Duct Work; Electrical Wiring; Power Supply Wiring - Mitsubishi Electric PEFY-P-VMH-A-F Manual De Instalación

8. Duct work

• When connecting ducts, insert a canvas duct between the main body and the
duct.
• Use non-combustible duct components.
• Install sufficient thermal insulation to prevent condensation forming on air inlet
and air outlet duct flanges, and air outlet ducts.
[Fig. 8.0.1] (P. 4)
A Air inlet
C Duct

9. Electrical wiring

Precautions on electrical wiring
Warning:
Electrical work should be done by qualified electrical engineers in accord-
ance with "Engineering Standards For Electrical Installation" and supplied
installation manuals. Special circuits should also be used. If the power cir-
cuit lacks capacity or has an installation failure, it may cause a risk of elec-
tric shock or fire.
1. Be sure to take power from the special branch circuit.
2. Be sure to install an earth leakage breaker to the power.
3. Install the unit to prevent that any of the control circuit cables (remote control-
ler, transmission cables) is brought in direct contact with the power cable out-
side the unit.
4. Ensure that there is no slack on all wire connections.
5. Some cables (power, remote controller, transmission cables) above the ceiling
may be bitten by mouses. Use as many metal pipes as possible to insert the
cables into them for protection.
<Table 1>
System configuration
Transmission cable length
Facility example Residence or independent store
(for noise judgment) without noise
VCTF, VCTFK, CVV, CVS, VVR,
Types of transmission
VVF, VCT or shielding wire CVVS
cables
or CPEVS
2. Remote controller cables
Non-shielding wire for up to 10 m; the same specifications
Types of cables
as "1." Wiring transmission cables for more than 10 m
Cable diameter More than 0.5 to 0.75 mm
Add any portion in excess of 10 m to within the longest al-
Length
lowable transmission cable length 200 m (Shielding portion
is more than 1.25 mm

9.1. Power supply wiring

• Power supply cords of appliances shall not be lighter than design 245 IEC or
227 IEC.
• A switch with at least 3 mm contact separation in each pole shall be provided
by the Air conditioner installation.
Power cable size: more than 1.5 mm
[Fig. 9.1.1] (P. 4)
A Switch 16 A
B Overcurrent protection 16 A
C Indoor unit
D Total operating current be less than 16 A
E Pull box
B Air filter (supplied at site)
D Canvas duct
For a single-refrigerant system
Less than 120 m
Building, clinic, hospital or communications
station without noise supposedly generated
from inverter equipment, private power gen-
erator, high-frequency medical equipment,
radio-used communications equipment and
so on
Network remote controller
2
2 )
2
E Access door
G Ensure sufficient length to prevent short cycling
H Air outlet
Caution:
Inlet duct is 850 mm or more necessary to construct.
Always install horizontal.
6. Never connect the power cable to leads for the transmission cables. Otherwise
the cables would be broken.
7. Be sure to connect control cables to the indoor unit, remote controller, and the
outdoor unit.
8. Put the unit to the ground on the outdoor unit side.
9. Select control cables from the conditions given in page 9 .
Caution:
Be sure to put the unit to the ground on the outdoor unit side. Do not con-
nect the earth cable to any gas pipe, water pipe, lightening rod, or telephone
earth cable. Incomplete grounding may cause a risk of electric shock.
Types of control cables
1. Wiring transmission cables
• Types of transmission cables
Design wiring in accordance with the following table <Table 1>.
• Cable diameter
More than 1.25 mm 2
More than 120 m
Shielding wire CVVS or CPEVS
[Selecting non-fuse breaker (NF) or earth leakage breaker (NV)]
To select NF or NV instead of a combination of Class B fuse with switch, use the
following:
• In the case of Class B fuse rated 15 A or 20 A,
NF model name (MITSUBISHI): NF30-CS (15 A) (20 A)
NV model name (MITSUBISHI): NV30-CA (15 A) (20 A)
Use an earth leakage breaker with a sensitivity of less than 30 mA 0.1 s.
Caution:
Do not use anything other than the correct capacity breaker and fuse. Using
fuse, wire or copper wire with too large capacity may cause a risk of mal-
function or fire.
F Ceiling
I Keep duct-work length 850 or more
For a multi-refrigerant system
Regardless of length
All facilities
9