Explain Unit Function

035-18843-000-A-0402

If the furnace continues to lock out, a qualified service technician should be called to determine the cause of the problem.

ELECTRICAL SHOCK, FIRE OR EXPLOSION HAZARD

Failure to follow safety warnings exactly could result in dangerous operation, serious injury, death or prop- erty damage.

Improper servicing could result in dangerous opera- tion, serious injury, death or property damage.

•Before servicing, disconnect all electrical power to furnace.

•When servicing controls, label all wires prior to disconnecting. Reconnect wires correctly.

•Verify proper operation after servicing.

PRIOR TO ANY OF THE FOLLOWING MAINTE- NANCE PROCEDURES, SHUT OFF ALL POWER TO THE UNIT, TO AVOID PERSONAL INJURY.

When the system is functioning properly, show the owner the location of all disconnect switches and the thermostat. Explain how to start and stop the unit and how to adjust temperature settings within the limitations of the system. Advise that the flue exhaust hood sur- face and the immediate area will experience high tem- peratures during the heating cycle, and that all unauthorized personnel and debris must be kept away from this area.

GENERAL MAINTENANCE

In order to insure long and trouble free service from your system, we recommend periodic inspection, cleaning, lubrication and adjustment by your installing Dealer/Contractor. Be sure to ask about this service. For those who prefer to do-it-yourself, please follow the instructions listed below to care for your system.

Snow or debris should not be allowed to accumulate in or around the unit. Do not permit overhanging struc- tures or shrubs to obstruct outdoor air discharge, com-

bustion air inlets or vent outlets on your unit. These provide air for combustion and ventilation. Adequate air is important to the safe and proper operation of the unit.

HEATING SYSTEM INSPECTION

It is the owner's responsibility to insure that an annual inspection of the entire heating portion of the unit is made by a qualified service technician. This should include inspection of the burner, heating element and flue for any corrosion or soot accumulation which may require cleaning and also checking of burner and con- trols for proper operation.

In addition, at least once during the heating season, the owner shall make a visual inspection of the flue out- let for evidence of black soot or blockage of flue outlet by leaves or other debris. If any soot is found, it is rec- ommended a qualified service technician be called immediately. If any blockage is found, it must be cleared immediately.

Check for obvious signs of deterioration of the unit. Check that the return and supply ducts attached to the unit are sound and air tight. Check that the unit's physi- cal support, concrete slab or roof curb, is sound and not in need of repair. Make sure there are no gaps between the roof curb and the unit where rain could leak into the building.

Start the furnace. The vent motor should start, the igniter will start to spark and ignite the pilot flame. After a short delay the main burner should ignite. If it does not, contact a qualified service technician for assis- tance. Check the appearance of the main burner flame. Adjust burner shutters so no yellow flame is observed in the heat exchanger tubes. (See Figure 3.) If flame adjustment cannot be made, obtain the assistance of a qualified service technician and refer to the PILOT CHECKOUT and BURNER AIR SHUTTER ADJUST- MENT sections in the UNIT INSTALLATION INSTRUC- TION.

FIGURE 3: TYPICAL FLAME APPEARANCE

BURNER AND PILOT CHECK

Periodically (at least annually at the beginning of each heating season) make a visual check of the pilot and main burner flame. If necessary, adjust main burner pri-

4	Unitary Products Group

035-18843-000-a-0402 specifications

York 035-18843-000-a-0402 is a cutting-edge HVAC unit that has gained recognition for its innovative engineering and energy efficiency. Designed for both commercial and residential application, this unit stands out due to its balanced blend of performance, reliability, and advanced technology.

One of the main features of the York 035-18843-000-a-0402 is its high-efficiency cooling and heating capabilities. With a SEER (Seasonal Energy Efficiency Ratio) rating that exceeds industry standards, the unit significantly reduces energy consumption while delivering optimal climate control. This makes it an ideal choice for environmentally conscious consumers looking to lower their carbon footprint.

Integrating advanced inverter technology, the York unit provides variable-speed operation that adjusts output based on real-time cooling or heating demand. This not only enhances comfort but also maximizes energy savings, as it consumes less energy during off-peak conditions. The quiet operation of the system due to well-engineered sound attenuation technologies ensures minimal disruption in home or business environments.

The York 035-18843-000-a-0402 is equipped with smart connectivity features, allowing users to remotely monitor and control their HVAC system via smartphone applications. This connectivity supports efficient scheduling, real-time diagnostics, and alerts on performance issues, enabling proactive maintenance and reducing unexpected repair costs.

An essential characteristic of this unit is its durable construction. Designed to withstand various weather conditions, the robust materials used in its design ensure longevity and performance durability. The unit is also equipped with a high-quality air filtration system that significantly improves indoor air quality by capturing dust, allergens, and pollutants.

In terms of installation, the York 035-18843-000-a-0402 is designed for easy integration into existing systems, facilitating smoother retrofitting and replacement projects. Its compact size allows for versatile placement, making it a suitable option even in limited spaces.

Overall, the York 035-18843-000-a-0402 represents a significant advancement in heating and cooling technology. With its impressive efficiency, integrated smart features, and commitment to durability, it meets the demands of modern consumers seeking effective climate control solutions while being conscious of their energy use and environmental impact.