Daikin VRV-WIII, Installation Manual

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7 English
8-4 Examples
System example (Refer to figure 8)
1. Field power supply
2. Main switch
3. Earth leak detector
4. Fuse
5. Cool/heat selector
6. Remote controller
7. Outside unit
8. BS unit
9. Indoor unit
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 weak electric wiring (i.e. for the
remote controller, transmission, etc.) and the strong electric wir-
ing do not pass near each other, keeping them at least 50 mm
apart. Proximity may cause electrical interference, malfunctions,
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: transmission wiring and COOL/HEAT selector .
• Secure the wiring with the accessory clamps so that it does not
touch the piping.
• Make sure the wiring and the EL. COMPO. BOX cover do not stick
up above the structure, and close the cover firmly.
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
Connect the wire to the terminal block on the PC board with care
since too much pressure may cause breakage of the PC board.
[In case of single outside unit system]
(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 multi outside unit system]
(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 30 m
in length at maximum.
[Setting the interlock circuit and pump operation
output.]
〈
Pump operation output [high voltage]
〉
• Use insulated wires of the size as mentioned below having rated
voltage of 250 V or higher:
For single core: 1.25 mm² or larger (conduit pipe work)
For multiple cores: 0.75 mm² or larger
*The wiring for pump operation output is to be procured locally.
(Refer to figure 12)
1. Pump operation output terminal (X2M)
When water pump is linked with system operation, water
pump operation circuit shall be set between terminals (1)
and (2).
Contact specification --- 220 VAC, 3mA-0.5A
2. PC board (A1P)
3. Mount an insulation sleeve.
4. Connection of interlock circuit
Do not forget to connect an interlock circuit (an auxiliary
a-contact of electromagnetic switch for the water pump)
to each outside unit.
(Select without fail an auxiliary a-contact able to switch
minimum load of DC15V, 1mA.)
〈
When connecting for each outside unit
〉
Connect to the terminal block (X3M) as shown in the bot-
tom right of the sketch.
〈
When connecting multiple outside units as 1 single unit
(centralized interlock)
〉
For this unit, it is possible to make a centralized interlock
of multiple outside units using an adapter (sold sepa-
rately as an accessory) for external control of outside
units.
For details of wiring connection, refer to “
How to cen-
tralized interlock wiring ”.
〈
How to the centralized interlock wiring
〉
• When centralized interlock is done, see (3) “ 8-5 In case of a local
setting ”
• No wiring to terminal block X3M is necessary when centralized
interlock is employed
• For multi system, external/external connection wiring shall be
done for master unit only.
(Refer to figure 13)
1. Outside unit A
2. Outside unit B
3. Outside unit C
4. Adapter for external control
5. Interlock circuit of water pump
6. Out-Out connection wiring
7. Use the conductor of sheathed wire (2 wire)(no polarity)
[Setting the cool/heat operation type]
1. Performing cool/heat setting with the remote controller con-
nected to the indoor unit.
Keep the COOL/HEAT selector switch (DS1) on the outside
unit PC board (A1P) at the factory setting position OFF.
(Refer to figure 16)
1.
Remote controller
2. Performing cool/heat setting with the COOL/HEAT selector.
Connect the COOL/HEAT selector (optional) to the A/B/C
terminals and set the COOL/HEAT selector switch (DS1) on
the outside unit PC board (A1P) to ON.
(Refer to figure 17)
1.
COOL/HEAT selector
• For the above wiring, always use sheathed vinyl cords with 0.75 to
1.25 mm
2
or cables (2 core wires). (3 core wire are allowable for
the COOL/HEAT selector only.)
• All transmission wire is field supply.
• If the following limits should be exceeded, be careful that any
abnormal transmission may be caused;
Maximum wiring length........................1000 m or less
Total wiring length................................2000 m or less
Maximum branching ............................16 branching or less
Wire length between outside unit ........30 m or less
• Never connect power supply to any connection wiring and its
terminal block
, otherwise the entire system may be damaged.
• Up to 16 branches are possible for transmission wiring. However
no branch is allowed after branch.
(Refer to figure 14)
1. Branch
2. Branch after branch
01_EN_3P153897-8L.fm Page 7 Friday, July 11, 2008 5:04 PM