SiUS28-902_a
Special Control
Function
22
3.2
Oil Return Operation
Oil discharged by the compressor to the field piping is collected by the oil return operation.
3.2.1 Oil Return Operation in Cooling Operation
[Conditions to start]
The cooling oil-returning operation is started under the following conditions:
Integrated amount of displaced oil
Timer
After the power is turned on, integrated operatingtime is 2 hours and subsequently every 8
hours.)
In addition, the integrated amount of displaced oil is derived from Tc, Te, and the
compressor load.
Outdoor unit actuator
Oil return preparation
operation
Oil return operation
Postoil-return operation
Compressor
Upper limit control
124 Hz
124 Hz
Outdoor unit fan
Fan control
Fan control
Fan control
Four-way valve
OFF
OFF
OFF
Main electronic expansion valve
(EV1)
1400 pls
1400 pls
1400 pls
Subcooling electronic expansion
valve (EV2)
SH control
0 pls
0 pls
Hot gas bypass valve (SVP)
OFF
ON
ON
Receiver gas discharging valve
(SVG)
OFF
OFF
OFF
Ending conditions
20 sec.
•
6 min.
•
Ts - Te<5
3 min.
or
Indoor unit actuator
Cooling oil return operation
Fan
Thermostat ON unit
Set Air Volume
Stopping unit
OFF
Thermostat OFF unit
OFF
Electronic expansion valve
Thermostat ON unit
Normal opening
Stopping unit
200 pls
Thermostat OFF unit
200 pls
Содержание SkyAir FCQ18PVJU
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