Daikin DM96VE Service Manual
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Daikin DM96VE Service Manual

Two stage furnace with multi-speed ecm motor
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O
NLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL
(
, "
")
REPAIR
HEREINAFTER
SERVICE
. T
SHOULD SERVICE THE EQUIPMENT
FOR ANY INJURY OR PROPERTY DAMAGE ARISING FROM IMPROPER SERVICE OR
. I
SERVICE PROCEDURES
F YOU SERVICE THIS UNIT
FOR ANY INJURY OR PROPERTY DAMAGE WHICH MAY RESULT
JURISDICTIONS THAT REQUIRE ONE OR MORE LICENSES TO SERVICE THE EQUIPMENT
,
SPECIFIED IN THIS MANUAL
ONLY LICENSED PERSONNEL SHOULD SERVICE THE
. I
EQUIPMENT
MPROPER INSTALLATION
THE EQUIPMENT SPECIFIED IN THIS MANUAL
SERVICE OR REPAIR THE EQUIPMENT SPECIFIED IN THIS MANUAL WITHOUT PROPER
TRAINING MAY RESULT IN PRODUCT DAMAGE
.
INJURY OR DEATH
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 manufacturers installa-
tion and operation instructions.
Service Instructions
DM96VE/DC96VE
Two Stage Furnace
with Multi-Speed ECM Motor
,
,
ADJUST
SERVICE OR
THE EQUIPMENT SPECIFIED IN THIS MANUAL
HE MANUFACTURER WILL NOT BE RESPONSIBLE
,
YOU ASSUME RESPONSIBILITY
. I
N ADDITION
,
,
ADJUSTMENT
SERVICING OR REPAIR OF
,
OR ATTEMPTING TO INSTALL
,
,
PROPERTY DAMAGE
PERSONAL
Copyright © 2015 - 2018
FOR CALIFORNIA CONSUMERS
,
IN
,
,
ADJUST
PROP 65 WARNING
Cancer and Reproductive Harm
www.P65Warnings.ca.gov
-
0140M00513-A
RSD6612013r9
September 2018

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  • Page 1 PERSONAL INJURY OR DEATH 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 manufacturers installa- tion and operation instructions.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS IMPORTANT INFORMATION .......... 2 COMBUSTION QUALITY ..........50 PRODUCT IDENTIFICATION .......... 6 SERVICING TABLE OF CONTENTS ......51 OPERATING INSTRUCTIONS ........10 SERVICING ..............52 INSTALLATION CONSIDERATIONS ......11 TROUBLESHOOTING ..........55 MAINTENANCE ............70 SYSTEM OPERATION ..........29 WIRING DIAGRAMS ..........
  • Page 3 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 4 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. Coupez l'alimentation electrique de l'appareil. entrainer un risque d'incendie ou d'explosion causant des dommages, 4.
  • Page 5 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 BRAND PRODUCTS TOLL FREE 1-855-770-5678 (U.S. only) email us at: customerservice@daikincomfort.com...

  • Page 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. Brand Minor Revision D - Daikin® A - Initial Release B - 1st Revision Configuration...
  • Page 7 DM96VE1005CNAC DM96VE1205DNAC DM96VE0603BNBA DC96VE0403BNAA Daikin® Brand 96% Two Stage Heating / Two Stage Cooling Gas Furnace, Counter flow DC96VE0603BNAA DC96VE / Horizontal Left and Right, 34.5" tall , Induced Draft, Nidec m ulti -s peed ECM m otor. DC96VE0803BNAA Stainles s Steel tubular heat exchanger.
  • Page 8 May also be used in the combustion air intake if condensation is an issue. Counterflow Subbase Kit . For use with Daikin® Brand 96% two stage 34.5 furnace model. These kits are available for the following furnace width: 17.5" wide (CFSB17), 21"...
  • Page 9 PRODUCT IDENTIFICATION DM96VE DM96VE DM96VE DM96VE DM96VE DM96VE0 DM96VE DM96VE DM96VE DM96VE DM96VE 0303ANA 0403ANA 0603ANA 0302BNA 0402BNA 603BNB 0803BNA 0804CNA 1004CNA 1005CNA 1205DNA Heating Data High Fi re Input¹ 30,000 40,000 60,000 30,000 40,000 60,000 80,000 80,000 100,000 100,000 120,000 High Fi re Output¹...

