Wiring Transmission Cables - Mitsubishi Electric PQHY-P400 Installationshandbuch

7. Heat exchanger unit – compressor unit connected cable.
Cable name Cable 1
8 core cable
Kind of control cable
(unshielded)
VCT *2
Cable diameter
0.75 mm
Maximum wiring length
Remarks
Put the cable that connects the heat source units
through a conduit tube. Connect both ends of the con-
duit tube to the unit's casing. Do not put cable 1 and
cable 2 through the same conduit tube with cable 3
and cable 4.
*1 : PQHY-P400, 500 type only
*2 : VCT cable is not be lighter than design 245 IEC57.
*3 : VCTF cable is not be lighter than design 245 IEC53.

10.3. Wiring transmission cables

1 Types of control cables
1. Wiring transmission cables
• Types of transmission cables: Shielding wire CVVS or 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/out-
door transmission lines (Maximum length via indoor 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 outdoor unit
and system controller is 200 m.
Example of a group operation system with multiple heat source units (Shielding wires and address setting are
necessary.)
<Examples of transmission cable wiring>
[Fig. 10.3.1] M-NET Remote Controller (P.7)
[Fig. 10.3.2] MA Remote Controller (P.7)
[Fig. 10.3.3] Transmission booster unit (P.7)
<A> Change the jumper connector from CN41 to CN40.
<B> SW2-1:ON
<C> Keep the jumper connector on CN41.
A Group 1 B Group 3
( ): Address
<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, and IC-IC wiring intervals.
b. Use feed wiring to connect terminals M1 and M2 and the earth terminal on the transmission cable terminal block (TB3) of each heat source unit (OC) to terminals M1,
M2 and terminal S on the transmission cable block of the indoor unit (IC).
c. Connect terminals 1 (M1) and 2 (M2) on the transmission cable 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 (OC).
e. On one heat source unit only, change the jumper connector on the control panel from CN41 to CN40.
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 Step above to the earth terminal
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
IC (Main) 01 to 50
IC (Sub) 01 to 50
Heat source Unit 51 to 100
M-NET R/C (Main) 101 to 150
M-NET R/C (Sub) 151 to 200
MA R/C
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.
16
Cable 2 Cable 3 Cable 4 *1
12 core cable 12 core cable 6 core cable
(unshielded) (unshielded) (unshielded)
VCT *2 VCTF *3 VCTF *3
2 2 2
0.75 mm 0.3 mm 0.3 mm
10 m
2
C Group 5
in the electrical component box.
Use the most recent address within the same group of indoor units.
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)
Use the most recent address of all the indoor units plus 50
Set at an IC (Main) address within the same group plus 100
Set at an IC (Main) address within the same group plus 150
– Unnecessary address setting (Necessary main/sub setting)
2. Remote control cables
• M-NET Remote Controller
Kind of remote control cable
Cable diameter
2
Remarks
• MA Remote Controller
Kind of remote control cable
Cable diameter
Remarks
* Connected with simple remote controller.
2 Wiring examples
• Controller name, symbol and allowable number of controllers.
Name
Heat source unit controller
Transmission booster unit
Indoor Unit Controller
Remote Controller
*1 A transmission booster (RP) may be required depending on the number of
connected indoor unit controllers.
D Shielded wire E Sub remote controller
Setting Method
Sheathed 2-core cable (unshielded)
0.3 to 1.25 mm 2 (0.75 to 1.25 mm
When 10 m is exceeded, use cable with the
same specifications as 1. Wiring transmission
cables.
Sheathed 2-core cable (unshielded) CVV
2
0.3 to 1.25 mm (0.75 to 1.25 mm
Within 200 m
Symbol Allowable number of controllers
OC
RP Zero or one unit for one OC (*1)
IC Two to twenty four controllers for one OC (*1)
RC Maximum of two per group
2 )*
2
)*