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Installation Instructions
for DM96SN 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.
© 2021-2023
IOD-2032C
07/2023
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.
WARNING
WARNING
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Table of Contents
Troubleshooting
Related Manuals for Daikin DM96SN0403BU
Summary of Contents for Daikin DM96SN0403BU
- Page 1 INSTALLATION INSTRUCTIONS Installation Instructions for DM96SN Ultra Low NOx WARNING Gas Furnace ONLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL, ADJUST, SERVICE, MAINTENANCE OR REPAIR (Type FSP CATEGORY IV Direct (HEREINAFTER, “SERVICE”) THE EQUIPMENT SPECIFIED IN THIS MANUAL SHOULD SERVICE THE EQUIPMENT. or Non Direct Vent Air Furnace) (Type FSP CATÉGORIE IV Direct THIS EQUIPMENT IS NOT INTENDED FOR USE BY...
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Page 2: Table Of Contents
Table of Contents This furnace is manufactured for use with natural gas only. Install this furnace only in a location and position Safety Considerations ..........2 as specified in LOCATION REQUIREMENTS & Product Application ............4 CONSIDERATIONS section and INSTALLATION Location Requirements & Considerations ....5 POSITIONS section of this manual. -
Page 3: Shipping Inspection
WARNING WARNING This product contains or produces a chemical or chemicals Heating unit should not be utilized without reasonable, rou- which may cause serious illness or death and which are tine inspection, maintenance and supervision. If the building known to the State of California to cause cancer, birth in which any such device is routinely inspected, maintained defects or other reproductive harm. -
Page 4: Product Application
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. -
Page 5: Location Requirements & Considerations
The furnace must be installed indoors (i.e., attic space, The rated heating capacity of the furnace should be greater crawl space, or garage area provided the garage area is than or equal to the total heat loss of the area to be heated. enclosed with an operating door). -
Page 6: Clearances And Accessibility
than the base of the furnace. Refer to the Horizontal Clearances and Accessibility Applications and Considerations for leveling of Clearance in accordance with local installation horizontal furnaces. codes, the requirements of the gas supplier and the • Ensure upflow or horizontal furnaces are not installed manufacturer’s installation instructions. -
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
INSTALLATION POSITIONS HORIZONTAL APPLICATIONS & CONSIDERATIONS This furnace may be installed in an upright position or horizontal on either the left or right side panel. Do not install this furnace on its back. For upright upflow When installing a furnace horizontally, additional furnaces, return air ductwork may be attached to the side consideration must be given to the following: panel(s) and/or basepan. - Page 9 WARNING AVERTISSEMENT CARBON MONOXIDE POISONING HAZARD RISQUE D’INTOXICATION AU MONOXYDE DE CARBONE Failure to follow the steps outlined below for each ap- Si les étapes décrites ci-dessous ne sont pas suivies pour pliance connected to the venting system being placed into chacun des appareils raccordés au système de ventilation operation could result in carbon monoxide poisoning or au moment de sa mise en marche, cela peut entraîner une...
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Page 10: Alternate Electrical And Gas Line Connections
Front Cover Pressure Switch Tube Location This furnace is dual certified and may be installed as a When a furnace is installed horizontally with left side down, non-direct vent (single pipe) or direct vent (dual pipe) the front cover pressure switch tube must be re-located to appliance. -
Page 11: Installation
Vent pipe must be installed to maintain a minimum 1/4 inch VENTING MATERIAL REQUIREMENTS per foot downward slope toward the furnace to return ASTM STANDARD condensate to the furnace’s drain system. Condensation SCHEDULE 40 PIPE D1785 may also occur in the intake pipe. This commonly takes SDR 21 or 26 PIPE D2241 place during the summer months when humid air enters... -
Page 12: Vent Pipe Connection
MODEL pipe, a 90° elbow should be used on the combustion air (in) intake to guard against blockage. DM96SN0403BU On up flow / horizontal models, secure the combustion DM96SN0603BU air intake pipe to the air intake coupling using a rubber coupling supplied with the furnace. - Page 13 have a field supplied, trapped drain tube or pipe, free-draining to proper condensate disposal location. A loop in the drain tube can serve as a trap. Alternate Vent & Intake Pipe Connections (Upflow/Horizontal models only) When installing a furnace horizontally with the left side down, alternate flue and combustion air pipe connections may be used.
- Page 14 Pipe Termination Products of combustion must always be vented outside. A WARNING vent pipe must never terminate in an attic, crawl space, or any other part of a dwelling. Follow the vent pipe & intake To avoid bodily injury, fire or explosion, solvent cements must be kept away from all ignition sources (i.e., sparks, pipe termination requirements listed below as well as all open flames, and excessive heat) as they are combustible...
