Service Instructions Goodman® & Amana® Brand 80% Single Stage Gas Furnaces GMS8, AMS8, GDS8, ADSS8 & Accessories ® This manual is to be used by qualified, professionally trained HVAC technicians only. Goodman does not assume any responsibility for property damage or personal injury due to improper service procedures or services performed by an unqualified person.The material in this manual does not supercede manufacturer’s installation and operation instructions.
TABLE OF CONTENTS IMPORTANT INFORMATION ........................... 2-3 SYSTEM OPERATION ....................................... 37 PRODUCT IDENTIFICATION .......................... 4- 9 TROUBLESHOOTING .................................. 38-39 ACCESSORIES ............................................ 10- 14 MAINTENANCE ............................................ 40- 43 OPERATING INSTRUCTIONS .................... 15 - 17 SERVICING .................................................
IMPORTANT INFORMATION Special Warning for Installation of Furnace or Air Handling Units in Enclosed Areas such as Garages, Utility Rooms or Parking Areas Carbon monoxide producing devices (such as an automobile, space heater, gas water heater, etc.) should not be operated in enclosed areas such as unventilated garages, utility rooms or parking areas because of the danger of carbon monoxide (CO) poisoning resulting from the exhaust emissions.
PRODUCT IDENTIFICATION The model and manufacturing number are used for positive identification of component parts used in manufacturing. Please use these numbers when requesting service or parts information.
PRODUCT IDENTIFICATION The model and manufacturing number are used for positive identification of component parts used in manufacturing. Please use these numbers when requesting service or parts information.
PRODUCT IDENTIFICATION 6 MOD E L # MFG. # 80 % GA S F URNAC E S AMS8 A M S 8 04 0 3 A XA A A M S 8 06 0 3 A XA A A M S 8 06 0 4 B XA A A M S 8 08 0 4 B XA A A M S 8 08 0 5 C XA A A M S 8 10 0 5 C XA A A M S 8 12 0 5 D XA A A M S 8 1 4 05 D N B A A m a n a B ra nd 8 0 % g a s fu rn a c e, 3 3 3/8 " ta ll, up flo w , h o riz o n ta l rig h t o f le ft ins ta lla tio n po s itio n s . In d uc e d d ra ft, tw o-to ne g ra y c ab in et an d p a ne ls .
PRODUCT IDENTIFICATION MODEL # MFG. # 80 % GA S FURNA C E S GMS8 G M S 80 40 3A *A * G M S 80 60 3A *A * G M S 80 60 4B *A * G M S 80 80 4B *A * G M S 80 80 5C *A * G M S 81 00 5C *A * G M S 81 20 5D *A * G o o d m a n B ra n d 8 0 % g a s fu rn a c e , 3 3 3 / 8 " t a ll, u p flo w , h o riz o n t a l rig h t o f le ft in s t a lla t io n p o s it io n s . In d u c e d d ra ft , G o o d m a n g ra y c a b in e t a n d p a n e ls .
PRODUCT IDENTIFICATION MODEL # DESCRIPTION AFE18-60A N/ A Fossil Fuel Kit. The AFE18-60A control is d esigned for use where the indo or coil is lo cated above/d ownstream of a gas or fossil fuel furnace when used with a heat p ump. It will operate with sing le and two stage heat pumps and single and two stage furna ces. The AFE18-60A control wi ll turn the he at pump unit off when the furnace is turned on. An anti-short cycle feature initiates a 3 min ute timed off delay when the compressor goes off.
PRODUCT IDENTIFICATION MODEL # LPLP03 LPT-03 MVK-01A MVK-02A SBT14 SBT17 SBT21 MFG # DESCRIPTION N/A LP Gas Low Pressure Kit. Designed for application on gas fired furnace products installe d on LP gas listed in this manual. Thi s kit includes harness adaptors to work with White-Rodgers single & two stage gas valves,Honeywell singl e and two-stage ga s valves, as well as modulating gas valve s. N/A LP Conversion Kit. This kit converts only single-stage gas fired units from natural to propane gas.
