Compressor Oil Level Adjustment; Capacity Losses - Rheem A17 Series Installation Instructions Manual

4.4 Refrigerant Line Set Selection (cont.)
4.4.5.6 Compressor Oil Level
Adjustment for Long Line Set
Applications
Additional oil may need to be added for long line set
applications. (Ref. Table 2). Below is the equation for
the oil level adjustment. The compressor name plate
oil charge for the different outdoor units is shown in
the table to the right.
Oil to be Added = [(Charge Adjustment + OD Unit
Name Plate Charge (oz.)) × (0.022) – [(0.10) ×
(Compressor Name Plate Oil Charge (oz.))]
Example: An application requires 125 ft. of line set
with a liquid line diameter of 3/8", Charge Adjustment
= 52.4 oz., Name Plate Charge = 107 oz., Name Plate
Oil Charge = 25 oz., Oil to be Added = ((52.4 oz. +107
oz.) × .022) – (.10 × 25 oz.) = 1.0 oz.
Model
Compressor
Number
(-)A1724 ZPS20K5E-PFV-130
(-)A1736 ZPS30K5E-PFV-130
(-)A1748 ZPS40K5E-PFV-130
(-)A1760 ZPS49K5E-PFV-130
Name Plate Oil Factory
Charge oz [ml] Installed CCH
25 [739] N
25 [739] Y
42 [1242] Y
42 [1242] Y
4.0 INSTALLATION

4.4.5.7 Capacity Losses

Long line lengths can result in a reduction in capacity
due to vapor line pressure drop and heat gain or loss.
Refer to Table 2 for capacity loss multipliers for vari-
ous vapor line diameters and lengths. Only use vapor
lines listed in Table 2 to assure proper oil return. This
table does not account for any capacity loss due to
heat gain or loss from the environment. It is extremely
important not to oversize the vapor line to minimize
capacity loss at the expense of proper oil return. If the
table shows an "NR" for a particular vapor line diame-
ter and length, capacity loss will be excessive. The full
length of the vapor line must be insulated to minimize
heat gain or loss.
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