Bosch SV036 User Manual

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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:

M
Mary HillAug 18, 2025
How to reduce noise levels from my Bosch SV036?
- P
  pwhiteAug 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.
R
Randall ByrdAug 20, 2025
Why is my Bosch SV036 Heat Pump compressor so noisy?
- T
  Todd PeckAug 20, 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.
J
jennifer77Aug 23, 2025
Why is the fan not working on my Bosch Heat Pump with a constant airflow motor?
- A
  Anthony JonesAug 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.
H
Heidi BenjaminAug 26, 2025
What to check if the fan isn't working on my Bosch Heat Pump with a constant torque motor?
- J
  James CraigAug 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.
J
Joshua HendersonAug 28, 2025
How do I troubleshoot a Bosch SV036 Heat Pump fan that isn't working (PSC motor)?
- R
  Robert Owens DVMAug 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.
B
Brandon CurryAug 30, 2025
Why is there high humidity with my Bosch SV036 Heat Pump?
- R
  Robert AlexanderAug 30, 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
James SchultzSep 2, 2025
What to do if my Bosch SV036 has excessively warm air in cooling or cool air in heating?
- B
  Benjamin EdwardsSep 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.
T
Tony BradleySep 4, 2025
Why is my Bosch SV036 Heat Pump blowing excessively cold air in cooling or hot air in heating?
- R
  Ricardo AdamsSep 5, 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.
M
melissa96Sep 9, 2025
Why won't my Bosch Heat Pump switch to cooling mode?
- M
  Monique JamesSep 9, 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.
A
Alexis MartinSep 12, 2025
What to do if my Bosch SV036 compressor and fan aren't working?
- D
  Douglas RaySep 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.

Bosch SV036 Specifications

General

Brand	Bosch
Model	SV036
Category	Heat Pump
Language	English

Summary

MODEL NOMENCLATURE

SAFETY CONSIDERATIONS

GENERAL DESCRIPTION

MOVING AND STORAGE

LOCATION

WATER QUALITY

INSTALLATION

DUCT FLANGES

Features fold-out flanges for easier installation and handling.

MOUNTING VERTICAL UNITS

Instructions for level mounting on vibration pads for vertical units.

MOUNTING HORIZONTAL UNITS

Guidance on suspending horizontal units using threaded rods and brackets.

HANGING BRACKET KIT

CONVERTING HORIZONTAL SUPPLY AIR CONFIGURATION

CONDENSATE CONNECTIONS

PIPING

ELECTRICAL - HIGH VOLTAGE

ELECTRICAL - LOW VOLTAGE

UNIT CONTROLS - UPM

ECM INTERFACE BOARD

Description of the ECM interface board and its connections for thermostat and motor control.

AIRFLOW SELECTOR

Allows adjustment of airflow to meet application requirements and ease troubleshooting.

DEHUMIDIFICATION METHOD SELECTOR

Selects between hot gas reheat or fan speed reduction for dehumidification.

SEQUENCE OF OPERATION

UPM SAFETY FEATURES

COOLING AND HEATING MODES

Explains how the unit operates in cooling and heating modes based on thermostat signals.

UPM BOARD FACTORY DEFAULT SETTINGS

UPM DIP SWITCH DEFAULT POSITION

UPM FAULT BLINK CODES

OPTIONS

EXTENDED RANGE OPTION

Details on the extended range option for extreme fluid temperatures.

UNIT MOUNTED NON-FUSED DISCONNECT SWITCH

Describes the optional unit-mounted disconnect switch for electrical isolation.

HOT GAS REHEAT

Explanation of the hot gas reheat option for active dehumidification.

DDC CONTROLS

Information on factory-mounted DDC controls available as an option.

INTERNAL 2-WAY WATER VALVE

Description of the factory-mounted motorized water valve option for the unit.

APPLICATION CONSIDERATIONS

BOILER/COOLING TOWER SYSTEMS

Guidance on water loop temperatures and treatment for boiler/cooling tower systems.

GEOTHERMAL CLOSED LOOP SYSTEMS

CERTIFIED PERFORMANCE TABLE

FAN MOTOR OPTIONS

PERMANENT SPLIT CAPACITOR MOTORS (PSC)

Information on the standard three-speed PSC fan motor and its speed adjustment.

CONSTANT TORQUE MOTORS (ECM)

Details on the ECM motor option for constant torque applications.

CONSTANT AIRFLOW MOTORS (ECM)

Features of the ECM motor option for constant airflow delivery.

STANDARD BLOWER MOTOR

CONSTANT TORQUE ECM BLOWER MOTOR

CONSTANT CFM ECM BLOWER MOTOR

UNIT START UP

MAINTENANCE

UNIT CHECK OUT SHEET

TROUBLESHOOTING

UNIT TROUBLESHOOTING

A guide to diagnosing and resolving common unit problems based on fault indicators.

TEMPERATURE/PRESSURE TABLE

WATERSIDE PRESSURE DROP TABLE

WATER COIL VOLUME

COMPRESSOR CHARACTERISTICS

CORNER WEIGHTS (HZ)

WIRING DIAGRAMS

DIMENSIONAL DRAWINGS

VERTICAL

Diagrams showing dimensions for vertical unit configurations.

HORIZONTAL

Diagrams showing dimensions for horizontal unit configurations.

COUNTER-FLOW

Diagrams showing dimensions for counter-flow unit configurations.

NOTES

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