Toshiba R410A, Быстрая справка

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34
Note 1 : Criteria for the difference between suction and discharge temperatures
(1) Individual cooling operation
After operating for a minimum of 30 minutes in “COOL” mode, if the
Δ
T dry bulb temperature difference between
suction and discharge air of the indoor unit is 46.4°F (8°C) or more, it is normal.
(2) Individual heating operation
After operating for a minimum of 30 minutes in “HEAT” mode, if the
Δ
T dry bulb temperature difference between
suction and discharge air of the indoor unit is 59°F(15°C) or more, it is normal.
* If demand from the indoor unit on the outdoor unit is low because the difference between the temperature set by
the remote controller and the temperature of the room is small, then the
Δ
T temperature difference is small.
* Consider that
Δ
T temperature difference may diminish in cases of a system in which the connected indoor unit
capacity exceeds the outdoor unit capacity, the pipe length is long, or a large difference exists among outdoor
units.
Note 2 : Criteria for operating power current
The table below shows the maximum current for each outdoor unit. Under standard conditions, operating current is
about 80% of the value shown in the table below.
Outdoor unit
current valve
MMY-MAP
(A)
0724FT9UL
34
0964FT9UL
50
1204FT9UL 0724FT6UL 0964FT6UL 1204FT6UL
52 19 28 30
Model
MMY-MAP
Operating
mode
Pressure (psi) Pipe surface temperature (˚F) Number of compressor rotations (rps)*
Indoor
fan
Air temperature
condition
(DB/WB)(˚F)
Pd Ps
Discharge
(TD)
Suction 1
(TS1)
Suction 2
(TS2)
Indoor
heat
exchanger
(TC)
Outdoor
heat
exchanger
(TE)
Liquid
temperature
(TL)
Compressor
1
Compressor
2
Compressor
3
Indoor Outdoor
0724FT9UL
/ 0724FT6UL
All cooling
All heating
All cooling
All heating
All cooling
All heating
410
428
415
430
421
435
130
102
130
102
130
100
183
184
184
186
186
184
82
39
83
37
84
37
59
40
60
38
60
39
48
100
48
100
50
101
105
38
105
36
105
36
102
90
102
91
102
91
50
50
45
50
50
57
50
50
45
50
50
57
—
—
45
50
50
57
High
High
High
High
High
High
80/67
70/—
80/67
70/—
80/67
70/—
95/—
47/43
95/—
47/43
95/—
47/43
0964FT9UL
/ 0964FT6UL
1144FT9UL
/ 1144FT6UL
Operating mode All cooling
Indoor temp.
Outdoor temp.
Pressure
Pd
Ps
(˚F)
(˚F)
(psi)
(psi)
64 – 90
77 – 95
290 – 465
75 – 135
All heating
59 – 77
41 – 50
365 – 475
70 – 110
Note 3 : Criteria for cycle status
(1) These data are based on operating a 4-way Cassette type air conditioner of 100% connection with standard
piping length.
Data may vary depending on temperature conditions, installed pipe length, and room shape combinations, or
indoor unit connection capacity.
For pressure criteria in different temperature conditions, refer to (2).
* This compressor is driven with a 4-pole motor. The value of the compressor frequency (rps) measured with a
clamp meter at the compressor lead line is two times the rotation count (rps) of the compressor.
* Each compressor may have a different frequency as a measure against resonance.
* The temperature of the indoor heat exchanger (TC) indicates TCJ sensor temperature when cooling, and TC2
sensor temperature when heating, respectively.
(2) Criteria for operating pressure
* Criteria after 15 minutes or more has passed since operating started.
(3) On rotations of outdoor fans
Outdoor fans may rotate slowly to control pressure when cooling with low outer air temperature or heating with
excessive load. For control content, also refer to items in Section 5, “Control Outline: Outdoor Unit,
Outdoor Fan Control (SERVICE MANUAL File No. A13-002)”.