Application Guidelines

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ICP Inverter Heat Pump Application Guideline

The ICP Inverter variable speed heat pump provides a flexible alternative to high-priced

variable speed systems on the market today, as well as a competitive option compared

to 2-stage products currently being offered. Its highly efficient, smaller and lighter design

offers many benefits to dealers and homeowners alike. This document outlines the

recommended application guidelines and differences from other products.

Overview

The ICP inverter is an inverter-driven variable speed heat pump designed for the ducted

residential market. Its size and weight advantage makes it easier for dealers to handle

and stock, and allows for high-efficiency installations in tighter spaces than previously

possible. It is designed to complement the dealer’s product offering by adding a variable

speed option to compete in this expanding market.

Benefits of Variable Speed

Variable speed systems provide several benefits to the homeowner. The wide capacity

range of the system allows it to more closely match the home’s needs as conditions

change. This increases indoor comfort by running longer comfort cycles at lower speeds

thus eliminating up and down temperature swings. Longer cycles at lower speeds also

translate into higher efficiency, and lower overall sound levels both indoors and outside.

The wide capacity range also improves zoning and dehumidification capability

compared to 2-stage and 1 stage systems.

Summary of content (9 pages)

PAGE 1
ICP Inverter Heat Pump Application Guideline The ICP Inverter variable speed heat pump provides a flexible alternative to high-priced variable speed systems on the market today, as well as a competitive option compared to 2-stage products currently being offered. Its highly efficient, smaller and lighter design offers many benefits to dealers and homeowners alike. This document outlines the recommended application guidelines and differences from other products.
PAGE 2
Comparison to 16 SEER 2-stage systems This new model offers several benefits compared to two-stage systems.
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ICP Inverter System Matching This heat pump unit provides the most customer benefit and highest efficiency when installed as a complete Observer® Communicating system including Observer Control. Acceptable system combinations will be listed in the AHRI directory and in the online ratings database, accessible through the Go websites. For increased system flexibility, and increased replacement opportunities, this outdoor unit is also designed to work with standard non-communicating thermostat inputs.
PAGE 4
For dual fuel systems, the furnace must have a suitable blower size. Indoor coils built in 2006 or newer may be straight matched to the outdoor unit tonnage or one size larger*. An R410A refrigerant TXV is required on the indoor coil. Indoor coils built between 2005 and 1992 must be one or two tonnage sizes larger than the outdoor unit tonnage*. An R410A TXV must be added to the indoor coil.
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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*.
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Sound The ICP inverter variable speed heat pump adjusts its operating speed through 5 available stages. The operating stage will depend on the load demand of the home as well as outdoor temperature. The operating sound can vary significantly between cooling to heating modes; from as low as 56 dBA in minimum cooling stage to 73 dBA in maximum heating stage. The unit will operate at low stages the majority of the time and increases to maximum speed only at cold outdoor temperatures.
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Another sound that may be heard by customers is the equalization of pressures during the off-cycle. This unit contains a pressure equalizer valve that is designed to allow easier starting of the rotary compressor (see Figure 1 below). It will energize in the offcycle to equalize pressure across the compressor. A hissing sound may be heard during this process. This sound is normal, but the customer should be made aware to avoid nuisance callbacks. Figure 1.
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EER Rating vs. Equipment payback The published EER rating represents efficiency of cooling products at peak load, or 95ºF (35ºC). This rating is driven by utility companies that are concerned with power consumption at peak demand periods. In most locations, peak load is experienced for a very short time during a year (see charts below). The even-size ICP inverter units are designed for high efficiency at lower load conditions, which represents the vast majority of the cooling season.
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ICP Inverter Heat Pump System Matching with Existing Indoor Equipment   Multi-Stage Fan Coil     Multi-Stage or Single Stage Fan Coil? Single-Stage Fan Coil 2006 – Present       2006-Present or 1992-2005? Fan Coil Multi-Stage or Single Stage Fan Coil? 19922005 Single-Stage Fan Coil  Backward Compatible to any Observer Capable furnace Wi-Fi Observer Control with Version 5.