  • Page 10: Operating Instructions

    1. Disconnect all power to the furnace. Do not touch the The DM96VE and DC96VE 34.5" furnaces are some of the integrated control module or any wire connected to the products in our newly redesigned line of shorter chassis fur- control prior to discharging your body’s electrostatic...

  • Page 11: Installation Considerations

    INSTALLATION CONSIDERATIONS LOCATION REQUIREMENTS AND CONSIDERATIONS WARNING WARNING OSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH DUE TO FIRE, O PREVENT POSSIBLE EQUIPMENT DAMAGE, PROPERTY DAMAGE, PERSONAL EXPLOSION, SMOKE, SOOT, CONDENSTAION, ELECTRICAL SHOCK OR CARBON INJURY OR DEATH, THE FOLLOWING BULLET POINTS MUST BE OBSERVED MONOXIDE MAY RESULT FROM IMPROPER INSTALLATION, REPAIR, OPERATION, OR MAINTENANCE OF THIS PRODUCT.
  • Page 12 • If the furnace is installed horizontally, the furnace ac- quirement. cess doors must be vertical so that the burners fire DM96VE Minimum Clearances To Combustible Materials horizontally into the heat exchanger. Do not install Position Sides Rear...
  • Page 13 INSTALLATION CONSIDERATIONS • NC = For installation on non-combustible floors only. c. In so far as practical, close all building doors and win- dows and all doors between the space in which the A combustible subbase mus be used for installations on combustible flooring.
  • Page 14 INSTALLATION CONSIDERATIONS COMBUSTION AND VENTILATION AIR REQUIREMENTS 9.3.1.5 Makeup air requirements for the operation of exhaust fans, kitchen ventilation systems, clothes dryers, and fireplaces shall be considered in determining the adequacy of a space to provide combustion air require- WARNING ments.
  • Page 15 INSTALLATION CONSIDERATIONS Chimney or Gas Vent Chimney or Gas Vent NOTE: Each opening must have Ventilation louvers a free area of not less than one (each end of attic) square inch per 1000 BTU of NOTE: The inlet and outlet air the total input rating of all equip- openings must each have a free ment in the enclosure, but not...
  • Page 16 INSTALLATION POSITIONS: DM96VE Models may only be installe up-flow or horizon- 9.3.6.3 Where combustion air is provided by the building’s mechanical tally with left or right side down. DC96VE models may be ventilation system, the system shall provide the specified combustion installed down-flow or horizontally with left or right side down.
  • Page 17 A minimum clearance of 5.5" below the furnace must When installing a DM96VE horizontally with the left side be provided for the drain trap. Additionally, the appropriate down, there are two options for connecting the vent pipe to downward piping slope must be maintained from the drain the furnace.
  • Page 18 INSTALLATION CONSIDERATIONS ROPANE AS AND LTITUDE NSTALLATIONS DISCHARGE WARNING OSSIBLE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH MAY OCCUR IF THE CORRECT CONVERSION KITS ARE NOT INSTALLED. HE APPROPRIATE KITS MUST BE APPLIED TO INSURE SAFE AND PROPER FURNACE OPERATION. CONVERSIONS MUST BE PERFORMED BY A QUALIFIED INSTALLER OR SERVICE Side Side Return...
  • Page 19 INSTALLATION CONSIDERATIONS ensure that all piping and connections possess adequate NOTE: In Canada, the B149 Fuel Gas Code takes prece- structural integrity and support to prevent flue pipe separa- dence over the preceding termination restrictions. tion, shifting, or sagging during furnace operation. OTHER THAN COMBUSTION AIR ATERIALS AND...
  • Page 20 INSTALLATION CONSIDERATIONS DM96VE & DC96VE Direct Vent (2 - Pipe) and Non-Direct Vent (1- Pipe) Maximum Allowable Length of Vent/Flue Pipe (3) (5) Pipe Size Number of Elbows MODEL (in.) DM 96VE0303AN & DM 96VE0403AN DM 96VE0603AN^ DM 96VE0302BN &...
  • Page 21 INSTALLATION CONSIDERATIONS 12" MIN. 90° ELBOWS VENT/FLUE TEE ( OPTIONAL) 45° ELBOW TURNED DOWN or 3” - 24” 90° ELBOW TURNED DOWN 12" MIN. ABOVE INTAKE HIGHEST ANTICIPATED SNOW LEVEL Horizontal Termination (Single Pipe) Above Highest Alternate Horizontal Vent Termination (Dual Pipe) Anticipated Snow Level 10”- 24”...
  • Page 22 INSTALLATION CONSIDERATIONS 2 or 2 1/2" Diameter 3" or 4" Diameter SDR-26 Pipe SDR-26 Pipe 2" or 3" Diameter Rain Cap 2" or 3" Diameter Y Concentric Fitting These kits are for vertical or horizontal termination of the 3” - 24” combustion air inlet and the exhaust vent pipes on Category 12”...
  • Page 23 INSTALLATION CONSIDERATIONS Do not derate the furnace by adjusting the manifold pres- WARNING sure to a lower pressure than specified on the furnace rating plate. The combination of the lower air density and a lower N UPRIGHT UPFLOW INSTALLATIONS, THE DRAIN TRAP MUST BE MOUNTED ON manifold pressure will prohibit the burner orifice from draw- THE OPPOSITE SIDE OF THE UNIT FROM THE JUNCTION BOX.
  • Page 24 INSTALLATION CONSIDERATIONS GAS PIPING CONNECTIONS 7. Install a manual shutoff valve between the gas meter and unit within six feet of the unit. If a union is installed, the union must be downstream of the manual shutoff valve, CAUTION between the shutoff valve and the furnace. 8.
  • Page 25 INSTALLATION CONSIDERATIONS 3. Pressure drop in lines between regulators, and between WARNING second stage regulator and the appliance. Pipe size will depend on length of pipe run and total load of all appli- F THE INFORMATION IN THESE INSTRUCTIONS IS NOT FOLLOWED EXACTLY, A ances.
  • Page 26 INSTALLATION CONSIDERATIONS When installing a propane storage tank, the contractor must NOTE: Line polarity must be observed when making field consider proper tank sizing, safety, efficiency, ground char- connections. acteristics and aesthetics. For a residential customer, the size may range from 100-1,000 gallons, depending on house- hold use.
  • Page 27 HERMOSTAT IRING high stage. The DM96VE furnace has W1 & W2 terminals for connec- tion of a two stage heating thermostat. If desired, a thermo- Thermostat Staging Setup PCBBF137 stat with only one stage of heat may be used.
  • Page 28 WINNING Using the “TWIN” terminals and proper wiring enables two WARNING DM96VE furnaces of the same model and size to be twinned. O AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRICAL SHOCK Twinning allows simultaneous operation of two furnaces and...

