Lennox Y6760 Service Manual Download Page 34

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Installation and Maintenance

Service Manual

gas pipe

Liquid pipe

Liquid

valve

gas valve

Union nut

Pipe joint

3. Connect Indoor and Outdoor Pipes

(1) Remove the screw on the right handle and valve cover (only
for 18K unit) of outdoor unit and then remove the handle and
valve cover (only for 18K unit).(As show in Fig.20)
(2) Remove the screw cap of valve and aim the pipe joint at the
bellmouth of pipe.(As show in Fig.21)

(3) Pretightening the union nut with hand.
(4) Tighten the union nut with torque wrench .

Fig.21

(1) After tightening the screw, pull the power cord slightly to
check if it is firm.
(2) Never cut the power connection wire to prolong or shorten
the distance.

Note:

(2) Fix the power connection wire with wire clip.

Fig.22

handle

Note: the wiring board is for reference only,

please refer to the actual one.

Wire clip

Wiring board Grounding

wire

(1)

(1) Take sufficient protective measures when installing the
outdoor unit.
(2) Make sure the support can withstand at least four times the
unit weight.
(3) The outdoor unit should be installed at least 3cm above the
floor in order to install drain joint.(As show in Fig.18)
(4) For the unit with cooling capacity of 2300W~5000W, 6
expansion screws are needed; for the unit with cooling capacity
of 6000W~8000W, 8 expansion screws are needed; for the
unit with cooling capacity of 10000W~16000W, 10 expansion
screws are needed.

Note:

At least 3cm above the floor

8.6 Installation of Outdoor Unit

1. Fix the Support of Outdoor Unit(Select it according to

the actual installation situation)

(1) Select installation location according to the house structure.
(2) Fix the support of outdoor unit on the selected location with
expansion screws.

2. Fix Outdoor Unit

(1) Place the outdoor unit on the support.
(2) Fix the foot holes of outdoor unit with bolts.
(As show in Fig.19)

Fig.18

Foot holes

Fig.19

Fig.20

4. Connect Outdoor Electric Wire

(1) Remove the wire clip; connect the power connection wire
to the wiring terminal according to the color; fix the power
connection wire with screws.(As show in Fig.22)

Hex nut diameter(mm) Tightening torque(N m)

Φ6

15~20

Φ9.52

30~40

Φ12

45~55

Φ16

60~65

Φ19

70~75

Refer to the following table for wrench moment of force

U-shaped curve

Wall

Drain hose

The drain hos

can't raise

upwards

5. Neaten the Pipes

(1) The pipes should be placed along the wall, bent reasonably
and hidden possibly. Min. semidiameter of bending the pipe is
10cm.
(2) If the outdoor unit is higher than the wall hole, you must set
a U-shaped curve in the pipe before pipe goes into the room,
in order to prevent rain from getting into the room.(As show in
Fig.23)

Fig.23

Fig.24

(1) The through-wall height of drain hose shouldn't be higher
than the outlet pipe hole of indoor unit.(As show in Fig.24)
(2) Slant the drain hose slightly downwards. The drain hose
can't be curved, raised and fluctuant, etc.(As show in Fig.25)

Note:

Handle

Screw

Valve cover

N(1)

blue black

(brown)

yellow-

green

Indoor unit connection

LM009CO-100T432-1

LM012CO-100T432-1