Confirming Drain Discharge; Duct Work; Electrical Wiring - Mitsubishi Electric CITY MULTI PEFY-P20VMS-E Manuel D'installation

[Fig. 7.2.2] (P.3)
A Indoor unit
B Insulation pipe (accessory)
C Tie band (accessory)
D Visible part
E Insertion margin
F Drain hose (accessory)
G Drain pipe (O.D. ø32 PVC TUBE, field supply)
H Insulating material (field supply)
I Tie band (accessory)
J Max.180 ± 5mm
K To be gap free. The joint section of the insulation material meet must be at the top.

7.3. Confirming drain discharge

s s s s s 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 pip-
ing.

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 outlet
duct flanges and outlet ducts.
Caution:
• Keep the distance between the inlet grille and the fan over 850 mm.
If it is less than 850 mm, install a safety guard not to touch the fan.

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 install an earth leakage breaker to the power.
2. 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.
3. Ensure that there is no slack on all wire connections.
4. 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.
5. Never connect the power cable to leads for the transmission cables. Otherwise
the cables would be broken.
<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
cables
CVVS or CPEVS
Length
10
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 turn on the switch SWE on the control-
ler circuit 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.
4. After confirmation, cancel the test run mode, and turn off the main power. When
the switch SWE has been turned on, turn it off, and attach the water supply
port cover into its original position.
[Fig. 7.3.1] (P.4)
A Insert pump's end 2 to 4 cm.
B Remove the water supply port.
C About 2000 cc
D Water
E Filling port
F Screw
[Fig. 7.3.2] (P.4)
<Indoor board>
[Fig. 8.0.1] (P.4)
A Air inlet
C Access door
E Canvas duct
F Air filter
6. Be sure to connect control cables to the indoor unit, remote controller, and the
outdoor unit.
7. Put the unit to the ground on the outdoor unit side.
8. Select control cables from the conditions given in page 11 .
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
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
Less than 120 m
SWE SWE
OFF ON OFF ON
SWE SWE
OFF ON OFF ON
B Air outlet
D Ceiling surface
G Inlet grille
2
For a multi-refrigerant system
More than 120 m
All facilities
Shielding wire CVVS or CPEVS
Less than 200 m
Regardless of length