Daikin ComfortNet DM96VC Service Instructions Manual

34.5" chassis gas furnaces

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Installation instructions manual (56 pages)

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This manual is to be used by qualified, professionally trained HVAC technicians only. Daikin 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.

Service Instructions

34.5" Chassis

DC96VC/DM96VC

Gas Furnaces

Our continuing commitment to quality products may mean a change in specifications without notice.

5151 San Felipe St., Suite 500, Houston, TX 77056

www.daikincomfort.com

RSD6612010r5

June 2017

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Summary of Contents for Daikin ComfortNet DM96VC

Page 1 DC96VC/DM96VC Gas Furnaces This manual is to be used by qualified, professionally trained HVAC technicians only. Daikin does not assume any responsibility for property damage or personal injury due to improper service procedures or services performed by an unqualified person.
Page 2: Table Of Contents
TABLE OF CONTENTS SYSTEM OPERATION COMFORTNET™ .... 51 - 56 IMPORTANT INFORMATION ........2 - 6 PRODUCT IDENITIFICATION ........7 - 10 SERVICING ............57 - 75 ACCESSORIES ............ 11 - 13 MAINTENANCE ........... 76 - 78 INSTALLATION CONSIDERATIONS ...... 14 - 39 ACCESSORY WIRING DIAGRAMS .....
Page 3: Important Information
IMPORTANT INFORMATION To locate an authorized servicer, please consult your telephone book or the dealer from whom you purchased this product. For further assistance, please contact: CONSUMER INFORMATION LINE DAIKIN PRODUCTS TOLL FREE 1-855-770-5678 (U.S. only) email us at: customerservice@daikincomfort.com fax us at: (731) 856-1821 (Not a technical assistance line for dealers.)
Page 4 IMPORTANT INFORMATION CO can cause serious illness including permanent brain damage or death. B10259-216 Advertencia especial para la instalación de calentadores ó manejadoras de aire en áreas cerradas como estacionamientos ó cuartos de servicio. Las emisiones de monóxido de carbono pueden circular a través del aparato cuando se opera en cualquier modo.
Page 5: For Your Safety Read Before Operating
IMPORTANT INFORMATION FOR YOUR SAFETY READ BEFORE OPERATING WARNING: Improper If you do not follow these instructions exactly, alteration, service or a fire or explosion may result causing property maintenance can damage, personal injury or loss of life. cause injury or property damage.
Page 6: Instructions De Service
IMPORTANT INFORMATION CONSIGNES DE SECURITE - LIRE INSTRUCTIONS DE SERVICE AVANT D'ALLUMER L'APPAREIL 1. UN INSTANT! Lisez d'abord les consignes de securite ci-dessus. 2. Reglez le thermostat a son point le plus bas. AVERTISSEMENT: Le non-respect des instructions qui suivent peut 3.
Page 7: Product Idenitification
COMMUNICATION FEATURE 5: 2000 C: 4-Wire Communication Ready MODEL: DC96VC REV AA MODEL: DM96VC REV AA Equipment Type Daikin Residential Gas Furnace Equipment Type Daikin Residential Gas Furnace Heating Stages Heating Stages Cooling Stages Cooling Stages Control Type ClimateTalk ™ or Conventional 24 Volt Control Type ClimateTalk ™...
Page 8 Communicating Thermostat Kit- Digitally communicating touchscreen thermostat. Designed for use with compatible Daikin Air Handlers or Furnaces and outdoor split AC or Heat Pump units. This thermostat supports up to three stages of heat, two stages of cooling, dual fuel...
Page 9 PRODUCT IDENTIFICATION MODEL # MFG # DESCRIPTION Communicating Thermostat Kit- Di gi ta ll y communi ca ting thermos ta t. Des i gned for use wi th compa ti bl e Dai ki n Ai r Ha ndl ers or Furnaces and outdoor s pl i t AC or Hea t Pump uni ts .
Page 10 PRODUCT IDENTIFICATION MODEL # MFG # DESCRIPTION External Filter Rack Kit. For us e with Da i kin 90% upfl ow va ria bl e s peed ga s furna ce model s . Thi s ki t is i ntended to provide a loca tion, externa l to the furna ce ca s ing, for i ns ta l la tion of a EFR02 perma nent fi lter.
Page 11: Accessories
