditioners, and dehumidifiers
UL 1995 & CSA C22.2
No. 236-15 Standard for Safety - Heating and cooling equipment
Table 1 - Standards
Grounding and Bonding
Follow local code requirements for proper grounding and bonding of heat pump equipment.
lA bonding lug has been provided on the heat pump.
Surge Suppression
The use of approved commercial surge protectors is strongly recommended.
Sizing the Electrical Service
Refer to equipment data plate for specific information required to size electrical service and over-current
protection of the heat pump. Sizing is based on data plate information, wire size, wiring devices, and over-
current protection per applicable local codes and standards.
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Minimum and Maximum Operating Voltage
The heat pump must operate within specified voltages.
NOTICE
Failure to heed the following may result in damage to equipment.
lOperating equipment under higher or lower voltage conditions may result in damage to your compressor, motors
or other electrical components. This damage will not be covered by the product warranty.
1. Measure site voltage. The site voltage MUST be measured under “FULL LOAD” conditions. Activate all
equipment using the same electrical panel as the heat pump.
2. If measured site voltage is outside listed ranges, immediately deactivate equipment until site conditions have
been corrected. If unsure of heat pump equipment rating, please
Equipment Rating Minimum
Site Voltage
Maximum
Site Voltage
A Voltage
(208 to 230 Volts)
Single Phase 60 hertz
200 Volts 253 Volts
B Voltage
(208 to 230 Volts)
Three Phase 60 hertz
200 Volts 253 Volts
1.3.b Incoming Power Access Holes
Aquatherm AT075 Aquatherm AT115,
AT130, AT150
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1.3.c Access Panels
DANGER Failure to heed the following will result in injury or death.
lDeactivate power while routing wiring to control board.
lFollow all National Electric Codes (NEC) and/or State and Local guidelines.
(Aquatherm AT075) (Aquatherm AT115, AT130 and AT150)
1.3.d Verifying Transformer Setting (Select Units)
Transformer voltage must be confirmed and set correctly depending on the measured voltage found on the
site. Incorrect settings may cause heat pump damage. The following procedure will allow the installer to
set the heat pump's transformer for the appropriate site voltage.
DANGER Failure to heed the following will result in injury or death.
lDeactivate power while routing wiring to control board.
lFollow all National Electric Codes (NEC) and/or State and Local guidelines.
WARNING Failure to heed the following may result in injury or death.
lThe information contained in this section is intended for use by qualified technicians, familiar with electrical
service-industry safety standards and methods.
Example of heat pump
transformer
(Varies between models)
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Page - 10
1. Turn heat pump on by adjusting the thermostat to call for heating. If more than one heat pump is on-site, turn
them all on. Allow time for all heat pump compressors to activate.
2. Measure the running site voltage.
3. Confirm transformer tap is set for the measured site voltage. If more than one voltage tap is shown, select the
voltage nearest to the running site voltage.
PLEASE NOTE -
lIf more than one voltage is shown on the equipment’s data plate, the factory default setting
is usually the higher voltage on the transformer.
lAs an example, a "208/230" voltage will be set to "240" from the factory.
1.3.e Schematic Location
Schematics are located on the inside of the electrical panel.
1.4 Connecting an External Controller (Optional)
To support a direct connection to an external controller, Aquatherm heat pumps are equipped with
removable terminal blocks on the control board. The control board is located on the low-voltage side of the
electrical enclosure.
IN THIS SECTION:
1.4.a PoolSync® 10
1.4.b WS2 (2-WIRE) Controllers (Pool-Spa) 11
1.4.a PoolSync®
Select heat pumps will automatically allow for WI-FI
capabilities using a PoolSync®.
lThe PoolSync®device will allow direct control of the
heat pump from a mobile device.
lContact installing dealer to order this product.
lGo online and download the PoolSync®manual for
information on connecting and using this device with an
Aquatherm heat pump.
https://www.aquacal.com/owners-manuals/
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Page - 11
1.4.b WS2 (2-WIRE) Controllers (Pool-Spa)
NOTICE
Failure to heed the following may result in damage to equipment.
lConfirm equipment connected to heat pump before selecting this option . All existing configurations will be
cleared.
Figure 1
1. Deactivate power to heat pump.
2. Remove heat pump electrical access panel.
3. Route 22-gauge (minimum), 2-conductor,
low-voltage wires from the controller to the
low voltage side of the heat pump's
electrical enclosure. Follow all National
Electric Codes (NEC) unless State or Local
guidelines supersede.
4. Connect the controller wires to the control
board port labeled "Ext Controller" with the
terminals labeled "Y" and "Z" as follows.
See Figure 1.
lConnect one wire to “Y”.
lConnect other wire to “Z”.
lThe polarity of the wire is not important.
5. Connect the WS2 Enable Jumper.
6. Reattach heat pump access panel.
7. Apply power to heat pump.
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2 - Appendix
IN THIS SECTION:
2.1 Adjusting Water Flow Using ΔT (Delta-T) 12
2.2 Adjusting Water Pressure Switch (Select Units) 13
2.3 Clearances 14
2.4 Dimensions 15
2.5 Identifying Model Specifications 16
2.6 Three-Phase Adjustment 17
2.7 Weights 17
2.8 Plumbing Diagrams 18
2.9 Initial Heating Recommendations 20
2.10 Winterizing 21
2.1 Adjusting Water Flow Using ΔT (Delta-T)
The Delta-T is the temperature difference between the water temperatures entering and leaving the heat
pump.
The equipment can be fine-tuned for maximum performance by balancing water flow rates to maintain an
ideal ∆T.
The adjustment procedure must be completed with the unit in heating mode
1. Adjust the thermostat to its lowest setting with the unit in heating mode.
2. Deactivate the water filtration pump.
3. Confirm that the filters leading to the heat pump are clean.
4. Adjust the valves controlling water headed towards the heat pump to the half-open position.
5. Adjust the valves controlling water leading away from the heat pump to a fully open position.
6. Activate the pool water filtration pump.
7. Slowly raise the thermostat temperature until the heat pump activates.
lAfter a four-minute delay, the heat pump's compressor will start.
8. With the heat pump running, confirm the filtration pump is operating properly with adequate flow and no short
cycling.
9. Wait for water temperatures to stabilize (approximately 5 minutes).
10. Adjust valves in the following order using the temperature chart provided.
a. Adjust the valve that controls water exiting the heat pump until the correct temperature differential is achieved.
Match the temperature measured with a temperature probe to the chart.
b. Wait for water temperatures to stabilize. Then check the temperature again. Re-adjust the valve as needed.
11. Mark valves at these positions for future reference.
HEAT EXCHANGER
TYPE MODEL TEMPERATURE
Tube-in-Tube AT075 2° to 5° F
(1.1° C to 2.8° C)
Tube-in-Tube AT115 3° to 6° F
(1.7° C to 3.3° C)
2 - Appendix

