Restrictions; Types And Maximum Allowable Length Of Cables - Mitsubishi PWFY-P36NMU-E-BU Service Handbook

™ ™ Restrictions
[1] T ypes and Maximum allowable Length of Cables
1. Wiring work
(1) Notes
1) Have all electrical work performed by an authorized electrician according to the local regulations and instructions in this man-
ual.
2) Install external transmission cables at least 5cm [1-31/32"] away from the power supply cable to avoid noise interference.
(Donot put the control cable and power supply cable in the same conduit tube.)
3) Provide grounding for the outdoor unit as required.
4) Run the cable from the electric box of the indoor or outdoor unit in such way that the box is accessible for servicing.
5) Do not connect power supply wiring to the terminal block for transmission line. Doing so will damage the electronic compo-
nents on the terminal block.
6) Use 2-core shielded cables as transmission cables.
Use a separate 2-core control cable for each refrigerant system. Do not use a single multiple-core cable to connect indoor
units that belong to different refrigerant systems. The use of a multiple-core cable may result in signal transmission errors and
malfunctions.
Unit
2-core cable
2-core cable
(2) Control wiring

Types and maximum allowable length of cables

Control lines are categorized into 2 types: transmission line and remote controller line.
Use the appropriate type of cables and observe the maximum allowable length specified for a given system. If a given system
has a long transmission line or if a noise source is located near the unit, place the unit away from the noise source to reduce
noise interference.
PWFY-P36NMU-E-BU
Transmission cables
Shielding wire (2-core)
Type of cable
CVVS, CPEVS or MVVS
More than 1.25 mm
Cable diameter
Remarks
PWFY-P36, P72NMU-E/E2-AU
Transmission cables
Shielding wire (2-core)
Type of cable
CVVS, CPEVS or MVVS
Cable diameter More than 1.25 mm
Remarks
*1 Connected with simple remote controller. CVVS, MVVS: PVC insulated PVC jacketed shielded control cable
Unit
Remote
controller
BC controller
MA Remote controller cables
Sheathed 2-core cable (shielded)
CVVS
2 2
0.3 ~ 1.25 mm (0.75 ~ 1.25 mm
-
Max.length: 200 m
MA Remote controller cables
Sheathed 2-core cable (shielded)
CVVS
2
2
0.3 ~ 1.25 mm (0.75 ~ 1.25 mm
-
Max.length: 200 m
CVV, MVV : PVC insulated PVC sheathed control cable
CPEVS : PE insulated PVC jacketed shielded communication cable
Unit
Multiple-
core cable
External input
Sheathed multi-core cable (shielded)
CVVS or MVVS
2
)*1 0.3 ~ 0.5 mm
Max.length: 100 m
External input
Sheathed multi-core cable (shielded)
CVVS or MVVS
2
)*1 0.3 ~ 0.5 mm
Max.length: 100 m
- 18 -
Unit
Remote
controller
BC controller
External output
Sheathed multi-core cable (shielded)
CVVS or MVVS
2
0.3 ~ 1.25 mm
Rated voltage: L1-N: 208 ~ 230 V
Rated load: 0.6 A
External output
Sheathed multi-core cable (shielded)
CVVS or MVVS
2
0.3 ~ 1.25 mm
Rated voltage: L1-N: 208 ~ 230 V
Rated load: 0.6 A
2
2