Rheem 2-Stage Use & Care Manual
Contents
1. GAS CONTROL TURN KNOB ON OFF MAINTENANCE It is recommended for safety and proper furnace operation that a seasonal inspection and start up be performed This should include your furnace supply ducts return ducts electrical supply gas supply drain and vent system This routine maintenance must be performed by a qualified HVAC professional service agency or the gas supplier WARNING TURN OFF ELECTRICAL POWER TO THE FURNACE BEFORE REMOVING PANELS FAILURE TO DO SO CAN RESULT IN ELECTRICAL SHOCK SEVERE PERSONAL INJURY OR DEATH WARNING DO NOT OPERATE THE SYSTEM WITHOUT FILTERS A PORTION OF THE DUST ENTRAINED IN THE AIR MAY TEMPORARILY LODGE IN THE DUCT RUNS AND AT THE SUPPLY REGISTERS ANY CIRCULATED DUST PARTICLES COULD BE HEATED AND CHARRED BY CONTACT WITH THE FURNACE HEAT EXCHANGER THIS RESIDUE COULD SOIL CEILINGS WALLS DRAPES CARPETS AND OTHER ARTICLES IN THE HOUSE SOOT DAMAGE MAY OCCUR WITH FILTERS IN PLACE WHEN CERTAIN TYPES OF CANDLES OIL LAMPS OR STANDING PILOTS ARE BURNED FILTER MAINTENANCE Have your qualified installer service agency or the gas supplier instruct you on how to access your filters for regular maintenance FILTERS Filter application and placement are critical to airflow which may affect the heating and cooling system performance Reduced airflow can shorten the life of the system s major components such as motor limits heat exchanger evaporat2. exit conduit opening Caulking is required to prevent air leakage into and condensate from forming inside the unit control box and on electrical controls SYSTEM OPERATION INFORMATION IMPORTANT THIS FURNACE WAS DESIGNED TO OPERATE ON 110 125 VOLTS SUPPLIED BY A COMMERCIAL POWER UTILITY IMPORTANT CONNECT THIS FURNACE ONLY TO GAS SUPPLIED BY A COMMERCIAL UTILITY 1 Keep the air filters clean Your heating system will operate more efficiently and provide better heating more economically 2 Arrange your furniture and drapes so that the supply air registers and the return air grilles are unobstructed 3 Close doors and windows This will reduce the heating load on your system 4 Avoid excessive use of exhaust fans 5 Do not permit the heat generated by appliances such as televisions lamps or radios to influence the thermostat operation 6 If you desire to operate your system with constant air circulation consult your thermostat manual or obtain advice from your HVAC professional service agency or the gas supplier When continuous fan is used the indoor fan will shut off on a call for heat This allows the heat exchanger to warm up 7 Do not close off any supply or return registers During the heating season the operation of the warm air furnace is automatic Your HVAC professional service agency or the gas supplier has FIGURE 2 e Install the unit in such a way as to allow necessary access
3. to the coil filter rack and blower control compartment e Install the unit in a level position to ensure proper condensate drainage Make sure unit is level in both directions within 1 8 e Install the unit in accordance with any local code which may apply and the national codes Latest editions are available from National Fire Protection Association Inc Batterymarch Park Quincy MA 02269 These publications are e ANSI NFPA No 70 Latest Edition National Electrical Code e NFPA9OA Installation of Air Conditioning and Ventilating Systems e NFPAQOB Installation of warm air heating and air conditioning systems e The equipment has been evaluated in accordance with the Code of Federal Regulations Chapter XX Part 3280 BURNER COMPARTMENT SHOWING LOCATION OF GAS CONTROLS UPFLOW TOP VIEW OF GAS LINE AND VALVE IN OPT POSITION NOTE WHEN GAS LINE IS IN OPT POSITION SWAP MANUAL GAS STOP BURNERS GROMMET IN NORMAL POSITION DRIP LEG UNION LOCATION OF GROMMET AND PLUG sd OPT GAS LINE Z POSITION MANIFOLD PRESSURE TAP PLUG IN NORMAL POSITION MANIFOLD GAS VALVE IMPORTANT DO NOT RUN A FLEXIBLE GAS CONNECTOR INSIDE THE UNIT Extend the 1 2 black pipe from the gas valve to the union outside of the cabinet provided a wall mounted thermostat which is sensitive to the change in temperature of the air moving around the thermostat Your thermosta
