Special Control
SiEBE18-526
62
Function
3.2
Oil Return Operation
Oil flown from the compressor to the side of system is collected by oil-returning operation, in
case of that oil in the compressor runs down.
3.2.1 Oil Return Operation in Cooling Operation
[Conditions to start]
The cooling oil-returning operation is started referring following conditions.
Integrated amount of displaced oil
Timer
(After the power is turned on, integrated operating-time is 2 hours and subsequently every 8
hours.)
In addition, integrated amount of displaced oil is derived from Tc, Te, and the compressor
load.
Outdoor unit actuator
Oil return preparation
operation
Oil return operation
Post-oil-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)
2000 pls
2000 pls
2000 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 actuator
Cooling oil return operation
Indoor unit fan
Thermostat ON unit
Set Air Volume
Stopping unit
OFF
Thermostat OFF unit
Set Air Volume
BP unit electronic expansion
valve
Thermostat ON unit
SH control
Stopping unit
56 pls
Thermostat OFF unit
SH control
Summary of Contents for Super Multi Plus D-Series
Page 1: ...SiEBE18 526 D Series Service Manual Applied Models zSuper Multi Plus Heat Pump...
Page 12: ...SiEBE18 526 List of Functions 1 Part 1 List of Functions 1 List of Functions 2...
Page 63: ...Refrigerant Flow for Each Operation Mode SiEBE18 526 52 Refrigerant Circuit...
Page 249: ...Instruction SiEBE18 526 238 System Configuration...
