Access To Boiler Rooms - Viessmann VITOMAX 200-HS Operating And Service Instructions

Commissioning
Installation
(cont.)
Clearances for operation and maintenance
Areas that must be accessed for control
and maintenance of the steam boiler
system must offer a head clearance of at
least 2 m and a clear width of at least
1 m. Individual boiler fittings may restrict
the clear width to 0.8 m.
In all other areas, a passage width of
0.5 m will suffice.
In the case of cylindrical boiler bodies,
the passage width on one side can be
reduced to 0.3 m.

Access to boiler rooms

The boiler room must not include instal-
lations to which personnel require
access who are not charged with work-
ing on the steam boiler system or who
might prevent the boilerman from carry-
ing out his work.
Rescue routes, emergency exits
Rapid unhindered access to and from
the steam boiler rooms must be ensured
at all times through the number, location,
type and condition of escape routes.
Escape routes must lead away from the
danger area by a short and direct route.
Exits must be identified.
Boiler rooms should have two exits
opposite each other, one of which should
be designed as an emergency exit.
Escape routes and their exit points must
have a clear width of at least 0.6 m and
a clear head height of at least 2 m; they
must always be kept free and unobstruc-
ted.
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The clearance between the boiler top
and the ceiling above must be at least
0.75 m, when access to that area is
required for operation and mainte-
nance.
All inspection apertures of the steam
boiler system must be freely accessible
or must be able to be made accessible
easily.
Unauthorised personnel must not be
given access to the steam boiler system.
Affix prohibition notices on all entries to
the boiler room so that they are clearly
legible at any time. The boiler user must
determine the authorised circle of per-
sonnel.
Doors in the way of escape routes must
be able to be opened easily from the
inside and must open in the direction of
escape.
The boiler room must be able to be ade-
quately ventilated. For this, openings
must be provided at suitable points. If the
combustion air is drawn from the boiler
room, ensure that the boiler room is
never subjected to more than 0.5 mbar
negative pressure.