Electrical connection
DVV-Ex XS-XL 23.02.2015
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6.2
Preconditions for installation
•
Fans DVV-Ex must be installed on roofs.
•
The fans must be mounted on a flat, horizontal roof base (<10 mm/m) with height of min. 250 mm over the roof
top (motorshaft vertical). The base shall be accordingly designed (load capacity, stiffness, insulation, explosion pro-
tection, grounding), if not proved Systemair accessories used.
•
Installation site must be protected from dust, moisture and weather influences.
6.3
Installation
•
Ensure secure access to the fan for maintenance and service.
•
Fit the contact surface between base plate and roof base with sealing tape. Systemair roof bases (for DVV-Ex
marked with -Ex) are delivered with appropriate sealing tape.
DANGER
Explosion-protection
!
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 Appendix 1.
•
The fans shall be fixed to the base with 4 screws in the corners.
•
Avoid distortions of the casing at installation.
•
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 to Eurovent.
•
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 conductive
flexible connection between the fan and duct to avoid eventual
tensions or distortions of the base plate. The flexible connection has to comply guidelines for the
prevention of ignition hazards due to electrostatic charges (also as certified Systemair accessorie
available).
NOTE
Mounting examples with accessories are on-line available (www.systemair.com).
7.
Electrical connection
The wiring diagram is placed on the cover of connection box (inside).
NOTE
•
Motors have serial built-in PTC. More than two PTC chains may not be switched in series, as this can
lead to undefined cut-outs.
•
Maximum check voltage of PTC is 2,5 V.
•
The wiring diagrams see Appendix 2.
