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Installation Instructions
for DR96SN*U Ultra Low
NOx Gas Furnace
(Type FSP CATEGORY IV Direct
or Non Direct Vent Air Furnace)
(Type FSP CATÉGORIE IV Direct
ou four á air soufflé non direct)
These furnaces comply with requirements embodied
in the American National Standard/National Standard
of Canada ANSI Z21.47·CSA-2.3 Gas Fired Central
Furnaces.
s a professional installer you have an obligation to know
A
the product better than the customer. This includes all
safety precautions and related items.
Prior to actual installation, thoroughly familiarize yourself
with this Instruction Manual. Pay special attention to all
safety warnings. Often during installation or repair it is
possible to place yourself in a position which is more
hazardous than when the unit is in operation.
Remember, it is your responsibility to install the product
safely and to know it well enough to be able to instruct a
customer in its safe use.
Safety is a matter of common sense...a matter of thinking
before acting. Most dealers have a list of specific good
safety practices...follow them.
The precautions listed in this Installation Manual are
intended as supplemental to existing practices. However,
if there is a direct conflict between existing practices and
the content of this manual, the precautions listed here take
precedence.
RECOGNIZE THIS SYMBOL
AS A SAFETY PRECAUTION.
Our continuing commitment to quality products may mean a change in specifications without notice.
© 2024-2025
IOD-2040C
01/2025
Installer:
Affix all manuals
adjacent to the unit.
19001 Kermier Rd., Waller, TX 77484
www.daikincomfort.com
INSTALLATION INSTRUCTIONS
ONLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL,
ADJUST, SERVICE, MAINTENANCE OR REPAIR (HEREINAF-
TER, "SERVICE") THE EQUIPMENT SPECIFIED IN THIS MANUAL
SHOULD SERVICE THE EQUIPMENT.
THIS EQUIPMENT IS NOT INTENDED FOR USE BY PERSONS
(INCLUDING CHILDREN) WITH REDUCED PHYSICAL, SENSORY
OR MENTAL CAPABILITIES, OR LACK OF EXPERIENCE AND
KNOWLEDGE, UNLESS THEY HAVE BEEN GIVEN SUPERVISION
OR INSTRUCTION CONCERNING USE OF THE APPLIANCE BY A
PERSON RESPONSIBLE FOR THEIR SAFETY.
CHILDREN SHOULD BE SUPERVISED TO ENSURE THAT THEY
DO NOT PLAY WITH THE EQUIPMENT.
THE MANUFACTURER WILL NOT BE RESPONSIBLE FOR ANY
INJURY OR PROPERTY DAMAGE ARISING FROM IMPROPER
SUPERVISION, SERVICE OR SERVICE PROCEDURES. IF YOU
SERVICE THIS UNIT, YOU ASSUME RESPONSIBILITY FOR
ANY INJURY OR PROPERTY DAMAGE WHICH MAY RESULT. IN
ADDITION, IN JURISDICTIONS THAT REQUIRE ONE OR MORE
LICENSES TO SERVICE THE EQUIPMENT SPECIFIED IN THIS
MANUAL, ONLY LICENSED PERSONNEL SHOULD SERVICE
THE EQUIPMENT. IMPROPER SUPERVISION, INSTALLATION,
ADJUSTMENT, SERVICING, MAINTENANCE OR REPAIR OF THE
EQUIPMENT SPECIFIED IN THIS MANUAL, OR ATTEMPTING
TO INSTALL, ADJUST, SERVICE OR REPAIR THE EQUIPMENT
SPECIFIED IN THIS MANUAL WITHOUT PROPER SUPERVISION
OR TRAINING MAY RESULT IN PRODUCT DAMAGE, PROPERTY
DAMAGE, PERSONAL INJURY OR DEATH.
Do not bypass safety devices.
This furnace may be paired with a cooling unit that uses R-32
refrigerant. If the cooling unit paired with this furnace
does not use R-32, the R-32 function control board needs
to be turned off. Please see the electrical and the R-32 sec-
tions for more details. Refrigerant systems other than 410A
or R32 may require an additional mitigation control board.
