Special function, 50%, 75% | Mitsubishi Electronics PUY-A42NHA2-BS

Special function

(a) Low-level sound priority mode (Local wiring)

Unit enters into Low-level sound priority mode by external signal input setting.

Inputting external signals to the outdoor unit decreases the outdoor unit operation sound 3 to 4 dB lower than that of usual. Adding a commercial timer or on-off switch contactor setting to the CNDM connector which is optional contactor for demand input located on the outdoor controller board enables to control compressor operation frequency.

WThe performance depends on the load of conditioned outdoor temperature.

How to wire

<Low-level sound priority mode circuit>

Insulate this point securely as this is not used.

Purchased locally

Relay supply

~ SW1

Adaptor for external signal input (PAC-SC36NA)

Red 3

Brown 2

Orange 1

Outdoor unit controller board

CNDM

	SW1 : Switch	Max. 10 m[33ft] including local wiring
	X : Relay (Contact spec. : DC1mA)	Max. 10 m[33ft] including local wiring
	X : Relay (Contact spec. : DC1mA)

1)Make the circuit as shown above with Adaptor for external signal input(PAC-SC36NA).

2)Turn SW1 to on for Low-level sound priority mode.

Turn SW1 to off to release Low-level sound priority mode and normal operation.

(b)Demand control (Local wiring)

Demand control is available by external input. In this mode, power consumption is decreased within the range of usual 0~100%.

How to wire

Basically, the wiring is the same as (a).

Connect an SW 1 which is procured at field to the between Orange and Red(1 and 3) of the Adaptor for external signal input(PAC-SC36NA), and insulate the tip of the brown lead wire.

It is possible to set it to the following power consumption (compared with ratings) by setting the SW7-1, 2.

SW7-1	SW7-2	Power consumption
SW7-1	SW7-2	(SW1 on)
OFF	OFF	0% (Operation stop)

ON	OFF	50%

OFF	ON	75%

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