Application Guidelines

Comparison to 16 SEER 2-stage systems
This new model offers several benefits compared to two-stage systems. Below is a
comparison of the new ICP inverter variable speed model compared to the 16 SEER
two-stage model:
The chart below shows the major differences between ICP heat pump lines
ICP Inverter with Observer
®
Wall
Control
16 SEER 2-sage
SEER
Up to 19
Up to 17.5
EER
Up to 13
Up to 13.5
HSPF
Up to 11
Up to 9.5
Compressor Type
Variable speed Rotary
2-stage Scroll
Compressor
Stages
5 stages as low as 25%
2 stages as low as 70%
Line length
Up to 100ft. equivalent length
Up to 250ft equivalent length
Fan motor
Compact ECM(Brushless DC)
No module attached
Inverter driven
Standard PSC
Ambient range
Cool: 40º-115ºF communicating
(4.4º-46.1ºC)
Cool: 55º-115ºF non-communicating
(12.8-46.1ºC)
Heat: 10 - 66ºF(-12.2-18.9 ºC)
Not initially qualified for Low ambient cooling
Cool: 55º-125ºF (12.8º-51.7C)
Heat: -20 - 66 ºF(-28.9º-18.9C)
Low ambient cooling capable
with kit
Sound
56dBA-73 dBA
67dBA – 71 dBA
Basepan sizes
24, 25 and 36 sizes - 23”x23”
37, 48 and 60 sizes - 31.25” x 31.25”
35”x35” all sizes
AHRI Ratings with
Observer communicating indoor for full 5-stage
functionality with Touch Control
Observer Communicating
indoor 2-stage functionality
with Touch Control
2-stage indoor for 2-stage functionality with non-
communicating 2-stage thermostat
2-stage indoor for 2-stage
functionality with non-
communicating 2-stage
thermostat