Sample System Connection - Mitsubishi Electric PUHY-P250YJM-A Data Book

6. Sample System Connection

(1) System with MA remote controller
1) Single refrigerant circuit
Leave the male
Leave the male connector on
connector on
CN41 as it is.
OS
CN41 as it is.
52
TB3
TB7
M1 M2 S M1 M2
1. Leave the male connector on the female power supply switch connector (CN41) as it is.
2. Grounding to S terminal on the terminal block for transmission line for centralized control
(TB7) is not required.
3. Although two indoor controllers (controller circuit boards) are equipped inside the indoor
unit (20HP), the board on No.2 side (lower side) is not used. Do not connect wiring to the
lower controller circuit board.
4. The outdoor unit cannot be connected to the units other than the PFD series indoor units.
<a. Indoor/Outdoor transmission line>
Connect M1, M2 terminals of the indoor/outdoor transmission line terminal block (TB3) on the outdoor unit (OC) and A1, B1 terminals of the
indoor/outdoor terminal block (TB5-1) on the indoor unit (IC). (Non-polarized 2-core cable) *Only use shielded cables.
[Shielded cable connection]
Connect the earth terminal of the OC and S terminal of the IC terminal block (TB5-1).
<b. Switch setting>
Address setting is required as follows.
Unit or controller
Main
(10HP, 20HP)
Indoor
1
unit
Sub
(20HP)
2 Outdoor unit
MA
Main Controller
3 remote
controller
Sub Controller
Control Wiring Diagram
L2 L1
OC IC
51
01
TB3 TB5-1
TB7
M1 M2 S M1 M2 A1B1 S
TB15
1 2
A B
MA
02
TB5-2
A2 B2 S
Notes
Wiring and Address Setting
Address
Address setting method
setting range
Assign a sequential odd number starting with
IC 01~49
"01" to the upper indoor controller.
Assign sequential numbers starting with the
IC 02~50
address of the main unit in the same group.
(Main unit address +1)
Add 50 to the address assigned to the indoor unit
OC
51~99
connected to the same refrigerant circuit.
Set consecutive numbers for the addresses of
OS
52~100
(20HP) outdoor units in the same refrigerant circuit system.
MA
Setting not required.
Sub Controller
MA Settings to be made with the sub/main switch
* One indoor controller (controller circuit board)
is equipped in the indoor unit (10HP), and two
indoor controllers (controller circuit boards)
are equipped in the indoor unit (20HP).
<a. Indoor/Outdoor transmission line>
Maximum Length (1.25mm
- 46 -
Maximum Allowable Length
2
or more)
L1 + L2 ” 200m
Notes
To set the address to 100, set the
rotary switches to 50.
Factory
setting
00
00
Main