Mitsubishi Electric PFFY-P25VLRMM-E [10/11] Selecting the external static pressure

Mitsubishi Electric PFFY-P20VLRMM-E [10/11] Selecting the external static pressure

INL

PGRRUTR

[Shield wire connection]

[Fig. 7.3.4] (P.4)

A Terminal block B Round terminal

C Shield wire

D The earth wire from two cables are connected together to the S terminal. (Dead-

end connection)

E Insulation tape (To keep the earth wire of the shielded cable from coming in con-

tact with the transmission terminal)

5. After wiring is complete, make sure again that there is no slack on the connec-

tions, and attach the cover onto the terminal block box in the reverse order of

removal.

Notes:

• Do not pinch the cables or wires when attaching the terminal block box

cover. Doing so may cause a risk of disconnection.

• When accommodating the terminal block box, make sure that the con-

nectors on the box side are not removed. If removed, it cannot operate

normally.

Caution:

Fix the electrical wires at site using clamps.

Caution:

Wire the power supply so that no tension is imparted. Otherwise disconnec-

tion, heating or fire may result.

7.4. Selecting the external static pressure

As the factory setting is for use under an external static pressure of 20 Pa, no

switch operation is needed when using under the standard condition.

[Fig. 7.4.1] (P.4)

7.5. Setting addresses

(Be sure to operate with the main power turned OFF.)

[Fig. 7.4.1] (P.4)

• There are two types of rotary switch setting available: setting addresses 1 to 9

and over 10, and setting branch numbers.

1 How to set addresses

Example: If Address is “3”, remain SW12 (for over 10) at “0”, and match

SW11(for 1 to 9) with “3”.

2 How to set branch numbers SW14 (Series R2 only)

The branch number assigned to each indoor unit is the port number of the

BC controller to which the indoor unit is connected.

Leave it to “0” on the non-R2 series of units.

• The rotary switches are all set to “0” when shipped from the factory. These

switches can be used to set unit addresses and branch numbers at will.

• The determination of indoor unit addresses varies with the system at site. Set

them referring to the Data Book.

7.6. Sensing room temperature with the

built-in sensor in a remote controller

If you want to sense room temperature with the built-in sensor in a remote control-

ler, set SW1-1 on the control board to “ON”. The setting of SW1-7 and SW1-8 as

necessary also makes it possible to adjust the air flow at a time when the heating

thermometer is OFF.

External static pressure Switch operation

20 Pa

40 Pa

60 Pa

SWC

SWA

SWC

SWA

SWC

SWA

WT05228X01_en 07.8.24, 6:05 PM10

Mitsubishi Electric PFFY-P25VLRMM-E [10/11] Selecting the external static pressure

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