Daikin DM80VC Series Installation Instructions Manual

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DM80VC/DC80VC

GAS FURNACE - Category I

Catégorie 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

*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.

Our continuing commitment to quality products may mean a change in specifications without notice.

IOD-2012H

06/2023

Installer:

Affix all manuals

Adjacent to the unit.

WARNING

19001 Kermier Rd., Waller, TX 77484

www.daikincomfort.com

INSTALLATION INSTRUCTIONS

Safety Considerations ..................................................2

Product Description .....................................................4

Product Application ......................................................4

Location Requirements and Considerations ............5

Combustion and Ventilation Air Requirements .......7

Category I Venting .........................................................9

Exterior Masonry Chimneys

(Category I Furnaces Only) ...................................10

Electrical Connections ..............................................10

Gas Supply and Piping .................................................14

Circulating Air .............................................................17

Start-up Procedure And Adjustment .......................19

Daikin Communicating System ...................................24

Daikin Communicating System Advanced Features ...26

Normal Sequence of Operation ................................28

Operational Checks .....................................................30

Safety Circuit Description ........................................30

Troubleshooting ..........................................................31

Maintenance ..................................................................32

Before Leaving an Installation .................................33

Repair and Replacement Parts ..................................33

Troubleshooting Chart ..............................................34

Status Codes .................................................................39

Air Flow Data ................................................................40

Dip Switches ..................................................................41

Wiring Diagram DM80VC/DC80VC .............................42

Start-Up Check List .....................................................43

Do not bypass safety devices.

WARNING

Troubleshooting

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Summary of Contents for Daikin DM80VC Series

