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Precautions for terminal connections
• Be sure to use ring-type crimp-style terminals provided with
insulation sleeves.
• Use specified electric wires for the wiring and secure the wiring so
that external force will not be imposed on the terminal block.
Crimp-style terminal
• Use an appropriate screwdriver to tighten the terminal screws.
Small-sized screwdriver will damage the screw heads and cannot
tighten the screws properly.
• Do not tighten the terminal screws in excess, otherwise the screws
may be damaged.
• Refer to the following table for the tightening torque values of the
terminal screws.
• Take out the earth wire from the notch of the cup washer and lay
the wire carefully so that other wires will not be caught by the
washer. Otherwise, the earth wire may not contact sufficiently and
the earthing effect of the wire may be lost.
• Do not finish strand wire with solder.
Crimp-style terminal
Screw size
M8 (Power supply terminal block)
M8 (Earth)
M4 (X2M)
M3.5 (X3M)
7-4 Procedure for wiring inside units
• Referring to the following figure, secure and wire the power and
transmission wiring using the accessory clamp (1), (2).
• Lay the ground wire so that it will not come in contact with the lead
wires of the compressor. Other equipment will be adversely
affected if the ground wire comes in contact with the lead wires of
the compressor.
• Make sure all wiring do not contact to the pipes (hatching parts in
the figure).
• The transmission wiring must be at least 50 mm away from the
power wiring.
• After wiring work is completed, check to make sure there are no
loose connections among the electrical parts in the control box.
LREQ15-20
5
16
1
2
3
15
4
14
10
LREQ15+20B7Y1R
Air cooled refrigeration condensing unit
4P360438-1B – 2014.01
Power wire
Insulating sleeve
Cup washer
Cut out section
Tightening torque (N•m)
5.5 - 7.3
2.39 - 2.91
0.79 - 0.97
A1P
6
X1M
X2M
11
A5P
X1M
7
X3M
8
14
12
13
9
13
1
Conduit
2
Perform wiring carefully so that the wiring will not come in contact
with the port and
part.
3
When routing high-voltage wiring (power supply wiring, earth
wires, and warning/caution/run input, operation output wiring)
from the left side
4
Connecting local piping
5
Power supply terminal block (X1M)
6
X2M terminal block for warning, caution, run input, and operation
output
7
Earth terminal block
8
When routing high-voltage wiring (power supply wiring, earth
wires, and warning/caution/run input, operation output wiring)
from the right side
9
When routing high-voltage wiring (power supply wiring, earth
wires, and warning/caution/run input, operation output wiring)
from the front
10 When routing remote operating switch wiring from the front.
11 Remote switch terminal block (X3M)
12 When routing remote switch wiring through a wiring opening
13 Separate by at least 50 mm
14 Fixed to the rear side of the support with the provided clamp (2)
15 Perform wiring carefully so that the sound insulation of the
compressor will not come off
16 Support
CAUTION
On completion of electrical work, check that there are no disconnected
connectors or terminals of any electrical parts in the control box.
8.
INSPECTION AND PIPE INSULATION
For piping work contractor, electrical work contractor,
and trial run workers
• Never open the shutoff valve until the insulation measurement of
the main power supply circuit is finished. The measured insulation
value will become lower if the measurement is made with the
shutoff valve opened.
• On completion of inspection and refrigerant charging, open the
shutoff valve. The compressor will malfunction if the condensing
unit is operated with the shutoff valve closed.
8-1 Airtight test/refrigerant oil charging/vacuum
drying
Refrigerant is enclosed in the unit.
Be sure to keep both liquid and gas shutoff valves
closed at the time of an airtight test or vacuum drying of
the local piping.
[For piping work contractor]
On completion of piping work, make the following inspection precisely.
• To ensure that the condensing unit withstand pressure properly
and prevent the penetration of foreign substances, be sure to use
R410A-dedicated tools.
• To ensure that the condensing unit withstand
pressure properly and prevent the
penetration of foreign substances (water,
Gauge manifold
dirt, and dust), use an R410A-dedicated
Charge hose
gage manifold and charge hose.
R410A-dedicated tools and
R407C-dedicated tools are different in screw
specification.
• Pay the utmost attention so that the pump oil
will not flow backward into the system while
Vacuum pump
the pump is not in operation.
• Use a vacuum pump that can vacuum down
to –100.7kPa (5 Torr or –755 mmHg).
Gas for airtight
• Nitrogen gas
test use
Daphne FVC68D
Refrigerant oil
Only use the refrigerant oil listed in the Daikin
sevice parts list.
Installation manual
16
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