ACCESSORIES 96% Com Furnace Accessories Model AFE180-60A AMU / GMU EFR02 ASAS / GSAS CFSB17 CFSB21 CFSB24 RF000142 Num ber Fossil External Electronic Dow nflow Dow nflow Dow nflow Drain Media Air Description Fuel Filter Subbase Subbase Subbase Coupling Cleaners Rack Cleaner 17.5"...
Page 12 ACCESSORIES SLOTS IN FILTER EXTERNAL FILTER RACK (EFR02) CLEAR SCREWS ON UNIT BLOWER DECK 96% Upflow Model Furnaces SCREWS UNIT SIDE PANEL FRONT OF UNIT FILTER RACK ASSEMBLY (FACE FILTER OPENING BASE TOWARDS FRONT OF UNIT OF UNIT) RETURN AIR CUTOUT AREA LOWER EDGE SCREW...
Page 13 ACCESSORIES CONCENTRIC VENT CONVERSION KIT The CVENT-2 (DCVK20) (2") or the CVENT-3 (DCVK-30) (3") is a concentric vent kit approved with furnaces listed in this manual. This concentric vent kit allows for vertical or horizontal vent termination. The illustrations give a brief view of the kit and its application.
Page 14: Installation Considerations
O PREVENT PERSONAL INJURY OR DEATH DUE TO IMPROPER INSTALLATION, must be installed with the installation instructions. ADJUSTMENT, ALTERATION, SERVICE OR MAINTENANCE, REFER TO THIS Daikin 90% furnaces are ETL certified appliances and are MANUAL. OR ADDITIONAL ASSISTANCE OR INFORMATION, CONSULT A appropriate for use with natural or propane gas.
Page 15 INSTALLATION CONSIDERATIONS National Fire Protection Association • Set the 90% furnace on a level floor to enable proper condensate drainage. If the floor becomes wet or damp 1 Batterymarch Park at times, place the furnace above the floor on a con- Quincy, MA 02169-7471 crete base sized approximately 1-1/2"...
Page 16: Existing Furnace Removal
INSTALLATION CONSIDERATIONS • If the furnace is installed in a residential garage, posi- PROVIDE 8" MINIMUM CLEARANCE BETWEEN CENTER ROD AND FURNACE CABINET tion the furnace so that the burners and ignition source TO ALLOW FOR CIRCULATOR BLOWER REMOVAL. are located not less than 18 inches (457 mm) above ASSURE FURNACE IS LEVEL FROM ALTERNATE 3/8"...
Page 17: Combustion And Ventilation Air Requirements
INSTALLATION CONSIDERATIONS tions - 24 Volt Dehumidistat Wiring section in this manual If resizing is required on any portion of the venting system, or the installation instructions for correct installation proce- use the appropriate table in Appendix G in the latest edition dure.
Page 18 INSTALLATION CONSIDERATIONS Most homes will require outside air be supplied to the fur- (2) For fan-assisted appliances, calculate using the following equation: nace area by means of ventilation grilles or ducts connect- 15 ft Required Volume > ________ _________ ing directly to the outdoors or spaces open to the outdoors 1000 Btu/hr such as attics or crawl spaces.
Page 19 INSTALLATION CONSIDERATIONS (1)*Where directly communicating with the outdoors or where commu- Chimney or Gas Vent nicating to the outdoors through vertical ducts, each opening shall have a minimum free area of 1 in. /4000 Btu/hr (550 min /kW) of total input rating of all appliances in the enclosure. [See Figure NOTE: The air duct openings must have a free area of not A.9.3.3.1(1)(a) and Figure A.9.3.3.1(1)(b).]...
Page 20 INSTALLATION CONSIDERATIONS 9.3.8.4 Ducts shall not serve both upper and lower combustion air (c) The minimum size of outdoor opening(s) shall be the full size openings where both such openings are used. The separation between of outdoor opening(s) calculated in accordance with 9.3.3, ducts servicing upper and lower combustion air openings shall be main- multiplied by the reduction factor.
Page 21 INSTALLATION CONSIDERATIONS Installation Positions DM96VC models may be installed up flow or horizontally with left or right side down. DC96VC models may be in- stalled down flow or horizontally with left or right side down. Do not install any furnace on its back. Horizontal Installations 1.
Page 22: Vent/Flue Pipe And Combustion Air Pipe
INSTALLATION CONSIDERATIONS A condensing gas furnace achieves its high level of efficiency Alternate Electrical and Gas Line Connections by extracting almost all of the heat from the products of The furnaces have provisions allowing for electrical and gas combustion and cooling them to the point where condensa- line connections through either side panel.
