Connecting Remote Controller, Indoor And Outdoor Transmission Cables; Connecting Electrical Wires; Setting Addresses; Sensing Room Temperature With The Built-In Sensor In A Remote Controller - Mitsubishi Electric CITY MULTI PFFY-P20VLEM-E Manual De Instalación

7.2. Connecting remote controller, indoor
and outdoor transmission cables
(Remote controller is optionally available.)
• Connect indoor unit TB5 and outdoor unit TB3. (Non-polarized 2-wire)
The "S" on indoor unit TB5 is a shielding wire connection. For specifications
about the connecting cables, refer to the outdoor unit installation manual.
• Install a remote controller following the manual supplied with the remote con-
troller.
• Connect the "1" and "2" on indoor unit TB15 to a MA remote controller. (Non-
polarized 2-wire)
• Connect the "M1" and "M2" on indoor unit TB5 to a M-NET remote controller.
(Non-polarized 2-wire)
• Connect the remote controller's transmission cable within 10 m using a 0.75 mm
core cable. If the distance is more than 10 m, use a 1.25 mm
[Fig. 7.2.1] (P.4) MA Remote controller
[Fig. 7.2.2] (P.4) M-NET Remote controller
A Terminal block for indoor transmission cable
B Terminal block for outdoor transmission cable
C Remote controller
• DC 9 to 13 V between 1 and 2 (MA remote controller)
• DC 24 to 30 V between M1 and M2 (M-NET remote controller)
[Fig. 7.2.3] (P.4) MA Remote controller
[Fig. 7.2.4] (P.4) M-NET Remote controller
A Non-polarized
C Remote Controller
• The MA remote controller and the M-NET remote controller cannot be used at
the same time or interchangeably.
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.
10
2
2 junction cable.
B Upper level (TB15)
D Lower level (TB5)
H Earth
J Remote controller
B Cover
D Hook
[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.
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.
B Network remote controller
D Shielding