ACCESSORIES · · · · · · · · · · · · · 10 (1) (1) (1) (1) (1) (1) (1) (1) (1) (1) (1) (2) (2) (2) (2) (2) (2) (2) (2) (2) (2) (2) (2) not approved for this model approved for this model (1) W/R & HW single stage valve (2) AA Rev 5,500 - 10,000 FT · · · · · · MVK-02 · · · · · · · · · · · · (1) Masonry Vent Kit HANG21 High Altitude Orifices W/P ressure Switch · · · · · · · · · · · · · · · · MVK-01 FTK04 Twinning Kit · · · · · · · · · · · · Masonry Vent Kit LPLP03 LP Low Pressure Shut Off Kit
ACCESSORIES ® · (1) (1) (1) (1) (1) (1) (2 ) (3 ) (2 ) (3 ) (2 ) (3 ) (2 ) (3 ) (2 ) (3 ) (5 ) (2 ) (3 ) (2 ) (3 ) (2 ) (3 ) (2 ) (3 ) (2 ) (3 ) · · · · · · FSRKG24 Sound Reduction Kit FSRKG21 Sound Reduction Kit FSRKG17 Sound Reduction Kit FSRKG14 Sound Reduction Kit (3 ) MVK-02 (2 ) Masonry Vent Kit · · · · · · · · · · · · MVK-01 · · · · · · · · · · · · Masonry Vent Kit LPLP03 HANG21 (1) High Altitude Orifices W/Pressure Switch (1) HANG20 (1) High Altitude Orific
ACCESSORIES EXTERNAL FILTER RACK KIT ( EFR01 ) SLOTS IN FILTER CLEAR SCREWS ON UNIT BLOWER DECK SCREWS UNIT SIDE PANEL FRONT OF UNIT FILTER RACK ASSEMBLY (FACE FILTER OPENING TOWARDS FRONT OF UNIT) BASE OF UNIT RETURN AIR CUTOUT AREA LOWER EDGE SCREW EFR01 EXTERNAL FILTER RACK KIT Used on Models 80% Upflow Model Furnaces 12
ACCESSORY WIRING DIAGRAMS HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
ACCESSORY WIRING DIAGRAMS HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. FURNACE TWINING KIT - FTK04 (UTEC Control Board) This wiring diagram is for reference only. Not all wiring is as shown above. Refer to the appropriate wiring diagram for the unit being serviced.
OPERATING INSTRUCTIONS FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do not follow these instructions explosion may result causing property damage, personal injury or loss of life. LIRE AVANT DE METTRE EN MARCHELIRE AVERTISSEMENT: Quiconque ne respecte pas á la lettre les instructions dans le présent manuel risque de déclecher un incendie ou une explosion entraînant des dammages matériels, des lésions corporelles ou la perte de vies humaines. A. This appliance does not have a pilot.
OPERATING INSTRUCTIONS FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do not follow these instructions exactly,a fire or explosion may result causing property damage,personal injury or loss of life. A.This appliance does not have a pilot. It is equipped with a n ignition device which automatically lights the burner. Do not try to light the burner by hand. B.BEFORE OPERATING smell all around the appliance area for gas.
OPERATING INSTRUCTIONS FOR YOUR SAFETY READ BEFORE OPERATING If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burners. Do not try to light the burners by hand. B. BEFORE OPERATING smell around the appliance area for gas.
PRODUCT DESIGN Safety Please adhere to the following warnings and cautions when installing, adjusting, altering, servicing, or operating the furnace. WARNING TO PREVENT PERSONAL INJURY OR DEATH DUE TO IMPROPER INSTALLATION, ADJUSTMENT, ALTERATION, SERVICE OR MAINTENANCE, REFER TO THIS MANUAL. FOR ADDITIONAL ASSISTANCE OR INFORMATION, CONSULT A QUALIFIED INSTALLER, SERVICE AGENCY OR THE GAS SUPPLIER.
PRODUCT DESIGN CSA International 8501 East Pleasant Valley Cleveland, OH 44131 • A copy of the CAN/CGA B149 Installation Codes can be obtained from: CSA International 178 Rexdale Boulevard Etobicoke, Ontario, Canada M9W, 1R3 The rated heating capacity of the furnace should be greater than or equal to the total heat loss of the area to be heated.
PRODUCT DESIGN A furnace installed in a confined space (i.e., a closet or utility room) must have two ventilation openings with a total minimum free area of 0.25 square inches per 1,000 BTU/ hr of furnace input rating. One of the ventilation openings must be within 12 inches of the top; the other opening must be within 12 inches of the bottom of the confined space. In a typical construction, the clearance between the door and door frame is usually adequate to satisfy this ventilation requirement.