Page 1: Table Of Contents
Installer: Start-up Procedure And Adjustment .......19 Affix all manuals Daikin Communicating System ........24 Adjacent to the unit. Daikin Communicating System Advanced Features ...26 Normal Sequence of Operation ........28 Operational Checks .............30 Safety Circuit Description ........30 RECOGNIZE THIS SYMBOL Troubleshooting ............31 AS A SAFETY PRECAUTION Maintenance ..............32...
Page 2: Safety Considerations
SAFETY CONSIDERATIONS WARNING Adhere to the following warnings and cautions when installing, adjusting, altering, servicing, or operating the FIRE OR EXPLOSION HAZARD furnace. To ensure proper installation and operation, Failure to follow the safety warnings exactly could thoroughly read this manual for specifics pertaining to the result in serious injury, death or property damage.
Page 3: Shipping Inspection
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 4: Additional Safety Considerations
This furnace is a part of the communicating family of The carrier is responsible for making prompt inspection of products. A Daikin communicating thermostat allows this damage and for a thorough investigation of each claim. furnace to be installed as part of a digitally communicating The distributor or manufacturer will not accept claims from system.
Page 5: Location Requirements And Considerations
This furnace may be used as a construction site heater A copy of the National Fuel Gas Code (NFPA 54/ANSI ONLY if all of the following conditions are met: Z223.1) can be obtained from any of the following: • The vent system is permanently installed per these American National Standards Institute installation instructions.
Page 6 Follow the instructions listed below when selecting a • For upflow applications, the front of the coil and furnace location. Refer also to the guidelines provided in furnace must face the same direction. the Combustion and Ventilation Air Requirements. • If the furnace is installed in a residential garage, •...
Page 7: Installation Positions
• Adequate combustion/ventilation air must be supplied Furnace Suspension to the closet. If suspending the furnace from rafters or joist, use 3/8” • Furnace must be completely sealed to floor or threaded rod and 2”x2”x3/8” angle iron as shown below. base.
Page 8 WARNING AVERTISSEMENT CARBON MONOXIDE POISONING HAZARD RISQUE D’INTOXICATION AU MONOXYDE DE CARBONE Failure to follow the steps outlined below for each Si les étapes décrites ci-dessous ne sont pas suivies pour appliance 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...
Page 9: Category I Venting
Most homes will require outside air be supplied to the to discharge from the right side of the cabinet. When furnace area by means of ventilation grilles or ducts rotating the inducer, a chimney transition bottom kit (part # connecting directly to the outdoors or spaces open to the 0270F01119) is needed for proper alignment of the inducer outdoors such as attics or crawl spaces.
Page 10: Exterior Masonry Chimneys (Category I Furnaces Only)
ELECTRICAL CONNECTIONS WARNING Never allow the products of combustion, including carbon WARNING monoxide to enter the return ductwork or circulation air supply. HIGH VOLTAGE To avoid risk of electrical shock, wiring to EXTERIOR MASONRY CHIMNEYS the unit must be polarized and grounded. (CATEGORY I FURNACES ONLY) An exterior masonry chimney is defined as a “Masonry”...
Page 11: High Voltage
Use a separate fused branch electrical circuit containing After the junction box is in the desired location, use properly sized wire, and fuse or circuit breaker. The fuse washers to connect field-supplied conduit to the junction or circuit breaker must be sized in accordance with the box in accordance with NEC and local codes.
Page 12 Important Note: When using a non-communicating Non-Communica�ng Thermostat thermostat, DIP Switches S1-3 must be set to 11-Pin Connector match the thermostat type. When using a 2-Stage thermostat, set S1-3 to ON. When using a single Furnace Integrated Control Module DEHUM stage thermostat, set 1-3 to OFF.
Page 13: Volt Dehumidistat Wiring
Fossil Fuel Applications This furnace can be used in conjunction with a heat pump Move to the ON position Heat OFF Delay to select two-stage in a fossil fuel application. A fossil fuel application refers to DIP Switches thermostat or OFF to a combined gas furnace and heat pump installation which select single stage thermostat...
Page 14: Volt Humidifier
NEUTRAL 24 Volt Humidifier A 24 volt humidifier can be powered by feeding one of the HUM terminals with a field installed wire from the R terminal or by connecting to the NO side of the low fire pressure switch. Accessories Wiring Auxiliary Alarm Switch If it is necessary for the installer to supply additional line...