Page 23 INSTALLATION CONSIDERATIONS • The vent termination of vent pipe run vertically through a roof must terminate at least 12 inches above the WARNING roof line (or the anticipated snow level) and be at least 12 inches from any vertical wall (including any antici- HE RUBBER ELBOW IS NOT DESIGNED TO SUPPORAT A LOAD.
Page 24 INSTALLATION CONSIDERATIONS take and a vent/flue pipe. The pipes may be run horizontally inside and outside of the wall. The wall penetration should and exit through the side of the building or run vertically and be sealed with silicone caulking material. exit through the roof of the building.
Page 25 INSTALLATION CONSIDERATIONS 10”- 24” Vent/Flue and Combustion Air Pipe Terminations Vent/Flue and Combustion Air Pipe Terminations The vent/flue and combustion air pipes may terminate verti- cally, as through a roof, or horizontally, as through an out- 6” MAX side wall. Vertical pipe terminations should be as shown in the follow- 4”...
Page 26: Gas Supply And Piping
INSTALLATION CONSIDERATIONS stalled in the drain line, near the cooling coil, to relieve NTAKE ERMINATIONS NSTALLATION OF ULTIPLE positive air pressure from the coil’s plenum. This is nec- IRECT URNACES essary to prohibit any interference with the function of the If more than one direct vent furnace is to be installed verti- furnace’s drain trap.
Page 27: Propane Gas Conversion
INSTALLATION CONSIDERATIONS In some areas the gas supplier may artificially derate the gas in an effort to compensate for the effects of altitude. If the gas is artificially derated, the appropriate orifice size must be determined based upon the BTU/ft content of the derated gas and the altitude.
Page 28 INSTALLATION CONSIDERATIONS Natural Gas Capacity of Pipe In Cubic Feet of Gas Per Hour (CFH) Length of Nominal Black Pipe Size Pipe in Feet 1/2" 3/4" 1" 1 1/4" 1 1/2" 1050 1600 1100 (Pres sure 0. 5 ps ig or less and pressure drop of 0. 3" W.C. ; Based on 0. 60 Specific Gravity Gas) BTUH Furnace Input CFH = Heating Value of Gas (BTU/Cubic Foot)
Page 29: Gas Piping Checks
INSTALLATION CONSIDERATIONS GAS PIPING CHECKS All propane gas equipment must conform to the safety stan- dards of the National Board of Fire Underwriters, NBFU Before placing unit in operation, leak test the unit and gas Manual 58. connections. For satisfactory operation, propane gas pressure must be 10 inch WC at the furnace manifold with all gas appliances WARNING in operation.
Page 30: Electrical Connections
INSTALLATION CONSIDERATIONS When installing a propane storage tank, the contractor must WARNING consider proper tank sizing, safety, efficiency, ground char- acteristics and aesthetics. For a residential customer, the F THE INFORMATION IN THESE INSTRUCTIONS IS NOT FOLLOWED EXACTLY, A size may range from 100-1,000 gallons, depending on house- FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL hold use.
Page 31 INSTALLATION CONSIDERATIONS Use a separate fused branch electrical circuit containing prop- Accessory Load Specifications erly sized wire, and fuse or circuit breaker. The fuse or cir- Humidifier 1.0 Amp maximum at 120 VAC cuit breaker must be sized in accordance with the maxi- mum overcurrent protection specified on the unit rating plate.
Page 32: Volt Humidifier
INSTALLATION CONSIDERATIONS NEUTRAL 24 V UMIDIFIER A 24 volt hum circuit may be powered off of the n/c side of the low fire pressure. If added in the field, the wiring must conform to all local and national codes. Connect the COM side of the humidifier to the C terminal on the furnace control board (or to the COM side of the 24 VAC transformer).
Page 33 INSTALLATION CONSIDERATIONS Thermostat Wiring - Two-Stage Variable Speed In a Non-Dual Fuel ComfortNet™ Furnaces Thermostat Application, Place Jumper Two-Stage Heating Between Y1 and O For with As a two-stage non-communicating furnace, the furnace Proper Dehumidification Single-Stage Cooling Operation and Proper integrated control module provides terminals for both “W1”...