PRODUCT DESIGN Improved construction and additional insulation in buildings have reduced heat loss by reducing air infiltration and escape around doors and windows. These changes have helped in reducing heating/cooling costs but have created a problem supplying combustion and ventilation air for gas fired and other fuel burning appliances. Appliances that pull air out of the house (clothes dryers, exhaust fans, fireplaces, etc.) increase the problem by starving appliances for air.
PRODUCT DESIGN Indoor Spaces through Indoor Combustion Air Openings. (2) Combining spaces in different stories. The volumes of spaces in different stories shall be considered as communicating spaces where such spaces are connected by one or more openings in doors or floors having a total minimum free area of 2 in.2/1000 Btu/hr (4400 mm2/ kW) of total input rating of all appliances. (2)* Where communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of 1 in.
PRODUCT DESIGN (a) The ratio of the interior spaces shall be the available volume of all communicating spaces divided by the required volume. (b) The outdoor size reduction factor shall be 1 minus the ratio of interior spaces. (c) The minimum size of outdoor opening(s) shall be the full size of outdoor opening(s) calculated in accordance with 9.3.3, multiplied by the reduction factor. The minimum dimension of air openings shall not be less than 3 in. (80 mm). 9.3.5 Engineered Installations.
PRODUCT DESIGN When an existing furnace is removed from a venting system serving other appliances, the venting system may be too large to properly vent the remaining attached appliances. For complete details refer to Exisiting Furnace Removal section of this manual. When resizing any portion of the common venting system, use the appropriate table in Appendix G in the latest edition of the National Fuel Gas Code NFPA 54/ANSI Z223.1.
PRODUCT DESIGN 10' or Less Proper Chimney Termination? (Check 1) No Line, terminate with listed vent cap (Fix 1) 2' Min. 2' Min. 3' Min. Yes Wall or Parapet Chimney channel free of solid and liquid fuel appliances? (Check 2) No Chimney Change venting arrangements (Fix 2) 10' or Less Yes 2' Min. Ridge Crown in good condition (Check 3) No Rebuild crown (Fix 3) and/or Reline (Fix 4) 3' Min.
PRODUCT DESIGN Check 2 - Any solid or liquid fuel appliances vented into this chimney channel. Solid fuel appliances include fireplaces, wood stoves, coal furnaces, and incinerators. Liquid fuel appliances include oil furnaces, oil-fired boilers and oil-fired water heaters. Appliances which burn propane (sometimes referred to as LP (liquefied petroleum)) gas are considered gas-fired appliances. Check 3 - Chimney Crown Condition. Damage from condensate usually shows up first in the crown.
PRODUCT DESIGN If dilution air will not be available, the chimney must be relined (Fix 4). Check 7 - Complete the Installation. If Checks 1 through 6 have been satisfactory, and the liner is an acceptable size as determined by the tables in National Fuel Gas Code NFPA 54/ANSI Z223.1 - latest edition and in the National Standard of Canada, CAN/CGA B149.1 and CAN/CGA B149.2 - latest editions and amendments, then the clay tile liner can probably be used as a vent for the gas appliances.
PRODUCT DESIGN To install the liner, read and follow the liner manufacturer’s instructions and your local codes. Excess liner length should be pulled out of the chimney and cut off. Use caution when doing this, as the cut edges of flexible liners may be sharp. Do not spiral excess liner inside of the chimney. Support the liner as recommended by the liner manufacturer. Some manufacturers of flexible liners offer an insulation sleeve designed to be added to the liner before it is installed in the chimney.
PRODUCT DESIGN High altitude kits are purchased according to the installation altitude and usage of either natural or propane gas. Refer to the product Specification Sheet or Technical Manual for a tabular listing of appropriate altitude ranges and corresponding manufacturer’s high altitude (Natural, Propane gas, and/ or Pressure Switch) kits. Do not derate the furnace by adjusting the manifold pressure to a lower pressure than specified on the furnace rating plate.
