Bosch TA Series User Manual

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

Bosch TA Series Specifications

General

Brand	Bosch
Model	TA Series
Category	Heat Pump
Language	English

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.