Page 34 INSTALLATION CONSIDERATIONS CFM CHART High High Low Stage Model Stage Stage Stage Heat Cool Cool Heat DM96VC0403BN* 1192 1059 DM96VC0603BN* 1007 1158 1212 1260 1202 1316 DM96VC0803BN* 1023 1033 1389 1230 1063 1396 1228 1337 DM96VC0804CN* 1182 1016 1430 1375 1077 1516 1256...
Page 35 INSTALLATION CONSIDERATIONS DIP SWITCHES - FURNACES EQUIPPED WITH PCBKF103 / PCBKF104 / PCBKF105 Dip Switch Switch Bank Purpose Function Heating Off Delay 2 Stage Stat Thermostat 2 Stage Stat Setup 1 Stg Stat 5 min delay 1 Stg Stat auto delay Cooling Airflow Add 5% Minus 5%...
Page 36: Continuous Fan Operation
INSTALLATION CONSIDERATIONS For a furnace equipped with a PCBKF103, PCBKF104, or Single-Stage Thermostat Application PCBKF105 control board, select preferences on S5 #1 DIP A single-stage thermostat with only one heating stage may switch. be used to control this furnace. The application of a single- stage thermostat does not offer “true”...
Page 37 INSTALLATION CONSIDERATIONS 2. Determine the proper air flow for the cooling system. Most cooling systems are designed to work with air flows 100% CFM between 350 and 450 CFM per ton. Most manufactur- ers recommend an air flow of about 400 CFM per ton. Example: 2.5 tons X 400 CFM per ton = 1000 CFM The cooling system manufacturer’s instructions must be •...
Page 38 INSTALLATION CONSIDERATIONS heat or cool position. When the furnace is heating, the temperature of the return Model Minimum Recommended Filter Size^ air entering the furnace must be between 55°F and 100°F. Consider installing an air cleaner with deep-pleated media DM96VC0403BN* 1 - 16 X 25 Side or Bottom filter at the time of furnace installation.
Page 39 INSTALLATION CONSIDERATIONS Horizontal Installations Electronic Air Cleaner (ASAS and GSAS) or Media Filter(s) must be installed external to the furnace casing for Air Cleaner (AMU and GMU) The electronic air cleaner and media air cleaner are multi- horizontal installations. For most installations it is prefer- positional high efficiency air filtration devices that can be able to use a central return with filters installed in the duct installed in any position, except with the access door facing...
Page 40: System Operation
SYSTEM OPERATION NORMAL SEQUENCE OF OPERATION stage settings. The circulator blower will remain on high heating speed for thirty (30) seconds before OWER switching to the low heat circulating speed. The normal power up sequence is as follows: • R and W1 (or R and W1/W2) thermostat contacts •...
Page 41: Fan Only Mode
SYSTEM OPERATION play. Next, refer to the Troubleshooting Chart - ComfortNet™ on the following pages for an interpretation of the code dis- The normal operational sequence in fan only mode is as played on the LED's for a description of the problem. follows: •...
Page 42 SYSTEM OPERATION the gas valve will be de-energized and another purge will 8. Low Flame Sense Signal. If the furnace continues to occur and a third ignitor warm up for an additional (2) operate and the micro-amp signal from the flame sensor seconds will occur.
Page 43 SYSTEM OPERATION Temperature Limit. In attempting to deliver the airflow NOTE: Turn off power to the furnace prior to inserting memory demand, the motor may exceed its temperature limit. card onto the control. With memory card inserted onto con- The motor will reduce its output in an attempt to reduce trol, turn power to furnace on.
Page 44 SYSTEM OPERATION 22. Motor Parameters. This condition occurs if the motor 23. Low Indoor Airflow. This condition occurs if the in- does not receive all the information is requires to oper- door airflow falls below a calculated minimum value. The ate or an event occurs that prevents the motor from run- minimum airflow value is calculated from factors defined ning, or the motor fails to start for (40) consecutive at-...
Page 45: Troubleshooting
TROUBLESHOOTING ComfortNet™ Symptoms of Abnormal Diagnostic/ Thermostat Only Operation (Legacy & Status LED Fault Description Possible Causes Corrective Actions Notes & Cautions ComfortNet™ Thermostat) Codes Message Code • Furnace fails to operate None • No 115 power to INTERNAL • Manual disconnect switch •...