Page 15: Propane Gas Conversion
Inlet gas supply pressures must be maintained within the Propane Gas Conversion ranges specified in the following table. The supply pressure WARNING must be constant and available with all other household gas fired appliances operating. The minimum gas supply Possible property damage, personal injury or death may pressure must be maintained to prevent unreliable ignition.
Page 16: Upflow Installations
The following stipulations apply when connecting gas Upflow Installations piping. When the gas piping enters through the side of the furnace, • Gas piping must be supported external to the furnace the installer must supply the following fit tings (starting from cabinet so that the weight of the gas line does not the gas valve): distort the burner rack, manifold or gas valve.
Page 17: Propane Gas Piping Charts
NOTE: Never exceed specified pressures for Refer to the following illustration for typical propane gas testing. Higher pressure may damage the gas valve installations and piping. and cause subsequent overfiring, resulting in heat exchanger failure. 5 to 15 PSIG First Stage (20 PSIG Max.) Regulator Continuous...
Page 18: Digital Manometer
A duct system must be installed in accordance with Too much external static pressure will result in insufficient Standards of the National Board of Fire Underwriters for air that can cause excessive temperature rise. This can the Installation of Air Conditioning, Warm Air Heating and cause limit switch tripping and heat exchanger failure.
Page 19: Upright Installations
Safety Instructions section of this manual. If you do not smell gas after five minutes, The Daikin MERV 15 air cleaner is available in the move the furnace gas valve manual control to the ON following configurations. Treats home air for airborne position.
Page 20: Furnace Shutdown
8. Replace the burner compartment door. 9. Open the manual gas shutoff valve external to the CAUTION furnace. 10. Turn on the electrical power to the furnace. To prevent unreliable operation or equipment damage, the inlet gas supply pressure must be as specified on the unit 11.
Page 21: Gas Manifold Pressure Measurement And Adjustment
7. Measure the gas manifold pressure with burners INLET GAS SUPPLY PRESSURE firing. Adjust manifold pressure using the Manifold Natural Gas Minimum: 4.5" w.c. Maximum: 10.0" w.c. Gas Pressure table shown below. Propane Gas Minimum: 11.0" w.c. Maximum: 13.0" w.c. 8.
Page 22: Circulator Blower Speeds
seconds) divided by the number of seconds per cubic foot. The measured input must not be greater than the input indicated on the unit rating plate. SUPPLY EXAMPLE: Installation’s gas heating (HTG) value: 1,000 BTU/ft (Obtained from gas supplier) Installation’s seconds per cubic foot: 34 sec/ ft Conversion Factor (hours to seconds): 3600 sec/hr Input = (Htg.
Page 23 2. Determine the proper air flow for the cooling system. Switch Bank: S4 Most cooling systems are designed to work with DIP Switch No. Ramping air flows between 350 and 450 CFM per ton. Most Profiles manufacturers recommend an air flow of about 400 CFM per ton.
Page 24: Blower Heat Off Delay Timings
The selected speed must provide a Overview temperature rise within the rise range listed with the NOTE: When installing a Daikin One+ Smart particular model. Thermostat, please visit the Daikin One+ Smart Example: If the DM80VC0604BX is set for 1210 Thermostat website at https://www.daikinone.com...
Page 25: Airflow Considerations
Cooling Air Conditioner information). Air Conditioner + Heating Furnace Daikin Communicating Thermostat Wiring Furnace NOTE: A removable plug connector is provided Continuous Fan Thermostat with the control to make thermostat wire connections. This plug may be removed, wire connections made to the plug, and replaced.
Page 26: Daikin Communicating System Advanced Features
Two-Wire Outdoor, Four-Wire Indoor Wiring NOTE: When using a non-communicating Typical Daikin communicating wiring will consist of two condenser, cooling CFM will need to be set up wires between the indoor and outdoor units, four wires in the communicating thermostat and select the condenser size from the list 18,000 - 60,000 for between the indoor unit and the thermostat.
Page 27 DIAGNOSTICS Submenu Item Indication/User Modifiable Options Comments Fault 1 (FAULT #1) Most recent furnace fault For display only Fault 2 (FAULT #2) Next most recent furnace fault For display only Fault 3 (FAULT #3) Next most recent furnace fault For display only Fault 4 (FAULT #4) Next most recent furnace fault For display only...
Page 28: Normal Sequence Of Operation
NON-COMM (APPLIES ONLY TO A COMMUNICATING COMPATIBLE FURNACE MATCHED WITH A NON-COMMUNICATING COMPATIBLE SINGLE STAGE AIR CONDITIONER) Submenu Item User Modifiable Options Comments Cool Airflow (CL CFM) 18, 24, 30, 36, 42, 48, or 60, default Selects the airflow for the non- is 18 communicating compatible single stage AC unit...
