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Installation Instructions for DM96SC
Ultra Low NOx Variable Speed 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.
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 here take
precedence.
Do not bypass safety devices.
Our continuing commitment to quality products may mean a change in specifications without notice.
© 2021-2023
IOD-2025H
06/2023
Installer:
Affix all manuals
adjacent to the unit.
WARNING
19001 Kermier Rd., Waller, TX 77484
www.daikincomfort.com
INSTALLATION INSTRUCTIONS
RECOGNIZE THIS SYMBOL
AS A SAFETY PRECAUTION.
*NOTE: Please contact your distributor or our
website for the applicable Specification Sheet
referred to in this manual.
Only personnel that have been trained to install, adjust,
service, maintenance or repair (hereinafter, "service")
the equipment specified this manual should service the
equipment.
This equipment is not intended for use by persons
(including children) with reduced physical, sensory or
mental capacities, 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.
90% HEX
WARNING
DO NOT LIFT
PRODUCT USING
HEAT EXCHANGER
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Summary of Contents for Daikin DM96SC
- Page 1 INSTALLATION INSTRUCTIONS Installation Instructions for DM96SC Ultra Low NOx Variable Speed 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...
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Page 2: Table Of Contents
CONTENTS This device, which was assembled by Daikin Comfort Technologies Manufacturing, L.P., contains a component that is classified as an Safety Considerations ..........2 intentional radiator. This intentional radiator has been certified by the FCC: FCC ID QOQBGM13P. And this international radiator has an Product Description .............5... - Page 3 as specified in LOCATION REQUIREMENTS & CONSIDERATIONS section and INSTALLATION WARNING POSITIONS section of this manual. If the information in these instructions is not followed Provide adequate combustion and ventilation air to the exactly, a fire or explosion may result causing property dam- age, personal injury or loss of life.
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Page 4: Shipping Inspection
The furnace must be carefully inspected on arrival for damage and bolts or screws which may have come loose in transit. In the event of damage the consignee should: 1. Make a notation on delivery receipt of any visible damage to shipment or container. 2. -
Page 5: Product Description
• The furnace is attached to permanent return air Features ducting sealed to the furnace. This furnace is a part of the Daikin Communicating family • A return air temperature range between 60ºF (16ºC) of products. The Daikin Communicating system provides and 80ºF (27ºC) is maintained. -
Page 6: Location Requirements & Considerations
National Fire Protection Association • Ensure adequate combustion air is available for 1 Batterymarch Park the furnace. Improper or insufficient combustion air Quincy, MA 02169-7471 can expose building occupants to gas combustion products that could include carbon monoxide. Refer to CSA International Combustion and Ventilation Air Requirements. -
Page 7: Clearances And Accessibility
DM96SC MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS (INCHES) 1. Seal any unused openings in the venting system. POSITION*... -
Page 8: Thermostat Location
INSTALLATION POSITIONS Thermostat Location The thermostat should be placed approximately five feet from the floor on a vibration-free, inside wall in an area This furnace may be installed in an upright position or having good air circulation. Do not install the thermostat horizontal on either the left or right side panel. -
Page 9: Horizontal Applications & Considerations
HORIZONTAL APPLICATIONS & Leveling Leveling ensures proper condensate drainage from the CONSIDERATIONS heat exchanger. For proper flue pipe drainage, the furnace must be level lengthwise from end to end. The furnace When installing a furnace horizontally, additional should have a slight tilt from back to front with the access consideration must be given to the following: doors downhill from the back panel approximately 1/2”... -
Page 10: Gas Valve
compound to the first two threads. WARNING • Use ground joint unions. • Install a drip leg to trap dirt and moisture before it can enter the gas valve. The drip leg must be a minimum To avoid possible unsatisfactory operation or equipment damage due to underfiring of equipment, use the proper size of 3”... -
Page 11: Gas Piping Checks
– Aluminum alloy tubing must not be used in exterior Manual Shut Off Valve Alternate (upstream from locations. In order to seal the grommet cabinet Union ground joint pipe union) penetration, rigid pipe must be used to reach the Location outside of the cabinet. -
Page 12: High Altitude Installation
WARNING WARNING If the gas furnace is installed in a basement, an excavat- Upon completion of the furnace installation, carefully ed area or confined space, it is strongly recommended to inspect the entire flue system both inside and outside of the contact a certified contractor to install a gas detecting furnace to assure it is properly sealed. -
Page 13: Installation
Piping may run vertically or horizontally and must be VENTING MATERIAL REQUIREMENTS adequately supported to prevent strain on joints, sagging, ASTM STANDARD separation, and detachment from the furnace. Horizontal SCHEDULE 40 PIPE D1785 runs of piping must be supported every three to five SDR 21 or 26 PIPE D2241 feet. -
Page 14: Pipe Sizing
Vent Pipe Connection ACCEPTABLE The vent pipe outlet is sized to accept 2” pipe. Secure vent pipe directly into the furnace fitting with the appropriate glue. Alternately, a small section of 2” pipe may be glued in the furnace socket and a rubber coupling installed TRANSITION NO LESS to allow removal for future service. - Page 15 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 11). It Any of these options must have a field supplied, trapped drain tube or pipe, free- draining to proper condensate disposal location.
