HVAC / Water Heaters
Technical Data Manual for Viessmann Vitocell 100-V CVWC Hot Water Tank
Access the technical data manual for the Viessmann Vitocell 100-V CVWC domestic hot water storage tank. This guide includes detailed specifications, recovery rates, dimensions, system design guidelines, and installation requirements.
Table of contents
Manual images
Click an image to enlargeQuick Guide from the Manual
The Viessmann Vitocell 100-V CVWC is a vertical, indirect-fired domestic hot water (DHW) storage tank designed for use with modulating and low-temperature hot water heating boilers and the Vitocal 100-AW AM2V series heat pumps. This document provides technical data, dimensions, and system design guidelines. Important: This tank is not suitable for steam heating applications.
Product Overview
The Vitocell 100-V features a corrosion-resistant steel tank with a Ceraprotect enamel finish. Key design features include:
- Tubular Heat Exchanger: Extends to the bottom of the tank to heat the entire water content.
- Self-Venting/Draining Coil: Designed to prevent air locks and deposits, ensuring efficient heat transfer.
- Insulation: Highly effective HCFC-free foam to minimize standby heat loss.
- Anode Protection: Equipped with an impressed current anode for corrosion protection.
Technical Specifications
The Vitocell 100-V is available in three capacities: 53 USG (200 L), 66 USG (250 L), and 79 USG (300 L). Detailed recovery rates, draw volumes, and pressure drop charts are provided in the manual for each model based on heating water supply temperatures.
Operating Limits
- Maximum Operating Temperature (Heating System Supply): 248°F (120°C)
- Maximum Operating Temperature (Domestic Hot Water): 180°F (82°C)
- Maximum Operating Pressure: 150 psig
Installation and System Design
Proper installation is the responsibility of the heating contractor. The manual provides a conceptual system design diagram illustrating the necessary piping, including:
- Domestic hot water (DHW) supply and recirculation lines.
- Pressure and temperature relief valve (supplied with the tank).
- Shut-off valves and drain connections.
- Precharged expansion tank (required where backflow preventers are installed).
- Thermostatic mixing valve/anti-scald valve (recommended if DHW temperature exceeds 140°F/60°C).
Maintenance and Safety
To ensure warranty validity and safe operation:
- Water Quality: The tank must be used with potable water. If the water has high concentrations of chloride or sulfate, consult Viessmann for guidance.
- Sensors: Use the provided stainless steel sensor well and spring clip to ensure proper contact and heat transfer for temperature sensors.
- High Limit Device: In multiple-tank installations, it is recommended to install an additional high-limit temperature device in the common DHW supply header.
Manufacturer information
Viessmann Climate Solutions
Practical help
Common problems
Reduced heat transfer or efficiency
Ensure the system is free of air locks. The heat exchanger coil is self-venting, but proper system installation is required.
Scalding risk
If the tank temperature exceeds 140°F (60°C), ensure a tempering valve is installed to protect against scalding.
Warranty voidance
Ensure the tank is used only for potable water. Using it to heat other media or improper installation may void the warranty.
Before use
- Verify the tank is not being used for steam heating applications.
- Ensure the water to be heated is of drinking (potable) water quality.
- Check local plumbing codes for backflow preventer and expansion tank requirements.
- Install a tempering valve if the tank temperature exceeds 140°F (60°C).
- Ensure the stainless steel sensor well is used for proper sensor contact.
- Cap the recirculation tapping if the tank is not installed with a recirculation system.
Specs in practice
- Recovery Rate
- The amount of hot water the tank can produce per hour based on the heating water supply temperature.
- Standby Heat Loss
- The energy lost while the tank is holding hot water; minimized by the HCFC-free foam insulation.
- Maximum Operating Temperature
- The safe upper limit for the heating system supply (248°F) and the domestic hot water (180°F).
Images and diagrams
- Cross Section: Shows the internal components including the impressed current anode, enamel-lined shell, and heat exchanger coil.
- System Design: Illustrates the piping connections, including DHW supply, recirculation, and relief valves.
Model compatibility
- Compatible with modulating and low-temperature hot water heating boilers.
- Compatible with Vitocal 100-AW AM2V series heat pumps.
Manual page author
Michael Turner
Technical manual editor
Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.