Galletti LCE 244 HQ Инструкция по эксплуатации онлайн [18/64] 463243

LCE

RG66004766_rev.05

The above operating conditions must always be complied with: failure to ensure said

conditions will result in the immediate invalidation of the warranty.

The electrical connections must be made in accordance with the information shown in the wiring diagram

provided with the unit and current regulations.

Electrical connections and preliminary checks:

 Put on the main switch, turn the ½-turn locking screws of the electric enclosure and open it.

 Introduce the power cable 400/3/50+N through the hole provided on the left side of the unit (after first

removing and making a hole in the aluminium square based on the diameter of the electric cable) and

secure it with a cable gland.

 Connect the power supply and earthing wire to the terminals of the main switch.

 Open the fuse carriers F1 and F2 (or Q1 and Q2 for the motor overload cutouts) of the compressors (F1-

F2-F3-F4 for the fuses or Q1-Q2-Q3-Q4 for the overload cutouts in the case of LCE 4 compressor models)

to prevent them from starting up in the wrong direction in the event of an incorrect phase sequence.

 Switch on the power supply by turning the main switch (QS) to ON.

 Verify whether the phase sequence R-S-T is correct by checking, on the phase sequence relay situated in

the middle of the electric control board, that the green power on LED and yellow LED indicating the correct

sequence both light up; if this does not occur, disconnect the chiller power supply from the external

distribution panel and swap over two phases; then repeat the operation. IN NO CASE SHOULD YOU

TAMPER WITH THE WIRING DOWNSTREAM FROM THE MAIN SWITCH since this may alter the correct

sequence of other devices, e.g. pump(s).

 Close the fuse carriers F1 and F2 of the compressors (F1-F2-F3-F4 in the case of LCE 4 compressor

models).

 Close the electrical control board and lock it by means of the ½ - turn locks.

An earth connection is required by law. The installer must connect the earthing wire using the earthing

terminal situated on the electric control board (yellow and green wire).

The power supply to the control circuit is shunted from the power line through an insulating transformer

situated on the electric control board.

The control circuit is protected by suitable fuses.

A standard

feature of all units is a phase sequence relay that verifies the correct phase sequence; this is

necessary to ensure that the chiller is completely functional before enabling a compressor start-up.

6.2 FLOW SWITCH ON THE WATER SIDE

All the LCE units are fitted with a blade-type flow switch to protect the evaporator as a standard. This is

installed in series with the water and electrical circuits and wired.

6.3 ELECTRIC CONNECTIONS OF THE CIRCULATION PUMP

If selected when placing the order, the pump kits are supplied pre-wired with all LCE units. For dual

pump kits, whether set up according to an “AND” or “OR” logic, rotation is controlled on a time basis and

triggered in the event of a fault.

The pump must be started before the chiller and stopped after the latter (minimum

recommended delay: 60 seconds). If included as an option, this function is already

performed by the microprocessor on the unit.