Page 46 TROUBLESHOOTING Symptoms of Abnormal ComfortNet™ Diagnostic/ Operation (Legacy Thermostat Only Status LED Fault Description Possible Causes Corrective Actions Notes & Cautions & ComfortNet™ Codes Thermostat) Message Code • Induced draft blower • Low stage PS1 OPEN • Pressure switch hose •...
Page 47 TROUBLESHOOTING ComfortNet™ Symptoms of Abnormal Diagnostic/ Operation (Legacy Thermostat Only Status LED Fault Description Possible Causes Corrective Actions Notes & Cautions & ComfortNet™ Codes Message Code Thermostat) • Furnace fails to operate. • Problem with IGNITER • Improperly connected • Check and correct •...
Page 48 TROUBLESHOOTING ComfortNet™ Symptoms of Abnormal Diagnostic/ Thermostat Only Operation (Legacy Status LED Fault Description Possible Causes Corrective Actions Notes & Cautions & ComfortNet™ Codes Message Code Thermostat) • Operation different than • Invalid memory INVALID MC • Shared data set on •...
Page 49 TROUBLESHOOTING ComfortNet™ Symptoms of Abnormal Diagnostic/ Thermostat Only Operation (Legacy Status LED Fault Description Possible Causes Corrective Actions Notes & Cautions & ComfortNet™ Codes Message Code Thermostat) • Circulator blower MOTOR • Turn power OFF prior • Furnace fails to operate. motor senses TRIPS to repair...
Page 50 TROUBLESHOOTING INTERNAL CONTROL FAULT/NO POWER NORMAL OPERATION LOCKOUT DUE TO EXCESSIVE RETRIES LOW STAGE PRESSURE SWITCH STUCK CLOSED AT START OF HEATING CYCLE LOW STAGE PRESSURE SWITCH STUCK OPEN OPEN HIGH LIMIT SWITCH FLAME DETECTED WHEN NO FLAME SHOULD BE PRESENT OPEN FUSE LOW FLAME SIGNAL IGNITER FAULT OR IMPROPER GROUNDING...
Page 51: System Operation Comfortnet
SYSTEM OPERATION ComfortNet™ System 4. Dehumidification (lowering of CFM to 85%) only happens ComfortNet™ System during low stage cooling operation. The dehumidification VERVIEW feature is not active during high stage cool. The CTK03AB The ComfortNet system is a system that includes a and CTK04 can be set up to overcool the home in order ComfortNet compatible furnace and air conditioner or heat to reach the RH set point.
Page 52 ComfortNet™ System SYSTEM OPERATION When using a CTK03A*or CTK04 thermostat, the included transformer must be used. If your communicating thermostat kit does not include a transformer, an accessory kit is available separately by CTK0*** Thermostat ordering part TFK01. ComfortNet Compatible 2 R C W1 W2 Y1 Furnace Integrated...
Page 53 SYSTEM OPERATION ComfortNet™ System URNACE DVANCED EATURES ENUS DIAGNOSTICS Submenu Item Indication/User Modifiable Options Comments Fault 1 (FAULT #1) Most recent furnace fault For display only Fault 2 (FAULT #2) Next most recent furnace fault For display only Fault 3 (FAULT #3) Next most recent furnace fault For display only Fault 4 (FAULT #4)
Page 54: Thermostat Menu
SYSTEM OPERATION ComfortNet™ System NON-COMM (APPLIES ONLY TO A COMMUNICATING COMPATIBLE FURNACE MATCHED WITH A NON-COMMUNICATING COMPATIBLE SINGLE STAGE AIR CONDITIONER) Submenu Item User Modifiable Options Comments Cool Airflow (CL CFM) 18, 24, 30, 36, 42, 48, or 60, default Selects the airflow for the non-CT is 18 compatible single stage AC unit...
Page 55 SYSTEM OPERATION ComfortNet™ System YSTEM ROUBLESHOOTING NOTE: Refer to the instructions accompanying the ComfortNet compatible outdoor AC/HP unit for troubleshooting information. Refer to the Troubleshooting Chart for a listing of possible furnace error codes, possible causes and corrective actions. Indication Possible Causes Corrective Action(s) Notes &...
Page 56: High Voltage
SYSTEM OPERATION ComfortNet™ System TROUBLESHOOTING Wiring issues may be confirmed (or eliminated) by using the CTK0*** thermostat and sub base, a 4-position connec- (ESD) P LECTROSTATIC ISCHARGE RECAUTIONS tor (included with the kit), and a short section (~ 2ft) of ther- mostat wire.
Page 57: Servicing
