Sanyo Mini ECO-i SPW-ASR74GXH56(A/B) Installation Instructions Manual page 16

05-194 5/27/05 5:06 PM
Example:
Main tube of unit
1st branch
Unit distribution tube
Example of each tubing length
Main tubing
LA = 40 m
LB = 5 m
LC = 5 m
LD = 15 m
Obtain charge amount for each tubing size
Note that the charge amounts per 1 meter are different for each liquid tubing size.
φ9.52 →
LA + LB + LC + LD
φ6.35 → 1 + 2 + 3 + 4 + 5 : 23 m × 0.026 kg/m = 0.598 kg
Additional refrigerant charge amount is 4.238 kg.
CAUTION
Checking of limit density
Density limit is determined on the basis of the size of a
room using an indoor unit of minimum capacity. For
instance, when an indoor unit is used in a room (floor
× ceiling height 2.7 m = room volume
area 7.43 m 2
20.06 m 3 ), the graph at right shows that the minimum
room volume should be 14.1 m
refrigerant of 4.238 kg. Accordingly, openings such as
louvers are required for this room.
<Determination by calculation>
Overall refrigerant charge amount for the air conditioner: kg
(Minimum room volume for indoor unit: m
4.238 (kg) + 3.5 (kg)
=
3
20.06 (m )
Therefore, openings such as louvers are required for
this room.
Page 16
LA
LB LC
2
1
model 74 model 94
Distribution joint tubing
Indoor side
1 = 5 m 4 = 6 m
2 = 5 m 5 = 5 m
3 = 2 m
: 65 m × 0.056 kg/m = 3.64 kg
Be sure to check the limit densi-
ty for the room in which the
indoor unit is installed.
3 (floor area 5.2 m
3
) ≥ 0.3 (kg/m
= 0.39 (kg/m 3 3 )
L1
L2
LN
n
3
n–1
model 124 model 164
Total 4.238 kg
3
m
40
108.0
35
94.5
2
m
30
81.0
67.5 25
2 ) for
20
54.0
15
40.5
10
27.0
13.5 5
0
0
)
16
model 184
Range below the
density limit
of 0.3 kg/m 3
(countermeasures
not needed)
Range above
the density limit
3
of 0.3 kg/m
(countermeasures
needed)
10 20 30
Total amount of refrigerant
kg