- Page 16 All vent terminations (non-direct and direct vent) must terminate at least 3 feet above any forced air inlet located WARNING within 10 feet. The rubber elbow is not designed to support a load. When the rubber elbow is mounted externally to the furnace The vent termination of a non-direct vent application must cabinet, extreme care must be taken to adequately support terminate at least 4 feet below, 4 feet horizontally from, or...
- Page 17 Figure 16 12" MIN. TEE (OPTIONAL) COMBUSTION AIR INTAKE VENT/FLUE TEE ( OPTIONAL) 12” MIN (OPTIONAL) HEIGHT 45° ELBOW *Not required for TURNED DOWN or DIFFERENCE single pipe installation 90° ELBOW TURNED DOWN 12" MIN. ABOVE HIGHEST ANTICIPATED SNOW LEVEL Horizontal Termination (Single Pipe) 12”...
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Page 18: 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 20 Termination of Multiple Direct Vent Furnaces Figure 23 Vent/Intake Terminations For Installation of 90°... -
Page 19: Condensate Drain Lines & Drain Trap
Concentric Vent Termination • If an air conditioning coil is installed with the furnace, a common drain may be used. An open tee must Refer to the directions provided with the Concentric Vent be installed in the drain line, near the cooling coil, to Kit or IO-619 for installation specifications. -
Page 20: Field Supplied Drain
Hose #1 Hose #2 Figure 27 º º Field Supplied Drain barb-pipe barb-pipe Drain the furnace and air conditioning coil if applicable, adapter adapter in compliance with code requirements. In horizontal installations, a field installed rubber coupling will allow the drain trap to be removed for cleaning. The drain trap Installer selects right or left side drain must be primed before initial furnace start up. - Page 21 Front Cover Hose #6 Hose #11 Hose #2 Pressure Switch Hose #11 Hose #5 Tube Location Figure 29 Figure 30 Horizontal Installation with Right Side Down Horizontal Installation with Left Side Down Minimum 5 ½” clearance is required for the drain trap Minimum 5 ½”...
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Page 22: Electrical Connections
13. Use two silver clamps and secure the hoses to drain 10. Use two silver clamps and secure the hoses to drain trap. The trap outlet faces the front of the furnace. trap. The trap outlet faces the front of the furnace. Secure the trap to the cabinet using two screws Secure the trap to the cabinet using two screws removed in step 2 by inserting the two screws through... -
Page 23: Thermostat Requirements
Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing. Control Wiring Using 24 Volt Thermostats DM96SC furnaces may be installed with a typical 24 volt thermostat or Daikin One + Smart Thermostat. However, WARNING when a communicating outdoor unit is used, the Daikin One + thermostat must be used. -
Page 24: Refrigerant Charging
INDOOR INDOOR BOARD TERMINAL BOARD TERMINAL CONNECTIONS CONNECTIONS 24 VAC Two Stage 24 VAC Thermostat Heat Pump Thermostat Remote Condensing Unit (Single-Stage Cooling) Optional Optional Optional Optional Optional Non-Communicating Single Stage A/C Figure 33 Non-communicating Two-stage Heat Pump Figure 36 INDOOR BOARD TERMINAL CONNECTIONS... -
Page 25: Daikin Communicating System
The indoor unit then sends the demand to the ECM motor. The table below lists the various Daikin NOTE: Only Use Daikin Approved Communicating Communicating systems, the operating mode, and airflow Thermostats. -
Page 26: Auxiliary Alarm Switch
(for best results use 18 AWG). Auxiliary Alarm Switch The control is equipped with a 24VAC Aux Alarm, Typical Daikin Communicating wiring will consist of two accommodating condensate switch installations. The wires between the indoor and outdoor units, four wires connection is designated as AUX IN/OUT on the control between the indoor unit and the thermostat. - Page 27 Accessories • Profile C (3) ramps up to 85% of the full cooling When installing an external humidifier, dehumidifier, or demand airflow and operates for approximately 7 ventilator, it may require airflow setting modification at the 1/2 minutes. The motor then steps up to the 100% HVAC system to function accordingly.
