Service Instructions Goodman® Brand GMEC96 & Amana® Brand AMEC96 Two Stage Furnace with multi-speed ECM Motor 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 manufacturers installation and operation instructions.
TABLE OF CONTENTS IMPORTANT INFORMATION ......................... 2 - 6 ACCESSORIES .......................................... 34 - 37 PRODUCT IDENTIFICATION ........................ 7 - 8 SERVICING TABLE OF COnTENTS ................. 38 INSTALLATION CONSIDERATIONS ........... 9 - 26 SERVICING .. .............................................. 39 - 56 SYSTEM OPERATION ...............................27 - 33 MAINTENANCE ............................................
IMPORTANT INFORMATION DANGER CARBON MONOXIDE POISONING HAZARD Special warning for installation of furnaces or air handling units in enclosed area such as garages, utility rooms or parking areas. Carbon monoxide producing devices (such as automobile, space heater, gas water heater, etc.) Should not be operated in enclosed areas such as unventilated garages or utility rooms because of the danger of carbon monoxide (CO) poisoning resulting from the exhaust emissions.
IMPORTANT INFORMATION 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.
IMPORTANT INFORMATION CONSIGNES DE SECURITE - LIRE AVANT D'ALLUMER L'APPAREIL INSTRUCTIONS DE SERVICE AVERTISSEMENT: Le non-respect des instructions qui suivent peut ^ entrainer un risque d'incendie ou d'explosion causant des dommages, des blessures ou la mort. A. Cet appareil comporte pas de veilleuse. Il est muni d'un mecanisme qui allume ^ ^ manuellement. automatiquement le bruleur. N'allumez paz le bruleur B. Sentir tout autour de l'appariel AVANT D'ALLUMER afin de deceler toute fuite de gaz.
IMPORTANT INFORMATION ROBINET A GAZ MANUEL, EN POS "ON/MARCHE" GAS INLET ARRIVEE DU GAZ MANUAL GAS LEVER SHOWN IN "ON" POS 6
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. * M E C 96 060 3 B N A A 1 2 3 4 5,6 7,8,9 10 11 12 13 14 Brand AA - -Amana fi Brand Am ana® Brand G fi Brand G- -Goodman Goodm an® Brand M ot or NOx AFUE M BTU/ h MODEL # MFG.
PRODUCT IDENTIFICATION MODEL # AFE18-60A AMU1620 AMU1625 AMU2020 AMU2025 GMU1620 GMU1625 GMU2020 GMU2025 ASAS-10 ASAS-11 ASAS-12 ASAS-18 8 MFG # DESCRIPTION N/A Fossil Fuel Kit. The AFE18-60A control is designed for use where the indoor coil is located above/downstream of a gas or fossil fuel furnace when used with a heat pump. It will operate with single and two stage heat pumps and single and two stage furnaces. The AFE18-60A control will turn the heat pump unit off when the furnace is turned on.
INSTALLATION CONSIDERATIONS Introduction This is a Category lV furnace. This furnace uses a pressurized venting system and must be installed per National and local codes requirements and the installation manual that was shipped with the furnace. The *MEC96 34.5" furnace is one of the products in our newly redesigned line of shorter chassis furnaces. It is available in the following sizes and suitable for up flow / horizontal installation.
INSTALLATION CONSIDERATIONS WARNING TO PREVENT PROPERTY DAMAGE, PERSONAL INJURY OR DEATH DUE TO FIRE, DO NOT INSTALL THIS FURNACE IN A MOBILE HOME, TRAILER, OR RECREATIONAL VEHICLE. To ensure proper furnace operation, install, operate, maintain and service the furnace in accordance with the installation, operation and service instructions, all local building codes and ordinances. In their absence, follow the latest edition of the National Fuel Gas Code (NFPA 54/ANSI Z223.
INSTALLATION CONSIDERATIONS • • • cleaning solutions (such as perchloroethylene) printing inks paint removers varnishes hydrochloric acid cements and glues antistatic fabric softeners for clothes dryers and masonry acid washing materials Isolate a non-direct vent furnace if it is installed near an area frequently contaminated by any of the above substances. This protects the non-direct vent furnace from airborne contaminants.
INSTALLATION CONSIDERATIONS Furnace Suspension If suspending the furnace from rafters or joist, use 3/8" threaded rod and 2”x2”x1/8” angle iron as shown in the following figure. If the furnace is installed in a crawl space it must also be suspended from the floor joist or supported by a concrete pad. Never install the furnace on the ground or allow it to be exposed to water. The length of rod will depend on the application and the clearances necessary.
