Daikin LREQ-BY1 Installation Manual Download

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Installation manual

LREQ5~20B7Y1

Air cooled refrigeration condensing unit

4PW74302-1D – 2016.11

• If small animals might enter the unit, block off any gaps (hatching

parts) with material (field supply).

7-3 Procedure for power supply wiring

Procedure for Power Supply Wiring

Power supply (3 phase 50 Hz 380~415)

Overcurrent circuit breaker (earth leakage circuit breaker) all pole
disconnection switch

Earth wire

Power supply terminal block

Mount insulation sleeves

Fix the power supply wiring for phases L1, L2, L3, and N,
respectively, with the provided clamp (1) to the resin clamp.

Fix the earth wire to the power supply wire (phase N) with the
provided clamp (1).

Earth wire

Perform wiring so that the earth wire will not come in contact with
lead wires of the compressor. Otherwise, noise generated may
have a bad influence on other equipment.

Earth terminal

• When two wires are connected to a single terminal, connect

them so that the rear sides of the crimp contacts face each
other.

• Also, make sure the thinner wire is on top, securing the two wires

simultaneously to the resin hook using the accessory clamp (1).

Power circuit, safety device, and cable requirements

• A power circuit (see the following table) must be provided for

connection of the unit. This circuit must be protected with the
required safety devices, i.e. a main switch, a slow blow fuse on
each phase and an earth leakage circuit breaker.

• When using residual current operated circuit breakers, be sure to

use a high-speed type (1 second or less) 200 mA rated residual
operating current.

• Use copper conductors only.
• Use insulated wire for the power cord.
• Select the power supply cable type and size in accordance with

relevant local and national regulations.

• Specifications for local wiring are in compliance with IEC60245.
• Use wire type H05VV when protected pipes are used.
• Use wire type H07RN-F when protected pipes are not used.

Point for attention regarding quality of the public electric power
supply

This equipment complies with respectively:

• EN/IEC61000-3-11

(1)

provided that the system impedance Z

sys

less than or equal to Z

max

and

• EN/IEC61000-3-12

(2)

provided that the short-circuit power S

greater than or equal to the minimum S

value

at the interface point between the user’s supply and the public system.
It is the responsibility of the installer or user of the equipment to
ensure. by consultation with the distribution network operator if
necessary, that the equipment is connected only to a supply with
respectively:

• Z

sys

less than or equal to Z

max

and

• S

greater than or equal to the minimum S

value.

(1)

European/International Technical Standard setting the limits for
voltage changes, voltage fluctuations and flicker in public
low-voltage supply systems for equipment with rated current
≤75 A

(2)

European/International Technical Standard setting the limits for
harmonic currents produced by equipment connected to public
low-voltage systems with input current >16 A and ≤75 A per
phase.

Warning, alarm, and operation output wiring connections

• Connect warning, alarm, and operation output wiring to the X2M

terminal block and clamp as indicated by the following diagram:

X2M wire specifications

Note: Be sure to insulate the connecting equipment.

• Refer to the

"7-1 Example of wiring entire system" on page 12

all means when connecting the operation output wiring.

A compressor failure may result if the operating output wiring is not
connected.

Knockout hole
(For low-voltage wiring)

Knockout hole
(For high-voltage wiring)

Burr