2
2
- 13
Design of 3-WAY FLOW LOGIC
1. Model Selecting and Capacity Calculator
Refer to the graph below for the correction coefficients for Ruc and Ruh.
Indoor unit capacity correction coefficient for Ruc (cooling)
Indoor unit capacity correction coefficient for Ruh (heating)
1.0
0.9
0.8
0.7
0.6
0.5
0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0
Indoor unit capacity correction coef
ficient
Corrected indoor/outdoor capacity ratio (Ruc or Ruh)
Note:
When Ruc or Ruh is less than or equal to 1.0, the indoor unit capacity correction coefficient for both Ruc and Ruh is 1.0.
5. Graph of capacity correction coefficients
■
■
Table of correction coefficients by horsepower (1 – (1))
■
■
Graph of outdoor unit capacity characteristics (1 – (2))
■
■
Outdoor unit heating capacity correction coefficient during frosting/defrosting (1 – (4))
* To calculate the heating capacity with consideration for frosting/defrosting operation, multiply the heating capacity found from
the capacity graph by the correction coefficient from the table above.
Equivalent
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
horsepower
50 Hz
1.25 1.15 1.00 1.05 1.05 1.19 1.15 1.07 1.09 1.09
1.03 1.05 1.05 1.11 1.11 1.06 1.07 1.07 1.04
1.05
1.05
Outdoor intake air
–20
–15
–10
–8
–6
–5
–4
–2
–1
0
1
2
3
4
5
6
temp.
(°CWB RH85%)
Correction
0.97
0.97
0.97
0.96
0.94
0.91
0.89
0.87
0.87
0.87
0.88
0.89
0.91
0.92
0.95
1.0
coefficient
Outdoor unit cooling capacity
characteristics
Outdoor unit heating capacity
characteristics
Rate of cooling capacity change (%)
Rate of heating capacity change (%)
* Broken line indicates a 14, 16 HP
DC inverter unit
Outdoor air intake temp. (
°
C DB)
WB = 19
°
C
Indoor air intake temp. (
°
C DB)
15
20
25
130
120
110
100
90
80
70
60
50
40
130
120
110
100
90
80
-20 -15 -10 -5
0
5 10 15
-5 0 5 10 15 20 25 30 35 40 45
Outdoor air intake temp. (
°
C WB)
Indoor air intake temp. (WB) = 16
°
C
WB = 22
°
C
04-218 Airwell-2.qxp 01/06/2007 13:15 Page 13