14
Table 6 – 38AUDA/B 16-25 Piping Recommendations (Two-Circuit Unit)
NOTE: 38AUDA/B units require TWO sets of refrigeration piping
R -410A
Linear Length Ft 0-25 25-50 50-75 75-100 100-125
m 0-8 8-15 15-23 23-30 30-38
Equiva lent
Length
Ft 0-38 38-75 75-113 113-150 150-188
m 0-12 12-23 23-34 34-46 46-57
Model
38AUDA/B16 Liquid Line
1
/
2
1
/
2
1
/
2
1
/
2
1
/
2
Max Lift 25 50 75 100 125
Suction Line
7
/
8
1-
1
/
8
1-
1
/
8
1-
1
/
8
1-
1
/
8
Pressure Drop (_F) 1.8 1.0 1.4 1.9 2.4
Charge e a . ( l bs)
Novati on 11.7 13.8 15.7 17.6 19.6
RTPF 21.7 23.8 25.7 27.6 29.6
38AUDA/B25 Liquid Line
1
/
2
1
/
2
1
/
2
or
5
/
8
1
/
2
or
5
/
8
1
/
2
or
5
/
8
Max Lift 25 50 54 or 75 60 or 99 46 or 95
Suction Line 1-
1
/
8
1-
1
/
8
1-
1
/
8
1-
1
/
8
or 1-
3
/
8
1-
3
/
8
Pressure Drop (_F)
(Cap Red)
0.8 1.7 2.5 3.3 or 1.2
(-2.3%)
1.5
Charge (lbs) 1
2
19.3
18.3
21.0
20.3
23.0 or 26.0
22.0 or 25.0
25.9 or 29.7
24.9 or 28.7
28.0 or 32.7
27.0 or 31.7
Legend:
Equivale nt Length Equivalent tubing length, including effects of refrigeration specialties devices
Linear Length Typical linear tubing length (50% added to linear to define Equivalent Length for this table)
Liquid Line Tubing size, inches OD.
Max Lift Maximum liquid lift (indoor unit ABOVE outdoor unit only), at maximum permitted liquid line pressure drop —
S Linear Length Less than 75 ft (23 m): Minimum 2.0° F subcooling entering TXV
S Linear Length Greater than 75 ft (23m): Minimum 0.5° F subcooling entering TXV
Suction Line Tube size, inches OD
Pressure Drop (_F) Suction Line Pressure D r op, saturated temperature, ° F
(Cap Red) Capacity Reduction caused by suction line PD greater than 2° F
Charge Charge Q uantity, lbs. Calculated for both liquid line sizes (where applicable), but only with larger suction line size (where applicable).
Charge is for each circuit. Size 25: 1 = Circuit 1, 2 = 2 Circuit 2.
NOTE: For applications with equivalent length greater than 188 ft (57 m) and/or linear length greater than 125 ft (38 m), contact your local
Carrier representative.
38AU
To Next Page
Loading...
