Viessmann Vitodens 100-W B1HA 94 User Manual

Installation and Service
Instructions
VITODENS 100-W
5784 568 - 18 04/2020
for use by heating contractor
Vitodens 100-W B1HA/B1KA
Models 26 to 125
Wall-Mounted, gas-fired condensing boilers
On demand domestic hot water with Combi boiler
Read and save these instructions
for future reference.
IMPORTANT
Please file in Service Binder
Heating input: 21 to 125 MBH
6.2 to 36.6 kW
H

Viessmann Vitodens 100-W B1HA 94 Specifications

General

Model	Vitodens 100-W B1HA 94
Category	Boiler
Efficiency	Up to 95% AFUE
Weight	84 lbs
Vent Type	Direct vent
Fuel Type	Natural Gas or Propane
Type	Wall-mounted
Max. Flow Temperature	167°F (75°C)

Summary

Installation and Service Instructions

Safety and Regulatory Requirements

Installation and Documentation

Emphasizes licensed professionals and the importance of product documentation for installation.

Operational Safety Precautions

Covers carbon monoxide, fresh air, and equipment venting safety requirements.

Important Regulatory Requirements

Codes and Standards Compliance

Mechanical Room Installation

Dimensions and Clearances

Boiler Mounting

Boiler Connections

Vent and Gas Connections

Safety Connections

Pressure Relief and Low Water Cut-off

Installation Examples

Electrical Connections

Start-up, Inspection, and Maintenance

System Filling and Bleeding

Provides step-by-step instructions for filling and bleeding the heating system.

Gas Type and Pressure Checks

Gas Type Selection and Conversion

Static and Running Pressure Measurement

Details procedures for measuring gas static and running pressures.

Combustion Analysis

CO2 and Relay Test Procedures

Explains how to check CO2 levels and perform relay tests for burner output.

Troubleshooting

Diagnosis and Corrective Measures

Outlines the process for identifying faults and performing corrective actions.

Fault Code Reference

Faults with Control Unit Display

Lists common fault codes displayed on the control unit and their remedies.

Boiler Component Checks

Temperature Sensor and Fixed High Limit Tests

Outdoor Sensor and Heating Curve

Outdoor Temperature Sensor Test

Lighting and Operating Instructions

Safety Before Operating

Provides critical safety warnings and immediate actions for gas leaks or appliance issues.