Wiring Transmission Cables; Wiring Examples - Mitsubishi Electric CITY MULTI PQHY-P200YHM-A Manuel D'installation

11.3. Wiring transmission cables

1 Types of control cables
1. Wiring transmission cables
• Types of transmission cables: Shielding wire CVVS, CPEVS or MVVS
• Cable diameter: More than 1.25 mm
• Maximum wiring length: Within 200 m
• Maximum length of transmission lines for centralized control and indoor/heat source transmission lines (Maximum length via heat source units): 500 m MAX
The maximum length of the wiring between power supply unit for transmission lines (on the transmission lines for centralized control) and each heat source unit and
system controller is 200 m.
2. Remote control cables
• M-NET Remote Controller
Kind of remote control cable Sheathed 2-core cable (unshielded) CVV
Cable diameter 0.3 to 1.25 mm
When 10 m is exceeded, use cable with
Remarks the same specifi cations as 1. Wiring
transmission cables.
• MA Remote Controller
Kind of remote control cable Sheathed 2-core cable (unshielded) CVV
Cable diameter 0.3 to 1.25 mm
Remarks Within 200 m
* Connected with simple remote controller.

2 Wiring examples

• Controller name, symbol and allowable number of controllers.
Name
Heat source unit Main unit
Sub unit
BC controller Main unit
Sub unit
Indoor unit Indoor unit controller
Remote controller Remote controller (*1)
Other Transmission booster unit
*1 A transmission booster (RP) may be required depending on the number of connected indoor unit controllers.
*2 OC and OS of the heat source units in the same refrigerant system are automatically identifi ed. They are identifi ed as OC and OS in descending order of capacity. (If
the capacity is the same, they will be in ascending order of their address number.)
Example of a group operation system with multiple heat source units (Shielding wires and address setting are
necessary.)
<Examples of transmission cable wiring>
[Fig. 11.3.1] [Fig. 11.3.4] M-NET Remote Controller (P.10, 12)
*1: When the power supply unit is not connected to the transmission line for centralized control, disconnect the male power supply connector (CN41) from ONE
heat source unit in the system and connect it to CN40.
*2: If a system controller is used, set SW2-1 on all of the heat source units to ON.
[Fig. 11.3.2] [Fig. 11.3.5] MA Remote Controller (P.11, 13)
<A> Change the jumper connector from CN41 to CN40
<B> SW2-1:ON
<C> Keep the jumper connector on CN41
Group 1
A B
( ) Address
[Fig. 11.3.6] Combination of heat source units and transmission booster unit (P.13)
• ( ) Address
• Daisy-chain terminals (TB3) on heat source units in the same refrigerant system together.
• Leave the power jumper connector on CN41 as it is. When connecting a system controller to the transmission line (TB7) for centralized control, refer to
[Fig. 11.3.1]~[Fig. 11.3.4], or DATA BOOK.
<Wiring Method and Address Settings>
a. Always use shielded wire when making connections between the heat source 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 earth terminal
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 heat source 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 on only
one heat source unit in the system.
f. Connect the terminal S on the terminal block for central control (TB7) for the heat source unit (OC) for the unit into which the jumper connector was inserted into
CN40 in the step above to the earth terminal
g. Set the address setting switch as follows.
* To set the heat source unit address to 100, the heat source address setting switch must be set to 50.
26
2
2 (0.75 to 1.25 mm 2 )*
(0.75 to 1.25 mm )*
2 2
Group 3 C Group 5
in the electrical component box.
Code Possible unit connections
OC – (*2)
OS – (*2)
BC One controller for one OC
BS Zero, one or two controllers for one OC
IC 1 to 50 units per 1 OC (*1)
RC 2 units maximum per group
RP 0 to 2 units per 1 OC (*1)
Shielded wire Sub remote controller
D E
on the transmission line terminal block (TB3) of each heat source unit (OC) to terminals