Carrier 30RQS039, Installation, Operation And Maintenance Instructions

Page: 52 / 56

52
20.8 - Refrigerant volume
The unit must be operated in cooling mode to find out, if the
unit charge is correct, by checking the actual subcooling.
Following a small refrigerant leak a loss of refrigerant,
compared to the initial charge will be noticeable in the
cooling mode and affect the subcooling value obtained at
the air heat exchanger (condenser) outlet, but it will not be
noticeable in the heating mode.
IMPORTANT: It is therefore not possible to optimise the
refrigerant charge in the heating mode after a leak. The unit
must be operated in the cooling mode to check, if an
additional charge is required.
20.9 - Characteristics of R-410A
Saturated temperatures (°C) based on the relative pressure (in kPa)
Saturat.
temp.
Relative
pressure
Saturat.
temp.
Relative
pressure
Saturat.
temp.
Relative
pressure
Saturat.
temp.
Relative
pressure
-20
297
4
807 28 1687
52
3088
-19 312 5
835
29 1734 53 3161
-18 328
6
864
30
1781
54 3234
-17
345
7 894
31
1830
55 3310
-16 361
8 924
32
1880
56
3386
-15
379
9
956
33
1930 57
3464
-14
397
10
987
34
1981 58
3543
-13 415 11 1020 35 2034 59 3624
-12 434 12 1053 36
2087
60 3706
-11 453 13
1087 37
2142 61
3789
-10 473 14 1121
38 2197
62
3874
-9
493
15 1156 39 2253 63
3961
-8
514 16
1192
40 2311 64
4049
-7
535
17 1229
41
2369
65
4138
-6 557
18
1267 42
2429
66
4229
-5
579
19 1305 43
2490 67
4322
-4 602 20 1344 44 2551
68
4416
-3 626 21
1384
45 2614 69 4512
-2 650 22 1425 46
2678 70
4610
-1 674 23 1467
47
2744
0 700 24
1509 48 2810
1 726 26
1596
49
2878
2 752 25 1552 50
2947
3
779 27
1641 51 3017
Aquasnap units use high-pressure R-410A refrigerant (the unit
operating pressure is above 40 bar, the pressure at 35°C air
temperature is 50% higher than for R-22). Special equipment
must be used when working on the refrigerant circuit
(pressure gauge, charge transfer, etc.).