Page 29: Heating Mode
Description Possible Cause Corrective Action Comments Normal condition None None None 1 Flash Communications Communications •Depress Learn Button •Depress once quickly for Failure Failure a power-up reset •Verify that bus BIAS and TERM dipswitches are in •Depress and hold for 2 the ON position.
Page 30: Cooling Mode
• If the two-stage thermostat changes the call from Fan Only Mode high heat to low heat, the control will immediately The normal operational sequence in fan only mode is as switch the induced draft blower and gas valve to their follows: low stage settings.
Page 31: Rollout Limit
Integrated Control Module 1. Disconnect all power to the furnace. Do not touch The integrated control module is an electronic device the integrated control module or any wire connected which, if a potential safety concern is detected, will take the to the control prior to discharging your body’s necessary precautions and provide diagnostic information electrostatic charge to ground.
Page 32: Maintenance
• All faults in the history will have been cleared, and • Heat exchanger. Check for corrosion and/or buildup display returns to ON. within the heat exchanger passageways. • If the button is held for longer than 10 seconds, the •...
Page 33: Before Leaving An Installation
Media Air Filter or Electronic Flue Passages (Qualified Servicer Only) Air Cleaner Removal The heat exchanger flue passageways should be inspected Follow the manufacturer’s directions for service. at the beginning of each heating season. Burners BEFORE LEAVING AN INSTALLATION Visually inspect the burner flames periodically during the heating season.
Page 34: Troubleshooting Chart
TROUBLESHOOTING CHART If you are attempting to install a Daikin One+ Communicating Thermostat, please visit the Daikin One+ Smart Thermostat website at http://www.daikinone.com for detailed information on the unitary error codes. If installing with a CTK04 thermostat, please continue reading for further instructions.
Page 35: High Limit
TROUBLESHOOTING CHART ComfortNet™ Symptoms of Thermostat Only Abnormal Diagnostic / Operation (Legacy Status LED Fault Description Possible Causes Corrective Actions Notes & Cautions & ComfortNet™ Codes Message Code Thermostat) • Induced draft blower • Low stage PS1 OPEN • Pressure switch hose •...
Page 36 TROUBLESHOOTING CHART Symptoms of ComfortNet™ Abnormal Diagnostic/ Thermostat Only Operation (Legacy Status LED Fault Description Possible Causes Corrective Actions Notes & Cautions & ComfortNet™ Codes Message Code Thermostat) • Furnace fails to operate. • Problem with IGNITER • Improperly connected •...
Page 37 TROUBLESHOOTING CHART ComfortNet™ Symptoms of Abnormal Diagnostic/ Thermostat Only Operation (Legacy Status LED Fault Description Possible Causes Corrective Actions Notes & Cautions & ComfortNet™ Codes Message Code Thermostat) • Operation different than • Invalid memory INVALID MC • Shared data set on •...
Page 38 TROUBLESHOOTING CHART ComfortNet™ Symptoms of Abnormal Diagnostic/ Thermostat Only Operation (Legacy Status LED Fault Description Possible Causes Corrective Actions Notes & Cautions & ComfortNet™ Codes Message Code Thermostat) • Circulator blower MOTOR • Turn power OFF prior • Furnace fails to operate. motor senses TRIPS to repair.
Page 39: Status Codes
STATUS CODES INTERNAL CONTROL FAULT/NO POWER NORMAL OPERATION LOCKOUT DUE TO EXCESSIVE RETRIES LOW STAGE PRESSURE SWITCH STUCK CLOSED AT START OF HEATING CYCLE LOW STAGE PRESSURE SWITCH STUCK OPEN OPEN HIGH LIMIT SWITCH FLAME DETECTED WHEN NO FLAME SHOULD BE PRESENT OPEN FUSE LOW FLAME SIGNAL IGNITER FAULT OR IMPROPER GROUNDING...
Page 40: Airflow Data
AIRFLOW DATA TAP Low High High TAP Low High High MODEL MODEL Stage Stage Stage Stage Stage Stage Stage Stage Cool Cool Heat Heat Cool Cool Heat Heat 1107 1012 1198 1098 DC80VC0603B*** DM80VC0603B*** 1050 1316 1034 1201 1239 1407 1253 1310 1250...
Page 41: Dip Switches
DIP SWITCHES Dip Switch Switch Bank Purpose Function Heating Off Delay 2 Stage Stat Thermostat 1 Stg Stat 5 min delay Setup 1 Stg Stat auto delay Cooling Airflow Add 5% Minus 5% Trim Add 10% Minus 10% Ramping Profile Heating Airflow Disabled Dehum...
Page 42: Wiring Diagram Dm80Vc/Dc80Vc
WIRING DIAGRAM DM80VC / DC80VC High High High High MODEL Stage Stage Stage Stage MODEL Stage Stage Stage Stage 115 VAC/ 1 Ø /60 HZ Cool Cool Heat Heat Cool Cool Heat Heat POWER SUPPLY WITH 1107 1012 OVERCURRENT ID BLOWER TWO-STAGE PRESSURE 1198 1098 PROTECTION DEVICE...
Page 43: 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 44: Customer Feedback
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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