PRODUCT DESIGN 3. Use ground joint unions. 4. Install a drip leg to trap dirt and moisture before it can enter the gas valve. The drip leg must be a minimum of three inches long. 5. Install a 1/8" NPT pipe plug fitting, accessible for test gage connection, immediately upstream of the gas supply connection to the furnace. 6. Use two pipe wrenches when making connection to the gas valve to keep it from turning. The orientation of the gas valve on the manifold must be maintained as shipped from the factory. 7.
PRODUCT DESIGN For satisfactory operation, propane gas pressure must be 11 inch WC at the furnace manifold with all gas appliances in operation. Maintaining proper gas pressure depends on three main factors: 1. Vaporization rate, depending on temperature of the liquid, and “wetted surface” area of the container or containers. 2. Proper pressure regulation. (Two-stage regulation is recommended for both cost and efficiency). 3.
PRODUCT DESIGN When installing a propane storage tank, the contractor must consider proper tank sizing, safety, efficiency, ground characteristics and aesthetics. For a residential customer, the size may range from 100-1,000 gallons, depending on household use. Typically, a 500 gallon tank is ample for an average four-bedroom home. However, it is best to consult your local propane supplier to ensure the proper sizing for propane storage requirements.
PRODUCT DESIGN HUMIDIFIER WIRING Accessory wiring connections are to be made through the 1/4" quick connect terminals provided on the furnace integrated control module. The Humidifier and Electronic Air Cleaner hot and neutral terminals are identified as HUM and EAC. All field wiring must conform to applicable codes. Connections should be made as shown below.
PRODUCT DESIGN A duct system should be installed in accordance with Standards of the National Board of Fire Underwriters for the Installation of Air Conditioning, Warm Air Heating and Ventilating Systems, Pamphlets No. 90A and 90B. A return air filter is not supplied with the furnace. The installer must supply a means of filtering all of the return air. Filter(s) shall comply with UL900 or CAN/ULC-S111 Standards. If the furnace is installed without filters, the warranty will be voided.
PRODUCT DESIGN filter requirement charts for determination of the minimum filter area to ensure proper unit performance. The following figures show possible filter locations. NOTE: A ductwork access door must be used in counterflow applications to allow filter removal. If the filter rack is used, the side of the plenum must be at least as tall as dimension "A" shown in the following illustration. For dimension of "A" refer to the following chart.
PRODUCT DESIGN Cooling Mode The normal operational sequence in cooling mode is as follows: 1. R and Y thermostat contacts close, initiating a call for cool. 2. Integrated control module performs safety circuit checks. 3. Outdoor fan and compressor are energized. 4. Circulator blower is energized on cool speed following a fixed five (5) second on delay. Electronic air cleaner terminals are energized with circulator blower. 5.
SYSTEM OPERATION HEATING - Abnormal Operation The following presents the probable causes of questionable furnace operation and how to fix them. Look through the observation window in the blower access door and make a note of the number of flashes in sequence between pauses. Next, refer to the Troubleshooting Chart on the following pages for an interpretation of the LED signals and to the information in this section for a description of the problem. 1.
TROUBLESHOOTING TROUBLESHOOTING CHART Symptoms of Abnormal Operation Associated LED Code2 • Furnace fails to operate. • Integrated control module diagnostic LED provides no signal. NONE Fault Description(s) Fault Description(s) Possible Causes Possible Causes • No 115 volt power to • Manual disconnect furnace, or no 24 switch OFF, door switch volt power to open, or 24 volt wires integrated control improperly connected or module. loose. • Blown fuse or circuit • Blown fuse or circuit breaker. breaker.
TROUBLESHOOTING TROUBLESHOOTING CHART Symptoms of Abnormal Associated Operation LED Code2 • Circulator blower runs continuously. No furnace operation. • Integrated control module diagnostic LED is flashing FOUR (4) flashes. 4 Fault Description(s) Possible Causes Corrective Action • Primary or auxiliary limit circuit is open. • Faulty primary or auxiliary limit switch. • Insufficient conditioned air over the heat exchanger.
POLARIZATION AND PHASING INCOMING POWER METER READS METER READS 120 VOLTS 0 VOLTS As more and more electronic's are introduced to the Heating Trade, Polarization of incoming power and phasing of primary to secondary voltage on transformers becomes more important. VOLT / OHM METER VOLT / OHM METER GND GND Polarization has been apparent in the Appliance industry since the introduction of the three prong plug, however, the Heating Industry does not use a plug for incoming power, but is hard wired.
