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Aqua Comfort AC1500 - User Manual

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1
OWNER’S MANUAL
Vintage Signature Series models: AC750, AC1050, AC1100, AC1250, AC1500, AC1750
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 9-10
MAINTENANCE 10
TROUBLESHOOTING CHECKLIST 11
CALLING FOR SERVICE 12
WARRANTY 13
WARRANTY REGISTRATION 14
Proudly Made in the USA
support@aquacomfort.com
888
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475
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7443
ALL IN-GROUND
MODELS
INSTALLATION,
OPERATION,
MAINTENANCE
& SERVICE

Table of Contents

Questions and Answers

  • A
    April BrockAug 14, 2025
    What to do if the Internal Flow Switch is Open on my Aqua Comfort AC1500?
    • M
      Matthew JonesAug 14, 2025
      If the internal flow switch on your Aqua Comfort Swimming Pool Heater is open, it could be due to several reasons. First, check that the pump is running and ensure there's sufficient water supply, looking for any air leaks. The filter might be dirty or clogged, so clean or replace it. Make sure that valves are correctly positioned and that the filter is not in backwash mode. An undersized pump can also cause this issue, so consider replacing it with an appropriately sized pump. Finally, the water pressure switch might need adjustment or replacement.
  • J
    jrogersAug 17, 2025
    Why is the Low Pressure Switch Open on my Aqua Comfort AC1500?
    • B
      Brian CraigAug 18, 2025
      If the low-pressure switch is open on your Aqua Comfort Swimming Pool Heater, several factors could be the cause. The evaporator coil might be dirty, so cleaning it is a good first step. Check if the fan motor is running; if not, repair or replace it. Low refrigerant pressure can also trigger this issue, so check the refrigerant levels and recharge if necessary. Finally, the low-pressure switch itself might be defective and require replacement.
  • J
    Jamie RobertsAug 21, 2025
    What causes the High Pressure Switch to Open on an Aqua Comfort Swimming Pool Heater?
    • M
      Melissa WhiteAug 21, 2025
      If the high-pressure switch is open on your Aqua Comfort Swimming Pool Heater, it could be due to low water flow to the heater. Make sure that there is adequate water flow. Alternatively, the high-pressure switch itself may be defective and need replacement.
  • T
    tammyandersenAug 25, 2025
    How to fix a Water Thermistor Open error on Aqua Comfort Swimming Pool Heater?
    • T
      Terri RamirezAug 25, 2025
      If you're getting a 'Water Thermistor Open' error on your Aqua Comfort Swimming Pool Heater, it could be due to a loose sensor wire, so ensure that it is secure. If the wire is secure, the water thermistor itself might be defective and need replacement.
  • D
    Destiny McculloughAug 29, 2025
    What should I do if the Water Thermistor is Closed on my Aqua Comfort AC1500 Swimming Pool Heater?
    • T
      Terry StaffordAug 29, 2025
      If the water thermistor is closed on your Aqua Comfort Swimming Pool Heater, it could be because the wire terminals are touching; try separating them. If that doesn't resolve the issue, the water thermistor itself might be defective and need replacement.
  • R
    rbarkerSep 1, 2025
    What does it mean when the Defrost Sensor is Open on an Aqua Comfort Swimming Pool Heater?
    • B
      bchristensenSep 1, 2025
      If the defrost sensor is open on your Aqua Comfort Swimming Pool Heater, it could indicate a loose sensor wire. Make sure the wire is secure. If the wire is properly connected, the defrost sensor itself may be defective and require replacement.
  • B
    berryjerrySep 5, 2025
    Why is my Aqua Comfort AC1500 Swimming Pool Heater showing a Defrost Sensor Closed error?
    • N
      Nicole BartonSep 5, 2025
      If your Aqua Comfort Swimming Pool Heater shows a 'Defrost Sensor Closed' error, it might be because the wire terminals are touching. Separate the terminals and see if that resolves the issue. If not, the defrost sensor itself may be defective and require replacement.
  • K
    Kevin RoseSep 9, 2025
    What to do if the Control Voltage is Below 18VAC on my Aqua Comfort AC1500?
    • B
      Brian ReillySep 9, 2025
      If the control voltage is below 18VAC on your Aqua Comfort Swimming Pool Heater, check the supply voltage to the unit.

Summary

Safety Considerations

Installation

Electrical Connections

Wiring Main Power Supply

Steps for connecting the main power to the heater unit safely and correctly.

Modes of Operation

Electronic Control Panel

Temperature Setpoint Adjustment

Pool;Spa Mode Selection

Chemical Use

Start-Up Procedures

Initial Heating Process Guide

Factors and steps affecting the initial heating time of the pool water.

Maintenance Guidelines

Heater Protection and Cleaning

Essential maintenance for protecting the heater and ensuring airflow.

Winterizing the Pool Heater

Troubleshooting Checklist

Calling for Service

Aqua Comfort AC1500 Specifications

General IconGeneral
BrandAqua Comfort
ModelAC1500
CategorySwimming Pool Heater
LanguageEnglish

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