Target: HP
H
P
Target: LP
Target: HP
H
P
Target: LP
Target: HP
H
P
Target: LP
Target: HP
H
P
Target: LP
Compressor rps UP
Compressor rps DOWN
Condensor capacity: UP
(Evaporator capacity: DOWN)
LP
LP
HP
HP
Targeted
(HP & LP)
Under Heat Recovery operation, the heat balance for the system is controlled based on the Target High pressure and the Target low pressure.
By changing compressor rotation speed or changing Heat exchange capacity, the system can maintain the good heat balance.
The target High pressure value and the target low pressure value in the target range are decided by the outdoor unit's operation mode (Cond-
ensor or Evaporator).
The outdoor unit's operation mode is decided by depending on the operation order from the connecting indoor unit at the first start up.
- Indoor unit's cooling demand is bigger than heating demand: Outdoor unit operates as Condensor
- Indoor unit's heating demand is bigger than cooling demand: Outdoor unit operates as Evaporator
After the mode was decided at the start up, the operation mode of outdoor unit will be selected by based on the target pressure.
Ex. When the refrigerant flow is required
Ex. When the refrigerant evaporation is required
Ex. When the refrigerant flow is not required
Ex. When the refrigerant condensation is required
2-4-1 Operation / Stop Condition
When cooling requirement capacity or heating requirement capacity from either of the indoor units in the same
refrigerant circuit is input, the compressor operates.
When all the indoor units in no "cooling requirement capacity" or "heating requirement capacity", the compressor
is stopped.
But in the following case, the compressor operates in accordance with operation of each mode.
During 3 minute restart prevention operation
Icing protection
Failure (Refer to
chapter 4, TROUBLE SHOOTING )
Under expansion valve initialization
At protective operation
Emergency stop
Defrost operation
2-4 COMPRESSOR OPERATION
Peak cut stop operation
Oil recovery
2-3-1 Operation mode selection and controlling
2-3 Heat Recovery Operation controlling
Condensor capacity: DOWN)
(Evaporator capacity: UP)
02-03
Summary of Contents for Airstage UTP-RU01AH
Page 1: ...SERVICE MANUAL 208 230V 60Hz ...
Page 5: ...1 TEST RUN ...
Page 6: ......
Page 34: ...2 OUTDOOR UNIT OPERATION CONTROL ...
Page 59: ...3 INDOOR UNIT OPERATION ...
Page 60: ......
Page 82: ......
Page 83: ...4 TROUBLE SHOOTING ...
Page 84: ......
Page 186: ...04 96 0 24 AOUA120 208 230 AOUA72 90 0 19 RED WHITE BLACK U V W ...
Page 208: ...5 APPENDING DATA UNIT ...
Page 209: ......
Page 215: ...CASSETTE TYPE MODELS AUUB18TLAV AUUB24TLAV AUUB30TLAV AUUB36TLAV 05 06 ...
Page 217: ...MEDIUM STATIC PRESSURE DUCT TYPE MODEL ARUM24TLAV 05 08 MODEL ARUM30TLAV ARUM36TLAV ...
Page 218: ...HIGH STATIC PRESSURE DUCT TYPE MODELS ARUH36TLAV ARUH48TLAV ARUH60TLAV 05 09 ...
Page 219: ...FLOOR CEILING TYPE MODELS ABUA12TLAV ABUA14TLAV ABUA18TLAV ABUA24TLAV 05 10 ...
Page 220: ...CEILING TYPE MODELS ABUA30TLAV ABUA36TLAV INDOOR UNITS INDOOR UNITS 05 11 ...
Page 221: ...WALL MOUNTED TYPE MODELS ASUA7TLAV ASUA9TLAV ASUA12TLAV ASUA14TLAV 05 12 ...
Page 222: ...MODELS ASUB18TLAV ASUB24TLAV 05 13 ...
Page 224: ...MODEL UTP RU01AH MODEL UTP RU01BH 5 2 3 RB Unit 05 15 ...
Page 225: ...MODEL UTP RU01CH 05 16 ...
Page 226: ...MODEL UTP RU04BH 05 17 ...
Page 227: ...MODELS AAUA48TLAV 5 2 4 Outdoor Air Unit 05 18 MODELS AAUA72TLAV ...
Page 228: ...MODELS AAUA96TLAV 05 19 ...
Page 230: ...6 DISASSEMBLY PROCESS ...
Page 245: ......