Daikin RWEYQ72, Engineeiring Data

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Installation EDUS30-900-N
38 Installation of Outdoor Units
8-3 General
• Make sure to connect the power source wire to the power source
terminal block and to clamp it as shown in figure 8, chapter “Field
line connection”.
• As this unit is equipped with an inverter, installing a phase advanc-
ing capacitor will not only reduce the power factor improvement
effect, but also may cause the capacitor to overheat due to high-
frequency waves. Therefore, never install a phase advancing
capacitor.
• Keep power imbalance within 2% of the supply rating.
1.
Large imbalance will shorten the life of the smoothing capaci-
tor.
2.
As a protective measure, the product will stop operating and an
error indication will be made, when power imbalance exceeds
4% of the supply rating.
• Follow the “electrical wiring diagram” when carrying out any elec-
trical wiring.
• Only proceed with wiring work after blockingshutting off all power.
• Always ground wires. (In accordance with national regulations of
the pertinent country.)
•
This unit uses an inverter, and therefore generates noise, which
will have to be reduced to avoid interfering with other devices. The
outer casing of the product may take on an electrical charge due to
leaked electrical current, which will have to be discharged with the
grounding.
•
This unit has a negative phase protection circuit. (If it operates,
only operate the unit after correcting the wiring.)
WARNING
• Do not ground units to gas pipes, sewage pipes, lightning rods,
or telephone ground wires because incomplete grounding could
cause a severe shock hazard resulting in severe injury or death.
Gas pipes:
can explode or catch fire if there is a gas leak.
Sewage pipes: no grounding effect is possible if hard plastic pip-
ing is used.
Telephone ground wires and lightning rods:
dangerous when
struck by lightning due to abnormal rise in electrical potential in
the grounding.
8-4 Examples
System example (Refer to figure 8)
1.
Field power supply
2.
Main switch
3.
Disconnect switch
4.
Maximum Overcurrent Protection
5.
Ground fault circuit interrupter
6.
Remote controller
7.
Outside unit
8.
BS unit
9.
Indoor unit
10.
Cool / heat selector
power supply wiring (sheathed cable)
transmission wiring (sheathed cable)
CAUTION
• Use a power wire pipe for the power wiring.
• Outside the unit, make sure the low-voltage electric wiring (i.e. for
the remote controller, tarnsmission, etc.) and the high-voltage
electric wiring do not pass near each other, keeping them at least
5 in. apart. Proximity may cause electrical interference, malfunc-
tions, and breakage.
• Be sure to connect the power wiring to the power wiring terminal
block and secure it as described in Field line connection .
• Transmission wiring should be secured as described in
Field line
connection.
• Secure the wiring with the accessory clamps so that it does not
touch the piping.
• Make sure the wiring and the electrical components box lid do not
stick up above the structure, and close the cover firmly.
WARNING
•
Never connect power supply wiring to the terminal block for remote
controller wiring as this could damage the entire system.
Picking power line and transmission line
(Refer to figure 9)
1.
Power supply wiring and wiring for pump operation
(High voltage)
2.
Connection wiring
(Low voltage)
3.
Set apart
Connect the wire to the terminal block on PC board with care
since too much pressure may cause breakage of the PC board.
Field line connection: transmission wiring, interlock circuit,
pump operation output and COOL/HEAT selector
Power and transmission line: Connect it using conduit mounting
plates.
[In case of single outside unit]
(Refer to figure 10)
1.
COOL/HEAT selector
2.
Outside unit PC board (A1P)
3.
Take care of the polarity
4.
Use the conductor of sheathed wire (2 wire)(no polarity)
5.
Terminal board (field supply)
6.
Indoor unit
7.
Never connect the power wire.
8.
BS unit A
9.
BS unit B
10.
Last BS unit
11.
Cool-only unit
[In case of multiple outside units]
(Refer to figure 11)
1.
Unit A (Master unit)
2.
Unit B
3.
Unit C
4.
TO IN/D UNIT
5.
TO OUT/D UNIT
6.
TO MULTI UNIT
7.
To COOL/HEAT selector (only Heat pump system)
8.
To indoor unit
9.
To other systems
• The transmission wiring between the outside units in the same
pipe line must be connected to the Q1/Q2 (Out Multi) terminals.
Connecting the wires to the (Out-Out) terminals results in system
malfunction.
• The wiring for the other lines must be connected to the F1/F2 (Out-
Out) terminals of the PC board in the outside unit to which the
transmission wiring for the indoor units is connected.
• The outside unit to which the transmission wiring for the indoor
units is connected is master unit.
• The transmission wiring between the outside units must be 100 ft.
in length at maximum.
NOTE
• Be sure to keep the power line and transmission line apart from
each other.
Be careful about polarity of the transmission line.
Make sure that the transmission line is clamped as shown in the
figure in chapter “Field line connection”.
Check that wiring lines do not make contact with refrigerant piping.
Firmly close the lid and arrange the electric wires so as to prevent
the lid or other parts from coming loose.
Top plate
Conduit
(field supply)
Lock nut
(field supply)
Conduit
mounting
plate
(accessory)
Top plate