MAINTENANCE WARNING HIGH VOLTAGE DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. CAUTION IF YOU MUST HANDLE THE ITNITOR, HANDLE WITH CARE. T OUCHING THE IGNITOR BODY WITH BARE FINGERS, ROUGH HANDLING, OR VIBRATION COULD RESULT IN EARLY IGNITOR FAILURE. O NLY A QUALIFIED SERVICER SHOULD EVER HANDLE THE IGNITOR.
MAINTENANCE FLAME SENSOR (QUALIFIED SERVICER ONLY) Under some conditions, the fuel or air supply can create a nearly invisible coating on the flame sensor. This coating acts as an insulator, causing a drop in the flame sensing signal. If this occurs, a qualified servicer must carefully clean the flame sensor with steel wool. After cleaning, the flame sensor output should be as listed on the specification sheet. BURNERS WARNING HIGH VOLTAGE ELECTRICAL COMPONENTS ARE CONTAINED IN BOTH COMPARTMENTS.
MAINTENANCE gas and with proper inlet pressures and correct piping size, full capacity will be obtained. With propane gas, no unit gas valve regulator is used; however, the second stage supply line pressure regulator should be adjusted to give 11" water column with all other gas consuming appliances running. The dissipation of the heat transferred to the heat exchanger is now controlled by the amount of air circulated over its surface.
SERVICING 1 1 CUBIC FEET One GAS RATE -- CUBIC FEET PER HOUR Seconds for One Revolution 1/4 cu/ft 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 90 82 75 69 64 60 56 53 50 47 45 43 41 39 37 36 34 33 32 31 30 -28 -26 -- 44 Size of Test Dial 1/2 1 2 cu/ft cu/ft cu/ft 5 cu/ft 180 164 150 138 129 120 113 106 100 95 90 86 82 78 75 72 69 67 64 62 60 -56 -53 -- 1800 1636 1500 1385 1286 1200 1125 1059 1000 947 900 857 818 783 750 720 692 667 643 621 600 581 563 545 529 514
SERVICING Power Failure Blown Fuse Loose Connection Shorted or Broken Wires No Low Voltage Faulty Thermostat Faulty Transformer Poor or High Resistance Ground • • • • • • • • Faulty Ignition Control Gas Valve or Gas Supply Shut Off Faulty Induced Draft Blower Faulty Blower Motor (PSC & ECM) Broken or Shorted Ignitor Dirty Flame Sensor, Low UA Stuck Gas Valve Faulty Gas Valve Open Auxiliary Limit Improper Air Flow or Distribution Cycling on Limit Delayed Ignition • • • • • • • • • • • • • • • • • • •
SERVICING SERVICE NUMBERS S-1 CHECKING VOLTAGE................................................................................................................................. 47 S-2 CHECKING WIRING .................................................................................................................................... 47 S-3A THERMOSTAT AND WIRING .......................................................................................................................
SERVICING S-1 CHECKING VOLTAGE WARNING HIGH VOLTAGE DISCONNECT ALL POWER BEFORE SERVICING OR CHANGING ANY ELECTRICAL WIRING. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE CHECKING THERMOSTAT, WIRING AND ANTICIPATOR S-3A THERMOSTAT AND WIRING WARNING D ISCONNECT ALL POWER BEFORE SERVICING. PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. 1. Remove the burner door to gain entry to the Junction Box. 2. Remove cover from the Junction Box and gain access to incoming power lines.
SERVICING Cooling Anticipator The cooling anticipator is a small heater (resistor) in the thermostat. During the "OFF" cycle it heats the bimetal element helping the thermostat call for the next cooling cycle. This prevents the room temperature from rising too high before the system is restarted. A properly sized anticipator should maintain room temperature within 1 1/2 to 2 degrees. The anticipator is fixed in the subbase and is not to be replaced.
SERVICING S-200 WARNING HIGH VOLTAGE DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. 1. Remove blower compartment door to gain access to capacitor. 2. Discharge capacitor and remove wire leads. 3. Set an ohmmeter on its highest ohm scale and connect the leads to the capacitor. a. Good Condition - indicator swings to zero and slowly returns toward infinity. b.
