ICP NAC048AKA1 - User Manual

This document outlines the installation, startup, and maintenance procedures for Split System Premium Line AC & HP Condensers. It emphasizes safety, proper handling, and adherence to electrical and building codes to ensure optimal performance and longevity of the unit.

Function Description

The Split System Premium Line AC & HP Condensers are outdoor units designed to work in conjunction with an indoor coil and furnace/air handler to provide heating and cooling for residential or commercial spaces. These units are precharged with refrigerant to handle a standard length of refrigerant line, with provisions for adjusting the charge for shorter or longer lines. The system utilizes a refrigerant cycle to transfer heat, either removing it from the indoor space for cooling or bringing it into the indoor space for heating (in the case of heat pumps).

For cooling operation, the condenser dissipates heat from the refrigerant to the outdoor air. For heat pump models, the unit can reverse its cycle to extract heat from the outdoor air and transfer it indoors. The system incorporates a defrost control mechanism, particularly for heat pump models, to prevent ice buildup on the outdoor coil during cold weather, ensuring efficient operation. This defrost system can be either time/temperature-based or demand-based, automatically initiating a defrost cycle when conditions warrant.

The unit's electrical system is designed for 208-230 volts, 60Hz single phase, and requires copper conductors for wiring. It includes a contactor for compressor control and, for heat pump models, a defrost control board that manages the defrost cycles and auxiliary heat. The system is designed to be grounded permanently in accordance with national and local electrical codes.

Usage Features

Installation of the condenser unit requires careful consideration of its location to minimize noise and ensure proper drainage. It should be placed on a level platform or pad, elevated above grade to prevent runoff from entering the unit. Clearances around the unit are critical for optimal airflow and serviceability, with specific recommendations for discharge air, coil intake air, and proximity to structures. Avoiding placement near fresh air intakes, bedroom windows, or areas where heat or exhaust fumes are discharged is advised to prevent disturbances.

Refrigerant line connections are made using brazing, with strict safety precautions to prevent fire hazards from refrigerant and oil mixtures. Nitrogen purging is recommended during brazing to prevent oxidation and scale formation inside the tubing. The unit comes with service valves that allow for evacuation of the refrigerant lines and indoor coil before releasing the factory charge into the system. Depending on the indoor coil match, a restrictor orifice may need to be installed or changed in the liquid line.

Startup procedures involve energizing the system, setting the thermostat, and operating the unit for a period to stabilize before checking and adjusting the refrigerant charge. For cooling-only models, the charge is typically adjusted using the superheat method, comparing actual superheat readings to recommended values based on outdoor ambient temperature. For heat pump models, both cooling and heating mode performance should be checked, with subcooling adjustment for models equipped with adjustable TXVs. Airflow across the indoor coil is a critical factor for proper system performance and should be established before making refrigerant charge adjustments.

The defrost system on heat pump models can be adjusted for time interval (for time/temperature type) or temperature termination (for demand type) to suit specific environmental conditions and ensure complete ice removal from the outdoor coil. Functional checks of the defrost cycle are also outlined to verify proper operation.

Maintenance Features

Regular maintenance is crucial for the efficient and long-term operation of the Split System Premium Line AC & HP Condensers. Key maintenance activities include:

Condensate Drain Check: During the cooling season, the condensate drain should be checked monthly to ensure free flow and cleaned if necessary to prevent blockages.
Coil Cleanliness: Maintaining free airflow around the outdoor coil is essential. This involves keeping fences, shrubs, snow drifts, and other obstructions at least two feet away from the coil air inlets. The coil should also be kept free of grass clippings, weeds, and other debris.
Coil Cleaning: When cleaning the coil, it is important to ensure the coil is cold. Only an alkaline-based cleaner should be used, as acid-based cleaners can damage the paint on the fins and potentially clog the coil. Cleaning a hot coil is also discouraged. Before any cleaning, the electrical power to the unit must be shut off to prevent electrical shock hazards.
Weather Covers: If a weather cover is used, it must be a ventilated type or made of breathable fabric that allows moisture to evaporate rapidly. Non-breathable covers can trap moisture, leading to rust buildup and damage to the unit.

These maintenance practices help ensure the unit operates efficiently, prolong its lifespan, and prevent potential issues that could lead to equipment malfunction or void the warranty.

ICP NAC048AKA1 Specifications

General

Heating Seasonal Performance Factor (HSPF)	9.0
Phase	1
Refrigerant	R-410A
Type	Air Conditioner
Cooling Capacity	48000 BTU/h
Heating Capacity	48000 BTU/h
Seasonal Energy Efficiency Ratio (SEER)	16
Voltage	208/230V