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Bosch TA Series - User Manual

Bosch TA Series
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Installation and Maintenance Manual
TA Series
6 720 220 046
Revised 05-12

Table of Contents

Questions and Answers

  • M
    Michael DillonJul 27, 2025
    What to do if my Bosch TA has no flow or low flow?
    • B
      Bob HarrisJul 27, 2025
      If your Bosch Heat Pump experiences no flow or low flow, several factors could be the cause. Here's what you can check: * Ensure the power supply is working. * Verify the on/off switch is in the 'ON' position. * Engage the heat pump contactor. * Inspect for and repair any broken or loose wires. * Purge any air from the piping system. * Remove the pump cartridge and clean it if the pump shaft/impeller is stuck. * Consider replacing the pump if it's defective. * Repair any kinks in the water piping and check for proper line size.
  • I
    Isabel HernandezAug 6, 2025
    Why is my Bosch TA Heat Pump showing a high water temperature?
    • C
      Carolyn JohnsonAug 6, 2025
      A high water temperature in your Bosch Heat Pump could be due to a water temperature limit being closed. This can happen if the limit switch is stuck or if the sensor is not securely attached to the line.
  • D
    danielleariasAug 16, 2025
    How to improve low heat output in my Bosch Heat Pump?
    • L
      Lisa SchroederAug 16, 2025
      If your Bosch Heat Pump has low heat output, the heat exchanger may be scaled or fouled. Cleaning the heat exchanger may resolve this issue.

Summary

Installation Preparation

Safety Considerations

Important safety precautions for installation and servicing.

Location and Installation

Mounting Vertical Units

Unit Mounting and Drainage

Mounting Horizontal Units

Condensate Drain System

Procedures for connecting and pitching condensate drain lines.

System Connections and Utilities

Duct System Installation

Piping Requirements

Electrical Wiring

Control System Interface

ECM Interface Board

Overview of the ECM interface board and its functions.

Thermostat Wiring

Details on wiring thermostats to the ECM interface board for control.

Unit Protection and Safety Devices

UPM Controller Overview

Introduction to the Unit Protection Module and its role.

Safety Control Features

List and description of safety controls integrated into the UPM.

UPM Operational Features

Explanation of the Unit Protection Module's safety features and operation.

UPM Fault Diagnosis and Reset

UPM Fault Indicators (LEDs)

Guide to interpreting LED blink codes for fault diagnosis.

Fault Handling and Resets

How the unit handles fault conditions and resets automatically or manually.

UPM Sequence of Operation Flow Chart

Operational Sequences

Cooling Mode Operation

Heating Mode Operation

Advanced Operation and System Types

Two-Stage Sequence of Operation

System Installation and Checkout

System Checkout Procedures

Pre-energization checks for proper installation.

Unit Startup Guide

Troubleshooting and Initial Setup

General Troubleshooting

Common problems and their solutions for the unit.

Initial Startup Checklist

Regular Maintenance Schedule

Filter Maintenance

Annual Mechanical Checkup

Condensate Drain Maintenance

Periodic Lockout Diagnosis

Wiring Diagrams and Legends

Wiring Diagram Notes

Electric Heat Wiring Diagram

Dual Power Supply Warning

Status LED Fault Codes

Electric Heat Wiring Notes

Unit Check-Out and Commissioning

Operating Conditions Recording

Troubleshooting Common Issues

Unit Startup Failures

Diagnosing and resolving issues when the unit fails to start.

Compressor Non-Operation

Troubleshooting common issues with compressor non-operation.

High Pressure Control Issues

Identifying causes for high-pressure control shutdowns.

Low Pressure Control Issues

Identifying causes for low-pressure control shutdowns.

Unit Short Cycling Problems

Diagnosing and resolving short-cycling issues.

Advanced Troubleshooting and UPM Diagnostics

Insufficient Cooling;Heating Output

Addressing issues related to inadequate cooling or heating output.

UPM Board Diagnostic Flowchart

Flowchart for diagnosing UPM board issues.

Bosch TA Series Specifications

General IconGeneral
BrandBosch
ModelTA Series
CategoryHeat Pump
LanguageEnglish

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