Table 4 - Refrigerant Charge Adjustments
Liquid Line Size
Puron Charge (oz/ft)
3/8
0.60 (Factory charge for lineset = 13.5 oz (382.7)
5/16
0.40
1/4
0.27
Units are factory charged for 25 ft (7.6 m) of 3/8” liquid line. The factory charge for 3/8” lineset 9 oz (266.2 g). When using other length or
diameter liquid lines, charge adjustments are required per the chart above.
Charging Formula:
[(Lineset oz/ft x total length) – (factory charge for lineset)] = charge adjustment
Example 1:
System has 25ft of line set using existing 1/4“liquid line. What charge adjustment is required?
Formula: (.27 oz/ft x 25ft) – (13.5 oz) = -6.75 oz; (8.0 g/m x 7.6 m) – (382.7 g) = -321.9 g
Net result is to remove 6.75 oz of refrigerant from the system
Example 2:
System has 45 ft of existing 5/16” liquid line. What is the charge adjustment?
Formula: (.40 oz/ft. x 45ft) – (13.5 oz.) = 9 oz; (11.8 g/m x 13.7m) – (382.7 g) = -221.0 g
Net result is to add 4.5 oz of refrigerant to the system
LSV (Heat Pump Only)
Fig. 2 – Equal– Level Outdoor/Indoor Unit
•
A TXV with 15 to 30% bleed must be installed at indoor unit when application qualifies as long line. See Table 6.
•
Hard Start Kit (start capacitor and relay) must be installed on outdoor unit when application qualifies as long line. See Table 6.
•
A crankcase heater must be installed on compressor when t h e application qualifies as long line. See Table 6.
•
Vapor line should slope towards indoor unit.
•
Maximum actual liquid line is up to
100
(61 m). See Table 5.
•
Maximum total equivalent length is up to
120
(76.2 m). See Table 5.
•
Heat pump only – Bi- flow liquid line solenoid must be installed within 2 ft (0.61 m) of outdoor unit with arrow pointing towards
outdoor unit.
•
Heat pump o n l y – Outdoor AccuRater
TM
adjustment not required
•
Use vapor line per Tables 3.
•
Use liquid lines per Table 5.
Table 5 – Maximum Total Equivalent Length
Equal Level or Outdoor Unit Below Indoor
Size
System
Type
Liquid
Line
Diameter
w/ TXV
Maximum Total Equivalent Length**: Outdoor unit BELOW Indoor
Vertical Separation ft (m)
0 --- 5
(0 --- 1.5)
6 --- 10
(1.8 --- 3.0)
11 --- 20
(3.4 --- 6.1)
21 --- 30
(6.4 --- 9.1)
31 --- 40
(9.4 --- 12.2)
41 --- 50
(12.5 --- 15.2)
51 --- 60
(15.5 --- 18.3)
61 --- 70
(18.6 --- 21.3)
71 --- 80
(21.6 --- 24.4)
18000
AC Only
1/4
150*
150*
125
100
100
75
--- ---
--- ---
--- ---
AC Only
5/16
150*
150*
150*
150*
150*
150*
150*
150*
150
AC/HP
3/8
150*
150*
150*
150*
150*
150*
150*
150*
150*
24000
AC Only
1/4
75
75
75
50
50
--- ---
--- ---
--- ---
--- ---
AC Only
5/16
150*
150*
150*
150*
150*
150*
150*
125
100
AC/HP
3/8
150*
150*
150*
150*
150*
150*
150*
150*
150*
30000
AC Only
1/4
30
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
--- ---
AC Only
5/16
150*
125*
100
150
125
100
75
--- ---
--- ---
AC/HP
3/8
150*
150*
150*
150*
150*
150*
150*
150*
150*
36000
AC Only
5/16
150*
150*
150*
100
100
100
75
--- ---
--- ---
AC/HP
3//8
150*
150*
150*
150*
150*
150*
150*
150*
150*
48000
AC/HP
3/8
150*
150*
150*
150*
150*
150*
150*
150*
--- ---
60000
AC/HP
3/8
150*
150*
150*
150*
150*
150*
150*
--- ---
--- ---
* Maximum actual length not to exceed 1 0 0 ft
**
Total equivalent length accounts for losses due to elbows or fitting. See the Table 2 for details.
--- --- = outside acceptable range
Page 27
Summary of Contents for 38C Series
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