Assembly; Safety Information; Prerequisites; Order Of Assembly - SystemAir PRF 125D2 Betriebsanleitung

8

Assembly

8.1

Safety information

•
Assembly may only be done by trained qualifi ed personnel paying attention to the relevant directives. A fundamen-
tal understanding and skills in dealing with ventilation systems is a prerequisite.
•
In assembly, comply with the system-related conditions and the requirements of the system manufacturer or plant
builder.
• The fan housing may not be deformed during assembly.
• Provide the generally prescribed electrical and mechanical protective devices.
8.2

Prerequisites

 Only install the fan when and if
–
the fan has not been damaged,
–
the fan wheel runs freely when turned by hand,
–
the distance between the impeller and the tip is constant
–
it has been protected against dust, moisture and the infl uences of the weather
–
if the minimum air gap between the blade tip and the housing in EX fans matches the value stated under point
8.2.1.
 Pay attention to the direction of fl ow (arrows).
 For maintenance and repair, ensure secure access to the fan.
 Provide for contact, intake protection and safety distances according to DIN EN 294 and DIN 24167-1.
 Ensure uninhibited and even admission into the device and free blow-out.
 In EX fans, the blade angle may not be amended subsequently.
8.2.1 Minimum air gap
Construction size 125: minimum air gap 2.0 mm
Construction size 160: minimum air gap 2.5 mm
Construction size 180: minimum air gap 3.0 mm
8.2.2 Additional prerequisites for PRF-EX types
 Seal the system carefully.
 Install accessory parts correctly.
Upstream or downstream components or those located directly in the air fl ow may not manifest any
unprotected aluminium or steel surfaces. Varnishing or a plastic coating fulfi lling at least grid section
characteristic 2 according to DIN EN ISO 2409 is necessary, in order to prevent an alumino-thermal
reaction.
8.3

Order of assembly

WARNING
Risk of injury from electrical energy and rotating parts
»
Keep to the following order in order to rule out the risk of injuries from electrical energy and rotating
parts:
1. Put the fan into its fi nal position.
2. Install the fan.
3. Produce the electrical connection.
Fan types PRF and PRF EX - 10.2013
Construction size 200: minimum air gap 3.5 mm
Construction size 250: minimum air gap 4.5 mm
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