Aquacal H/AT120R Water Flow Pressure Switch Adjustment, Water Switch Adjustment Procedure

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Water Flow (Pressure) Switch Adjustment

Occasionally, plumbing system design features will create a situation whereas the heater will abnormally cycle on the water flow circuit. This situation will be evident if the circulator pump is operating, the filter is clean, and all water valves are set to flow water through the heater– but the control panel FLOW light is not illuminated (or lights only intermittently). In these rare instances where the factory water pressure switch setting will not satisfy site conditions, a switch adjustment is possible to enable normal heater operation.

Failure to heed the following may result in permanent injury or

WARNING ! death.

Adjustment procedure to be performed by experienced service personnel only; procedure is NOT a homeowner-based task, and must not be attempted by individuals lacking adequate electrical and mechanical experience. BEWARE: ROTATING FAN PROPHAZARD: fan may start during water switch adjustment. Keep hands clear of fan blade at all times.

Water Switch Adjustment Procedure:

1.Before proceeding with switch adjustment, be absolutely certain the heater is receiving correct water flow. Leave circulation pump operating during water pressure switch (WPS) adjustment process.

2.Remove heater front cover, and locate the water pressure switch. The switch is attached outside of the electrical enclosure, at lower left corner (see photo P-1, located on page following).

3.Heat Wave andAeroTemp heat pumps may come equipped with either of two (2) water pressure switches: “Len Gordon” or “TecMark” brand (see photos P-2 and P-3 to determine which brand pressure switch is installed). The adjustment procedures differ slightly between the two brands.

To Adjust a “Len Gordon” Switch:

1.Facing the switch, you will notice a black, rectangular plastic tab, located on the forward-facing side of the switch (reference P-2). The black rectangle is a wheel lock tab; slide the tab fully left to unlock the adjustment wheel.

2.With water pump operating, and electrical power supplied to the heater, slowly rotate the top of the adjustment wheel TOWARDS you until the flow light (just) illuminates (the heater may start simultaneously, depending on the state of the control circuit time delay).

3.Slide the wheel locking tab fully back to the right-hand, locked position.

To Adjust a “TecMark” Switch:

1.(Reference photo P-3.) TecMark switches do not have an adjustment wheel lock.

2.With water pump operating, and electrical power supplied to the heater, slowly rotate the top of the adjustment wheelAWAYfrom you, until the flow light (just) illuminates (the heater may start simultaneously, depending on the state of the control circuit time delay).

To Complete theAdjustment Procedure– Either Brand Switch:

1.With electrical power remaining ON to the heater, shut off the power to the circulating pump. If the switch has been correctly adjusted, when the water pump stops, the flow light will go dim and, if the heater was operating (operation dependant on the state of control circuit time delay), the heater should shut off. CAUTION: If flow light remains illuminated and/or the heater continues to operate with water pump off, readjust water pressure switch to ensure heater will not run without water flow.

2.Reinstall heater front cover.

Should adjustment of the water pressure switch prove unsuccessful, contact AquaCal technical

support (800-786-7751); site-specific factors may require the installation of an external flow switch. 33

