Bosch/Buderus Heat Pump: Manuals & Links

Here you will find operating manuals, installation manuals, technical documents, and the joint service manual for the Bosch Compress 5800i/6800i and Buderus Logatherm WLW176i/186i heat pumps.

General

Books

Energy-saving commissioner Carsten Herbert
Alles, was Sie über Wärmepumpen wissen müssen
An easy-to-understand introduction to the operation, planning, costs, and efficient operation of heat pumps for non-specialists and aspiring professionals. Written in a friendly and engaging style, like all of Carsten Herbert’s works.

Videos

Energy-saving commissioner Carsten Herbert
Sizing heat pumps – What you absolutely need to pay attention to!: Entertaining information on sizing heat pumps.

Bosch Compress 5800i/6800i AW

Installation manuals

In addition to assembly and connection information, the manuals for the outdoor units also contain detailed technical tables, including heating output, COP, and sound power according to EN 14511 and EN 12102.

Outdoor units AW 4–7: Output sizes 4, 5, and 7 kW
Outdoor units AW 10/12 OR-T: Output sizes 10 and 12 kW
Compress 6800i AW AWM: floor-standing indoor unit with domestic hot water tank
Compress 6800i AW AWE: wall-mounted indoor unit
Compress 5800i/6800i AW 12 MB: indoor unit with buffer tank
UI 800.2 AW: control unit
UI 800.2 AW NF47.12: control unit, newer function status

Operating manuals

Buderus Logatherm WLW176i/186i

The Logatherm WLW176i/186i are the technical sister models of the Bosch Compress 5800i/6800i AW.

Installation manuals

The Buderus outdoor unit manuals also contain the technical classifications and measurement values for COP, heating output, and sound.

Logatherm WLW MB 4–7 AR: Output sizes 4, 5, and 7 kW
Logatherm WLW MB 10–12 AR: Output sizes 10 and 12 kW
Logatherm WLW176i-12 T180: indoor unit with domestic hot water tank
Logatherm WLW176i-12 E: wall-mounted indoor unit
Logatherm WLW176i-12 TP70: indoor unit with buffer tank
Logatherm WLW186i-12 TP70: indoor unit with buffer tank
BC400.2 AW: control unit
BC400.2 AW NF47.12: control unit, newer function status

Operating manuals

Service and troubleshooting

Service manual Compress 5800i/6800i AW and Logatherm WLW176i/186i: joint service manual for both brands, including error codes, diagnostic data, and work instructions
Bosch error code search: Search for error codes

The service manual is intended for qualified professionals. In particular, work on the refrigerant circuit of the R290 units may only be carried out with the appropriate training and equipment.

Further official sources

Technical documentation from Bosch: Search by product or document number
Technical documentation from Buderus: Search by product or document number

Further content

Variants, output, and COP: Output sizes, technical parameters, and differences between the unit variants
Heating curve, domestic hot water, and other settings: Important settings for comfortable and efficient operation
Optimizing efficiency and consumption: Practical advice from ongoing operation
Common errors and troubleshooting: Known error patterns, causes, and solutions
Software versions and firmware statuses: Overview of known software statuses
Technical design of the heat pump: Refrigerant circuit, primary circuit, and heating circuit explained clearly

Forums

Community contributions are particularly helpful for practical questions, optimization, and typical error patterns. However, always compare technical statements with the current manufacturer’s documentation.

About this collection

The documents were selected based on their relevance for operators and professionals. Where possible, official manufacturer documents are linked. Nevertheless, always check the model designation and revision status before use, as menus, connections, and technical data may change.

Last checked: August 2026

Affiliate notice: The link to the book is an affiliate link. If you make a purchase, I may receive a commission. There are no additional costs for you.