Page - 13
HEAT EXCHANGER
TYPE MODEL TEMPERATURE
Tube-in-Tube AT130 3° to 7° F
(1.7° C to 3.9° C)
Tube-in-Tube AT150 3° to 7° F
(1.7° C to 3.9° C)
Table 2 - Temperature Chart
PLEASE NOTE -
lTemperature differences are based on pool water temperatures of 69° to 75° F. (20.5° to
23.8° C)
lFor water temperatures outside this range, contact Aquatherm. See "Contacts" on page1.
2.2 Adjusting Water Pressure Switch (Select Units)
Adjust the water pressure switch when heat pump attempts to operate without water flow.
Before attempting any adjustments confirm the following :
lThe filter is clean.
lFilter pump is operating.
lThe valves are set to direct the appropriate amount of water through the
heat pump. See "Water Flow Rates" on page6.
DANGER Failure to heed the following will result in injury or death.
lDeactivate power while routing wiring to control board.
lFollow all National Electric Codes (NEC) and/or State and Local guidelines.
WARNING Failure to heed the following may result in injury or death.
lWater Pressure Switch adjustment procedure to be performed by experienced service personnel only; procedure
must not be attempted by individuals lacking adequate electrical and mechanical experience.
NOTICE
Failure to heed the following may result in damage to equipment.
lIf the heat pump continues to operate after a water pressure switch adjustment, deactivate equipment and
perform additional troubleshooting.
1. Remove heat pump access panel.
2. Locate the water pressure switch. It will be outside and
along the bottom edge of the electrical enclosure. The exact
location varies by model.
3. Activate the filter pump.
4. Apply power to heat pump.
5. Slowly rotate the adjustment wheel on the switch. Keep
turning the wheel until the heat pump indicates it is
receiving water.
2 - Appendix

