Mitsubishi Electronics PUHY-HP-THMU-A Ground, Sequence with the IC Main, Transmission booster

[Fig. 11.3.3] Combination of outdoor units and transmission booster unit

	L1		L2	L3	L5	L6
OS	OC	IC	IC	RP	Ground
(52)	(51)				IC	IC
				TB2	TB3
TB3	TB3	TB5	TB5	A B S A B S
					TB5	TB5
M1 M2	M1 M2	M1 M2 S	M1 M2 S		M1 M2 S	M1 M2 S

r1 L4

A Group 1 B Group 3

( ) Address

A B

ME

C

	L7
	r1
	A B
	ME
Group 5	D Shielded wire	E Sub remote controller

GB

<Wiring Method and Address Settings>

a.Always use shielded wire when making connections between the outdoor unit (OC) and the indoor unit (IC), as well for all OC-OC, OC-OS and IC-IC wiring intervals.

b.Use feed wiring to connect terminals M1 and M2 and the ground terminal on the transmission line terminal block (TB3) of each outdoor unit (OC) to terminals M1, M2 and terminal S on the transmission line block of the indoor unit (IC). For OC and OS, connect TB3 to TB3.

c.Connect terminals 1 (M1) and 2 (M2) on the transmission line terminal block of the indoor unit (IC) that has the most recent address within the same group to the terminal block on the remote controller (RC).

d.Connect together terminals M1, M2 and terminal S on the terminal block for central control (TB7) for the outdoor unit in a different refrigerant system (OC). For OC and OS in the same refrigerant system, connect TB7 to TB7.

e.When the power supply unit is not installed on the central control transmission line, change the jumper connector on the control board from CN41 to CN40 of only one outdoor unit in the system.

f.Connect the terminal S on the terminal block for central control (TB7) for the outdoor unit (OC) for the unit into which the jumper connector was inserted into CN40 in the

Step above to the ground terminal in the electrical component box.

g.Set the address setting switch as follows.

*To set the outdoor unit address to 100, the outdoor address setting switch must be set to 50.

Unit	Range	Setting Method
Indoor unit (Main)	01 to 50	Use the most recent address within the same group of indoor units
Indoor unit (Sub)	01 to 50	Use an address, other than that of the IC (Main) from among the units within the same group of indoor units. This must be
		in sequence with the IC (Main)
Outdoor Unit (OC, OS)	51 to 100	Set the addresses of the outdoor units in the same refrigerant system in the order of sequential number. OC and OS are
		automatically identified. (*1)
M-NET R/C (Main)	101 to 150	Set at an IC (Main) address within the same group plus 100
M-NET R/C (Sub)	151 to 200	Set at an IC (Main) address within the same group plus 150
MA R/C	–	Unnecessary address setting (Necessary main/sub setting)

h.The group setting operations among the multiple indoor units is done by the remote controller (RC) after the electrical power has been turned on.

i.When the centralized remote controller is connected to the system, set centralized control switches (SW2-1) on control boards in all outdoor units (OC, OS) to “ON”.

*1 OC and OS of the outdoor units in the same refrigerant system are automatically identified. They are identified as OC and OS in descending order of capacity. (If the capacity is the same, they are identified in the ascending order of their address number.)

<Permissible Lengths>

1M-NET Remote controller

• Max length via outdoor units: L1+L2+L3+L4 and L1+L2+L3+L5 and L1+L2+L6 = 500 m [1640 ft] (1.25 mm2 [AWG 16] or more)

• Max transmission cable length: L1 and L3+L4 and L3+L5 and L6 and L2+L6 = 200 m [656 ft] (1.25 mm2 [AWG 16] or more)

•Remote controller cable length: r1, r2, r3, r4 = 10 m [32 ft] (0.3 to 1.25 mm2 [AWG 22 to 16])

If the length exceeds 10 m [32 ft], use a 1.25 mm2 [AWG 16] shielded wire. The length of this section (L8) should be included in the calculation of the maximum length and overall length.

2MA Remote controller

•Max length via outdoor unit (M-NET cable): L1+L2+L3+L4 and L1+L2+L6 = 500 m [1640 ft] (1.25 mm2 [AWG 16] or more)

• Max transmission cable length (M-NET cable): L1 and L3+L4 and L6 and L2+L6 = 200 m [656 ft] (1.25 mm2 [AWG 16] or more)

•Remote controller cable length: c1+c2 and c1+c2+c3+c4 = 200 m [656 ft] (0.3 to 1.25 mm2 [AWG 22 to 16])

3Transmission booster

•Max transmission cable length (M-NET cable): 1 L1+L2+L3+L5+L6 = 200 m [656 ft] (1.25 mm2 [AWG 16])

2 L1+L2+L3+L5+L7 = 200 m [656 ft] (1.25 mm2 [AWG 16])

3 L1+L2+L4 = 200 m [656 ft] (1.25 mm2 [AWG 16])

4 L6+L5+L3+L4, L4+L3+L5+L7 = 200 m [656 ft] (1.25 mm2 [AWG 16])

15