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10
• VRV Systems • Outdoor Units
95
• Outdoor Units • HEAT PUMP • RWEYQ-MY1
10
Installation of outdoor units
10 - 8 Field wiring
10 - 8 - 4
Examples
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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
햲
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
햳
PC board (A1P)
햴
Mount an insulation sleeve.
햵
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 bottom right of the sketch.
<When connecting in a lump-sum manner (centralized interlock)>
For this unit, it is possible to make a lump-sum interlock of multiple outside unit using an adapter (sold separately 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) “
10-8-5 In case of a local setting
”
•
No wiring to terminal block X3M is necessary when centralized interlock is employed
•
For RWEYQ20·30MY1, external/external connection wiring shall be done for master unit only.
햲
Outside unit A
햳
Outside unit B
햴
Outside unit C
햵
Adapter for external control
햶
Interlock circuit of water pump
햷
Out-Out connection wiring
햸
Use the conductor of sheathed wire (2 wire) (no polarity)
Low noise
OUT-OUT
OUT-OUT
OUT-OUT