Page - 14
6. Deactivate filter pump. If correctly adjusted, theheat pump will deactivate and the display will show "".
7. Re-install heat pump access panel.
8. If the heat pump continues to operate without water flow, the installation of a grid flow switch may be required.
lThis can become necessary if the heat pump is installed below the elevation of the body of water to be heated. The
standing pressure from the water can cause the water pressure switch to activate when the circulation pump is off.
Therefore a water flow switch must be used in place of a water pressure switch to determine if incoming water is
being sent to the heat pump.
9. If the heat pump continues to operate without water flow, contact Aquatherm.
2.3 Clearances
lProper air circulation is required for the heat pump to operate efficiently. The following diagrams show the
minimum clearances required for the proper operation of the heat pump.
lAvoid placing objects near or on top of the heat pump. This includes shrubbery and lawn furniture. These
objects will reduce performance and efficiency and hinder maintenance access.
(Overhead Clearance) (Top View)
2 - Appendix

Page - 15
2.4 Dimensions
(Aquatherm AT075)
(Aquatherm AT115)
2 - Appendix

Page - 16
(Aquatherm AT130, AT150)
2.5 Identifying Model Specifications
1. Find Data Plate - The data plate is usually posted on the
side of the equipment or the inside of the heat pump's
access plate.
2. Find the model number on the data plate. The first letters
and numbers indicate the model type.
3. The complete model number identifies the equipment's
specifications.
Data Plate Example
2 - Appendix

Page - 17
2.6 Three-Phase Adjustment
DANGER Failure to heed the following will result in injury or death.
lDeactivate power while routing wiring to control board.
lFollow all National Electric Codes (NEC) and/or State and Local guidelines.
WARNING Failure to heed the following may result in injury or death.
lThe information contained in this section is intended for use by qualified technicians, familiar with electrical
service-industry safety standards and methods.
If a three-phase unit fails to operate at start-up, the orientation of the line voltage "field" wiring may need
to be adjusted.
lThe phase monitor is located inside the electrical panel.
Three-Phase
Monitor
1. Deactivate power to the unit. Confirm that power is off to all three legs using an electrical
test meter set for the correct voltage.
2. Switch position of the incoming power wires at each leg as follows, re-connect power and
attempt to restart the unit. If the unit fails to start, disconnect power. Verify off and proceed
to the next leg.
lSwitch incoming power wires at L1 and L2 on the line side to the contactor.
lSwitch incoming power wires at L1 and L3 on the line side to the contactor.
lSwitch incoming power wires at L2 and L3 on the line side to the contactor.
3. When heat pump starts, disconnect power and verify off. Then confirm all line voltage
connections are securely tightened. Reconnect power.
lIf the heat pump does not start, contact Aquatherm for further assistance. See "Contacts" on page1.
2.7 Weights
NOTE:
Specifications subject to change.
Model Type Model Number Install Weight
Aquatherm AT075 200 Pounds
(90.7 kg)
Aquatherm AT115 245 Pounds
(111 kg)
Aquatherm AT130 262 Pounds
(118.9 kg)
Aquatherm AT150 290 Pounds
(131.5 kg)
2 - Appendix