INSTALLATION CONSIDERATIONS space with other gas appliances, such as a water heater, ensure there is an adequate supply of combustion and ventilation air for the other appliances. Refer to the latest edition of the National Fuel Gas Code NFPA 54/ANSI Z223.1 (Section 9.3), or CAN/CGA B149 Installation Codes (Sections 7.2, 7.3, or 7.4), or applicable provisions of the local building codes for determining the combustion air requirements for the appliances.
INSTALLATION CONSIDERATIONS 9.3.3.1 Two Permanent Openings Method. Two permanent openings, one commencing within 12 in. (300 mm) of the top and one commencing within 12 in. (300 mm) of the bottom, of the enclosure shall be provided.
INSTALLATION CONSIDERATIONS (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. Engineered combustion air installations shall provide an adequate supply of combustion, ventilation, and dilution air and shall be approved by the authority having jurisdiction. 9.3.
INSTALLATION CONSIDERATIONS Insert f lange. Cut 2 ½” long. RF000142 Leveling Leveling ensures proper condensate drainage from the heat exchanger and induced draft blower. For proper flue pipe drainage, the furnace must be level lengthwise from end to end. The furnace should also be level from back to front or have a slight tilt with the access doors downhill (approximately 3/4") from the back panel.
INSTALLATION CONSIDERATIONS Freeze Protection If the drain trap and drain line will be exposed to temperatures near or below freezing, adequate measures must be taken to prevent condensate from freezing. NOTE: The use of insulation and/or heat tape is recommended. Failure to provide proper condensate drainage can result in property damage. Propane Gas and/or High Altitude Installations WARNING POSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH MAY OCCUR IF THE CORRECT CONVERSION KITS ARE NOT INSTALLED.
INSTALLATION CONSIDERATIONS • The vent termination of vent pipe run vertically through a roof must terminate at least 12 inches above the roof line (or the anticipated snow level) and be at least 12 inches from any vertical wall (including any anticipated snow build up). • A vent termination shall not terminate over public walkways or over an area where condensate or vapor could create a nuisance or hazard or could be detrimental to the operation of regulators, relief valves, or other equipment.
INSTALLATION CONSIDERATIONS 10”- 24” NOTE: Terminate both pipes in the same pressure zone (same side of roof, no major obstacles between pipes, etc.). 6” MAX TEE (OPTIONAL) COMBUSTION AIR INTAKE (OPTIONAL) 12” MIN HEIGHT DIFFERENCE BETWEEN INTAKE AND VENT *Not required for single pipe installation 4” MIN 90º OR 45° ELBOW SCREEN (OPTIONAL) OF RO E LIN 12" MIN. TO GRADE OR HIGHEST ANTICIPATED SNOW LEVEL INTAKE SCREEN OPTIONAL 9 X. MA ” 6 IN.
INSTALLATION CONSIDERATIONS VENT/INTAKE TERMINATIONS FOR INSTALLATION OF MULTIPLE DIRECT VENT FURNACES If more than one direct vent furnace is to be installed vertically through a common roof top, maintain the same minimum clearances between the exhaust vent and air intake terminations of adjacent units as with the exhaust vent and air intake terminations of a single unit.
INSTALLATION CONSIDERATIONS Vent Combustion Air CAUTION Maintain 12" (18" for Canada) minimum clearance above highest anticipated snow level. Maximum of 24" above roof. TO PREVENT UNRELIABLE OPERATION OR EQUIPMENT DAMAGE, THE INLET GAS SUPPLY PRESSURE MUST BE AS SPECIFIED ON THE UNIT RATING PLATE WITH ALL OTHER HOUSEHOLD GAS FIRED APPLIANCES OPERATING.
INSTALLATION CONSIDERATIONS PROPANE GAS CONVERSION WARNING POSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH MAY OCCUR IF THE CORRECT CONVERSION KITS ARE NOT INSTALLED. THE APPROPRIATE KITS MUST BE APPLIED TO INSURE SAFE AND PROPER FURNACE OPERATION. ALL CONVERSIONS MUST BE PERFORMED BY A QUALIFIED INSTALLER OR SERVICE AGENCY. This unit is configured for natural gas. The appropriate manufacturer’s propane gas conversion kit, must be applied for propane gas installations.
INSTALLATION CONSIDERATIONS GAS PIPING CHECKS Before placing unit in operation, leak test the unit and gas connections. WARNING TO AVOID THE Complete information regarding tank sizing for vaporization, recommended regulator settings, and pipe sizing is available from most regulator manufacturers and propane gas suppliers. Refer to the following illustration for typical propane gas installations and piping. POSSIBLITY OF EXPLOSION OR FIRE, NEVER USE A MATCH OR OPEN FLAME TO TEST FOR LEAKS.
