IMO DVV

Warranty
6 DVV 16.08.2021
2.2.3 Personnel for operation/use, maintenance and cleaning
 Operation/use, maintenance and cleaning may only be carried out by trained and authorized personnel. The oper-
ating personnel must have appropriate knowledge about handling with the fan. In the case of a malfunction or an
emergency, they must react correctly and adequately.
2.3 Intended use
DVV/DVVI (I = sound insulated) fans are intended for installation in ventilation systems, outside buildings only (on
roofs). They may be installed either in duct systems or as a free sucking fan over a nozzle and a sucking side protection
grid.
 DVV/DVVI fans are suitable for extraction of clean air, air with a low dust and grease content, media up to max.
density 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 %.
 Daily ventilation of medium -20 up to 120°C, continuous operation. On request motors can be equipped with elec-
tric heaters to meet lower temperatures.
 Smoke and heat extract roof fans DVV, DVVI/F400 respectively F600 are intended to exhaust hot gases up to
400°C/120 min (F400/120, F400/90, F300, F200) respectively up to 600°C/120 min. They are designed for use in
powered smoke and heat exhaust ventilating systems in the event of fire, and ventilating in normal conditions (dual
use). Ventilated areas and emergency exits contribute to easier evacuation of people and equipment in the event
of fire, and to faster and more efficient fire extinguishing; they protect the building structure and equipment
against excessive temperatures and decrease fire escalation to the surrounding areas. Snow load classification: SL
0, suitable for installation only on the top of heated buildings, considering possible heat transfer. With FSL acces-
sory installation on top of non-heated buildings up to snow load class SL 1000 is allowed. In case of fire all motor
protective devices and controls must be bridged to guarantee functional capability (connection direct to mains).
 Versions DVV-T and DVV/120 shall be used for common daily ventilation only, not to be used for smoke extraction.
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 identification (temperature/time class in case of smoke extraction);
- Not suitable to exhaust dust containing medium 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;
- The fans DVV/F400, /F600, -T, /120 are not intended to exhaust from explosion hazardous zones;
- 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 (intake protection);
- 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, as a sup-
plement, our General terms and Conditions of Business. Warranty claims shall presuppose that the products are cor-
rectly connected, operated and used accordingly to data sheets, and regularly maintained.