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Bosch SV012 - User Manual

Bosch SV012
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Installation, Operation and Maintenance Manual
Model SV - i Series Geothermal Heat Pump
8 733 914 818 (2014/08)
SV007 Thru SV070
Made in Florida

Table of Contents

Questions and Answers

  • E
    Eric BentleyAug 18, 2025
    How to reduce noise levels from my Bosch SV012 Heat Pump?
    • W
      wburnsAug 18, 2025
      To reduce objectionable noise levels from your Bosch Heat Pump, consider the following: Ensure the duct work and grilles are properly sized for the unit's air flow. If the fan speed is too high, consult the blower performance table and reduce it if possible. Make sure the unit is mounted on a full vibration pad. Ensure the unit is installed correctly and adjust the unit location to prevent it from touching the structure.
  • F
    Frank BensonAug 21, 2025
    Why is my Bosch SV012 Heat Pump compressor so noisy?
    • P
      Paula SmithAug 21, 2025
      If your Bosch Heat Pump compressor is noisy, it could be due to high water temperature or low water flow rate, which elevates the head pressure. If possible, increase the water flow rate and/or reduce the water temperature. Another cause could be a scaled or fouled water coil, which also elevates the heat pressure; in this case, clean/descale the water coil. Low air flow can also cause compressor noise, so check the filter and increase fan speed.
  • S
    Samantha MillerAug 23, 2025
    Why is the fan not working on my Bosch Heat Pump with a constant airflow motor?
    • B
      Brandy CunninghamAug 23, 2025
      If the fan on your Bosch Heat Pump with a constant airflow motor isn't working, check the following: Ensure there's a fan operation signal by checking for 24 VAC between "G" and "C", and verify all wiring connections, including the thermostat connection plug. Inspect for loose wiring at the motor and control box, ensuring power and control harnesses are securely connected. Examine the interface board for damage and ensure all DIP switches are in the correct configuration. Finally, check the supply voltage to the motor, ensure all motor wires are secure, and test the motor by moving the "TEST" DIP switch to "ON" and the other switches to "OFF" on the "ADJUST" switch block on the interface board.
  • D
    Diana FloresAug 26, 2025
    What to check if the fan isn't working on my Bosch SV012 Heat Pump with a constant torque motor?
    • A
      Amanda BriggsAug 26, 2025
      If the fan isn't working on your Bosch Heat Pump with a constant torque motor, first check for a fan operation signal by ensuring there is 24 VAC between "G" and "C", and check all wiring connections. Also, inspect for loose wiring at both the motor and the control box. Finally, check the supply voltage to the motor, make sure all motor wires are secure, and with the power off, spin the motor shaft to check for noise, resistance, or uneven motion, which could indicate motor failure.
  • R
    Rebecca SheltonAug 28, 2025
    How do I troubleshoot a Bosch SV012 Heat Pump fan that isn't working (PSC motor)?
    • R
      Robert GutierrezAug 28, 2025
      To troubleshoot a Bosch Heat Pump fan that isn't working and uses a PSC motor, start by checking the supply voltage from the fan relay to the motor and ensure all motor wires are secure. Next, check for a fan operation signal by verifying 24 VAC across the fan relay coil and inspecting all wiring connections. If the relay coil is energized but the relay doesn't pull in, check the resistance across the relay coil, as an open circuit indicates a faulty relay. With the power off, spin the motor shaft to check for noise, resistance, or uneven motion, which can indicate motor failure.
  • D
    David RobinsonAug 30, 2025
    Why is there high humidity with my Bosch Heat Pump?
    • J
      jose16Aug 31, 2025
      High humidity with your Bosch Heat Pump may be due to several reasons. The fan speed setting might be too high, so consult the blower performance table and reduce the fan speed if possible. There could be low refrigerant levels, so check the refrigerant pressures with a gauge set. The unit might be oversized for the space, so check the unit performance against building load calculations. Also, the thermostat might be poorly located, such as near a supply air duct; relocate it if necessary.
  • J
    Javier BondSep 2, 2025
    What to do if my Bosch SV012 Heat Pump has excessively warm air in cooling or cool air in heating?
    • L
      Leah BurtonSep 2, 2025
      If your Bosch Heat Pump is producing excessively warm air during cooling or excessively cool air during heating, several factors could be responsible. The fan speed setting may be too high; if so, consult the blower performance table and reduce the fan speed if possible. The inlet water temperature may be out of range; check the unit capacity versus the water temperature. Leaky duct work could also be a factor, so inspect the duct work. Finally, low refrigerant levels can cause this issue, so check the refrigerant pressures with a gauge set.
  • R
    Rickey JosephSep 4, 2025
    Why is my Bosch Heat Pump blowing excessively cold air in cooling or hot air in heating?
    • P
      porterkristopherSep 4, 2025
      If your Bosch Heat Pump is blowing excessively cold air in cooling mode or excessively hot air in heating mode, start by replacing the dirty filter. Also, the fan speed might be too low; consult the blower performance table and increase the fan speed if possible. Lastly, excessive duct pressure drop could be the issue; consult the blower performance table and increase the fan speed if possible to compensate.
  • R
    Richard NealSep 9, 2025
    Why won't my Bosch SV012 switch to cooling mode?
    • M
      Margaret NunezSep 10, 2025
      If your Bosch Heat Pump isn't shifting into cooling mode, there are a few things you can check. First, see if the reversing valve solenoid is receiving 24 VAC; if it is, check the solenoid's resistance, as an open circuit may indicate a burned-out solenoid. Next, check that the reversing valve thermostat wire is connected to the "O" terminal of the thermostat and that there's a contact closure between "O" and "R". Lastly, make sure the wires from the thermostat to the unit and from the electrical box to the reversing valve are securely connected.
  • R
    Richard WoodwardSep 12, 2025
    What to do if my Bosch Heat Pump compressor and fan aren't working?
    • M
      Michael BartonSep 12, 2025
      If neither the compressor nor the fan is operating on your Bosch Heat Pump, first ensure that the supply voltage to the unit is within the range shown on the unit data plate. Then, check for 24 VAC between "R" and "C" on the unit terminal block to verify the control transformer is functioning. For 75 and 100 VA transformers, check that the transformer circuit breaker has not tripped. Before replacing the transformer, check the low voltage circuit for overload conditions or short circuits.