Refer to the installation manual of the indoor evaporator
coil to determine installation requirements for that suppli-
er's refrigerant detection system.
WARNING
WARNING
WARNING
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Related Manuals for Daikin DR96SN U Series
Summary of Contents for Daikin DR96SN U Series
- Page 1 INSTALLATION INSTRUCTIONS Installation Instructions for DR96SN*U Ultra Low WARNING NOx Gas Furnace ONLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL, ADJUST, SERVICE, MAINTENANCE OR REPAIR (HEREINAF- (Type FSP CATEGORY IV Direct TER, “SERVICE”) THE EQUIPMENT SPECIFIED IN THIS MANUAL SHOULD SERVICE THE EQUIPMENT. or Non Direct Vent Air Furnace) THIS EQUIPMENT IS NOT INTENDED FOR USE BY PERSONS (Type FSP CATÉGORIE IV Direct...
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Page 2: Table Of Contents
Table of Contents Adhere to the following warnings and cautions when installing, adjusting, altering, servicing, or operating the furnace. To ensure proper installation and operation, Safety Considerations ..........2 thoroughly read this manual for specifics pertaining to the Product Application ............5 installation and application of this product. -
Page 3: Shipping Inspection
WARNING WARNING To prevent personal injury or death due to improper in- Heating unit should not be utilized without reasonable, stallation, adjustment, alteration, service or maintenance, routine inspection, maintenance and supervision. If the refer to this manual. For additional assistance or informa- building in which any such device is located will be vacant, tion, consult a qualified installer, servicer agency or the care should be taken that such device is routinely inspect-... - Page 4 RISQUE D'EMPOISONNEMENT AU MONOXYDE DE CARBONE Advertencia especial para la instalación de calentadores ó manejadoras de aire en áreas cerradas como estacionamientos ó cuartos de servicio. Cette ventilation est nécessaire pour éviter le danger d'intoxication Las emisiones de monóxido de carbono pueden circular a través au CO pouvant survenir si un appareil produisant du monoxyde del aparato cuando se opera en cualquier modo.
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Page 5: Product Application
PRODUCT APPLICATION National Fire Protection Association 1 Batterymarch Park Quincy, MA 02169-7471 This furnace is primarily designed for residential home- heating applications. It is NOT designed or certified for CSA International use in mobile homes, trailers or recreational vehicles. 8501 East Pleasant Valley Neither is it designed or certified for outdoor applications. -
Page 6: Clearances And Accessibility
• Ensure adequate combustion air is available for access doors are not on the “up/top” or “down/ the furnace. Improper or insufficient combustion air bottom” side of the furnace. can expose building occupants to gas combustion • Do not connect this furnace to a chimney flue that products that could include carbon monoxide. -
Page 7: Thermostat Location
exhaust fans, fireplace dampers and any other gas burning appliance to their previous conditions of use. If resizing is required on any portion of the venting system, use the appropriate table in the latest edition of the National Fuel Gas Code ANSI Z223.1 Installation Codes. BOTTOM Thermostat Location BOTTOM... -
Page 8: Installation Positions
combustion air requirements for the appliances. Most homes will require outside air be supplied to the furnace area by means of ventilation grilles or ducts connecting directly to the outdoors or spaces open to the outdoors such as attics or crawl spaces. INSTALLATION POSITIONS Figure 2C This furnace may be installed in an upright position... -
Page 9: Horizontal Applications & Considerations
WARNING CARBON MONOXIDE POISONING HAZARD Failure to follow the steps outlined below for each ap- pliance connected to the venting system being placed into operation could result in carbon monoxide poisoning or death. The following steps shall be followed with each appliance connected to the venting system placed in operation, while any other appliances connected to the venting system are not in operation:... -
Page 10: Front Cover Pressure Switch Tube Location
Front Cover Pressure Switch Tube Location AVERTISSEMENT When a furnace is installed horizontally with left side down, the front cover pressure switch tube must be re-located to the lower port of the collector box cover. RISQUE D’INTOXICATION AU MONOXYDE DE CARBONE 1. -
Page 11: Drain Pan
Drain Pan components of another manufacturer. Refer to the following A drain pan must be provided if the furnace is installed chart for plastic pipe & fittings specifications. above a conditioned area. The drain pan must cover the VENTING MATERIAL REQUIREMENTS entire area under the furnace (and air conditioning coil if ASTM STANDARD applicable). -
Page 12: Pipe Sizing
place during the summer months when humid air enters intake or flue vent pipe is to be installed above a finished an intake pipe that runs through a cool basement or other ceiling or other area where dripping of condensate will conditioned space. - Page 13 Increased Clearance Configuration Figure 7 WARNING Edges of sheet metal holes may be sharp. Use gloves as a Figure 9 precaution when removing hole plugs. Combustion Air Pipe Connection If the furnace is being installed without a combustion air pipe, a 90° elbow should be used on the combustion air intake to guard against blockage.