- Page 15 Non-Direct Vent & Direct Vent Vent/Flue Terminations Non-Direct Vent Vent/Flue Termination No Terminations Above Walkway <10' 4' min. 12" 3' min. min. 12" min. Grade or Highest 12" min. Anticipated Snow Level Non-Direct Vent 12" min. Vent/Flue Termination Forced Air Inlet Direct Vent Vent/Flue Termination...
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Page 16: Vent/Intake Terminations For Installation Of Multiple Direct Vent Furnaces
10”- 24” 6” MAX 3”MIN 24”MAX 4” MIN 12” MIN SEPARATION 3” MIN 12" MIN. TO GRADE OR HIGHEST ANTICIPATED SNOW LEVEL 12” MIN TO GRADE OR HIGHEST ANTICIPATED SNOW LEVEL Standard Horizontal Terminations (Dual Pipe) Figure 17 Termination of Multiple Direct Vent Furnaces Figure 20 Vent/Intake Terminations For Installation of 90°... -
Page 17: Condensate Drain Lines & Drain Trap
CONDENSATE DRAIN LINES & DRAIN TRAP A condensing gas furnace achieves its high level of efficiency by extracting heat from the products of combustion to the point where condensation takes place. The condensate must be collected in the furnace drain trap and routed to an appropriate drain location in compliance with local and national codes. -
Page 18: Upflow Model Installed Vertically
Upflow Model Installed Vertically The trap and factory installed hoses remain as shipped. The furnace drain may exit either the right or left side of the furnace cabinet. Both sides of the cabinet have two .875” diameter holes which can be used interchangeably for drain and low voltage wiring purposes. -
Page 19: Upflow Model Installed Horizontally With Left Side Down
6. Draining the Collector Box: Install the non-grommet 8. Locate hose #5 and cut 3” from the non-grommet end of hose #11 from outside the cabinet in the end. Discard the section without the grommet. bottom drain hole. Install on collector box and secure 9. -
Page 20: Electrical Connections
6. Insert 100° elbow in the cut end of hose #5. Use a separate fused branch electrical circuit containing 7. Locate hose #6. Using red clamps, connect between properly sized wire, and fuse or circuit breaker. The fuse the coupling and 100° elbow, cutting off excess or circuit breaker must be sized in accordance with the tubing. -
Page 21: Volt Thermostat Wiring
BOARD TERMINAL 24 VAC Thermostat CONNECTIONS Thermostat Remote Condensing Unit (Single-Stage Cooling) Optional Line voltage connections can be made through either the Optional INDOOR INDOOR 24 VAC BOARD TERMINAL 24 VAC BOARD TERMINAL Optional right or left side panel. The furnace is shipped configured Thermostat Optional CONNECTIONS... -
Page 22: High Altitude Derate
“FURNACE” terminal strip on the fossil fuel control board. MODEL Presure Pressure Natural Venting (3 in at 5000ft at 7500ft only) GAS SUPPLY AND PIPING DM96SN0403BU 100ft 2.5" w.c. 2.4" w.c. 6.5 - 8.5 DM96SN0603BU 100ft DM96SN0805CU 80ft CAUTION Table 5... -
Page 23: Gas Piping Connections
Gas Piping Connections • Install a manual shutoff valve between the gas meter and unit within six feet of the unit. If a union WARNING is installed, the union must be downstream of the manual shutoff valve, between the shutoff valve and To avoid the possibility of explosion or fire, never use a the furnace. -
Page 24: Circulating Air & Filters
A semi-rigid connector to the gas piping can be used Isolate this unit from the gas supply piping system by outside the cabinet per local codes. From the elbow, the closing its external manual gas shutoff valve before length of pipe and the fittings required will vary by the side pressure testing supply piping system with test pressures chosen, location of union and cabinet width. -
Page 25: Bottom Return Air Opening [Upflow Models]
Total external static refers to everything external to the NOTE: Airflow area will be reduced by furnace cabinet. Cooling coils, filters, ducts, grilles, approximately 18% if duct flanges are not unfolded. This could cause performance issues registers must all be considered when reading your total external static pressure. -
Page 26: Startup Procedure & Adjustment
Minimum Recommended Filter Size^ menu using the push buttons to properly configure the outdoor system. Selections for AC1, AC2, HP1, HP2 must DM96SN0403BU* 1 - 16 X 25 Side or Bottom be made to enable specific fan speeds and thermostat... -
Page 27: Drain Trap Priming
Drain Trap Priming Control Board Main Menu The drain trap MUST be primed prior to furnace startup. Main Menu Option Menu To prime, fill both sides of the drain trap with water. Description Default LED Display Display This ensures proper furnace drainage upon startup and i dl prohibits the possibility of flue gases escaping through the Idle - system awaiting input... -
Page 28: Furnace Shutdown
Furnace Shutdown Regulator Cover 1. Set the thermostat to the lowest setting. Screw The integrated control will close the gas valve and extinguish flame. Following a 30 second delay, the induced draft blower will be de-energized. The circulator blower will shut down when the time delay expires (Time delay is selectable on all models). -
Page 29: Gas Manifold Pressure Measurement And Adjustment
13. Close thermostat contacts “R” and “W” to energize the valve. Using a leak detection solution or soap suds, check for leaks at outlet or screw (White-Rodgers valve). Bubbles forming indicate a leak. SHUT OFF GAS AND REPAIR ALL LEAKS IMMEDIATELY! NOTE: For gas to gas conversion, consult your dealer for appropriate conversion. -
Page 30: Circulator Blower Speeds
Determine and adjust temperature rise as follows: 1. Determine the tonnage of the cooling system 1. Operate furnace with burners firing for approximately installed with the furnace. If the cooling capacity is ten minutes. Ensure all registers are open and all in BTU/hr divide it by 12,000 to convert capacity to duct dampers are in their final (fully or partially open) tons. - Page 31 1. Press menu button until LED displays “AC1” (for NOTE: Each furnace model contains different single stage COOLING) or “AC2” (for Two stage allowable gas heating speeds. Allowable gas heating speeds will be visible within gAF fan speed COOLING). Press option button and the LED will display the currently selected speed number as Fxx menu.