  • Page 29: System Operation

    SYSTEM OPERATION Upflow furnaces with air delivery of less than 1800 CFM: if manually operated, must be equipped with means to pre- vent operation of either unit unless the damper is in the full Use one side return or one bottom return ductwork connec- heat or cool position.
  • Page 30 INSTALLATION CONSIDERATIONS DIP SWITCH SETTINGS PCBBF137 CONTROL BOARD DIP SWITCHES Thermostat Selection Switches Heating Fan Off Delay Functi on Swi tch Swi tch Purpos e Group Number Auto 1 OFF* 2 ON* Hea t 10 Mi nutes 1 ON 2 OFF 1, 2 Sta gi ng / 20 Mi nutes...
  • Page 31 SYSTEM OPERATION DIP SWITCH SETTINGS PCBBF137 PCBBF139 DM96VE0303AN - COOLING Static DIP Sw itches DIP Sw itches S2-1 S2-2 S2-3 S1-1 S1-2 S1-3 Tstat Call 91 4 **OFF OFF OFF **OFF OFF OFF 1 070 1 040 1 005 91 5 41 0 ON OFF OFF ON OFF OFF...
  • Page 32 SYSTEM OPERATION DIP SWITCH SETTINGS PCBBF137 PCBBF139 DM96VE0403AN - COOLING Static DIP Sw itches DIP Sw itches S2-1 S2-2 S3-3 S1-1 S1-2 S1-3 Tstat Call 91 4 **OFF OFF OFF **OFF OFF OFF 1 070 1 040 1 005 91 5 41 0 ON OFF OFF ON OFF OFF...
  • Page 33 SYSTEM OPERATION DIP SWITCH SETTINGS PCBBF137 PCBBF139 DM96VE0603AN - COOLING Static DIP Sw itches DIP Sw itches S2-1 S2-2 S3-3 S1-1 S1-2 S1-3 Tstat Call **OFF OFF OFF **OFF OFF OFF 1 056 1 026 41 9 ON OFF OFF ON OFF OFF 41 9 ON ON OFF / OFF ON ON...
  • Page 34 SYSTEM OPERATION DIP SWITCH SETTINGS DM96VE0603BNBA - COOLING Static DIP Switches S1-1 S1-2 S1-3 Tstat Call 1328 1287 1249 1215 1170 1131 1085 1046 **OFF OFF OFF 1236 1189 1149 1101 1066 1017 ON OFF OFF 1328 1287 1249 1215 1170 1131 1085...
  • Page 35 SYSTEM OPERATION DIP SWITCH SETTINGS DC96VE0403BN - COOLING Static DIP Switches S1-1 S1-2 S1-3 Tstat Call **OFF OFF OFF 1229 1181 1150 1117 1078 1035 1002 1137 1096 1056 1018 ON OFF OFF 1137 1096 1056 1018 ON ON OFF 1229 1181 1150...
  • Page 36 SYSTEM OPERATION DIP SWITCH SETTINGS PCBBF137 PCBBF139 DC96VE0603BN - COOLING Static DIP Switches DIP Switches S2-1 S2-2 S2-3 S1-1 S1-2 S1-3 Tstat Call 1149 1104 1057 1017 **OFF OFF OFF **OFF OFF OFF 1236 1189 1149 1101 1066 1017 ON OFF OFF ON OFF OFF 1149 1104...
  • Page 37 SYSTEM OPERATION DIP SWITCH SETTINGS PCBBF137 PCBBF139 D*96VE0803BN - COOLING Static DIP Switches DIP Switches S2-1 S2-2 S2-3 S1-1 S1-2 S1-3 Tstat Call **OFF OFF OFF **OFF OFF OFF 1111 1068 1025 ON OFF OFF ON OFF OFF ON ON OFF / OFF ON ON ON ON OFF 1111 1068...