INSTALLATION CONSIDERATIONS WARNING IF THE INFORMATION IN THESE INSTRUCTIONS IS NOT FOLLOWED EXACTLY, A FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE. – 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.
INSTALLATION CONSIDERATIONS Use a separate fused branch electrical circuit containing properly sized wire, and fuse or circuit breaker. The fuse or circuit breaker must be sized in accordance with the maximum overcurrent protection specified on the unit rating plate. An electrical disconnect must be provided at the furnace location. NOTE: Line polarity must be observed when making field connections.
INSTALLATION CONSIDERATIONS Y2 W1 W2 Y W1 W2 Room Thermost at Furnace 1 Furnace 2 Y2 Ylo Ylo Y Y Y W W W W2 W2 W2 R R R G G G C C C Fur nace Int egrat ed Cont r ol Module Y2 Remot e Condensing Unit (Tw o-St age Cooli ng) Thermostat - Two-Stage Heating with Two-Stage Cooling Thermostat Wiring Diagrams SINGLE-STAGE HEATING THERMOSTAT APPLICATION A single-stage thermostat with only one heating stage may be used to control this furnace.
SYSTEM OPERATION 8. Heating input (W1/ W2) always has priority over all other thermostat input. 9. Cooling input (YLo/ Y) has priority over continuous fan input. 10. Continuous fan input (G) has lowest priority. *The blower speed wiring connections must remain in factory position. 1. Refer to the air flow table for your specific model furnace 2.
SYSTEM OPERATION DIP SWITCH SETTING *MEC960302BN FACTORY SETTING 0.1 0.2 0.3 0.4 0.5 CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM CFM CFM 658 548 469 413 0.6 0.7 0.
SYSTEM OPERATION DIP SWITCH SETTING *MEC960603BN FACTORY SETTING 0.1 0.2 0.3 0.4 0.5 CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM CFM CFM 846 780 720 660 0.6 0.7 0.
SYSTEM OPERATION DIP SWITCH SETTING *MEC961004CN FACTORY SETTIN G 0.1 0.2 0.3 0.4 0.5 CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM CFM CFM 1464 1402 1338 1280 1230 1167 1101 0.6 0.7 0.
SYSTEM OPERATION UPRIGHT FILTER INSTALLATIONS Depending on the installation and/or customer preference, differing filter arrangements can be applied. Filters can be installed in the central return register and a side panel external filter rack kit (upflow filter kit # EFR02 As an alternative a media air filter or electronic air cleaner can be used as the requested filter. Refer to the following minimum filter requirement charts for determination of the minimum filter area to ensure proper unit performance.
SYSTEM OPERATION CALL FOR 2ND STAGE AFTER FIRST STAGE: . · · · The inducer motor is enabled at high speed. The pressure switches are checked for closure. Closure of the second stage pressure switch will energize the high fire stage of the gas valve. The high speed circulator output is energized. NOTE: A call for 2nd stage without a call for 1st stage will be ignored, and a three amber flash code will be displayed on the LED. This error code will only be stored in memory once during a single power cycle.
SYSTEM OPERATION COOLING MODE: LOW STAGE COOLING MODE SEQUENCE: · · · · · · · On a call for lo cool, the Ylo and G thermostat contacts close signaling the control module. The LED will display a “GREEN”1 flash The compressor and condenser fan are energized. The compressor is connected to the Ylo terminal of the control module. The circulator fan is energized at lo cool speed after a cool on delay. The electronic air cleaner will also be energized.
ACCESSORIES GME95 & AMEH96 FURNACE ACCESSORIES MO DEL NUMBER EFR0 2 AFE18 - 6 0 A AMU / G MU AS AS / G S AS 0 17 0 K0 0 0 0 0 S 0 17 0 K0 0 0 0 1S De sc ription EFR Exte rna l Filte r Ra c k Dua l Fue l Kit Me dia Air Cle a ne rs Ele c tronic Air Cle a ne r Conc e ntric S ide Wa ll Flush Mount V e nt Kit (3 ") Conc e ntric S ide Wa ll Flush Mount V e nt Kit (2 ") * MEC9 6 0 3 0 2 BNAA ● ● ● ● ● ● * MEC9 6 0 4 0 2 BNAA ● ● ● ● ● ● * MEC9 6 0 6 0 3 BNAA ● ● ● ● ● ● * MEC9 6
ACCESSORIES EXTERNAL FILTER RACK KIT ( EFR02 ) EFR01 EXTERNAL FILTER RACK KIT SLOTS IN FILTER CLEAR SCREWS ON UNIT Used on Models 90% Upflow Model Furnaces 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 SIDE WALL VENT KIT (0170K00000S/0170K00001S) Description This side wall only vent kit #0170K00000S is to be used with 2” - 3” vent systems.
