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Items
Unit Types
–
–
m
kg
A
V
Pulse
Indoor : PFD-P250VM-A
Outdoor : PUD-P250YMF-C
✕
1
Indoor : PFD-P500VM-A
Outdoor : PUD-P250YMF-C
✕
2
27 / 19
Indoor
Outdoor
35 / 24
1
1
250
7.5
11.4
✕
1 refrigerant circuit
500
11.4
✕
2 refrigerant circuit
380 / 400 / 415
36.1 / 34.3 / 33.0
360
132
200
2.15 / 0.65
97
42
15.8
18.8
21.8
10.6
75
27
16.6
26
20.8
0.23
Conditions
Pressure
Temperature of Various Parts of the Unit
LEV
Opening
Ambient Air
Temperature
˚CDB
˚CWB
quantity
Indoor
Unit
Indoor
Unit
Outdoor
Unit
Piping
Total Piping Length
Refrigerant Volume
Electric Current
Voltage
Indoor Unit
SC (LEV1)
Discharge (TH1)
Heat Exchanger Outlet (TH5)
Accumulator Inlet
Accumulator Outlet
Compressor Inlet
Low-Pressure 2-phase
Temperature (TH2)
Compressor shell bottom
SC heat exchanger outlet (TH7)
Bypass Outlet (TH8)
LEV Inlet
Heat Exchanger Outlet
Refrigerant Composition Detection
Value (
α
OC)
Oil Return (SLEV)
High Pressure (after O/S)
Low Pressure (before MA)
MPa
˚C
No. of Units Connected
No. of Units in Operation
Model Type
4
4
Standard Operation (reference data)
[1] Cooling Operation
[2] Operation under Other Conditions
(1) Changes in Circulating
Generally, circulating composition
α
OC increases in response to an increase in excess refrigerant amount
in the accumulator, since
α
OC increases when indoor operation load of the indoor unit is small or when
outdoor temperature is low.
α
OC is considered normal when it is within the range listed in Note 2. in chapter XI (Circulating Refrigerant
Composition Analysis)
α
OC being within this range, there will not be a problem with lack of operation
capacity.
(2) Change in Indoor Unit Operation Load
Compressor frequency changes while high pressure and low pressure remain nearly constant. Compressor
frequency changes in proportion to indoor operation load.
(3) Changes in Outdoor Air Temperature
Compressor frequency changes while high pressure and low pressure remain nearly constant.
During a cooling operation, the lower the outdoor temperature, the smaller compressor frequency.
