Panasonic CS-ME7CB1P Service Manual Download Page 32

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Wooden structure

Reinforced concrete

(Unit: mm)

Connecting and Insulating the Refrigerant Piping

Lay the drain piping so as to ensure drainage.

Use a locally purchased VP20 rigid PVC pipe (outer diameter ø26) for the
drain piping, and connect it to the drain port of the indoor unit using the
drain joint 7 . Coat both sides with a PVC adhesive and adhere them firmly.

Drain piping located indoors should always be insulated by wrapping with locally
purchased insulation (foamed polyethylene with a thickness of 10 mm or more).
The drain piping should have a downward gradient (1/50 or more), and should be
secured using pipe hanging equipment to avoid creating hills or traps partway.

Note that if the main unit
is not level or if the
height relative to the
ceiling surface is not
appropriate, water may
leak or condense around
the discharge vent.

Hold the half-union with a
wrench, and do not rotate
the male side.

Absolutely do not install and
extend the drain piping from the
main unit drain water outlet
horizontally or upward or raise it
20cm or more. Doing so may
result in poor drainage or cause
of drain motor failure.

Tighten the refrigerant piping using the torque
shown in the table to the right.
Cover the piping joint with piping insulation 1 and
tie the insulation firmly using two bands 2 on both
sides. Be sure to adhere the insulation closely so
that there is no gap between the main unit and the
piping insulation.
When the relative humidity inside the ceiling
(indoors) is thought to exceed 80% such as in a
new building during the rainy season or a new
reinforced concrete structure, moisture may
condense on the outer surface of the piping
insulation. In this case be sure to add further
insulation to the refrigerant piping.

Liquid side

ø6.35 (1/4")

Gas side

ø9.52 (3/8")

Pipe diameter

Tightening

torque

18N • m

(1.8 kgf • m)

42N • m

(4.2 kgf • m)

Installation Dimensions

(Unit: mm)

• Select the unit position and airflow direction so that the

cool and warm air spreads throughout the whole room.

• Secure the hanging bolts (M10, locally purchased) firmly

in the manners shown below in a location that is
capable of supporting the unit weight.

• When the ceiling materials insufficient strength, it may

be necessary to make an opening in the ceiling and add
a framework or other reinforcing structure to maintain
the levelness of the ceiling and prevent ceiling vibration.
Consult a construction or interior contractor for details.

Decorative grille

dimensions

Ceiling opening

dimensions

Hanging bolt pitch

dimensions

Main unit

dimensions

Ceiling depth

dimension

1070

460

1010

390

830

240

H185

W770

D360

190 or more

Attach the nuts and washers to the
hanging bolts, then lift up and hook
the main unit onto the hanging
fixtures.
Adjust the lower surface of the
indoor unit relative to the ceiling
surface as shown in the illustration
below.
Check the levelness using a level or
a vinyl hose filled partially with
water before tightening the nuts.

Should some obstacle prevent the drain piping from being extended
smoothly, the drain piping can be raised outside the main unit as
shown in the illustration below.

Check the drainage

Check after connecting the power supply.

Pour approximately 300 to 400 cc of water into the drain pan of the main unit.
(Pour the water from a squeeze bottle or other vessel as shown in the illustration
below.)
Press the “DRAIN TEST” switch located on the control box to start the drain
motor, and check that the water drains normally.
(The drain motor operates for approximately 5 minutes and then stops automatically.)

CAUTION

Installation Dimensions

Connecting the Drain Piping

Installing the Indoor Unit

20 cm
or less

7 cm
or less

VP20 elbow VP20 pipe

Upward
gradient
or level

Connect the VP20 elbow directly
to the main unit outlet.

Drain joint 7

Trap

No insulation