3.13 Oil Line Manifold Selection Table
OIL MANIFOLD SIZING FOR PRESSURE DROP
22
LEGEND
LPM - Litres per minute
cSt - Centistrokes
* If 170 POE oil is used, Carlyle recommends use of the next larger size copper line if pressure drop is greater
than 5.0 psi. This will typically reduce pressure drop to 30% of value shown.
NOTES:
1. Viscosity of 10 cSt is based on 130 F (54 C) oil with 10% refrigerant dilution.
2. Viscosity of 45 cSt is based on 130 F (54 C) oil, no refrigerant dilution or 80 F (27 C) oil
with 10% refrigerant dilution.
3. Viscosity of 100 cSt is based on 100 F (38 C) oil, no refrigerant dilution.
4. Viscosity of 170 cSt is based on 100 F (38 C) oil, with no refrigerant dilution.
10 Ft Manifold Length
Assumed Delta P (PSI)
Number of
Compressors
GPM LPM
Manifold
O.D. (in.)
at 10 cSt at 45 cSt at 100 cSt at 170 cSt
1 2 7.6 7/8 0.17 0.77 1.72 2.92
2 4 15.2 7/8 0.34 1.54 3.43 5.83
3 6 22.8 7/8 0.52 2.31 5.15 8.76*
4 8 30.4 1-1/8 0.22 0.97 2.16 3.67
5 10 38 1-1/8 0.27 1.21 2.69 4.58
20 Ft Manifold Length
Assumed Delta P (PSI)
Number of
Compressors
GPM LPM
Manifold
O.D. (in.)
at 10 cSt at 45 cSt at 100 cSt at 170 cSt
1 2 7.6 7/8 0.34 1.54 3.43 5.84
2 4 15.2 1-1/8 0.22 0.97 2.16 3.67*
3 6 22.8 1-1/8 0.32 1.46 3.24 5.50
4 8 30.4 1-1/8 0.43 1.94 4.31 7.33
5 10 38 1-1/8 0.54 2.43 5.39 9.17*
30 Ft Manifold Length
Assumed Delta P (PSI)
Number of
Compressors
GPM LPM
Manifold
O.D. (in.)
at 10 cSt at 45 cSt at 100 cSt at 170 cSt
1 2 7.6 1-1/8 0.15 0.70 1.62 2.75*
2 4 15.2 1-1/8 0.32 1.45 3.24 5.50
3 6 22.8 1-1/8 0.49 2.18 4.85 8.25*
4 8 30.4 1-1/8 0.65 2.91 6.47 11.00*
5 10 38 1-3/8 0.33 1.49 3.30 5.61
40 Ft Manifold Length
Assumed Delta P (PSI)
Number of
Compressors
GPM LPM
Manifold
O.D. (in.)
at 10 cSt at 45 cSt at 100 cSt at 170 cSt
1 2 7.6 1-1/8 0.25 0.91 2.42 3.67*
2 4 15.2 1-1/8 0.43 1.94 4.32 7.34*
3 6 22.8 1-1/8 0.65 2.91 6.47 11.00*
4 8 30.4 1-1/8 0.35 1.50 3.52 5.99
5 10 38 1-3/8 0.44 1.98 4.40 7.48*
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