  • Page 38 SYSTEM OPERATION DIP SWITCH SETTINGS PCBBF137 PCBBF139 DM96VE0804CN - COOLING Static DIP Switches DIP Switches S2-1 S2-2 S2-3 S1-1 S1-2 S1-3 Tstat Call 1185 1121 1058 **OFF OFF OFF **OFF OFF OFF 1727 1691 1642 1600 1545 1504 1449 1410 1408 1337 1279...
  • Page 39 SYSTEM OPERATION DIP SWITCH SETTINGS PCBBF137 PCBBF139 DM96VE1004CN - COOLING DIP Switches DIP Switches S2-1 S2-2 S2-3 S1-1 S1-2 S1-3 1312 1235 1170 1101 1037 **OFF OFF OFF **OFF OFF OFF 1772 1713 1662 1609 1540 1498 1452 1399 1004 ON OFF OFF^ ON OFF OFF^ 1312...
  • Page 40 SYSTEM OPERATION DIP SWITCH SETTINGS PCBBF139 DC96VE1005CN - COOLING Static DIP Switches S1-1 S1-2 S1-3 Tstat Call 1637 1577 1528 1467 1410 1369 1307 1256 **OFF OFF OFF 2069 2009 1978 1932 1923 1876 1834 1773 1477 1422 1364 1301 1244 1190 1135...
  • Page 41 SYSTEM OPERATION DIP SWITCH SETTINGS PCBBF137 PCBBF139 DM96VE1205DN - COOLING DIP Switches DIP Switches S2-1 S2-2 S2-3 S1-1 S1-2 S1-3 1399 1327 1259 1185 1118 1051 **OFF OFF OFF **OFF OFF OFF 1683 1628 1565 1511 1445 1387 1340 1276 1106 1017 ON OFF OFF^...
  • Page 42 SYSTEM OPERATION DIP SWITCH SETTINGS PCBBF137 PCBBF139 DM96VE1005CN - COOLING Static DIP Switches DIP Switches S2-1 S2-2 S2-3 S1-1 S1-2 S1-3 Tstat Call 1384 1324 1271 1204 1145 1088 1029 **OFF OFF OFF **OFF OFF OFF 2008 1963 1944 1916 1876 1839 1801...
  • Page 43 SYSTEM OPERATION ADDITIONAL FILTERING ACCESSORIES • The low pressure switch is checked for closure. (EFR02) XTERNAL ILTER • Once the low pressure switch is closed, the pre-purge The external filter rack kit is intended to provide a location period begins. The inducer will be energized at high external to the furnace casing, for installation of a perma- speed for the pre-purge period.
  • Page 44 SYSTEM OPERATION PERATION SING A INGLE TAGE EATING HERMOSTAT Using a single stage thermostat, the options for high fire Duty Cycle % Valve Output Demand delay are: 10 minutes; 20 minutes; or auto 0-38 Stage, 12 minute 2 Stage Light •...
  • Page 45 SYSTEM OPERATION • The compressor and condenser fan are energized. The compressor is connected to the Y terminal of the con- trol module. • The circulator fan is energized at cool speed after a cool on delay. The electronic air cleaner will also be energized.

