Daikin RXYQ26PY1 Installation Manual download pdf (Page 12)

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

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

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Daikin RXYQ26PY1 Installation Manual Page 12

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