- Page 14 to proper condensate disposal location. A loop in the drain tube can serve as a trap. The unused RF000142 drain fitting should be capped. A tee installed in the vent and/or intake pipe is also an acceptable method of capturing condensation. For vertical vent piping, a PVC wye can be used for capturing condensation (see Figure 10).
- Page 15 7. Use the four self-tapping screws removed in step 1 to secure flange to cabinet. The combustion air intake termination of a direct vent 8. Connect drain hose to the uncapped port on the application should not terminate in an area which is RF000142 coupling, refer to page 20, Section frequently dusty or dirty.
- Page 16 12" MIN. Horizontal vent pipe terminations should be as shown in the following figures. To secure the pipe passing through the wall and prohibit damage to piping connections, a VENT/FLUE TEE ( OPTIONAL) coupling should be installed on either side of the wall and 45°...
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Page 17: Vent/Intake Terminations For Installation Of Multiple Direct Vent Furnaces
Al lowabl e Installation O rient ati on 90° ELBOWS H orizontal Installation Ve rtica l Installation Side Wall Vent Kit Figure 22 Side Wall Vent Kit Option This kit is to be used with 2” or 3” direct vent systems. The Combustion Air Intake may also be snorkeled vent kit must terminate outside the structure and may be to obtain 12”... -
Page 18: Upflow Model Installed Vertically
NOTE: In vertical installations, air conditioning condensate from backing up into the furnace, if the coil condensate may drain into the furnace trap common drain was blocked. as long as there is a trap between the coil and the furnace trap and the drain pipe is not terminating Upflow Model Installed Vertically below the water level of the furnace trap. -
Page 19: Upflow Model Installed Horizontally With Left Side Down
5. Refer to Field Supplied Drain section for instructions cabinet through the cabinet drain hole nearest the on field supplied/installed drain on outlet of furnace top, secure it to the barbed fitting in the elbow with a trap. red clamp. 6. -
Page 20: Electrical Connections
2. Install 90°radius end of hose #2 on RF000142 drain 7. Unused vent-drain elbow drip leg port must be sealed to prevent flue gases from escaping. outlet and secure with a red clamp. Insert the rubber plug removed in step 6 into the 3. -
Page 21: Volt Thermostat Wiring
120 Volt Line Connections for a left side electrical connection. To make electrical Before proceeding with electrical connections, ensure connections through the opposite side of the furnace, the that the supply voltage, frequency, and phase correspond junction box must be relocated to the right side prior to to that specified on the unit rating plate. -
Page 22: Single-Stage Heating Thermostat Application
BOARD TERMINAL 24 VAC BOARD TERMINAL Thermostat CONNECTIONS Thermostat CONNECTIONS Remote Remote Condensing Unit Condensing Unit (Single-Stage Cooling) (Two-Stage Cooling) Optional Low Voltage Ventilation Optional INDOOR 24 VAC BOARD TERMINAL Optional The Ventilation connections provide dry contact for Optional Thermostat CONNECTIONS field ventilator wiring connections. -
Page 23: Fossil Fuel Applications
115 VAC EAC INLET GAS SUPPLY PRESSURE Natural Gas Minimum: 4.5" W.C. Maximum: 10.0" W.C. 115 VAC Table 4 The furnace rating plate includes the approved furnace gas input rating and gas types. The furnace must be equipped to operate on the type of gas applied. This includes any conversion kits required for alternate fuels and/or high altitude. -
