Connecting to a fresh-air system
The fresh-air laboratory heating oven must be connected to a
fresh-air supply
. The connection
must be sealed (nom. Ø of the flange: 100). The connector piece on the unit must not be
subjected to any mechanical stresses. The flange-fitted fresh-air supply line must be free of
tension, thrust, distortion and bends.
The
length
of the connected fresh-air supply line must not exceed
5 m
. The fresh air may be
passed through an
air intake filter
(approved accessory), which removes any
dust particles
.
The fresh-air supply must originate in a neutral area which is not subject to explosion
hazards and must not contain any solvent vapor.
The possible working temperatures are directly dependent on the temperature of the supplied air.
The unit has precisely defined heating capacity reserves at its disposal for reasons related to
explosion protection. Under unfavorable conditions (fresh-air temperatures < 20 °C), it is possible
that the maximum settable working temperature will not be reached in the inner chamber (if the
fresh-air supply is taken from outside and is subject to large fluctuations in temperature). Please
check whether the required fresh-air supply can therefore be taken from a temperature-equalized
neutral area (e.g. adjacent rooms ...) before connecting up.
The
temperature of the supplied air
should be within the
range of >20 °C to 30 °C
,
but
should not exceed 40°.
Connecting to an extraction system
Comply with the applicable national environmental regulations for the extraction of
exhaust gases released during the heat treatment. Suitable measures must be
implemented to ensure that such gases are safely led directly outside without
Thermal or catalytic treatment of flue gases may prove to be suitable measures in this
respect.
All
flue ducts
must be made of
fireproof materials and must be sealed
.
A
draft breaker
must be used to
connect
the unit to the extraction system, as the planned
ventilation concept for the heating oven may otherwise be detrimentally affected.
Flow monitors
must be used to monitor the
exhaust gas / air flow volume
of the extraction
system. A
problem
in the flow of exhaust gases must cause an
alarm signal
to be given.
It must not be possible
to start a heat treatment process involving combustible solvents
when
the ventilation system is switched off or defective
(e.g. organizational measures, operating
instructions ...).
Use the draft breaker to adjust the air flow volume in such a way that exhaust gases can be
extracted reliably
without
producing any
eddying
at the unit's exhaust-gas connector. (Air speed
of the exhaust air flow volume
≅
air speed of the unit's exhaust air).
The
exhaust air/gases from the unit
must
never
come into contact with
combustion exhaust
gases
.
The
exhaust-air blower
to be provided on site
must be capable of handling potentially
Apertures must be provided to enable the removal of residue and condensate. The flue ducts
must be thermally insulated (recommendation: half-shell sleeves made of laminated mineral
fiber).
The type of flue duct or the arrangement must be such as to
prevent
any
condensate
produced
in the flue duct from
flowing back
into the
unit
.
2.
SETUP AND INSTALLATION
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explosive vapor/air mixtures.
endangering individuals.
