Connecting Electrical Wires; Setting Addresses; Sensing Room Temperature With The Built-In Sensor In A Remote Controller - Mitsubishi Electric PFFY-P20VLEM-E Installationshandbuch

Note:
Ensure that the wiring is not pinched when fitting the terminal box cover.
Pinching the wiring may cut it.
Caution:
Install wiring so that it is not tight and under tension. Wiring under tension
may break, or overheat and burn.
• Fix power source wiring to control box by using buffer bushing for tensile force.
(PG connection or the like.) Connect transmission wiring to transmission ter-
minal block through the knockout hole of control box using ordinary bushing.
• After wiring is complete, make sure again that there is no slack on the connec-
tions, and attach the cover onto the control box in the reverse order removal.
Caution:
Wire the power supply so that no tension is imparted. Otherwise disconnec-
tion, heating or fire result.
Notes:
*1 Put the transmission cable earth via the outdoor unit's earth terminal
to the ground.
[Constraints on transmission cable]
[Fig. 7.2.5] (P.4)
G Outdoor unit
I Indoor unit
K 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-VLEM 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. Follow
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)
A Control box
C 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 transmission ter-
minal bed through the knockout hole of control box using ordinary bushing.
3. As shown at 2, wire the power supply, transmission cable and remote control-
ler. There is no need to remove the control box.
[Fig. 7.3.2] (P.4)
A DC 24 to 30 V
C Terminal bed for power supply
E Terminal bed for transmission cable F To single-phase power supply
G To terminal bed for outdoor transmission cable
* Take shielding earth on the outdoor unit side.
H To terminal bed for transmission cable, remote controller, indoor BC controller
4. After wiring is complete, make sure again that there is no slack on the connec-
tions, 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 disconnec-
tion, 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.
10
H Earth
J Remote controller
B Cover
D Hook
B Network remote controller
D Shielding
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 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.