4. HOROUGHLY BEFORE ATTEMPTING TO OPERATE THIS FURNACE This furnace has been designed to give you many years of efficient dependable home comfort With proper installation correctly sized furnace and duct system along with seasonal maintenance this furnace will provide superior operation year after year Please read this manual and installation instructions to familiarize yourself with installation operation maintenance and safety procedures WARNING WE THE MANUFACTURER CANNOT AND WILL NOT BE RESPONSIBLE FOR INJURY OR DAMAGE CAUSED BY THE USE OF ANY UNTESTED AND OR UNCERTIFIED DEVICES ACCESSORIES OR COMPONENTS WARNING IMPROPER INSTALLATION ADJUSTMENT ALTERATION SERVICE OR MAINTENANCE CAN CAUSE PROPERTY DAMAGE PERSONAL INJURY OR DEATH FOR ASSISTANCE OR ADDITIONAL INFORMATION CONSULT A QUALIFIED INSTALLER SERVICE AGENCY OR THE GAS SUPPLIER WARNING DO NOT USE THIS FURNACE IF ANY PART HAS BEEN UNDER WATER A FLOOD DAMAGED FURNACE IS EXTREMELY DANGEROUS ATTEMPTS TO USE THE FURNACE CAN RESULT IN FIRE OR EXPLOSION A QUALIFIED SERVICE AGENCY SHOULD BE CONTACTED TO INSPECT THE FURNACE HVAC EQUIPMENT THAT HAS BEEN UNDER WATER SHOULD BE REPLACED TO AVOID ANY RISK OF INJURY OR HARM CAREFULLY FOLLOW THESE SAFETY RULES 1 The area around the furnace must be kept clear and free of all combustible materials including gasoline and other flammable vapors and liquids DO NOT DES
5. More details are available at the Websites for OSHA Occupational Safety and Health Administration at www osha gov and the State of California s OEHHA Office of Environmental Health Hazard Assessment at www oehha org Consumer education is important since the chemicals and substances on the list are found in our daily lives Most consumers are aware that products present safety and health risks when improperly used handled and maintained WARNING FIRE OR EXPLOSION HAZARD Failure to follow safety warnings and the installation instructions 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 If you cannot reach your gas supplier call the fire department INSTALLATION AND SERVICE MUST BE PERFORMED BY A QUALIFIED INSTALLER SERVICE AGENCY OR THE GAS SUPPLIER A WARNING THIS FURNACE IS NOT APPROVED FOR INSTALLATION IN A MOBILE HOME DO NOT INSTALL THIS FURNACE IN A MOBILE HOME INSTALLATION IN A MOBILE HOME COULD CAUSE FIRE PROPERTY DAMAGE PERSONAL INJURY OR DEATH IMPORTANT READ THESE INSTRUCTIONS T
6. N UNSATISFACTORY OPERATION AND OR DANGEROUS CONDI TIONS AND ARE NOT COVERED BY THE UNIT WARRANTY A NOTICE IN COMPLIANCE WITH RECOGNIZED CODES IT IS RECOMMENDED THAT AN AUXILIARY DRAIN PAN BE INSTALLED UNDER ALL EVAPORATOR COILS OR UNITS CONTAINING EVAPORATOR COILS FIGURE 1 FOR YOUR SAFETY READ BEFORE OPERATING A WARNING IF YOU DO NOT FOLLOW THESE INSTRUCTIONS EXACTLY A FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE PERSONAL INJURY OR LOSS OF LIFE NOTE Read and follow the Safety Information Operating Instructions and Instructions To Turn Off Gas To Appliance are located on the furnace This label will have specific information regarding the furnace and its gas controls THAT ARE LOCATED IN ANY AREA OF A STRUCTURE WHERE DAMAGE TO THE BUILDING OR BUILDING CONTENTS MAY OCCUR AS A RESULT OF AN OVERFLOW OF THE COIL DRAIN PAN OR A STOPPAGE IN THE PRIMARY CONDENSATE DRAIN PIPING SEE ACCESSORIES SECTION OF THESE INSTRUCTIONS FOR AUXILIARY HORIZONTAL OVERFLOW PAN INFORMATION MODEL RXBM IMPORTANT INFORMATION ABOUT EFFICIENCY AND INDOOR AIR QUALITY Central cooling and heating equipment is only as efficient as the duct system MIGRATION OF DANGEROUS SUBSTANCES FUMES AND ODORS INTO LIVING SPACES that carries the cooled or heated air To maintain efficiency comfort and good indoor air quality it is important to have the proper balance between the air being supplied to each room and th
