IMO DVG30 03 2017 Am 10 05 2017
Installation
DVG 30.03.2017 9
CAUTION
Danger from cutting edges!
At installation works wear protective working gloves.
6.2 Preconditions for installation
DVG fans must be installed on roofs, outside fire zone (DVG/F for exhausting from fire zone).
The fans must be mounted on a flat, horizontal roof base (<10 mm/m) with height of min. 250 mm over the rooftop
(motor shaft vertical). The base shall be accordingly designed (load capacity, stiffness, insulation), if not proved Sys-
temair accessories used. Extremely wind or turbulence exposed places should be avoided in order to prevent any
water droplets ingress under extreme weather conditions. Use DVG-V outlets to reduce this danger.
During installation the site must be protected from dust, moisture and weather influences.
6.3 Installation
Ensure secure access to the fan for maintenance and service.
Mounting of service switch and vertical outlets (DVG-V) up to Appendix 1. Installation examples up to Appendix
5/6.
Fit the contact surface between base plate and roof base with temperature resistant sealing tape for DVG/F or
foam sealing tape for DVG/120, DVG-T. Systemair roof bases (for smoke extract fans marked with /F) are delivered
with appropriate sealing tape.
WARNING
Hazard from mechanical distortions!
Before and after mounting check manually if the impeller rotates smoothly. Install the fan only, if the
minimum air gap between rotor and nozzle matches the value from the test protocol.
Avoid distortions of the casing at installation.
The fans shall be fixed to the base with 4 screws in the corners.
Ensure unobstructed and uniform intake into the fan as well as free outlet.
Install connecting ducts and accessories. The suction side of the fan is provided with a connection for flange-type
mounting of the air duct (according EUROVENT at sizes 560 to 800), dimensions see www.systemair.com.
Provide for contact/suction protection and safety distances according to EN ISO 13857.
NOTE
In some cases, it is better to mount accessories before placing the fan on the roof base.
NOTE
It is recommended to install a flexible connection between the fan and duct to avoid eventual tensions or
distortions of the base plate (for F400 only: appropriate flexible connection should take eventual thermal
extension of connecting parts. Flexible connection has to comply temperature/time class of the fan
(400°C/2h); also as certified Systemair accessory available).
NOTE
It is recommended to keep sufficient ventilation rate to avoid condensation in cold corners of the roof
base under certain weather conditions or to insulate any heat bridge in case of low ventilated buildings.
NOTE
Data of accessories are on-line available - www.systemair.com.