Confirming Drain Discharge; Duct Work - Mitsubishi Electric CITY MULTI PEFY-P06NMAU-E4 Manuel D'installation

7.3. Confirming drain discharge

► Make sure that the drain-up mechanism operates normally for discharge
and that there is no water leakage from the connections.
• Be sure to confirm the above in a period of heating operation.
• Be sure to confirm the above before ceiling work is done in the case of a new
construction.
1. Remove the water supply port cover on the same side as the indoor unit piping.
2. Fill water into the feed water pump using a feed water tank. In filling, be sure to
put the end of the pump or tank in a drain pan. (If the insertion is incomplete,
water may flow over the machine.)
3. Perform the test run in cooling mode, or connect the connector to the ON side of
SWE on the Indoor controller board. (The drain pump and the fan are forced to
operate without any remote controller operation.) Make sure using a transparent
hose that drain is discharged.
SWE SWE
OFF ON OFF ON
< OFF > < ON >
4. After confirmation, cancel the test run mode, and turn off the main power. If the
connector is connected to the ON side of SWE, disconnect it and connect it to
the OFF side, and attach the water supply port cover into its original position.
SWE SWE
OFF ON OFF ON
< ON > < OFF >

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 and outlet duct to prevent condensation.
• Be sure to change the position of air filter to the position where it can be serviced.
[Fig. 8.0.1] (P.5)
<A> In case of rear inlet
<B> In case of bottom inlet
Duct
A
Access door
C
Ceiling surface
E
Leave distance enough to prevent short cycle
G
• Procedure for changing the rear inlet to the bottom inlet.
Caution:
When the duct is connected to the inlet at the bottom of the unit, the sound
pressure level will be greater by approximately 10 dB than when the duct is
connected to the inlet at the back of the unit.
For this reason, it is recommended to connect the duct to the back inlet. When
using the inlet at the bottom of the unit, offset the position of the inlet on the
indoor unit relative to the inlet on the ceiling as shown in Figures <A> and <B>
to minimize noise.
[Fig. 8.0.2] (P.5)
Filter
A
1. Remove air filter. (First remove filter lock screw.)
2. Remove the bottom plate.
3. Fit the bottom plate to the rear of the body. [Fig. 8.0.3] (P.5)
(Position of lug-holes on the plate is different from those for rear inlet.)
When the plate is attached on
the rear side, it exceeds the
height of the rear body panel.
Replicate the plate along the slit
when there is not enough room
above for the entire unit.
Screw holes are hidden under
the insulation. Screw through
the insulation to screw the plate
down.
4. Fit filter to the underside of the body.
(Be careful of which side of the filter to fit.) [Fig. 8.0.4] (P.5)
[Fig. 8.0.4] (P.5)
Nail for the bottom inlet
C
12
Air inlet
B
Canvas duct
D
Air outlet
F
Bottom plate
B
Nail for the rear inlet
D
[Fig. 7.3.1] (P.5)
Insert pump's end 2 to 4 cm [13/16 to 1-5/8 in].
A
Remove the water supply port.
B
About 2500 cc
C
Water
D
Filling port
E
Screw
F
[Fig. 7.3.2] (P.5)
<Indoor controller board>
Caution:
• To reduce the risk of injury from metal sheet edges, wear protective gloves.
• Keep the distance between the inlet grille and the fan over 850 mm
[33-1/2 in].
If it is less than 850 mm [33-1/2 in], install a safety guard not to touch the
fan.
• Install sufficient thermal insulation to prevent condensation forming on
outlet duct flanges and outlet ducts.
• To avoid electrical noise interference, do not run transmission lines at the
bottom of the unit.
• The noise from the intake will increase dramatically if intake is fitted
directly beneath the main body. Intake should therefore be installed as far
away from the main body as possible.
Particular care is required when using it with bottom inlet specifications.