FDL (E2) 03/2011
page 17/68
1.9.5 Drying impregnating resins
When using the safety / paint drying oven FDL to dry impregnating resins, the operator is allowed to in-
crease the highest permissible amount of solvent specified for surface drying (chap. 2.3) by up to 20
times (see GUV-R 500 chap. 2.28 „Betreiben von Trocknern für Beschichtungsstoffe“ ("Dryers for coating
materials") no. 3.7.4 or EN 1539:2009, Appendix A.1.1.2).
2.
Unit description
The safety / paint drying oven FDL 115 was built according to EN 1539:2009 (“Dryers and ovens, in
which flammable substances are released. Safety requirements”).
The fan in the rear of the safety / paint drying oven delivers a constant amount of fresh air through the
working area irrespective of the drying temperature. A large-area filter removes dust from the incoming
air (permeability up to approx. 1 micrometer).
A flow monitor in the upper part of the device (pressure differential switch) monitors the stream of exhaust
air. In the event of failure, the monitoring system turns the heater off immediately and registers this status
with a visual and an audible signal. The heating of the device is released with a time delay of 4 minutes
after you turn on the device by its main power switch.
The indicator light (3) in the operating panel only lights up as long as the air-flow monitor has not yet en-
abled the heating process. The drying temperature is also monitored constantly by the temperature limiter
(2). If the temperature would exceed the maximum permissible temperature, the heating is turned off
immediately and this state is indicated visually by indicator light (2a) and acoustically. In the event of fail-
ure, the safety / paint drying oven cannot be restarted until the RESET key (2b) or (4) has been reset
BINDER safety / paint drying ovens with forced convection FDL are equipped with the electronic program
controller RD3 with digital display. This permits programming of temperature cycles.
The APT.line™ preheating chamber system ensures high level of spatial and time-based temperature
precision, thanks to the direct and distributed air circulation into the interior. The air turbine supports ex-
act attainment and maintenance of the required temperature accuracy.
All functions of the multifunctional program control can be set simply and conveniently via the easy to
understand function keypad of the RD3 temperature program controller. This controller is equipped with
touch function keys and a digital display and permits exact temperature setting and programming tem-
perature cycles. The FDL provides almost unlimited possibilities of adapting to individual customer re-
quirements based upon extensive programming options and on the week program timer and real time
clock of the controller.
All unit functions are easy and comfortable to use thanks to their clear arrangement. Major features are
easy cleaning of all unit parts and avoidance of undesired contamination.
The inner chamber, the pre-heating chamber and the interior side of the doors are all made of stainless
steel (material no. 1.4301 (V2A) in Germany, US equivalent 304). When operating the chamber at tem-
peratures above 150 °C, the impact of the oxygen in the air may cause discoloration of the metallic sur-
faces (yellowish-brown or blue) by natural oxidation processes. These colorations are harmless and will
in no way impair the function or quality of the unit. The housing is RAL 7035 powder-coated. All corners
and edges are also completely coated.
The safety / paint drying oven FDL comes equipped with a serial interface RS 422 for computer commu-
nication, e.g. via the communication software APT-COM™ 3 DataControlSystem (option, chap. 13.1). For
further options, see chap. 17.4.
The units can be operated at an ambient temperature of 18 °C /
64.4 °F
up to 40 °C /
104 °F
in a tem-
perature control range by 5 °C above ambient temperature up to +300 °C /
572 °F
.
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