SERVICING S-201 CHECKING TEMPERATURE RISE The more air (CFM) being delivered through a given furnace, the less the rise will be; so the less air (CFM) being delivered, the greater the rise. The temperature rise should be adjusted in accordance to a given furnace specifications and its external static pressure. An incorrect temperature rise may result in condensing in or overheating of the heat exchanger. An airflow and temperature rise table is provided in the blower performance specification section.
SERVICING VOLT / OHM METER RED RESET BUTTON COLOR IDENTIFYING TAB Testing Auxiliary Limit Control Testing Primary Limit Control S-301 CHECKING AUXILIARY LIMIT CONTROL WARNING TO AVOID POSSIBLE FIRE, ONLY RESET THE AUXILIARY LIMIT CONTROL ONCE. I F IT SHOULD OPEN A SECOND TIME, A QUALIFIED SERVICER MUST DETERMINE WHY THE AUXILIARY LIMIT OPENED BEFORE RESETTING AGAIN.
SERVICING The control is designed to open should a flame roll out occur. An over firing condition or flame impingement on the heat shield may also cause the control to open. If the rollout control opens, the air circulation blower will run continuously. On single-stage 80% and 90% models, the ignition control diagnostic light will flash (6) six times indicating a trip of the rollout switch. WARNING LINE VOLTAGE NOW PRESENT 1.
SERVICING A GAS STREAM B .023" - .027" Beckett Burner WARNING The length of Dimension "A" determines the angle of Gas Stream "B". DENT OR BURR DISCONNECT ALL GAS AND ELECTRICAL POWER SUPPLY. In checking main burners, look for signs of rust, oversized and undersized carry over ports restricted with foreign material, etc, refer to previous drawing. Burner cross-over slots must not be altered in size. S-306 CHECKING ORIFICES A predetermined fixed gas orifice is used in all of these furnaces.
SERVICING NOTE: At either location, a hose fitting must be installed prior to making the hose connection. NOTE: Use apapter kit #0151K00000S to measure gas pressure on White-Rodgers 36J22 gas valves. GAS LINE Gas Manifold Pressure Measurement and Adjustment eca n CAUTION TO PREVENT UNRELIABLE OPERATION OR EQUIPMENT DAMAGE, THE GAS MANIFOLD PRESSURE MUST BE AS SPECIFIED ON THE UNIT GAS SHUTOFF VALVE RATING PLATE. ONLY MINOR ADJUSTMENTS SHOULD BE MADE BY ADJUSTING THE GAS VALVE PRESSURE REGULATOR.
SERVICING b. Attach a hose and manometer to the outlet pressure outlet pressure boss. c. Turn ON the gas supply. d. Turn on power and close thermostat “R” and “W1” contacts to provide a call for low stage heat. e. Measure the gas manifold pressure with burners firing. Adjust manifold pressure using the Manifold Gas Pressure table shown below. f. Remove regulator cover screw from the outlet pressure regulator adjust tower and turn screw clockwise to increase pressure or counterclockwise to decrease pressure.
SERVICING 1. Remove burner compartment door to gain access to the ignitor. 2. Ignitor cool - approximately 70 - 77°F. 3. Disconnect the ignitor from the Ignition Control. 4. Using an ohmmeter measure the resistance of the ignitor: Mini Igniter : Carbide Mini Igniter should read between 30 to 300 ohms. 5. Reconnect ignitor. WARNING 1. Remove burner compartment door to gain access to pressure switch(es). 2. Remove wires from the pressure switch(es) electrical terminals. 3.
SERVICING For installations above 4500/5500 feet, please refer to your distributor for required kit(s). Contact the distributor for a tabular listing of appropriate manufacturer’s kits for propane gas and/or high altitude installations. The indicated kits must be used to insure safe and proper furnace operation. All conversions must be performed by a qualified installer, or service agency. In some areas the gas supplier may artificially derate the gas in an effort to compensate for the effects of altitude.
SERVICING S-314 CHECKING FLAME SENSOR A flame sensing device is used in conjunction with the ignition control module to prove combustion. If proof of flame is not present the control will de-energize the gas valve and "retry" for ignition or lockout. The following drawings illustrate from a bottom view, the approximate distances for the ignitor and flame sensor to the gas inshot burner. You will note they are in the main burner stream, not in the carry over ports as shown in the following figure.
