USER`S, MAINTENANCE and SERVICE INFORMATION
Contents
1. gas supply to the furnace should be shut off and no attempt should be made to place the furnace in operation The sys tem should be inspected by a qualified service technician Refer to Figure 2 for a typical installation 100 SHUT OFF The ignition modules are designed for 100 shut off If the furnace fails to ignite after three ignition attempts the flow of gas will be shut off and the ignition module will lock out The module can be reset by A Turning the system switch on the room thermostat to the OFF position and back to the HEAT position B Decreasing the set point of the room thermostat below the temperature in the conditioned space and returning it to its original setting Johnson Controls Unitary Products C Opening and closing the unit s main disconnect switch Main Gas Shut off Valve Field Installed Mounted Externally YUL FIGURE 2 TYPICAL INSTALLATION If the furnace continues to lock out a qualified service techni cian should be called to determine the cause of the problem AWARNING 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 R2. Controls Unitary Products 5005 York Drive Norman OK 73069
3. YORK Heating and Air Conditioning USER S MAINTENANCE and SERVICE INFORMATION MANUAL 3 THRU 12 5 TON SINGLE PACKAGE AIR CONDITIONER GAS ELECTRIC amp ELECTRIC ELECTRIC The manufacturer recommends that the User read all sections of this manual and keep the manual for future reference AWARNING FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in serious injury death or property damage Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance WHAT TO DO IF YOU SMELL GAS Do not try to light any appliance Do not touch any electrical switch do not use any phone in your building Leave the building immediately Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions lf you cannot reach your gas supplier call the fire department Installation and service must be per formed by a qualified installer service agency or the gas supplier 66386 YUM D 0912 SAFETY INFORMATION FOR YOUR SAFETY Make sure that the furnace area is clear and free of combustible materials gasoline and other flamma ble vapors and liquids Be sure the furnace is clear and free of insulating material Examine the furnace area after installa tion of the furnace or the installation of additional insulation Some types of insulation are combusti ble For proper operation of t
4. dically at least annually at the beginning of each heat ing season make a visual check of the main burner flame to determine if the burners need cleaning CLEANING BURNERS Remove them from the furnace as explained the in BURNER ORIFICE INSTRUCTIONS section in the Unit Installation Instructions Clean burners with wire brush and vacuum as needed CLEANING FLUE PASSAGES amp HEATING ELEMENTS With proper combustion adjustment the heat exchanger tubes of a gas fired furnace will seldom need cleaning If the tubes should become sooted they can be cleaned as follows 1 Remove the burner assembly as outlined in BURNER ORIFICES INSTRUCTIONS of the unit Installation Instructions 2 Remove the screws holding the flue collector box Care fully remove the flue collector box 3 Remove the flue baffles from the tube interiors Using a wire brush on a flexible wand brush out the inside of each heat exchanger from the burner inlet and flue outlet ends 5 Brush out the inside of the flue collector box and the flue baffles 6 Run the wire brush into the flue exhaust tube from the flue collector end Do not damage the flue exhaust screen remove if necessary 7 If soot build up is particularly bad remove the draft motor and clean the wheel and housing 8 After brushing is complete blow away all brushed areas with air or nitrogen Vacuum as needed 9 Replace parts in the reverse order that they were removed in Steps 1 t
5. econnect wires correctly Verify proper operation after servicing AWARNING 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 portio
6. his furnace air for com bustion and ventilation is required Make sure that these openings are not obstructed For lighting or shutting down this furnace refer to the lighting instructions provided adjacent to the burners and also located in this manual A blocked vent roll out switch is provided in the burner compartment This switch is a manual reset If the furnace fails to operate contact a qualified service technician Should the gas supply fail to shut off or if overheat ing occurs shut off the gas valve to the furnace before shutting off the electrical supply Then call a qualified service technician Do not use this furnace if any part has been under water A flood damaged furnace is extremely dan gerous Attempts to use the furnace can result in fire or explosion A qualified service technician should be contacted to inspect the furnace and to replace all gas controls control system parts elec trical parts that have been wet or the furnace if deemed necessary Determine the integrity of the installation regarding the flue gas vent the return and supply air duct Confirm the equipment is well supported and there are no signs of deterioration The manufacturer recommends that main burner ignition device and controls are inspected by a qualified service techni cian before each heating season 66386 YUM D 0912 SYSTEM OPERATION THERMOSTATS Set your thermostat for either heating or cooling then set it for the de
7. hrough 3 10 Assure that all seams on the vent side of the combustion system are airtight Apply a high temperature 500 F sealing compound where needed Johnson Controls Unitary Products 66386 YUM D 0912 AIR FILTERS All units contain four filters The filter racks on these units will receive either 1 or 2 filters Filters can also be installed in the building at a suitable return air location if an economizer or outside air accessory is not used Filters must always be used They should be inspected once a month and thor oughly cleaned or replaced if it appears they are beginning to accumulate excessive dirt To install the filters remove the filter access panel as shown in Figure 4 FILTERS NOTE Filters must be installed with Air Flow arrows point ing inward toward the indoor coil In the event the spacers in the filter section are removed they must be reinstalled in their original position Slide filters all the way into the filter racks provided When more than one filter in a filter rack is required they must butt each other when sliding into position Replace the filter access panel INDOOR COIL FILTER ACCESS PULLS FIGURE 4 FILTER ACCESS BLOWER ASSEMBLY Even with good filters properly in place blower wheels and motors will become dust laden after many months of opera tion The entire blower assembly should be inspected annu ally If the motor and wheel are heavily coated with dust
