Indoor Unit Changes - Sanyo SPW-C0705DZH8 Technical Data Manual

2. System Design

Indoor unit changes

The indoor unit in room 4, where the corrected indoor unit capacity is less than the maximum load, is
increased by one rank.
Selected model
Maximum load
(cooling/heating) (kW)
Rated capacity
(cooling/heating) (kW)
(5) Corrected capacity
(cooling/heating) (kW)
(7) Actual capacity
(cooling/heating) (kW)
Total corrected capacity of all indoor units (cooling/heating) = 50.24/57.4
Ruc = 50.24/59.36 = 0.846 < 1
• For both cooling and heating in all rooms, actual capacity is now greater than or equal to the maximum
load. Selection is completed.
(2) Calculate the final selection results according to the capacity calculation procedure.
[From calculation of the correction coefficient to calculation of actual capacity]
Rated capacity (kW)
(1) Model
(2) Temp. condition
(3) Tubing length,
elevation difference
(4) Frosting/defrosting
Result of (2) × (3)
Correction coefficient
applied to indoor unit *1
(5) Corrected capacity (kW) *2
(6) Correction coefficient
for corrected capacity
ratio
(7) Actual capacity (kW)
*1: This varies depending on the values of (2) and (2) × (Distribution ratio in (3)).
*2: Corrected outdoor unit capacity = Rated outdoor unit capacity × (1) × (2) × (3) × (4)
The actual capacity is calculated as shown below.
Cooling: Ruc = (16.0 + 14.0 + 13.42 + 6.82) / 59.36 = 0.846 < 1
Therefore,
Actual cooling capacity of each indoor unit = Corrected cooling capacity of each indoor unit
(In other words, the correction coefficient [6] for the corrected capacity ratio is 1.)
Heating: Ruh = (18.0 + 16.0 + 15.69 + 7.71) / 58.45 = 0.982 < 1
Therefore,
Actual heating capacity of each indoor unit = Corrected heating capacity of each indoor unit × (0.1 × Ruh + 0.9) / Ruh
(In other words, the correction coefficient (6) for the corrected capacity ratio is (0.1 × Ruh + 0.9) / Ruh.)
Room 1
Outdoor unit
(indoor unit 1) (indoor unit 2) (indoor unit 3) (indoor unit 4)
Type 230 Type 60
15.0 / 16.5
73.0 / 81.5 16.0 / 18.0
59.36 / 58.45 16.00 / 18.00 14.00 / 16.00
16.00 / 18.00 14.00 / 16.00
Ruh = 57.4/58.45 = 0.982 < 1
Room 1
Outdoor unit
(indoor unit 1) (indoor unit 2) (indoor unit 3) (indoor unit 4)
73.0 / 81.5 16.0 / 18.0
1.00 / 1.00
1.019 / 0.941 0.934 / 0.964
0.798 / 0.856 1.105 / 1.070
0.89
1.032 / 1.031 1.008 / 1.014 0.958 / 0.981
1.03 / 1.03
59.36 / 58.45 16.00 / 18.00
16.00 / 18.00
Room 2 Room 3
Type 48 Type 48
13.0 / 14.5 13.0 / 14.5
14.0 / 16.0 14.0 / 16.0
13.42 / 15.69
13.42 / 15.69
(Cooling/heating)
Room 2 Room 3
14.0 / 16.0 14.0 / 16.0
0.934 / 0.964 0.934 / 0.964
1.079 / 1.052 1.026 / 1.018
1.01 / 1.01 0.96 / 0.98
14.00 / 16.00 13.42 / 15.69
1.00 / 1.00
14.00 / 16.00 13.42 / 15.69
2-19
Design of 3-WAY ECO-i SYSTEM
Room 4
Type 25
5.5 / 6.2
7.30 / 8.00
6.82 / 7.71
6.82 / 7.71
Room 4
7.30 / 8.00
0.934 / 0.964
1.00 / 1.00
0.934 / 0.964
0.93 / 0.96
6.82 / 7.71
6.82 / 7.71
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