Specifications

PRODUCT SPECIFICATIONS Split System Heat Pump: N4H6
4 428 71 6270 01
Specifications subject to change wi thout notice.
CHARGING SUBCOOLING (TXV- TYPE EXPANSION DEVICE)
UNIT SIZE REQUIRED SUBCOOLING ° F (° C)
24 10 (5.6)
36 13 (7.2)
48 12 (6.7)
60 11 (6.1)
VAPOR LINE SIZING AND COOLING CAPACITY LOSS
Acceptable vapor line diameters provide adequate oil return to the compressor while avoiding excessive capacity loss. The suction line
diameters s hown in the chart below are acceptable for HP systems with R- 410A refrigerant:
Unit
Nominal Size
(Btuh)
Maximum
Liquid Line
Diameters
(In. OD)
Vapor Line
Diameters
(In.) OD
Cooling Capacity Loss (%)
Total Equivalent Line Length ft. (m)
Standard
Application
Long Line Application Requires Accessories
26- 50
(7.9- 15.2)
51- 80
(15.5- 24.4)
81- 100
(24.7- 30.5)
101- 125
(30.8- 38.1)
126- 150
(38.4- 45.7)
151- 175
(46.0- 50.3)
176- 200
(53.6- 60.0)
201- 225
(61.3- 68.6)
226- 250
(68.9- 76.2)
24,000 2- Stage
HP with R- 410A
3/8
5/8 0 1 1 2 3 3 4 4 5
3/4 0 1 1 1 1 1 1 1 1
36,000 2- Stage
HP with R- 410A
3/8
5/8 1 2 4 5 6 7 9 10 11
3/4 0 0 1 1 2 2 3 3 4
7/8 0 0 — — — — — — —
48,000 2- Stage
HP with R- 410A
3/8
3/4 1 2 2 3 4 5 6 7 7
7/8 0 1 1 2 2 2 3 3 4
1- 1/8 0 0 — — — — — — —
60,000 2- Stage
HP with R- 410A
3/8
3/4 1 2 4 5 6 8 9 10 11
7/8 0 1 2 2 3 4 4 5 5
1- 1/8 0 0 — — — — — — —
Standard Length = 80 ft. (24.4 m) or less total equivalent length
Applications in this area are long line. Accessories are required as shown recommended on Long Line Application Guidelines
Applications in this area may have height restrictions that limit allowable total equivalent length, when outdoor unit is below indoor unit.
— Applications in this area are not recommended due to insufficient oil return.
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
SEPARATION 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 R - 410A Refrigerant - Maximum Total Equivalent Length{
Vertical Separation ft (m) Outdoor unit BELOW indoor unit;
0- 20
(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)
24,000 2- Stage
HP with R- 410A
3/8 250* 250* 250* 250* 250* 250* 250*
36,000 2- Stage
HP with R- 410A
3/8 250* 250* 250* 250* 250* 250* 250*
48,000 2- Stage
HP with R- 410A
3/8 250* 250* 250* 250* 230 160 --
60,000 2- Stage
HP with R- 410A
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.
- - = outside acceptable range