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Bosch EP030 - User Manual

Bosch EP030
44 pages
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Installation and Maintenance Manual
EP Series
8733953041 (2019/01)
EP007, EP009, EP012, EP015, EP018, EP024, EP030, EP036, EP042, EP048, EP060,EP070

Table of Contents

Questions and Answers

  • G
    gloria33Aug 17, 2025
    What to do if my Bosch Heat Pump is off on high pressure control?
    • S
      Shelley PriceAug 17, 2025
      If your Bosch Heat Pump shuts off due to high pressure, it could be due to several reasons. In cooling mode, check for inadequate water flow, excessively warm entering water temperature, or a scaled or plugged condenser. In heating mode, ensure adequate airflow by checking for an inoperative blower, clogged filter, or restrictions in the ductwork. Also, the unit might be overcharged with refrigerant, so reclaim the excess, evacuate, and recharge it with the factory-recommended amount. Finally, inspect the high-pressure switch for defects or improper calibration.
  • C
    coffeyedwinAug 22, 2025
    Why is the blower operating but the compressor not in my Bosch Heat Pump?
    • E
      elizabethkingAug 22, 2025
      If your Bosch Heat Pump's blower is running but the compressor isn't, check the thermostat settings, calibration, and wiring. Inspect for loose or broken wires at the compressor, capacitor, or contactor. Check the UPM board's red default LED for a Blink Code. If the compressor is cool and the overload won't reset, it may need replacement. A compressor motor grounded internally to the shell also necessitates replacement. After the compressor cools, check the continuity of its windings; open windings indicate the need for a replacement.
  • J
    Joshua GriffinAug 27, 2025
    What causes a Bosch EP030 to turn off on low pressure control?
    • D
      David HutchinsonAug 27, 2025
      If your Bosch Heat Pump is turning off due to low pressure, the suction pressure might be too low. In cooling mode, this could be due to inadequate airflow, excessively cold entering air temperature, an inoperative blower, a clogged filter, or ductwork restrictions. In heating mode, it could be due to inadequate water flow, excessively cold entering water temperature, or a scaled or plugged condenser. Also, the unit might be low on refrigerant, so check for leaks, repair them, evacuate the system, and recharge it with the factory-recommended amount. Finally, inspect the low-pressure switch for defects or improper calibration.
  • R
    rgarciaSep 1, 2025
    Why does my Bosch EP030 Heat Pump unit short cycle?
    • J
      james07Sep 1, 2025
      If your Bosch Heat Pump is short cycling, it might be oversized for the space, so recalculate the heating and cooling loads. The thermostat could be installed near a supply air grill; if so, relocate it and readjust the heat anticipator. Also, check the wiring and controls for a defective or improperly calibrated low-pressure switch.
  • M
    Michele RichNov 6, 2025
    How to troubleshoot a Bosch EP030 Heat Pump that does not run?
    • R
      Robert DavisNov 6, 2025
      If your entire Bosch Heat Pump unit isn't running, start by ensuring the power supply is on and the disconnect is closed. Check for blown fuses and replace them or reset the circuit breaker, making sure you're using the correct fuses. If the voltage supply is lower than the minimum specified on the unit's data plate, contact your local power company. Also, check the thermostat settings, calibration, and wiring. Set the fan to “ON”—it should run. Set the thermostat to “COOL” at the lowest temperature; the unit should cool. Set it to “HEAT” at the highest temperature; the unit should heat. If the blower or compressor doesn't run in any of these cases, the thermostat might be miswired or faulty. Verify 24 volts at the low voltage terminal strip between “R” and “C”, “Y” and “C”, and “O” and “C...
  • F
    Faith FischerNov 11, 2025
    Why is my Bosch Heat Pump providing insufficient cooling or heating?
    • J
      Jim GarciaNov 11, 2025
      If your Bosch Heat Pump isn't providing enough cooling or heating, several factors could be at play. First, the unit might be undersized, so recalculate the heating or cooling loads. Adding insulation and shading might help. Check for air leaks in the ductwork or from outside through doors and windows. Ensure adequate airflow and proper air distribution, and replace any dirty filters. A low refrigerant charge can cause inefficient operation, so check the refrigerant levels. Inspect the compressor for defects; low discharge and high suction pressure indicate it's not pumping correctly, so replace it if needed. A defective reversing valve can also cause problems by bypassing refrigerant, so consider replacing it. Compare operating pressures to the unit's pressure/temperature chart. Check the...

Summary

Model Nomenclature

Initial Inspection

Safety Warnings

Highlights critical safety precautions for installation and operation.

Moving and Storage

Mounting Vertically

Instructions for installing units in a vertical orientation.

Mounting Horizontally

Instructions for installing units in a horizontal orientation.

Hanging Bracket Kit

Installation Instructions

Step-by-step guide for installing the hanging bracket kit.

Condensate Drain

Duct System

Guidance on proper installation and insulation of ductwork.

Piping

Electrical

Covers field wiring, compliance with codes, and power supply requirements.

Thermostat Connections

Safety Devices and the UPM Controller

Safety Controls

Lists the safety features monitored by the UPM module.

Condensate Overflow Protection

Details the optional condensate overflow sensor.

UPM DIP Switch Settings

Explains the default positions for UPM DIP switches.

UPM Board Features

Describes features like anti-short cycle, random start, and low pressure bypass.

Freeze Sensor

Details the freeze sensor operation and settings.

Electronic Thermostat Installation

Thermostat Wiring

Guides on connecting thermostat wires to the unit.

Lockout Reset

Procedures for resetting unit lockouts.

UPM Sequence of Operation

Electric Heater Package Option

Water Quality

Importance of water quality for heat pump longevity.

Heat Recovery Package

Water Tank Refill

Initial Start-Up

Procedures for the initial start-up of the heat recovery system.

Sequence of Operation

Cooling Mode

Describes the unit's operation sequence during cooling.

Heating Mode

Describes the unit's operation sequence during heating.

Application Considerations

Well Water Systems

Considerations for using well water in the system.

System Checkout

Unit Start-Up

Step-by-step guide for starting up the unit.

Maintenance

Annual Checkup

Annual service recommendations by a refrigeration mechanic.

Periodic Lockouts

Causes and troubleshooting for unit lockouts.

Troubleshooting

UPM Board LED Indications

Unit Troubleshooting

Common problems, causes, and correction steps.

Unit Off On High Pressure Control

Unit Off On Low Pressure Control

Insufficient Cooling or Heating

HRP Troubleshooting

Refrigerant Pressure Ranges

Wiring Diagrams

UPM STATUS LED - BLINK CODES

Electric Heat Wiring Diagrams

Bosch EP030 Specifications

General IconGeneral
BrandBosch
ModelEP030
CategoryHeat Pump
LanguageEnglish

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