  • Page 46: Accessories

    ACCESSORIES DM96VE/DC96VE FURNACE ACCESSORIES MO DEL NUMBER DES CRIP TIO N DM96VE0303ANAA • • • • • • • • • • • N/ A N/ A N/ A DM96VE0403ANAA • • • • • • • • • •...
  • Page 47 ACCESSORIES EXTERNAL FILTER RACK KIT (EFR02) SLOTS IN FILTER CLEAR SCREWS ON UNIT BLOWER DECK EFR02 EXTERNAL FILTER RACK KIT SCREWS Used on Models 90% Upflow Model Furnaces UNIT SIDE PANEL FRONT OF UNIT FILTER RACK ASSEMBLY (FACE FILTER OPENING BASE TOWARDS FRONT OF UNIT...
  • Page 48 ACCESSORIES CONCENTRIC VENT CONVERSION KIT ( DCVK-20 w DCVK-30 ) (CVENT-2 ) ( CVENT-3 ) Vent Maintain 12" (18" for Canada) minimum clearance above highest anticipated snow level. Maximum of The DCVK-20 (2") or the DCVK-30 (3") is a concen- 24"...
  • Page 49 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. 24VAC POWER SUPPLY P1-8 +VDC INPUT POWER +5VDC FURNACE DEMAND P1-7 W1-FURN...

  • Page 50: Combustion Quality

    COMBUSTION QUALITY COMBUSTION QUALITY Combustion quality can be affected by several factors. Ma- jor factors are venting and draining. VENTING The venting system should be planned and installed with the following in mind: • Should not be longer than necessary •...

  • Page 51: Servicing Table Of Contents

    SERVICING SERVICE NUMBERS CHECKING VOLTAGE ........................... 58 CHECKING WIRING ............................58 S-3A THERMOSTAT AND WIRING ......................... 59 S-3B HEATING ANTICIPATOR ..........................59 CHECKING TRANSFORMER AND CONTROL CIRCUIT ................59 S-16A CHECKING AIR CIRCULATOR BLOWER MOTOR (MULTI-SPEED ECM MOTOR) ........60 S-200 CHECKING DUCT STATIC ..........................