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Page 32: Normal Sequence Of Operation
On/Off Fan Delay Selection • EAC terminal is de-energized To change the fan on or off delay for COOLING, HP • Furnace awaits next call from thermostat. HEATING & GAS HEATING modes, see the following steps: Cooling Mode 1. Press menu button until LED displays the desired on/ The control board support two stages of cooling. -
Page 33: Operational Checks
• The circulator fan is energized at HP1 fan speed • If Y without O and W are present simultaneously, the after the HP on delay period. The electronic air blower shall be energized at HP Heat Speed after cleaner, EAC, and humidifier, HUM, relays will close HP Heat On Delay, then, switch the blower speed to the contacts. -
Page 34: Troubleshooting
Burner Temperature Switch 4. Discharge your body to ground before removing The burner temperature switch is mounted on the burner a new control from its container. Follow steps 1 assembly to monitor the burner box temperature. It is through 3 if installing the control on a furnace. normally closed (electrically), auto-reset sensor. -
Page 35: Maintenance
MAINTENANCE To remove: 1. Turn OFF electrical power to furnace. 2. Remove filter(s) from the central return register or WARNING ductwork. 3. Replace filter(s) by reversing the procedure for removal. HIGH VOLTAGE! 4. Turn ON electrical power to furnace. To prevent personal injury or death due to electrical shock, disconnect electrical power BEFORE performing any service or Media Air Filter or Electronic Air Cleaner... -
Page 36: Before Leaving An Installation
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 37: Troubleshooting Chart
TROUBLESHOOTING CHART Symptom LED Status Fault Description Corrective Actions Stand-by Mode Normal Operation None Normal Operation Furnace fails to operate Internal Control Fault Replace control board Locate and correct gas interruption Furnace lockout due to an excessive number of ignition “retries” (3 Replace or realign igniter total) Check flame sense signal, clean sensor if coated or oxidized... - Page 38 Check wire connec�ons to motor and PCB Check motor 120V line wire is connected to terminal inside Furnace fails to operate Circulator current unexpected current transformer loop Furnace fails to operate No shared data Populate shared data set using Daikin Data Loader App ...
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Page 39: Airflow Dm96Sn
AIRFLOW DM96SN-U COOLING & CIRCULATION AIRFLOW EXTERNAL STATIC PRESSURE, (INCHES WATER COLUMN) THERMOSTAT MODEL TAP # CALL 1043 1011 DM96SN0403BU* Y1 / Y2 / G F05^ 1080 1051 1021 1182 1155 1129 1102 1075 1048 1020 1193 1164 1136 1108... - Page 40 EXTERNAL STATIC PRESSURE, (INCHES WATER COLUMN) THERMOSTAT TEMP MODEL TAP # CALL RANGE RISE RISE RISE RISE RISE F04^ 1043 1011 15 - 45 DM96SN0403BU* W/W1 1080 1051 1021 1099 1060 1018 30 - 60 DM96SN0603BU* W/W1 1125 1086 1047 1008 F06^...
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Page 41: Wiring Diagram Dm96Sn
WIRING DIAGRAM DM96SN-U PRESSURE TRANSDUCER 115 VAC/ 1 Ø /60 HZ POWER SUPPLY WITH UNUSED OVERCURRENT PROTECTION DEVICE ID BLOWER PRESSURE SWITCH DISCONNECT TR (2) GAS VALVE INTEGRATED CONTROL MODULE AUTO RESET PRIMARY LIMIT CONTROL SURFACE IGNITER 2 CIRCUIT MVC (5) VALVE CONNECTOR PRESSURE... -
Page 42: 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 Static Pressure IN. - Page 43 THIS PAGE INTENTIONALLY LEFT BLANK...
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Page 44: Customer Feedback
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. PRODUCT REGISTRATION Thank you for your recent purchase.
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