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Page 28: Startup Procedure & Adjustment
• Connect the hot terminal utilized for accessory NOTE: The ignition device in this furnace lights operation to the EAC terminal and the neutral side automatically. Do not try to light the burner by of power to NEUTRAL bus on the integrated furnace hand. -
Page 29: Checking Duct Static
A closed return duct system must be used, with the return 4. Consult proper tables for the quantity of air. duct connected to the furnace. NOTE: Ductwork must never be attached to the back of the furnace. For upflow If the total external static pressure exceeds the maximum installations requiring 1800 CFM or more, use either two listed on the furnace rating plate, check for closed side returns or bottom return or a combination of side/... -
Page 30: Filters - Read This Section Before Installing The Return Air Duct Work
Filter Sizing Chart CUT USING TIN SNIPS PRESS OUT BY HAND Model Minimum Recommended Filter Size^ DM96SC0603BU 1 - 16 X 25 Side or Bottom DM96SC0805CU 1 - 20 X 25 Bottom/2 - 16 X 25 Side Return ^ Larger filters may be used, filters may also be centrally located. CUT FOUR CORNERS Table 9 AFTER REMOVING SHEET... -
Page 31: Horizontal Installations
Filters must be installed in either the central return register Screw or in the return air duct work. The Daikin MERV 15 air cleaner is available in the following configurations. Treats home air for airborne particulate matter found in the home. The high efficiency MERV 15 media filter removes more than 85% of particles down to 0.3 microns in size at 492 fpm. -
Page 32: Gas Manifold Pressure Measurement And Adjustment
Manifold Gas Pressure Range Nominal Natural 2.8 - 3.2" w.c. 3.0" w.c. Table 10 8. Remove regulator cover screw from the outlet pressure regulator adjust tower and turn screw clockwise to increase pressure or counterclockwise to decrease pressure. Replace regulator cover screw. 9. -
Page 33: Safety Circuit Description
This tells us that in one hour, the furnace would consume 78 cu. ft. of gas. (3600 / 46 = 78) SUPPLY The typical value range for 1 cu. ft. of natural gas is around 1025 BTU. Check with your gas utility, if possible. In this example, the furnace is consuming 80,000 BTUH. -
Page 34: Troubleshooting
MAINTENANCE Primary Limit The primary limit control is located on the partition panel and monitors heat exchanger compartment temperatures. WARNING It is a normally closed (electrically), automatic reset, temperature activated sensor. The limit guards against overheating as a result of insufficient conditioned air High Voltage! passing over the heat exchanger. -
Page 35: 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 36: Menu Options
MENU OPTIONS Menu Description Display LED Display Menu Description Aux (condensate switch enabled) AE Enable or disable inverter boost operation. (compressor speed may t Gas Heat Airflow Trim (default = 0%) increase when this feature is on) (inverter only) Boost mode will operate above this selected temperature. On = boost Maximum Compressor Run Time Between Defrost Cycles (default tt mode always on (default = 105°F) (inverter only) -
Page 37: Status Codes
STATUS CODES Display Description of System Status Compressor Cooling, Low Stage (non-communicating units) Compressor Cooling, High Stage (non-communicating units) Compressor Heat, Low Stage (non-communicating units) Compressor Heat, High Stage (non-communicating units) Compressor Cooling, Single-Stage (single stage non-comm. units) Compressor Cooling, Low Stage (communicating units) Compressor Cooling, High Stage (communicating units) Dehumidification Constant Fan... -
Page 38: Troubleshooting Chart
TROUBLESHOOTING CHART Symptom LED Status Fault Description Corrective Actions Populate shared data set using Daikin Data Equipment lacks shared data Loader App Normal operation None No 115 power to furnace or no 24 volt power to integrated control... - Page 39 TROUBLESHOOTING CHART Symptom LED Status Fault Description Corrective Actions Check filters for blockage, clean filters or remove obstruction Furnace operates at reduced performance or operates on Check ductwork for blockage, remove E Airflow is lower than demanded low stage when high stage is obstruction and verify all registers are fully open expected Verify ductwork is appropriately sized for system,...
- Page 40 Furnace fails to operate Open roll out switch Check for correct burner alignment Check for and correct burner restriction Populate shared data set using Daikin Data Furnace fails to operate Data not yet on network Loader App Verify shared data set is correct for the specific Operation different than ...
- Page 41 TROUBLESHOOTING CHART Symptom LED Status Fault Description Corrective Actions Flame sensed with no call for heat Correct short at flame sensor or in flame sensor Induced draft blower and wiring circulator blower runs Short to ground in flame sense EE continuously circuit Check for lingering or lazy flame...
- Page 42 TROUBLESHOOTING CHART Symptom LED Status Fault Description Corrective Actions Check filters and ductwork for blockage, clean filters or remove obstruction Aux limit switch open (blower Check circulator blower speed and performance, Furnace fails to operate compartment) correct speed or replace blower motor if necessary Tighten or correct wiring connection Aux switch (condensate switch)
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Page 43: Wiring Diagram
WIRING DIAGRAM DM96SC LEFT CENTER RIGHT DATA AC BREAK OFF BREAK OFF TABS TABS 2 R C R C G W Y COLOR CODES: BK BLACK BL BLUE BR BROWN GR GREEN GR GRAY OR ORANGE PK PINK PU PURPLE... -
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 Static Pressure IN. - Page 45 THIS PAGE IS LEFT INTENTIONALLY BLANK.
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Page 48: 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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