SERVICING Some of the electronic boards being used today, with flame rectification, will not function properly and/or at all without polarization of incoming power. Some also require phasing INCOMING POWER METER READS METER READS between the primary and secondary sides of step-down 120 VOLTS 0 VOLTS transformers.
Page 58: Gas Rate -- Cubic Feet Per Hour
SERVICING CUBIC FEET GAS RATE -- CUBIC FEET PER HOUR Size of Test Dial Size of Test Dial Seconds for Seconds for Revolution Revolution cu/ft cu/ft cu/ft cu/ft cu/ft cu/ft cu/ft cu/ft cu/ft cu/ft 1800 1636 1500 1385 1286 1200 1125 1059 1000...
Page 59 SERVICING Service Problem No Heat Unsatisfactory Heat POSSIBLE CAUSE Test Method DOTS IN ANALYSIS Remedy GUIDE INDICATE "POSSIBLE CAUSE" • Power Failure Test Voltage • Blown Fuse Test Voltage • Loose Connection Check Wiring • Shorted or Broken Wires Check Wiring S-3A •...
Page 60: Service Numbers
SERVICING SERVICE NUMBERS S-305 CHECKING MAIN BURNERS ..... 69 CHECKING VOLTAGE ....... 61 S-306 CHECKING ORIFICES....... 69 CHECKING WIRING ......61 S-307 CHECKING GAS PRESSURE ... 69 CHECKING THERMOSTAT, WIRING S-308 CHECKING AND ANTICIPATOR ......61 HOT SURFACE IGNITOR ....71 S-3A THERMOSTAT AND WIRING .....
Page 61: Checking Voltage
SERVICING S-1 CHECKING VOLTAGE CHECKING THERMOSTAT, WIRING AND ANTICIPATOR WARNING S-3A THERMOSTAT AND WIRING HIGH VOLTAGE WARNING ISCONNECT POWER BEFORE SERVICING OR CHANGING ANY ELECTRICAL WIRING. ULTIPLE POWER SOURCES MAY BE PRESENT. AILURE TO DO SO MAY CAUSE ISCONNECT POWER BEFORE SERVICING. PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
Page 62 SERVICING CHECKING TRANSFORMER AND Control CIRCUIT ECM Control Connections A step-down transformer 120 volt primary to 24 volt second- ECM control connections are made through the integrated ary, 40 VA (Heating and Cooling Models) supplies ample ignition control. No other control connections are needed. capacity of power for either operation.
Page 63 SERVICING 6. Ensure motor and wheel turn freely. Check for interfer- Replace or repair as needed. ence between wheel and housing or wheel and motor. Repair or replace as needed. Power Green Motor Indication(s) Button Action 7. Check housing for cracks and/or corrosion. Repair or Confirm 24VAC to replace as needed.
Page 64: Power Connector
SERVICING Motor Control/End Bell Checks AC Line Hot Connection AC Line Neutral Connection HIGH VOLTAGE! Disconnect ALL power before servicing or installing. Multiple power sources Lines 1 and 2 will be connected for 120VAC Power Connector may be present. Failure to do so may applications only cause property damage, personal injury or death.
Page 65: Checking Duct Static
SERVICING Too great of an external static pressure will result in insuffi- cient air that can cause excessive temperature rise, result- ing in limit tripping, etc. Whereas not enough static may result in motor overloading. To determine proper air movement, proceed as follows: 1.
Page 66: Checking Primary Limit Control
SERVICING PRIMARY LIMIT may result in condensing in or overheating of the heat ex- CONTROL changer. An airflow and temperature rise table is provided in the blower performance specification section. Determine and adjust temperature rise as follows: 1. Operate furnace with burners firing for approximately ten minutes.
Page 67: Checking Auxiliary Limit Control
SERVICING WARNING HIGH VOLTAGE ISCONNECT POWER BEFORE SERVICING OR INSTALLING THIS UNIT. ULTIPLE POWER SOURCES MAY VOLT / OHM METER BE PRESENT. AILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. 1. Remove the wires from the auxiliary limit control termi- nals.
Page 68: Induced Draft Blower Motor
SERVICING FLAME 1. Remove burner compartment door to gain access to the ROLLOUT induced draft blower motor. SWITCHES 2. Disconnect the motor wire leads from its connection point at the induced draft motor. 3. Using a ohmmeter, test for continuity between each of the motor leads.
Page 69: Checking Main Burners
SERVICING S-305 CHECKING MAIN BURNERS Orifices should be treated with care in order to prevent dam- age. They should be removed and installed with a box-end The main burners are used to provide complete combustion wrench in order to prevent distortion. In no instance should of various fuels in a limited space, and transfer this heat of an orifice be peened over and redrilled.
