Electrical Connection; Notes For Connecting Cables To The Unit - Pfannenberg DTT 6801 Serie Betriebsanleitung

ENG
4.6

Electrical connection

DANGER
Danger of fatal injury due to electric shock!
Parts may be under voltage when the unit is opened and can cause an electric shock if touched.
Observe the following points when working on the open unit:
• Work on the electrical system may only be carried out by authorized electricians.
• Before commencing work on the electrical system, switch off the power supply, check that no voltage is applied and
secure against being switched back on.
• Cordon off the working area and post a warning sign.
• The electrical connection must be made according to nationally valid regulations.
ATTENTION
Unit malfunction
Unit malfunction due to wrong field of rotation in the mains connection and due to high-frequency interferences (EMC
interferences).
• Make sure that the unit is connected to a three-phase network with right-hand field of rotation.
• Always check the field of rotation before commissioning the unit!
• Interfering electrical installations (high-frequency) must be avoided.
• Signal cables must be laid separately from power cables.
ATTENTION
Wrong connection voltage!
Wrong connection voltages can damage component parts.
• Compare the connection voltage with the unit type plate. Necessary protection according to section "Electrical data",
Page 25.
4.6.1

Notes for connecting cables to the unit

Note the following points when connecting the lines to the unit:
• All cables must be supported by a suitable strain relief.
• Maximum cable cross-section 2.5 mm² (AWG 14).
• Stripped length of the cable wires: 8 ... 9 mm.
• Observe the connection assignment according to the circuit diagram.
Operating Manual | Roof-mounted Cooling Unit | Standard Controller (SC) – 400 / 460 V, 3~ | 086100040b 38/39