7
2-Stage, Three-Phase Controller
1.96
With Timing Switch and Room Temperature Controller, Type 30277
Operating instructions
3.3 Electrical Connection
Safety Information
The electrical installation of this product requires special skills in electrical
engineering. These skills are usually taught during vocational training in the
indicated professions and are not described separately here. The following
safety information has to be checked and observed before any work may
be carried out on the controller and the devices:
G
De-energise the equipment and ensure that no unauthorised restart can
occur.
G
Wire the unit in accordance with the enclosed wiring diagrams.
G
Wire the unit in accordance with current German Association of
Electricians (VDE) and EN guidelines as well as the connection
requirements (TAB) of the regional power supply companies.
G
The unit should only be wired using fixed cables.
Important!
Incorrectly connected products may become damaged! The
manufacturer will not be held liable for injuries and material damage
caused if the device has been wrongly connected and/or incorrectly used!
Wiring
G
Remove the terminal covers (figure 3); see P.5 above too)
G
Make all connections in accordance with the enclosed wiring diagram.
Parallel operation of several units
If the following information is observed several heating units can be
operated in parallel with a single 2-stage controller type 30277:
G
Parallel operation is only possible with units which have the same motor
circuit diagrams (types ending in the number 36/38). Their electrical
power consumptions may differ.
G
The total cable length of 250 m to the air heaters must not be
exceeded.
G
The maximum current carrying capacity of the controller must not be
exceeded (see the technical data)..
G
Connect all motor windings in parallel (see wiring diagram).
G
Connect all thermal contacts for all motors in series (see wiring diagram).
Fig. 3: Opening the unit
2-Stage, Three-Phase Controller
1.96
With Timing Switch and Room Temperature Controller, Type 30277
Содержание 30277
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