Carrier 09VE, Installation, Operation And Maintenance Instructions

9 - CONNECTIONS

9.1 - Electrical connection

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All wiring must be connected in accordance with the regulations that apply to the installation site (e.g. NF C 15100 in France).

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In all cases, refer to the "ELECTRICAL CONNECTION" document or wiring diagram attached to the unit.

■ Follow the electrical supply specifications indicated on the data plate.

■ The phase unbalance must not exceed ±2% for voltage.

■ For  units  without  wiring  or  with  an  electrics  box  option,  the  motors  are  partitioned  in  pairs:  M1+M2  –  M3+M4  -  …

The motors must be controlled by stage in a single partition.

If any of the above requirements are not met, immediately contact your energy supplier and make sure the unit is not switched on until 

the necessary corrective actions have been taken. Failure to do so will automatically void the warranty.

It is your responsibility to protect the unit from mains voltage spikes and voltage spikes caused by lightning. Depending on 

the geographic location and the type of mains network (buried or overhead), local regulations may require that a lightning rod 

be installed. Failure to comply with the requirements of standards in force in the country of installation  

(e.g. NF C 15100 in France) will void the warranty.

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Before connecting, make sure that the power supply cable is disconnected.

The terminal boxes on the motors for units without the terminal box or electrical cabinet option must be directly connected taking all 

the necessary precautions in order to avoid: 

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electrical connection errors which can damage the motors or impair performance

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water ingress in the terminal boxes (e.g. if the cover is not closed properly) which damages the motors

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people falling from a height when making electrical connections for units installed high up

9.2 - Fluid connection

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Never introduce foreign bodies into the circuit.

■ The connection pipes and the regulation or insulation equipment must be set up and supported so as to ensure they do not exert 

any force on the coil piping (pressure, torsion or flexion). It is recommended to use flexible connectors on the connections to prevent 

water hammer.

■ Positioning of pipes: connect all piping on the unit (see dimensional drawing)

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If brazed/welded connections are used, take appropriate precautions to ensure that welding residues do not enter the circuit.

9.3 - Connecting a speed regulator

■ A regulator must be commissioned by a specialist, as an incorrect choice/configuration could cause electromagnetic interference and 

damage to the motors. Minimum precautions:

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Use a shielded cable upstream and downstream of the regulator.

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The frequency must be between 25 and 50 Hz.

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Fit a DU/DT filter between the speed regulator and the fans.

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