Midea MCA30HRN1, Installation Manual

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Drill a hole in the wall (suitable just for the size of the wall conduit, 53, 71 series diameter is 90mm,
and 120,105,140 series diameter is 105 in general), then set on the fittings such as the wall
conduit and its cover.
Bind the connecting pipe and the cables together tightly with binding tapes. Do not let air in, which
will cause water leakage by condensation.
Pass the bound connecting pipe through the wall conduit from outside. Be careful of the pipe alloc-
ation to do no damage to the tubing.
2. Locate The Pipes
3. Connect the pipes.
4. Then, open the stem of stop values of the outdoor unit to make the refrigerant pipe connec-
ting the indoor unit with the outdoor unit in fluent flow.
5. Be sure of no leakage by checking it with leak detector or soap water.
6. Cover the joint of the connecting pipe to the indoor unit with the soundproof / insulating
sheath (fittings), and bind it well with the tapes to prevent leakage.
Ф
Ф
Use the market brass pipe
Be sure to use the same insulating materials when you buy the brass pipe (more than 9mm thick).
Flaring
90
Lean crude burr
Chart 22 Chart 23
1. Cut a pipe with a pipe cutter.
2. Insert a flare nut into a pipe and flare
the pipe.
Fasten the nuts
Put the connecting tubing at the proper position,
wrench the nuts with hands, then fasten it with a
wrench.( Refer to Chart24)
CAUTIONS
Too large torque will harm the bellmouthing
and too small will cause leakage. Please
determine the torque according to Table 2.
10
Chart 24
Capacity
LENGTH(L)
Less than 8m (one-way)
Added Refrigerant When Over 8m(one-way)
Table 3
Please record and reserve well the refrigerant stow capacity of your air conditioner for later maintenance.
Necessary Refrigerant Stow Capacity
65g (L-8)m
×
A(mm)
Max Min
6.35
8.3
9.53
12.4
12.7
15.8
16
19.0
19
23.3
Outside-diameter
(mm)
8.3
12.0
15.4
18.6
22.9
(kg)
6.35
φ
1420~1720 N cm
.
(144~176kgf cm)
.
φ
9.53 3270~3990 N cm
.
(333~407kgf cm)
.
φ
12.7 4950~6030 N cm
.
(504~616kgf cm)
.
φ
16 6 6180~7540 N cm
.
(630~770kgf cm)
.
φ
19 9 9720~11860 N cm
.
(990~1210kgf cm)
.
Tubing Size Torque
Table 2
18000-24000Btu/h 30000-48000Btu/h