7
4. CONNECTING THE CABLE TO THE INDOOR UNIT
Electrical Work
Electric safety regulations for the initial installation:
1. If there is a serious safety problem regarding the power
supply, the technicians should refuse to install the air
conditioner and wait until the problem is resolved.
2. Power voltage should be in the range of 90% - 110% of
rated voltage.
3. The creepage protector and main power switch with a
1.5 times capacity of Max. Current of the unit should be
installed in the power circuit.
4. Ensure the air conditioner is well grounded.
5. Connect the wire in accordance with the attached
Electrical Connection Diagram located on the panel of
the outdoor unit.
6. All wiring must comply with local and national electrical
codes and be installed by qualifi ed and skilled
electricians.
7. An individual branch circuit and single receptacle used
only for this air conditioner must be made available. See
the following table for suggested wire sizes and fuse
specifi cations:
Minimum nominal cross-sectional area
of conductors:
Rated current of
appliance (A)
Nominal cross-sectional
area (mm
2
)
>3 and
≤
6
0.75
>6 and
≤
10
1.0
>10 and
≤
16
1.5
>16 and
≤
25
2.5
NOTE:
The cable size and the current of the fuse or switch
are determined by the maximum current indicated on the
name plate which is located on the side panel of the unit.
Please refer to the name plate before selecting the cable,
fuse and switch.
Connecting the cable to the indoor unit
NOTE:
Before performing any electrical work, turn off the
main power to the system.
1. The inside and outside connecting cable can be
connected without removing the front grille.
2. The indoor power cord type is H05VV-F or H05V2V2-F,
the outdoor power cord and interconnected cord type is
H07RN-F.
3. Lift the indoor unit panel up, remove the electrical box
cover by loosening the screw.
4. Ensure the colour of wires of outdoor unit and the
terminal Nos. are the same to the indoor’s respectively
5. Wrap those cables not connected with terminals with
insulation tapes, so that they will not touch any electrical
components. Secure the cable onto the control board
with the cord clamp.
3. CONNECTIVE PIPE AND DRAINAGE INSTALLATION
Drainage
1. Run the drain hose sloping downward. Do not install the
drain hose as illustrated in the diagrams (see right).
2. When connecting an extension drain hose, insulate the
connecting part of extension drain hose with a shield
pipe. Do not let the drain hose go slack.
Connective pipe installation
1. For the left-hand and right-hand piping, remove the pipe
cover from the side panel.
2. For the rear-right-hand and rear-left-hand piping, install
the piping as shown.
3. Bundle the tubing, connecting cable and drain hose with
tape securely, evenly as shown in Figure on the right.
• The condensed water from rear of the indoor unit is
gathered in a ponding box and is piped out of room.
Do not put anything else in the box.
Electrical box
cover
Front Pane l
Terminal block of indoor unit
Term inal s on the in door unit
L
N
S
Term inals on
the o utdoo r uni t
1(L) 2(N)
S
L
N
Model A
Mo del B
P ower
s upply
Term in als on the indo or unit
L
N
S
Ter m ina ls on the o utdoo r uni t
L
N
S
CAUTION
• Connect the indoor unit fi rst, then the outdoor unit.
• Do not allow the piping to let out from the back of the
indoor unit.
• Be careful not to let the drain hose go slack.
• Heat insulate both of the auxiliary pipes.
• Ensure that the drain hose is located at the lowest
side of the bundle. Locating on the upper side can
cause drain pan to overfl ow inside the unit.
• Never intercross nor intertwist the power wire with
any other wiring.
• Run the drain hose sloped downward to drain out the
condensed water smoothly.
Indoor unit installation
1. Pass the piping through the hole in the wall.
2. Hook the indoor unit onto the upper portion of installation
plate (engage the indoor unit with the upper edge of the
installation plate). Ensure the hooks are properly seated
on the installation plate by moving it in left and right.
3. Piping can easily be made by lifting the indoor unit with a
cushioning material between the indoor unit and the wall.
Get it out after you fi nish piping.
4. Press the lower left and right side of the unit against the
installation plate until hooks engages with their slots.
E963_Lennox Split Wall Mounted Installation Manual 12pp A5 1c.indd 6-7
E963_Lennox Split Wall Mounted Installation Manual 12pp A5 1c.indd 6-7
9/12/11 11:47 AM
9/12/11 11:47 AM
