APPLICATION DATA
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Model: RCUE300AG1, RCUE330AG1
Compressor Load
Ambient
Temperature
Performance
10%
(*)
25~100%
Full Load
Capacity
%
12
30
40
50
60
70
80
90
100
Input
%
14
35
38
43
48
56
67
80
100
35°C
COP
%
86
86
105
116
125
125
119
113
100
Capacity
%
13
32
40
50
60
70
80
90
100
106
Input
%
13
32
34
38
42
50
57
67
83
94
30°C
COP
%
100
100
118
132
143
140
140
134
120
113
Capacity
%
13
34
40
50
60
70
80
90
100
112
Input
%
12
29
30
34
37
42
50
59
70
88
25°C
COP
%
117
117
133
147
162
167
160
153
143
127
Capacity
%
14
35
40
50
60
70
80
90
100
110
120
Input
%
4
26
28
30
32
36
42
50
57
67
80
20°C
COP
%
135
135
143
167
188
194
190
180
175
164
150
: Standard Condition (Ambient: 35°C, Water Inlet/Outlet: 12/7°C, Full Load)
NOTE:
1. Capacity: Cooling Capacity (kW)
Input:
Total Input Power (Comp Fans) (kW)
COP:
Capacity/Input (kW/kW)
2. Operating Conditions:
Chilled Water Outlet Temperature:
7°C
Water Flow Rate:
Constant
Condenser Fan:
All Fans Running
3. Above Table shows the percentage of Capacity, Input and COP
based on the standard condition.
Therefore, each value can be calculated as below example:
Example: Model RCUE100AG1
Standard Condition
Ambient: 30°C, Capacity 70%
Capacity:
246 kW
Capacity:
246 × 0.7 = 172 kW
Input:
84.2 kW
Input:
84.2 × 0.5 = 42.1 kW
COP:
2.92
COP:
2.92 × 1.4 = 4.09 kW
4. Control marked (*) is available by the optional selection switch.
DSW7-3 / ON: Minimum Load Extension.
16.3.
ETHYLENE GLYCOL APPLICATION
"
Low Ambient Application
Under the condition where the ambient temperature is low
in winter, there is a case where the unit and piping will
become damaged by freezing during the shutdown periods.
To prevent freezing, it is effective to operate the pump.
This Chiller has the pump ON/OFF operation control to
avoid freezing. This control become available by
connecting Pump Operation circuit. (See Wiring Diagram).
Additionally, in a case where measures such as water
raining are difficult, utilise antifreeze mixture of ethylene
glycol.
Below table shows the ethylene glycol percentage
suggested for the different temperature values.
The table also shows the correction factors, since unit with
antifreeze mixture have a slight different performance
compared with no glycol.
Example:
−
Cooling Capacity with ethylene glycol = Kc × Cooling
Capacity without ethylene glycol
−
Input Power, Flow Rate and Pressure Drop is calculated
in the same way as Cooling Capacity
(Water Outlet Temperature: 5 ~ 15°C)
Minimum Ambient
Temperature
°C
-3
-7
-13
-22
Required Ethylene Glycol
Percentage
wt%
10
20
30
40
Cooling Capacity Correction
Factor
Kc
0.99 0.98 0.97 0.96
Input Power Correction Factor
Ki
1.00 0.99 0.99 0.98
Flow Rate Correction Factor
Kf
1.00 1.01 1.04 1.08
Pressure Drop Correction
Factor
Kp
1.04 1.11 1.18 1.29
"
Low Water Temperature Application (Option)
When utilising water less than 5 °C, antifreezing mixture of
ethylene glycol shall be input to the water system.
Low water temperature Option is categorised 3 level
depending on water outlet temperature.
Therefore, please specify the level when ordering .
Freeze Protection Thermostat has been set in the factory.
Table shows Required Ethylene Glycol percentage for each
category.
