Carrier 38MARBQ09AA3, Руководство по обслуживанию, Страница: 22 / 116

22
Specifications subject to change without notice. SG-38MARB-01
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 25ft. (7.6 m).
For runs over 25 ft. (7.6 m), consult the long-line applications section for the proper charge adjustments.
2. The 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 6in (152 mm) vertical rise to the service valves to prevent refrigerant migration.
4. Both lines must be insulated. Use a minimum of 1/2in. (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 vibration or noise is not
transmitted into the structure.
IMPORTANT: Both refrigerant lines must be insulated separately.
Table 14 displays the following maximum lengths allowed.
Table 14 — Piping and Refrigerant Information for Cooling Only and Heat Pump Systems
• The charge amount listed in Table 14 is for piping runs up to 25 ft.
(7.6 m).
• For piping runs greater than 25 ft. (7.6 m), add refrigerant up to the
allowable length as specified in Table 15.
Long Line Applications,:
1. No change in line sizing is required.
2. Add refrigerant per Table 15.
Table 15 — Additional Charge
SYSTEM SIZE
12K 9K 12K 18K 24K 30K 36K
(115 V) (208/230 V) (208/230 V) (208/230 V) (208/230 V) (208/230 V) (208/230 V)
P
iping
Min. Piping Length ft. (m) 10 (3) 10 (3) 10 (3) 10 (3) 10 (3) 10 (3) 10 (3)
Standard Piping Length ft. (m) 25 (7.5) 25 (7.5) 25 (7.5) 25 (7.5) 25 (7.5) 25 (7.5) 25 (7.5)
Max. outdoor – indoor height
difference (OU higher than IU)
ft. (m) 33 (10) 33 (10) 33 (10) 66 (20) 82 (25) 82 (25) 98 (30)
Max. outdoor – indoor height
difference (IU higher than OU)
ft. (m) 33 (10) 33 (10) 33 (10) 66 (20) 82 (25) 82 (25) 98 (30)
Max. Piping Length with no
additional refrigerant charge per
System (Standard Piping length)
ft. (m) 25 (7.5) 25 (7.5) 25 (7.5) 25 (7.5) 25 (7.5) 25 (7.5) 25 (7.5)
Total Maximum Piping Length
per system
ft. (m) 82 (25) 82 (25) 82 (25) 98 (30) 164 (50) 164 (50) 213 (65)
Additional refrigerant charge
(between Standard – Max piping
length)
Oz/ft (g/m) 0.161(15) 0.161(15) 0.161(15) 0.161(15) 0.322(30) 0.322(30) 0.322(30)
Suction Pipe
(size – connection type)
In (mm) ø1/2” (12.7) ø3/8” (9.52) ø1/2” (12.7) ø1/2” (12.7) ø5/8” (15.9) ø5/8” (15.9) ø5/8” (15.9)
Liquid Pipe
(size – connection type)
In (mm) ø1/4” (6.35) ø1/4” (6.35) ø1/4” (6.35) ø1/4” (6.35) ø3/8” (9.52) ø3/8” (9.52) ø3/8” (9.52)
Refr
ige
rant
Refrigerant Type Type R410A R410A R410A R410A R410A R410A R410A
Charge Amount lb. (kg) 2.47(1.12) 2.6(1.18) 2.6(1.18) 4.08(1.85) 5.73(2.6) 6.06(2.75) 7.5(3.4)
Unit
Size
Total Line
Length
Additional Charge, oz/ft. ft (m)
Min Max
10-25
(3-8)
>25-82
(8-25)
>82-98
(25-30)
>98-164
(30-50)
9
10(3)
82(25)
None
0.16 12
18
98(30)
0.16
24
0.32 0.32 30
164(50) 0.32
36