LENNOX EL18KCV Smart Wi-Fi Communicating Thermostat User Manual
TXV USAGE
TXV SUBSTITUTION - R-454B
A general guide for replacing the factory installed R-454B TXV
if the indoor unit (coil/air handler) is larger or smaller than the
outdoor unit.
All Lennox coils and air handlers are shipped with a
factory installed TXV. In most cases, no substitution is
needed.
If a different size TXV is required, it will be listed in the
“TXV SUBSTITUTION” table by size. The correct TXV
must be ordered separately and field installed.
Outdoor Unit
Indoor Unit
Indoor
TXV
Furnished Replacement
Indoor
TXV
Size
Tons
Size
Tons
024
024
024
024
024
024
036
036
036
036
036
036
048
048
048
060
060
2
2
2
2
2
2
3
3
3
3
3
3
4
4
4
5
5
42
48
3.5
4
26Z71
26Z71
26Z71
26Z71
26Z71
26Z72
26Z71
26Z71
26Z71
26Z71
26Z71
26Z72
26Z70
26Z70
26Z72
26Z71
26Z71
26Z70
26Z70
26Z70
26Z70
26Z70
26Z70
26Z70
26Z70
26Z70
26Z70
26Z70
26Z70
26Z71
26Z71
26Z71
26Z72
26Z72
Size
024
036
048
060
Order Number
26Z70
49
4
26Z70
50/60
51/61
60
4/5
4/5
5
26Z71
26Z72
42
3.5
4
48
49
4
AHRI STANDARD 210/240-2023
50/60
51/61
60
4/5
4/5
5
Standard Ratings relating to cooling or heating capacities
shall be net values, including the effects of circulating-fan
heat, but not including supplementary electric heat. Power
input used for calculating efficiency shall be the Total
Power.
Standard Ratings of units which do not have indoor air-
circulating fans furnished as part of the model, i.e., Coil-
only System, shall be established by subtracting from the
total cooling capacity 1,505 Btu/h per 1,000 SCFM, and by
adding the same amount to the heating capacity for non-
mobile-home, non-Space Constrained units. Total Power
for both heating and cooling shall be increased by 441 W
per 1,000 SCFM of indoor air circulated.
30/36
36
2.5/3
3
60
5
50/60
51/61
4/5
4/5
TXV Ranges:
26Z70 - 1.5 to 3 ton systems - Use on 3 ton (036) and lower
systems.
26Z71 - 3.5-4 ton systems - Use on 4 ton (048) and down to
3.5 ton (042) systems.
26Z72 - 5 ton systems - Use on 5 ton (060) systems only.
| General | Details |
|---|---|
| Name | LENNOX EL18KCV Smart Wi-Fi Communicating Thermostat User Manual |
| Make | Lennox |
| Language | English |
| Filetype | PDF (Download) |
| File size | 2.82 MB |
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