Shaping The Tubing; Installing The Drain Hose - Panasonic S-12MU1U6 Installation Instructions Manual

3-50. Shaping the Tubing

Right-rear tubing
(1) Shape the refrigerant tubing so that it can easily go into the
hole. (Fig. 3-166)
(2) After performing a leak test, wrap both the refrigerant tubing
and drain hose together with insulating tape.
The drain hose should be positioned below the refrigerant
tubes, and should be given suffi cient space so that no strong
tension is applied to it.
(3) Push the wiring, refrigerant tubing and drain hose through the
hole in the wall. Adjust the indoor unit so it is securely seated
on the rear panel.
Left or left-rear tubing
(1) Pass the tubing and drain hose into the rear of the indoor unit.
Provide suffi cient length for the connections to be made.
Next, bend the tubing with a pipe bender, and connect them.
(Fig. 3-167)
(2) After performing a leak test, wrap the refrigerant tubing and
drain hose together with insulating tape, as shown in the fi gure
at right. (Fig. 3-168)
Then fi t the tubing into the tubing storage space in the rear of
the indoor unit and clamp in place.
(3) Adjust the indoor unit so that it is securely installed onto the
rear panel.
NOTE
It is necessary to install the external electronic expansion valve kit
for the model S-19MS1U6. For installation, refer to "3-53. External
Electronic Expansion Valve Kit (CZ-P56SVK1U)".

3-51. Installing the Drain Hose

a) The drain hose should be slanted downward to the outside.
(Fig. 3-169)
b) Never form a trap in the course of the hose.
c) If the drain hose will run in the room, insulate the hose* so that
chilled condensation will not damage furniture or fl oors.
* Foamed polyethylene or its equivalent is recommended.
WARNING
VRF_Indoor_US.indb 52 VRF_Indoor_US.indb 52
Do not supply power to the unit or
operate it until all tubing and wiring to
the outdoor unit are completed.
Rear panel tab
Plastic cover
Insulating tape
Drain hose
Indoor unit
52
Insulating
tape
Refrigerant
tubing
Indoor and
outdoor unit
connection wiring
Fig. 3-166
Insulation
Fig. 3-167
Refrigerant tubing
Rear panel
Inter-unit wiring
Fig. 3-168
Slant
Refrigerant
tubing
Fig. 3-169
2011/09/30 12:23:11 2011/09/30 12:23:11