Connecting Electrical Wires; Setting Addresses; Sensing Room Temperature With The Built-In Sensor In A Remote Controller - Mitsubishi Electric CITY MULTI PFFY-P-NEMU-E Manuel D'utilisation

Caution:
Wire the power supply so that no tension is imparted. Otherwise discon-
nection, heating or fire result.
Notes:
*1 Take shielding ground on the outdoor unit's ground terminal
[Constraints on transmission cable]
[Fig. 7.2.5] (P.4)
Outdoor unit
Indoor unit
Non-polarized 2-wire

7.3. Connecting electrical wires

(Ensure that there is no slack on terminal screws.)
Make sure that the model name in the operation manual attached to the control
box cover is the same as that on the rating plate.
Note:
The PFFY-P-NEMU Series should be wired after removing the front panel. It
is possible to attach a remote controller to the units of this type. For more
information, refer to the descriptions on the plate which you may find when
opening the cover located on the right-hand side of the blowout hole. Fol-
low the descriptions to attach a remote controller if you want.
1. Remove two screws which secures the control box cover using a screwdriver.
[Fig. 7.3.1] (P.4)
Control box
Screw
2. Fix power source wiring to control box by using buffer bushing for tensile
force. (PG connection or the like.) Connect transmission wiring to transmis-
sion terminal bed through the knockout hole of control box using ordinary
bushing.
3. As shown at B, wire the power supply, transmission cable and remote con-
troller. There is no need to remove the control box.
[Fig. 7.3.2] (P.4)
DC 24 to 30 V
Terminal bed for power supply
Shielding
Terminal bed for transmission cable
To single-phase power supply
To terminal bed for outdoor transmission cable
To terminal bed for transmission cable, M-NET remote controller, indoor BC
controller
4. After wiring is complete, make sure again that there is no slack on the con-
nections, and attach the cover onto the control box in the reverse order of
removal.
Caution:
Fix the electrical wires at site using clamps.
Caution:
Wire the power supply so that no tension is imparted. Otherwise discon-
nection, heating or fire may result.

7.4. Setting addresses

(Be sure to operate with the main power turned OFF.)
[Fig. 7.4.1] (P.4)
<Address board>
• 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".
• The rotary switches are all set to "0" when shipped from the factory. These
switches can be used to set unit addresses at will.
• The determination of indoor unit addresses varies with the system at site. Set
them referring to technical data.
Note:
Please set the switch SW5 according to the power supply voltage.
• Set SW5 to 240 V side when the power supply is 230 volts.
• When the power supply is 208 volts, set SW5 to 220 V side.
7.5. 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 con-
troller, 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 heat-
ing thermometer is OFF.
10
.
Ground
M-NET Remote controller
Cover
Hook