Page 24: Gas Piping Connections
Gas Piping Connections meter and unit within six feet of the unit. If a union is installed, the union must be downstream of the WARNING manual shutoff valve, between the shutoff valve and the furnace. To avoid the possibility of explosion or fire, never use a •... -
Page 25: Gas Piping Checks
A semi-rigid connector to the gas piping can be used Disconnect this unit and shutoff valve from the gas supply outside the cabinet per local codes. From the elbow, the piping system before pressure testing the supply piping length of pipe and the fittings required will vary by the side system with pressures in excess of ½... -
Page 26: Checking Duct Static
Checking Duct Static Bottom Return Air Opening [Upflow Models] WARNING The bottom return air opening on upflow models utilizes a “lance and cut” method to remove sheet metal from the Edges of sheet metal holes may be sharp. Use gloves as duct opening in the base pan. -
Page 27: Upright Installations
under the warranty. menus. When the center button is pressed in the main menu, the furnace control will go to the option menu and On upflow units, guide dimples locate the side return cutout display the default or previously selected option. Pressing locations. -
Page 28: Furnace Start-Up
selected, the furnace will do the following: The R-32 function on the furnace control board may need 1. Display the A2L Refrigerant Leakage code (EAL) to be enabled or disabled if any element of the installation 2. Shut down the gas operation changes from the original setup. -
Page 29: Drain Trap Priming
Check for leaks using an approved chloride-free soap and Control Board Main Menu water solution, an electronic combustible gas detector, or other approved method. Main Menu Option Menu Display Menu Description Additional Info Text SEGT #1 SEGT#2 SEGT#3 SEGT #1 SEGT#2 SEGT#3 ( xx: code numbers ) - See chart for Active Alarm menu Alarm Code definition... -
Page 30: Gas Supply Pressure Measurement
GAS SUPPLY PRESSURE MEASUREMENT 3. Turn ON the gas supply and operate the furnace and all other gas consuming appliances on the same gas supply line. Gas Pressure Test 4. Measure furnace gas supply pressure with burners The line pressure supplied to the gas valve must be within firing. -
Page 31: Temperature Rise
7. Measure the gas manifold pressure with burners NOTE: The final manifold pressure cannot vary firing. Adjust manifold pressure using the Manifold by more than ± 0.2” w.c. for Natural gas from the Gas Pressure table 8 shown below. specified setting. Consult your local gas supplier if 8. -
Page 32: Circulator Blower Speeds
AVAILABLE SPEEDS THERMOSTAT CALL (FSd menu) SUPPLY Circulation Speed Table RETURN Cooling Mode Speed Selection To change the main blower speed in COOLING mode, follow the following steps: Temperature Rise Measurement Figure 39 NOTE: If Heat Pump system is configured in OdS Circulator Blower Speeds menu (HP1 or HP2) COOLING thermostat calls will This furnace is equipped with a multi-speed circulator... - Page 33 THERMOSTAT CALL AVAILABLE SPEEDS THERMOSTAT CALL AVAILABLE SPEEDS (OdS: Terminal) (AC2 menu) (OdS: Terminal) (HP1 menu) 2AC: Y1 + Y2 1HP: Y1 2HP: Y1 + Y2 + O Two Stage Cooling Speed Table Single Stage HP Heating Speed Table Gas Heating Mode Speed Selection THERMOSTAT CALL AVAILABLE SPEEDS To change the main blower speed in GAS HEATING mode,...