  • Page 52: Servicing

    SERVICING As more and more electronic's are introduced to the Heat- INCOMING POWER ing Trade, Polarization of incoming power and phasing of METER READS METER READS 120 VOLTS 0 VOLTS primary to secondary voltage on transformers becomes more important. Polarization has been apparent in the Appliance industry VOLT / OHM VOLT / OHM since the introduction of the three prong plug, however, the...
  • Page 53 SERVICING CUBIC FEET GAS RATE -- CUBIC FEET PER HOUR Size of Test Dial Size of Test Dial Seconds Seconds for One for One 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...
  • Page 54 SERVICING Unsatisfactory Service Problem No Heat Heat POSSIBLE CAUSE Test Method DOTS IN ANALYSIS Remedy GUIDE INDICATE "POSSIBLE CAUSE" • Pow er Failure Test Voltage • Blow n Fuse Test Voltage • Loose Connection Check Wiring • Shorted or Broken Wires Check Wiring S-3A •...

  • Page 55: Troubleshooting

    TROUBLESHOOTING Green Amber Symptoms Fault Description Check Cautions LED Code LED Code LED Code •Defective disconnect switch •Determine cause and restore •Confirm electrically safe •Furnace fails to operate •defective door switch • No •None •None •None proper high and low volt power condition before •Control board LED is off 115 volt power •No 24 volt...
  • Page 56 TROUBLESHOOTING Green Amber Symptoms Fault Description Check Cautions LED Code LED Code LED Code •Temperature rise, duct static, •Furnace does not •Four •Open limit circuit, main •Confirm electrically safe gas pressure, burner alignment, operate, four Red •None •None repeating limit, aux limit, or roll out condition before orifice plate position, wiring to flashes on control board...
  • Page 57 SERVICING DIAGNOSTIC CHART The ignition control is equipped with a momentary push but- ton switch that can be used to display on the diagnostic Refer to the Troubleshooting Chart in the back of this manual LED the last five faults detected by the control. The control for assistance in determining the source of unit operational prob- must be in Standby Mode (no thermostat inputs) to use the lems.

  • Page 58: Checking Voltage

    SERVICING VENTING S-1 CHECKING VOLTAGE The venting system should be planned and installed with the following in mind: WARNING • Should not be longer than necessary. HIGH VOLTAGE • Use 45° elbows rather than 90° elbows when pos- ISCONNECT POWER BEFORE SERVICING OR sible.

  • Page 59: S-3A Thermostat And Wiring

    SERVICING CHECKING THERMOSTAT, WIRING AND ANTICIPATOR S-4 CHECKING TRANSFORMER AND CONTROL CIRCUIT S-3A THERMOSTAT AND WIRING A step-down transformer 120 volt primary to 24 volt second- ary, 40 VA (Heating and Cooling Models) supplies ample WARNING capacity of power for either operation. ISCONNECT POWER BEFORE SERVICING.

  • Page 60: S-16A Checking Air Circulator Blower Motor (Multi-Speed Ecm Motor)

    SERVICING S-16A CHECKING AIR CIRCULATOR BLOWER 1. With clean filters in the furnace, use a draft gauge (in- clined manometer) to measure the static pressure of the MOTOR (MULTI-SPEED ECM MOTOR) return duct at the inlet of the furnace. (Negative Pres- sure) WARNING 2.
  • Page 61 SERVICING ENCLOSED DISK SUPPLY FRONT VIEW SIDE VIEW Primary Limit Control Style (90% Furnaces) WARNING HIGH VOLTAGE ISCONNECT POWER BEFORE SERVICING OR CHANGING ANY ELECTRICAL WIRING. ULTIPLE POWER RETURN SOURCES MAY BE PRESENT. AILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. 1.

  • Page 62: S-301 Checking Auxiliary Limit Control

    SERVICING WARNING HIGH VOLTAGE ISCONNECT POWER BEFORE SERVICING OR INSTALLING THIS UNIT. ULTIPLE POWER SOURCES MAY VOLT / OHM BE PRESENT. AILURE TO DO SO MAY CAUSE PROPERTY METER DAMAGE, PERSONAL INJURY OR DEATH. 1. Remove blower compartment door to gain access to the auxiliary.

  • Page 63: Checking Flame Rollout Control

    SERVICING S-303 INDUCED DRAFT BLOWER Motor S-302 CHECKING FLAME ROLLOUT CONTROL A temperature activated manual reset control is mounted to the manifold assembly as shown in the following illustration. WARNING FLAME ROLLOUT HIGH VOLTAGE SWITCHES ISCONNECT POWER BEFORE SERVICING OR INSTALLING THIS UNIT.