7. TROY PLEASE READ CAREFULLY AND KEEP IN A SAFE PLACE FOR FUTURE REFERENCE 92 20802 88 04 SUPERSEDES 92 20802 88 03 2 A furnace installed in an attic or other insulated space must be kept free and clear of insulating material Examine the furnace area when installing the furnace or adding more insulation Some materials may be combustible 3 To prevent carbon monoxide poisoning all panels must be replaced in proper position after the furnace is serviced Do not operate the unit without all panels securely in place 4 Should overheating occur or the gas valve fail to shut off the gas supply turn off the manual gas stop to the furnace before turning off the electrical supply 5 Any additions changes or conversions required in order for the furnace to satisfactorily meet the application should be made by a HVAC professional service agency or the gas supplier using factory specified or approved parts Read your WARRANTY This furnace was equipped at the factory for use on NATURAL GAS ONLY Conversion to L P GAS requires a special kit available through your HVAC professional from the local distributor 6 A furnace needs an adequate supply of combustion and ventilation air for proper and safe operation Do not block enclose or obstruct air openings on the furnace or air openings supplying the area where the furnace is installed Do not store anything around the furnace that could block the flow of fresh air
8. USER S INFORMATION MANUAL UPFLOW amp DOWNFLOW HORIZONTAL TWO STAGE CONDENSING GAS FURNACES SAFETY A Recognize this symbol as an indication of Important Safety Information WARNING IMPORTANT All manufacturer products meet current Federal OSHA Guidelines for safety California Proposition 65 warnings are required for certain products which are not covered by the OSHA standards California s Proposition 65 requires warnings for products sold in California that contain or produce any of over 600 listed chemicals known to the State of California to cause cancer or birth defects such as fiberglass insulation lead in brass and combustion products from natural gas All new equipment shipped for sale in California will have labels stating that the product contains and or produces Proposition 65 chemicals Although we have not changed our processes having the same label on all our products facilitates manufacturing and shipping We cannot always know when or if products will be sold in the California market You may receive inquiries from customers about chemicals found in or produced by some of our heating and air conditioning equipment or found in natural gas used with some of our products Listed below are those chemicals and substances commonly associated with similar equipment in our industry and other manufacturers e Glass Wool Fiberglass Insulation e Carbon Monoxide CO e Formaldehyde e Benzene
9. a negative pressure on the heat exchanger to close the negative pressure switch The induced draft blower must maintain at least the negative pressure switch set point for the furnace to operate If the induced draft blower fails to close or maintain the closing of the negative pressure switch a no heat call would result LIGHTING INSTRUCTIONS DIRECT SPARK IGNITION This appliance is equipped with a direct spark ignition device This device lights the main burners each time the room thermostat closes calls for heat See lighting instructions on the furnace A WARNING WARNING TO START FURNACE NOTE DURING INITIAL START UP OF THE FURNACE IT IS NOT UNUSUAL FOR ODOR OR SMOKE TO FLOOR DRAIN OR CONDENSATE PUMP a103101 TO COME OUT OF ANY ROOM REGISTERS IT IS RECOMMENDED TO ENSURE PROPER VENTILATION BY OPENING WINDOWS AND DOORS BEFORE INITIAL FIRING 1 BE SURE THAT THE MANUAL GAS STOP HAS BEEN IN THE OFF POSITION FOR AT LEAST FIVE MINUTES DO NOT ATTEMPT TO MANUALLY LIGHT THE MAIN BURNERS FAILURE TO FOLLOW THIS WARNING CAN CAUSE A FIRE OR AN EXPLOSION FIGURE 4 RESULTING IN PROPERTY DAMAGE PERSONAL INJURY OR DEATH 2 Set the room thermostat to the lowest temperature setting 3 Remove furnace panel 4 Turn the gas control knob to the On position or set the gas control switch to the On position 5 Securely replace furnace panel 6 Turn on the manual gas stop and th
