Application Guidelines

Existing 1-stage indoor equipment
The ICP inverter will work with a 1-stage thermostat as a 1-stage system with
suitable indoor coil and fan until the indoor components can be upgraded to
provide full variable speed functionality.
Fan coil application – if the fan coil was built in 2006 or after, it may be straight
matched or one size larger than the outdoor unit tonnage*. If built between 2005
and 1992, the fan coil must be one size larger than the outdoor unit tonnage*. An
R410A TXV is required on the indoor coil.
Furnace coil application – if the furnace coil was built in 2006 or after, it may be
straight matched or one size larger than the outdoor unit tonnage*. If built
between 2005 and 1992, the furnace coil must be one or two sizes larger than
the outdoor unit tonnage*. An R410A TXV is required on the indoor coil.
Set airflow at 350-400 cfm/ton
Line set limitations
The ICP inverter is qualified for line sets up to 100ft equivalent length.
Lift limitations:
Outdoor above indoor: 100 ft.
Outdoor below indoor:
2 ton
3 ton
4 ton
5 ton
80ft
80ft
70ft
60ft
See Product Data for line set diameter requirements
* Examples
 Straight matched to outdoor unit tonnage- 3-ton ICP inverter with 3-ton furnace or fan coil
 One size larger indoor – 3-ton ICP Inverter with 3.5 ton furnace or fan coil
 2 sizes larger indoor – 3-ton ICP inverter with older 4 ton furnace coil