Carrier 25VNA User Manual

8
REFRIGERANT PIPING LENGTH LIMITATIONS
Maximum Line Lengths:
The maximum allowable total equivalent length for heat pumps varies depending on the vertical separation. See the tables below for
allowable lengths depending on whether the outdoor unit is on the same level, above or below the outdoor unit.
MAXIMUM LINE LENGTHS FOR HEAT PUMP APPLICATIONS
MAXIMUM ACTUAL LENGTH
ft (m)
MAXIMUM EQUIVALENT LENGTH{
ft (m)
MAXIMUM VERTICAL SEPARA-
TION ft (m)
Units on equal level 200 (61) 250 (76.2) N/A
Outdoor unit ABOVE
indoor unit
200 (61) 250 (76.2) 200 (61)
Outdoor unit BELOW
indoor unit
See Table ’Maximum Total Equivalent Length: Outdoor Unit BELOW Indoor Unit’
{ Total equivalent length accounts for losses due to elbows or fitting. See the Long Line Guideline for details.
Maximum Total Equivalent Length
{
-- Outdoor Unit BELOW Indoor Unit
Size
Liquid Line
Diameter
w/ TXV
HP with Puronr Refrigerant --- Maximum Total Equivalent Length{
Ve rtical Separation ft (m) Outdoor unit BELOW indoor unit;
0 --- 2 0
(0 --- 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)
024
HP with
Puron
3/8 250* 250* 250* 250* 250* 250* 250*
036
HP with
Puron
3//8 250* 250* 250* 250* 250* 250* 250*
048
HP with
Puron
3/8 250* 250* 250* 250* 230 160 --- ---
060
HP with
Puron
3/8 250* 225* 190 150 110 --- --- --- ---
* 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.
--- --- = o u t s i d e a c c e p t a b l e r a n g e
LONG LINE APPLICATIONS
An application is considered Long Line when the refrigerant level in the system requires the use of accessories to maintain acceptable
refrigerant management for systems reliability. Defining a system as long line depends on the liquid line diameter, actual length of the tubing,
and vertical separation between the indoor and outdoor units.
For Heat Pump systems, the chart below shows when an application is considered Long Line. Beyond these lengths, long line accessories
are required:
HP WITH PURONr REFRIGERANT LONG LINE DESCRIPTION ft (m)
Beyond these lengths, long line accessories are required
Liquid Line Size Units On Same Level Outdoor Below Indoor Outdoor Above Indoor
3/8 80 (24.4) 20 (6.1) vertical or 80 (24.4) total 80 (24.4)
Note: SeeLongLineGuidelinefordetails
A11265
Fig. 6 – Long Line Application

Carrier 25VNA Specifications

General

Refrigerant	R-410A
Energy Star Certified	Yes
Stages	Variable
HSPF2	Up to 9.5
Compressor Type	Variable Speed
Cooling Capacity	2-5 tons
Heating Capacity	2-5 tons
Warranty	10-year parts limited warranty