Draining/Frost Protection; Minimum Clearances - Viessmann Vitogas 100 Service Instructions Manual

Draining/frost protection

A

Minimum clearances

For draining the boiler completely
(e.g. when there is a risk of frost)
also drain the l.h. boiler section
via drain valve A on the side of
the boiler.
Maintain a distance between the
flue pipe and the surface of the
thermal insulation (also of
accessories) of at least 20 mm.
This safeguards that the surface
temperature of the thermal
insulation never exceeds 85 ºC
at rated output.
Appendix
19