ACCESSORIES CONCENTRIC VENT CONVERSION KIT ( DCVK-20 DCVK-30 ) ( CVENT-2 ) ( CVENT-3 ) Vent The DCVK-20 (2") or the DCVK30 (3") is a concentric vent kit approved with furnaces listed in Combustion Air this manual. This concentric vent kit allows for Roof Boot/Flashing vertical or horizontal vent termination. The illustrations give a brief(Field Supplied) view of the kit and its application.
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.
SERVICING SERVICE NUMBERS S-1 CHECKING VOLTAGE ................................................................................................................................. 45 S-2 CHECKING WIRING .................................................................................................................................... 45 S-3A S-3B THERMOSTAT AND WIRING .......................................................................................................................
SERVICING 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. INCOMING POWER METER READS METER READS 120 VOLTS 0 VOLTS 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.
SERVICING 1 1 CUBIC FEET One GAS RATE -- CUBIC FEET PER HOUR Size of Test Dial 5 cu/ft Seconds for One Revolution 1/4 cu/ft 1/2 cu/ft 1 cu/ft 2 cu/ft 5 cu/ft 720 1800 36 25 50 100 200 500 327 300 655 600 1636 1500 37 38 -23 -47 97 95 195 189 486 474 138 129 277 257 555 514 1385 1286 39 40 -22 -45 92 90 185 180 462 450 60 56 120 113 240 225 480 450 1200 1125 41 42 -21 -43 -86 176 172 439 429 53 106 212 424 1059 -- -- -- 167 419 50 47 100 95 200 18
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) 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 • • • • • • • • • • • • • • • • • • • • • • •
TROUBLESHOOTING Symptoms Green Amber Red LED Code LED Code LED Code Fault Description • Def ect ive disconnect sw it ch • Furnace f ails t o operat e • Cont rol board LED is of f • None • None • None • def ect ive door sw it ch • No 115 volt pow er • No 24 volt pow er • Furnace is w ait ing f or a call • Furnace f an only is running • Solid ON • None • Rapid Flash • None • None • None • Normal operat ion w it h • One low st age call f or cooling repeat ing (Ylo & G) • None • None f la
TROUBLESHOOTING Symptoms Green Amber Red LED Code LED Code LED Code Fault Description Check • Temperat ure rise, duct stat ic, Cautions • Conf irm elect rically saf e • Four • Open limit circuit , main repeat ing limit , aux limit , or roll out f lashes on cont rol board f lashes sw it ch • Furnace does not • Five • Limit & rollout circuit open Temperat ure rise, duct st at ic, repeat ing f or 15 minut es.
DIAGNOSTIC CHART Refer to the Troubleshooting Chart in the back of this manual for assistance in determining the source of unit operational problems. External Lockout A control lockout resulting from an external fault sensed by the control, such as an unsuccessful recycle or retry period, or a limit trip. Once in External Lockout, the control will shut down for a period of one hour before attempting another trial for ignition. Internal Lockout A failure internal to the control board.
SERVICING S-1 CHECKING VOLTAGE CHECKING THERMOSTAT, WIRING AND ANTICIPATOR 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 S-3A THERMOSTAT AND WIRING WARNING DISCONNECT ALL POWER BEFORE SERVICING. PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. 1. Remove cover from the Junction Box and gain access to incoming power lines. With Power ON: WARNING LINE VOLTAGE NOW PRESENT 2.
SERVICING S-4 CHECKING TRANSFORMER AND Control CIRCUIT S-16A CHECKING AIR CIRCULATOR BLOWER MOTOR (MULTI-SPEED ECM MOTOR) A step-down transformer 120 volt primary to 24 volt secondary, 40 VA (Heating and Cooling Models) supplies ample capacity of power for either operation. WARNING DISCONNECT ALL POWER BEFORE SERVICING. WARNING HIGH VOLTAGE DISCONNECT ALL POWER BEFORE SERVICING OR CHANGING ANY ELECTRICAL WIRING. MULTIPLE POWER SOURCES MAY BE PRESENT.
SERVICING To determine proper air movement, proceed as follows: 1. With clean filters in the furnace, use a draft gauge (inclined manometer) to measure the static pressure of the return duct at the inlet of the furnace. (Negative Pressure) 2. Measure the static pressure of the supply duct. (Positive Pressure) 3. Add the two (2) readings together for total external static pressure. NOTE: Both readings may be taken simultaneously and read directly on the manometer if so desired.
