How To Install - Mitsubishi Electric PAC-YT51CRA Manuel D'installation

(2) When grouping with difference refrigerant systems
• Group using the remote controller wiring. Connect the remote controller to an arbitrary indoor unit of each refrigerant system you want to group.
• When mixing different types of indoor units in the same group, always make the outdoor unit connecting the indoor unit with the most
functions (wind velocity, vane, louver, etc.) the master unit (refrigerant address = 00). Also, when the master unit is the simultaneous
multi type, always satisfy the conditions of (1) above.
• The MA compact remote controller can control up to 16 refrigerant systems as one group.
(3) Up to two remote controllers can be connected to one group
• When two remote controllers are connected to one group, always set the master remote controller and subordinate remote controller.
• When only one remote controller is connected to one group, set it as the master controller. When two remote controllers are connected to one
group, set the master remote controller and subordinate remote controller. (For a description of how to set the master/subordinate switch, see
step 5 in section

4 How To Install .)

(4) Total length of remote controller wiring
• The remote controller can be wired up to 200 m (656-1/8 ft). Procure 0.75 ~ 1.25 mm
CAUTION - The wiring cannot be connected to TB5 of the indoor unit of the same refrigerant system. If so connected, the system will not
operate normally.
- Remote controllers cannot be wired together. Only one wire can be connected to the remote controller terminal block.
- When connecting to TB5, connect up to two wires of the same size to one terminal block.
Simultaneous twin
Refrigerant
a
address=00
TB1
TB4
b
TB5
d
4 How To Install
1. Mount the switch box
(1) Install the switch box (purchased separately) as ex-
plained below.
Switch box
Outline of remote
controller
40 mm (1-19/32 in) or more
(2) Purchase the thin-copper wiring pipe and locknuts and bushings separately.
2. Install the remote controller
(1) Pull out about 80 mm of cable from the wall and remove the insulation from its end.
(2) Use putty to seal the cable lead-in hole in order to prevent insects from damaging the wiring and to prevent air from condensing on the remote
controller circuit board. If the hole is not sealed well, the remote controller circuit board may be damaged.
11
(7/16)
Leading
wire
(3) Connect the cable to the terminal board in the bottom rear of the simple MA controller unit.
(4) Remove the controller cover using a standard screwdriver, then attach the simple MA controller unit to the switch box using the two enclosed
cross-recessed pan-head screws. Use a standard screwdriver with a blade that is 4 mm (5/32 in) or wider to remove the cover.
Simultaneous twin
Standard 1:1
Refrigerant
a
address=00
TB1
TB4
TB4
b b
TB5 TB5
d
NOTE: - Be sure to install the switch box with the clearance shown in the illustra-
Projecting
object such as
a stud
10
(13/32)
Insu- Sheath
lation
• The cable does not have polarity.
• When connecting stranded cable, hold down the button on the terminal board while inserting
the cable.
Button: • The cable connects to the main terminal board when it is inserted into the bottom terminal.
Press here.
• When disconnecting the cable, hold down the button while pulling out the cable.
• After inserting the cable, slightly tug on it to check that it does not easily disconnect. If the
Insert the cable.
cable is not securely connected, a short-circuit or malfunction may occur.
Remove controller cover
2 (16 ~ 28 AWG), 2-core cable at the installation site.
Standard 1:1
Refrigerant
a a
address=01
TB1
TB1
TB4 TB4
TB4
b b b
TB5 TB5 TB5
d
tion at the left. (Check the space between the unit and any projection
such as a stud.)
- Leave a space of 120 mm (4-3/4 in) or more below the remote controller
so that the screwdriver can be used.
- Since the remote controller is equipped with a temperature sensor, in-
stall the remote controller in a location where the average room tem-
perature can be detected and which is not directly affected by some heat
source, direct sunlight or air blown from an air conditioner.
Wall
80mm
(3-3/16 in)
Seal with putty.
Cable
Refrigerant
address=00
a Outdoor unit
b Indoor unit
d Main Remote Controller
e
e Sub remote controller
Wiring pipe
One switch box (with cover)
3