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Installation Instructions
for DR80SN & DD80SN
Gas Furnace
CATEGORY I
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.
RECOGNIZE THIS SYMBOL
AS A SAFETY PRECAUTION.
As a professional installer you have an obligation to know
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 herein take
precedence.
*NOTE: Please contact your distributor or our website for the
applicable Specification Sheet referred to in this manual.
Our continuing commitment to quality products may mean a change in specifications without notice.
© 2024
IOD-2035B
12/2024
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
(HEREINAFTER, "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.
80% HEX
WARNING
WARNING
DO NOT LIFT
PRODUCT USING
HEAT EXCHANGER
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Related Manuals for Daikin DR80SN
Summary of Contents for Daikin DR80SN
- Page 1 INSTALLATION INSTRUCTIONS Installation Instructions WARNING for DR80SN & DD80SN Gas Furnace ONLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL, ADJUST, SERVICE, MAINTENANCE OR REPAIR (HEREINAFTER, “SERVICE”) THE EQUIPMENT SPECIFIED IN CATEGORY I THIS MANUAL SHOULD SERVICE THE EQUIPMENT. THIS EQUIPMENT IS NOT INTENDED FOR USE BY...
- Page 2 TABLE OF CONTENTS This furnace is manufactured for use with natural gas. It may be field converted to operate on L.P. gas by using the appropriate L.P. conversion kit listed in the PROPANE Safety Considerations ..........2 GAS/HIGH ALTITUDE INSTALLATIONS section of this Product Application ............4 manual.
- Page 3 RISQUE D'EMPOISONNEMENT AU MONOXYDE Advertencia especial para la instalación de calentadores ó manejadoras de aire en áreas cerradas como estacionamientos ó cuartos de servicio. Ce�e ven�la�on est nécessaire pour éviter le danger d Las emisiones de monóxido de carbono pueden circular a través au CO pouvant survenir si un appareil produisant du m del aparato cuando se opera en cualquier modo.
- Page 4 Additional Safety Considerations 2. Firmly touch a clean, unpainted, metal surface of the • This furnace is approved for Category I Venting only. furnace near the control. Any tools held in a person’s • Provisions must be made for venting combustion hand during grounding will be discharged.
- Page 5 Your unit model type determines which installation must have flooring. procedures must be used. For DR80SN models, you must follow instructions for Horizontal Left, Horizontal Right or Upflow installations only. These furnaces are not approved WARNING for Downflow installations.
- Page 6 Follow the instructions listed below when selecting a • If the furnace is installed horizontally, the furnace furnace location. Refer also to the guidelines provided in access doors must be vertical so that the burners fire the Combustion and Ventilation Air Requirements. horizontally into the heat exchanger.
- Page 7 Top clearance for horizontal configuration - 1” carpeting, tile, or other combustible materials other than Installation Positions wood flooring. DR80SN model furnaces may be installed vertically (upflow) or horizontally with left or right side down. Furnace Suspension DD80SN model furnaces may be installed vertically If suspending the furnace from rafters or joist, use 3/8”...
- Page 8 For upflow and horizontal installations, the furnace and/ Existing Furnace Removal or indoor coil should be installed so that the equipment is WARNING at least 1-1/2 inches above the drain pan. Do not install the furnace and/or indoor coil directly into the auxiliary/ CARBON MONOXIDE POISONING HAZARD secondary drain pan and do not use any wood product Failure to follow the steps outlined below for each...
- Page 9 DR80SN models can be rotated 90 degrees for Category I venting. For furnaces installed vertically or horizontally, a four-inch single wall pipe can be used to extend the The DR80SN and DD80SN furnaces are provided with a induced draft blower outlet ½”...
- Page 10 MASONRY CHIMNEYS THIS PRODUCT IS NOT DESIGNED FOR COUNTERCLOCKWISE INDUCED DRAFT BLOWER ROTATION. WARNING Vent the furnace in accordance with the National Fuel Gas Possibility of property damage, personal injury, death or Code NFPA 54/ANSI Z223.1 - latest edition. damaging condensation can occur inside masonry chimneys when a single fan-assisted Category I appliance (80% AFUE Venting furnace) is vented without adequate dilution air.
- Page 11 Wiring Harness 1. Remove both doors from the furnace. The wiring harness is an integral part of this furnace. Field 2. Remove and save the screws holding the junc tion alteration to comply with electrical codes should not be box to the right side of the furnace. required.
- Page 12 NOTE: Do not remove the gas valve inlet plug Consult the furnace Specification Sheet for appropriate before the gas line is installed. Replace if water manufacturer’s kits for propane gas and/or high altitude or debris has been introduced. installations. The indicated kits must be used to insure safe and proper furnace operation.
- Page 13 The gas piping supplying the furnace must be properly – Use listed gas appliance connectors in sized based on the gas flow required, specific gravity of the accordance with their instructions. Connectors gas, and length of the run. The gas line installation must must be fully in the same room as the furnace.
- Page 14 NOTE: Never exceed specified pressures for testing. Higher pressure may cause gas valve 5 to 15 PSIG First Stage (20 PSIG Max.) Regulator failure. Continuous 11" W.C. Disconnect this unit and shutoff valve from the gas supply 200 PSIG piping system before pressure testing the supply piping Second Stage Maximum Regulator...
- Page 15 A closed return duct system must be used, with the Checking Duct Static return duct connected to the furnace. NOTE: Ductwork Refer to your furnace rating plate for the maximum ESP must never be attached to the back of the furnace. For (external duct static) rating.
- Page 16 NOTE: Both readings may be taken simultaneously A new home may require more frequent replacement until and read directly on the manometer if so desired. all construction dust and dirt is removed. If an air conditioner coil or Electronic Air Upflow Models Minimum Recommended Filter Size Cleaner is used in conjunction with the furnace,...