Summary

Installation, Operation and Maintenance Manual

Model Nomenclature

Model Identification Breakdown

Details the meaning of each character in the model number for identification.

Unit Configuration Options

Lists available options for cabinet, water connections, and return air configuration.

Component Specification Codes

Explains codes for air filtration, electrical options, and fan/motor types.

Safety and General Description

Safety Warnings and Precautions

Essential safety information for installation, servicing, and operation.

Unit Features and Capabilities

Overview of the SV series heat pump's performance, flexibility, and application suitability.

Installation Preparation

Moving, Storage, and Inspection

Guidelines for handling, storing, inspecting units upon arrival, and initial checks.

Unit Location and Environment

Specifies requirements for unit placement, clearance, and environmental conditions.

Installation Procedures

Duct Flange Preparation

Instructions for preparing and using the unit's fold-out duct flanges.

Mounting Vertical and Horizontal Units

Details on mounting units securely and level, including vibration isolation.

Water Quality

Water Quality Parameters

Details acceptable water quality characteristics for optimal heat pump performance and longevity.

Hanging Bracket Kit

Suspended Mounting Instructions

Steps for installing the hanging bracket kit for suspended horizontal unit mounting.

Converting Horizontal Supply Air

Airflow Direction Conversion

Procedures for field conversion of horizontal unit supply air from end to straight-through.

Condensate Connections

Drain Line Requirements

Specifies requirements for condensate drain lines, including traps and venting.

Duct System

Ductwork Considerations

Outlines requirements for return air duct flanges and supply air connections.

Piping

Water Piping Installation

Guidelines for supply and return water piping, including material and connection recommendations.

Electrical - High Voltage

Power Supply and Wiring

Details compliance with electrical codes and proper power supply connections for units.

Electrical - Low Voltage

Thermostat Wiring

Instructions for connecting thermostat wiring to the unit's control board.

Unit Control Module (UPM)

ECM Interface Board Functionality

Explains the ECM interface board's role in controlling the fan motor and status indication.

Thermostat and Control Inputs

Details thermostat connections and options for controlling unit operation.

Unit Control Settings

Airflow and Dehumidification Adjustment

How to adjust airflow and select dehumidification methods for optimal performance.

UPM Safety and Operational Modes

UPM Safety Feature Integration

How the UPM monitors and controls safety features to protect unit components.

Cooling and Heating Mode Operation

Explains the sequence of reversing valve and thermostat signals for cooling and heating.

UPM Protection Sensors

Freeze Protection Sensors

Details the operation of water and evaporator freeze protection sensors.

Condensate Overflow Sensor

Describes the condensate overflow sensor and its function in preventing unit damage.

UPM Board Configuration and Faults

DIP Switch Settings and Defaults

Guidance on setting DIP switches for various UPM functions and default configurations.

Fault Blink Code Interpretation

A guide to understanding LED blink codes for diagnosing specific unit faults.

UPM Advanced Functions

Test Mode and Freeze Sensor Adjustments

How to use the test mode and adjust freeze sensor trip points for troubleshooting.

