Refrigerant Lines; General Refrigerant Line Sizing; Piping And Refrigerant Information; Additional Charge Table - Bryant 538PAQ012RBMA Service Manual

REFRIGERANT LINES

General Refrigerant Line Sizing:

1 The outdoor units are shipped with a full charge of R410A
refrigerant. All charges, line sizing, and capacities are based
on runs of 25 ft. (7.6 m). For runs over 25 ft. (7.6 m)
consult long−line section for proper charge adjustments.
2 Minimum refrigerant line length between the indoor and
outdoor units is 10 ft. (3 m).
3 Refrigerant lines should not be buried in the ground. If it is
necessary to bury the lines, not more than 36−in (914 mm)
should be buried. Provide a minimum 6−in (152 mm)
vertical rise to the service valves to prevent refrigerant
migration.
IMPORTANT: Both refrigerant lines must be insulated separately.
Table 15 lists the maximum lengths allowed.
SYSTEM SIZE
V-Ph-Hz
Min. Piping Length
Standard Piping Length
Max. outdoor-indoor
height difference
Max. Piping Length with
no additional refrigerant
charge
Piping
Max. Piping Length
Additional refrigerant
charge (between Standard
– Max piping length)
Gas Pipe
(size - connection type)
Liquid Pipe
(size - connection type)
Refrigerant Type
Refrigerant
Charge Amount
S
The above charge is for piping runs up to 25 ft. (7.6 m).
S
For piping runs greater than 25 ft. (7.6 m), add refrigerant up to the allowable length as specified below.
S
The outdoor unit has an electronic expansion valve to manage the refrigerant flow of the connected fan coil.
Long Line Applications,:
1 No change in line sizing is required.
2 Add refrigerant per Table 16.
Total Line Length Ft (m)
Unit Size
Min.
9
12
18 10 (3)
24
30
Table 15—Piping and Refrigerant Information
9K 12K
115-1-60
ft(m) 10(3) 10(3)
ft(m) 25(7.5) 25(7.5)
ft(m) 32(10) 32(10)
ft(m) 26(8) 26(8)
ft(m) 82(25) 82(25)
Oz/ft(g/m) 0.16(15) 0.16(15)
in(mm) 3/8(9.52) 1/2(12.7)
in(mm) 1/4(6.35) 1/4(6.35)
-- R410A R410A
Lbs(kg) 2.76(1.25) 2.76(1.25)
Table 16—Additional Charge Table
10-25
Max.
(3-8)
82 (25)
None
98 (30)
164 (50)
4 Both lines must be insulated. Use a minimum of 1/2−in.
(12.7 mm) thick insulation. Closed−cell insulation is
recommended in all long−line applications.
5 Special consideration should be given to isolating
interconnecting tubing from the building structure. Isolate
the tubing so that vibration or noise is not transmitted into
the structure.
9K 12K
208/230-1-60
10(3) 10(3)
25(7.5) 25(7.5)
32(10) 32(10)
26(8) 26(8)
82(25) 82(25)
0.16(15) 0.16(15) 0.16(15)
3/8(9.52) 1/2(12.7) 1/2(12.7)
1/4(6.35) 1/4(6.35) 1/4(6.35)
R410A R410A
2.76(1.25) 2.76(1.25) 4.19(1.90)
Additional Charge, oz/ft. Ft (m)
>25-82
(8-25)
0.16
0.32
18
18K 24K 30K
10(3) 10(3) 10(3)
25(7.5) 25(7.5) 25(7.5)
65(20) 65(20) 82(25)
26(8) 26(8) 26(8)
98(30) 98(30) 164(50)
0.32(30) 0.32(30)
5/8(16) 5/8(16)
3/8(9.52) 3/8(9.52)
R410A R410A R410A
5.18(2.35) 6.62(3.00)
>82-98 >98-164
(25-30) (30-50)
0.16
0.32
0.32