Duct Work; Electrical Wiring - Mitsubishi Electric PEA-RP200 GA Manuel D'installation

1. Ensure that a drain trap is installed. If this is neglected, condensation may
occur inside the indoor unit leading to water leakage/equipment breakdown,
etc.
2. Ensure that the drain piping is downward (pitch of more than 20 mm/m) to the
outdoor (discharge) side.
3. Ensure that any cross-wise drain piping is less than 20 m (excluding the differ-
ence of elevation). If the drain piping is long, provide metal braces to prevent it

8. Duct work

• In connecting duct, insert canvas duct between unit and duct.
• Use incombustible material for duct parts.
• Provide full insulation to inlet duct flange, outlet duct flange and outlet duct to
prevent condensation.
• Be sure to apply the air filter near the air inlet grille.
• Before connecting an inlet duct, remove the air filter, then install that filter in the
inlet grille.
[Fig. 8.0.1] (P.4)
A Air inlet
C Access door
E Canvas duct
G Connect common reference potential wire between duct-work to air conditioner
Caution:
• Outlet duct is 850 mm or more necessary to construct.
• To connect the air conditioner main body and the duct for potential equali-
zation.
• Inlet temperature sensor when an inlet duct is installed.
An inlet temperature sensor is installed on the inlet duct flange. Before con-
necting an inlet duct, this sensor must be removed and installed in the speci-
fied position.

9. Electrical wiring

Precautions on electrical wiring
Warning:
Electrical work should be done by qualified electrical engineers in accord-
ance with "local regulations" and supplied installation manuals. Special cir-
cuits should also be used. If the power circuit lacks capacity or has an instal-
lation failure, it may cause a risk of electric 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.
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. Be sure to connect between the control cable terminal block of the outdoor unit
and that of the indoor unit. (Cables have polarity, so make sure that they are
connected according to the terminal numbers.)
10. Fix power source wiring to control box by using buffer bushing for tensible force
(PG connection or the like). Connect control wiring to control terminal bed
through the knockout hole of control box using ordinary bushing.
11. Do not connect the unit in the reverse phase sequence.
If connected in the reverse phase sequence, the indoor unit will not be able to
provide sufficient cooling air. (PEA-200, 250, 400, 500)
B Air outlet
D Ceiling surface
F Keep duct-work length 850 or more
from waving. Never provide any air vent pipe. Otherwise drain may be ejected.
4. Use a hard vinyl chloride pipe VP-25 (with an external diameter of 32 mm) for
drain piping.
5. Ensure that collected pipes are 10 cm lower than the unit body's drain port.
6. Put the end of the drain piping in a position where no odor is generated.
7. Do not put the end of the drain piping in any drain where ionic gases are
generated.
[Fig. 8.0.2] (P.4)
A Inlet duct flange
C Sensor protection plate
E Inlet duct
1 Pull out the sensor, and remove the sensor fixture and protection plate. (The
protection plate must be discarded.)
2 Connect the inlet duct.
3 Drill a sensor hole (ø12.5 dia.) on the side on the duct.
4 Assemble the sensor and fixture.
• When pulling out the sensor, do not pull it by the lead wire. Doing so may result
in wire breakage.
• Before connecting the inlet duct, make sure that the sensor, its fixture and
protection plate are removed.
The sensor removed in step 1 must be re-installed in the position specified in
•
the drawing. Installation of the sensor in an incorrect position may result in
malfunction.
Mount holes for outlet duct flange and inlet duct.
[Fig. 8.0.3] (P.4)
A Inlet duct flange
B Outlet duct flange
C Top of the unit
In case of A-control wiring there is high voltage potential on the S3 terminal
caused by electrical circuit design that has no electrical insulation between
power line and communication signal line. Therefore, please turn off the main
power supply when servicing. And do not touch the S1, S2, S3 terminals
when the power is energized. If isolator should be used between indoor unit
and outdoor unit, please use 3-potes type.
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.
[Fig. 9.0.1] (P.5)
A Power supply
B Earth leakage breaker
C Circuit breaker or local switch
D LCD remote controller
E Outdoor unit
F Indoor unit
G Power cable wiring
H Indoor/Outdoor connection wiring
I Grounding
Caution:
For PEA-400, 500, make sure that refrigerant pipes and wirings be connected
from Outdoor unit No.1 to Indoor unit No.1 and Outdoor unit No.2 to Indoor
unit No.2 respectively.
Wiring from Outdoor unit No.1 must be connected to terminal bed TB4-1, and
wiring from Outdoor unit No.2 must be connected to TB4-2 in Indoor unit
control box.
Any mistakes on those connections may cause an abnormal refrigerant pipe
temperature and etc.
B Inlet temperature sensor
D Sensor fixture
11