Explain Unit Function, General Maintenance

66441-YUM-D-1011

If the furnace continues to lock out, a qualified service techni- cian 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 dan- gerous operation, serious injury, death or property damage.

Improper servicing could result in dangerous operation, serious injury, death or property damage.

•Before servicing, disconnect all electrical power to fur- nace.

•When servicing controls, label all wires prior to discon- necting. Reconnect wires correctly.

•Verify proper operation after servicing.

Prior to any of the following maintenance procedures, shut off all power to the unit, to avoid personal injury.

EXPLAIN UNIT FUNCTION

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 tem- perature settings within the limitations of the system. Advise that the flue exhaust hood surface and the immediate area will experience high temperatures 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 sys- tem, 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-your- self, 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 structures or shrubs to obstruct outdoor air discharge, combustion air inlets or vent outlets on your unit. These provide air for com-

bustion 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 inspec- tion of the entire heating portion of the unit is made by a qual- ified 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 controls for proper operation.

In addition, at least once during the heating season, the owner shall make a visual inspection of the flue outlet for evi- dence of black soot or blockage of flue outlet by leaves or other debris. If any soot is found, it is recommended a quali- fied 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 physical 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 ser- vice technician for assistance. 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 quali- fied service technician and refer to the PILOT CHECKOUT and BURNER AIR SHUTTER ADJUSTMENT sections in the

UNIT INSTALLATION INSTRUCTION.

FIGURE 3 - TYPICAL FLAME APPEARANCE

BURNER AND PILOT CHECK

Periodically (at least annually at the beginning of each heat- ing season) make a visual check of the pilot and main burner flame. If necessary, adjust main burner primary air shutters to give a distinct, sharp blue flame as explained under BURNER AIR SHUTTER ADJUSTMENT. If it is not possible to adjust for the proper flame, the burners may need cleaning.

4	Johnson Controls Unitary Products

66441-YUM-D-1011 specifications

The York 66441-YUM-D-1011 is a robust and efficient air conditioning unit that combines cutting-edge technology with reliability to cater to the cooling needs of both residential and commercial spaces. This model stands out for its innovative features that enhance performance, energy efficiency, and user convenience, making it a popular choice in the HVAC market.

One of the primary features of the York 66441-YUM-D-1011 is its impressive cooling capacity. Designed to effortlessly maintain comfortable indoor climates even in extreme heat, this unit varies in capacity options to suit diverse applications. Its efficiency is further bolstered by a high energy efficiency ratio (EER) rating, allowing it to deliver optimal cooling while minimizing energy consumption, which in turn leads to reduced utility bills.

The unit is equipped with advanced inverter technology that allows for variable speed operation. This feature provides precise temperature control, enabling the system to adjust output based on current cooling demands. The inverter technology reduces wear and tear on the compressor, ensuring longer operational life while delivering quieter performance—a significant advantage for both home and office environments.

Additionally, the York 66441-YUM-D-1011 is built with an environmentally friendly refrigerant, which meets modern regulatory standards and reduces the overall carbon footprint of the system. This commitment to sustainability is reflected in the design, where eco-friendly materials are used throughout its construction without compromising performance.

User convenience is a hallmark of the York model, featuring an intuitive digital thermostat and smart home compatibility, allowing users to control their unit remotely via smartphone apps. This capability enables effortless adjustment of temperature settings and program scheduling, increasing overall convenience and ensuring optimal indoor comfort.

The unit's design includes a durable and corrosion-resistant cabinet, ensuring longevity and reliability even in harsh environmental conditions. Maintenance is simplified through easy-access panels, making routine upkeep straightforward for users.

Overall, the York 66441-YUM-D-1011 is a superior air conditioning unit that combines efficiency, durability, and advanced technology, making it an excellent investment for those seeking reliable climate control solutions. Whether for residential use or commercial applications, this model embodies the ideal balance between performance and sustainability.