SERVICING PRIMARY LIMIT CONTROL * * * * 2 * * * Primary Limit Control Location (90% Upflow Furnace Shown) The following drawing illustrates the style of limit switches used on the 90% furnaces. If the limit circuit opens five times within a single call for heat, the furnace will go into lockout for one hour. The RED LED will display a FOUR flash code during this time. The control board can be reset by cycling 115 volt power to the furnace.
SERVICING AUXILIARY LIMIT CONTROL VOLT / OHM METER BLOWER HOUSING RED RESET BUTTON AUXILIARY LIMIT CONTROL Auxiliary Limit Control Location COLOR IDENTIFYING TAB Testing Auxiliary Limit Control 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 the auxiliary. 2.
SERVICING 302 CHECKING FLAME ROLLOUT CONTROL 7. After check and/or replacement of rollout switch, rein- A temperature activated manual reset control is mounted to the manifold assembly as shown in the following illustration. FLAME ROLLOUT SWITCHES stall burner compartment door and verify proper unit operation. S-303 INDUCED DRAFT BLOWER Motor WARNING HIGH VOLTAGE DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT.
SERVICING S-306 Two stage gas valves always require 24 volts between common and low fire (main coil) to open. Also, the furnace front cover pressure switch is wired in series with the low (main) solenoid of the gas valve. In the event of a non functioning gas valve, always check the front cover pressure switch. Also see section S-307 on Checking Gas Pressure and section S-310 on Checking Pressure Switches S-305 CHECKING MAIN BURNERS BURNERS Burners have been redesigned for 34.5" chassis furnaces.
SERVICING INLET OUTLET 6. Turn OFF any unnecessary gas appliances stated in step 3. Gas Valve On/Off Selector Switch GAS MANIFOLD PRESSURE MEASUREMENT AND ADJUSTMENT Only small variations in gas pressure should be made by adjusting the gas valve pressure regulator. The manifold pressure must be measured with the burners operating. To measure and adjust the manifold pressure, use the following procedure.
SERVICING 6. Turn on power and close thermostat “R” and “W1” contacts to provide a call for low stage heat. Regulator Vent 7. Measure the gas manifold pressure with burners firing. Adjust manifold pressure using the Manifold Gas Pressure table shown below. 8. Remove regulator cover screw from the low (LO) outlet pressure regulator adjust tower and turn screw clockwise to increase pressure or counterclockwise to decrease pressure. Replace regulator cover screw. 9.
SERVICING e. Remove the 1/8" NPT hose barb fitting from the outlet pressure tap. Replace the outlet pressure boss plug and seal with a high quality thread sealer. S-309 CHECKING FOR FLASHBACK WARNING HIGH VOLTAGE DISCONNECT ALL ELECTRICAL POWER AND SHUT OFF GAS SUPPLY BEFORE SERVICING OR INSTALLING. 2. Turn on gas to furnace and check for leaks. If leaks are found, repair and then reinstall burner compartment door. 3. Turn on electrical power and verify proper unit operation.
SERVICING INDUCED DRAFT BLOWER PRESSURE SWITCH PRESSURE SWITCH HOSE OPEN TO * * ATMOSPHERE * M 1 P 3 O F F * C S-313 CHECKING INTEGRATED IGNITION CONTROL BOARDS 2 ON * * 3. Carry over (lighter tube or cross lighter) obstructed - clean. 4. Main burner orifice(s) deformed, or out of alignment to burner - replace.
E2 0 E19 K8 HUM E2 8 E18 XFMR E16 E2 1 HIGH VOLTAGE DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY ST2 RV 2 R8 9 R88 R9 4 R9 7 R9 5 R96 W18 R9 2 DAMAGE, PERSONAL INJURY OR DEATH. K10 Q3 Q2 W3 9 W35 Q7 2 W3 Q7 1 K6 R2 01 R2 02 E3 5 R58 6 Q7 FLAME CURRENT R5 88 W15 R39 W1 W19 R49 W10 R204 K4 E36 W16 R4 0 C14 E4 0 + R5 0 R60 W33 Q5 W34 W11 Q7 0 C6 0 R58 2. Putting a D.C.
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 IG NITOR BODY WITH BARE FINGERS, ROUG H HANDLING, OR VIBRATIO N COULD RESULT IN EARLY IGNITO R FAILURE. O NLY A Q UALIFIED SERVICER SHOULD EVER HANDLE THE IGNITO R.
MAINTENANCE CONDENSATE DRAINAGE SYSTEM (QUALIFIED SERVICER ONLY) The drain tubes, standpipe, and field supplied drain line must be checked annually and cleaned as often as necessary to ensure proper condensate drainage. 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.