8. i tions are restored Johnson Controls Unitary Products 66386 YUM D 0912 INPUT The correct heat capacity of the furnace is regulated by the burner orifices and the gas pressure The proper orifices are furnished but the gas pressure regulator must be adjusted by the installer or gas utility service technician OPERATING INSTRUCTIONS TO SHUT DOWN THE FURNACE 1 Close the main gas shutoff valve s 2 Turn off the electric power supply TO LIGHT THE FURNACE 1 Do not attempt to light manually 2 Open the main gas shutoff valve s 3 Adjust the set point of the room thermostat above the temperature in the space 4 Turn on the electric power supply 5 The draft fan will operate After an adequate purge time the electric spark igniter will light the burners 6 The burners will extinguish and relight automatically upon the demand of the room thermostat VENT SAFETY SYSTEM This gas furnace is equipped with a manual reset high tem perature sensor or rollout switch which in the unlikely event of a sustained main burner flame rollout will shut off the flow of gas by closing the main gas valve The ignition modules will also be disabled preventing the flow of gas to the valve The switch is located inside the gas heat access panel above the burner inlet Flame rollout can be caused by blockage of the power vent system improper gas pressure or adjustment If this event occurs the furnace will not operate properly The
9. n 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 burner If it does not contact a qualified service technician for assistance Check the appear ance of the main burner flame The flame should have a blue appearance See Figure 3 66386 YUM D 0912 HEAT EXCHANGER TUBE GAS SUPPLY PIPE BURNER BURNER BRACKET IGNITOR FIGURE 3 TYPICAL FLAME BURNER CHECK BURNER camel BLUE ONLY LL Perio
10. ny debris and dirt from the outside coil face with a brush being careful not to damage the fins If extremely dirty a hose can be used to wash the coil from the inside out while brushing a soapy solution on the outside A CAUTION Damage can occur if the bearings are overlubricated Use grease sparingly REGISTERS Supply and return air registers must be open when the unit is in operation Obstructions must not be allowed to block air flow in or out of the registers TROUBLESHOOTING BEFORE CALLING A SERVICE TECHNICIAN A Check thermostat setting and insure thermostat is calling for heat or cooling B Check thermostat for lint etc Check fuses or circuit breakers D Check filters for excessive dust accumulation OWNER please have your installer fill in the following information immediately after unit has been installed and is properly operating Installed by Installer s Address Installation Date Owner s Name Owner s Address Equipment installed at address Model Number Distributor from whom the equipment was purchased Serial Number The owner should keep this information in a place where it can be found if needed for warranty purposes Aan ased CERTIFIED Fan aad CERTIFIED Unitary Lange AC AHF Standard HPI Subject to change without notice Printed in U S A Copyright 2011 by Johnson Controls Inc All rights reserved 66386 YUM D 0912 Supersedes 66386 YUM C 1011 Johnson
11. sired temperature DO NOT ADJUST THE THERMO STAT RAPIDLY ON AND OFF OR BACK AND FORTH FROM HEAT TO COOL THIS COULD DAMAGE YOUR EQUIPMENT Always allow at least 5 minutes between changes Find the temperature that is most comfortable to you and then LEAVE YOUR THERMOSTAT ALONE Exception is for night or vacation set back to conserve energy Manually moving the thermostat up or down will not soeed up temperature changes in your rooms This only causes the thermostat switch to function at your command rather than responding to room temperature Heat generated by devices other than the furnace may inter fere with thermostat performance Therefore lamps radios television sets etc should not be placed near the thermostat FIGURE 1 TYPICAL THERMOSTAT INTERMITTENT IGNITION DEVICE A CAUTION This furnace is equipped with an intermittent auto matic ignition system Do Not attempt to manually relight the burners Personal injury could result When the thermostat calls for heat gas is supplied and at the same time sparking occurs to light the burner With the burner lit the flame sensor rod closes a circuit to the ignitor control which allows the burner to continue to fire When the room thermostat is satisfied the electrical circuit to the gas valve is opened closing main burner gas If the burner should fail to light contact your heating contractor or gas utility for service to insure that proper operating cond
12. they can be brushed and cleaned with a vacuum cleaner These units are supplied with blower shaft bearings that do not require maintenance but may be lubricated if desired Every three years using a low pressure grease gun pump grease into the bearing grease fitting until grease just begins to show at the seals Do not over lubricate Use any lithium base grease recommended for ball bearing ser vice Johnson Controls Unitary Products AWARNING Perform all maintenance operations on the blower motor with electric power disconnected from the unit Do not attempt to lubricate bearings with the unit in operation MOTORS Outdoor fan motors are permanently lubricated and require no maintenance Ventor motor is factory lubricated for an estimated 10 year life Indoor Blower Motor and Drive The indoor blower motor fea tures ball bearings that do not require periodic lubrication However if the motor has grease fittings periodic lubrication of the motor bearings can extend the life of components but is optional If desired every three years using a low pressure grease gun pump grease into the bearing grease fitting until grease just begins to show at the seals Do not over lubricate Use any lithium base grease recommended for ball bearing ser vice CONDENSER COIL An annual check and cleaning if necessary of the outdoor coil should be done Cleaning should be as often as neces sary to keep the coil clean Clean a
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