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This document describes the York GY9 series of gas-fired, high-efficiency, condensing downflow/horizontal furnaces, designed for residential and commercial heating applications. These furnaces are engineered for compact installations in various indoor settings such as basements, closets, alcoves, recreation rooms, or garages, provided the ambient temperature is above 32°F.
The GY9 furnaces are Category IV appliances, meaning they are highly efficient and operate with a condensing design. They are designed to provide reliable and economical heating by utilizing natural gas as fuel. The units can be vented either through a side wall or a roof, using approved plastic type combustion air and vent piping, offering flexibility in installation. Each unit is factory assembled, wired, and tested to ensure dependable operation and ease of installation.
The heating process begins with an electronic hot surface ignition system, which saves fuel costs and enhances reliability compared to traditional pilot lights. An induced combustion system, coupled with inshot main burners, ensures quiet and efficient operation. The primary heat exchanger is constructed from high-tech tubular aluminized steel, while the secondary (condensing) heat exchanger is made from 29-4C high-grade stainless steel, contributing to the unit's high efficiency and durability.
A 100% shut-off main gas valve is incorporated for extra safety, preventing gas flow in case of a malfunction. The furnace includes a PSC (Permanent Split Capacitor) four-speed, direct-drive motor that powers a large, quiet blower, circulating heated air throughout the space. For cooling applications, a 24V, 40 VA control transformer and blower relay are supplied, allowing for the integration of an add-on cooling system. The blower-off delay feature is designed to improve the Seasonal Energy Efficiency Ratio (SEER) of the cooling system by continuing to circulate air after the compressor shuts off, maximizing the use of residual cool air.
The integrated control module manages the furnace's operations, ensuring reliable and economical performance. It also features built-in, high-level self-diagnostics with a fault code display, which simplifies troubleshooting and maintenance by indicating specific issues. The unit's low amp requirement makes it suitable for easy replacement applications, as it may not require extensive electrical upgrades.
The GY9 furnaces offer significant flexibility in installation due to their compact design and ideal 40-inch cabinet height. They can be installed as either a two-pipe (sealed combustion) system, drawing all combustion air from outside, or a single-pipe vent system, utilizing indoor combustion air. The top intake and vent connections facilitate downflow installation in narrow spaces, making these units versatile for various architectural layouts.
The design eliminates the need for a special vent termination kit, simplifying the venting process. The timed-on and adjustable-off blower capability allows for customization to maximize comfort, ensuring that the blower operates for an optimal duration after the burner shuts off to distribute residual heat.
For enhanced safety and operational integrity, the furnace includes protection mechanisms against intake, exhaust, or condensate blockage. This ensures that the unit operates safely and efficiently, preventing potential hazards or performance degradation due to obstructions in the air or vent pathways.
Maintenance of the GY9 furnaces is designed to be straightforward and user-friendly. Easy tool-less access from the front of the unit allows for quick and convenient cleaning, routine maintenance, and servicing. This accessibility reduces the time and effort required for technicians to perform necessary checks and repairs.
The built-in, high-level self-diagnostics with a fault code display are a key maintenance feature. When an issue arises, the control module displays a specific fault code, enabling technicians to quickly identify the problem area without extensive diagnostic procedures. This significantly reduces troubleshooting time and helps in resolving issues efficiently.
A high-velocity filter is provided for field installation, which helps in maintaining indoor air quality by trapping dust and other particulates. Regular replacement or cleaning of this filter is a simple maintenance task that contributes to the longevity and efficiency of the furnace, as well as the overall air quality in the conditioned space. The condensate neutralizer kit is an optional accessory that helps protect the drain line from acidic condensate, reducing corrosion and extending the life of the drainage system. This kit uses calcium carbonate refill media, which is easily replaceable.
Optional accessories such as the propane (LP) conversion kit allow for adaptation to different fuel sources, providing flexibility for installations where natural gas is not available. This conversion must be performed by qualified personnel. The concentric vent termination kit offers a cleaner installation by allowing combustion air to enter and exhaust to exit through a single common hole, eliminating unsightly elbows.
Overall, the York GY9 series furnaces are designed for efficient, reliable, and user-friendly operation with features that simplify both installation and ongoing maintenance.
General| AFUE Rating | Up to 96% |
|---|---|
| Ignition Type | Hot Surface Ignition |
| Fuel Type | Natural Gas |
| Efficiency | Up to 96% |
| Blower Motor | ECM |
| Heating Capacity | 40, 000 - 120, 000 BTU/h |
| Heat Exchanger | Stainless Steel |
| Vent Diameter | 2" to 3" |
| Warranty | 10-year limited warranty on heat exchanger |