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Contents Pool and Spa Heat Pump Installation Guide Page Table of Contents Table of Contents Eam Icebreaker Heat Pump Water Temperature Safety Safety InformationHeater not Repairable by Owner Water Chemistry SafetySwitching Controls from Pool to Spa Setting the Temperature Controls Pool or SpaHEATING-QUICK Start & Stop Start UpPhysical Characteristics Specifications Data Plate Nomenclature Specifications H/AT100R & 120R ModelsPlacement of Heater InstallationIndoor Installation Outdoor InstallationEquipment Pad Requirements Irrigation, Rainwater Runoff, and Landscape FeaturesAnchoring Heater to Pad OverviewPlumbing Schematics-Flow 70-GPM and Below Plumbing Schematic-Flow Exceeding 70-GPMWater in & OUT Connections Electrical Requirements Connecting External ControllersGeneral Requirements Code-Specific RequirementsGetting Familiar with Controls START-UP & OperationInitial Start-Up and Basic Operation Overview of ControlsReturn Pump Timer Controls to Normal Settings Heating in Cooler Weather Defrost Cycle Heating TipsPool/Spa Blankets Pool and Spa Combination HeatingCalculating Initial Heating Time Maintenance Planned Maintenance Program20-Point Planned Maintenance Service Includes the Following General Maintenance Maintaining Proper Water Flow Seasonal USE & Shut DownMaintaining Proper Clearances Around Heater During the Swim SeasonWinterizing a Heat Pump Equipped with an Internal Drain Winterizing Hard Freeze ConditionsInternal Winterizing Drain Winterizing a Heat Pump Equipped with an External DrainExternal Winterizing Drain Common Troubleshooting Issues TroubleshootingHeat Pump Not Running Heat Pump Running but Not HeatingHeater Fails to Operate Troubleshooting Flow ChartsIcebreaker Analog Controls 1/20/04 Heater Running but Not HeatingStart Determining Water Leaks vs. CondensationSee Danger statement Heater Short CyclingWater Switch Adjustment Procedure Water Flow Pressure Switch AdjustmentTo Adjust a Len Gordon Switch To Adjust a TecMark SwitchWater Pressure Switch Adjustment Overview Defrost System Description and TroubleshootingMajor Components Sequence of OperationTroubleshooting Defrost System Possible Abnormal Conditions & Related Symptoms Troubleshooting Refrigerant Circuit ProblemsUnit Overcharged Unit UnderchargedRefrigerant Circuit Performance Charts Troubleshooting Refrigerant Circuit ProblemsUse of Charts- Information for the Technician Refrigerant Circuit Performance Charts a & B Voltage Models Refrigerant Circuit Performance ChartsRefrigerant Circuit Performance Charts D & H Voltage Models AT100-120XR Replacement PartsContacting the Factory What We Need to Know When You Call UsPage 2737 24th St. North St. Petersburg, FL

H/AT120R, H/AT100R specifications

Aquacal H/AT100R and H/AT120R are leading heat pump models designed to efficiently heat swimming pools while promoting energy savings and environmental sustainability. These units are renowned for their advanced technology and impressive performance, making them a popular choice among pool owners.

One of the standout features of the Aquacal H/AT series is its high-efficiency operation. Both models are equipped with a high-performance compressor and heat exchanger that work together to maximize heat transfer. This efficiency translates into lower energy consumption, which not only reduces utility bills but also minimizes the carbon footprint associated with pool heating.

The H/AT100R and H/AT120R utilize advanced refrigeration technology, integrating state-of-the-art components that enhance their overall reliability and durability. The titanium heat exchanger is particularly noteworthy as it provides exceptional resistance to corrosion, ensuring longevity in various water conditions. This means pool owners can enjoy their heated pools for years without worrying about the negative effects of chemical treatment or saltwater.

Another significant technological innovation in these models is the incorporation of a user-friendly digital control panel. This intuitive interface allows users to easily monitor and adjust the temperature settings, facilitating a customized swimming experience. Moreover, the H/AT series is equipped with a built-in timer, enabling automatic operation to ensure the pool is heated precisely when needed.

Aesthetically, the Aquacal H/AT100R and H/AT120R have been designed with a sleek, compact form factor that allows for easy installation in residential and commercial settings. Their quiet operation is another feature that enhances user experience, offering a tranquil swimming environment without the disruptive noise often associated with conventional heating systems.

In terms of environmental friendliness, both models are designed to utilize eco-friendly refrigerants, aligning with modern regulations and promoting sustainable pool heating solutions. This commitment to sustainability reflects Aquacal's proactive approach to meeting the needs of environmentally-conscious consumers.

In conclusion, the Aquacal H/AT100R and H/AT120R heat pumps are notable for their advanced technology, high energy efficiency, user-friendly operation, and environmentally responsible design. These features come together to provide pool owners with a reliable, effective, and sustainable solution for pool heating, ensuring that they can enjoy their aquatic space year-round without compromising on energy efficiency or environmental impact.
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