HVAC / Heat Pumps
Wiring and Connection Manual for Viessmann Vitocal 200-A and 200-S Heat Pumps
Professional wiring and connection guide for Viessmann Vitocal 200-A (Monoblock) and 200-S (Split) heat pumps. Includes detailed circuit diagrams for compressors, EEV boards, safety chains, and sensor boards.
Quick answers from the manual
Quick answer
- This manual provides the technical wiring and connection diagrams for Viessmann Vitocal 200-A and 200-S heat pumps, intended for professional installation and service. p. 1, 8, 9, 10
Key actions
- Isolate power and wait 4 minutes before opening covers. p. 3
- Check for refrigerant leaks using a detector. p. 4
First start
- Initial commissioning must be performed by the system installer or an authorized specialist. p. 2
Where to find it in the PDF
- Compressor 400V Wiring p. 8
- Compressor 230V Wiring p. 9
- Safety Chain p. 12
- Flow Heater Wiring p. 16
Table of contents
Important Information for Professionals
This document provides the official wiring and connection plans for the Viessmann Vitocal 200-A (Monoblock) and Vitocal 200-S (Split) heat pumps. It is intended exclusively for authorized professionals. All electrical work must be performed by qualified electricians, and work on the refrigerant circuit requires certified personnel.
Safety Instructions
Electrical Safety: Before performing any work, isolate the unit from the power supply (e.g., via the main switch or fuse) and verify it is de-energized. Wait at least 4 minutes after switching off before removing covers to allow residual voltage to dissipate. Always wear appropriate personal protective equipment (PPE).
Refrigerant Safety: The system uses refrigerants (R32 or R410A). R32 forms flammable mixtures with air. Ensure adequate ventilation, especially at floor level, and remove all ignition sources from the immediate vicinity when working with R32. Use a suitable refrigerant leak detector before, during, and after work.
Wiring Diagrams Overview
The manual contains the following wiring sheets:
- Sheet 1: Compressor 400 V~
- Sheet 2: Compressor 230 V~
- Sheet 3: EEV Board (Refrigerant Circuit Controller) Vitocal 200-S
- Sheet 4: EEV Board (Refrigerant Circuit Controller) Vitocal 200-A
- Sheet 5: Safety Chain Vitocal 200-A/200-S
- Sheet 6: Main Board
- Sheet 7: Expansion Board
- Sheet 8: Controller and Sensor Board
- Sheet 10: Heating Water Flow Heater Vitocal 200-A/200-S, 400 V~
Component Identification
The wiring diagrams use standard codes for components:
- B: Pressure switch, temperature switch, thermal protection
- E: Oil sump heater, heating water flow heater
- F: Fuse, thermal relay, flow monitor
- K: Contactor, relay
- M: Motor, circulation pump, motor valve, compressor
- N: Controller
- Q: Main switch, power contactor, power relay
- Y: 4-way reversing valve
Manufacturer information
Viessmann Climate Solutions
Practical help
Common problems
Water leakage from the unit
Switch off the heating system immediately at the external disconnect (e.g., fuse box) to prevent electric shock.
Risk of electric shock during maintenance
Wait at least 4 minutes after disconnecting power before removing covers to allow voltage to dissipate.
Refrigerant leak (R32)
Ensure excellent ventilation, remove all ignition sources, and use a spark-free refrigerant detector.
Before use
- Ensure all electrical work is performed by qualified electricians.
- Verify the refrigerant circuit for leaks.
- Ensure adequate ventilation, especially at floor level.
- Check for flammable materials and ignition sources if using R32.
- Use appropriate personal protective equipment (PPE) when handling refrigerant.
- Ensure the hydraulic system is properly vented after work.
Images and diagrams
- Sheets 1-2: Detailed wiring for compressors (400V and 230V versions).
- Sheets 3-4: EEV (Electronic Expansion Valve) board connections for 200-S and 200-A models.
- Sheet 5: Safety chain wiring, including EVU lockout and flow monitor.
- Sheet 10: Wiring for the heating water flow heater.
Model compatibility
- Ensure the correct wiring sheet is used based on the specific model (200-A vs 200-S) and voltage (230V vs 400V).
- Only use original Viessmann spare parts for repairs.
Manual page author
Emily Carter
User documentation editor
Prepares concise manual descriptions and highlights the most useful setup, operation, and maintenance information for readers.