Carrier 38AU 16 Series - Page 9

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Table 7 — 38AUZ_16/25 Piping Recommendations (Single-Circuit)
MODEL &
NOMINAL
CAPACITY
LINEAR LINE (FT) 0 - 24 25 - 49 50 - 74 75 - 99 100 - 124 125 - 149 150 - 174 175 - 200
EQUIV. LINE (FT) 0 - 37 38 - 74 75 - 112 113 - 149 150 - 187 188 - 224 225 - 262 263 - 300
38AUZ_16
TC 185.7,
SC 18.4°F
Liquid Line Size (in.) 5/8 5/8 5/8 5/8 5/8 5/8 5/8 3/4 5/8 3/4
Liquid PD (F) 0.7 1.3 2.0 2.7 3.4 4.0 4.7 2.5 5.4 2.8
Max Lift (ft) 25 50 75 100 125 150 153 175 145 175
Max Lift PD (F) 2.8 5.65 8.5 11.3 14.1 16.9 17.9 17.5 17.9 17.9
Suction Line Size (in.) 1-3/8 1-3/8 1-3/8 1-3/8 1-3/8 1-5/8 1-3/8 1-5/8 1-3/8 1-5/8 1-3/8 1-5/8
Suction Line PD (F)
(Cap Red)
1.4 1.0 1.5 2.0
2 . 5
(–0.9%)
1.1
3
(–1.8%)
1.3
3 . 5
(–2.7%)
1.5
4
(–3.6%)
1.7
Charge (lb) 35.1 38.1 41.2 44.2 47.3 48.4 50.4 51.7 53.4 63.7 56.5 68.3
#/TR 2.9 3.11 3.36 3.61 3.86 3.95 4.11 4.22 4.36 5.20 4.61 5.57
38AUZ_25
TC 233.3,
SC 13.0°F
Liquid Line Size (in.) 5/8 5/8 5/8 5/8 5/8 3/4 5/8 3/4 5/8 3/4 5/8 3/4
Liquid PD (F) 1.1 2.1 3.2 4.3 5.4 2.8 6.4 3.3 7.5 3.9 8.6 4.4
Max Lift (ft) 25 50 93 98 85 116 71 108 59 102 46 95
Max Lift PD (F) 3.2 6.4 9.6 12.5 12.5 12.5 12.4 12.5 12.5 12.5 12.5 12.5
Suction Line Size (in.) 1-3/8 1-3/8 1-3/8 1-5/8 1-3/8 1-5/8 1-3/8 1-5/8 1-5/8 2-1/8 1-5/8 2-1/8 1-5/8 2-1/8
Suction Line PD (F)
(Cap Red)
0.8 1.6
2 . 4
(–0.8%)
1.0
3 . 3 .
(–2.2%)
1.4
4
(–3.6%)
1.7 2.0 0.4
2 . 4
(–0.7%)
0.5
2 . 7
(–1.2%)
0.6
Charge (lb) 31.1 34.1 37.2 37.9 40.2 41.1 43.3 50.7 47.7 58.5 51.0 63.6 54.3 68.7
#/TR 2.52 2.77 3.02 3.07 3.26 3.34 3.51 4.11 3.87 4.75 4.13 5.16 4.40 5.57
LEGEND
#/TR — Charge to unit capacity ratio, lb per ton (at 45°F SST, 95°F OAT)
Cap Red — Capacity reduction caused by suction line pressure drop > 2°F
Liquid PD (F) — Liquid line pressure drop, saturated temperature, °F
Max Lift — Maximum liquid lift (Indoor unit ABOVE outdoor unit only), at maximum permitted pressure drop.
Max Lift PD (F) — Pressure drop including Maximum liquid lift value
SC — Sub-cooling, °F (at liquid line valve)
Suction Line PD (F) — Suction line pressure drop, saturated temperature, °F
TC — Total Capacity, MBH (at 45°F Saturated suction, 95°F outdoor air temperature)