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5. Refrigerant piping work
A
(B)
(C)
Fig. 5-1
SUZ-SWM30VA
SUZ-SWM40/60VA2
SUZ-SHWM30/40VAH
Initial amount: 800 g
<Combination for E*SD/E*ST17D/E*ST20D> (*1)
600
480
500
385
400
290
300
195
200
100
100
0
0
5
Piping length [m]
*1. In case of connecting to E*ST30D, ALWAYS add 50 g on top of the additional charge according to the graphs.
*2. For the piping length longer than 26 m, make sure to consult with our specialist.
*3. For the piping length longer than 46 m, make sure to consult with our specialist.
*4. In case of Full recharge ; Initial + Additional charge amount
A
ø12.7
Fig. 5-2
(A)
Indoor unit
A
Outdoor unit
B
B
10
15
20
25
Indoor unit
A
Outdoor unit
B
ø6.35
B
5.1. Refrigerant pipe (Fig. 5-1)
► Check that the difference between the heights of the indoor and outdoor
units, the length of refrigerant pipe, and the number of bends in the pipe are
within the limits shown below.
Models
SUZ-SWM30VA
SUZ-SHWM30VAH
SUZ-SWM40VA2
SUZ-SHWM40VAH
SUZ-SWM60VA2
SUZ-SHWM60VAH
SUZ-SWM80VA(H)2
SUZ-SWM100VA(H)
• Height difference limitations are binding regardless of which unit, indoor or out-
door, is positioned higher.
SUZ-SHWM60VAH
SUZ-SWM80VA(H)2
SUZ-SWM100VA(H)
Initial amount: 1100 g
<Combination for E*SD/E*ST17D/E*ST20D> (*1)
600
530
500
400
400
300
270
200
140
100
100
0
0
5
7
30
(1) Table below shows the specifications of pipes commercially available. (Fig. 5-2)
Outside diameter Min. wall
Model
Pipe
For liquid
All models
For gas
(2) Ensure that the 2 refrigerant pipes are well insulated to prevent condensation.
(3) Refrigerant pipe bending radius must be 100 mm or more.
CAUTION:
Using careful insulation of specified thickness. Excessive thickness prevents
storage behind the indoor unit and smaller thickness causes dew drippage.
• Be sure to have appropriate ventilation in order to prevent ignition. Furthermore,
be sure to carry out fire prevention measures that there are no dangerous or flam-
mable objects in the surrounding area.
• R32 maintenance refilling: Before servicing refilling the equipment with R32 to
ensure that there is no risk of explosion from electrical sparks it must be ensured
that the equipment machine is 100% disconnected from the mains supply.
• The insulation materials should be satisfied the following SPECs.
(1) Heat transfer rate: 0.040 W/mK or less
(2) Insulation thickness: 9 mm or more
(3) Heat resistance: 110 °C or more
If the piping length in the outside is over 15 m, the insulation thickness should be
18 mm or more.
(A) Pipe length
(B) Height
(one way)
difference
2 m - 26 m
Max. 26 m
2 m - 46 m
Max. 30 m
10
15
20
25
30
35
Piping length [m]
Insulation
thickness
thickness
mm
inch
6.35
1/4
0.8 mm
8 mm
12.7
1/2
0.8 mm
8 mm
(C) Number of
bends (one way)
Max. of 10
en
40
45
50
Insulation
material
Heat resisting
foam plastic 0.045
specific gravity
6
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