Daikin LREQ5B7Y1, Installation Manual

Page: 15 / 24

LREQ5~20B7Y1
Air cooled refrigeration condensing unit
4PW74302-1 – 2012.06
Installation manual
12
7-3 Procedure for power supply wiring
Procedure for Power Supply Wiring
1 Power supply (3 phase 50 Hz 380~415)
2 Overcurrent circuit breaker (earth leakage circuit breaker) all pole
disconnection switch
3 Earth wire
4 Power supply terminal block
5 Mount insulation sleeves
6 Fix the power supply wiring for phases L1, L2, L3, and N,
respectively, with the provided clamp (1) to the resin clamp.
7 Fix the earth wire to the power supply wire (phase N) with the
provided clamp (1).
8 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.
9 Earth terminal
10 • 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
is
less than or equal to Z
max
and

EN/IEC61000-3-12
(2)
provided that the short-circuit power S
sc
is
greater than or equal to the minimum S
sc
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
sc
greater than or equal to the minimum S
sc
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 11 by
all means when connecting the operation output wiring.
A compressor failure may result if the operating output wiring is not
connected.
N L 1 L 2 L 3
B
1
2
3
4
5
6
7
9
10
8
Terminal block Crip style terminal
Wire: narrow
Clamp (1)
Wire: thick
Resin hook
Phase and
frequency
Voltage
Minimum
circuit amp.
Recommended
fuses
LREQ5 3~ 50Hz 380-415V 12.8A 15A
LREQ6 3~ 50Hz 380-415V 13.7A 15A
LREQ8 3~ 50Hz 380-415V 19.3A 25A
LREQ10 3~ 50Hz 380-415V 22.0A 25A
LREQ12 3~ 50Hz 380-415V 24.0A 25A
LREQ15 3~ 50Hz 380-415V 31.4A 40A
LREQ20 3~ 50Hz 380-415V 35.0A 40A
Z
max
( Ω ) minimum S
sc
value
LREQ5 – –
LREQ6 – –
LREQ8 0.27 655 kVA
LREQ10 0.27 899 kVA
LREQ12 0.27 1097 kVA
LREQ15 0.24 761 kVA
LREQ20 0.24 945 kVA
Electric wire thickness 0.75~1.25 mm
2
Max. wiring length 130 m
C 1 W 1 C P 2 P 1
Mount insulation sleeves
Fix the wiring with the
provided clamp (1)
X 2 M