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Page 34: Normal Sequence Of Operation
NORMAL SEQUENCE OF OPERATION control board with 24 vac. on Y1 or Y1 and G terminals. • The 7-Segment will display: 1 A C. Power Up • The compressor and condenser fan are energized. The normal power up sequence is as follows: •... -
Page 35: Operational Checks
OPERATIONAL CHECKS furnace control board with 24 vac. on Y2 or Y2 and G terminals. The burner flames should be inspected with the burner • The 7-Segment will display: 2 H P compartment door installed. Flames should be stable, • The compressor and condenser fan are energized. quiet, soft, and blue (dust may cause orange tips but •... -
Page 36: Troubleshooting
switches guard against insufficient airflow (combustion 2. Manual power interruption. Interrupt 115 volt power air and flue products) through the heat exchanger and/or to the furnace. NOTE: If the condition which originally caused the blocked condensate drain conditions. lockout still exists, the control will return to Flame Sensor lockout. -
Page 37: Before Leaving An Installation
Condensate Trap and Drain System To remove filters from an external filter rack in an upright (Qualified Servicer Only) upflow installation, follow the directions provided with Annually inspect the drain tubes, drain trap, and field- external filter rack kit. supplied drain line for proper condensate drainage. Check drain system for hose connection tightness, blockage, and Horizontal Unit Filter Removal leaks. -
Page 38: Troubleshooting Chart
TROUBLESHOOTING CHART Symptom Fault Description Corrective Actions Status Normal operation I dL Normal operation None Furnace fails to Internal Faults or IRQ Loss in Control Replace integrated control board operate Board Locate and correct gas interruption Check front cover pressure switch operation and verify proper drainage (hose, wiring, contact operation), correct if necessary Furnace lockout due to an excessive... - Page 39 TROUBLESHOOTING CHART Symptom Fault Description Corrective Actions Status Flame sense micro amp signal is minimal Clean flame sensor if coated or oxidized Inspect for proper flame Flame sensor is coated/oxidized sensor alignment Flame sensor incorrectly positioned in burner fame Check inlet air piping for blockage, proper length, elbows, and Lazy burner flame due to improper gas pressure or termination Normal furnace...
- Page 40 TROUBLESHOOTING CHART TROUBLESHOOTING CHART Symptom Fault Description Corrective Actions Status Furnace fails to operate Check Red, Black, White harness & connections to inducer & control board Analog Pressure Sensor span error Check pressure hoses to pressure sensor and pressure switch Furnace fails to operate Analog Pressure Sensor pressure error Check Red, Black, White harness &...
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Page 41: Airflow Dr96Sn
AIRFLOW DR96SN-U COOLING & CIRCULATION AIRFLOW EXTERNAL STATIC PRESSURE, (INCHES WATER COLUMN) THERMOSTAT MODEL TAP # 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 CALL CFM CFM CFM CFM CFM WATTS CFM WATTS CFM WATTS CFM WATTS 1043 1011 976 DR96SN0403BU* Y1 / Y2 / G F05^... - Page 42 AIRFLOW...
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Page 43: Wiring Diagram Dr96Sn
WIRING DIAGRAM DR9S96** PRESSURE TRANSDUCER UNUSED 115 VAC/ 1 Ø /60 HZ COLLECTOR BOX POWER SUPPLY WITH PRESSURE SWITC OVERCURRENT PROTECTION DEVICE ID BLOWER PRESSURE SWITCH GAS VALVE WARNING:DISCONNECT POWER BEFORE SERVICING. WIRING TO UNIT MUST BE PROPERLY POLARIZED DISCONNECT AND GROUNDED. -
Page 44: Start-Up Checklist
START-UP CHECKLIST Furnace Model Number Serial Number ELECTRICAL Line Voltage (Measure L1 to N and N to Ground Voltage) L - N N - G Secondary Voltage (Measure Transformer Output Voltage) R - C Blower Amps BLOWER EXTERNAL STATIC PRESSURE Return Air Sta�c Pressure IN. - Page 45 THIS PAGE INTENTIONALLY LEFT BLANK...
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- Page 48 CUSTOMER FEEDBACK Daikin is very interested in all product comments. Please fill out the feedback form on the following link: https://daikincomfort.com/contact-us You can also scan the QR code on the right to be directed to the feedback page. Our continuing commitment to quality products may mean a change in specifications without notice.
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