Resetting Lockouts and Faults

Procedures for resetting intelligent and manual lockouts and clearing faults.

Available Unit Options

Extended Range and Reheat Options

Information on extended range operation and hot gas reheat for enhanced performance.

DDC Controls and Water Valve Integration

Details on optional DDC controls and the internal 2-way water valve for advanced system integration.

Application Considerations

Boiler;Cooling Tower System Integration

Guidelines for connecting the unit to boiler and cooling tower systems for optimal performance.

Geothermal System Applications

Closed Loop Installation Requirements

Specific requirements and cautions for installing units in closed loop geothermal systems.

Certified Performance Data

AHRI Performance Ratings

Comprehensive tables of AHRI-certified performance ratings for all SV series models.

Fan Motor Options Overview

PSC Motor Specifications and Adjustment

Details on the standard PSC motor, its speed settings, and performance data.

ECM Fan Motor Options

Constant Torque ECM Motor Features

Explains the constant torque ECM motor, its efficiency, and speed control.

Constant Airflow ECM Motor Features

Highlights the advanced features of constant airflow ECM motors for precise air delivery.

Constant Torque ECM Motor Performance

Performance Data Tables

Provides performance data for constant torque ECM motors across various models.

Constant Airflow ECM Motor Capabilities

Advanced ECM Motor Functions

Details features like low CFM ventilation and passive dehumidification for ECM motors.

Constant Airflow ECM Motor Performance

Performance Data Tables

Presents performance data for constant airflow ECM motors across different settings.

Standard Blower Motor Specifications

Electrical Data and Ratings

Lists electrical specifications, including FLA and fuse/HACR ratings, for standard blower motors.

Constant Torque ECM Motor Specifications

Electrical Data and Ratings

Provides electrical data for constant torque ECM motors, including FLA and circuit ampacity.

Constant CFM ECM Motor Specifications

Electrical Data and Ratings

Lists electrical specifications for constant CFM ECM motors, including FLA and fuse/HACR ratings.

Unit Start Up and Maintenance

Initial Unit Start Up Procedure

Step-by-step instructions for powering up and verifying the unit's operation.

Routine Maintenance and Checkups

Recommended maintenance tasks, filter changes, and annual service checks for longevity.

Unit Performance Check

Data Recording and Contact Information

Form for recording unit data and contact details for technical support.

Troubleshooting Common Issues

Compressor Operation Faults

Diagnosing and resolving issues when the compressor does not operate but the fan runs.

Troubleshooting Fault Indicators

LED Blink Code Diagnostics

Interpreting LED blink codes to identify specific faults like condensate overflow or brownouts.

Troubleshooting Operational Failures

No Compressor or Fan Operation

Steps to troubleshoot when neither the compressor nor the fan operates.

Troubleshooting Performance Problems

Airflow and Temperature Issues

Resolving problems related to incorrect airflow or supply air temperatures.

Troubleshooting Environmental Factors

Noise, Humidity, and Water Hammer

Addressing issues like unit noise, high humidity, and water hammer.

Operating Data Tables

Temperature;Pressure Data (SV007, SV009)

Tables providing operating data for SV007 and SV009 models across various temperatures and flow rates.

Waterside Performance Data

Pressure Drop and Coil Volume

Data on waterside pressure drop and water coil volume for different SV series models.

Compressor Characteristics

Compressor Data Plate Information

Details compressor specifications including RLA, LRA, and winding resistance values.

Horizontal Unit Corner Weights

Weight Distribution for HZ Models

Provides corner weight data for horizontal units based on configuration and return air.

Wiring Diagrams Overview

Single Phase PSC Motor Wiring

Wiring diagram for single-phase units utilizing PSC fan motors.

Wiring Diagrams for Specific Motors

1-Phase X13 Motor Wiring Diagram

Wiring diagram for units equipped with 1-stage, 1-phase X13 motors.

Wiring Diagrams for EON Motors

1-Phase EON Motor Wiring Diagram

Wiring diagram illustrating connections for units with 1-stage, 1-phase EON motors.

Dimensional Drawings - Vertical Units

Vertical Unit Dimensions and Features

Detailed dimensions, port locations, and filter sizes for vertical models.

Dimensional Drawings - Horizontal Units

Horizontal Unit Dimensions and Features

Detailed dimensions, port locations, and filter sizes for horizontal models.

Dimensional Drawings - Counter-Flow Units

Counter-Flow Unit Dimensions and Features

Detailed dimensions, port locations, and filter sizes for counter-flow models.

Bosch SV012 Specifications

General IconGeneral
BrandBosch
ModelSV012
CategoryHeat Pump
LanguageEnglish

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