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Bosch IDS BOVA20 User Manual

Bosch IDS BOVA20
44 pages
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Installation Instructions
Split System Heat Pump
Bosch IDS BOVA20 & BOVC20
Condensing Units Up to 20.5 SEER | 2-3-4-5 Ton Capacity | R410A
BTC 761703107 A / 09.2023

Table of Contents

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Bosch IDS BOVA20 Specifications

General IconGeneral
BrandBosch
ModelIDS BOVA20
CategoryHeat Pump
LanguageEnglish

Summary

Key to Symbols and Safety Instructions

Key to Symbols

Explains warning symbols and keywords like DANGER, WARNING, CAUTION, NOTICE.

Safety

Provides warnings about electrical hazards and general installation advice.

Unit Location Considerations

Unit Dimensions

Provides dimensions for BOVC-36 and BOVA-60 models in inches.

Refrigerant Piping Limits

Details maximum equivalent lengths and vertical separations for refrigerant lines.

Location Restrictions

Specifies clearance requirements and placement considerations for outdoor units.

Unit Preparation

Prepare the Unit for Installation

Instructions for checking unit for shipping damage and verifying refrigerant charge.

Setting the Unit

Pad Installation

Guidelines for installing the unit on a support pad, including size and levelness.

Refrigerant Line Considerations

Refrigerant Line and Service Valve Connection Sizes

Lists connection sizes for liquid and suction lines for different models.

Required Refrigerant Line Length

Refers to Section 2.2 for determining required line length.

Refrigerant Line Insulation

Emphasizes the need for suction line insulation and avoiding metal-to-metal contact.

Reuse Existing Refrigerant Lines

Precautions for reusing existing refrigerant lines, including checking for leaks and brazing.

Refrigerant Line Routing

Precautions

Advises on preventing noise transmission and proper installation methods for refrigerant lines.

Refrigerant Line Brazing

Braze The Refrigerant Lines

Details the process of preparing and brazing refrigerant lines for installation.

Refrigerant Line Leak Check

Check For Leaks

Describes pressurizing lines with nitrogen and checking for leaks using soapy solution.

Evacuation

Evacuate the Refrigerant Lines and Indoor Coil

Instructions on evacuating the system to a specific micron level.

Service Valves

Open the Service Valves

Steps for safely opening service valves after leak check and evacuation.

Electrical - Low Voltage

Low Voltage Maximum Wire Length

Table defining maximum wire lengths based on wire gauge.

Low Voltage Hook-Up Diagrams

Notes on making low voltage connections inside the outdoor unit control board.

Thermostat Wiring Diagrams

Guidance on connecting thermostat wiring, including auxiliary heat.

Electrical - High Voltage

High Voltage Power Supply

Specifies matching the high voltage power supply to the equipment nameplate.

High Voltage Disconnect Switch

Instructions for installing a separate disconnect switch at the outdoor unit.

High Voltage Ground

Requirements for grounding the outdoor unit according to codes.

Start Up

System Start Up

Step-by-step instructions for starting the system after completing previous sections.

System Charge Adjustment

Charging: Weigh-In Method

Explains the weigh-in method for charging the system initially or when charge is replaced.

Subcooling Charging And Refrigerant Adjustment In Cooling (Above 55°F Outdoor Temp.)

Details subcooling method for charging above 55°F outdoor ambient temperatures.

System Operation and Troubleshooting

Control Logic Description

Describes the variable speed system's control logic and adaptive capacity functions.

Sensors (Thermistors/Pressure Transducer)

Lists various sensors used in the system and their functions.

Pressure Equalizer Valve (PEV)

Explains the function of the PEV in balancing pressure before compressor startup.

Defrost Description

Details the Demand Defrost Control (DDC) and conditions for defrost initiation and termination.

Compressor Crankcase Heater Description

Explains the purpose and operation of the compressor crankcase heater.

Reversing Valve Operation

Describes when the reversing valve energizes and de-energizes.

Protection Functions

Outlines various protection functions like coil temperature, ambient temperature, and pressure.

Fault Code Table

A table listing fault codes, their descriptions, and sensor information.

Parameter Point Check Table

Explains how to display and interpret system parameters using the check button.

Control Board Overviews

Provides a detailed overview of the main control board components and their functions.

Error Code Troubleshooting

Troubleshooting flowcharts for various error codes like C3, E4, E5, E6.

Temperature and Resistance Relationship Tables (for Sensors)

Temperature and Resistance Relationship Tables (for T5 & Tf Sensors)

Wiring Diagram

Care and Maintenance

Cleaning Precautions

Safety precautions and guidelines for cleaning the outdoor unit.

Maintenance - Pre-Season Inspection

Steps for performing a pre-season inspection of the unit.

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