10. ced draft motor are prelubricated by the component manufacturers and do not require further attention Addition of lubricants can reduce the motor life and void the warranty CONDENSATE Be sure the vented condensate drain line from the furnace is not connected to the evaporator drain line and does not become blocked or plugged Visual inspection of condensate flow can be made after 10 minutes of furnace operation Condensate from the furnace must flow freely If a neutralizer kit is required for the condensate water from the furnace by local codes it should be installed according to the amp O manual Thank you for purchasing our product TABLE 1 FILTER SIZES UPFLOW FILTER SIZES FURNACE INPUT BOTTOM SIDE WIDTH MBTUH SIZE SIE LA 171 2 45 60 75A 21 75B 90 105 241 2 120 153 4 X 25 191 4 X 25 223 4 X 25 153 4 X 25 153 4 X 25 153 4 X 25 FIGURE 8 UPFLOW BOTTOM FILTER INSTALLATION _ FILTER 7 ROD ROD ADS 5422 01 O a L lt SIDUANTITY DOWNFLOW 75B 90 105A 105B 120 Y Lu ES N cc Lt E La lt E cc Ha Aa HORIZONTAL TABLE 2 FILTER SIZES FILTER LOCATIONS 1528 FIGURE 9 CM 1209
11. e electrical power 7 Set the room thermostat to Heat and adjust to desired room temperature TO SHUT DOWN FURNACE 1 Set the room thermostat to its lowest temperature setting Turn the thermostat to Off 2 Shut off the gas to main burners by turning the gas control switch to the Off position or turn the manual gas stop to the closed position A WARNING WARNING SHOULD OVERHEATING OCCUR OR THE GAS SUPPLY FAIL TO SHUT OFF SHUT OFF THE MANUAL GAS STOP TO THE APPLIANCE BEFORE SHUTTING OFF THE ELECTRICAL SUPPLY FAILURE TO DO SO CAN CAUSE AN EXPLOSION OR FIRE RESULTING IN PROPERTY DAMAGE PERSONAL INJURY OR DEATH NOTE Sequence of operation can be located in the Installation instructions in the start up procedure section This covers operation of the furnace with single stage or two stage thermostats BURNER COMPARTMENT SHOWING LOCATION OF TYPICAL GAS CONTROLS HORIZONTAL 7 MANUAL GAS VALVE a DRIP LEG BURNERS MANIFOLD GAS VALVE FIGURE 5 TYPICAL GAS VALVE HIGH FIRE MANIFOLD PRESSURE GAS VALVE 60 101921 02 ADJUSTMENT LOW FIRE e MANIFOLD AAA PRESSURE Zar Sur ADJUSTMENT _ Md GAS CONTROL 3 SWITCH FED Es apres INLET PRESSURE TAP OUTLET PRESSURE TAP FIGURE 6 TYPICAL DIRECT SPARK IGNITION GAS VALVE HIGH FIRE MANIFOLD PRESSURE ADJUSTMENT LOW FIRE MANIFOLD PRESSURE ADJUSTMENT OUTLET PRESSURE TAP PRESSURE TAP
12. e air returning to the cooling and heating equipment Proper balance and sealing of the duct system improves the efficiency of the heating and air conditioning system and improves the indoor air quality of the home by reducing the amount of airborne pollutants that enter homes from spaces where the ductwork and or equipment is located The manufacturer and the U S Environmental Protection Agency s Energy Star Program recommend that central duct systems be checked by a qualified contractor for proper balance and sealing RECEIVING Immediately upon receipt all cartons and contents should be inspected for transit damage Units with damaged cartons should be opened immediately If damage is found it should be noted on the delivery papers and a damage claim filed with the last carrier e After unit has been delivered to job site remove carton taking care not to damage unit e Check the unit rating plate for unit size electric heat coil voltage phase etc to be sure equipment matches what is required for the job specification e Read the entire instructions before starting the installation e Some building codes require extra cabinet insulation and gasketing when unit is installed in attic applications e If installed in an unconditioned space apply caulking around the power wires control wires refrigerant tubing and condensate line where they enter the cabinet Seal the power wires on the inside where they
