2-17
Design of W-2WAY ECO-i SYSTEM Unit Specifications
1
2
3
4
5
6
7
8
2. System Design
2-1. System Example
(1) Below are the tables created using the “Sanyo PAC/GHP System Diagram Software.” Details of the calculations are shown
in (2).
Outdoor
unit 1
Indoor
unit 1
Indoor
unit 2
Indoor
unit 3
Indoor
unit 4
Outdoor
unit 2
Elevation
difference: 10 m
50 m
10 m 20 m 20 m
10 m 10 m 10 m
Selection conditions
Assumes that installation is in a 50 Hz region.
Outdoor unit
Room 1
(indoor unit 1)
Room 2
(indoor unit 2)
Room 3
(indoor unit 3)
Room 4
(indoor unit 4)
Cooling
Air condition
(DB/WB)
33.0 / 22.5 26.0 / 18.0 26.0 / 18.0 26.0 / 18.0 26.0 / 18.0
Max. load (kW)
15.0 13.0 13.0 5.5
Heating
Air condition
(DB/WB)
3.0 / 2.0 21.0 / 13.0 21.0 / 13.0 21.0 / 13.0 21.0 / 13.0
Max. load (kW)
16.0 14.5 14.5 6.2
Actual tubing length 100 m 60 m 70 m 90 m 100 m
Equivalent length (with
consideration for curves, etc.)
120 m 72 m 84 m 108 m 120 m
Preliminary selection
Outdoor unit
Room 1
(indoor unit 1)
Room 2
(indoor unit 2)
Room 3
(indoor unit 3)
Room 4
(indoor unit 4)
Selected model
Type
1305+0905
Type 604 Type 484 Type 484 Type 184
Load (cooling/heating) (kW)
15.0 13.0 13.0 5.5
Rated capacity
(cooling/heating) (kW)
68.0 / 76.5 16.0 / 18.0 14.0 / 16.0 14.0 / 16.0 5.6 / 6.3
(5) Corrected capacity (cooling/
heating) (kW)
55.3 / 54.86 16.00 / 18.00 14.00 / 16.00 13.42 / 15.69 5.23 / 6.07
(7) Actual capacity
(cooling/heating) (kW)
16.00 / 17.74 14.00 / 15.77 13.42 / 15.46 5.23 / 5.98
Total corrected capacity of indoor units (cooling/heating) = 48.65/55.76
Ruc = 48.65/55.3 = 0.880 < 1 Ruh = 55.76/54.86 = 1.164 > 1
Outdoor unit changes
During heating, the corrected outdoor unit capacity is less than the total corrected capacity of all indoor units
in the system. As a result, the actual capacity of each indoor unit is less than the maximum load. Therefore the
outdoor unit is increased by one rank.
Outdoor unit
Room 1
(indoor unit 1)
Room 2
(indoor unit 2)
Room 3
(indoor unit 3)
Room 4
(indoor unit 4)
Selected model
Type 1405+0905
Type 604 Type 484 Type 484 Type 184
Maximum load
(cooling/heating) (kW)
15.0 13.0 13.0 5.5
Rated capacity
(cooling/heating) (kW)
73.0 / 81.5 16.0 / 18.0 14.0 / 16.0 14.0 / 16.0 5.6 / 6.3
(5) Corrected capacity (cooling/
heating) (kW)
59.36 / 58.45 16.00 / 18.00 14.00 / 16.00 13.42 / 15.69 5.23 / 6.07
(7) Actual capacity
(cooling/heating) (kW)
16.00 / 18.00 14.00 / 16.00 13.42 / 15.69 5.23 / 6.07
Total corrected capacity of all indoor units (cooling/heating) = 48.65/55.76
Ruc = 48.65/59.36 = 0.820 < 1 Ruh = 55.76/58.45 = 0.954 < 1
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