Warranty
20
DVV-Ex XS-XL 23.02.2015
2.3
Intended use
DVV-Ex fans are intended for installation in ventilation systems. They can be installed either in duct systems or as a
free sucking fan over a nozzle and a sucking side protection grid.
•
DVV-Ex fans are suitable for extraction of clean air, air with a low dust and grease content, media up to max. den-
sity of 1,3 kg/m³ and permissible moisture of max. 95 %.
•
The maximum permissible operating data on the name plate apply for an air density ρ = 1,2 kg/m³ (sea level) and a
maximum air moisture of 80 %.
•
Roof fans DVV-Ex with electric motor in explosion protection »flameproof enclosure« (Ex d) are only intended to
exhaust potentially explosive atmospheres from zones 1 or 2, field of application II, installation in zones 1, 2, or in
not explosion hazardous areas, as well as accordingly with the marking of explosion protection (gases of the
groups IIA and IIB, temperature classes T1 – T4, on request H
2
), duty type S1 - continuous operation. The fans are
classified to category 2G up to Directive 94/9 EG. They are suitable for installation outside buildings only (on roofs).
•
Media temperature and ambient temperature limits depending on the Ex-identification:
Ex-identification of the fan
(c = constructive safety)
Media temperature
Ambient temperature
Gas group, temperature
class
II 2G c IIB T4
-20 to +40°C
-20 to +40°C
IIA, IIB
T1, T2, T3, T4
II 2G c IIB T3 (-20<Ta<55°C)
-20 to +55°C
-20 to +55°C
IIA, IIB
T1, T2, T3
II 2G c IIB+H2 T3
(-20<Ta<55°C)
-20 to +55°C
-20 to +55°C
IIA, IIB, H
2
T1, T2, T3
II 2G c IIB T4 (-40<Ta<40°C)
-20 to +40°C
-40 to +40°C
IIA, IIB
T1, T2, T3, T4
Ex-identification of the con-
nection box
II 2G Ex e IIC T6…to +40°C, II 2G Ex e IIC T5…to +55°C
2.4
Improper use
Above all, the improper use means using the fan in a way other than that described. The following points are improper
and hazardous:
-
Use of a fan with improper Ex-identification (category, gas group, temperature class or ambient temperature);
-
Not suitable to exhaust dust containing meduim or medium with such dust concentration, that could affect
with dust deposits on operation and explosion protection (appropriate filtering necessary);
-
Extraction of grease containing media;
-
In case of suction aggressive atmosphere additional acid protection of exposed parts is necessary;
-
Not suitable for indoor use;
-
Operation without duct system or protective guard;
-
Operation with the air connections closed;
-
Operation without effective thermal protection (PTC).
3.
Warranty
Warranty for our products shall be determined according to the contractual agreements, our quotations and also, as a
supplement, our General terms and Conditions of Business. Warranty claims shall presuppose that the products are
correctly connected, operated and used accordingly to data sheets, and also regularly maintained.