13. or coil or compressor Consequently we recommend that the return air duct system have only one filter location The most common location will be inside the furnace or a filter base For systems with a return air filter grill or multiple filter grills can have a filter installed at each of the return air openings Your HVAC professional can show you where they have installed the filter s If high efficiency filters or electronic air cleaners are used in the system it is important that the airflow is not reduced to maximize system performance and life Always verify that the system s airflow is not impaired by the filtering system that has been installed by performing a temperature rise and temperature drop test Keep the filter s clean at all times Vacuum dirt from filter wash with detergent and water air dry thoroughly and reinstall DO NOT DOUBLE FILTER THE RETURN AIR DUCT SYSTEM DO NOT FILTER THE SUPPLY AIR DUCT SYSTEM RECOMMENDED ROUTINE MAINTENANCE 1 Itis recommended that an annual inspection of your furnace supply return drain gas and vent systems be done by a qualified installer service agency or the gas supplier 2 Gas burners should be inspected for dirt rust or scale and cleaned or replaced as necessary FIGURE 7 UPFLOW SIDE FILTER LOCATION JACKET gt ol a E FILTER ROD L SUPPORT ANGLE FILTER gt SUPPORT ANGLE LUBRICATION The blower motor and indu
14. t may have switches to select some or all of the following functions HEAT Turns heating on when temperature drops below the desired temperature COOL Turns cooling on when temperature rises above the desired temperature AUTO Turns cooling or heating system on as required to maintain the desired temperature NOTE Have your HVAC professional instruct you on the proper operation of your system and filter location FIGURE 3 BURNER COMPARTMENT SHOWING LOCATION OF GAS CONTROLS DOWNFLOW NOTE NY DRAIN VENT NEEDS TO BE ABOVE COLLECTOR BOX DRAIN SPOUT MINIMUM HEIGHT OPEN TOP OVERFLOW LINE REQUIRED ONLY WHEN OPTIONAL NEUTRALIZER CARTRIDGE IS USED CONDENSATE TRAP DRAIN LINE NEUTRALIZER CARTRIDGE OPTIONAL OFF Turns heating and cooling modes off The blower may still circulate air in the FAN ON position FAN ON Turns the blower on for continuous operation FAN AUTO The blower cycles on and off with cooling or heating operation This furnace has a negative pressure switch that is a safety during a call for heat The induced draft blower must pull
15. to the unit Your installation may receive air from the inside heated space from the outside from the attic or crawl space as specified in the installation instruction Whenever adding insulation be sure the air supply openings are not covered GENERAL INFORMATION WARNING DUCT LEAKS CAN CREATE AN UNBALANCED SYSTEM AND DRAW DIRT DUST FUMES AND ODORS INTO THE HOME CAUSING PROPERTY DAMAGE FUMES AND ODORS FROM TOXIC VOLATILE OR FLAMMABLE CHEMICALS AS WELL AS AUTOMOBILE EXHAUST AND CARBON MONOXIDE CO CAN BE DRAWN INTO THE LIVING SPACE THROUGH LEAKING DUCTS AND UNBALANCED DUCT SYSTEMS CAUSING PERSONAL INJURY OR DEATH SEE FIGURE 1 e IF AIR MOVING EQUIPMENT OR DUCTWORK IS LOCATED IN GARAGES OR OFF GARAGE STORAGE AREAS ALL JOINTS SEAMS AND OPENINGS IN THE EQUIPMENT AND DUCT MUST BE SEALED TO LIMIT THE MIGRATION OF TOXIC FUMES AND ODORS INCLUDING CARBON MONOXIDE FROM MIGRATING INTO THE LIVING SPACE e IF AIR MOVING EQUIPMENT OR DUCTWORK IS LOCATED IN SPACES CONTAINING FUEL BURNING APPLIANCES SUCH AS WATER HEATERS OR BOILERS ALL JOINTS SEAMS AND OPENINGS IN THE EQUIPMENT AND DUCT MUST ALSO BE SEALED TO PREVENT DEPRESSURIZATION OF THE SPACE AND POSSIBLE MIGRATION OF COMBUSTION BYPRODUCTS INCLUDING CARBON MONOXIDE INTO THE LIVING SPACE A NOTICE IMPROPER INSTALLATION OR INSTALLATION NOT MADE IN ACCORDANCE WITH THE CSA INTERNATIONAL CSA CERTIFICATION OR THESE INSTRUCTIONS CAN RESULT I
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