5366 018 GB
4/2012
Dispose after installation.
Installation instructions
for contractors
VIESMANN
Cylinder demand terminal box
for the Vitodens 100-W
Safety instructions
Please follow these safety instructions closely to prevent accidents and
material losses.
Installation, initial start-up, inspection,
maintenance and repairs must only be
carried out by a competent person (heat-
ing engineer/installation contractor).
Before working on the equipment/heat-
ing system, isolate the power supply
(e.g. by removing a separate mains fuse
or by means of a mains isolator) and
safeguard against unauthorised recon-
nection.
When using gas as fuel, also close the
main gas shut-off valve and safeguard
against unauthorised reopening.
Repairing components which fulfil a
safety function can compromise the safe
operation of your heating system.
For replacements, use only original
spare parts supplied or approved by
Viessmann.
Function
The heat demand issued by the cylinder
thermostat is transferred via the terminal
box to the boiler control unit.
