Viessmann Vitopend 100-W Installation And Service Instructions For Contractors

47
Gas combi boiler
If the flow switch detects that DHW is
being drawn (> 3 l/min), the burner and
circulation pump start and the 3-way
valve changes over to DHW heating.
The burner modulates to reach the DHW
outlet temperature. It is limited on the
boiler side by the temperature limiter
(84 °C).
Extension for external connections (accessory)
The external extension H3 can be con-
nected to the Vitopend 100-W control
unit.
Installation instructions
External extension H3
With the external extension H3, extractor
fans can be locked out in the case of
open flue operation.
Function description
DHW heating
(cont.)
5848 649 GB
Service

Viessmann Vitopend 100-W Specifications

General

Fuel Type	Gas
Max. Water Temperature	85 °C
Type	Condensing Boiler
Gas Type	Natural gas / LPG
Efficiency	Up to 98%