Carrier 38C Series - Page 29

Fig. 4 – Outdoor Unit Above Indoor Unit
• A TXV with 15 to 30% bleed must be installed at indoor unit when the application qualifies as long line. See Table 11.
• A crankcase heater must be installed on compressor when the application qualifies as long line. See Table 11.
• Hard Start Kit (start capacitor and relay) must be installed in outdoor unit when the application qualifies as long line. See Table 11.
• Heat pump only – Heating piston must be changed as shown in Table 12.
• Maximum actual liquid line length is up to 200 ft (61 m). See Table 10.
• Maximum total equivalent length is up to 250 ft (61 m). See Table 10.
• Heat p
ump only – Bi- flow liquid line solenoid must be installed within 2 ft (0.61 m) of outdoor unit with arrow pointing towards outdoor unit.
• Use vapor line sizes per Tables 3.
• Use liquid lines per Table 10.
• Vapor line traps are not required.
Table 10 - Puron Refrigerant Maximum Total Equivalent Length Outdoor Unit ABOVE Indoor Unit
Size
System
Ty
pe
Liquid
Line
Diameter
Vertical Separation ft (m) Outdoor unit ABOVE indoor unit
25
(7.6)
26
--- 50
(7.9 --- 15. 2)
51
--- 75
(15.5 --- 22. 9)
76
--- 100
(23.2 --- 30. 5)
101
--- 125
(30.8 --- 38. 1)
18000
AC
Only 1/4 150* 150* 150* 150* 150*
AC Only 5/16 150* 150* 150* 150* 150*
AC/HP 3/8 150* 150* 150* 150* 150*
24000
AC Only
1/4 100 125 150* 150* 150*
AC Only 5/16 150* 150* 150* 150* 150*
AC/HP 3/8 150* 150* 150* 150* 150*
30000
AC Only
1/4 30 --- --- --- --- --- --- --- ---
AC Only 5/16 150* 150* 150* 150* 150*
AC/HP 3/8 150* 150* 150* 150* 150*
36000
AC Only
5/16 150* 150* 150* 150* 150*
AC/HP 3/8 150* 150* 150* 150* 150*
48000
AC/HP
3/8
150*
150* 150* 150* 150*
60000
AC/HP
3/8
150*
150* 150* 150* 150*
* M a x imum Actual Length Not to Exceed 200ft (61 m)
Table 11 - AC / HP with Puron® Refrigerant Long Line Description ft (m)
Beyond these lengths, long line accessories are required
AC
AC Liquid Line Size Outdoor Above I n door
1/4 175 (53.3)
5/16 120 (36.6)
3/8 80 (24.4)
HP
AC Liquid Line
Size Outdoor Above I n door
3/8 80 (24.4)
Table 12 - Heat Pump Outdoor Piston Change - Outdoor Unit ABOVE Indoor Unit
Btuh
Vertical Separation ft (m) --- Outdoor Above Indoor
U nit
20 --- 25
(6.1 --- 7. 6)
26
--- 50
(7.9 --- 15. 2)
51
--- 75
(15.5 --- 22. 9)
76
--- 100
(23.2 --- 30. 5)
101
--- 125
(30.8 --- 38. 1)
126
--- 150
(38.4 --- 45. 7)
151
--- 175
(46.0 --- 53. 3)
176
--- 200
(53.6 --- 61. 0)
18,000 +1 +1 +2 +3 +3 +4 +5 +6
24,000 +1 +1 +2 +3 +4 +5 +6 +7
30,000 +1 +2 +2 +4 +5 +6 +8 +9
36,000 +1 +2 +2 +4 +5 +6 +8 +9
42,000 +1 +2 +3 +4 +5 +7 +8 +10
48,000 +1 +2 +3 +4 +5 +7 +9 +10
60,000 +1 +2 +3 +5 +6 +8 +10 +12
Page 29