[
VII
Control ]
- 148 -
HWE09080
GB
-10- Capacity Control of Heat Exchanger<PQRY>
(1) Control method
Depending on the capacity required, the rotation speed of the heat source unit fan is controlled by the inverter to keep a con-
stant condensing temperature of (water tempe10°C [50°F]) during cooling operation and a constant evaporation tem-
perature of (0°C [32°F] =0.71 <Pa [103psi]) during heating operation.
The OS in the multiple-heat source-unit system operates at the actual heat source unit fan control value that is calculated by
the OS based on the preliminary heat source unit fan control value that the OC determines.
(2) Heat source unit heat exchanger capacity control patterns
Model
Operation
mode
Operation
pattern
Solenoid valve
SV4a
SV4b
SV4d
SV7a
SV7b
P72 - P120 models
Cooling-main
1
ON
OFF
ON
ON
ON
2
ON
OFF
ON
OFF
ON
3
ON
OFF
ON
ON
OFF
4
ON
OFF
ON
OFF
OFF
5
ON
ON
ON
ON
ON
6
ON
ON
ON
OFF
ON
7
ON
ON
ON
ON
OFF
8
ON
ON
ON
OFF
OFF
Cooling-only
Cooling-main
9
ON
OFF
OFF
ON
ON
10
ON
OFF
OFF
OFF
ON
11
ON
OFF
OFF
ON
OFF
12
ON
OFF
OFF
OFF
OFF
13
ON
ON
OFF
ON
ON
14
ON
ON
OFF
OFF
ON
15
ON
ON
OFF
ON
OFF
16
ON
ON
OFF
OFF
OFF
Heating-only
Heating-main
1
ON
OFF
ON
ON
ON
2
ON
OFF
ON
OFF
ON
3
ON
OFF
ON
ON
OFF
4
ON
OFF
ON
OFF
OFF
5
ON
ON
ON
ON
ON
6
ON
ON
ON
OFF
ON
7
ON
ON
ON
ON
OFF
8
ON
ON
ON
OFF
OFF
9
ON
OFF
OFF
ON
ON
10
ON
OFF
OFF
OFF
ON
11
ON
OFF
OFF
ON
OFF
12
ON
ON
OFF
ON
ON
13
ON
ON
OFF
OFF
ON
14
ON
ON
OFF
ON
OFF
15
ON
ON
OFF
OFF
OFF
Содержание PQHY-P120THMU-A
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Страница 102: ... III Heat source Unit Components 93 HWE09080 GB 2 RELAY BOARD RELAY 4 board 3 RELAY BOARD RELAY 10 board ...
Страница 103: ... 94 III Heat source Unit Components GB HWE09080 ...
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Страница 113: ... 104 IV Remote Controller GB HWE09080 ...
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Страница 130: ... 121 HWE09080 GB VI Refrigerant Circuit 1 Refrigerant Circuit Diagram 123 2 Principal Parts and Functions 126 ...
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Страница 143: ... 134 VI Refrigerant Circuit GB HWE09080 ...
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Страница 181: ... 172 VII Control GB HWE09080 ...
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Страница 366: ... 357 HWE09080 GB X LED Monitor Display on the Heat source Unit Board 1 How to Read the LED on the Service Monitor 359 ...
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