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Carrier 38AH044 38AH044-134 Specifications Page 49

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49
Table 19A — One 2-Stage Thermostat Capacity
Control for 38AH044-084 Dual-Circuit Units
*Requires units with VAV (variable air volume) factory-supplied option.
NOTE: Units have 2 independent refrigeration circuits. Circuit A is lead circuit.
Table 19B — One 2-Stage Thermostat Capacity
Control for 38AH044-084 Optional Single-Circuit Units
*Requires accessory unloader on lead 06E-265 compressor (A1).
†Requires VAV (variable air volume) factory-installed option or accessory
unloader.
Table 20 — One 2-Stage Thermostat Capacity
Control for 38AH094-134 Units
*Requires VAV (variable air volume) unit or accessory unloader(s) field
installed on circuit lead compressor. Lead compressor is identified in
Table 16, page 42.
†Requires field-installed accessory unloader on circuit lead compressor. Lead
compressor is identified in Table 16, page 42.
NOTES:
1. Temperatures calculated with the minimum number of fans operating per
circuit.
2. See Table 16, page 42, for information on lead and lag circuits.
UNIT
38AH
QUANTITY OF LOADED
COMPRESSOR CYLINDERS
SYSTEM
CAPACITY
(%)
Circuit
A
Circuit
B
Total
044
4 4 8 100
24675
40450
20225
054
4 6 10 100
26879
246*59
40442
20221
064
6 6 12 100
4 6 10 84
268*68
60648
40432
202*16
074
6 6 12 100
4 6 10 86
268*72
60643
40429
202*15
084
6 6 12 100
4 6 10 83
268*66
60650
40433
202*17
Unloader Settings
*Unloader location.
Fig. 49 — Unloader Location and Setting
Unload, psig (kPa) 56 (386)
Load, psig (kPa) 76 (524)
UNIT38AH
QUANTITY OF
LOADED CYLINDERS
SYSTEM
CAPACITY
(%)
044
8100
6 75
4 50
2 25
054
10 100
8 81
6 60
6 56
4 37
2* 19*
064
12 100
10 82
8 64
6 56
4 36
2† 18
074
12 100
10 81
8 62
6 57
4 38
2† 19
084
12 100
10 83
8 66
6 50
4 33
2† 17
UNIT
38AH
QUANTITY OF LOADED
COMPRESSOR CYLINDERS
SYSTEM
CAPACITY
(%)
Ckt A Ckt B Total
094
10 6 16 100
10 4 14 85
10 2 12 70*
10 0 10 55
808 44
606 33
404 22
104
10 12 22 100
10 10 20 91
10 8† 18 82
10 6 16 74
10 4 14 65
10 2† 12 56
10 0 10 47
808 38
606 26
404 17
2† 0 2 9†
124
12 12 24 100
12 10 22 91
12 8† 20 82*
12 6 18 77
12 4 16 68
12 2† 14 59
12 0 12 50
10 0 10 41
808 32*
606 27
404 18
202 9†
134
12 12 24 100
10 12 22 92
10 10 20 83
8* 10 18 75*
61016 67
68*14 58*
6612 50
4610 42
606 25
404 17
2* 0 2 8*
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