- Page 17 removed.
- Page 18 Field Installed Accessories 115 VAC EAC Additional accessories that do not have dedicated 115 VAC HUM terminals on the furnace control board may require an additional daughter board to be installed. Please refer to service manual on your product for more information. NOTE: This furnace is equipped with a control board that is capable of monitoring for R-32 refrigerant leaks in the indoor evaporator coil.
- Page 19 24 VOLT VENTILATION (OPTIONAL) 24 VOLT A2L ALARM (OPTIONAL)) R-32 SENSOR 24 VOLT HUM. & HUMIDISTAT 24 Volt Humidifier Connection Figure 10 • The control module performs a gas valve circuitry Heating Mode Speed Selection check to verify gas valve relay state and presence of To change the main blower speed in HEATING mode, no voltage at the valve.
- Page 20 Continuous Fan Mode Speed Selection • Following the Cool Mode Fan Off Delay period, the To change the main blower speed in circulation mode, cool circulator and air cleaner relay are de-energized follow the following steps: Cooling Mode Speed Selection 1.
- Page 21 Gas Supply Pressure Measurement 3. Turn ON the gas supply and operate the furnace and all other gas consuming appliances on the same gas Gas Valve ON/OFF Selector Switch supply line. Inlet Pressure 4. Measure furnace gas supply pressure with burners firing.
- Page 22 13. Close thermostat contacts “R” and “W” to energize The R-32 function on the furnace control board may need the valve. to be enabled or disabled if any element of the installation Using a leak detection solution or soap suds, check for changes from the original setup.
- Page 23 1. Display the A2L Refrigerant Leakage code (EAL) Filter Removal 2. Shut down the gas operation Depending on the installation, differing filter arrangements 3. Energize the optional ventilation and alarm outputs. can be applied. Filters can be installed in either the central 4.
- Page 24 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 sense signal. If the flame sense signal drops too low the furnace will not sense flame and will lock out.
- Page 25 AIRFLOW TABLES DR80SN FAN & COOLING AIFLOW EXTERNAL STATIC PRESSURE (INCHES WATER COLUMN) THERMOSTAT MODEL TAP # CALL Watts Watts Watts Watts F04^ DR80SN0403A* Y/Y1, Y2, G 1330 1295 1273 1251 1223 1195 1168 1142 1130 1090 1059 1022 1158...
- Page 26 AIRFLOW TABLES DR80SN HEATING AIFLOW EXTERNAL STATIC PRESSURE, (INCHES WATER COLUMN) T.STAT TEMP MODEL TAP # CALL RANGE RISE RISE RISE RISE RISE F01^^ F02^ DR80SN0403A* W/W1 25-55 F01^^ F02^ 1268 1221 1188 1154 1122 1091 1060 1029 DR80SN0603A* W/W1...
- Page 27 DD80SN AIRFLOW TABLES FAN & COOLING AIRFLOW FAN & COOLING AIFLOW EXTERNAL STATIC PRESSURE, (INCHES WATER COLUMN) EXTERNAL STATIC PRESSURE (INCHES WATER COLUMN) T.STAT THERMOSTAT MODEL TAP # MODEL TAP # CALL CALL Watts Watts Watts Watts 1120 1081 1053 1022 1120 1081...
- Page 28 AIRFLOW TABLES DD80SN HEATING AIFLOW EXTERNAL STATIC PRESSURE, (INCHES WATER COLUMN) T.STAT TEMP MODEL TAP # CALL RANGE RISE RISE RISE RISE RISE F01^^ F02^ 1120 1081 1053 1022 DD80SN0403AX W/W1 25-55 1073 1031 1003 F01^^ F02^ 1035 DD80SN0603AX W/W1 30-60 F04^^ F01^^...
- Page 29 1 STAGE STATUS CODES LED Display Menu Description Notes Main Option Menu Menu ( xx: code numbers ) Active Alarm menu Er r ( xx: code numbers ) Last 10 Faults Code Release Number CR Number r Fd yes, no Reset to Factory Default ( xx: Blower Speed Number Blower Speed for Continuous Fan Mode...
- Page 30 1 STAGE STATUS CODES STATUS MENU Main Mode Menu Idle I dL Continous Fan Compressor Cooling, Low Stage Compressor Cooling, High Stage Gas heat - Single Stage Control OEM test Mode...
- Page 31 1 STAGE TROUBLESHOOTING CODES Symptom Fault Description Corrective Actions Status Normal operation I dL Normal operation None 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 Replace or realign igniter Furnace fails to number of ignition “retries”...
- Page 32 1 STAGE TROUBLESHOOTING CODES Symptom Fault Description Corrective Actions Status Check and correct wiring from integrated control Problem with igniter circuit module to igniter Improperly connected or shorted Furnace fails to Diagnose and replace shorted igniter as needed igniter operate Verify and correct unit ground wiring if needed Poor unit ground Igniter relay fault on integrated...
- Page 33 WIRING DIAGRAM SURFACE TO 115 VAC/ 1 /60 HZ IGNITER POWER SUPPLY WITH OVERCURRENT PROTECTION DEVICE VALVE 2 CIRCUIT WARNING: DISCONNECT CONNECTOR POWER BEFORE SERVICING. WIRING TO UNIT MUST BE PROPERLY POLARIZED FLAME AND GROUNDED ID BLOWER DISCONNECT SENSOR PRESSURE SWITCH NOTES: 1.
- Page 34 START-UP CHECKLIST...
- Page 35 THIS PAGE IS INTENTIONALLY LEFT BLANK...
- Page 36 CUSTOMER FEEDBACK Daikin Comfort Technologies 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.
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