Page 70 SERVICING WARNING WARNING HIGH VOLTAGE ISCONNECT ELECTRICAL POWER AND SHUT OFF GAS SUPPLY. ISCONNECT ELECTRICAL POWER AND SHUT OFF GAS SUPPLY BEFORE SERVICING OR INSTALLING THIS UNIT. 1. After turning off gas to furnace at the manual gas shutoff ULTIPLE POWER SOURCES MAY BE PRESENT. AILURE TO valve external to the furnace, remove burner compart- DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
Page 71: Checking Hot Surface Ignitor
SERVICING WARNING WARNING HIGH VOLTAGE INE VOLTAGE NOW PRESENT ISCONNECT ELECTRICAL POWER AND SHUT OFF GAS SUPPLY BEFORE SERVICING OR INSTALLING. 3. Turn ON the gas and electrical power supply and oper- ate the furnace. 4. White-Rodgers 36J54 Valves: Manifold Gas Pressure a.
Page 72: Checking For Flashback
SERVICING interconnect with an inclined manometer as shown in the following figure. WARNING 4. With an ohm meter connected across the pressure INE VOLTAGE NOW PRESENT switch terminals and with the inducer running, the switch should close and the ohm meter should show a com- 6.
Page 73: Checking For Delayed Ignition
SERVICING S-312 CHECKING FOR DELAYED IGNITION When the control is powered up normally the light will be on continuously. The display wil indicate "ON" when powered Delayed ignition is a delay in lighting a combustible mixture and in standby mode. This can be used to test for 120 volts of gas and air which has accumulated in the combustion and 24 volts to the control since both must be present for chamber.
Page 74: Memory Chips
DAIKIN PT# PCBKF104 / PCBKF105 4. If voltage is present in Steps 1 through 3 and the in- duced draft blower is operating, check for 120 volts to the ignitor during the preheat cycle.
Page 75: Checking Flame Sensor
SERVICING WARNING HIGH VOLTAGE ISCONNECT POWER BEFORE SERVICING OR INSTALLING THIS UNIT. ULTIPLE POWER SOURCES MAY BE PRESENT. AILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. 1. Disconnect the flame sensor wire from the sensor. 2. Connect a micro-amp meter in series with this wire and the sensor terminal.
Page 76: Maintenance
MAINTENANCE WARNING HIGH VOLTAGE ISCONNECT POWER BEFORE SERVICING OR INSTALLING THIS UNIT. ULTIPLE POWER SOURCES MAY BE PRESENT. AILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. CAUTION Maintenance Improper filter maintenance is the most common cause of F YOU MUST HANDLE THE ITNITOR, HANDLE WITH CARE.
Page 77: Flame Sensor (Qualified Servicer Only)
MAINTENANCE To conduct a heating performance test, the BTU input to the CONDENSATE DRAINAGE SYSTEM (QUALIFIED furnace must be calculated. SERVICER ONLY) The drain tubes, trap, and field supplied drain line must be After the heating cycle has been in operation for at least checked annually and cleaned as often as necessary to fifteen minutes and with all other gas appliances turned off, ensure proper condensate drainage.
Page 78: Accessory Wiring Diagrams
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. ALL FUEL SYSTEM CONTROL BOARD - AFE1860A 24VAC POWER SUPPLY P1-8 +VD C...
Page 79: Integrated Ignition Control
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. INTEGRATED IGNITION CONTROL WHITE BLACK GREEN DE-HUMIDISTAT DE-HUMIDISTAT - DEHUM1 This wiring diagram is for reference only.
Page 80: Schematics
SCHEMATICS 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. 59-4715 REV. F ANSI Z21.20 AUTOMATIC IGNITION SYSTEM 24VAC 60Hz 0.8 A. MAX. Wiring is subject to change.
Page 81 SCHEMATICS 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. Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
Page 82: Wiring Diagrams
WIRING DIAGRAMS DM96VC/DC96VC 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. Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
Page 83 WIRING DIAGRAMS DM96VC/DC96VC 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. Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.

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