  • Page 64: Checking Orifices

    SERVICING The main burners are used to provide complete combustion of various fuels in a limited space, and transfer this heat of WARNING the burning process to the heat exchanger. Proper ignition, combustion, and extinction are primarily due ALL G ISCONNECT AS AND LECTRICAL...
  • Page 65 SERVICING GAS MANIFOLD PRESSURE MEASUREMENT AND ADJUSTMENT Open to Only small variations in gas pressure should be made by adjust- Atmosphere ing the gas valve pressure regulator. The manifold pressure must High Fire Regulator be measured with the burners operating. To measure and adjust Outlet Adjust Regulator...
  • Page 66 SERVICING 8. Remove regulator cover screw from the low (LO) outlet High Fire pressure regulator adjust tower and turn screw clock- Regulator Regulator wise to increase pressure or counterclockwise to de- Adjust Vent crease pressure. Replace regulator cover screw. 9. Close thermostat “R”, “W1” and “W2” contacts to pro- vide a call for high stage heat.

  • Page 67: Checking Hot Surface Ignitor

    S-308 CHECKING HOT SURFACE IGNITOR 4. With an ohm meter connected across the pressure 120V Silicon Nitride Igniter - DM96VE furnaces use a switch terminals; with the inducer running the switch 120V silicon nitride igniter for ignition. The normal...

  • Page 68: S-311 High Altitude Application (Usa)

    In some areas the gas supplier may artificially derate the is 4 seconds. gas in an effort to compensate for the effects of altitude. If Daikin Brand Two-Stage (DM96VE/DC96VE) the gas is artificially derated the appropriate orfice size must be determined based on the BTU/ft content of the derated 1.

  • Page 69: Checking Flame Sensor

    SERVICING 5. If proof of flame was established voltage will be provided to the air circulation blower following the heat on delay period. CAUTION - 120V NEUTRALS Flame Current Solder Pads R201 R202 R200 R586 FLAME R588 CURRENT R204 R566 R578 R568 R580...

  • Page 70: 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. AINTENANCE CAUTION Improper filter maintenance is the most common cause of inadequate heating or cooling performance.
  • Page 71 SERVICING DM96VE Pressure Switch Trip Points And Usage Chart Coil Cover ID Blower Set Point on Max Make Pressure Low Fire Low Fire High Fire High Fire Low / High Model Pressure Fall Pressure On Switch Set Point on Max Make...
  • Page 72 MAINTENANCE URNERS EATING ERFORMANCE Before attempting to diagnose an operating fault, run a heat- ing performance test and apply the results to the Service WARNING Problem Analysis Guide. To conduct a heating performance test, the BTU input to the HIGH VOLTAGE LECTRICAL COMPONENTS ARE CONTAINED IN BOTH furnace must be calculated.

  • Page 73: Wiring Diagrams

    WIRING DIAGRAMS FURNACES WITH PCBBF137 CONTROL BOARD WARNING:DISCONNECT POWER BEFORE SERVICING. WIRING TO UNIT MUST BE PROPERLY POLARIZED AND GROUNDED. TO 115VAC/ 1 /60 HZ POWER SUPPLY WITH OVERCURRENT PROTECTION DEVICE WARNING: DISCONNECT POWER BEFORE SERVICING. WIRING TO UNIT MUST BE PROPERLY POLARIZED AND GROUNDED.
  • Page 74 WIRING DIAGRAMS FURNACES WITH PCBBF139 CONTROL BOARD WARNING:DISCONNECT POWER BEFORE SERVICING. WIRING TO UNIT MUST BE PROPERLY POLARIZED AND GROUNDED. ECM MTR HARNESS CIRCULATOR BLOWER EQUIPMENT GND FIELD GND FIELD SPLICE SWITCH (TEMP.) IGNITER SWITCH (PRESS.) OVERCURRENT PROT. DEVICE JUNCTION TERMINAL INTERNAL TO INTEGRATED CONTROL...

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