Refrigerant Piping Length Limitations; Refrigerant Charge Adjustments - Carrier 24APA7 Performance Product Data
Performance 17 2-stage air conditioner with puron refrigerant 2 to 5 tons
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Also See for 24APA7 Performance:
- Installation instructions manual (13 pages) ,
- Wiring diagram (2 pages)
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REFRIGERANT PIPING LENGTH LIMITATIONS
Liquid Line Sizing
and Maximum Total Equivalent Lengths
The maximum allowable length of a residential split system depends on the liquid line diameter and vertical separation between indoor and
outdoor units.
See Table below for liquid line sizing and maximum lengths :
Liquid
Line
Liquid Line
Size
Diam.
Connection
w/TXV
1/4
024
AC with
5/16
3/8
Puron
3/8
036
5/16
AC with
3/8
3/8
Puron
048
AC with
3/8
3/8
Puron
060
AC with
3/8
3/8
Puron
* Maximum actual length not to exceed 200 ft (61 m)
{ Total equivalent length accounts for losses due to elbows or fitting. See the Long Line Guideline for details.
--- --- = outside acceptable range
Liquid
Line
Liquid Line
Size
Diam.
Connection
w/TXV
1/4
024
AC with
3/8
5/16
Puron
3/8
036
5/16
AC with
3/8
3/8
Puron
048
AC with
3/8
3/8
Puron
060
AC with
3/8
3/8
Puron
* Maximum actual length not to exceed 200 ft (61 m)
{ Total equivalent length accounts for losses due to elbows or fitting. See the Long Line Guideline for details.
Units are factory charged for 15 ft (4.6 m) of 3/8" liquid line. The factory charge for 3/8" lineset 9 oz.(266.16 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 15 ft of line set using existing 1/4" liquid line. What charge adjustment is required?
Formula:
(.27 oz/ft x 15ft) – (9 oz) = (-4.95) oz.
Net result is to remove 4.95 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) – (9 oz.) = 9 oz.
Net result is to add 9 oz of refrigerant to the system
Maximum Total Equivalent Length
Outdoor Unit BELOW Indoor Unit
AC with Puron Refrigerant Maximum Total Equivalent Length{: Outdoor unit BELOW Indoor
0--- 5
6--- 10
11--- 20
(0--- 1.5)
(1.8--- 3.0)
(3.4--- 6.1)
75
75
75
250*
250*
250*
250*
250*
250*
175
150
150
250*
250*
250*
250*
250*
250*
250*
250*
250*
Maximum Total Equivalent Length
Outdoor Unit ABOVE Indoor Unit
AC with Puron Refrigerant Maximum Total Equivalent Length{: Outdoor unit ABOVE Indoor
25
26--- 50
(7.6)
(7.9--- 15.2)
100
125
250*
250*
250*
250*
225*
250*
250*
250*
250*
250*
250*
250*
REFRIGERANT CHARGE ADJUSTMENTS
Liquid Line Size
3/8
5/16
1/4
{
for Cooling Only Systems with Puronr Refrigerant
Vertical Separation ft (m)
21--- 30
31--- 40
41--- 50
(6.4--- 9.1)
(9.4--- 12.2)
(12.5--- 15.2)
50
50
--- ---
250*
250*
225*
250*
250*
250*
100
100
100
250*
250*
250*
250*
250*
250*
225*
190
150
Vertical Separation ft (m)
51--- 75
76--- 100
101--- 125
(15.5--- 22.9)
(23.2--- 30.5)
(30.8--- 38.1)
175
200
225*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
Puron Charge oz/ft (g/m)
0.60 (17.74)
(Factory charge for lineset = 9 oz / 266.16 g)
0.40 (11.83)
0.27 (7.98)
3
:
51--- 60
61--- 70
71--- 80
(15.5--- 18.3)
(18.6--- 21.3)
(21.6--- 24.4)
--- ---
--- ---
--- ---
175
125
100
250*
250*
250*
75
--- ---
--- ---
250*
250*
250*
230
160
--- ---
110
--- ---
--- ---
126--- 150
151--- 175
176--- 200
(38.4--- 45.7)
(46.0--- 53.3)
(53.6--- 61.0)
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
250*
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