Electrical Connections - CIAT Major Line 104Y Montage-, Betriebs- Und Wartungsanweisung

Filling:
Drain the coils during commissioning.
Operating recommendation:
To prevent any inopportune opening of the thermo-actuators, the temperature of the air
surrounding the thermo-actuators should be kept at no higher than 50°C. This risk must be
taken into account, especially for units in a confined space (e.g.: units installed in a
suspended ceiling).
CIAT shall not be liable for damage to valves caused by faulty design of the hydraulic
supply network or incorrect commissioning.
To protect against the risk of condensation when using chilled water, lagging should be placed
along the entire lengths of pipes and completely sealed at its ends. When using the water coil and
electric heater, we advise against using cross-linked polyethylene (PEX) pipes to supply water to
the unit. This is because overheating of the electric heater could cause the water temperature to
rise briefly. This could cause the rapid deterioration of the PEX pipe near the unit and cause it to
burst. We recommend using stainless steel braided (or equivalent) hoses for hydraulic connections.

ELECTRICAL CONNECTIONS

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Ensure that the electrical supply is disconnected before working on the unit.
!
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Only personnel qualified to perform electrical work may carry out installation and
maintenance work.
As indicated on the data plate, the unit must be connected to a single-phase 230V power
supply (230/1/50Hz-60Hz).
The unit must be earthed. CIAT shall not be liable for incidents resulting from faulty or
non-existent earthing. Always follow the circuit diagram delivered with unit.
Circuit diagrams for customer applications should be based on the diagrams supplied:
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Unit wiring for 2-pipe or 4-pipe systems (fig. 8).
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wiring for 2-pipe configuration + Electrical with 1 or 2 resistors power P<3000 W (fig. 9).
For a P>3000 W version, please contact us.
CIAT recommends using a system that controls the unit in relation to the temperature of the
water (to actuate the valve or valves) and the electric heater.
To access the electrical terminal block:
Disconnect the unit from the electrical power supply.
Remove the casing (fig. 3) then remove the screws from the electrical box cover (fig. 10 b).
Rewiring the motor:
The Major Line has a 5-speed motor, all connected to the unit's terminal. To optimise the
performance of the unit, it is possible to adapt the 3 on-site customer speeds directly on the unit.
EN-5
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