IMO PRF, PRF EX 009 312436

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| Electrical connection
10.1 Installation positions
The installation is possible in any mounting position.
10.2 Lightning protection device
♦ If the risk assessment shows that there is the risk of an atmospheric discharge, lightning protection measures must
be taken. For reasons of operational safety, provide for a suitable lightning protection system according to country
specific directives (e.g. DIN VDE 0185).
11 Electrical connection
Safety information
Danger
Risk of ignition of a potentially explosive gas/air atmosphere!
If the wire ends which have not been connected are fitted to the external current circuits within an area
with a potentially explosive atmosphere,
♦ a connection box (with its own certification and explosion-protection identification) which has been
selected as suitable for this area must be used.
♦ the electrical data, information on temperature monitoring and on admissible operation with part voltage,
if applicable, can be found on the relevant data sheet.
♦ Electronic accessories without explosion-protection (e.g. RTRD control device and UEK motor protection)
must be installed outside the explosion capable area.
♦ Speed control by frequency converter is only admissible for devices with the „Pressure-proof
encapsulation Ex d“ ignition protection class.
The types #33985 PRF-EX 180D4 and #34532 PRF-EX 125D2 are not speed controllable by frequency
converter.
Protection against explosions in general:
♦ Earth at the planned earthing point.
♦ In hazardous areas connect conductive components to a potential equalisation system.
Warning: Danger from electrical voltage!
♦ Observe the 5 rules of electrical safety, see 3.3 5 rules of electrical safety, page 3.
♦ Prevent the ingress of water into the connection box.
♦ Electrical connection may only be carried out by adequately qualified persons, details see Table 1 Qualifications, page
3.
Connection
♦ Check if the data on the nameplate matches the
connection data.
♦ Complete the electrical connection according to the
circuit diagram.
♦ Use all of the locking screws.
♦ Insert the screws by hand to avoid damaging the
thread.
♦ Tighten all glands well in order to guarantee
protection class IP.
♦ Screw the lid of the terminal box/inspection switch
evenly tight.
♦ Connect the cable end in a dry environment.
♦ Install a circuit breaker in the permanent electrical
installation, with a contact opening of at least 3 mm
at each pole.
♦ Potentially, the fans may become charged with static
electricity. If this represents a risk, please contact
Systemair.
Protective grounding wire
The protective grounding must have a cross-section equal to or greater than that of the phase conductor.
Residual current circuit breaker
All-current-sensitive residual current circuit breakers are required for use in alternating-current systems with 50/60
Hz, in combination with electronic devices such as EC motors, frequency converters or uninterruptible power supplies
(UPS).
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