Pentair ULTRATEMP 140 - User Manual

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ULTRATEMP

®

HEAT PUMP

INSTALLATION AND

USER’S GUIDE

IMPORTANT SAFETY INSTRUCTIONS

READ AND FOLLOW ALL INSTRUCTIONS

SAVE THESE INSTRUCTIONS

ESPAÑOL

ENGLISH

FRANÇAIS

Table of Contents

Questions and Answers

M
millersandraSep 5, 2025
Why is my Pentair ULTRATEMP 140 Heat Pump showing a high water temperature alarm?
- C
  Christian CrawfordSep 6, 2025
  A high water temperature alarm on your Pentair Heat Pump indicates that the water temperature is above 107°F [41.7°C]. This can be due to a bad thermistor or a bad control board. Test the water temperature to ensure it's accurate. If the temperature reading is incorrect, use a 10k ohm resistance test to verify the thermistor. Replace the thermistor if it's faulty; otherwise, replace the control board.
D
Dawn MasonNov 19, 2025
Why does my Pentair ULTRATEMP 140 show a high refrigerant alarm?
- A
  Allison NelsonNov 20, 2025
  A high refrigerant alarm on your Pentair Heat Pump can stem from several issues. Begin by confirming that the water circulation pump is active and that there's sufficient water flow, ensuring filters and skimmers are clean via backwashing if needed. Also, check that any external water bypass around the heat pump is closed and all other valves are correctly positioned for proper water flow. A faulty refrigerant high-pressure switch could be the cause; check its resistance and replace if open. Other potential causes include a TXV stuck closed, in which case you should disconnect the TXV bulb from suction line, have it in your hand, if pressures go back to normal, then reinstall the bulb on suction line. For adjustable TXVs open adjustable valve, it may remove the debris and set it back to or...
V
vmatthewsSep 18, 2025
What does remote pool spa alarm mean on Pentair Heat Pump?
- B
  Bridget KingSep 18, 2025
  A REMOTE POOL SPA alarm on a Pentair Heat Pump indicates that the remote pool, spa, and common spade terminals on the back of the control board are all energized at the same time. To resolve this, modify the automation control output so that only either the pool and common or spa and common terminals are energized, but not all simultaneously.
M
Mr. Brandon PerezSep 16, 2025
How do I fix a suction th open alarm on my Pentair ULTRATEMP 140 Heat Pump?
- B
  Brian NelsonSep 16, 2025
  To address a suction th open alarm on your Pentair Heat Pump, which indicates an open defrost refrigerant temperature sensor circuit, begin by using the 10k ohm resistance test to verify the thermistor. If the test reveals an open circuit, replace the thermistor. If the thermistor is functioning correctly, the issue likely lies with the control board, necessitating its replacement.
J
josereedSep 14, 2025
What does suction th short alarm mean on Pentair ULTRATEMP 140?
- J
  John MorganSep 14, 2025
  If your Pentair Heat Pump displays a suction th short alarm, it indicates that the defrost refrigerant temperature sensor circuit is shorted. This is often due to a faulty thermistor or a bad control board. To fix this, use the 10k ohm resistance test to check the thermistor. If the test shows a short, replace the thermistor. If the thermistor is good, the problem is likely the control board, which will need to be replaced.
J
Jason HartSep 12, 2025
How to troubleshoot a water therm open alarm on a Pentair ULTRATEMP 140?
- W
  William PerezSep 13, 2025
  To troubleshoot a water therm open alarm on your Pentair Heat Pump, which indicates an open water temperature sensor circuit, start by testing the thermistor using the 10k ohm resistance test. If the test shows an open circuit, replace the thermistor. If the thermistor tests good, the issue is likely with the control board, which should be replaced.
M
Melanie ReedSep 12, 2025
What to do if Pentair Heat Pump shows water therm short alarm?
- V
  Victor PenaSep 12, 2025
  If your Pentair Heat Pump displays a water therm short alarm, it means the water temperature sensor circuit is shorted. This is often due to a bad thermistor or a bad control board. To resolve this, use the 10k ohm resistance test to verify the thermistor. If the test shows a short, replace the thermistor. If the thermistor is good, then the control board needs to be replaced.
A
Anthony RobertsSep 9, 2025
What does it mean when my Pentair Heat Pump displays a low water temperature alarm?
- K
  Kimberly SampsonSep 9, 2025
  A low water temperature alarm on your Pentair Heat Pump indicates that the water temperature is below 40°F [4.4°C]. This can be caused by a bad thermistor or control board, or debris shorting the connections. First, test the water temperature to see if the reading is correct. If it is not, use the 10k ohm resistance test to verify the thermistor. Replace the thermistor if it is bad, otherwise, replace the control board. Also, remove any debris or replace the PCB.
R
Rodney HarrisSep 7, 2025
Why is ice forming on my Pentair ULTRATEMP 140?
- A
  Andres Clayton Jr.Sep 7, 2025
  Ice or frost forming on the outer air coil of your Pentair Heat Pump, typically at the bottom, can occur if the discharge air flow is restricted. Ensure the heater is installed with the required placement clearances for air flow and roof clearance, and do not install it indoors. Also, ensure sprinklers do not spray on the heater. Another cause could be that the outside air temperature is too low and the defrost feature is not enabled. Make sure heater is installed with the required placement clearances for air flow and roof clearance, and do not install it indoors. If ice forms, shut off the heater and allow the ice to thaw.
J
Jill CollinsAug 22, 2025
What causes a low refrigerant alarm on a Pentair Heat Pump?
- A
  Anthony HernandezAug 22, 2025
  A low refrigerant alarm on your Pentair Heat Pump can occur due to several reasons. The most common cause is low refrigerant in the system, which requires locating and fixing the refrigerant leak, then pulling a vacuum and recharging the system. It can also happen if the air and water temperatures are too cold for the heat pump to operate; in this case, wait for warmer temperatures. A faulty refrigerant low-pressure switch can also trigger the alarm; check its resistance with a full charge and replace it if open. Lastly, a faulty fan, capacitor or fan motor could be the problem; inspect these components and replace if needed, also check the fan blade and make sure it is not slipping or broken and replace if needed.

Summary

IMPORTANT WARNING AND SAFETY INSTRUCTIONS

RISK OF ELECTRICAL SHOCK OR ELECTROCUTION

Critical safety warning about electrical hazards during installation.

Consumer Information and Safety

Safety rules and guidelines for operating the heat pump.

UltraTemp Heat Pump Overview

Heat Pump Installation Requirements

Essential prerequisites for safe and proper heat pump installation.

INSTALLATION AND LOCATION

Location and Clearances

Water Connections and Plumbing

Water Connections to the Heat Pump

Water Pressure Switch Adjustment

Electrical Connections and Wiring

Main Power

Step-by-step guide for connecting the heat pump to the electrical source.

Wiring Diagram - (Single Phase - 50 Hz;60 Hz)

Wiring Diagram - (Three Phase - 60 Hz)

CONNECTING TO AN AUTOMATION SYSTEM

Connecting the Heat Pump to the IntelliTouch or EasyTouch Control System Load Center via the Heat Pump Spade Terminals

Connecting the Heat Pump to the IntelliTouch or EasyTouch Control System Load Center via the RS-485 Connector

Pin Configuration for the Heat Pump Control Board to IntelliTouch Control System

Connecting the IntelliTouch or EasyTouch to Heat Pump

OPERATING THE HEAT PUMP

Heat Pump Control Panel Overview

Explanation of the heat pump's control panel buttons and indicators.

Operator Menu Tree Guide

Using the Control Panel

Starting and Stopping the Heat Pump

Instructions on how to turn the heat pump on and off.

Changing the Set Point (Temperature)

How to adjust the desired pool or spa water temperature.

Control Panel Alarm Messages

Service Menu Tree Guide

MAINTENANCE

Water Chemistry

Recommended water chemistry ranges for optimal heat pump performance and longevity.

Winterizing

Steps to properly prepare the heat pump for winter to prevent damage.

Spring Start Up

Procedures for starting the heat pump after winterizing.

Inspection and Service

Guidelines for regular user inspections of the heat pump.

Professional Maintenance and Service

TECHNICAL INFORMATION

Electrical Supply - Voltage Requirements

Table detailing electrical specifications for various models.

REPLACEMENT PARTS

Parts List

List of all available replacement parts with numbers.

TROUBLESHOOTING

HIGH WATER TEMPAlarm

Troubleshooting steps for high water temperature alarms.

LOWWATER TEMPAlarm

LOWWATER FLOWAlarm

Troubleshooting steps for low water flow alarms.

HIGH REFRIGAlarm

LOWREFRIGAlarm

Higher than Normal Head Pressure

Lower than Normal Head Pressure

Unit runs, but breaker trips continuously

Problems and Corrective Action (3 Phase Units Only)

Pentair ULTRATEMP 140 Specifications

General

Model	ULTRATEMP 140
Category	Heat Pump
Refrigerant	R-410A
Voltage	230V
Phase	Single
Frequency	60 Hz
Rated Amperage	30 A
Operating Range	50°F - 104°F
Heating Capacity	140, 000 BTU/hr

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